WO2018174606A1 - Method and apparatus for transmitting uplink control channel in wireless cellular communication system - Google Patents

Abstract

The present disclosure relates to a communication technique and system thereof that fuses a 5G communication system with IoT technology to support a higher data rate than a 4G system. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or a connected car, health care, digital education, retail, a security and safety related service, etc.) on the basis of 5G communication technology and IoT related technology. According to the present invention, a method of a terminal in a wireless communication system comprises the steps of: detecting a synchronization signal block at a synchronization signal block candidate position which is determined according to a subcarrier interval of the synchronization signal block; and performing synchronization on the basis of the synchronization signal block.

Description

Method and apparatus for transmitting uplink control channel in wireless cellular communication system

The present invention relates to a method and apparatus for transmitting an uplink control channel in a wireless cellular communication system.

The present invention also relates to a method for transmitting and receiving a synchronization signal in a wireless communication system.

The present invention also relates to a method and apparatus for resource sharing between a data channel and a control channel in a wireless communication system.

In order to meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems, efforts are being made to develop improved 5G communication systems or pre-5G communication systems. For this reason, a 5G communication system or a pre-5G communication system is called a system after a 4G network (Beyond 4G Network) or a system after an LTE system (Post LTE). In order to achieve high data rates, 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band). In order to mitigate the path loss of radio waves in the ultra-high frequency band and increase the propagation distance of radio waves, beamforming, massive array multiple input / output (FD-MIMO), and FD-MIMO are used in 5G communication systems. Array antenna, analog beam-forming, and large scale antenna techniques are discussed. In addition, in order to improve the network of the system, 5G communication systems have advanced small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation The development of such technology is being done. In addition, in 5G systems, Hybrid FSK and QAM Modulation (FQAM) and Slide Window Superposition Coding (SWSC), Advanced Coding Modulation (ACM), and FBMC (Filter Bank Multi Carrier) and NOMA are advanced access technologies. (non orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

Meanwhile, the Internet is evolving from a human-centered connection network in which humans create and consume information, and an Internet of Things (IoT) network that exchanges and processes information between distributed components such as things. The Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers and the like, is emerging. In order to implement the IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between things, a machine to machine , M2M), Machine Type Communication (MTC), etc. are being studied. In an IoT environment, intelligent Internet technology (IT) services can be provided that collect and analyze data generated from connected objects to create new value in human life. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical services, etc. through convergence and complex of existing information technology (IT) technology and various industries. It can be applied to.

Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as sensor network, machine to machine (M2M), machine type communication (MTC), and the like, are implemented by techniques such as beamforming, MIMO, and array antennas. It is. Application of cloud radio access network (cloud RAN) as the big data processing technology described above may be an example of convergence of 5G technology and IoT technology.

Recently, with the development of long term evolution (LTE) and LTE-Advanced, studies on the uplink control channel transmission method in the wireless cellular communication system has been actively conducted.

An object of the present invention is to prevent resource collisions and maximize resource utilization when uplink control channels such as Long PUCCH, Short PUCCH or Sound Reference Signal (SRS) are mixed in one TTI or one slot. To provide a method and apparatus therefor for indicating a transmission interval (or start symbol and end symbol) of the Long PUCCH.

Another object of the present invention is to provide an efficient synchronization signal transmission and reception method in a mobile communication system.

In addition, another object of the present invention is required for downlink control signaling related to the transmission of downlink and uplink transport channels in a wireless communication system. In the conventional 4G LTE system, the control signaling includes downlink scheduling allocation including information required for the UE to properly receive, demodulate, and decode a physical downlink shared channel (PDSCH) and share a physical uplink with the UE. Information such as an uplink scheduling grant that informs a resource and a transmission format used for a physical uplink shared channel (PUSCH) and an acknowledgment for a hybrid automatic repeat request (HARQ) for the PUSCH. Include.

In LTE, a physical downlink control channel (PDCCH) exists as a physical layer transmission channel for transmitting downlink scheduling assignment and uplink scheduling grant, which is transmitted over the entire band at the beginning of each subframe. do. That is, a subframe may be divided into a control region and a data region, and the size of the control region is designed to occupy one, two, or three orthogonal frequency division multiplexing (OFDM) symbols. The size of the control region, expressed as the number of OFDM symbols, may vary dynamically depending on the particular situation, such as the size of the system bandwidth and whether or not the multimedia broadcast single frequency network (MBSFN) subframe is set for broadcasting. This may be indicated to each terminal through a control format indicator (CFI).

On the other hand, the 5G wireless communication system, unlike the conventional service to require a high transmission rate, as well as to support both services with a very short transmission delay and services requiring a high connection density. These scenarios should be able to provide a variety of services with different transmission and reception techniques, transmission and reception parameters in one system to meet the various requirements and services of the user, and added in consideration of future compatibility (forward compatibility) It is important to design the service so that it does not introduce any constraints that are limited by the current system. For example, scalable numerology may be used for the subcarrier intervals and may be simultaneously supported, or various services having different transmission time intervals (TTIs) may be simultaneously serviced in one system. Inevitably, 5G needs to be able to utilize time and frequency resources more flexibly than existing LTE.

The PDCCH used in LTE is not suitable for securing its flexibility in that it is transmitted over the entire band and the size of the control region is set to cell specific. Accordingly, 5G wireless communication systems are considering a structure in which a control channel can be flexibly allocated according to various requirements of a service. For example, a control resource set defined as a time and a frequency domain in which a 5G downlink control channel is transmitted may be transmitted by being set to a specific subband without being transmitted over the entire band on the frequency axis. The axis may be transmitted by setting the number of OFDM symbols having different sizes. There may be a plurality of control regions in one system, and a plurality of control regions may be set in one terminal. Therefore, it is possible to efficiently manage the control region according to whether the downlink control signal is transmitted, thereby flexibly supporting various services.

In particular, in 5G, data channels may be multiplexed and transmitted with respect to the remaining resources that are not actually used for downlink control information (DCI) transmission in a control region in order to increase resource efficiency. At this time, the position of the symbol from which the data channel starts may differ depending on whether the control region exists or reuses the control region at the frequency position at which the data channel is transmitted. Accordingly, the terminal can be instructed to the data start point to decode the data channel. In addition, the indicator for the data start point may have different overhead depending on how the control channel and the data channel share resources. Therefore, efficient base station and terminal operation is required to maximize resource efficiency while minimizing signaling overhead. Accordingly, the present invention provides a method for efficiently sharing resources between a data channel and a control channel in 5G, and a method and apparatus for additional signaling for supporting the same.

According to an aspect of the present invention, there is provided a method of a terminal in a wireless communication system, the method comprising: detecting a sync signal block at a sync signal block candidate position determined according to a subcarrier interval of a sync signal block, and the sync signal block Characterized in that it comprises the step of performing a synchronization based on.

In addition, the present invention for solving the above problems includes transmitting a sync signal block at a sync signal block candidate position determined according to a subcarrier spacing of the sync signal block in a method of a base station in a wireless communication system, The synchronization is performed based on the synchronization signal block.

In addition, the present invention for solving the above problems in the terminal in the wireless communication system, the detection unit and the synchronization signal block candidate position determined according to the subcarrier interval of the synchronization signal block to detect the synchronization signal block, the synchronization And a controller for performing synchronization based on the signal block.

In addition, the present invention for solving the above problems is a base station in a wireless communication system, the transceiver; And a control unit for transmitting the synchronization signal block at the synchronization signal block candidate position determined according to the subcarrier spacing of the synchronization signal block, wherein the synchronization is performed based on the synchronization signal block.

According to an embodiment of the present invention, when the uplink control channels such as Long PUCCH, Short PUCCH, or SRS should be transmitted in one TTI or one slot, the present invention provides a transmission interval (or start symbol and end symbol) of Long PUCCH. Suggest ways to direct. According to the method proposed by the present invention, when UEs transmit uplink control channels such as Long PUCCH, Short PUCCH, or SRS, it is possible to prevent resource collision between terminals and maximize resource utilization of the base station.

In addition, according to another embodiment of the present invention, by defining a synchronization signal transmission and reception method in a mobile communication system, the system efficiency is improved and the synchronization signal detection complexity of the terminal is reduced.

In addition, according to another embodiment of the present invention, the present invention provides a method and apparatus for sharing the resources of the downlink control channel and the downlink data channel in the 5G communication system to enable more efficient operation of the 5G system.

1 is a diagram illustrating a basic structure of a time-frequency domain in an LTE system.

2 is a diagram illustrating an example in which 5G services are multiplexed and transmitted in one system.

3 is a diagram illustrating an embodiment of a communication system to which the present invention is applied.

Fig. 4 is a diagram showing Embodiment 1-1 in the present invention.

5 is a diagram illustrating a base station and a terminal procedure for embodiment 1-1 according to the present invention.

Fig. 6 is a diagram showing Embodiment 1-2 in the present invention.

7 is a diagram illustrating a base station and a terminal procedure for embodiment 1-2 of the present invention.

8 is a diagram illustrating a base station apparatus according to the present invention.

9 is a diagram illustrating a terminal device according to the present invention.

FIG. 10 is a diagram illustrating a basic structure of a time-frequency resource region, which is a radio resource region in which data or control channels of LTE and LTE-A systems are transmitted.

11 is a diagram illustrating an example of an extended frame structure of a 5G system.

12 illustrates another example of an extended frame structure of a 5G system.

FIG. 13 is a diagram illustrating another example of an extended frame structure of a 5G system. FIG.

14 illustrates a time domain mapping structure and a beam sweeping operation of a synchronization signal.

15 is a diagram illustrating a configuration of an SS block.

16 illustrates various slot formats.

17 illustrates a method of mapping an SS block in a slot.

18 illustrates another method of mapping an SS block within a slot.

19 is a diagram illustrating an example of SS block mapping that changes according to a subcarrier spacing of a data channel.

20 illustrates an example of fixed SS block mapping regardless of subcarrier spacing of a data channel.

21 illustrates another example of fixed SS block mapping regardless of subcarrier spacing of a data channel.

FIG. 22 is a diagram illustrating another example of fixed SS block mapping regardless of subcarrier spacing of a data channel. FIG.

FIG. 23 is a diagram illustrating another example of fixed SS block mapping regardless of subcarrier spacing of a data channel. FIG.

24A and 24B illustrate a method of mapping an SS block within a period of an SS burst set.

25A and 25B illustrate another method of mapping an SS block within a period of an SS burst set.

26 is a diagram illustrating an initial access procedure of a terminal.

27 is a diagram illustrating an SS block detection procedure according to a connection state of a terminal.

FIG. 28 is a diagram illustrating a UE transceiver. FIG. 29 is a diagram illustrating PDCCH and EPDCCH, which are downlink control channels of LTE.

30 illustrates a 5G downlink control channel.

31 is a diagram illustrating resource region allocation in a 5G downlink control channel.

32 is a diagram illustrating a resource allocation method of a 5G downlink control channel.

33 is a diagram illustrating Embodiment 3-1 of the present invention.

34 is a view showing the third embodiment of the present invention.

35A and 35B illustrate an operation of a base station and a terminal of the present invention.

36 is a diagram showing Embodiment 3-3 of the present invention.

37A and 37B are diagrams illustrating operations of a base station and a terminal according to Embodiment 3-3 of the present invention.

38 is a diagram showing Embodiments 3-4 of the present invention.

39A and 39B are diagrams illustrating operations of a base station and a terminal according to Embodiments 3-4 of the present invention.

40 is a view showing a fifth embodiment of the present invention.

41A and 41B are diagrams illustrating operations of a base station and a terminal according to the fifth embodiment of the present invention.

42 is a block diagram illustrating an internal structure of a terminal according to an embodiment of the present invention.

43 is a block diagram illustrating an internal structure of a base station according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments of the present invention make the disclosure of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

First Embodiment

Hereinafter, embodiments of the present invention will be described in detail with the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments of the present invention make the disclosure of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

At this point, it will be understood that each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). It creates a means to perform the functions. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions for performing the processing equipment may also provide steps for performing the functions described in the flowchart block (s).

In addition, each block may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of order. For example, the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.

In this case, the term '~ part' used in the present embodiment refers to software or a hardware component such as an FPGA or an ASIC, and '~ part' performs certain roles. However, '~' is not meant to be limited to software or hardware. '~ Portion' may be configured to be in an addressable storage medium or may be configured to play one or more processors. Thus, as an example, '~' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and the 'parts' may be combined into a smaller number of components and the 'parts' or further separated into additional components and the 'parts'. In addition, the components and '~' may be implemented to play one or more CPUs in the device or secure multimedia card.

Hereinafter, embodiments of the present invention will be described in detail with the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

Further, in describing the embodiments of the present invention in detail, an OFDM-based wireless communication system, in particular the 3GPP EUTRA standard will be the main target, but the main subject of the present invention is another communication system having a similar technical background and channel form. In addition, it is possible to apply with a slight modification in the range without departing greatly from the scope of the present invention, which will be possible in the judgment of those skilled in the art.

In order to meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems, efforts are being made to develop improved 5G communication systems or pre-5G communication systems. For this reason, a 5G communication system or a pre-5G communication system is called a system after a 4G network (Beyond 4G Network) or a system after an LTE system (Post LTE). In order to achieve high data rates, 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band). In order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, beamforming, massive array multiple input / output (FD-MIMO) and full dimensional MIMO (FD-MIMO) in 5G communication systems Array antenna, analog beam-forming, and large scale antenna techniques are discussed.

In addition, in order to improve the network of the system, 5G communication systems have advanced small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network (ultra-dense network) Device to device communication (D2D), wireless backhaul, moving network, cooperative communication, coordinated multi-points, and interference cancellation The development of such technology is being done.

In addition, in 5G systems, advanced coding modulation (ACM), hybrid FSK and QAM modulation (SWM) and sliding window superposition coding (SWSC), and advanced access technology, FBMC (filter bank multi carrier) and NOMA Non-orthogonal multiple access (SAP) and sparse code multiple access (SCMA) are being developed.

Meanwhile, the Internet is evolving from a human-centered connection network in which humans generate and consume information, and an Internet of things (IoT) network that exchanges and processes information between distributed components such as things. The Internet of everything (IoE) technology, which combines big data processing technology through connection with cloud servers and the like, is emerging. In order to implement the IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between objects, a machine to machine : M2M), machine type communication (MTC), etc. are being studied. In the IoT environment, an intelligent Internet technology (IT) service may be provided that collects and analyzes data generated from connected objects to create new value in human life. IoT integrates and combines existing information technology (IT) technology with various industries to create smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services. It can be applied to such fields.

Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, a sensor network, a communication of things, an MTC, and the like are 5G communication technologies implemented by techniques such as beamforming, MIMO, and array antennas. The application of cloud radio access network (cloud RAN) as the big data processing technology described above may be an example of convergence of 5G technology and IoT technology.

On the other hand, research on coexistence of new 5G communication (or NR communication in the present invention) and LTE communication in the same spectrum in a mobile communication system are ongoing.

The present invention relates to a wireless communication system, and more particularly, different wireless communication systems coexist at one carrier frequency or multiple carrier frequencies, and a terminal capable of transmitting and receiving data in at least one communication system among different communication systems. The present invention relates to a method and an apparatus for transmitting and receiving data with each communication system.

In general, mobile communication systems have been developed to provide voice services while guaranteeing user activity. However, mobile communication systems are gradually expanding to not only voice but also data services, and have now evolved to provide high-speed data services. However, in the mobile communication system in which a service is currently provided, a shortage of resources and users demand faster services, and thus, a more advanced mobile communication system is required.

In response to these demands, one of the systems being developed as a next-generation mobile communication system, the specification work for LTE is underway in the 3GPP (The 3rd generation partnership project). LTE is a technology that implements high-speed packet-based communication with a transmission rate of up to 100 Mbps. To this end, various methods are discussed. For example, the network structure can be simplified to reduce the number of nodes located on the communication path, or the wireless protocols can be as close to the wireless channel as possible.

The LTE system employs a HARQ scheme for retransmitting corresponding data in the physical layer when a decoding failure occurs in the initial transmission. In the HARQ scheme, when the receiver fails to decode the data correctly, the receiver transmits a negative acknowledgment (NACK) to the transmitter, thereby enabling the transmitter to retransmit the corresponding data in the physical layer.

The receiver combines the data retransmitted by the transmitter with data that has previously failed to decode to improve data reception performance. In addition, when the receiver correctly decodes the data, the transmitter may transmit an acknowledgment (ACK) informing the transmitter of the decoding success so that the transmitter may transmit new data.

1 is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource region in which the data or control channel is transmitted in downlink in an LTE system.

In FIG. 1, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol, Nsymb (102) OFDM symbols are gathered to form one slot 106, two slots are gathered to form one subframe 105. The length of the slot is 0.5ms and the length of the subframe is 1ms. The radio frame 114 is a time domain unit consisting of 10 subframes. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is composed of a total of NBW 104 subcarriers.

The basic unit of resource in the time-frequency domain may be represented by an OFDM symbol index and a subcarrier index as a resource element (RE). A resource block 108 (RB or physical resource block; PRB) is defined as Nsymb 102 contiguous OFDM symbols in the time domain and NRB 110 contiguous subcarriers in the frequency domain. Thus, one RB 108 is composed of Nsymb x NRB REs 112. In general, the minimum transmission unit of data is the RB unit.

In the LTE system, the above Nsymb = 7, NRB = 12, NBW and NRB is proportional to the bandwidth of the system transmission band. The data rate increases in proportion to the number of RBs scheduled to the UE. The LTE system operates by defining six transmission bandwidths. In the case of an FDD system in which downlink and uplink are divided into frequencies, the downlink transmission bandwidth and the uplink transmission bandwidth may be different. The channel bandwidth represents an RF bandwidth corresponding to the system transmission bandwidth.

Table 1 shows a correspondence between system transmission bandwidth and channel bandwidth defined in the LTE system. For example, an LTE system with a 10 MHz channel bandwidth consists of 50 RBs in transmission bandwidth.

TABLE 1

The downlink control information is transmitted within the first N OFDM symbols in the subframe. Generally N = {1, 2, 3}. Accordingly, the N value may be changed for each subframe according to the amount of control information to be transmitted through the current subframe. The control information may include a control channel transmission interval indicator indicating how many OFDM symbols are transmitted, scheduling information for downlink data or uplink data, HARQ ACK / NACK signal, and the like.

In the LTE system, scheduling information for downlink data or uplink data is transmitted from the base station to the terminal through the DCI. An uplink (UL) refers to a radio link through which a terminal transmits data or a control signal to a base station, and a downlink (DL) refers to a radio link through which a base station transmits data or a control signal to a terminal.

DCI is defined in various formats, whether it is a UL grant for uplink data or a DL grant for downlink data, whether it is a compact DCI with a small control information, and multiple antennas. DCI format determined according to whether spatial multiplexing is applied or whether DCI is used for power control is applied.

For example, DCI format 1 which is scheduling control information (DL grant) for downlink data is configured to include at least the following control information.

Resource allocation type 0/1 flag: Indicates whether the resource allocation method is type 0 or type 1. Type 0 refers to a type of allocating resources in resource block group (RBG) units by applying a bitmap method. In the LTE system, a basic unit of scheduling is an RB represented by resources in a time and frequency domain, and the RBG is composed of a plurality of RBs to become a basic unit of scheduling in a type 0 scheme. Type 1 means a type of allocating a specific RB in the RBG.

Resource block assignment: indicates an RB allocated for data transmission. The resource to be represented is determined according to the system bandwidth and the resource allocation method.

Modulation and coding scheme (MCS): indicates the modulation scheme used for data transmission and the size of a transport block that is data to be transmitted.

HARQ process number: indicates a process number of HARQ.

New data indicator (NDI): Indicates whether HARQ initial transmission or retransmission.

Redundancy version (RV): indicates a redundant version of HARQ.

Transmit power control (TPC) command for PUCCH command for PUCCH: indicates a transmit power control command for PUCCH, which is an uplink control channel.

The DCI is transmitted through a downlink physical control channel PDCCH or EPDCCH (Enhanced PDCCH) through channel coding and modulation.

In general, the DCI is channel-coded independently for each UE, and then configured and transmitted with each independent PDCCH. In the time domain, the PDCCH is mapped and transmitted during the control channel transmission interval. The frequency domain mapping position of the PDCCH is determined by the identifier (ID) of each terminal and spread over the entire system transmission band.

The downlink data is transmitted through PDSCH, which is a physical channel for downlink data transmission. PDSCH is transmitted after the control channel transmission interval, and scheduling information such as specific mapping position and modulation scheme in the frequency domain is informed by DCI transmitted through the PDCCH.

The base station notifies the UE of the modulation scheme applied to the PDSCH to be transmitted and the size of the data to be transmitted (transport block size (TBS)) through the MCS composed of 5 bits of the control information configuring the DCI. The TBS corresponds to a size before channel coding for error correction is applied to data (transport block, TB) that the base station intends to transmit.

Modulation methods supported by the LTE system are Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (16QAM), and 64QAM, and each modulation order (Q _m ) corresponds to 2, 4, and 6. That is, 2 bits per symbol for QPSK modulation, 4 bits per symbol for 16QAM modulation, and 6 bits per symbol for 64QAM modulation.

In 3GPP LTE Rel-10, bandwidth extension technology has been adopted to support higher data throughput compared to LTE Rel-8. This technique, called bandwidth extension or carrier aggregation (CA), can increase the amount of data transmission by an extended band compared to an LTE Rel-8 terminal that transmits data in one band by extending the band. have.

Each of the bands is called a component carrier (CC), and the LTE Rel-8 terminal is defined to have one component carrier for downlink and uplink, respectively. In addition, a downlink component carrier and an uplink component carrier connected with SIB-2 are collectively called a cell. The SIB-2 connection relationship between the downlink component carrier and the uplink component carrier is transmitted as a system signal or a higher signal. The terminal supporting the CA may receive downlink data through a plurality of serving cells and transmit uplink data.

In Rel-10, when a base station is difficult to transmit a PDCCH in a specific serving cell to a specific UE, the base station transmits a PDCCH in another serving cell and indicates that the corresponding PDCCH indicates a PDSCH or a PUSCH of another serving cell. As a result, a carrier indication field (CIF) can be set.

The CIF may be set to a terminal supporting the CA. The CIF is determined so that another serving cell can be indicated by adding 3 bits to the PDCCH information in a specific serving cell, CIF is included only when cross carrier scheduling, and CIF is not included. Do not do it. When the CIF is included in downlink allocation information (DL assignment), the CIF indicates a serving cell to which a PDSCH scheduled by DL assignment is to be transmitted, and the CIF is included in uplink resource allocation information (UL grant). When present, the CIF is defined to indicate the serving cell to which the PUSCH scheduled by the UL grant is to be transmitted.

As described above, in LTE-10, carrier coupling (CA), which is a bandwidth extension technology, is defined, and a plurality of serving cells may be configured in the terminal. The terminal transmits channel information about the plurality of serving cells periodically or aperiodically to the base station for data scheduling of the base station. The base station schedules and transmits data for each carrier, and the terminal transmits A / N feedback for the data transmitted for each carrier.

In LTE Rel-10, it is designed to transmit up to 21 bits of A / N feedback, and when A / N feedback and channel information overlap in one subframe, it is designed to transmit A / N feedback and discard channel information. .

In LTE Rel-11, up to 22 bits of A / N feedback and one cell channel information are transmitted in PUCCH format 3 from PUCCH format 3 by multiplexing channel information of one cell with A / N feedback. It became.

In LTE-13, a maximum of 32 serving cell configuration scenarios are assumed. The concept of extending the number of serving cells to 32 by using a band in an unlicensed band as well as a licensed band is completed. In addition, in consideration of the limited number of licensed bands such as the LTE frequency, the LTE service has been provided in an unlicensed band such as the 5 GHz band, which is referred to as licensed assisted access (LAA).

In LAA, carrier aggregation technology in LTE is applied to support operation of an LTE cell, which is a licensed band, as a P cell, and an LAA cell, which is an unlicensed band, as an S cell. Accordingly, feedback generated in the LAA cell, which is an S cell, as in LTE, should be transmitted only in the P cell, and the downlink subframe and the uplink subframe may be freely applied to the LAA cell. Unless stated otherwise in this specification, LTE refers to including all of LTE evolution technology, such as LTE-A, LAA.

Meanwhile, as a communication system after LTE, that is, a fifth generation wireless cellular communication system (hereinafter, referred to as 5G or NR), various requirements such as users and service providers should be able to freely reflect various requirements. Satisfactory service can be supported.

Thus, 5G is referred to as enhanced mobile broadband (eMBB, hereinafter referred to as eMBB), massive machine type communication (mMTC, hereinafter referred to as mMTC), ultra-reliable delay Various 5G-oriented services, such as ultra reliable and low latency communications (URLLC, referred to herein as URLLC), may include a terminal maximum transmission speed of 20 Gbps, terminal maximum speed of 500 km / h, maximum delay time of 0.5 ms, and terminal connection density of 1,000,000 terminals It can be defined as a technology for satisfying the requirements selected for each 5G service among requirements such as / km2.

For example, in order to provide eMBB in 5G, it is necessary to provide a maximum transmission rate of 20 Gbps terminal in downlink and a maximum transmission rate of 10 Gbps terminal in uplink from one base station perspective. At the same time, the average transmission speed that the terminal can actually feel should also be increased. To meet this requirement, improvements in transmission and reception techniques are required, including more advanced multiple-input multiple output transmission techniques.

At the same time, mMTC is being considered to support application services such as the Internet of Things in 5G. In order to efficiently provide the Internet of Things, the mMTC needs a requirement for supporting large terminal access in a cell, improving terminal coverage, improved battery time, and reducing terminal cost. Since the IoT is attached to various sensors and various devices to provide a communication function, it must be able to support a large number of terminals (eg, 1,000,000 terminals / km 2) in a cell. In addition, since mMTC is likely to be located in a shadow area such as the basement of a building or an area that a cell cannot cover due to the characteristics of the service, it requires more coverage than the coverage provided by eMBB. The mMTC is likely to be composed of a low cost terminal, and very long battery life time is required because it is difficult to frequently change the battery of the terminal.

Finally, in the case of URLLC, it is a cellular-based wireless communication used for a specific purpose, as a service used for remote control of robots or mechanical devices, industrial automation, unmanned aerial vehicles, remote health control, emergency alerts, etc. In addition, it must provide communications that provide ultra-low latency and ultra-reliability. For example, URLLC shall be met the maximum delay time smaller than 0.5 ms, at the same time has a requirement to provide a packet error rate of 10 ^-5 or less. Therefore, URLLC must provide a smaller transmission time interval (TTI) than 5G services such as eMBB, and at the same time, a design requirement for allocating a wide resource in a frequency band is required.

The services considered in the above-mentioned fifth generation wireless cellular communication system should be provided as a framework. That is, for efficient resource management and control, it is desirable that each service is integrated and controlled and transmitted as one system rather than operated independently.

2 is a diagram illustrating an example in which services considered in 5G are transmitted to one system.

Referring to FIG. 2, the frequency-time resource 201 used by 5G may include a frequency axis 202 and a time axis 1b-03. 2 illustrates that 5G operates eMBB 205, mMTC 206 and URLLC 207 in one framework. In addition, as a service that may be additionally considered in 5G, an enhanced mobile broadcast / multicast service (eMBMS, 1b-08) for providing a broadcast service on a cellular basis may be considered.

Services considered in 5G, such as eMBB 205, mMTC 206, URLLC 207, eMBMS 208, are time-division multiplexing (TDM) or frequency within one system frequency bandwidth operating at 5G. It may be multiplexed and transmitted through frequency division multiplexing (FDM), and spatial division multiplexing may also be considered.

In the case of the eMBB 205, it is desirable to occupy the maximum frequency bandwidth at any given time in order to provide the increased data transfer rate described above. Accordingly, in the case of the eMBB (2-05) service, it is preferable to transmit TDM in another service and system transmission bandwidth 201, but according to the needs of other services, the eMBB service is FDM in other services and system transmission bandwidth. It is also desirable to transmit.

In the case of the mMTC 206, unlike other services, an increased transmission interval is required to secure wide coverage, and coverage can be secured by repeatedly transmitting the same packet within the transmission interval. At the same time, there is a limit on the transmission bandwidth that the terminal can receive in order to reduce the complexity of the terminal and the terminal price. Given this requirement, the mMTC 206 is preferably FDM transmitted with other services within a 5G transmission system bandwidth 201.

URLLC 207 preferably has a shorter transmission time interval (TTI) compared to other services to meet the ultra-delay requirements required by the service. At the same time, it is desirable to have a wide bandwidth on the frequency side because it must have a low coding rate in order to satisfy the super reliability requirements. Given this requirement of URLLC 207, it is desirable that URLLC 207 be TDM with other services within 5G of transmission system bandwidth 201.

Each of the services described above may have different transmission and reception techniques and transmission and reception parameters to satisfy the requirements required by each service. For example, each service can have a different numerology based on each service requirement. Numerology is a cyclic prefix (CP) length, a subcarrier spacing, an OFDM symbol in an orthogonal frequency division multiple access (OFDM) or a communication system based on orthogonal frequency division multiple access (OFDMA). Length, transmission interval length (TTI) and the like. As an example of having different numerologies between the above services, the eMBMS 208 may have a longer CP length than other services. Since eMBMS transmits broadcast-based higher traffic, all cells can transmit the same data. In this case, if a signal received from a plurality of cells arrives within a CP length from the terminal's point of view, the terminal may receive and decode all of these signals, thereby obtaining a single frequency network diversity (SFN) gain. Therefore, there is an advantage that the terminal located at the cell boundary can receive broadcast information without coverage limitation.

However, when the CP length is relatively long compared to other services in 5G to support eMBMS, a waste of CP overhead is generated, and thus, a long OFDM symbol length is required at the same time as other services. Narrow subcarrier spacing is required.

In addition, as an example in which different numerology is used between services in 5G, in the case of URLLC, a shorter OFDM symbol length may be required as a smaller TTI is required than other services, and at the same time, a wider subcarrier interval may be required.

Meanwhile, in 5G, one TTI may be defined as one slot, and may include 14 OFDM symbols or 7 OFDM symbols. Thus, in case of subcarrier spacing of 15 KHz, one slot has a length of 1 ms or 0.5 ms.

In addition, in 5G, one TTI can be defined as one mini-slot or sub-slot for emergency transmission and transmission in the unlicensed band, and one mini-slot is from 1 to the number of OFDM symbols in the slot. It may have a number of OFDM symbols). For example, when the length of one slot is 14 OFDM symbols, the length of the mini slot may be determined from 1 to 13 OFDM symbols. The length of the slot or mini-slot is defined in the standard or transmitted by higher-order signals or system information can be received by the terminal.

Slots or mini-slots may be defined to have various transmission formats, and may be classified into the following formats.

Downlink dedicated slot (DL only slot or full DL slot): The downlink dedicated slot consists of only a downlink period, only downlink transmission is supported.

DL centric slot: A DL center slot includes a downlink period, a guard period (GP), and an uplink period, and the number of OFDM symbols in the downlink period is the OFDM symbol in the uplink period. More than the number.

UL centric slot: The UL center slot includes a downlink period, a GP, and an uplink period, and the number of OFDM symbols in the downlink period is less than the number of OFDM symbols in the uplink period.

UL dedicated slot (UL only slot or full UL slot): The UL dedicated slot consists of only an uplink period, and only uplink transmission is supported.

In the above, only the slot format is classified, but the mini-slot may be classified in the same classification method. That is, it may be classified into a downlink dedicated mini slot, a downlink center mini slot, an uplink center mini slot, an uplink dedicated mini slot, and the like.

The transmission interval (or transmission start symbol and end symbol) of the uplink control channel may vary according to the format of the slot or mini slot. In addition, an uplink control channel having a short transmission interval (hereinafter referred to as Short PUCCH in the present invention) to minimize transmission delay and an uplink control channel having a long transmission interval (hereinafter referred to as long PUCCH in the present invention) to obtain sufficient cell coverage. It is necessary to consider that the uplink control channel is multiplexed in one slot or multiple slots, such as mixed in one slot or multiple slots, and an uplink sounding signal such as SRS is transmitted. Therefore, when the terminal is configured to transmit the uplink control channel, there is a need for a scheme for maximizing utilization of time-frequency resources of the base station and preventing collisions of transmission resources of the uplink control channel. According to the present invention, a terminal (or a start symbol and an end symbol) of an uplink control channel is indicated to a terminal for transmitting and receiving an uplink control channel in a slot or a mini slot of a base station and a terminal, and the terminal receives the values and receives a slot. Or to provide a scheme for transmitting the uplink control channel in the mini slot.

 Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it should be noted that the same components in the accompanying drawings are represented by the same reference numerals as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted.

In addition, the embodiments of the present invention will be described in detail, LTE and 5G system will be the main target, but the main subject of the present invention greatly extends the scope of the present invention to other communication systems having a similar technical background and channel form. Applicable in a few variations without departing from the scope, which will be possible in the judgment of those skilled in the art.

Hereinafter, a 5G system for transmitting and receiving data in the 5G cell will be described.

3 is a diagram illustrating an embodiment of a communication system to which the present invention is applied.

The drawings illustrate a form in which the 5G system is operated, and the methods proposed in the present invention can be applied to the system of FIG. 3.

Referring to FIG. 3, FIG. 3 illustrates a case in which a 5G cell 302 operates in one base station 301 in a network. The terminal 303 is a 5G capable terminal having a 5G transmission / reception module. The terminal 303 acquires synchronization through a synchronization signal transmitted from the 5G cell 302, and after receiving system information, transmits and receives data through the base station 301 and the 5G cell 302. In this case, there is no restriction on the duplex scheme of the 5G cell 302. The uplink control transmission is transmitted through the 5G cell 302 when the 5G cell is a Pcell. In the 5G system, the 5G cell may include a plurality of serving cells, and all of them may support 32 serving cells. In the network, it is assumed that the base station 301 includes a 5G transmission / reception module (system), and the base station 301 may manage and operate the 5G system in real time.

Next, the base station 301 sets the 5G resources, and the procedure for transmitting and receiving data from the 5G capable terminal 303 and the resources for the 5G.

In step 311, the base station 301 transmits synchronization, system information, and higher configuration information for 5G to the 5G capable terminal 1c-03. As the synchronization signal for 5G, separate synchronization signals may be transmitted for eMBB, mMTC, and URLLC using different numerologies, and a common synchronization signal may be transmitted to a specific 5G resource using one numerology. As the system information, common system information may be transmitted to a specific 5G resource using one numerology, and separate system information may be transmitted for eMBB, mMTC, and URLLC using another numerology. The system information and higher configuration information include configuration information on whether data transmission / reception is to a slot or a mini slot, and may include the number of OFDM symbols and numerology of a slot or a mini slot. The system information and higher configuration information may include configuration information related to the downlink common control channel reception when downlink common control channel reception is configured for the terminal.

In step 312, the base station 301 transmits and receives data for 5G service with the 5G capable terminal 303 in 5G resources.

Next, the 5G capable terminal 303 receives a 5G resource from the base station 301 and describes a procedure of transmitting and receiving data in the 5G resource.

In step 321, the 5G capable terminal 303 acquires synchronization from the synchronization signal for 5G transmitted by the base station 301, and receives system information and higher configuration information transmitted by the base station 301. As the synchronization signal for 5G, separate synchronization signals may be transmitted for eMBB, mMTC, and URLLC using different numerologies, and a common synchronization signal may be transmitted to a specific 5G resource using one numerology. As the system information, common system information may be transmitted to a specific 5G resource using one numerology, and separate system information may be transmitted for eMBB, mMTC, and URLLC using another numerology. The system information and higher configuration information include configuration information on whether data transmission / reception is to a slot or a mini slot, and may include the number of OFDM symbols and numerology of a slot or a mini slot. The system information and higher configuration information may include configuration information related to the downlink common control channel reception when the downlink common control channel reception is configured for the terminal.

In step 322, the 5G capable terminal 303 transmits and receives data for 5G service with the base station 301 in 5G resources.

Next, when the uplink control channels such as Long PUCCH, Short PUCCH or SRS are mixed in one TTI or one slot in the situation that the 5G system of FIG. 3 is operated as a slot or a mini slot, it prevents resource collision and maximizes resource utilization. To this end, a scheme for transmitting a long PUCCH will be described based on a scheme for indicating a transmission interval (or a start symbol and an end symbol) of the long PUCCH.

First, FIG. 4 is a diagram showing Embodiment 1-1 in the present invention.

In FIG. 4, a method of transmitting an uplink control channel by determining a transmission interval (or a start symbol and an end symbol) of a long PUCCH based on a slot will be described. However, a transmission interval of a long PUCCH by a terminal based on a mini slot is described. Note that the present invention may also be applied to a case of transmitting an uplink control channel by determining (or starting and ending symbols).

In FIG. 4, the Long PUCCH and the Short PUCCH are multiplexed in the frequency domain (FDM, 400) or multiplexed in the time domain (TDM, 401). First, a slot structure in which long PUCCH and short PUCCH are multiplexed in FIG. 4 will be described.

420 and 421 may have various names such as slots (subframes or transmission time intervals (TTIs), etc., which are transmission basic units of 5G. In the present invention, uplink is mainly used within a slot.) That is, the UL centric slot (UL centric slot) is shown.

The uplink center slot is a case where the number of OFDM symbols used for uplink is the most, and the entire OFDM symbol may be used for uplink transmission, or some of the preceding OFDM symbols are used for downlink transmission. In addition, when downlink and uplink are simultaneously present in one slot, a transmission gap may exist between the two.

In FIG. 4, the first OFDM symbol in one slot is used for downlink transmission, for example, downlink control channel transmission 402, and is used for uplink transmission from the third OFDM symbol. The second OFDM symbol is used as a transmission gap. In uplink transmission, uplink data channel transmission and uplink control channel transmission are possible.

Next, the long PUCCH 403 will be described. Since the control channel of the long transmission period is used for the purpose of increasing the cell coverage, it can be transmitted in the DFT-S-OFDM scheme, which is a single carrier transmission rather than an OFDM transmission. Therefore, in this case, only the continuous subcarriers should be transmitted, and in order to obtain a frequency diversity effect, an uplink control channel of a long transmission interval is configured at a distance such as 408 and 409. The distance 405 falling in terms of frequency should be smaller than the bandwidth supported by the terminal, and the long PUCCH is transmitted using PRB-1 as shown in 408 at the front of the slot, and PRB-2 as shown in 409 at the back of the slot. Is sent. The PRB is a physical resource block, which means a minimum transmission unit on the frequency side, and may be defined as 12 subcarriers. Accordingly, the frequency side distance between the PRB-1 and the PRB-2 should be smaller than the maximum support bandwidth of the terminal, and the maximum support bandwidth of the terminal may be equal to or smaller than the bandwidth 406 supported by the system. The frequency resources PRB-1 and PRB-2 may be set to the terminal by a higher signal, and a frequency field is mapped to a bit field by a higher signal, and a bit field included in a downlink control channel indicates which frequency resource is to be used. It may be instructed to the terminal by.

In addition, the control channel transmitted at the front of the slot of 408 and the control channel transmitted at the rear of the slot of 409 are composed of uplink control information (UCI) of 410 and the terminal reference signal 411, respectively. Assume that it is transmitted in an OFDM symbol.

Next, the short PUCCH 418 will be described. Short PUCCH may be transmitted in both the downlink center slot and the uplink center slot, and is generally used as the last symbol of the slot, or the OFDM symbol at the end (for example, the last OFDM symbol or the second to last OFDM symbol, or the last). 2 OFDM symbols). Of course, it is also possible to transmit a short PUCCH at any position within the slot. The short PUCCH may be transmitted using one OFDM symbol or a plurality of OFDM symbols.

In FIG. 4, the short PUCCH is transmitted in the last symbol 418 of the slot. Radio resources for the short PUCCH are allocated in units of PRBs on the frequency side. The allocated PRBs may be allocated a plurality of consecutive PRBs, or may be allocated a plurality of PRBs separated from each other in the frequency band. The allocated PRB should be included in the same or smaller band than the frequency band 407 supported by the terminal. The plurality of PRBs, which are the allocated frequency resources, may be set to the terminal by a higher signal, and a frequency resource is mapped to a bit field by a higher signal, and which frequency resource is used by a bit field included in a downlink control channel. The terminal may be instructed. The uplink control information 420 and the demodulation reference signal 421 should be multiplexed in a frequency band in one PRB. As shown in 412, a method of transmitting a demodulation reference signal to one subcarrier for every two symbols, Alternatively, as shown in 413, there may be a method of transmitting a demodulation reference signal to one subcarrier for every three symbols, or a method of transmitting a demodulation reference signal to one subcarrier for every four symbols as shown in 414.

Next, the above-described long PUCCH and short PUCCH are multiplexed. In one slot 420, the long PUCCH and the short PUCCH of different terminals may be multiplexed in the frequency domain (400). At this time, the base station may set the short PUCCH and the long PUCCH frequency resources of different terminals so as not to overlap as in the PRB of FIG. 4. However, setting different transmission resources of uplink control channels of all terminals regardless of scheduling is a waste of frequency, and considering that limited frequency resources should be used for uplink data channel transmission rather than uplink control channel transmission. Not appropriate Therefore, the frequency resources of the short PUCCH and the long PUCCH of different terminals may overlap, and the base station must operate so that the scheduling and transmission resources of different terminals do not collide in one slot.

However, if a short PUCCH transmission resource and a long PUCCH transmission resource of different UEs cannot collide with each other in a specific slot, the base station needs a scheme for preventing the long PUCCH transmission resource from colliding with the transmission resource of the short PUCCH. It is necessary to adjust the long PUCCH transmission resources according to the indication of the base station. By the above scheme, the transmission resources of the short PUCCH and the long PUCCH may be multiplexed in the time domain in one slot 421 (401).

In the present invention, an uplink control channel transmission in a short time domain such as short PUCCH or SRS provides a scheme for avoiding transmission resource collision with long PUCCH, which is uplink control channel transmission in a long time domain.

The solution in the present invention can be largely described in two ways. First, the base station directly transmits a long PUCCH transmission resource in one slot to a UE through a first signal in order to avoid collision between a long PUCCH transmission resource in one slot and an uplink control channel transmission resource in a short time domain. In this case, the terminal performs long PUCCH transmission on the transmission resource indicated in one slot through reception of the first signal.

The first signal may be composed of an upper signal, a physical signal, or a combination of an upper signal and a physical signal, and the like. The first signal may include an OFDM symbol interval (or a starting OFDM symbol) in a time domain for transmitting a long PUCCH. End OFDM symbol) and a PRB in the frequency domain.

The second is directly or indirectly through the definition in the specification in which a base station associates a long PUCCH transmission resource in one slot with a first signal or the transmission resource of a long PUCCH from the number of up-down OFDM symbols and the number of GP OFDM symbols of a slot. In order to instruct the UE in advance, and to avoid collision with the uplink control channel transmission resource in the short time domain, the previously indicated long PUCCH transmission resource is reduced or controlled through a second signal in one slot. The terminal determines in advance the transmission interval of the long PUCCH from the reception of the first signal or the number of up-down OFDM symbols and the number of GP OFDM symbols of the slot, and adjusts the long PUCCH transmission resource in one slot by receiving the second signal. Performs long PUCCH transmission in one slot.

The first signal and the second signal may be composed of an upper signal, a physical signal, or a combination of an upper signal and a physical signal. The first signal includes an OFDM symbol interval (or a start OFDM symbol and an end OFDM symbol) in the time domain for transmission of the long PUCCH, a PRB in the frequency domain, and the like. The second signal includes a long PUCCH in one slot. OFDM symbol interval (or start OFDM symbol and end OFDM symbol) in the time domain where transmission cannot be performed, and PRB in the frequency domain.

The first scheme is suitable for uplink control channel transmission, such as periodic channel information transmission, which is set to the terminal to be periodically transmitted without a scheduling grant. The second scheme is a terminal to be transmitted aperiodically by a scheduling grant. It is suitable for uplink control channel transmission such as HARQ-ACK transmission. Therefore, depending on whether the uplink control channel transmitted by the UE is triggered by a scheduling grant or whether the uplink control information transmitted is periodic channel information or HARQ-ACK, the first and second methods may be applied. Can be. That is, the terminal applies the first scheme to the transmission of the uplink control channel configured to transmit the uplink control channel without the scheduling grant, and triggers the terminal to transmit the uplink control channel by the scheduling grant. If it is, the terminal may apply the second scheme to the uplink control channel.

Alternatively, the terminal may apply the first scheme for the transmission of the uplink control channel for transmitting periodic channel information, and the terminal may apply the second scheme for the uplink control channel for transmitting HARQ-ACK information.

Alternatively, the base station may set to the terminal whether to always apply the first scheme or the second scheme using the higher signal. When the UE receives the configuration information for always applying the first scheme to the uplink control channel through an upper signal, the UE always transmits the uplink control channel by applying the first scheme and always provides two uplink control channels. When the UE receives configuration information for applying the second scheme through a higher signal, the UE always transmits an uplink control channel by applying the second scheme.

Specific methods for the first and second methods will be described below.

In the first method, the base station instructs the UE of an OFDM symbol interval (or a start OFDM symbol and an end OFDM symbol or an OFDM symbol to avoid long PUCCH transmission) for a long PUCCH transmission in a downlink control channel. The downlink control channel may be common information to a group terminal or all terminals in a cell, or may be dedicated information transmitted only to a specific terminal. For example, when a long PUCCH transmission frequency resource of a terminal collides with a short PUCCH transmission frequency resource of another terminal in the last OFDM symbol of the slot, the base station may avoid the long PUCCH transmission interval to avoid the last OFDM symbol of the slot.

For example, when the long PUCCH transmission interval is supported from 4 OFDM symbols to 12 OFDM symbols (the uplink interval of the up-center slot of 420 is 12 OFDM symbols), the base station instead of the long PUCCH transmission in 12 OFDM symbols Long PUCCH transmission in 11 OFDM symbols is indicated by a bit field of a downlink control channel, and a UE transmits long PUCCH in 11 OFDM symbols. In another example, when the long PUCCH transmission interval is set as an upper signal or is defined as a specification in a set including at least one value of a restricted symbol interval, the upper PUCCH transmission interval may be transmitted only in 4, 6, 8, 10, 12 OFDM symbols, for example. If the signal is set or defined as a standard, in order to avoid collision with short PUCCH transmission resources in the last OFDM symbol, the base station indicates the long PUCCH transmission in the 10 OFDM symbol to the bit field of the downlink control channel, the terminal 10 OFDM Transmit long PUCCH in symbol.

Alternatively, the base station may indicate to the terminal whether the interval for the short PUCCH transmission (or the last OFDM symbol of the slot, the last or second OFDM symbol, or the last two OFDM symbols) to avoid resource collision with the long PUCCH. .

In the second method, the base station configures an OFDM symbol period (or a start OFDM symbol and an end OFDM symbol or an OFDM symbol which should be avoided in a long PUCCH transmission) for the UE as an upper signal. For example, the short PUCCH transmission frequency resource may be configured with distributed PRBs or may be configured with localized PRBs. Since the short PUCCH transmission frequency resource has a high probability of collision with the long PUCCH transmission resource when the distributed PRBs have distributed PRBs, the base station avoids OFDM symbols in which the short PUCCH is transmitted with the long PUCCH transmission OFDM symbol interval as an upper signal, for example, the last OFDM symbol. You can do that. For example, the long PUCCH transmission interval is set as an upper signal to the terminal to transmit a higher signal in 10 OFDM symbols, and the terminal performs long PUCCH transmission in 10 OFDM symbols.

In the third method, the base station sets whether to perform long PUCCH transmission or short PUCCH transmission as an upper signal or a physical downlink control signal to the UE, and sets an OFDM symbol interval for the long PUCCH transmission according to the slot format. It is associated with the number of OFDM symbols. However, the UE indicates information on whether or not the long PUCCH transmission can be performed even in the last 1 or 2 OFDM symbols. The UE may determine whether to transmit the long PUCCH or the short PUCCH by receiving the configuration information. When receiving the indication information and performing the long PUCCH transmission, the terminal may perform the long PUCCH transmission even in the last 1 or 2 OFDM symbols. Determine if you can or not. That is, assuming that the uplink OFDM symbol interval in the slot is 11 OFDM symbols, the UE determines that the long PUCCH transmission is transmitted in the 11 OFDM symbol interval from the uplink OFDM symbol interval of the slot, and receives the indication information to receive the terminal May determine whether to perform long PUCCH transmission in 11 OFDM symbols, long PUCCH transmission in 10 OFDM symbols, or long PUCCH transmission in 9 OFDM symbols. When long PUCCH is transmitted in 10 OFDM symbol or 9 OFDM symbol, the long PUCCH symbol may be punctured from the back or rate-matched based on the long PUCCH transmission in 11 OFDM symbol. Information on the uplink OFDM symbol interval of the slot is received by a terminal from a downlink control channel, the downlink control channel may be common information to all terminals in a group terminal or a cell, dedicated information transmitted only to a specific terminal It may be.

5 is a diagram illustrating a base station and a terminal procedure for embodiment 1-1 according to the present invention.

First, the base station procedure will be described.

In step 511, the base station transmits uplink control channel configuration information to the terminal. The uplink control channel configuration information includes a possible set including at least one value of a frequency PRB resource of a long PUCCH or a short PUCCH or a time OFDM symbol interval as described in FIG. 4, and the base station transmits a short PUCCH or long PUCCH between terminals. In order to avoid resource conflicts, the information may be transmitted to the terminal through an upper signal.

In step 512, the base station transmits a downlink control channel to the terminal. The downlink control channel includes a bit field indicating a frequency PRB or time OFDM symbol interval of a short PUCCH or a long PUCCH or a start OFDM symbol and an OFDM symbol to avoid transmission of an end OFDM symbol or a long PUCCH as described in FIG. 4. The base station may transmit the information to the terminal in order to avoid short PUCCH or long PUCCH transmission resource collision between the terminals. The downlink control channel may be common information to all terminals in a group terminal or a cell, or may be dedicated information transmitted only to a specific terminal.

In step 513, the base station receives an uplink control channel from the terminal in the short PUCCH or long PUCCH transmission time and frequency resources indicated in step 511 or 512.

Next, the terminal procedure will be described.

In step 521, the terminal receives uplink control channel configuration information from the base station. The uplink control channel configuration information includes a possible set including a frequency PRB resource of a long PUCCH or a short PUCCH or at least one value of a time OFDM symbol interval as described in FIG. 4, and the terminal transmits a short PUCCH or long PUCCH between terminals. In order to avoid resource collision, the information may be received from the base station through a higher signal.

In step 522, the terminal receives a downlink control channel from the base station. The downlink control channel includes a bit field indicating a frequency PRB or time OFDM symbol interval of a short PUCCH or a long PUCCH or a start OFDM symbol and an OFDM symbol to avoid transmission of an end OFDM symbol or a long PUCCH as described in FIG. The terminal may receive the information from the base station in order to avoid short PUCCH or long PUCCH transmission resource collision between the terminals. The downlink control channel may be common information to a group terminal or all terminals in a cell, or may be dedicated information transmitted only to a specific terminal.

In step 523, the UE transmits an uplink control channel to the base station in the short PUCCH or long PUCCH transmission time and frequency resources received in step 521 or 522.

Fig. 6 is a diagram showing a second embodiment of the present invention.

In FIG. 6, a terminal receives an OFDM symbol interval (or a start OFDM symbol position and an end symbol position or an OFDM symbol not transmitting a long PUCCH) of a long PUCCH of an uplink control channel and transmits an uplink control channel. Although the scheme is described, the terminal receives an OFDM symbol interval (or a start OFDM symbol position and an end symbol position or an OFDM symbol not transmitting a long PUCCH) of a long PUCCH of an uplink control channel based on a mini slot. Note that it can also be applied when transmitting.

In FIG. 4, the difference between FIG. 4 and FIG. 6 considers a case in which an uplink control channel such as a long PUCCH and a short PUCCH or SRS transmission collides in one slot. In FIG. 6, a long PUCCH is transmitted over a plurality of slots. In case that slot aggregation is set to the UE by the higher signal or indicated to the UE by the L1 signal, a scheme for avoiding collision of short PUCCH or SRS transmission resources with the transmission resource of the long PUCCH transmitted over a plurality of slots is provided. to provide.

As described above, 5G supports various slot formats, that is, a downlink dedicated slot, a downlink center slot, an uplink dedicated slot, and an uplink center slot. Each slot format may also be configured with various OFDM symbols in a downlink period, a GP, and an uplink period. The slot format and format structure (the number of OFDM symbols in the downlink period, the GP, and the uplink period) may be received by the terminal by an upper signal or an L1 signal.

In order to improve coverage of the UE, slot aggregation may be set to the UE as an upper signal or indicated by an L1 signal. Slot aggregation is configured or indicated, and a terminal configured or indicated to transmit long PUCCH transmits a long PUCCH over a plurality of slots. The number of slots in which slot aggregation is performed may be set or indicated to the terminal by a higher signal or an L1 signal.

Like the slot format of FIG. 6, the plurality of slots may have various slot formats. If slot aggregation is configured or indicated to the UE to be performed over four slots, the number of uplink OFDM symbols capable of transmitting long PUCCH is changed according to the slot format or format structure of the four slots. For example, in FIG. 6, long PUCCH may be transmitted in 14 OFDM symbols as slot #n is an uplink-specific slot, and long PUCCH may be transmitted in 12 OFDM symbols as slot # (n + 1). Slot # (n + 2) is an uplink center slot. Long PUCCH may be transmitted in 11 OFDM symbols. However, in the last symbol, a long PUCCH transmission resource collides with a long PUCCH transmission resource and thus long in 10 OFDM symbols. Assume that PUCCH can be transmitted. Slot # (n + 3) is an uplink center slot and long PUCCH can be transmitted in 11 OFDM symbols. However, in the last 2 OFDM symbols, the transmission resource of short PUCCH and SRS collides with the long PUCCH transmission resource and thus 9 OFDM It is assumed that long PUCCH can be transmitted in a symbol. In this case, in order to avoid collision with uplink control channel transmission resources in a short time domain such as short PUCCH or SRS, the base station provides a scheme for indicating a long PUCCH transmission resource to the terminal.

The solution in the embodiment 1-2 of the present invention can be largely described in two ways. First, in order to avoid a collision between a long PUCCH transmission resource in a plurality of slots in which slot aggregation is configured as a third signal and an uplink control channel transmission resource in a short time domain, a base station transmits a long PUCCH transmission resource in a plurality of slots. Indicates to the terminal directly through the first signal. Accordingly, the terminal determines a plurality of slots to which slot aggregation is applied as a third signal, and performs long PUCCH transmission on transmission resources indicated in the plurality of slots through reception of the first signal.

The first signal or the third signal may be configured as an upper signal, a physical signal, or a combination of an upper signal and a physical signal. The first signal is an OFDM symbol interval (or a start OFDM symbol and an end OFDM symbol) in a time domain for transmission of a long PUCCH, and a PRB in a frequency domain so that the first signal is applied to each slot in a plurality of slots to which one slot aggregation is applied. The number of slots to which slot aggregation is applied may be included. Alternatively, the first signal is OFDM symbol interval (or start OFDM symbol and end OFDM symbol) in the time domain for transmission of long PUCCH and PRB in the frequency domain so that the first signal is commonly applied to a plurality of slots to which one slot aggregation is applied. It may include. The third signal includes related information for performing slot aggregation, such as information on the number of slots to which slot aggregation is applied and information on an index of a slot to which slot aggregation is applied.

The second is directly or indirectly through the definition in the specification in which a base station associates a long PUCCH transmission resource in one slot with a first signal or the transmission resource of a long PUCCH from the number of up-down OFDM symbols and the number of GP OFDM symbols of a slot. In order to instruct the terminal in advance, and in order to avoid a collision with an uplink control channel transmission resource in a short time domain in a plurality of slots in which slot aggregation is configured as a third signal, the previously indicated long PUCCH transmission resource through a second signal. To reduce or adjust the number of slots for which slot aggregation is set. The terminal determines in advance the transmission interval of the long PUCCH from the reception of the first signal or the number of up-down OFDM symbols and the number of GP OFDM symbols of the slot, and the terminal determines a plurality of slots to which slot aggregation is applied as the third signal After receiving the second signal, the long PUCCH transmission resource is adjusted in a plurality of slots to perform long PUCCH transmission. The first signal, the second signal, and the third signal may be configured as an upper signal, a physical signal, or a combination of the upper signal and the physical signal.

The first signal includes an OFDM symbol period (or a start OFDM symbol and an end OFDM symbol) in the time domain for transmission of the long PUCCH, a PRB in the frequency domain, and the like.

The second signal is transmitted in an OFDM symbol interval (or start OFDM symbol and end OFDM symbol) in the time domain and in the frequency domain in which a long PUCCH cannot be transmitted to be applied to each slot in a plurality of slots to which one slot aggregation is applied. The PRB may include as many as the number of slots to which slot aggregation is applied. Alternatively, the second signal may be applied in the OFDM symbol interval (or the start OFDM symbol and the end OFDM symbol) in the time domain and in the frequency domain in which the long PUCCH cannot be transmitted so that the second signal is commonly applied in a plurality of slots to which one slot aggregation is applied. PRB, and the like.

The third signal includes information on slot aggregation, such as information on the number of slots to which slot aggregation is applied and information on an index of a slot to which slot aggregation is applied.

The first scheme is suitable for uplink control channel transmission such as periodic channel information transmission configured to the terminal to be periodically transmitted without a scheduling grant, and the second scheme is HARQ configured to the terminal to be aperiodically transmitted by a scheduling grant. Suitable for uplink control channel transmission such as -ACK transmission. Accordingly, the first scheme and the second scheme may be applied depending on whether the uplink control channel transmitted by the UE is triggered by a scheduling grant or whether the uplink control information transmitted is periodic channel information or HARQ-ACK. That is, when the UE applies the first scheme and transmits the UL control channel by the scheduling grant, the UE transmits the UL control channel configured to transmit the UL control channel without the scheduling grant. It is also possible for the terminal to apply the second scheme for the uplink control channel.

Alternatively, the terminal may apply the first scheme for the transmission of the uplink control channel for transmitting periodic channel information, and the terminal may apply the second scheme for the uplink control channel for transmitting HARQ-ACK information.

Alternatively, the base station may set whether to apply the first scheme or the second scheme to the terminal using the higher signal. When the UE receives configuration information that always applies the first scheme to the uplink control channel through a higher signal, the UE always applies the first scheme to transmit the uplink control channel and always the second to the uplink control channel. When the terminal receives configuration information for applying the scheme through the higher signal, the terminal always transmits the uplink control channel by applying the second scheme.

Specific methods for the first and second methods will be described below.

In the first method, when the slot aggregation is configured as a higher signal or when slot aggregation is indicated in a downlink control channel, a base station can perform an OFDM symbol interval (e.g., max. OFDM symbol interval) for long PUCCH transmission (or start OFDM). A symbol and an end OFDM symbol or an OFDM symbol that should be avoided from long PUCCH transmission are the last 1 OFDM symbol or the last 2 OFDM symbol) to indicate to the UE in the upper signal or the downlink control channel. The downlink control channel may be common information to all terminals in a group terminal or a cell, or may be dedicated information transmitted only to a specific terminal.

For example, in the case of the above example, the base station can transmit a long PUCCH transmission interval in slot #n OFDM symbol 14, in OFDM symbol 12, slot # (n + 1), in OFDM symbol 12, slot # (n + 2). In symbol 10 and slot # (n + 3), a OFDM symbol capable of performing long PUCCH transmission among OFDM symbols 9 that can be transmitted may be set. For example, when a long PUCCH transmission interval is supported from 4 OFDM symbols to 12 OFDM symbols, the base station indicates the long PUCCH transmission in the bit field of the downlink control channel in 9 OFDM symbols, the terminal from slot #n Long PUCCH is transmitted in 9 OFDM symbols in 4 slots of slot # (n + 3). As another example, when the long PUCCH transmission interval is set to a higher signal as a set of restricted symbol intervals or is defined as a standard, for example, the long PUCCH transmission interval is set to an upper signal to be transmitted only in 4, 6, 8, 10, 12 OFDM symbols, or as a standard. If defined, in order to avoid collision with short PUCCH or SRS transmission resources in all slots in which slot aggregation is performed, the base station indicates a long PUCCH transmission in 8 OFDM symbols as a bit field of a physical downlink control channel, and the terminal indicates 8 OFDM symbols. Transmit long PUCCH

In the second method, when slot aggregation is configured as a higher signal or when slot aggregation is indicated in a downlink control channel, an OFDM symbol interval (or a start OFDM symbol and an end OFDM symbol or long PUCCH transmission for long PUCCH transmission) should be avoided. Whether the OFDM symbol is the last 1 OFDM symbol or the last 2 OFDM symbols) is indicated to the UE in advance for all slots in which slot aggregation is performed.

The downlink control channel may be common information to all terminals in a group terminal or a cell, or may be dedicated information transmitted only to a specific terminal. For example, in the case of the above example, the base station sets a long PUCCH transmission interval of 11 symbols to the terminal according to an upper signal, and transmits OFDM symbol 14 that can be transmitted in slot #n, OFDM symbol 12 that can be transmitted in slot # (n + 1), The OFDM symbol 10 transmittable in slot # (n + 2) and the OFDM symbol 9 transmittable in slot # (n + 3) are indicated through a downlink control channel. For example, when the long PUCCH transmission interval is supported from 4 OFDM symbols to 12 OFDM symbols, the base station sets the long PUCCH transmission to the upper signal in 11 OFDM symbols, slot #n to slot # (n + 3) The downlink control channel indicates whether the long PUCCH transmission can be performed in the last OFDM symbol or the last 2 OFDM symbols in four slots of. Upon receiving the configuration information and the indication information, the UE transmits long PUCCHs in 11, 11, 10, and 9 OFDM symbols in four slots of slot #n to slot # (n + 3), respectively. As another example, when the long PUCCH transmission interval is set to a higher signal as a limited set of symbol intervals or is defined as a standard, for example, the long PUCCH transmission interval is set as an upper signal to be transmitted only in 4, 6, 8, 10, 12 OFDM symbols, or is defined as a standard In this case, in order to avoid collision with short PUCCH or SRS transmission resources in all slots in which slot aggregation is performed, the base station sets long PUCCH transmission as an upper signal in 10 OFDM symbols, and slots #n to 4 of slots # (n + 3). The downlink control channel indicates whether long PUCCH transmission can be performed in the last OFDM symbol or the last 2 OFDM symbols in two slots. Upon receiving the configuration information and the indication information, the UE transmits long PUCCH in OFDM symbols of 10, 10, 10, and 8 in four slots of slot #n to slot # (n + 3), respectively.

The third method is for the base station to configure an OFDM symbol interval (or a start OFDM symbol and an end OFDM symbol or an OFDM symbol which should be avoided for long PUCCH transmission) for the UE as an upper signal. For example, the short PUCCH transmission frequency resource may be configured with distributed PRBs or may be configured with localized PRBs.

Since the short PUCCH transmission frequency resource has a high probability of collision with the long PUCCH transmission resource when the distributed PRBs have distributed PRBs, the base station transmits the OFDM symbols (eg, the last OFDM symbol) in which the short PUCCH is transmitted as a higher signal over the long PUCCH transmission OFDM symbol interval. Can be set to avoid. For example, the base station sets the long PUCCH transmission interval as an upper signal to the terminal to transmit in an 8 OFDM symbol as a higher signal, and when the slot aggregation is configured to be performed, the terminal is transmitted in 8 OFDM symbols in all slots where slot aggregation is performed. Performs long PUCCH transmission.

In the fourth method, the base station sets whether to perform long PUCCH transmission or short PUCCH transmission as an upper signal or a physical downlink control signal to the UE, and sets an OFDM symbol interval for the long PUCCH transmission according to the slot format. Associate with the number of symbols. In this case, information indicating whether or not the long PUCCH transmission can be performed even in the last 1 or 2 OFDM symbols in all slots or slots in which slot aggregation is configured, indicates to the UE as an upper signal or a physical signal. The UE may determine whether to transmit the long PUCCH or the short PUCCH by receiving the configuration information. When receiving the indication information and performing the long PUCCH transmission, the terminal may perform the last 1 or 2 OFDM in all slots performing slot aggregation. It is determined whether the long PUCCH transmission can be performed even in a symbol. The indication information may be applied to all slots in which one bit field is performed for slot aggregation, or may include respective bit fields applied to each slot. For example, suppose that one bit field is applied to all slots in which slot aggregation is performed, indicating that long PUCCH transmission cannot be performed in the last 1 OFDM symbol. Assuming that the uplink OFDM symbol interval is 14, 12, 11, and 9 OFDM symbols in all slots for performing slot aggregation, the UE has long PUCCHs of 14, 12, 11 from the uplink OFDM symbol interval in the slots, respectively. It is determined that the data is transmitted in the 9 OFDM symbol period, and the indication information is received to perform long PUCCH transmission in every slot 13, 11, 10, 8 OFDM symbols. When the long PUCCH is transmitted in 13, 11, 10, and 8 OFDM symbols, the long PUCCH symbol may be punctured from the back or rate-matched based on the long PUCCH transmission in the 14 OFDM symbol. Information on the uplink OFDM symbol interval of the slot is received by a terminal from a downlink control channel, the downlink control channel may be common information to all terminals in a group terminal or a cell, dedicated information transmitted only to a specific terminal It may be.

7 is a diagram illustrating a base station and a terminal procedure for embodiment 1-2 of the present invention.

First, the base station procedure will be described.

In step 711, the base station transmits uplink control channel configuration information to the terminal. The uplink control channel configuration information includes information required for possible aggregation or slot aggregation including at least one value of a frequency PRB resource of a long PUCCH or a short PUCCH or a time OFDM symbol interval as described in FIG. 4 or 6. Number of slots, etc.) or a time OFDM symbol interval capable of transmitting a long PUCCH in a plurality of slots configured with slot aggregation, and the base station configures the uplink control to avoid short PUCCH or long PUCCH transmission resource collision between terminals. Information may be transmitted to the terminal through an upper signal.

In step 712, the base station transmits a downlink control channel to the terminal. The downlink control channel is a bit field indicating a frequency PRB or time OFDM symbol interval of a short PUCCH or long PUCCH or an OFDM symbol to avoid transmission of an end OFDM symbol or a long PUCCH as described in FIG. 4 or 6. Or, it includes information required for slot aggregation (such as the number of slots for performing slot aggregation) or a possible time OFDM symbol interval in which long PUCCH can be transmitted in a plurality of slots in which slot aggregation is configured, and the base station includes short PUCCH or long PUCCH between terminals. The downlink control channel may be transmitted to the terminal to avoid transmission resource collision. The downlink control channel may be common information to a group terminal or all terminals in a cell, or may be dedicated information transmitted only to a specific terminal.

In step 713, the base station receives an uplink control channel from the terminal in the short PUCCH or long PUCCH transmission time and frequency resources indicated in step 711 or 712 over a plurality of slots.

Next, the terminal procedure will be described.

In step 721, the terminal receives uplink control channel configuration information from the base station. The uplink control channel configuration information, as described with reference to FIG. 4 or 6, performs information required for possible aggregation or slot aggregation including at least one value of a frequency PRB resource of a long PUCCH or a short PUCCH or a time OFDM symbol interval. Number of slots) or a time OFDM symbol interval capable of transmitting a long PUCCH in a plurality of slots in which slot aggregation is configured, and in order to avoid short PUCCH or long PUCCH transmission resource collision between UEs, the UE may control uplink control channel configuration information. Can be received from the base station through an upper signal.

In step 722, the terminal receives a downlink control channel from the base station. The downlink control channel may be a bit field indicating a frequency PRB or time OFDM symbol interval of a short PUCCH or a long PUCCH or a start OFDM symbol and an end OFDM symbol or an OFDM symbol to avoid long PUCCH transmission as described in FIG. 4 or 6. It includes information required for slot aggregation (eg, the number of slots for performing slot aggregation) or a possible time OFDM symbol interval in which long PUCCH can be transmitted in a plurality of slots in which slot aggregation is configured, and a short PUCCH or long PUCCH transmission resource collision between terminals In order to avoid the UE may receive a downlink control channel. The downlink control channel may be common information to a group terminal or all terminals in a cell, or may be dedicated information transmitted only to a specific terminal.

In step 723, the UE transmits an uplink control channel to the base station in the short PUCCH or long PUCCH transmission time and frequency resources received in step 721 or step 722 over a plurality of slots.

8 is a diagram illustrating a base station apparatus according to the present invention.

The control unit 801 is a base station procedure according to Figs. 5 and 7 of the present invention and an uplink control channel according to a time and frequency transmission resource setting method according to the uplink control channel setting and the uplink control channel according to Figs. 4 and 6 of the present invention. Transmission resources are controlled and transmitted to the terminal through the 5G control information transmission device 805 and the 5G data transmission and reception device 807, the 5G data is scheduled by the scheduler 803 and the 5G terminal through the 5G data transmission and reception device 807. Send and receive 5G data.

9 is a diagram illustrating a terminal device according to the present invention.

5G control information receiving apparatus 905 according to the UE procedure according to FIGS. 5 and 7 of the present invention, the uplink control channel setting and the uplink control channel according to FIGS. 4 and 6 of the present invention, and a time and frequency transmission resource setting method Receives the uplink control channel transmission resource position from the base station through the 5G data transmission and reception device 906, the controller 901 and the 5G base station through the 5G data transmission and reception device 906 for the 5G data scheduled at the received resource location Send and receive

In addition, the embodiments disclosed in the specification and the drawings merely present specific examples to easily explain and easily understand the contents of the present invention, and are not intended to limit the scope of the present invention. Therefore, the scope of the present invention should be construed that all changes or modifications derived based on the technical spirit of the present invention are included in the scope of the present invention in addition to the embodiments disclosed herein.

Second Embodiment

In describing the embodiments herein, descriptions of technical contents that are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same or corresponding components in each drawing are given the same reference numerals.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments of the present invention make the disclosure of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

At this point, it will be understood that each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). It creates a means to perform the functions. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions for performing the processing equipment may also provide steps for performing the functions described in the flowchart block (s).

In addition, each block may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of order. For example, the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.

In this case, the term '~ part' used in the present embodiment refers to software or a hardware component such as an FPGA or an ASIC, and '~ part' performs certain roles. However, '~' is not meant to be limited to software or hardware. '~ Portion' may be configured to be in an addressable storage medium or may be configured to play one or more processors. Thus, as an example, '~' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and the 'parts' may be combined into a smaller number of components and the 'parts' or further separated into additional components and the 'parts'. In addition, the components and '~' may be implemented to play one or more CPUs in the device or secure multimedia card.

5G (5th generation), the next generation communication system after LTE (or evolved universal terrestrial radio access) and LTE-A (LTE-Advanced or E-UTRA Evolution) to handle the explosive growth of mobile data traffic There is an active discussion on systems or new radio access technology (NR). While traditional mobile communication systems focused on conventional voice / data communications, 5G systems support eMBB services, high reliability / ultra low latency (URLLC) services, and mass communication of things to improve existing voice / data communications. It aims to satisfy a variety of services and requirements, including massive machine type communication (MTC) services.

While the bandwidth of the system transmission bandwidth per single carrier of the existing LTE and LTE-A is limited to 20 MHz, 5G system aims at ultra-high speed data service of several Gbps using the much wider ultra wide bandwidth. . As a result, 5G systems consider ultra-high frequency bands ranging from several GHz up to 100 GHz, which are relatively easy to secure, as candidate frequencies. In addition, it considers securing wideband frequency for 5G system through frequency relocation or allocation among the frequency bands included in several hundred MHz to several GHz used in existing mobile communication systems.

The radio wave of the ultra-high frequency band is called a millimeter wave (mmWave) with a wavelength of several mm level. However, in the ultra-high frequency band, the pathloss of the radio wave increases in proportion to the frequency band, thereby reducing the coverage of the mobile communication system.

In order to overcome the shortcomings of the coverage reduction of the ultra-high frequency band, a beamforming technique that increases the reach of the radio wave by concentrating the radiated energy of the radio wave to a predetermined target point by using a plurality of antennas is important. . That is, the signal to which the beamforming technique is applied becomes relatively narrow in the beam width of the signal, and the radiation energy is concentrated in the narrowed beam width to increase the radio wave reaching distance. The beamforming technique may be applied to a transmitter and a receiver, respectively.

In addition to the coverage increase effect, the beamforming technique has an effect of reducing interference in a region other than the beamforming direction. In order for the beamforming technique to work properly, accurate measurement and feedback methods of the transmit and receive beams are required. The beamforming technique may be applied to a control channel or a data channel corresponding to one-to-one between a predetermined terminal and a base station. In addition, a common signal transmitted by a base station to a plurality of terminals in a system, for example, a synchronization signal, a physical broadcast channel (PBCH), a control channel and a data channel for transmitting system information. The beamforming technique may also be applied to increase coverage.

When the beamforming technique is applied to the common signal, a beam sweeping technique of changing the beam direction and transmitting the signal is additionally applied so that the common signal can reach a terminal existing at an arbitrary position in the cell. do.

Another requirement for 5G systems is the ultra-low latency service, which has a transmission delay of about 1ms. One way to reduce transmission delay is to design a short TTI (short TTI) based frame structure compared to LTE and LTE-A. TTI is a basic time unit for performing scheduling, and the TTI of the existing LTE and LTE-A systems is 1ms corresponding to the length of one subframe. For example, as a short TTI for satisfying the requirement for the ultra low delay service of the 5G system, 0.5 ms, 0.2 ms, 0.1 ms, etc., which are shorter than the existing LTE and LTE-A systems, are possible. Hereinafter, a frame structure of an LTE and LTE-A system will be described with reference to the drawings, and a design direction of a 5G system will be described.

FIG. 10 is a diagram illustrating a basic structure of a time-frequency resource region, which is a radio resource region in which data or control channels of LTE and LTE-A systems are transmitted.

In FIG. 10, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The uplink (UL) refers to a radio link through which a terminal transmits data or a control signal to a base station, and the downlink (DL) refers to a radio link through which a base station transmits data or a control signal to a terminal. The minimum transmission unit in the time domain of the LTE and LTE-A systems is an OFDM symbol for downlink and a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol for uplink, where Nsymb (1002) symbols are gathered. Slot 1006 and two slots are combined to form one subframe 1005. The length of the slot is 0.5ms and the length of the subframe is 1ms. The radio frame 1014 is a time domain unit consisting of 10 subframes. The minimum transmission unit in the frequency domain is a subcarrier of 15 kHz (subcarrier spacing = 15 kHz), and the bandwidth of the entire system transmission bandwidth is composed of a total of NBW 1004 subcarriers.

The basic unit of resource in the time-frequency domain may be represented by an OFDM symbol or an SC-FDMA symbol index and a subcarrier index as a resource element 1012 (RE). The resource block 108 (RB or Physical Resource Block; PRB) is defined as Nsymb 1002 contiguous OFDM symbols in the time domain or SC-FDMA symbols and NRB 1010 contiguous subcarriers in the frequency domain. . Thus, one RB 1008 is composed of Nsymb x NRB REs 1012.

In LTE and LTE-A systems, data is mapped in units of RBs, and the base station performs scheduling in units of RB-pairs configuring one subframe for a predetermined UE. The number of SC-FDMA symbols or the number of OFDM symbols Nsymb is determined according to the length of a cyclic prefix (CP) added for each symbol to prevent intersymbol interference. For example, if a general CP is applied, Nsymb = 7, an extended CP. Is applied, Nsymb = 6 The extended CP can be applied to a system having a relatively large propagation transmission distance than the general CP, thereby maintaining orthogonality between symbols.

The subcarrier spacing, CP length, etc. are essential information for OFDM transmission and reception, so that the BS and the UE recognize the common values as common values for smooth transmission and reception.

NBW and NRB are proportional to the bandwidth of the system transmission band. The data rate increases in proportion to the number of RBs scheduled to the terminal.

The frame structure of the LTE and LTE-A system as described above is a design in consideration of the conventional voice / data communication, and there is a scalability constraint to meet various services and requirements, such as 5G system. Therefore, in 5G system, it is necessary to define and operate the frame structure flexibly in consideration of various services and requirements.

11, 12, and 13 show an example of an expandable frame structure.

11, 12, and 13 exemplarily include a subcarrier spacing, a CP length, a slot length, and the like as an essential parameter set for defining an extended frame structure. In 5G systems, a basic time unit for performing scheduling is called a slot.

In the early years when 5G systems are introduced, at least coexistence with dual LTE / LTE-A systems or dual mode operation is expected. Through this, LTE / LTE-A can provide stable system operation, and 5G system can play a role of providing improved services. Accordingly, the extended frame structure of the 5G system needs to include at least the frame structure of LTE / LTE-A or a required parameter set.

FIG. 11 is a diagram illustrating a 5G frame structure or an essential parameter set, such as a frame structure of LTE / LTE-A.

Referring to FIG. 11, a frame structure type A may have a subcarrier spacing of 15 kHz, 14 symbols constitute a 1 ms slot, and a PRB may be configured with 12 subcarriers (= 180 kHz = 12 x 15 kHz).

12 is a frame structure type B, in which the frame structure type B has a subcarrier spacing of 30 kHz, 14 symbols constitute a 0.5 ms slot, and a PRB may be configured with 12 subcarriers (= 360 kHz = 12 × 30 kHz). That is, the subcarrier spacing and the PRB size of the frame structure type B are doubled, and the slot length and the symbol length are doubled, as compared to the frame structure type A.

FIG. 13 is a frame structure type C. The frame structure type C has a subcarrier spacing of 60 kHz, 14 symbols constitute a 0.25 ms subframe, and a PRB may be configured with 12 subcarriers (= 720 kHz = 12 × 60 kHz). That is, the subcarrier spacing and the PRB size of the frame structure type C are four times larger and the slot length and the symbol length are four times smaller than the frame structure type A.

In other words, when the frame structure type is generalized, the subcarrier spacing, CP length, slot length, etc., which are an essential parameter set, have an integer multiple of each other for each frame structure type, thereby providing high scalability. A subframe having a fixed length of 1 ms is defined to represent a reference time unit irrespective of the frame structure type. Thus, frame structure type A has one subframe composed of one slot, frame structure type B has one subframe composed of two slots, and frame structure type C has one subframe composed of four slots. It is composed.

The illustrated frame structure type can be applied in correspondence with various scenarios. In view of the cell size, since a longer CP length can support a larger cell, the frame structure type A can support a larger cell than the frame structures B and C. In view of the operating frequency band, the frame structure type C can support a relatively higher operating frequency than the frame structures type A and B because the larger the subcarrier interval, the better the phase noise recovery of the high frequency band. From the service point of view, since the shorter slot length, which is a basic time unit of scheduling, is advantageous to support an ultra low delay service such as URLLC, frame structure type C is more suitable for URLLC services than frame structure types A and B.

In addition, the multiple frame structure types may be multiplexed and integrated in one system.

Table 2 illustrates the interrelationship between the subcarrier spacing applied to the synchronization signal, the subcarrier spacing applied to the data channel or the control channel, and the frequency band in which the system operates, among the required parameter sets defining the extended frame structure. . The terminal performs time / frequency synchronization with the most suitable cell through cell search in an initial access step of accessing the system, and obtains system information from the corresponding cell. The synchronization signal is a signal for cell search, and a subcarrier spacing suitable for a channel environment such as phase noise is applied to each frequency band.

In the case of a data channel or a control channel, in order to support various services as described above, a subcarrier interval may be differently applied according to a service type. However, in the cell search step, it is necessary to minimize unnecessary terminal complexity increase before the UE performs data transmission and reception in earnest. Accordingly, the subcarrier interval applied to the synchronization signal is maintained at a single value in the frequency band in which the UE performs cell search.

According to the example of Table 2, in the frequency band A, the subcarrier interval applied to the synchronization signal is defined as a single value of 15 kHz, and the subcarrier interval applied to the data channel or the control channel is a plurality of values of 15, 30, and 60 kHz. define. In the frequency band B, the subcarrier interval applied to the synchronization signal is defined as a single value of 30 kHz, and the subcarrier interval applied to the data channel or the control channel is defined as a plurality of values of 15, 30, and 60 kHz.

The subcarrier interval to be actually applied to the data channel or the control channel may be notified by the base station to the terminal through higher layer signaling or physical layer signaling. In Table 2, it is assumed that the frequency bands A, B, C, and D are A <B <C <D.

14 illustrates a time domain mapping structure and a beam sweeping operation of a synchronization signal according to the present invention. For illustration purposes, the following components are defined.

Primary synchronization signal (PSS): A signal on which DL time or frequency synchronization is based.

Secondary synchronization signal (SSS): A reference for DL time or frequency synchronization and provides cell ID information. In addition, it may serve as a reference signal for demodulation of the PBCH.

-Physical broadcast channel (PBCH): Provides essential system information necessary for transmitting and receiving data channel and control channel of the terminal. The essential system information may include search space related control information indicating radio resource mapping information of a control channel, scheduling control information for a separate data channel for transmitting system information, and the like.

Synchronization signal block (SS block): The SS block is composed of N OFDM symbols and a combination of PSS, SSS, PBCH and the like. In the case of a system to which beam sweeping technology is applied, the SS block is the minimum unit to which beam sweeping is applied.

Synchronization signal burst: An SS burst is composed of one or more SS blocks. In the example of FIG. 14, each SS burst is composed of four SS blocks.

-SS burst set (synchronization signal burst set): consists of one or more SS bursts, a total of L SS blocks.

In the example of FIG. 14, the SS burst set includes 12 SS blocks in total. The SS burst set is repeated periodically in predetermined period P units. The period P is defined as a fixed value according to the frequency band, or the base station informs the terminal through signaling. If there is no separate signaling for the period P, the terminal applies a default value promised in advance.

14 shows that beam sweeping is applied in units of SS blocks over time.

In the example of FIG. 14, UE 1 1405 receives the SS block as a beam radiated in the direction of # d0 1403 by beam popping applied to SS block # 0 at 1401. Terminal 2 1406 receives the SS block as a beam radiated in the # d4 1404 direction by beam popping applied to SS block # 4 at 1402. The terminal may obtain an optimal synchronization signal through a beam emitted from the base station in the direction in which the terminal is located. For example, the terminal 1 1405 is difficult to obtain time / frequency synchronization and essential system information from the SS block through the beam radiated in the # d4 direction away from the position of the terminal 1.

15 shows a configuration example of an SS block. SS block is composed of N OFDM symbols, Figure 15 (a) is 4 OFDM symbols, Figure 15 (b) 3 OFDM symbols, Figure 15 (c) shows an example in which the SS block is composed of 2 OFDM symbols. .

Referring to FIG. 15A, in the SS block including 4 OFDM symbols, PSS and SSS are mapped to 1 OFDM symbol in a time division multiplexing scheme in the time domain, and PBCH is mapped to 2 OFDM symbols. Mapped. As a modified example, PSS, SSS, and PBCH may each be mapped to 1 OFDM symbol, and a tertiary synchronization signal (TSS) indicating a time index of the SS block may be mapped to 1 OFDM symbol.

Referring to FIG. 15B, in the SS block including 3 OFDM symbols, PSS, SSS, and PBCH are mapped to 1 OFDM symbol in a TDM scheme, respectively. As a modified example, the PSS and the SSS may be mapped to one OFDM symbol, and the TSS may be multiplexed and mapped to the OFDM symbol to which the PBCH is mapped in a frequency division multiplexing (FDM) scheme in the PBCH and the frequency domain.

Referring to FIG. 15C, in the SS block including 2 OFDM symbols, PSS and SSS are mapped to 1 OFDM symbol in a TDM scheme, respectively. In the case of FIG. 15 (c), the UE is required for a non-stand alone cell in a manner applicable to a non-stand alone cell operating in dependent mode by combining with a primary cell (Pcell or anchor cell). Essential system information can be obtained through signaling of the primary cell. The signaling of the primary cell may include control information on how the SS block configuration of the non-stand alone cell is included, for example, whether or not PBCH is included.

In addition, various modified mapping positions other than the mapping positions in the SS blocks of the PSS, SSS, and PBCH illustrated in FIG. 15 are possible.

As a method for achieving ultra-low latency service in 5G system, in addition to the above-described method of operating the extended frame structure, downlink data transmission and downlink data are transmitted in a slot, which is a basic unit for scheduling. A 'self-contained' transmission scheme in which HARQ-ACK / NACK feedback is performed is being studied. In addition, 'self-contained' transmission in terms of uplink data transmission refers to a method in which scheduling information transmission of a base station scheduling uplink data of a terminal and uplink data transmission of a corresponding terminal are performed in the same slot.

Hereinafter, at least six slot formats (slot format 1 to slot format 6) required to support 'self-contained' transmission will be described with reference to FIG. 16. In the example of FIG. 16, each slot represents a total of 14 symbols. And a symbol 1607 for transmitting downlink control information, a symbol 1608 for transmitting downlink data, a symbol 1609 for guard period (GP) for downlink-uplink switching, and a symbol for transmitting uplink data Each slot format may be defined by a combination of symbols 1610 and 1616 for transmitting uplink control information. The symbols constituting each slot format may be configured in various combinations according to the amount of information of control information to be transmitted, the amount of information of data to be transmitted, or the time required for the terminal to change the RF module from downlink to uplink. Can be. The base station may inform the terminal of the control information on which format of the slot format to apply through signaling.

Slot format 1 1601, slot format 2 1602, and slot format 3 1603 are slot formats for downlink data transmission.

Slot format 1 1601 is a slot including at least one symbol for transmitting downlink control information and at least one symbol for transmitting downlink data, and all symbols are used for downlink transmission.

Slot format 2 1602 is a symbol for transmitting at least one downlink control information, a symbol for transmitting at least one downlink data, at least one symbol for GP, and a symbol for transmitting at least one uplink control information. As a slot configured, the downlink transmission symbol and the uplink transmission symbol coexist in one slot. Therefore, the slot format 2 may support the downlink 'self-contained' transmission scheme.

Slot format 3 (1603) is characterized in that all symbols consist of symbols for downlink data transmission. Therefore, slot format 3 can maximize downlink data transmission efficiency by minimizing overhead for transmitting control information.

Slot format 4 (1604), slot format 5 (1605), and slot format 6 (1606) are slot formats for uplink data transmission.

Slot format 4 1604 is a slot including at least one symbol for transmitting downlink control information, at least one symbol for GP, and at least one symbol for uplink data transmission. That is, since the downlink transmission symbol and the uplink transmission symbol coexist in one slot, the uplink 'self-contained' transmission scheme can be supported through slot format 4.

Slot format 5 1605 is a symbol for transmitting at least one downlink control information, at least one symbol for GP, a symbol for transmitting at least one uplink data, and a symbol for transmitting at least one uplink control information. The slot is configured. That is, since the downlink transmission symbol and the uplink transmission symbol coexist in one slot, the downlink 'self-contained' transmission scheme can be supported through the slot format 5.

Slot format 6 1606 is characterized in that all symbols consist of symbols for uplink data transmission. Therefore, slot format 6 can maximize uplink data transmission efficiency by minimizing overhead for transmitting control information.

The time domain mapping of the SS block is affected by the extended frame structure, whether or not beam sweeping is applied, and a 'self-contained' transmission scheme.

17 illustrates various methods of mapping an SS block within one slot.

Referring to FIG. 17, 1700, and FIGS. 17A, 17B, and 17C illustrate a method of mapping three SS blocks in units of four symbols in a slot composed of 14 symbols.

(D), (e), (f), (g), (h), (i), (j), (k), and (l) of FIG. 17 are provided in units of four symbols in a slot composed of 14 symbols. A method of mapping two SS blocks is shown.

(M), (n), (o), and (p) of FIG. 17 illustrate a method of mapping one SS block in units of 4 symbols in a slot composed of 7 symbols.

Downlink control information, downlink data, uplink control information, uplink data, GP, etc. may be mapped to a symbol to which the SS block is not mapped in one slot.

18 shows another method of mapping an SS block in one slot.

Referring to FIG. 18, (1800) and (a), (b), and (c) of FIG. 18 illustrate a method of mapping four SS blocks in units of three symbols in a slot composed of 14 symbols.

(D), (e), (f), (g), (h), (i), (j), and (k) of FIG. 18 show three SS blocks in units of three symbols in a slot composed of 14 symbols. Indicates how to map.

(L), (m), and (n) of FIG. 18 show a method of mapping two SS blocks in units of three symbols in a slot composed of seven symbols.

As in the case of FIG. 17, downlink control information, downlink data, uplink control information, uplink data, GP, etc. may be mapped to a symbol to which the SS block is not mapped in one slot.

17 and 18 illustrate various methods of mapping an SS block in one slot, it is necessary to define a fixed mapping pattern promised between the terminal and the base station in order to reduce the SS block detection complexity of the terminal.

As described in Table 2, the subcarrier spacing applied to the synchronization signal for each frequency band may be defined as a single value, and the subcarrier spacing applied to the data channel or the control channel may be defined as a plurality of values.

In the initial access step in which the UE performs cell search through SS block detection, it is a step before the UE performs data transmission and reception in full, and when a plurality of subcarrier intervals are applied to the data channel or the control channel as described above, It is not clear which subcarrier spacing is applied to the actual data channel or control channel in. Therefore, when the time domain mapping of the SS block is defined based on the subcarrier spacing criteria of the data channel or the control channel, a complexity occurs in that the UE assumes all subcarrier intervals and performs the SS block detection operation. 19 illustrates a slot structure according to a case in which subcarrier intervals applied to a data channel or a control channel are 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz, respectively. Suppose we define the time domain mapping of the SS block to map from OFDM symbol # 4 in the slot,

If the subcarrier spacing applied to the data channel or the control channel is 15 kHz, the SS block is mapped from 1901,

If the subcarrier spacing applied to the data channel or control channel is 30 kHz, the SS block is mapped from 1902,

If the subcarrier spacing applied to the data channel or control channel is 60 kHz, the SS block is mapped from 1902,

If the subcarrier spacing applied to the data channel or control channel is 120 kHz, then the SS block is mapped from 1904,

If the subcarrier spacing applied to the data channel or control channel is 240 kHz, the SS block is mapped from 1905.

That is, the UE has a problem of increasing complexity of finding the mapping position of the SS block in consideration of all subcarrier intervals applied to the data channel or the control channel supported by the frequency band in which cell search is attempted.

In order to solve the problem of the terminal complexity increase as described above, the 'frame structure of the data channel or control channel' and the 'synchronous signal frame structure' is separated and the SS block 'regardless of the' frame structure of the data channel or control channel ' To a fixed position according to the synchronization signal frame structure. Hereinafter, the main contents of the present invention will be described with reference to FIGS. 20, 21, 22, and 23.

20 shows a subcarrier spacing applied to a synchronization signal of 15 kHz, and a subcarrier spacing applied to a data channel or a control channel is 15 kHz (FIG. 20 (a)), 30 kHz (FIG. 20 (b)), 60 kHz ( The case of (c) of FIG. 20 is shown.

According to the example of Table 2, when the terminal performs a cell search in the frequency band A, the terminal is applied to the synchronization signal irrespective of the subcarrier interval 15, 30, 60 kHz applicable to the data channel or the control channel Notice that the interval is fixed at 15 kHz. The time domain mapping of the SS block is applied based on the 'synchronous signal frame structure'. The symbol length constituting the 'synchronous signal frame structure' is determined by 15 kHz, which is a subcarrier interval applied to the synchronization signal. The SS slot, which is a slot of the 'synchronous signal frame structure', has the largest value among the slot lengths supported by the 'frame structure of the data channel or control channel' in the frequency band A. Accordingly, the length of the SS slot of the 'synchronous signal frame structure' includes all of the slot lengths of the 'frame structure of the data channel or control channel', and the common SS block regardless of the 'frame structure of the data channel or control channel'. Enable mapping. This may be expressed as Equation 1 below.

<Equation 1>

SS slot length of synchronous signal frame structure = max {slot length of frame structure of data channel or control channel}

For example, in the case of 'frame structure of the data channel or control channel', the slot length of 'frame structure of the data channel or control channel' is as follows.

-'Frame structure of data channel or control channel' with 15kHz subcarrier spacing-> Slot length 1ms

-"Frame structure of data channel or control channel" with 30kHz subcarrier spacing-> 0.5ms slot length

-'Frame structure of data channel or control channel' with subcarrier spacing 60kHz-> slot length 0.25ms

Accordingly, the length of the SS slot of the 'synchronous signal frame structure' is determined to be the maximum slot length of 1 ms of the 'frame structure of the data channel or control channel'. According to the 'synchronous signal frame structure', 1ms SS slot is composed of 14 symbols.

Assuming an SS block consisting of four symbols, SS blocks # 0, # 1, and # 2 are denoted by reference numerals 2001, 2002, 2003 (or reference numerals 2004, 2005, 2006). Or reference numerals (2007), (2008) and (2009)) in order, and this corresponds to a common position regardless of the frame structure of the data channel / control channel. For example, the position to which the SS block # 0 is mapped is a reference number 2001 of FIG. 20A and a reference number 2004 of FIG. 20B regardless of the frame structure of the data channel / control channel. ), It is determined as a fixed position with respect to the predetermined reference time point 2014 by reference numeral 2007 of FIG. 2K (c).

When a base station transmits a downlink control channel or a data channel to a terminal or receives an uplink control channel or a data channel from a terminal during a time interval in which the mapping structure of the SS block is applied, the SS block is as follows. Conflicts with the transmission can be avoided.

Method 1: A base station or a terminal performs transmission and reception of a data channel or a control channel in a frequency domain that does not overlap the bandwidth 2011 occupied by the SS block. Accordingly, the base station operates by setting a search space for determining radio resource mapping of the downlink control channel differently depending on whether the SS block is transmitted or not. That is, in the time interval in which the SS block is transmitted, the search space is mapped to a frequency domain that does not overlap the bandwidth occupied by the SS block. Accordingly, the terminal detects the downlink control channel in the frequency domain that does not overlap the bandwidth occupied by the SS block in the time interval in which the SS block is transmitted. The information about the search space uses a preset setting between the base station and the terminal, or the base station informs the terminal through signaling.

Method 2: The base station or the terminal places the SS block transmission at a high priority and does not transmit or receive a data channel or a control channel in a section where the SS block and the transmission time point overlap.

Method 3: In order to reduce scheduling constraints of the base station in the SS slot in which the SS block is transmitted, a minimum downlink signal transmission interval and an uplink signal transmission interval are defined, and an SS block that does not overlap the corresponding time interval is transmitted. For example, priority is given to a potential symbol location (2012) in which the downlink control channel can be transmitted or a potential symbol location (GP) of the GP or to a potential symbol location (2013) in which the uplink control channel can be transmitted. An SS block overlapping with is defined as an invalid SS block. The base station does not transmit the invalid SS block, but transmits the valid SS block to the terminal. In addition, a downlink signal or an uplink signal in which an invalid SS block and a transmission time point overlap is allowed for transmission.

20 limits the potential symbol location 2012 where the downlink control channel can be transmitted to two symbols within a slot according to a 'data channel or control channel frame structure', and is either a potential symbol location of the GP or an uplink An example of limiting the potential symbol location 2013 to which the control channel can be transmitted is 2 symbols.

In this case, SS block # 0 in the example of FIG. 20 (a), SS block # 0 in the example of FIG. 20 (b), SS block # 1 in the example of FIG. 20 (c), SS block # 0, in the example of FIG. SS block # 1 and SS block # 2 correspond to an invalid SS block, respectively. In the case of FIG. 20C, since there is no valid SS block in the SS slot, it is necessary to accept transmission / reception constraints of the downlink control channel or the uplink control channel and to allow transmission of at least one SS block.

21 shows that the subcarrier spacing applied to the synchronization signal is 30 kHz, and the subcarrier spacing applied to the data channel or control channel is 15 kHz (FIG. 21 (a)), 30 kHz (FIG. 21 (b)), 60 kHz ( The case of (c) of FIG. 2L is shown.

According to the example of Table 2, when the terminal performs a cell search in the frequency band B, the terminal is applied to the synchronization signal irrespective of the subcarrier interval 15, 30, 60 kHz applicable to the data channel or the control channel Notice that the interval is fixed at 15 kHz. The time domain mapping of the SS block is applied based on the 'synchronous signal frame structure'. The symbol length constituting the 'synchronous signal frame structure' is determined by 30 kHz, which is a subcarrier interval applied to the synchronization signal. The SS slot, which is a slot of the 'synchronous signal frame structure', has the largest value among the slot lengths supported by the 'frame structure of the data channel or control channel' in the frequency band B. In the case of FIG. 21, the length of the SS slot of the 'synchronous signal frame structure' is defined as the maximum slot length of 1 ms of the 'frame structure of the data channel or control channel'. Therefore, according to the 'synchronous signal frame structure', 1ms SS slot is composed of 28 symbols.

Assuming an SS block consisting of four symbols, SS blocks # 0, # 1, # 2, # 3, # 4, # 5, and # 6 may be mapped during SS slot 1 ms, which is called a 'data channel or a control channel. The frame structure of 'regardless of the common location.

For example, the position to which the SS block # 0 is mapped is a reference number 2102 of FIG. 21A and a reference number 2103 of FIG. 21B regardless of the frame structure of the data channel or the control channel. ), It is determined as a fixed position with respect to the predetermined reference time 2105 by reference numeral 2104 of FIG.

The method described with reference to FIG. 20 when a base station transmits a downlink control channel or a data channel to a terminal or receives an uplink control channel or a data channel from a terminal during a time interval in which the mapping structure of the SS block is applied. 1, Method 2, Method 3 may be applied.

FIG. 21 specifically illustrates, in the case of method 3, the potential symbol location 2106 where the downlink control channel can be transmitted in the slot according to the 'data channel or control channel frame structure' is limited to 2 symbols. An example of limiting a potential symbol position 2107 to a potential symbol position 2107 to which an uplink control channel can be transmitted is shown. Therefore, except for an invalid SS block, in the example of FIG. 21A, SS block # 1, # 2, # 3, # 4, # 5, and in the example of FIG. 21B, SS block # 1, In the example of SS block # 2, SS block # 4, SS block # 5, and (c) of FIG. 2L, SS block # 2 and SS block # 4 correspond to valid SS blocks, respectively.

SS blocks # 2 and # 4 correspond to a common valid SS block regardless of the data channel or control channel frame structure. The base station does not transmit the invalid SS block, but transmits the valid SS block to the terminal. In addition, a downlink signal or an uplink signal in which an invalid SS block and a transmission time point overlap is allowed for transmission.

The invalid SS block may be included as an additional invalid SS block in the following cases.

When SS blocks are mapped across slot boundaries according to the 'data channel or control channel frame structure': Even if the 'data channel or control channel frame structure' changes in time, it is necessary for consistent SS block mapping. In the example of (b) of FIG. 21, it corresponds to the SS block # 3, and the SS blocks # 1, # 3, and # 5 in the example of (c) of FIG. 2L.

-When the transmission interval of the SS block overlaps the first symbol located every 0.5 ms according to the 'data channel or control channel frame structure': For synchronizing symbol timing between different 'data channel or control channel frame structures', The symbol length of the first symbol located every 0.5 ms for each 'data channel or control channel frame structure' is defined differently from the other symbols.

Accordingly, in this case, it is necessary to designate an invalid SS block so that the SS block length can be kept consistent. In the examples of FIGS. 21A, 21B, and 21C, respectively, these correspond to SS blocks # 0 and # 3.

22 shows that the subcarrier spacing applied to the synchronization signal is 120 kHz, and the subcarrier spacing applied to the data channel or the control channel is 60 kHz (FIG. 22A), 120 kHz (FIG. 22B), 240 kHz ( The case of (c) of FIG. 22 is shown.

According to the example of Table 2, when the terminal performs a cell search in the frequency band C, the terminal is applied to the synchronization signal irrespective of the subcarrier interval 60, 120, 240 kHz applicable to the data channel or the control channel Notice that the interval is fixed at 120 kHz. The time domain mapping of the SS block is applied based on the 'synchronous signal frame structure'. The symbol length constituting the 'synchronous signal frame structure' is determined by 120 kHz, which is a subcarrier interval applied to the synchronous signal. The SS slot, which is a slot of the 'synchronous signal frame structure', has the largest value among the slot lengths supported by the 'frame structure of the data channel or control channel' in the frequency band C. In the case of FIG. 22, the length of the SS slot of the 'synchronous signal frame structure' is defined as a maximum slot length of 0.25 ms of the 'frame structure of the data channel or control channel'. Therefore, according to the 'synchronous signal frame structure', a 0.25ms SS slot is composed of 28 symbols.

Assuming an SS block consisting of four symbols, SS blocks # 0, # 1, # 2, # 3, # 4, # 5, and # 6 may be mapped for SS slot 0.25 ms, which is called 'data channel or control'. It corresponds to a common position regardless of the 'frame structure of the channel'. For example, the position to which the SS block # 0 is mapped is shown in FIG. 22A of FIG. 22A, reference numeral 2203 of FIG. 2L (B), and FIG. Reference numeral 2204 of 2l (c) is determined to be a fixed position relative to the predetermined reference time point 2205.

The method described with reference to FIG. 20 when a base station transmits a downlink control channel or a data channel to a terminal or receives an uplink control channel or a data channel from a terminal during a time interval in which the mapping structure of the SS block is applied. 1, Method 2, and Method 3 can be applied.

FIG. 22 specifically illustrates, in the case of method 3, the potential symbol location 2206 where the downlink control channel can be transmitted in the slot according to the 'data channel or control channel frame structure' is limited to 2 symbols. An example of limiting the potential symbol position or the potential symbol position 2207 to which an uplink control channel can be transmitted is 2 symbols.

Accordingly, in the example of FIG. 22A, SS block # 1, # 2, # 3, # 4, # 5, and in the example of FIG. 22B, SS block # 1, SS block # 2, SS block # 4 In the example of SS block # 5 and FIG. 22C, SS block # 2 and SS block # 4 correspond to valid SS blocks. SS blocks # 2 and # 4 correspond to a common valid SS block regardless of the 'data channel / control channel frame structure'. The base station does not transmit the invalid SS block, but transmits the valid SS block to the terminal. In addition, a downlink signal or an uplink signal in which an invalid SS block and a transmission time point overlap is allowed for transmission.

23 shows a subcarrier spacing applied to a synchronization signal of 240 kHz, and a subcarrier spacing applied to a data channel or a control channel is 60 kHz (FIG. 23 (a)), 120 kHz (FIG. 23 (b)), 240 kHz ( The case of (c) of FIG. 23 is shown.

According to the example of Table 2, when the terminal performs a cell search in the frequency band D, the terminal is applied to the synchronization signal irrespective of the subcarrier interval 60, 120, 240 kHz applicable to the data channel or the control channel Note that the subcarrier spacing is fixed at 240 kHz. The time domain mapping of the SS block is applied based on the 'synchronous signal frame structure'. The symbol length constituting the 'synchronous signal frame structure' is determined by 240 kHz, which is a subcarrier interval applied to the synchronous signal. The SS slot, which is a slot of the 'synchronous signal frame structure', has the largest value among the slot lengths supported by the 'frame structure of the data channel or control channel' in the frequency band D. In the case of FIG. 23, the length of the SS slot of the 'synchronous signal frame structure' is defined as the maximum slot length of 0.25 ms of the 'frame structure of the data channel or control channel'. Accordingly, according to the 'synchronous signal frame structure', a 0.25ms SS slot is composed of 56 symbols.

Assuming an SS block consisting of 4 symbols, SS blocks # 0, # 1, # 2, # 3, # 4, # 5, # 6, # 7, # 8, # 9, # 10 for SS slot 0.25 ms , # 11, # 12, and # 13 may be mapped, which corresponds to a common position regardless of the 'frame structure of the data channel or the control channel'.

For example, the position to which the SS block # 0 is mapped is referred to by reference numeral 2302 of FIG. 23A and reference numeral 2303 of FIG. 23B regardless of the 'frame structure of the data channel or the control channel'. ), It is determined as a fixed position with respect to the predetermined reference time point 2305 by reference numeral 2304 of FIG.

The method described with reference to FIG. 20 when a base station transmits a downlink control channel or a data channel to a terminal or receives an uplink control channel or a data channel from a terminal during a time interval in which the mapping structure of the SS block is applied. 1, Method 2, Method 3 may be applied.

23 specifically illustrates, in the case of method 3, the potential symbol location 2306 to which the downlink control channel can be transmitted in the slot according to the 'data channel or control channel frame structure' is limited to 2 symbols. An example of limiting a potential symbol location 2307 to a potential symbol location 2307 in which an uplink control channel can be transmitted is shown. Therefore, in the example of FIG. 23A, the SS block # 2, # 3, # 4, # 5, # 6, # 7, # 8, # 9, # 10, # 11, and the example of (b) of FIG. In the example of SS block # 1, # 2, # 3, # 4, # 5, # 8, # 9, # 10, # 11, # 12, and (c) of FIG. 23, SS block # 1, # 2, # 4, # 5, # 8, # 9, # 11, and # 12 correspond to valid SS blocks, respectively. SS blocks # 2, # 4, # 5, # 8, # 9, # 11, and # 12 correspond to a common valid SS block regardless of the data channel or control channel frame structure. The base station does not transmit the invalid SS block, but transmits the valid SS block to the terminal. In addition, a downlink signal or an uplink signal in which an invalid SS block and a transmission time point overlap is allowed for transmission.

24A-24B illustrate the mapping location of an SS block within the period of the SS burst set.

FIG. 24A illustrates a case in which a subcarrier interval applied to a synchronization signal is 15 kHz and a subcarrier interval applied to a data channel or a control channel is 15 kHz, 30 kHz, and 60 kHz, respectively. For example, if the period of the SS burst set is 10ms and the SS block is composed of 4 symbols, the 10ms time interval is composed of up to 10 SS slots and up to 35 SS blocks.

In this case, from the start point of the SS burst set period is sequentially mapped from SS block # 0 in ascending order, the following method is possible.

Method A: Index for the maximum configurable SS block within SS burst set period. In the example of FIG. 24A, indexes from SS block # 0 to SS block # 34 may be indexed.

Method B: Index for valid SS blocks within SS burst set period. That is, the invalid SS block described above may be excluded from SS block indexing.

24B illustrates a case in which the subcarrier interval applied to the synchronization signal is 30 kHz (2420) and the subcarrier interval applied to the data channel or the control channel is 15 kHz, 30 kHz, and 60 kHz, respectively. For example, if the period of the SS burst set is 10ms and the SS block is composed of 4 symbols, the 10ms time interval is composed of up to 10 SS slots and up to 70 SS blocks.

25 illustrates another method of mapping an SS block within a period of an SS burst set.

FIG. 25A illustrates a case in which the subcarrier spacing applied to the synchronization signal is 120 kHz 2510 and the subcarrier spacing applied to the data channel or the control channel is 60 kHz, 120 kHz, and 240 kHz, respectively. For example, if the period of the SS burst set is 10ms and the SS block is composed of 4 symbols, the 10ms time interval is composed of up to 40 SS slots and up to 280 SS blocks.

FIG. 25B illustrates a case in which a subcarrier interval applied to a synchronization signal is 240 kHz 2520 and a subcarrier interval applied to a data channel or a control channel is 60 kHz, 120 kHz, and 240 kHz, respectively. For example, if the period of the SS burst set is 10ms and the SS block is composed of 4 symbols, the 10ms time interval is composed of up to 40 SS slots and up to 560 SS blocks.

The specific mapping position of each signal constituting the SS block may be expressed as follows.

For example, when the SS block is composed of 4 symbols, and the SS block is configured in the order of PSS, SSS, PBCH first symbol, and PBCH second symbol, each symbol satisfies the following conditions in the SS block. Define to map to a location.

PSS Symbol Mapping Location: Maps the PSS to a symbol location that satisfies the symbol index% 4 = 0 according to the 'synchronous signal frame structure'.

SSS symbol mapping position: SSS is mapped to a symbol position satisfying the symbol index% 4 = 1 according to the 'synchronous signal frame structure'.

PBCH first symbol mapping position: Maps the first PBCH symbol to a symbol position satisfying the symbol index% 4 = 2 according to the 'synchronous signal frame structure'.

PBCH second symbol mapping position: Maps the second PBCH symbol to a symbol position satisfying the symbol index% 4 = 3 according to the 'synchronous signal frame structure'.

In the above equation, A% B means the remaining value obtained by dividing A by B.

FIG. 26 illustrates a process until a terminal receives an SS block and switches to a connected mode through an initial access procedure.

In the initial access step in which the terminal accesses the system, the terminal first scans an RF channel supported by the terminal through cell search (step 2601). As described in Table 2, the terminal detects the corresponding synchronization signal according to the subcarrier interval of the synchronization signal defined for each frequency band. As described above, the terminal attempts to detect the sync signal at a location where the sync signal can be mapped.

The cell search procedure may proceed sequentially for each RF channel or simultaneously search for a plurality of RF channels according to the implementation of the terminal. In step 2602, the UE selects a cell that satisfies cell selection criteria based on the search result. As an example of the cell selection criteria, the terminal selects a cell having the largest signal strength where the reception strength of the synchronization signal exceeds a predetermined threshold. In step 2603, the UE synchronizes time / frequency synchronization with respect to the selected cell and acquires a cell ID. The terminal may additionally obtain a beam ID. In step 2604, the terminal receives the system information to obtain basic information for performing communication with the base station. Part of the system information is transmitted through the PBCH, and the other part is transmitted through the data channel for system information transmission. In step 2605, the UE adjusts uplink time / frequency synchronization through a random access procedure. Upon successful completion of the random access procedure, the UE transitions the link with the base station from the idle state to the connected state in step 2606 and completes preparation for data transmission and reception with the base station.

As described above, in the initial access step, the UE may not be clear which subcarrier interval is applied to the data channel or the control channel. That is, the configuration information on the 'data channel or control channel frame structure' may be obtained after successfully entering the access state by completing random access. Accordingly, the terminal may proceed differently according to the terminal state for detecting a valid SS block.

27 is a diagram illustrating an SS block detection procedure according to a connection state of a terminal.

That is, when the connected state 2701 of the terminal is in the idle state, the terminal assumes the maximum SS block and attempts to detect the SS block (step 2702).

If the terminal acquires configuration information on the 'data channel or control channel frame structure' as the connection state of the terminal, the terminal configures the obtained 'data channel or control channel frame structure' when the SS block is detected. SS block detection is attempted for a valid SS block considering information (step 2703). Therefore, in the case of the connected terminal, unnecessary SS block detection operation can be minimized to obtain a terminal power consumption reduction effect.

28 illustrates a terminal transceiver according to the present invention. For convenience of description, devices not directly related to the present invention will not be shown and described.

Referring to FIG. 28, the terminal includes a transmitter 2804, a downlink receive processing block 2805, and a demultiplexer 2806 including an uplink transmit processing block 2801, a multiplexer 2802, and a transmit RF block 2803. ), It is composed of a receiving unit 2808 and a control unit 2809 composed of a receiving RF block 2807.

As described above, the controller 2809 determines whether the terminal successfully completes the random access procedure of the terminal, the terminal state (idle or connected state), and the like, respectively, with the respective building blocks of the receiver 2808 for receiving the SS block signal. Each component block of the transmitter 2804 for uplink signal transmission is controlled.

The uplink transmission processing block 2801 in the transmitter 2804 of the terminal generates a signal to be transmitted by performing a process such as channel coding and modulation. The signal generated in the uplink transmission processing block 2801 is multiplexed with another uplink signal by the multiplexer 2802 and then signaled in the transmit RF block 2803 and then transmitted to the base station.

The receiving unit 2808 of the terminal demultiplexes a signal received from the base station and distributes the signal to each downlink receiving processing block. The downlink reception processing block 2805 performs demodulation, channel decoding, and the like on the downlink signal of the base station to obtain control information or data transmitted by the base station. The terminal receiver 2808 supports the operation of the controller 2809 by applying an output result of the downlink reception processing block to the controller 2809.

On the other hand, the present specification and the drawings have been described with respect to the preferred embodiments of the present invention, although specific terms are used, it is merely used in a general sense to easily explain the technical details of the present invention and help the understanding of the invention, It is not intended to limit the scope of the invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein. In addition, each of the above embodiments can be combined with each other if necessary to operate.

Third Embodiment

The wireless communication system has moved away from providing the initial voice-oriented service, for example, 3GPP high speed packet access (HSPA), LTE (or E-UTRA), LTE-A, LTE-Pro, 3GPP2 HRPD (high Evolving into broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards such as rate packet data (UMB), ultra mobile broadband (UMB), and IEEE 802.16e.

As a representative example of the broadband wireless communication system, the LTE system adopts the OFDM scheme in downlink (DL) and the single carrier frequency division multiple access (SC-FDMA) scheme in uplink (UL). Uplink refers to a radio link through which a user equipment (UE) or mobile station (MS) transmits data or control signals to a base station (eNode B or base station (BS)), and downlink refers to a base station connected to a user equipment. Refers to a radio link transmitting data or control signals.

In the multiple access scheme as described above, data or control information of each user is classified by assigning and operating such that time-frequency resources for carrying data or control information for each user do not overlap each other, that is, orthogonality is established. do.

As a future communication system after LTE, that is, a 5G communication system should be able to freely reflect various requirements such as users and service providers, so that services satisfying various requirements must be supported at the same time. Services considered for 5G communications systems include enhanced mobile broadband communications (eMBB), large-scale mechanical communications (mMTC), and ultra-reliable low latency communications (URLLC).

eMBB aims to provide a higher data rate than the data rate supported by LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, an eMBB should be able to provide a maximum data rate of 20 Gbps in downlink and a maximum data rate of 10 Gbps in uplink from one base station perspective. In addition, the 5G communication system must provide a maximum transmission rate and at the same time provide an increased user perceived data rate of the terminal. In order to meet these requirements, there is a need for improvement of various transmission / reception technologies including more advanced multi-input multi-output (MIMO) transmission technology. In addition, while transmitting signals using the maximum 20MHz transmission bandwidth in the 2GHz band used by current LTE, 5G communication system uses a frequency bandwidth wider than 20MHz in the frequency band of 3-6GHz or 6GHz or more, which is required by 5G communication system. It can satisfy the data transmission rate.

At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. In order to efficiently provide the Internet of Things, the mMTC requires large terminal access in a cell, improved terminal coverage, improved battery time, and reduced terminal cost. Since the IoT is attached to various sensors and various devices to provide a communication function, it must be able to support a large number of terminals (eg, 1,000,000 terminals / km 2) in a cell. In addition, since the terminal supporting the mMTC is likely to be located in a shaded area that the cell does not cover, such as the basement of the building, more coverage is required than other services provided by the 5G communication system. The terminal supporting the mMTC should be configured as a low-cost terminal, and because it is difficult to replace the battery of the terminal frequently, a very long battery life time (10-15 years) is required.

Finally, in the case of URLLC, it is a cellular-based wireless communication service used for a mission-critical purpose. For example, remote control for robots or machinery, industrial automation, unmaned aerial vehicles, remote health care, emergency situations Consider a service used for an emergency alert. Therefore, the communication provided by URLLC should provide very low latency and very high reliability. For example, a service that supports URLLC must meet air interface latency of less than 0.5 milliseconds, and at the same time have a requirement of a packet error rate of 10-5 or less. Therefore, for services supporting URLLC, the 5G system must provide a smaller transmission time interval (TTI) than other services, and at the same time, a design requirement for allocating a wider resource in the frequency band to secure the reliability of the communication link is required. .

Three services of 5G, eMBB, URLLC, and mMTC can be multiplexed and transmitted in one system. In this case, different transmission / reception techniques and transmission / reception parameters may be used between services to satisfy different requirements of respective services.

Frame structure of the LTE and LTE-A system is the same as described in Figure 1, it will be omitted below.

Next, downlink control information (DCI) in LTE and LTE-A systems will be described in detail.

In the LTE system, scheduling information for downlink data or uplink data is transmitted from the base station to the terminal through the DCI. DCI is defined in various formats and applied whether scheduling information for uplink data or scheduling information for downlink data, whether it is a compact DCI with a small size of control information, and spatial multiplexing using multiple antennas. DCI format determined according to whether or not, or whether the DCI for power control. For example, the content of information included in DCI format 1, which is scheduling control information for downlink data, is the same as described above, and will be omitted below.

A cyclic redundancy check (CRC) is attached to the DCI message payload, and the CRC is scrambled with a radio network temporary identifier (RNTI) corresponding to the identity of the terminal.

Different RNTIs are used according to the purpose of the DCI message, for example, UE-specific data transmission, power control command or random access response. In other words, the RNTI is not explicitly transmitted but is included in the CRC calculation process. Upon receiving the DCI message transmitted on the PDCCH, the UE checks the CRC using the allocated RNTI, and if the CRC check result is correct, it can be seen that the message is transmitted to the UE.

Next, a resource allocation (RA) method for PDSCH of LTE and LTE-A systems will be described in detail.

LTE supports resource allocation schemes (resource allocation type 0, resource allocation type 1, and resource allocation type 2) for three types of PDSCH.

가 된다. RBG당 RB 수, 즉 P 값이 작을수록 스케줄링의 유연성이 커지게 되는 장점이 있고 반면에 제어 시그널링 오버헤드가 증가하는 단점이 있다. 따라서 P 값은 충분한 자원할당의 유연성을 유지하면서도 요구되는 비트 수를 줄일 수 있도록 적절히 선택되어야 한다. In resource allocation type 0, non-contiguous RB allocation is supported on the frequency axis, and the allocated RB is indicated using a bitmap. In this case, when the corresponding RBs are displayed with a bitmap having the same size as the number of RBs, a very large bitmap must be transmitted for a large cell bandwidth, which may cause high control signaling overhead. Therefore, in resource allocation type 0, the size of the bitmap is reduced by grouping consecutive RBs into groups instead of directly pointing to each RB in the frequency domain. For example, when the total transmission bandwidth is NRB and the number of RBs per resource block group (RBG) is P, the bitmap required to inform RB allocation information in resource allocation type 0 is

Becomes The smaller the number of RBs per RBG, that is, the P value, the greater the flexibility of scheduling, while the disadvantage of increased control signaling overhead. Therefore, the P value should be appropriately selected to reduce the number of bits required while maintaining sufficient resource allocation flexibility.

In LTE, the RBG size is determined by the downlink cell bandwidth, and possible RBG sizes are shown in Table 3 below.

TABLE 3

In resource allocation type 1, resource allocation is performed by dividing the entire RBG set on the frequency axis into scattered RBG subsets. The number of subsets is given from the cell bandwidth, and the number of subsets of resource allocation type 1 is equal to the group size (RBG size, P) of resource allocation type 0. The RB allocation information of resource allocation type 1 is composed of three fields as follows.

비트)First field: selected RBG subset indicator (

beat)

Second field: indicator of shift of resource allocation in subset (1 bit)

-

-1 비트)-Third field: bitmap for allocated RBG (

-

-1 bit)

으로 자원할당 타입 0에서 요구되는 비트 수와 동일하게 된다. 따라서 단말에게 자원할당 타입이 0인지 1인지 알려주기 위해, 1 비트의 지시자가 추가로 붙게 된다.As a result, the total number of bits used in resource allocation type 1 is

This is equal to the number of bits required for resource allocation type 0. Therefore, in order to inform the terminal whether the resource allocation type is 0 or 1, an indicator of 1 bit is additionally attached.

In resource allocation type 2, unlike the two resource allocation types described above, it does not depend on the bitmap. Instead, resource allocation is indicated by the starting point and length of the RB allocation. Therefore, resource allocation types 0 and 1 both support noncontiguous RB allocations, while resource allocation type 2 supports only contiguous allocations. As a result, the RB allocation information of resource allocation type 2 is composed of two fields as follows.

First field: indicator indicating RB _start point (RB _start )

Second field: indicator indicating the length of consecutively allocated RBs (L _CRBs )

의 비트 수가 사용된다. In resource allocation type 2,

The number of bits of is used.

All three resource allocation types correspond to virtual resource blocks (VRBs). Resource allocation types 0 and 1 are mapped directly to the PRB in the form of localized VRBs. On the other hand, resource allocation type 2 supports both localized and distributed VRBs. Therefore, in resource allocation type 2, an indicator for distinguishing between localized and distributed VRBs is added.

FIG. 29 illustrates a PDCCH 2901 and an EPDCCH 2902 which are downlink physical channels through which DCI of LTE is transmitted.

According to FIG. 29, the PDCCH 2901 is time-multiplexed with the PDSCH 2907, which is a data transmission channel, and is transmitted over the entire system bandwidth. The region of the PDCCH 2901 is represented by the number of OFDM symbols, which is indicated to the UE by a CFI transmitted through a physical control format indicator channel. By assigning the PDCCH 2901 to the OFDM symbol that comes in front of the subframe, the UE can decode the downlink scheduling assignment as soon as possible and thereby downlink shared channel (DL-SCH). There is an advantage in that the decoding delay, i.e., the overall downlink transmission delay, can be reduced, because one PDCCH carries one DCI message and multiple terminals can be simultaneously scheduled in downlink and uplink. In this case, multiple PDCCHs are transmitted simultaneously.

The CRS 2904 is used as a reference signal for decoding the PDCCH 2901. The CRS 2904 is transmitted every subframe over the entire band, and scrambling and resource mapping vary according to a cell ID. Since the CRS 2904 is a reference signal commonly used by all terminals, UE-specific beamforming cannot be used. Therefore, the multi-antenna transmission scheme for PDCCH of LTE is limited to open loop transmit diversity. The port number of the CRS is implicitly known to the terminal from the decoding of the PBCH.

Resource allocation of the PDCCH 2901 is based on a control-channel element, and one CCE is composed of nine resource element groups (REGs), that is, 36 REs in total. The number of CCEs required for a specific PDCCH 2901 may be 1, 2, 4, or 8, depending on the channel coding rate of the DCI message payload. As such, different CCE numbers are used to implement link adaptation of the PDCCH 2901.

The UE should detect a signal without knowing information about the PDCCH 2901. In LTE, a search space representing a set of CCEs is defined for blind decoding. The search space is composed of a plurality of sets in the aggregation level (AL) of each CCE, which is not explicitly signaled and is implicitly defined through a function and a subframe number by the terminal identity. In each subframe, the UE decodes the PDCCH 2901 for all possible resource candidates (candidate) that can be created from CCEs in the configured search space, and information declared as valid for the UE through CRC check. To process

The search space is classified into a terminal-specific search space and a common search space. A certain group of terminals or all terminals may examine a common search space of the PDCCH 2901 to receive cell common control information such as dynamic scheduling of paging information or a paging message. For example, scheduling allocation information of a DL-SCH for transmission of a system information block (SIB) -1 including cell information of a cell may be received by examining a common search space of the PDCCH 2901. .

According to FIG. 29, the EPDCCH 2902 is frequency multiplexed with the PDSCH 2907 and transmitted. The base station may properly allocate resources of the EPDCCH 2902 and the PDSCH 2907 through scheduling, thereby effectively supporting coexistence with data transmission for the existing LTE terminal. However, since the EPDCCH 2902 is allocated and transmitted in one subframe on the time axis, there is a problem in terms of transmission delay time. The plurality of EPDCCH 2902 constitutes one EPDCCH 2902 set, and the allocation of the EPDCCH 2902 set is performed in units of PRB pairs. The location information for the EPDCCH set is UE-specifically configured and it is signaled through radio resource control (RRC). Up to two sets of EPDCCH 2902 can be configured for each UE, and one set of EPDCCH 2902 can be configured to be multiplexed to different UEs at the same time.

Resource allocation of EPDCCH 2902 is based on enhanced CCE (ECCE), and one ECCE may consist of four or eight eREGs (enhanced REGs), and the number of EREGs per ECCE is CP length and subframe configuration information. Depends on. One EREG consists of 9 REs, so there may be 16 EREGs per PRB pair. The EPDCCH transmission method is divided into localized / distributed transmission according to the RE mapping method of the EREG. The aggregation level of the ECCE may be 1, 2, 4, 8, 16, 32, which is determined by CP length, subframe configuration, EPDCCH format, and transmission scheme.

EPDCCH 2902 only supports UE-specific search spaces. Accordingly, the terminal that wants to receive the system message must examine the common search space on the existing PDCCH 2901.

Unlike the PDCCH 2901, a demodulation reference signal (DM-RS) 2905 is used as the reference signal for decoding in the EPDCCH 2902. Thus, the precoding for the EPDCCH 2902 can be configured by the base station and can use terminal-specific beamforming. The UE may decode the EPDCCH 2902 through the DMRS 2905 without knowing which precoding is used. The EPDCCH 2902 uses the same pattern as the DMRS of the PDSCH 2907. However, unlike the PDSCH 2903, the DMRS 2905 in the EPDCCH 2902 can support transmission using up to four antenna ports. The DMRS 2905 is transmitted only in the corresponding PRB in which the EPDCCH is transmitted.

Port configuration information of the DMRS 2905 depends on the EPDCCH 2902 transmission scheme. In the localized transmission scheme, the antenna port corresponding to the ECCE to which the EPDCCH 2902 is mapped is selected based on the ID of the UE. When different UEs share the same ECCE, that is, when multiuser MIMO (Multiuser MIMO) transmission is used, a DMRS antenna port may be allocated to each UE. Alternatively, the DMRS 2905 may be shared and transmitted. In this case, the DMRS 2905 may be divided into a DMRS 2905 scrambling sequence configured as higher layer signaling.

In the case of the distributed transmission scheme, up to two antenna ports of the DMRS 2905 are supported, and a diversity scheme of a precoder cycling scheme is supported. DMRS 2905 may be shared for all REs transmitted in one PRB pair.

In the above, a downlink control channel transmission scheme in LTE and LTE-A and an RS for decoding the same are described.

Hereinafter, a downlink control channel in a 5G communication system which is currently discussed will be described in more detail with reference to the accompanying drawings.

30 is a diagram illustrating an example of basic units of time and frequency resources constituting a downlink control channel that can be used in 5G.

According to Fig. 30, basic units of time and frequency resources constituting the control channel (named REG, NR-REG, PRB, etc. may be named. In the present invention, NR-REG 3003 is referred to as “time”). The axis consists of one OFDM symbol 3001, and the frequency axis consists of twelve subcarriers 3002, that is, one RB. In configuring the basic unit of the control channel, the data channel and the control channel may be time-multiplexed in one subframe by assuming that the time axis basic unit is 1 OFDM symbol 3001. Positioning the control channel ahead of the data channel reduces the user's processing time, making it easy to meet latency requirements. By setting the base unit of the frequency axis of the control channel to 1 RB 3002, frequency multiplexing between the control channel and the data channel can be more efficiently performed.

By concatenating the NR-REG 3003 shown in FIG. 30, control channel regions of various sizes can be set. As an example, when the basic unit to which the downlink control channel is allocated in 5G is NR-CCE 3004, one NR-CCE 3004 may be configured with a plurality of NR-REGs 3003. Referring to the NR-REG 3003 shown in FIG. 30 as an example, the NR-REG 3003 may consist of twelve REs and one NR-CCE 3004 into four NR-REG 3003. If configured, one NR-CCE 3004 may consist of 48 REs. When the downlink control region is configured, the corresponding region may be composed of a plurality of NR-CCEs 3004, and a specific downlink control channel may include one or a plurality of NR-CCEs 3004 according to an aggregation level (AL) in the control region. Can be mapped and transmitted. The NR-CCEs 3004 in the control region are divided by numbers, and the numbers may be assigned according to a logical mapping method.

The basic unit of the downlink control channel illustrated in FIG. 30, that is, NR-REG 3003, may include both REs to which DCI is mapped and a region to which DMRS 3005, which is a reference signal for decoding them, is mapped. In this case, the DMRS 3005 may be efficiently transmitted in consideration of overhead due to RS allocation. For example, when the downlink control channel is transmitted using a plurality of OFDM symbols, the DMRS 3005 may be transmitted only in the first OFDM symbol. The DMRS 3005 may be mapped and transmitted in consideration of the number of antenna ports used for transmitting the downlink control channel.

30 shows an example in which two antenna ports are used. At this time, there may be a DMRS 3006 transmitted for antenna port # 0 and a DMRS 3007 transmitted for antenna port # 1. DMRSs for different antenna ports can be multiplexed in various ways.

30 shows an example in which DMRSs corresponding to different antenna ports are orthogonally transmitted in different REs. As shown in FIG. 30, FDM may be transmitted, or CDM may be transmitted. In addition, there may be various types of DMRS patterns, which may be related to the number of antenna ports. In the following description, it is assumed that two antenna ports are used. However, the same principle in the present invention can be applied to two or more antenna ports.

FIG. 31 illustrates an example of a control resource set for transmitting a downlink control channel in a 5G wireless communication system.

In FIG. 31, two control regions (control region # 1 3101) within a system bandwidth 3110 on the frequency axis and one slot 3120 on the time axis (one slot is assumed to be 7 OFDM symbols in the example of FIG. An example in which the control area # 2 3102 is set is shown.

The control regions 3101 and 3102 may be set to specific subbands 3103 within the overall system bandwidth 3110 on the frequency axis. The time axis may be set as one or a plurality of OFDM symbols and may be defined as a control resource set duration (3104). In the example of FIG. 31, the control region # 1 3101 is set to the length of two symbols of the control region, and the control region # 2 3102 is set to the length of the control region of one symbol.

In 5G, a plurality of control regions may be set in one system from a base station perspective. In addition, a plurality of control areas may be set in one terminal from a terminal perspective. In addition, the control area of some of the control areas set in the system may be set to the terminal. Accordingly, the terminal may not know whether a specific control area exists in the system. For example, in FIG. 31, two control areas of the control area # 1 3101 and the control area # 2 3102 are set in the system, and the control area # 1 3101 is set in the terminal # 1. The control area # 1 3101 and the control area # 2 3102 may be set in the terminal # 2. In this case, when there is no additional indicator, the terminal # 1 may not know whether the control region # 2 3102 exists.

The control region in 5G described above may be set as a common control region, UE-group common, or UE-specific. The control region may be configured for each UE through UE-specific signaling, UE group common signaling, or RRC signaling. Setting the control region to the terminal means providing information such as the position of the control region, subbands, resource allocation of the control region, control region length, and the like.

32 is a diagram illustrating an example of a manner in which a downlink control channel is mapped in a 5G wireless communication system.

In FIG. 32, it is assumed that one NR-CCE 3210 is composed of four NR-REGs 3220. In addition, it is assumed that the control region length 3230 is three OFDM symbols.

The resource mapping scheme considered in FIG. 32 means a mapping scheme between the NR-CCE 3210 and the NR-REG 3220. Localized mapping and distributed mapping may exist in a manner of mapping a plurality of NR-REGs 3220 to one NR-CCE 3210. Intensive mapping refers to a mapping scheme in which a plurality of contiguous NR-REGs 3220 constitutes one NR-CCE 3210. Distributed mapping refers to a mapping scheme in which a plurality of non-contiguous NR-REGs 3220 constitutes one NR-CCE 3210.

In addition, as a method of mapping the NR-REG 3220 to one NR-CCE 3210, there may be a time-first mapping and a frequency-first mapping scheme. Here, the time-first mapping means that when mapping a plurality of NR-REGs 3220 to one NR-CCE 3210, priority is given to the time domain in two-dimensional resource mapping for frequency and time. do. Similarly, the frequency-first mapping here means that when mapping a plurality of NR-REGs 3220 to one NR-CCE 3210, priority is given to the frequency domain in two-dimensional resource mapping for frequency and time. it means.

An example of a total of four mapping schemes is illustrated in FIG. 32.

3201 shows an example in which consecutive NR-REGs 3220 are frequency-first mapped while being an intensive mapping in which one NR-CCE 3210 is mapped. 3202 shows an example in which consecutive NR-REGs 3220 are time-first mapped while being an intensive mapping that is mapped to one NR-CCE 3210. 3203 shows an example in which discontinuous NR-REGs 3220 are frequency-first mapped while being distributed mapping mapped to one NR-CCE 3210. 3204 shows an example in which discontinuous NR-REGs 3220 are distributed mappings mapped to one NR-CCE 3210 and at the same time-priority mapping.

In the above, the downlink control channel in the 5G communication system currently discussed has been described in detail with reference to the accompanying drawings.

As described above, the downlink control channel in 5G may be transmitted in the set control area. In this case, in order to increase the efficiency of resources, data, for example, a PDSCH, may be transmitted to the remaining areas that are not actually used for DCI transmission in the control area. In this case, the PDSCH transmitted in the control region may start transmission at different starting points, that is, different OFDM symbols. Therefore, when some resources of the unused control area are reused for data transmission, additional signaling for a data start point may be required. In addition, when PDSCH is multiplexed and transmitted in a situation where a plurality of resource regions exist in a plurality of systems, various signaling such as resource region configuration information as well as signaling of a data start point may be required. In addition, an indicator of whether to transmit DCI of another user may be needed depending on rate matching or pucturing of the PDSCH transmitted in the control region. As a result, there is an increase in resource efficiency due to resource sharing between the data channel and the control channel and a trade-off between overhead due to additional signaling. Accordingly, the present invention provides a method for efficiently sharing resources between a data channel and a control channel in 5G, and a method and apparatus for additional signaling for supporting the same.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it should be noted that the same components in the accompanying drawings are represented by the same reference numerals as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted.

In addition, the embodiments of the present invention will be described in detail, LTE and 5G system will be the main target, but the main subject of the present invention greatly extends the scope of the present invention to other communication systems having a similar technical background and channel form. Applicable in a few variations without departing from the scope, which will be possible in the judgment of those skilled in the art.

Hereinafter, various embodiments in which the data channel and the control channel proposed by the present invention share resources will be described.

<Example 3-1>

33 is a diagram illustrating an example of a method in which data channels and control channels share resources according to embodiment 3-1 of the present invention.

In FIG. 33, two control regions, that is, control region # 1 3330 and control region # 2 3340, are set in the time and frequency resources of the system bandwidth 3310 on the frequency axis and one slot 3320 on the time axis. An example is shown. 33, the control region length of the control region # 1 3330 is set to the control region length # 1 3350, and the control region length of the control region # 2 3340 is set to the control region length # 2 (3360). It is.

Referring to FIG. 33, the control area # 1 3330 is set to the terminal # 1, and the control area # 1 3330 and the control area # 2 3340 are configured to the terminal # 2. Make assumptions. 33, DCI # 1 3312, which is a control signal for terminal # 1, is transmitted from control area # 1 3330, and DCI # 2 3313, which is a control signal for terminal # 2, is control area # 1. Assume that a situation 3330 and control area # 2 3340 are transmitted. In the control region # 1 3330 and the control region # 2 3340, a resource 3314 that is not used for transmission of the DCI # 1 3312 and the DCI # 2 3313 may exist. In FIG. 33, it is assumed that PDSCH # 1 3311, which is a data channel for UE # 1, is transmitted. 33 is only an example for convenience in describing the present invention, it should be noted that this does not limit the present invention to a specific situation. The same can be applied in various transmission environments with a slight modification without departing from the scope of the present invention.

<Example 3-1-1>

An example corresponding to 3301 of FIG. 33 illustrates a case in which the control region # 1 3330 set in the terminal # 1 exists at a frequency position to which the PDSCH # 1 3311, which is a data channel of the terminal # 1, is scheduled.

In this case, the base station may schedule the PDSCH # 1 3311 to start after the control region length # 1 3350 corresponding to the time axis region of the control region # 1 3330 in the time domain. In other words, the data start point of PDSCH # 1 3311 may be designated as the control region length # 1 (3350) + first symbol. In this case, since the terminal # 1 knows the setting information for the control region # 1 3330 in advance, the position of the data start point for the PDSCH # 1 3311 is implicitly known from the control region length # 1 3350. Can be.

<Example 3-1-2>

In an example corresponding to 3302 of FIG. 33, the control region # 1 3330 is present at a frequency position for scheduling the PDSCH # 1 3311, which is a data channel of the terminal # 1, and the DCI # 1, which is a control signal of the terminal # 1, is located. Shows the case 3312 is transmitted. At this time, the PDSCH # 1 3311 can be scheduled while reusing unused resources 3314 in the control region, and a part of the PDSCH # 1 3311 for the portion overlapping with the transmission resource of the DCI # 1 3312 This rate matching can be.

Since UE # 1 can obtain information on the transmission resource of DCI # 1 3312 through blind decoding, it can implicitly know which part of PDSCH # 1 3311 has been rate matching. As the transmission of the PDSCH # 1 3311 may be transmitted in the control region # 1 3330, an indicator for the data start point may be additionally transmitted.

<Example 3-1-3>

In an example corresponding to 3303 of FIG. 33, the control region # 1 3330 is present at a frequency position for scheduling the PDSCH # 1 3311, which is a data channel of the terminal # 1, and the DCI # 2 which is a control signal of the terminal # 2. 3333 is shown. At this time, the PDSCH # 1 3311 may be scheduled while reusing unused resources 3314 in the control region, and a portion of the PDSCH # 1 3311 overlaps with a transmission resource of the DCI # 2 3313. It can be rate matched or puncturing. In case of rate matching, since UE # 1 does not know the transmission resources of DCI # 2 3313, an additional indicator indicating a rate-matched portion of PDSCH # 1 3311 may be transmitted. In case of puncturing, the terminal # 1 may decode the PDSCH # 1 3311 as it is. As the transmission of the PDSCH # 1 3311 may be transmitted in the control region # 1 3330, an indicator for the data start point may be additionally transmitted.

<Example 3-1-4>

In an example corresponding to 3304 of FIG. 33, the control region # 1 3330 is present at a frequency position for scheduling the PDSCH # 1 3311, which is a data channel of the terminal # 1, and the DCI # 2 which is a control signal of the terminal # 2. 3333 is shown. At this time, the PDSCH # 1 3311 can be scheduled while reusing unused resources 3314 in the control region, and can be scheduled while avoiding transmission resources of the DCI # 2 3313. For example, if DCI # 2 3313 is transmitted in the first OFDM symbol in control region # 1 3330, PDSCH # 1 3311 is the second OFDM symbol that is a symbol after DCI # 2 3313 is transmitted. Can be sent from As the transmission of the PDSCH # 1 3311 may be transmitted in the control region # 1 3330, an indicator for the data start point may be additionally transmitted.

<Example 3-1-5>

An example corresponding to 3305 of FIG. 33 illustrates a case in which there is no control region set at a frequency position to which PDSCH # 1 3311, which is a data channel of UE # 1, is scheduled. In this case, the PDSCH # 1 3311 may be transmitted from the first OFDM symbol. At this time, since the start point of the control region length # 1 3350 and the PDSCH # 1 3311 corresponding to the time axis region of the control region # 1 3330 set to the terminal # 1 may be different, The indicator may additionally be sent.

<Example 3-1-6>

An example corresponding to 3306 of FIG. 33 is that there is no control region set at a frequency position to schedule PDSCH # 1 3311, which is a data channel of UE # 1, or a control region # 2 3340 not set to UE # 1. Show if present. In this case, the PDSCH # 1 3311 may be scheduled to start after the control region length # 1 3350 corresponding to the time axis region of the control region # 1 3330 set for the terminal # 1. In this case, since the terminal # 1 knows the setting information for the control region # 1 3330 in advance, the position of the data start point for the PDSCH # 1 3311 is implicitly known from the control region length # 1 3350. Can be.

<Example 3-1-7>

An example corresponding to 3307 of FIG. 33 illustrates a case in which the control region # 2 3340 not set in the terminal # 1 exists at a frequency position to which the PDSCH # 1 3311, which is the data channel of the terminal # 1, is scheduled. In this case, the base station may schedule the PDSCH # 1 3311 to start after the control region length # 2 3360 corresponding to the time axis region of the control region # 2 3330 in the time domain. In other words, the data start point of PDSCH # 2 3311 may be designated as the control region length # 2 (3360) + first symbol.

In this case, since the terminal # 1 does not know the setting information for the control area # 2 3330, an indicator for the data start point for the PDSCH # 1 3311 may be additionally transmitted. Alternatively, the terminal # 1 is informed of the setting information for the control region # 2 (3340) (for example, the frequency position of the control region # 2 (3340), the control region length # 2 (3360), etc.) and the PDSCH # 1 3311 The starting point can be known implicitly from control region length # 2 3360.

<Example 3-1-8>

PDSCH # 1 3311, which is a data channel of UE # 1, may be scheduled and transmitted over the entire system band 3310. More specifically, at least two or more examples of PDSCH # 1 3311 transmissions corresponding to 3301, 3302, 3303, 3304, 3305, 3306, and 3307 illustrated in FIG. 33 may occur simultaneously. In this case, the above-described embodiments may be combined in the resource sharing method of the data channel and the control channel. In this case, the data start point may be applied differently according to the frequency position where PDSCH # 1 3311 is scheduled.

As a specific example, in FIG. 33, PDSCH # 1 3311 is scheduled over the entire system band 3310 so that a portion of PDSCH # 1 3311 is scheduled in the region of 3302 and PDSCH # 1 3311 Assume that the remainder of is scheduled to be transmitted to the area of 3307. In this case, a part of the PDSCH # 1 3311 in the region 3302 may be transmitted according to the above-described embodiment 3-1-2, and thus may be transmitted from the first OFDM symbol. The remaining part of the PDSCH # 1 3311 in the area 3302 may be transmitted according to the above-described embodiment 3-1-7, and thus may be transmitted from the second OFDM symbol. Accordingly, the data start point may be different for each PDSCH # 1 3311 portion according to the frequency region to which the PDSCH # 1 3311 is assigned. In this case, a plurality of indicators for the data start point may be transmitted.

<Example 3-1-9>

PDSCH # 1 3311, which is a data channel of UE # 1, may be scheduled and transmitted over the entire system band 3310 and corresponds to 3301, 3302, 3303, 3304, 3305, 3306, and 3307 illustrated in FIG. At least two or more of the examples of PDSCH # 1 3311 transmission may occur simultaneously. In this case, the above-described embodiments may be combined in the resource sharing method of the data channel and the control channel. However, regardless of the frequency position where PDSCH # 1 3311 is scheduled, the data start point may be scheduled in the same manner. As a specific example, in FIG. 33, PDSCH # 1 3311 is scheduled over the entire system band 3310 so that a portion of PDSCH # 1 3311 is scheduled in the region of 3302 and PDSCH # 1 3311 Assume that the remainder of is scheduled to be transmitted to the area of 3307.

In this case, a part of the PDSCH # 1 3311 in the region 3302 may be transmitted according to the above-described embodiment 3-1-2, and thus may be transmitted from the first OFDM symbol. The remaining part of the PDSCH # 1 3311 in the area 3302 may be transmitted according to the above-described embodiment 3-1-7, and thus may be transmitted from the second OFDM symbol. However, the base station may select one data start point among different data start points for each part of the PDSCH # 1 3311 to determine the data start point of the entire PDSCH # 1 3311. For example, the largest value among a plurality of partial data start points may be selected as the entire data start point. Therefore, in this case, only one indicator for the data start point can be transmitted.

In the above, a method of sharing a resource between a data channel and a control channel and necessary signaling have been described through various embodiments. As described above, in order to efficiently support resource sharing between the data channel and the control channel, a trade-off between an increase in resource efficiency due to resource sharing and an overhead according to signaling required to support the same must be considered. do.

Hereinafter, a resource sharing method and a signaling method for more efficiently supporting resource sharing of a data channel and a control channel in 5G will be described through various embodiments.

<Example 3-2>

34 is a diagram illustrating an example of a resource sharing method of a data channel and a control channel according to embodiment 3-2 of the present invention.

34 shows two control regions, namely control region # 1 (3440), within the time and frequency resources of the system bandwidth 3410 on the frequency axis and one slot 3420 (assuming one slot = 7 symbols 3430) on the time axis. ) And control area # 2 3450 are shown.

In FIG. 34, the control region length of the control region # 1 3440 is set to the control region length # 1 3460, and the control region length of the control region # 2 3450 is set to the control region length # 2 3470. It is. In the example of FIG. 34, any PDSCH 3401 may be scheduled with any resource within system band 3410. In scheduling the PDSCH 3401, resource allocation may be performed using various resource sharing methods according to the above-described embodiment 3-1 by considering the resource regions set in the system (3440, 3450). have. Accordingly, parts of the PDSCH 3401 may have different starting points according to assigned frequency positions.

In embodiment 3-2 of the present invention, in order to support resource allocation with multiple data start points for one PDSCH 3401, the base station may transmit indicators for multiple data start points. In this case, in order to reduce signaling overhead due to transmitting a plurality of indicators, the PDSCH 3401 may be partitioned, and each PDSCH 3401 may be scheduled to have the same data start point. It will be described in more detail with reference to the drawings.

34 illustrates an example in which the PDSCH 3401 is divided into three data parts, a data part # 1 3402, a data part # 2 3403, and a data part # 3404. Each data portion 3401, 3402, 3403 may be composed of one or multiple RBs or RBGs. 34 illustrates an example in which each of the data portions 3401, 3402, and 3403 are composed of two RBGs. In scheduling each data portion 3401, 3402, 3403 of the PDSCH 3401, it is assumed that the PDSCH is scheduled in RBG units for convenience in describing the present invention without any limitation on the frequency axis. Scheduling in RBG units is basically a concept including scheduling in RB units). In this case, each of the data portions 3401, 3402, and 3403 may be scheduled at any frequency location, and may have different data start points depending on whether and how to reuse resources for the control region. At this time, in determining the data start point of the PDSCH 3401, all RBGs present in each of the data portions 3401, 3402, and 3403 may be scheduled to have the same data start point. As a result, the data start point may be different for each data portion 3401, 3402, 3403.

In the example of FIG. 34, the data start point of data portion # 1 3402 is the first OFDM symbol, the data start point of data portion # 2 3403 is the third OFDM symbol, and the data start point of data portion # 3 3404. May be scheduled and transmitted as a second OFDM symbol. The base station may transmit indicators for the data start point for each data portion (3401, 3402, 3403), the terminal is assigned to the resource allocation information for the PDSCH (3401) and each data portion (3401, 3402, 3403) The decoding of the PDSCH 3401 may be performed based on the data start point information about the PDSCH 3401.

As the fragmentation configuration information (eg, the number of portions) for the PDSCH 3401, a value promised as a system parameter may be used. Alternatively, the fragmentation configuration information for the PDSCH may be implicitly determined by other system parameters, for example, system bandwidth, the number of resource regions configured, resource region configuration information, slot length, slot aggregation, or the like. Alternatively, the terminal may be known to the terminal as a master information block (MIB) or a system information block (SIB) as system common system information. Alternatively, the terminal may be set semi-statically to the terminal through higher layer signaling such as RRC signaling and MAC CE signaling. The data start point indicator for each of the data portions 3401, 3402, 3403 may be dynamically transmitted over the terminal-specific DCI.

Embodiment 3-2 of the present invention may include an operation of indicating one data start point with respect to one PDSCH 3401. For example, if the number of data portions is set to one, one indicator may be transmitted for the data start point.

35A and 35B illustrate an operation of a base station and a terminal of the present invention.

First, a base station procedure will be described with reference to FIG. 35A.

The base station performs resource allocation for the downlink control channel in step 3501.

The base station performs resource allocation for the downlink data channel in step 3502. In this case, the base station may perform resource allocation for the data channel based on the resource sharing method of the data channel and the control channel according to the embodiment 3-2 of the present invention described above. That is, the data channel may be divided into several data parts and scheduled to different data start points. In addition, the base station may perform resource allocation based on the resource sharing method of the data channel and the control channel according to the embodiment 3-1 described above. The base station may further transmit a data start point indicator for each data portion in step 3503. The base station may transmit a downlink control channel and a data channel in step 3504.

Next, the terminal procedure will be described with reference to FIG. 35B.

In step 3511, the UE decodes a downlink control channel and obtains a DCI.

In step 3512, the UE may acquire resource allocation information for the downlink data channel from the DCI. In addition, the terminal may obtain data start point information for each data portion in step 3513.

The terminal may decode the scheduled downlink data channel based on the resource allocation information and the information about the data start point obtained in step 3514.

<3-3 Example>

36 is a diagram illustrating an example of a method for sharing resources between a data channel and a control channel according to embodiment 3-3 of the present invention.

In FIG. 36, two control regions, control region # 1 3640 and control region # 2 3650, are set in the time and frequency resources of the system bandwidth 3610 on the frequency axis and one slot 3620 on the time axis. An example is shown.

36, the control region length of the control region # 1 3640 is set to the control region length # 1 3660, and the control region length of the control region # 2 3650 is set to the control region length # 2 3670. It is. In the example of FIG. 36, any PDSCH 3601 may be scheduled with any resource within system band 3610.

In scheduling the PDSCH 3601, resource allocation may be performed using various resource sharing methods according to the above-described embodiment 3-1 by considering the resource regions set in the system (3640, 3650). have. Thus, portions of PDSCH 3601 may have different starting points depending on whether the frequency location and the control region's resources are reused.

In the third to third embodiments of the present invention, the data start point at each frequency location to which the PDSCH 3601 is allocated may be set to semi-static. In more detail with reference to the drawings, the overall system bandwidth 3610 may be partitioned into several bandwidth parts. In the example of FIG. 36, the total system bandwidth 3610 is divided into four parts, that is, bandwidth part # 1 3602, bandwidth part # 2 3603, bandwidth part # 3 3604, and bandwidth part # 4 3605. Separated by. Each of the bandwidth parts 3602, 3603, 3604, and 3605 may be semi-statically set to have a specific data start point, and a corresponding setting may be instructed to the terminal.

In FIG. 36, the data start point in the bandwidth part # 1 3602 and the bandwidth part # 2 3603 is the third OFDM symbol, the data start point in the bandwidth part # 3 3604 is the first OFDM symbol, and the bandwidth The data starting point in part # 4 3605 shows an example of setting each of the second OFDM symbols.

Depending on which bandwidth portion 3602, 3603, 3604, 3605 the PDSCH 3601 is transmitted through a resource allocation process, a portion of the PDSCH 3601 or PDSCH 3601 transmitted to the corresponding bandwidth portion may be preset data. It can be scheduled to be sent to the starting point.

For example, in the PDSCH 3601 scheduled in FIG. 36, data transmitted to the bandwidth portion # 1 3602 and the bandwidth portion # 2 3603 may be transmitted using the data start point as the third OFDM symbol. Similarly, data can be transmitted using the data start point as the first OFDM symbol for the part transmitted in the bandwidth part # 3 3604 of the PDSCH 3601, and data start for the part transmitted in the bandwidth part # 4 3605. Data can be transmitted using the point as the second OFDM symbol. As a result, data start points of all PDSCHs 3601 transmitted in a specific bandwidth portion may be transmitted by following a data start point preset in the corresponding bandwidth portion.

In performing the third embodiment of the present invention, the data starting point of each of the bandwidth parts 3602, 3603, 3604, and 3605 may be determined based on the setting information of the control area 3640 and 3605 existing in the system. Can be. In more detail, it is determined whether a control region exists in a specific band portion. If the control region exists, a control region length + 1 symbol of the corresponding control region may be set as a data start point in the corresponding band portion. . For example, in FIG. 36, the control area # 1 3640 exists in the bandwidth part # 2 3603, and thus the data start point in the bandwidth part # 2 3603 is (control area length # 1 (3660) +1). The third symbol may be set as the first symbol.

As another example, since a control region does not exist in the bandwidth portion # 3 3604 of FIG. 36, a data start point may be set as the first OFDM symbol.

In addition, each terminal may not receive the data start point indicator in a specific bandwidth portion according to the control region setting information set to the terminal. For example, in FIG. 36, it is assumed that the control region # 1 3640 is set in the terminal # 1, and the terminal has already received information about the frequency axis position and the control region length # 1 3660 of the control region # 1 3640. Know. Accordingly, the base station transmits an indicator of the data start point in the bandwidth portions (bandwidth portion # 1 3602 and bandwidth portion # 2 3603) in which control region # 1 3640 is set for terminal # 1. Can be omitted.

The terminal # 1 can implicitly know the data start point setting information in the bandwidth portion # 1 3602 and the bandwidth portion # 2 3603 from the setting information of the control region # 1 3640.

The partial configuration information for the system bandwidth 3610 (eg, the number of bandwidth portions, the bandwidth of the bandwidth portion, etc.) may be a value promised as a system parameter. Alternatively, it may be implicitly determined by other system parameters, for example, system bandwidth, number of resource regions set, resource region setting information, carrier aggregation or the like. Alternatively, the terminal may be known to the terminal as MIB or SIB as cell common system information. Alternatively, the terminal may be set semi-statically to the terminal through higher layer signaling such as RRC signaling and MAC CE signaling.

The data start point indicator in each of the bandwidth parts 3602, 3603, 3604, and 3605 may be delivered to the terminal through higher layer signaling, for example, RRC signaling or MAC CE signaling.

Embodiment 3-3 of the present invention may include an operation of indicating one data start point with respect to one PDSCH 3601. For example, if the number of bandwidth parts is set to one, one indicator may be transmitted or semi-statically set for the data start point.

In 5G, the system bandwidth and the maximum bandwidth that the terminal can support may be different from each other. Therefore, all procedures operating based on the above-described system bandwidth may be replaced by a bandwidth supported by the terminal (eg, UE bandwidth) and applied equally.

37A and 37B are diagrams illustrating operations of a base station and a terminal according to Embodiment 3-3 of the present invention.

First, a base station procedure will be described with reference to FIG. 37A.

The base station may transmit setting information on the bandwidth portion in step 3701 and data start point information on each bandwidth portion in step 3702.

The base station performs resource allocation for the downlink control channel in step 3703. The base station may perform resource allocation for the data channel in step 3704.

At this time, the base station may perform resource allocation for the data channel based on the resource sharing method of the data channel and the control channel according to the third embodiment of the present invention described above. That is, scheduling may be performed by applying a preset data start point according to the frequency domain to which the data channel is allocated.

The base station may perform transmission for the downlink control channel and the data channel in step 3705.

Next, the terminal procedure will be described with reference to FIG. 37B. In step 3711, the terminal may receive configuration information on the bandwidth portion.

The terminal may receive data start point information for each bandwidth portion in step 3712.

In step 3713, the UE decodes the downlink control channel and obtains a DCI.

In step 3714, the UE may acquire resource allocation information for the downlink data channel from the DCI. In step 3715, the UE may apply a preset data start point for the downlink data channel in each bandwidth portion.

The UE may perform decoding on the scheduled downlink data channel in step 3716.

<Example 3-3-1>

In the 3-3-1 embodiment of the present invention, a method of setting the data start point at each frequency position to which the PDSCH is assigned is semi-static, and setting up all (or some required parts) control regions in the system. Information may be instructed to the terminal. More specifically, in FIG. 36, the control region of the terminal # 1 is set to the control region # 1 3640, and thus, the terminal # 1 may know time and frequency resource information about the control region # 1 3640. have. However, since the terminal # 1 has not received the setting for the control region # 2 3650, the terminal cannot know whether the control region # 2 3650 in the system bandwidth 3610 exists. At this time, in order to semi-statically set the data start point at the frequency position allocated to the PDSCH 3601, the terminal # 1 may be informed of the setting information about the control region # 2 3650. That is, the terminal # 1 corresponds to the frequency position to which the PDSCH 3601 is transmitted based on the configuration information of all control region, control region # 1 3640 and control region # 2 3650 existing in the system. You can apply the starting point of the data.

<Example 3-3-2>

In the 3-3-2 embodiment of the present invention, in the resource sharing method of a data channel and a control channel according to the embodiment 3-3 of the present invention, quasi-static signaling of a data start point is on / off in various ways. Can be. On / off operations may be applied to the overall system bandwidth 3610 or to specific bandwidth portions 3602, 3603, 3604, 3605. On / off operation may be dynamically configured through DCI or semi-statically through higher layer signaling (eg, RRC signaling, MAC CE signaling).

<Example 3-4>

FIG. 38 illustrates an example of a resource sharing method of a data channel and a control channel according to embodiment 3-4 of the present invention. FIG.

In FIG. 38, two control areas, control area # 1 3840 and control area # 2 3850, are set in the time and frequency resources of the system bandwidth 3810 on the frequency axis and one slot 3820 on the time axis. An example is shown.

In FIG. 38, the control region length of the control region # 1 3840 is set to the control region length # 1 3860, and the control region length of the control region # 2 3850 is set to the control region length # 2 3870. It is.

In the example of FIG. 38, any PDSCH 3801 may be scheduled with any resource within system band 3810. In scheduling the PDSCH 3801, resources using the various resource sharing methods according to the embodiments 3-1 to 3-3 described above in consideration of (3840, 3850) the resource regions set in the system Allocation can be performed. Thus, parts of PDSCH 3801 may have different starting points depending on whether the frequency location and the control region's resources are reused.

In the third to fourth embodiments of the present invention, the data start point at each frequency position to which the PDSCH 3801 is allocated may be set to semi-static and dynamic. The overall system bandwidth 3810 may be partitioned into several bandwidth parts, and a data start point in each bandwidth part may be semi-statically set. In addition, some bandwidth portions of each bandwidth portion may be set to be dynamically instructed to the data start point.

Referring to the drawings in more detail, in the example of FIG. 38, the total system bandwidth 3810 is divided into four bandwidth parts, that is, bandwidth part # 1 3802, bandwidth part # 2 3803, and bandwidth part #. 3 (3804) and bandwidth portion # 4 (3805).

Each bandwidth portion 3802, 3803, 3804, 3805 may be semi-statically set to have a specific data start point, and the corresponding setting may be instructed to the terminal. As described in the embodiment of the present invention, the data start point that is semi-statically set may be set in consideration of the length of the resource region according to the existence of the resource region in the corresponding bandwidth portion.

For example, in FIG. 38, the quasi-static data starting point in the bandwidth portion # 1 3802 and the bandwidth portion # 2 3803 is the control region length # 1 (3840) of the control region # 1 3840 existing in the corresponding bandwidth portion. In consideration of this, the third OFDM symbol 3808 may be set. The data starting point in bandwidth portion # 3 3804 may be set as the first OFDM symbol, and the data starting point in bandwidth portion # 4 3805 may be set as the second OFDM symbol.

In embodiments 3-4 of the present invention, some of the bandwidth parts may be additionally configured to support the dynamic indicator for the data start point.

In the example of FIG. 38, the bandwidth portion # 1 3802 and the bandwidth portion # 2 3803 are configured to support a dynamic indicator for a data start point.

In the case of the PDSCH 3801 transmitted to the bandwidth portion # 1 3802 or the bandwidth portion # 2 3803, information about a data start point may be dynamically indicated. For example, as described above, the quasi-static data start point of the bandwidth portion # 2 3803 may be set to the third OFDM symbol 3808. If the bandwidth portion # 2 3803 is set to support the dynamic data start point indicator 3806, the PDSCH 3801 in the bandwidth portion is free to consider the resource reuse in the resource region # 1 3840. Allocation can be performed. For example, the start point of PDSCH 3801 in bandwidth portion # 2 3803 can be dynamically scheduled to the second OFDM symbol 3809, and the base station can be connected to the data start point in bandwidth portion # 2 3803 via DCI. Can send an additional indicator.

Whether to support the dynamic indicator for the data start point for a particular bandwidth portion may be delivered to the terminal through higher layer signaling, such as RRC signaling or MAC CE signaling. Or it may be implicitly known based on the configuration information of the resource zone. For example, in FIG. 38, when the control region # 1 3840 is configured for the terminal # 1, the bandwidth portion # 1 3802 and the bandwidth portion # 2 3803 that are the bandwidth portions where the control region # 1 3840 exists are located. Can be set implicitly to send dynamic indicators. Since time and frequency resource information for the control region # 1 3840 is already known to the terminal # 1, when the PDSCH 3801 of the terminal # 1 is transmitted, resource sharing in the control region # 1 3840 is more actively performed. Resource efficiency can be increased by using Therefore, in order to support this, it may be desirable to configure the bandwidth portion # 1 3802 and the bandwidth portion # 2 3803 to transmit a dynamic indicator for the data start point.

If the dynamic indicator is transmitted in the bandwidth portion configured to transmit the dynamic indicator, the terminal may ignore the previously set quasi-static indicator and apply the dynamic indicator first to determine the data start point.

Even if the bandwidth part configured to transmit the dynamic indicator can be transmitted only when the dynamic indicator is needed. For example, when the data start point indicated by the dynamic indicator and the data start point indicated by the quasi-static indicator may not be transmitted. In this case, the terminal may determine a data start point by applying a previously set quasi-static indicator as it is. In this case, an additional field indicating whether the dynamic indicator is transmitted to the DCI may be required, and the number of bits corresponding to part or all of the dynamically set bandwidth part may be required. If the dynamic indicator is not sent, unused DCI bits may be reserved as is or used for other purposes.

Embodiment 3-4 of the present invention may include an operation of indicating one data start point for one PDSCH 3801. For example, if the number of bandwidth parts is set to one, one indicator may be set dynamically or semi-statically for a data start point.

39A and 39B are diagrams illustrating operations of a base station and a terminal according to Embodiments 3-4 of the present invention.

First, the procedure of the base station in FIG. 39A will be described.

The base station may transmit configuration information on the bandwidth portion in step 3901 and transmit quasi-static data start point information in each bandwidth portion in step 3902.

In step 3903, the base station may set a specific bandwidth portion to transmit the dynamic indicator for the data start point, and transmit the configuration information about this to the terminal.

The base station performs resource allocation for the downlink control channel in step 3904.

The base station may perform resource allocation for the data channel in step 3905. At this time, the base station may perform resource allocation for the data channel based on the resource sharing method of the data channel and the control channel according to the embodiment 3-4 of the present invention described above. That is, the base station may schedule by applying different data start points according to the frequency domain to which the data channel is allocated. If the frequency position to which the data channel is to be scheduled belongs to a bandwidth portion that transmits a quasi-static indicator for the data start point, the data channel may be scheduled according to a preset quasi-static data start point. If the frequency position to which the data channel is to be scheduled belongs to a bandwidth portion for transmitting the dynamic indicator for the data start point, the data channel may be scheduled to various data start points according to the determination of the base station.

In step 3906, the base station determines whether the frequency band in which the data channel or part of the data channel is scheduled is a portion of the bandwidth set for dynamic indicator transmission. If the bandwidth portion is set to the dynamic indicator transmission, the base station may additionally transmit a data start point indicator for the bandwidth portion in step 3907. The base station may transmit a downlink control channel and a data channel in step 3908.

Next, the terminal procedure will be described with reference to FIG. 39B.

In step 3911, the terminal may receive configuration information on the bandwidth portion. In step 3912, the terminal may receive quasi-static data starting point information for each bandwidth portion.

In step 3913, the terminal may receive configuration information on a specific bandwidth portion in which the dynamic indicator for the data start point is transmitted.

The UE may acquire the DCI after decoding the downlink control channel in step 3914. In step 3915, the UE may acquire resource allocation information for the downlink data channel from the DCI.

In step 3916, the terminal determines whether the frequency band in which the data channel or a part of the data channel is scheduled is a bandwidth part set to the dynamic indicator transmission. If the corresponding bandwidth portion is set to the dynamic indicator transmission, the UE can dynamically obtain a data start point indicator for the corresponding bandwidth portion from the DCI in step 3917, and apply it. If the bandwidth portion is not set to the dynamic indicator transmission, the terminal may apply the data start point for the bandwidth portion as a quasi-static data start point in step 3918.

When the determination of the data start point is finished, the terminal may decode the data channel in step 3919.

<Example 3-4-1>

As a method of setting a data start point at each frequency position to which a PDSCH is assigned in the third embodiment of the present invention, the base station instructs the terminal of all (or required part) control region setting information in the system. can do. More specifically, in FIG. 38, the base station may inform the terminal # 1 of the configuration information of the control area # 1 3840 and the control area # 2 3850, that is, time and frequency resource information. In this case, the dynamic / quasi-static indicator transmission setting for the data start point may be set for each resource region instead of for each bandwidth portion. For example, the resource region # 1 3840 may be set to the dynamic indicator transmission, and the resource region # 2 3850 may be set to the quasi-static indicator transmission. As a result, in all operations of the third to fourth embodiments, the bandwidth portion may be replaced for each resource region and applied in the same manner.

<Example 3-4-2>

In the 3-4-2 embodiment of the present invention, in the resource sharing method of a data channel and a control channel according to the embodiment 3-4 of the present invention, the present invention relates to a bandwidth portion set to dynamic signaling for a data start point. Embodiment 3-2 may be applied.

For example, the third embodiment may be applied to a part of the PDSCH 3801 that is transmitted to the bandwidth portion # 2 3803 set to dynamic indicator transmission in FIG. 39. That is, a part of the PDSCH 3801 transmitted to the bandwidth part # 2 3803 may be divided into data parts again, and a plurality of data start point indicators corresponding to the respective data parts may be transmitted. According to an embodiment of the present invention, the resource reuse efficiency for the resource region # 1 3860 existing in the bandwidth portion # 2 3803 may be increased.

<Example 3-4-3>

In the 3-4-3 embodiment of the present invention, in the resource sharing method of the data channel and the control channel according to the embodiment 3-4 of the present invention, quasi-static / dynamic signaling of a data start point is performed in various ways. can be / off On / off operations may be applied to the overall system bandwidth 3810 or to specific bandwidth portions 3802, 3803, 3804, 3805. Alternatively, the on / off operation may be applied to the dynamically set bandwidth portions 3802 and 3803 or the statically set bandwidth portions 3804 and 3805. The on / off operation may be dynamically configured through DCI or semi-statically through higher layer signaling such as RRC signaling and MAC CE signaling.

<3-5 Example>

40 is a diagram illustrating an example of a method of sharing resources between a data channel and a control channel according to embodiment 3-5 of the present invention. In the third embodiment of the present invention, a situation in which a plurality of terminals exist in the system, a plurality of resource regions are set, and a data channel of a specific terminal is transmitted is considered. The illustrated diagram of FIG. 40 shows one example of possible examples that can be generally represented.

In FIG. 40, two control regions, that is, control region # 1 4040 and control region # 2 4050, are set in the time and frequency resources of the system bandwidth 4010 on the frequency axis and one slot 4020 on the time axis. An example is shown.

40, the control region length of the control region # 1 4040 is set to the control region length # 1 4060, and the control region length of the control region # 2 4050 is set to the control region length # 2 4070. It is.

Referring to FIG. 40, the control region # 1 4040 is set to the terminal # 1, and the control region # 1 4040 and the control region # 2 4050 are different terminals, for example, the terminal # 2. Let's assume the situation is set. In FIG. 40, DCI # 1 4002, which is a control signal for terminal # 1, is transmitted from control area # 1 4030, and DCI # 2 4003, which is a control signal for terminal # 2, is controlled area # 1. Assume that the situation is transmitted from the 3340 and the control area # 2 (3350).

In the control region # 1 4040 and the control region # 2 4050, there may be resources 4004 that are not used for transmission of the DCI # 1 4002 and the DCI # 2 4003. In FIG. 40, it is assumed that PDSCH # 1 4001, which is a data channel for UE # 1, is transmitted. 40 is only an example for convenience in describing the present invention, it should be noted that this does not limit the present invention to a specific situation. The same can be applied in various transmission environments with a slight modification without departing from the scope of the present invention.

Embodiment 3-5 of the present invention can support more flexible resource sharing between a data channel and a control channel in a specific resource region existing in a system with relatively low signaling overhead. In an embodiment 3-5 of the present invention, a specific resource region may be partitioned into a plurality of control resource set parts, and whether DCI of another terminal is transmitted in each resource region part. Can be indicated.

In the resource region portion in which the DCI of another terminal is not transmitted, the data channel may be scheduled from the first OFDM symbol. The resource region portion in which the DCI of another terminal is transmitted may have a data start point instead of the first OFDM symbol. For example, the (resource region length + 1) th symbol of the corresponding resource region may be the data start point. As a result, a data channel may have one or more data start points, depending on the frequency position being scheduled.

It will be described in more detail with reference to the drawings. 40 shows an example in which PDSCH # 1 4001 of UE # 1 is scheduled and transmitted in a frequency domain in which resource region # 1 4040 is set. The terminal # 1 knows the setting information of the resource region # 1 4040 in advance, and thus, the information about the frequency position of the resource region # 1 4040 and the resource region length # 1 4060. In addition, the DCI # 1 4002 of the terminal # 1 may be transmitted to a specific resource of the resource region # 1 4040, and the terminal # 1 may obtain the transmission resource of the DCI # 1 4002 through blind decoding. .

According to the third embodiment of the present invention, the resource region # 1 4040 includes a plurality of resource region portions, for example, resource region portion # 1 4041, resource region portion # 2 4042, and resource region portion #. May be subdivided into three (4043). In each resource region portion 4041, 4042, 4043, whether the DCI of another terminal is actually transmitted may be known to the terminal using, for example, 1 bit (or a plurality of bits).

In the example of FIG. 40, since only the DCI # 1 4002 of the terminal # 1 is transmitted in the resource region part # 1 4041, the base station may inform the terminal # 1 that the DCI of the other terminal is not transmitted. . In addition, since the DCI # 2 4003 of the terminal # 2 is transmitted in the resource region portion # 2 4042 and the resource region portion # 3 4043, the base station transmits the DCI of the other terminal to the terminal # 1. Can tell.

UE # 1 may determine a data start point based on a DCI transmission indicator for another UE transmitted from each resource region portion. For example, in the example of FIG. 40, since the UE knows that the DCI of the other UE is not transmitted, the PDSCH # 1 (referred to as the PDSCH # 1 ( It may be assumed that a part of 4001 is a data start point from the first OFDM symbol. At this time, since UE # 1 knows the transmission resource of DCI # 1 4001, it can be known that a part of PDSCH # 1 4001 in resource region part # 1 4041 has been rate matched. Based on the decoding can be performed.

On the other hand, since the terminal has received information that the DCI of the other terminal is being transmitted in the resource region part # 2 (4042) and the resource region part # 3 (4043), the resource region part # 2 (4042) and the resource region part # 3 Some of the PDSCH # 1 4001 transmitted at the frequency location of 4043 may have other data start points applied. For example, since the terminal # 1 knows the information about the resource region length # 1 4060 in advance, a part of the PDSCH # 1 4001 transmitted from the resource region portion # 2 4042 and the resource region portion # 3 4043. It can be assumed that the data start point for the (resource region length # 1 (4060) + 1) th OFDM symbol.

In the above-described embodiments of the third to fifth embodiments of the present invention, the configuration information (for example, the number of resource region portions) for the resource region portion may be a value promised as a system parameter. Alternatively, it may be implicitly determined by other system parameters, for example, system bandwidth, number of resource zones set, setting information of resource zones (frequency bandwidth of resource zone, resource zone length), and the like. Alternatively, the terminal may be known to the terminal as MIB or SIB as cell common system information. Alternatively, the terminal may be semi-statically configured through higher layer signaling such as RRC signaling and MAC CE signaling. DCI transmission of the other terminal in each of the resource region parts 4041, 4042, 4043 may be transmitted to the terminal through DCI.

In the above-described embodiment 3-5 of the present invention, signaling of whether DCI transmission of another terminal transmitted for each resource region part may be replaced with signaling indicating a substantial data start point. In this case, the resource region may be reused more efficiently, but signaling overhead may increase. In addition, a data start point according to whether DCI is transmitted may be divided into, for example, a first data start point and a second data start point, and a value for each data start point may be semi-statically set or a fixed value may be used.

In the above-described embodiment 3-5 of the present invention, a specific resource region to which the embodiment 3-5 is applied may be additionally set. For example, it is possible to set not only a resource region preset to a specific terminal, but also an indicator of whether to transmit a DCI of another terminal to another resource region.

For example, in FIG. 40, the resource region # 2 4050 may also be configured to apply the third embodiment, and for this purpose, the terminal # 1 may be previously informed of the setting information on the resource region # 2 4050.

In the above-described embodiments of the third to fifth embodiments of the present invention, various embodiments of the present invention described above, for example, the third-2, to the bandwidth portion in which a resource region that is not set by a specific terminal in the system exist. The data start point may be determined in combination with the embodiments, the third to third embodiments, and the third to third embodiments.

41A and 41B are diagrams illustrating operations of a base station and a terminal according to Embodiment 3-5 of the present invention.

First, the base station procedure will be described.

In step 4101, the base station may transmit resource region partial setting information for a specific resource region to the terminal.

The base station may perform resource allocation for the downlink control channel in step 4102. In step 4103, the base station may transmit an indicator indicating whether DCI of another terminal in each resource region portion is transmitted.

The base station may perform resource allocation for the downlink data channel in step 4103. At this time, the base station may perform resource allocation for the data channel based on the resource sharing method of the data channel and the control channel according to the embodiment 3-5 of the present invention described above. That is, the base station may apply scheduling according to different data start points according to which resource region part the data channel is transmitted and whether the DCI of another terminal is transmitted in the corresponding resource region part. For example, the base station may apply the first data start point in the resource region portion in which the DCI of another terminal is not transmitted, and apply the second data start point in the resource region portion in which the DCI of another terminal is transmitted.

The base station may perform transmission on the downlink control channel and the data channel in step 4105.

Next, the terminal procedure will be described.

In step 4111, the terminal may receive resource region partial setting information for a specific resource region. In step 4112, the UE decodes the downlink control channel and obtains a DCI. In step 4113, the UE acquires resource allocation information for the downlink data channel.

In step 4114, the UE may acquire information on whether DCI of another UE is transmitted in each resource region portion.

In step 4115, the terminal may determine whether the DCI of the other terminal is transmitted for the resource region corresponding to the frequency location where the data channel is scheduled.

If the DCI of another terminal is not transmitted in the resource region portion, the first data start point may be applied to the data channel or data channel portion at the corresponding position. If the DCI of another terminal is transmitted in the corresponding resource region portion, the second data start point may be applied to the data channel or the data channel portion at the corresponding position.

The terminal may perform decoding on the downlink data channel based on the scheduling information finally obtained in step 4118.

<Example 3-6>

Embodiment 3-6 provides an implicit signaling method for efficiently sharing resources between a data channel and a control channel. The terminal may implicitly determine the data start point in various ways. For example, resource region transmission method setting information (intensive transmission or distributed transmission), resource mapping method setting information (frequency-priority mapping or time-priority mapping) of resource region, aggregation level supported by resource region (e.g. higher aggregation level) Information), and information such as setting a search space of a resource area (common search space or terminal-specific search space) may be used to implicitly indicate a data start point.

For example, when a resource region is configured in a distributed mapping scheme, resource sharing between a data channel and a control channel in the corresponding resource region may be applied with a very low probability. Therefore, it may be efficient to make a promise between the base station and the terminal so as not to share resources in the resource region for the resource region that is systematically set to distributed mapping. Therefore, if the UE is scheduled at the same frequency position as the resource region set by the distributed mapping, the UE may implicitly know that the data start point at the frequency position is the (resource region length + 1) th symbol. .

The data start point described above may be interpreted in the same manner as the indicator indicating whether the data channel is rate matching in the method of sharing the resources of the data channel and the control channel. For example, assume that a control channel (control resource set, CORESET, resource region) is set as the nth OFDM symbol in the first OFDM symbol and assigned to a specific frequency band as a control channel. Indicating a data start point as an n + 1 th symbol for a data channel transmitted in a corresponding frequency band means that the data channel is not sent to the corresponding control region, which means that the PDSCH is transmitted by rate matching the corresponding control region. Same as

Alternatively, indicating a data start point of a data channel transmitted in a frequency band set as a control region with a first OFDM symbol means sending a data channel to a corresponding control region, which does not rate match the PDSCH for the control region. Same as sent.

That is, whether or not rate matching for the PDSCH in the control region may be indicated by 1 bit, which may be interpreted in the same manner as the indicator for the data start point of the 1st OFDM symbol or the n + 1th OFDM symbol.

So far, various embodiments of the present invention have been described with respect to a method in which a data channel and a control channel share resources and various signaling methods for efficiently supporting the same. One or more embodiments of the present invention may be used independently in each system or used in combination with each other simultaneously.

For example, in the control region in which the third to third embodiments of the present invention are combined with the third to fifth embodiments of the present invention, the third to fifth embodiments are applied to the bandwidth portions in which the control region is not set. 3-3 embodiments can be applied. The embodiments of the present invention are merely given specific examples to easily explain the technical contents of the present invention and to help the understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented. In addition, each of the above embodiments can be combined with each other if necessary to operate.

<Example 3-7>

Embodiments 3-7 of the present invention provide a method for efficiently sharing resources between a data channel and a control channel.

The base station can inform the terminal of time and frequency resources for one or a plurality of control regions (control resource set, CORESET, resource region) for the terminal to receive the downlink control channel, which is through higher layer signaling such as RRC signaling Can be known.

For example, in FIG. 40, the base station may inform the terminal # 1 of configuration information (eg, time and frequency resources) for the control region # 1 4040, and the terminal # 1 may transmit its downlink from the control region # 1 4040. Control information can be received.

In describing the present invention, for convenience, the control area of the terminal itself described above is called a “first control area”.

When a base station transmits a PDSCH of a terminal, when the time / frequency resource to which the PDSCH is allocated includes a part or all of the “first control region”, the base station selects the PDSCH from the time / frequency resource corresponding to the “first control region”. It can be transmitted by rate matching without transmitting.

When a base station transmits a PDSCH of a terminal, when the time / frequency resource to which the PDSCH is allocated includes a part or all of the “first control region”, the base station may select the PDSCH even in the time / frequency resource corresponding to the “first control region”. Can transmit without rate matching. If the time / frequency resource to which the PDSCH is allocated includes a part or all of the time / frequency resources to which the DCI of the UE is transmitted, the base station rate matching the PDSCH to the time / frequency resources to which the corresponding DCI is transmitted. Can be sent.

The base station may transmit an indicator indicating whether the rate matching for the "first control region" described above to the terminal. For example, if one or a plurality of "first control regions" are known to the UE, whether to perform transmission or rate matching on the assigned PDSCH including some or all of the "first control regions" It may transmit an indicator indicating whether to transmit (but transmit rate matching for the time / frequency resources in which the DCI of the UE is transmitted). For example, if N (N≥1) "first control regions" are known, the base station may instruct the terminal to use the N-bit indicators to indicate the contents.

The indicator may be transmitted in higher layer signaling (eg, RRC signaling or MAC CE signaling), common DCI, group-common DCI, or UE-specific DCI.

The UE may receive resource allocation information for its PDSCH from downlink control information, and if the time / frequency resource to which its PDSCH is allocated includes some or all of the “first control region”, Depending on the content, different PDSCH decoding operations may be performed.

If the UE receives an indicator that the UE performs rate matching with respect to a specific “first control region”, the UE receives a PDSCH in a time / frequency resource corresponding to the “first control region” with respect to the received PDSCH. It may be assumed that the data is transmitted by rate matching instead of transmission. Accordingly, the UE may decode the PDSCH of the remaining regions except for the “first control region”.

If the UE receives an indicator indicating that the UE transmits a specific “first control region” without performing rate matching, the UE receives the PDSCH even in time / frequency resources corresponding to the “first control region” with respect to the received PDSCH. Can be assumed to be transmitted, and thus can decode the PDSCH. However, if the time / frequency resource to which the PDSCH is allocated includes a part or all of the time / frequency resource to which the DCI of the corresponding UE is transmitted, the UE transmits the PDSCH rate matching with respect to the time / frequency resource to which the corresponding DCI is transmitted. In this case, decoding of the PDSCH in the remaining resource regions other than the region in which the corresponding DCI is transmitted may be performed.

The base station may additionally inform the terminal of time and frequency resources for one or more control regions configured for the system bandwidth or other terminals existing within the bandwidth of the terminal, which are known or common through higher layer signaling such as RRC signaling. It can be known via DCI or group-common DCI.

For example, in FIG. 40, when the control area # 1 4040 is set as the control area for the terminal # 1, and the control area # 2 4050 is set as the control area for the terminal # 2, the base station sets the control area #. Time and frequency resources of the second (4050) may be additionally informed to the terminal # 1.

In describing the present invention, for convenience, a time frequency resource of a control region set for another terminal described above is called a “second control region”.

When a base station transmits a PDSCH of a terminal, when the time / frequency resource to which the PDSCH is allocated includes a part or all of the “second control region”, the base station selects the PDSCH from the time / frequency resource corresponding to the “second control region”. It can be transmitted by rate matching without transmitting.

Alternatively, when the base station transmits a PDSCH of a certain terminal, when the time / frequency resource to which the PDSCH is allocated includes a part or all of the “second control region”, the base station also transmits the PDSCH even in the time / frequency resource corresponding to the “second control region”. Can be transmitted without rate matching.

The base station may transmit an indicator indicating whether the rate matching for the "second control region" described above to the terminal. For example, when one or a plurality of "second control regions" are known to the UE, the base station performs transmission or rate matching on the PDSCH allocated to the allocated PDSCH including some or all of the "second control regions". An indicator indicating whether to transmit without performing the operation may be transmitted. For example, when M (M≥1) "second control regions" are known, the base station may instruct the terminal using an M bit indicator.

The indicator may be transmitted in higher layer signaling (eg, RRC signaling or MAC CE signaling), common DCI, group-common DCI, or UE-specific DCI.

The UE may receive resource allocation information for its PDSCH from downlink control information, and if the time / frequency resource to which its PDSCH is allocated includes some or all of the “second control region”, Depending on the content, different PDSCH decoding operations may be performed.

If the UE receives an indicator indicating that the UE performs rate matching with respect to a specific “second control region”, the UE receives a PDSCH in a time / frequency resource corresponding to the “second control region” with respect to the received PDSCH. It may be assumed that the data is transmitted by rate matching instead of transmission. Accordingly, the terminal may decode the PDSCH of the remaining regions except for the “second control region”.

If the UE receives an indicator indicating that the UE transmits a specific “second control region” without performing rate matching, the UE may also use the PDSCH even in time / frequency resources corresponding to the “second control region” with respect to the received PDSCH. Can be assumed to be transmitted, and thus can decode the PDSCH.

An understanding of the "first control region" and the "second control region" described above may be terminal-specific. In the example illustrated in FIG. 40, the “first control region” of the terminal # 1 may be the control region # 1 4040, and the “first control region” of the terminal # 2 may be the control region # 2 4050. In addition, the “second control area” of the terminal # 1 may be the control area # 2 4050, and the “second control area” of the terminal # 1 may be the control area # 1 4040.

The “second control region” described above may be the same as a reserved resource for the corresponding terminal. The UE may assume that there is no transmission in the reserved resource. However, whether to enable or disable the reserved resource may be performed through the indicator described above.

<Example 3-7-1>

When one or more control regions exist in the system band or the terminal band, the base station determines whether or not the time / frequency resource set as the control region can be used for PDSCH transmission (or equally, rate matching of PDSCH in the corresponding resource region). Whether or not). The base station may inform the one or more terminals through the common DCI or the group-common DCI. For example, if L (L≥1) control regions are known, the base station may instruct the terminal to use the L bit indicator to indicate the contents.

For example, as shown in the example of FIG. 40, a common DCI or group in which two control regions, namely, control region # 1 4040 and control region # 2 4050, exist in the system bandwidth and the terminal # 1 and the terminal # 2 are identical to each other. When receiving the common DCI, the base station determines whether the control area can use the allocated time / frequency resources for PDSCH transmission or not for higher layer signaling (e.g., RRC signaling or MAC CE signaling) to the terminal # 1 and the terminal # 2. ), Or via a common DCI or a group-common DCI.

The UE may receive the indicator through higher layer signaling or common DCI or group-common DCI, and acquires PDSCH rate matching information on time / frequency resources set for each control region existing in the system band or in the UE band. can do. When the UE receives its PDSCH, the UE may receive and decode the PDSCH in consideration of rate matching with respect to a control region using the information.

<Example 3-7-2>

When one or more control regions exist in the system band or the terminal band, the base station determines whether or not the time / frequency resource set as the control region can be used for PDSCH transmission (or equally, rate matching of PDSCH in the corresponding resource region). Whether or not). The base station may inform the one or more terminals through the higher layer signaling (eg, RRC signaling or MAC CE signaling), common DCI or group-common DCI. For example, if L (L≥1) control regions are known, the base station can instruct the terminal using the L bit indicator to indicate the contents.

For example, as shown in the example of FIG. 40, a common DCI or group in which two control regions, namely, control region # 1 4040 and control region # 2 4050, exist in the system bandwidth and the terminal # 1 and the terminal # 2 are identical to each other. When receiving a common DCI, the base station determines whether higher-level signaling (eg, RRC signaling or MAC CE signaling) to the terminal # 1 and the terminal # 2 whether or not each control region can use the allocated time / frequency resources for PDSCH transmission. Or via a common DCI or group-common DCI.

The indicator is named as the first indicator.

In addition, the base station additionally indicates to the UE whether or not the time / frequency resource set as the “first control region” of the UE is available for PDSCH transmission (or whether the PDSCH is rate matching in the corresponding resource region) to the specific UE. I can tell you. The base station may transmit the information to each terminal using a terminal-specific DCI.

For example, in the example of FIG. 40, when the "first control region" of the terminal # 1 is the control region # 1 4040 and the "first control region" of the terminal # 2 is the control region # 2 4050, the base station Indicates to the terminal-specific DCI an indicator indicating whether or not the time / frequency resource of the control region # 1 4040 is available for PDSCH transmission (or similarly, whether the PDSCH is rate matching in the corresponding resource region). And indicating whether or not the time / frequency resource of the control region # 2 4050 can be used for PDSCH transmission (or similarly, whether the PDSCH is rate matching in the corresponding resource region). Can transmit to a specific DCI.

The indicator is named as the second indicator.

The base station may transmit the first indicator, the second indicator, or both the first indicator and the second indicator to the terminal.

The terminal may receive the first indicator, the second indicator, or both the first indicator and the second indicator described above from the base station.

The terminal may receive the first indicator from the base station through higher layer signaling, common DCI, or group-common DCI, and PDSCH rate matching for time / frequency resources configured for each control region existing in the system band or the terminal band. Whether or not information can be obtained. When the UE receives its PDSCH, the UE may receive and decode the PDSCH in consideration of rate matching with respect to a control region using the information.

The terminal may receive a second indicator from the base station through the terminal-specific DCI, and may obtain PDSCH rate matching information on time / frequency resources set as the first control region. When the UE receives its PDSCH, the UE may receive and decode the PDSCH by considering the PDSCH rate matching with respect to the resource region set as the first control region using the information.

The terminal may receive both the first indicator and the second indicator from the base station.

The UE may obtain information on whether PDSCH rate matching for each control region existing in the system band or the UE band from the first indicator. The UE may obtain information on whether the PDSCH rate matching for the [first control region] from the second indicator.

In this case, the terminal may determine whether the PDSCH rate matching for the control region corresponding to the first control region of the terminal among the control region existing in the system according to the second indicator. That is, when the terminal receives both the first indicator and the second indicator, the terminal may follow the second indicator in determining whether the PDSCH rate matching for the first control region.

This will be described in detail with reference to the drawing of FIG. 40. In FIG. 40, UE # 1 cannot use a time / frequency resource region set from the base station to control region # 1 4040 and control region # 2 4050 for PDSCH transmission (that is, rate for PDSCH transmission in the corresponding resource region). performing matching) may be received through the first indicator.

Also, the terminal # 1 may use the time / frequency resource region set as the control region # 1 4040, which is the first control region of the terminal # 1, for the PDSCH transmission through the second indicator (that is, the PDSCH transmission in the corresponding resource region). Not perform rate matching with respect to the second indicator.

In this case, indicators indicating PDSCH rate matching of the control region # 1 4040 are different from each other, and at this time, the UE receives the PDSCH without performing PDSCH rate matching on the control region # 1 4040 according to the information of the second indicator. And decoding can be performed.

<Example 3-7-3>

The base station may transmit a second indicator for the first resource region described above to the terminal.

The base station may inform the terminal of the time / frequency resource region for the second resource region through higher layer signaling, for example, RRC signaling. In the PDSCH transmission to the terminal, when the PDSCH transmission resource overlaps the resource region set as the second resource region, the base station may transmit the PDSCH by performing rate matching on the region.

The UE may receive a second indicator from the base station, and may know whether the PDSCH is rate matching with respect to the first resource region, and thus may receive and decode the PDSCH. The UE may receive a time / frequency region for the second resource region from the base station through higher layer signaling (for example, RRC signaling), and may assume that the PDSCH is always rate matched in the second resource region. Receive and decode.

<Example 3-8>

Embodiment 3-8 provides a method of mapping data to a data channel when the above-described resource sharing method of the various data channels and the control channel is applied. As described above, one data channel may have a plurality of data start points according to the allocated frequency position according to the resource sharing method of the data channel and the control channel. At this time, the following alternatives can be considered as a method of mapping data to the data channel.

[Method # 1]

Data may be sequentially mapped from the first OFDM symbol in chronological order irrespective of the data start point of each part of the data channel. In this case, data may be mapped with priority in each OFDM symbol.

[Method # 2]

Data may be sequentially mapped from the lowest or highest frequency position in consideration of the data start point and frequency allocation information of each part of the data channel. In this case, data may be mapped in a frequency-priority or a time-priority within each frequency domain.

<Example 3-9>

Embodiment 3-9 of the present invention describes a method of performing rate matching of data channels when the above-described resource sharing method of various data channels and control channels is applied.

When the base station performs resource allocation for the PDSCH of a certain terminal, the base station may allocate and transmit time / frequency resources set as a control area (CORESET) of the corresponding terminal while reusing them. At this time, all or part of the time / frequency domain to which the PDSCH is to be allocated may overlap with the time / frequency resource to which the DCI of the corresponding UE is mapped. As described above, when the PDSCH transmission resource and the DCI transmission resource overlap, the base station and the terminal may perform the following operation.

[Action # 1]

When the base station performs resource allocation for the PDSCH, if the resource to be transmitted to the PDSCH and the resource to transmit the DCI overlap, and if the DCI is DCI including scheduling information for the PDSCH, the overlapped transmission resources The PDSCH may be rate-matched to allocate resources for transmission.

The UE may obtain the DCI by performing blind decoding on the PDCCH, and may obtain scheduling information on the corresponding PDSCH from this. In this case, when the received PDSCH transmission resource and the DCI transmission resource overlap, and when the DCI is a DCI including scheduling information for the PDSCH, the UE is assumed that the PDSCH is rate-matched with respect to the overlapping transmission resources. And then perform a decoding operation.

[Action # 2]

When the BS performs resource allocation for the PDSCH, when the resource to be transmitted to the PDSCH and the resource to transmit the DCI overlap, and the corresponding DCI is not the DCI including the scheduling information for the PDSCH, the overlapped transmission A PDSCH may be punctured for a resource to allocate and transmit the resource.

The UE may obtain the DCI by performing blind decoding on the PDCCH, and may obtain scheduling information on the corresponding PDSCH from this. In this case, when the received PDSCH transmission resource and the DCI transmission resource overlap, and when the DCI is not the DCI including the scheduling information for the PDSCH, the UE assumes that the PDSCH is puncturing for the overlapping transmission resources. And then perform a decoding operation.

42 and 43 illustrate a transmitter, a receiver, and a controller of a terminal and a base station to perform the above embodiments of the present invention. In the 5G communication system corresponding to the above embodiments, a method of sharing a resource between a data channel and a control channel, a method of designating a data start point, and a structure of a base station and a terminal that perform various signaling for this are illustrated. To do this, the transmitter, the receiver, and the processor of the base station and the terminal must operate according to embodiments.

42 is a block diagram illustrating an internal structure of a terminal according to an embodiment of the present invention.

As illustrated in FIG. 42, the terminal of the present invention may include a terminal processor 4201, a receiver 4202, and a transmitter 4203.

The terminal processor 4201 may control a series of processes in which the terminal may operate according to the above-described embodiment of the present invention.

For example, the terminal processor 4201 may include information on a resource sharing method, a data starting point setting method, a resource region setting method, a bandwidth part setting method, a resource area part setting method, and the like, of a data channel and a control channel according to an embodiment of the present invention. Accordingly, the decoding operation for the downlink control channel and the data channel of the terminal can be controlled differently.

The terminal receiver 4202 and the terminal may collectively be referred to as a transmitter / receiver in the embodiment of the present invention. The transceiver may transmit and receive a signal with the base station. The signal may include control information and data. To this end, the transmission and reception unit may be composed of an RF transmitter for up-converting and amplifying the frequency of the transmitted signal, and an RF receiver for low noise amplifying and down-converting the received signal. In addition, the transceiver may receive a signal through a wireless channel, output the signal to the terminal processor 4201, and transmit a signal output from the terminal processor 4201 through a wireless channel.

43 is a block diagram illustrating an internal structure of a base station according to an embodiment of the present invention.

As shown in FIG. 43, the base station of the present invention may include a base station processor 4301, a receiver 4302, and a transmitter 4303.

The base station processor 4301 may control a series of processes to operate the base station according to the above-described embodiment of the present invention. For example, the base station processor 4301 differently controls according to a resource sharing method, a data start point setting method, a resource region setting method, a bandwidth part setting method, a resource area part setting method, and the like, according to an embodiment of the present invention. can do. In addition, the base station processor 4301 may control to transmit various additional indicators as necessary.

The base station receiver 4302 and the base station transmitter 4303 may be collectively referred to as a transceiver. The transceiver may transmit and receive a signal with the terminal. The signal may include control information and data. To this end, the transmission and reception unit may be composed of an RF transmitter for up-converting and amplifying the frequency of the transmitted signal, and an RF receiver for low noise amplifying and down-converting the received signal. Also, the transceiver may receive a signal through a wireless channel, output the signal to the base station processor 4301, and transmit a signal output from the base station processor 4301 through the wireless channel.

On the other hand, in the drawings illustrating the method of the present invention, the order of description does not necessarily correspond to the order of execution, and the preceding and subsequent relationships may be changed or executed in parallel.

Alternatively, the drawings illustrating the method of the present invention may include some of the components and omit some of the components within the scope of not impairing the nature of the present invention.

In addition, the method of the present invention may be carried out in combination with some or all of the contents included in each embodiment without departing from the spirit of the invention.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented. In addition, each of the above embodiments can be combined with each other if necessary to operate.

Claims (15)

In the method of the terminal in a wireless communication system, Detecting a sync signal block at a sync signal block candidate position determined according to the subcarrier spacing of the sync signal block; And Performing synchronization based on the synchronization signal block. The method of claim 1, If the subcarrier spacing is 30kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20, And when the subcarrier spacing is 120 kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20. The method of claim 1, Checking frequency band information according to the detected sync signal block; The subcarrier interval applied to the control channel and the data channel is determined based on the frequency band information. The method of claim 1, The sync signal block is characterized by consisting of four symbols. A method of a base station in a wireless communication system, Transmitting a sync signal block at a sync signal block candidate position determined according to a subcarrier spacing of the sync signal block, Synchronization is performed based on the synchronization signal block. The method of claim 5, If the subcarrier spacing is 30kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20, And when the subcarrier spacing is 120 kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20. The method of claim 5, Frequency band information is confirmed according to the sync signal block, The subcarrier interval applied to the control channel and the data channel is determined based on the frequency band information. The method of claim 5, The sync signal block is characterized by consisting of four symbols. A terminal in a wireless communication system, A transceiver; And Detecting a sync signal block at a sync signal block candidate position determined according to the subcarrier spacing of the sync signal block, And a controller configured to perform synchronization based on the synchronization signal block. The method of claim 9, If the subcarrier spacing is 30kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20, And when the subcarrier spacing is 120 kHz, the index of the first symbol of the synchronization signal block candidate position is 4, 8, 16, or 20. The method of claim 9, The controller checks frequency band information according to the detected sync signal block, The subcarrier interval applied to the control channel and the data channel is determined based on the frequency band information. The method of claim 10, The synchronization signal block is characterized in that the terminal consists of four symbols. A base station in a wireless communication system, A transceiver; And A control unit for transmitting a sync signal block at a sync signal block candidate position determined according to a subcarrier spacing of the sync signal block, The base station, characterized in that the synchronization is performed based on the synchronization signal block. The method of claim 13, If the subcarrier spacing is 30kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20, And when the subcarrier spacing is 120 kHz, the index of the first symbol of the sync signal block candidate position is 4, 8, 16, 20. The method of claim 13, Frequency band information is confirmed according to the sync signal block, The subcarrier spacing applied to the control channel and the data channel is determined based on the frequency band information. The base station, characterized in that the synchronization signal block is composed of four symbols.

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