WO2020019322A1 - Information transmission method and apparatus - Google Patents

Abstract

Provided are an information transmission method and apparatus, the method comprising: a terminal device receives configuration information of a physical downlink control channel (PDCCH) sent by a network device, the configuration information comprising time-frequency resource information of a plurality of transmission units transmitting the PDCCH, the plurality of transmission units comprising a first transmission unit and a second transmission unit, the first transmission unit transmitting first downlink control information (DCI) and a first reference signal corresponding to the first transmission unit, the second transmission unit transmitting second DCI but not transmitting a second reference signal corresponding to the second transmission unit; according to the configuration information, the terminal device receives the first reference signal on the first transmission unit; according to the first reference signal, the terminal device determines first channel information corresponding to the first transmission unit; according to the first channel information, the terminal device determines second channel information corresponding to the second transmission unit. The information transmission method reduces overheads used for estimating reference signals of control channels, saves transmission resources, and enables more transmission resources to be used for transmitting control information, thereby increasing transmission resource utilisation and communication efficiency. The method is suitable for various over-the-air communication scenarios, such as unmanned aerial vehicles, hot air balloons, aerial cameras etc., and may be applied to various communication systems, such as MTC, IoT, LTE-M, M2M, Internet of Things etc.

Description

Method and device for information transmission Technical field

This application relates to the field of communications, and more specifically, to a method and device for information transmission.

Background technique

In the existing communication system, in order to improve the coverage performance of a physical downlink control channel (PDCCH), a time-domain repeated transmission method is used to implement diversity reception on the receiving side. The receiving side improves the PDCCH detection performance based on a certain combination mode. With the rise of ultra-reliable and low latency communications (URLLC) services in the fifth generation (5G) mobile communication system, the transmission of physical downlink control channels needs to meet both high reliability and low latency. Delay, the traditional time domain repetition scheme has become the bottleneck of low latency requirements. In addition, in the wireless communication scenarios of some aerial flying devices (such as drones, airplanes, balloons, and even satellites), the transmission environment between the flying device and the service node has almost no multipath transmission such as reflection and scattering, which makes the transmission channel Line-of-sight (LOS) transmission characteristics are basically satisfied. The line-of-sight transmission characteristics can be understood as that the wireless transmission channel basically meets the flatness of the time domain, frequency domain, and space domain. The flatness here can be understood as the channel characteristics are insensitive or almost unchanged in adjacent time domain, frequency domain or space domain resources. At present, in such an application scenario, the existing demodulation reference signal (DMRS) in different resources (time domain, frequency domain) when transmitting the control channel consumes a lot of transmission resources. Because the channel characteristics are basically unchanged, As a result, the demodulation reference signal of the transmission channel is redundant and the transmission resources are wasted. The resource utilization rate is low and the communication efficiency is low.

Summary of the Invention

This application provides a method and device for information transmission, which can reduce the reference signal overhead used to estimate the control channel, save some transmission resources, realize more transmission resources for transmitting control information, and improve the utilization rate of transmission resources. Improve communication efficiency.

In a first aspect, a method for information transmission is provided, including: a terminal device receiving configuration information of a physical downlink control channel PDCCH sent by a network device, the configuration information including time-frequency resource information of multiple transmission units transmitting the PDCCH, and Transmission units include a first transmission unit and a second transmission unit, the first transmission unit transmits a first downlink control information DCI and a first reference signal corresponding to the first transmission unit, and the second transmission unit transmits a second DCI , The second reference signal corresponding to the second transmission unit is not transmitted; the terminal device receives the first reference signal on the first transmission unit according to the configuration information; and the terminal device determines the first reference signal corresponding to the first reference signal according to the first reference signal First channel information corresponding to a transmission unit; the terminal device determines second channel information corresponding to the second transmission unit according to the first channel information.

The method for information transmission provided in the first aspect, when multiple transmission units repeatedly transmit the same PDCCH, the multiple transmission signals of the first transmission unit includes a downlink reference signal (first reference signal) corresponding to the DCI of the PDCCH, The transmission signal of the second transmission unit does not include a downlink reference signal (second reference signal) corresponding to the DCI of the PDCCH, and the terminal device determines a first transmission signal corresponding to the second transmission unit according to the first channel information corresponding to the first transmission unit. Two-channel information, thereby realizing estimation and coherent demodulation of channel information for determining a PDCCH transmitted by the second transmission unit. Because the second transmission unit does not need to transmit the second reference signal, the overhead of the reference signal used to estimate the control channel information is reduced, and some transmission resources can be saved. The second transmission unit may have more resources for transmitting control information, etc., and realize more transmission resources for transmitting control information, which improves the utilization rate of transmission resources and further improves communication efficiency.

In a possible implementation manner of the first aspect, the configuration information further includes instruction information, the instruction information is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the second transmission unit not to transmit. The second reference signal.

In a possible implementation manner of the first aspect, the indication information is a bitmap.

In a possible implementation manner of the first aspect, the terminal device determining the second channel information corresponding to the second transmission unit according to the first channel information includes: the terminal device determines the first channel information as the first channel information Two-channel information. In this implementation, sharing of channel information is achieved. It further saves reference signal resources, facilitates implementation, and improves resources used by the second transmission unit to transmit DCI. Further improve communication efficiency.

In a possible implementation manner of the first aspect, the first DCI and the second DCI are the same.

In a possible implementation manner of the first aspect, the frequency domain resources and / or time domain resources of the multiple transmission units are different, and the time domain resources of the multiple transmission units are time slots, subframes, and monitoring opportunities. Any one of the frequency domain resources of the multiple transmission units is a physical resource block.

In a possible implementation manner of the first aspect, the first transmission unit and the second transmission unit include at least one resource unit group REG, and the REG included in the first transmission unit and the second transmission unit is used for transmission. The number of resource element REs of the DCI is different from the symbol number and subcarrier number corresponding to the RE.

In a possible implementation manner of the first aspect, the first transmission unit and the second transmission unit include at least one control channel unit CCE, and the CCE included in the first transmission unit and the second transmission unit is used for transmission. The number of resource element REs of the DCI is different from the symbol number and subcarrier number corresponding to the RE.

In a possible implementation manner of the first aspect, the first reference signal and the second reference signal are demodulation reference signals DMRS.

In a second aspect, a method for information transmission is provided, including: network equipment generating configuration information of a physical downlink control channel PDCCH, the configuration information including time-frequency resource information of multiple transmission units transmitting the PDCCH, the multiple transmission units including A first transmission unit and a second transmission unit, the first transmission unit transmits a first downlink control information DCI and a first reference signal corresponding to the first transmission unit, and the second transmission unit transmits a second DCI without transmitting and A second reference signal corresponding to the second transmission unit; the network device sends the configuration information to the terminal device, and the configuration information is used by the terminal device to estimate the channel information of the PDCCH.

In the method for information transmission provided in the second aspect, when multiple transmission units repeatedly transmit the same PDCCH, multiple transmission signals of the first transmission unit include a downlink reference signal (first reference signal) corresponding to the DCI of the PDCCH, The downlink transmission signal (second reference signal) corresponding to the DCI of the PDCCH is not included in the transmission signal of the second transmission unit, and the second transmission unit corresponding to the second transmission unit may be determined according to the first channel information corresponding to the first transmission unit. The channel information is used to implement estimation and coherent demodulation of channel information for determining a PDCCH transmitted by the second transmission unit. Since the second transmission unit does not need to transmit the second reference signal, the reference signal overhead used to estimate the control channel is reduced, and some transmission resources can be saved. The second transmission unit may have more resources for transmitting control information, etc., and realize more transmission resources for transmitting control information, which improves the utilization rate of transmission resources and further improves communication efficiency.

In a possible implementation manner of the second aspect, the configuration information further includes indication information, where the indication information is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the second transmission unit not to transmit. The second reference signal.

In a possible implementation manner of the second aspect, the indication information is a bitmap.

In a possible implementation manner of the second aspect, the first channel information corresponding to the first transmission unit and the second channel information corresponding to the second transmission unit are the same.

In a possible implementation manner of the second aspect, the first DCI and the second DCI are the same.

In a possible implementation manner of the second aspect, the frequency domain resources and / or time domain resources of the multiple transmission units are different. The time domain resources of the multiple transmission units are time slots, subframes, and monitoring opportunities. Any one of the frequency domain resources of the multiple transmission units is a physical resource block.

In a possible implementation manner of the second aspect, the first transmission unit and the second transmission unit include at least one resource unit group REG, and the REG included in the first transmission unit and the second transmission unit is used for transmission. The number of resource element REs of the DCI is different from the symbol number and subcarrier number corresponding to the RE.

In a possible implementation manner of the second aspect, the first transmission unit and the second transmission unit include at least one control channel unit CCE, and the CCE included in the first transmission unit and the second transmission unit is used for transmission. The number of resource element REs of the DCI is different from the symbol number and subcarrier number corresponding to the RE.

In a possible implementation manner of the second aspect, the first reference signal and the second reference signal are demodulation reference signals DMRS.

According to a third aspect, a communication apparatus is provided, and the apparatus includes a unit for performing each step in the foregoing first aspect or any possible implementation manner of the first aspect.

According to a fourth aspect, a communication device is provided, and the device includes a unit for performing each step in the foregoing second aspect or any possible implementation manner of the second aspect.

According to a fifth aspect, a communication device is provided. The device includes at least one processor and a memory, where the at least one processor is configured to execute the foregoing first aspect or a method in any possible implementation manner of the first aspect.

According to a sixth aspect, a communication device is provided. The device includes at least one processor and a memory, where the at least one processor is configured to execute the foregoing second aspect or a method in any possible implementation manner of the second aspect.

According to a seventh aspect, a communication device is provided. The device includes at least one processor and an interface circuit, and the at least one processor is configured to execute the foregoing first aspect or a method in any possible implementation manner of the first aspect.

According to an eighth aspect, a communication device is provided. The device includes at least one processor and an interface circuit, and the at least one processor is configured to execute the foregoing second aspect or the method in any possible implementation manner of the second aspect.

In a ninth aspect, a terminal device is provided. The terminal device includes the communication device provided in the third aspect, or the terminal includes the communication device provided in the fifth aspect, or the terminal includes the communication device provided in the seventh aspect. Device.

According to a tenth aspect, a network device is provided. The network device includes the communication device provided in the fourth aspect, or the network device includes the communication device provided in the sixth aspect, or the network device includes the eighth aspect. Communication device.

According to an eleventh aspect, a communication system is provided, which includes the communication device of the third aspect and the communication device of the fourth aspect; or the system includes the terminal device of the ninth aspect and the network device of the tenth aspect.

According to a twelfth aspect, a computer program product is provided. The computer program product includes a computer program that, when executed by a processor, is used to execute the first aspect or a method in any possible implementation manner of the first aspect. Or the method in the second aspect or any possible implementation of the second aspect.

According to a thirteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program. When the computer program is executed, the computer program is used to execute the first aspect or any possible implementation manner of the first aspect Method, or the method in the second aspect or any possible implementation of the second aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a mobile communication system applicable to an embodiment of the present application.

FIG. 2 is a schematic diagram of repeatedly sending DCI on 4 timeslots in the prior art.

FIG. 3 is a schematic flowchart of an information transmission method according to an embodiment of the present application.

FIG. 4 is a schematic diagram of reference signal sharing according to an embodiment of the present application.

FIG. 4 is a schematic diagram of reference signal sharing according to another embodiment of the present application.

FIG. 6 is a schematic flowchart of an information transmission method according to another embodiment of the present application.

FIG. 7 is a schematic diagram of resources when a transmission unit is a REG according to an embodiment of the present application.

FIG. 8 is a schematic diagram of a communication device according to an embodiment of the present application.

FIG. 9 is a schematic diagram of another example communication device according to an embodiment of the present application.

FIG. 10 is a schematic diagram of a terminal device according to an embodiment of the present application.

FIG. 11 is a schematic diagram of a network device according to an embodiment of the present application.

detailed description

The technical solutions in this application will be described below with reference to the drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a global mobile communication (GSM) system, a code division multiple access (CDMA) system, and a broadband code division multiple access (wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS), Global Interoperability for Microwave Access (WiMAX) communication system, 5th generation in the future, 5G) system or new radio (NR).

FIG. 1 is a schematic structural diagram of a mobile communication system applicable to an embodiment of the present application. As shown in FIG. 1, the mobile communication system 100 may include a core network device 110, a radio access network device 120, and at least one terminal device (such as the terminal device 130 and the terminal device 140 shown in FIG. 1). The terminal device is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network device in a wireless or wired manner. The core network device and the wireless access network device can be separate and different physical devices, or the functions of the core network device and the wireless access network device's logical functions can be integrated on the same physical device, or they can be a physical device It integrates some functions of core network equipment and some functions of wireless access network equipment. The terminal equipment can be fixed or removable. FIG. 1 is only a schematic diagram, and the communication system may further include other network devices, such as a wireless relay device and a wireless backhaul device, which are not shown in FIG. 1. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

The terminal equipment in the mobile communication system 100 may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, Wireless communication equipment, user agent or user device. Terminal equipment can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and wireless communications Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or public land mobile network (PLMN) in future evolution Terminal equipment, etc. In this application, the aforementioned terminal equipment and chips applicable to the aforementioned terminal equipment are collectively referred to as terminal equipment. It should be understood that the embodiment of the present application does not limit the specific technology and specific device form used by the terminal device.

In the mobile communication system 100, the radio access network device 120 is an access device that the terminal device accesses to the mobile communication system by wireless. The wireless access network device 120 may be: a base station, an evolved base station (base station), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, and a wireless base station. A relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), etc., can also be a gNB in an NR system, or it can be a component or part of a base station. Equipment, such as a central unit (CU), a distributed unit (DU), or a baseband unit (BBU). It should be understood that, in the embodiments of the present application, specific technologies and specific device forms adopted by the radio access network device are not limited. In this application, the wireless access network device is referred to as a network device. Unless otherwise specified, in this application, the network device refers to a wireless access network device. In this application, the network device may refer to the network device itself, or a chip applied to the network device to perform a wireless communication processing function.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. This hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. This application layer contains applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the application The communication may be performed by using the method described above. For example, the method execution subject provided in the embodiments of the present application may be a terminal device or a network device, or a function module in the terminal device or the network device that can call a program and execute the program.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media used to store information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instruction (s) and / or data.

It should be understood that, in the communication system shown in FIG. 1 or other communication systems, the method provided in this application may be particularly applicable to transmission scenarios with flat channel characteristics in the communication system shown in FIG. 1 or other communication systems. For example, in a transmission scenario that satisfies LOS transmission characteristics, the embodiments of the present application are not limited herein.

In order to facilitate understanding of the embodiments of the present application, the following briefly introduces several concepts involved in the present application.

Time domain unit: The time domain resources used by the base station and terminal equipment for wireless communication can be divided into multiple time domain units. In addition, in the embodiment of the present application, multiple time domain units may be continuous, or a preset interval may be set between some adjacent time domain units, which is not specifically limited in the embodiment of the present application.

In the embodiment of the present application, the length of a time domain unit is not limited. For example, one time domain unit may be one or more subframes; or, it may be one or more time slots; or, it may be one or more symbols.

Time-domain symbols: Time-domain symbols, also called symbols, can be orthogonal frequency division (multiplexing) (OFDM) symbols, or single carrier frequency division multiple access (single carrier frequency division multiple access, SC-FDMA). ) Symbol, in which SC-FDMA is also known as orthogonal frequency division multiplexing (OFDM) with conversion precoding (transform precoding, OFDM with TP).

Resource element (RE): The smallest time-frequency resource unit in LTE. It occupies 1 subcarrier (for example, 15KHz) in the frequency domain and 1 OFDM symbol (for example, 1 / 14ms) in the time domain.

Sub-frame: A sub-frame occupies the time-frequency resources of the entire system bandwidth in the frequency domain, and is a time-frequency resource unit with a fixed time-domain length in the time domain, such as 1 ms.

Time slot: A time slot refers to a basic time domain resource unit composed of multiple time domain symbols, for example, occupying 7 or 14 consecutive symbols in the time domain.

Subcarrier width: the smallest granularity in the frequency domain. For example, in the LTE system, the subcarrier width of one subcarrier is 15kHz, and in the 5G system, the width of one subcarrier may be 15kHz, 30kHz, or 60kHz. The embodiments of the present application are not limited herein.

Physical resource block (PRB): P consecutive subcarriers occupied in the frequency domain, and resources occupied in the time domain are consecutive Q OFDM symbols. Where P and Q are natural numbers greater than 1. For example, a physical resource block may occupy 12 consecutive subcarriers in the frequency domain and 7 consecutive OFDM symbols in the time domain. For example, P = 12, Q = 14, and so on. The embodiments of the present application are not limited herein.

Resource element group (REG): P consecutive subcarriers occupied in the frequency domain, and resources occupied in the time domain are consecutive Q OFDM symbols. Where P is a natural number greater than 1. For example, a resource unit group may occupy 12 consecutive subcarriers in the frequency domain, and may occupy 1 OFDM symbol in the time domain. The embodiments of the present application are not limited herein.

Control channel element (CCE): Corresponds to multiple resource element groups. The number of resource element groups corresponding to one control channel element is fixed, for example, six. The physical resources transmitted by the PDCCH may be in units of CCEs, and the size of one CCE may be 9 REGs, that is, 1CCE = 9REG = 36RE. The embodiments of the present application are not limited herein.

In the existing communication system, in order to improve the coverage performance of the PDCCH, a repeated transmission method is adopted, thereby achieving diversity reception on the receiving side. The receiving side improves the PDCCH detection performance based on a certain combination mode.

The repeated transmission method mainly includes: the network side device (network device) notifies the terminal to detect the time-frequency resource of detecting the PDCCH and the configuration of the PDCCH through configuration information, that is, the process of repeatedly sending the same PDCCH and the terminal device repeatedly detecting the PDCCH. The configuration information may include time-frequency resource information for detecting the PDCCH. For example, the time-frequency resource for detecting the PDCCH may be multiple time-frequency unit sets, and each time-frequency unit set in the multiple time-frequency unit sets is used for transmission. Downlink control information (DCI) of the PDCCH. That is, the multiple time-frequency units are used to repeatedly transmit the DCI of the PDCCH. The time-frequency resource information may include a resource configuration of each time-frequency unit set. For example, time domain information, frequency domain information, space domain information, detection timing, etc. of each time-frequency unit. The resource configuration of each time-frequency unit set in the multiple time-frequency unit sets is different. The configuration information may further include a related configuration of the PDCCH that needs to be monitored. The configuration of the PDCCH to be detected is the same for each time-frequency unit set. For example, the corresponding control channel unit configuration and control channel resource unit group configuration to be detected in multiple time-frequency unit sets are the same. The control channel unit group configuration may include the number of control channel units and the number of resource units included in each control channel unit. The resource unit group configuration includes the number of resource units and the subcarrier number and symbol number information of the resource units.

After receiving the configuration information, the terminal device repeatedly monitors the PDCCH (detects the DCI transmitted on the PDCCH) at multiple detection occasions (monitoring occasions (MO)) determined according to the configuration information (time-frequency resources of the PDCCH). When a subsequent network device sends the PDCCH (sending DCI on the PDCCH), at each sending opportunity (such as a time-frequency unit), a reference signal (such as DMRS) corresponding to the DCI needs to be sent, and the terminal device receives After DMRS, the PDCCH channel estimation can be performed. The terminal device estimates the channel information for transmitting the DCI and performs coherent detection and demodulation according to the reference signal, that is, the terminal device needs to detect the channel information of the PDCCH according to the reference signal, and based on the channel estimation result and the information in the DCI to the network. The downlink data sent by the device is detected and decoded.

Take the example shown in FIG. 2 for description.

FIG. 2 is a schematic diagram of repeatedly sending the same PDCCH in 4 timeslots in the prior art. As shown in FIG. 2, four time slots located in the same frequency domain position are regarded as one control resource set (control resource set, CORESET). The network device sends DCI on each time slot. In addition, when sending the DCI, a reference signal corresponding to the time slot needs to be sent in each time slot, and the reference signal may be a demodulation reference signal (DMRS) or other reference signals. The terminal device demodulates the DCI related information on the time slot and determines the channel information of the PDCCH on the time slot according to the reference signal corresponding to each time slot. Send and receive subsequent data based on the determined channel information. For the four time slots included in CORESET1, each time slot has an RE for transmitting DCI and an RE for transmitting DMRS. It can be seen that DMRS needs to be transmitted in each time slot. For the four time slots included in CORESET2, DCI and DMRS need to be transmitted in each time slot. CORESET1 and CORESET2 are used to repeatedly transmit the same PDCCH.

For services such as URLLC that need to meet high reliability and low latency, traditional time domain repetition schemes have become the bottleneck of latency requirements. In addition, in the wireless communication scenarios of some aerial flying devices (such as drones, airplanes, balloons, and even satellites), the transmission environment between the flying device and the service node has almost no multipath transmission such as reflection and scattering, making the transmission channel Basically meet the characteristics of LOS transmission. In this case, the characteristics of the control channel are almost constant, but the reference signal (reference signal) of the control channel is included in each transmission unit of the control channel, so that the reference signal transmitted by the control channel occupies The large number of transmission resources causes redundancy in the signaling of the transmission channel and a waste of transmission resources. The resource utilization is low and the communication efficiency is low.

Based on the above problems, this application provides a method and device for information transmission, which can implement multiple transmission units that repeatedly transmit a PDCCH using a reference signal transmitted by one of the transmission units, greatly reducing the reference signal overhead used to estimate the control channel. It can save some transmission resources, realize more transmission resources for transmitting control information, improve the utilization ratio of transmission resources, and improve communication efficiency.

The following describes the information transmission method provided in the present application in detail with reference to FIG. 3. FIG. 3 is a schematic flowchart of an information transmission method 200 according to an embodiment of the present application. The method 200 can be applied to the scenario shown in FIG. It can also be applied in other communication scenarios, which are not limited in the embodiment of the present application.

It should be understood that, in the embodiment of the present application, a terminal device and a network device are taken as an execution subject of the execution method 200 as an example to describe the method 200. By way of example and not limitation, the execution body of the execution method 200 may also be a chip applied to a terminal device and a chip applied to a network device.

As shown in FIG. 3, the method 200 includes:

S210. The network device generates configuration information of a physical downlink control channel PDCCH. The configuration information includes time-frequency resource information of multiple transmission units on the PDCCH. The multiple transmission units include a first transmission unit and a second transmission unit. The transmission unit transmits the first downlink control information DCI and a first reference signal corresponding to the first transmission unit, the second transmission unit transmits a second DCI, and does not transmit a second reference signal corresponding to the second transmission unit.

S220. The network device sends the configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information.

S230. The terminal device receives the first reference signal on the first transmission unit according to the configuration information.

S240. The terminal device determines first channel information corresponding to the first transmission unit according to the first reference signal.

S250. The terminal device determines second channel information corresponding to the second transmission unit according to the first channel information.

In the method for transmitting information provided in this application, when multiple transmission units repeatedly transmit the same PDCCH, a transmission signal of a part of the transmission units (first transmission units) in the plurality of transmission units includes a signal transmitted with the part of the transmission units (first transmission units). ) Corresponding downlink reference signal (first reference signal), the transmission signal of the partial transmission unit (second transmission unit) does not include the downlink reference signal (second reference signal) corresponding to the partial transmission unit (second transmission unit), the terminal The device may determine the channel information corresponding to the first transmission unit according to the first transmission unit and the first reference signal corresponding to the first transmission unit, and determine to correspond to the second transmission unit according to the corresponding channel information in the first transmission unit. Channel information, so as to realize estimation and coherent demodulation of channel information for determining a PDCCH transmitted by the second transmission unit. Since the second transmission unit does not need to transmit the second reference signal, the overhead of the demodulation reference signal used to estimate the control channel can be reduced, which can save some transmission resources, realize more transmission resources for transmitting control information, and improve the utilization ratio of the transmission resources. , To further improve communication efficiency.

Specifically, in S210, when the network device needs to send data to the terminal device, channel estimation of the PDCCH and the like are needed. When the channel characteristics of the PDCCH are almost unchanged, multiple transmission units are used to repeatedly transmit the PDCCH, that is, multiple transmission units are used to transmit the DCI of the PDCCH. Therefore, when a network device generates configuration information of the PDCCH, the The configuration information includes time-frequency resource information of multiple transmission units on the PDCCH. A signal transmitted by a part of the plurality of transmission units (the first transmission unit) includes a first reference signal corresponding to the first transmission unit, and a signal transmitted by the part of the transmission units (the second transmission unit) does not include the signal transmitted by the second transmission unit. A second reference signal corresponding to the transmission unit. Optionally, the configuration information further includes reference signal configuration information, where the reference signal configuration information is used to indicate that a signal transmitted by a part of the multiple transmission units (the first transmission unit) includes a signal corresponding to the first transmission unit. The first reference signal and the signals transmitted by some transmission units (second transmission units) do not include the first and second reference signals from the second transmission unit. That is, the first transmission unit transmits the first downlink control information DCI and the first reference signal corresponding to the first transmission unit, and the second transmission unit transmits the second DCI, but does not transmit the second reference corresponding to the second transmission unit. Signal, each transmission unit in multiple transmission orders may be a resource unit occupying a certain time domain resource and frequency domain resource, for example, each transmission unit may occupy multiple symbols in the time domain and may occupy multiple symbols in the frequency domain. Subcarrier width.

It should be understood that the configuration information further includes a related configuration of the PDCCH. For example, the PDCCH time-frequency resource information corresponding to multiple transmission units, the PDCCH unit configuration corresponding to multiple transmission units, and the resource unit group configuration of the PDCCH corresponding to multiple transmission units. The configuration of each transmission unit corresponding to the PDCCH is the same. The PDCCH unit configuration may include the number of PDCCH units and the number of resource units included in each PDCCH unit. The configuration of the PDCCH resource unit group may include information such as the number of PDCCH resource units and the subcarrier number and symbol number of the resource unit.

It should also be understood that the DCI sent by the network device on the multiple transmission units may be different and may be the same. When the first transmission unit includes multiple transmission units, the DCI on each first transmission unit may be the same or different. The reference signals on each first transmission unit may be the same or different. The terminal device may determine channel information of a PDCCH corresponding to each first transmission unit according to a reference signal and DCI on each first transmission unit. The specific process is that since DCI is carried on the PDCCH for transmission, the terminal device determines the channel information for transmitting the DCI through the detected reference signal, that is, determines the channel information of the PDCCH corresponding to the transmission unit. After the channel information corresponding to the transmission unit is determined, subsequent data can be sent and received on the transmission unit.

In S220, the network device sends the configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information.

In S230, the terminal device determines position information (time-frequency position information) of multiple transmission units that repeatedly transmit the PDCCH according to the configuration information. The terminal device can detect DCI on the multiple transmission units. According to the configuration information, detection of the PDCCH is performed. In S240, since the signal transmitted by the first transmission unit includes the first reference signal and the first DCI, the terminal device can transmit the first DCI after receiving the first DCI and the first reference signal on the first transmission unit. The channel information of the DCI is estimated, that is, the channel information (first channel information) of the PDCCH corresponding to the first transmission unit is estimated. Through the first DCI and the first reference signal, the terminal device can determine the channel information of the PDCCH on the time domain segment corresponding to the first transmission unit, that is, the first channel information. The channel information here can be understood as channel state information (channel state information, CSI). Of course, the channel information may also include other parameters or information related to the channel quality.

In S250, after the terminal device receives the second DCI on the second transmission unit, since the signal transmitted by the second transmission unit does not include the second reference signal corresponding to the second transmission unit, the terminal device cannot determine the Channel information of the PDCCH corresponding to the second transmission unit, that is, second channel information. That is, the estimated channel information of the PDCCH corresponding to the second transmission unit cannot be obtained. Therefore, in S250, the terminal device may determine the second channel information corresponding to the second transmission unit according to the first channel information. That is, the terminal device can directly obtain the correspondence of the second transmission unit based on the channel information estimation (the first channel information) of the PDCCH corresponding to the first transmission unit without performing DCI demodulation and channel estimation in the second transmission unit. Channel information estimation (second channel information) of the PDCCH. The purpose of detecting the PDCCH is achieved. It provides better guarantee for data transmission and improves communication efficiency and quality.

In the information transmission method provided in this application, when multiple transmission units repeatedly transmit the same PDCCH, multiple transmission signals of the first transmission unit include a downlink reference signal (first reference signal) corresponding to the DCI of the PDCCH. The transmission signal of the second transmission unit does not include a downlink reference signal (second reference signal) corresponding to the DCI of the PDCCH, and the terminal device determines the second corresponding to the second transmission unit according to the first channel information corresponding to the first transmission unit. The channel information is used to implement estimation and coherent demodulation of channel information for determining a PDCCH transmitted by the second transmission unit. Since the second transmission unit does not need to transmit the second reference signal, the overhead of the demodulation reference signal used to estimate the control channel is reduced, and some transmission resources can be saved. The second transmission unit may have more resources for transmitting control information, etc., and realize more transmission resources for transmitting control information, which improves the utilization rate of transmission resources and further improves communication efficiency.

It should be understood that, in the embodiment of the present application, the terminal device may further determine the second reference signal in the second transmission unit according to the first reference signal in the first transmission unit. According to the second reference signal and the second DCI, an estimation value (second channel information) of channel information of the PDCCH corresponding to the second transmission unit is determined. That is, the terminal device can also perform processes such as DCI demodulation and channel estimation on the second time domain unit. Thereby, the estimation of the channel information of the PDCCH transmitted by the second transmission unit and the coherent demodulation are realized. The embodiments of the present application are not limited herein.

The following describes it with specific examples.

FIG. 4 is a schematic diagram of reference signal sharing according to an embodiment of the present application. As shown in FIG. 4, the terminal device repeatedly receives DCI of a certain PDCCH on 8 transmission units, respectively. The eight transmission units are numbered 1 to 8. The frequency domains of transmission units 1 to 4 are the same, and the frequency domains of transmission units 5 to 8 are the same. Transmission units 1 to 4 have the same time domain as transmission units 5 to 8. Transmission units 1 to 4 can be regarded as control resource set 1 (CORESET1), and transmission units 5 to 8 can be regarded as control resource set 2 (CORESET2). The DCI is included in the signal transmitted by each transmission unit. The DCIs transmitted by the eight transmission units may be the same or different. In the example shown in FIG. 4, the signals transmitted by transmission unit 1 and transmission unit 5 (first transmission unit) also include their respective reference signals, and the signals transmitted by other transmission orders (second transmission unit) do not include Reference signal. When the terminal equipment detects DCI on the eight transmission units, it can determine the first channel information corresponding to the transmission unit 1 according to the reference signal detected on the transmission unit 1. Then, according to the first channel information, channel information (second channel information) of the PDCCH corresponding to transmission units 2 to 4 is determined. Then, the channel information of the PDCCH corresponding to transmission units 1 to 4 can be determined. Alternatively, the terminal device may also determine the reference signals on the transmission units 2 to 4 respectively according to the first reference signal of the transmission unit 1, and then respectively according to the DCI and the determined reference signals on the transmission units 2 to 4 respectively. To determine channel information of the PDCCH corresponding to transmission units 2 to 4. Similarly, the channel information corresponding to transmission units 6 to 8 can be determined according to the channel information detected on transmission unit 5.

As another example, FIG. 5 is a schematic diagram of reference signal sharing according to another embodiment of the present application. As shown in FIG. 5, the terminal device receives DCI of a certain PDCCH on 8 transmission units, respectively. The eight transmission units are numbered 1 to 8. The frequency domains of transmission units 1 to 4 are the same, and the frequency domains of transmission units 5 to 8 are the same. Transmission units 1 to 4 have the same time domain as transmission units 5 to 8. Transmission units 1 to 4 can be regarded as control resource set 1 (CORESET1), and transmission units 5 to 8 can be regarded as control resource set 2 (CORESET2). The DCI is included in the signal transmitted by each transmission unit. In the example shown in FIG. 4, the signals transmitted by the transmission unit 1 (first transmission unit) also include corresponding reference signals, and the signals transmitted by other transmission units (second transmission unit) do not include corresponding reference signals. When determining the channel information of the PDCCH of the eight transmission units, the terminal equipment device can determine the channel information of the PDCCH corresponding to the transmission unit 1 according to the DCI and the reference signal on the transmission unit 1, and then corresponding to the transmission unit 1 The channel information of the PDCCH determines channel information of the PDCCH corresponding to the other 6 transmission units.

It should be understood that what is shown in FIG. 4 and FIG. 5 is merely exemplary and should not impose any limitation on the embodiments of the present application. For example, the transmission unit may be more transmission units, and the first transmission unit that transmits the reference signal may be another or more transmission units. This application is not limited here.

Optionally, as an embodiment, the configuration information further includes indication information, the indication information is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the second transmission unit not to transmit the second reference. signal.

Specifically, the configuration information may further include instruction information used to instruct the first transmission unit to transmit the first reference signal, and used to instruct the second transmission unit not to transmit the second reference signal. The network device also needs to use the indication information to notify the terminal device which signals transmitted by the transmission unit include DCI and a reference signal, and which signals transmitted by the transmission unit include only DCI. In order to facilitate correct decoding and demodulation of the terminal equipment. Even the network equipment and the terminal equipment have the same understanding of which transmission units transmit what signals. Therefore, the configuration information may further include indication information for instructing the first transmission unit to transmit the first reference signal, and for instructing the second transmission unit not to transmit the second reference signal. Avoid misunderstandings of signals transmitted by different transmission units by the terminal equipment, causing communication errors.

The indication information may be in a manner of displaying signaling. As an embodiment, the indication information may be indicated in a bit-map manner. For example, a transmission unit with a bit-map of 1 is a first transmission unit, and a transmission unit with a bit-map of 0 is a second transmission unit. Alternatively, a transmission unit with a bit-map of 0 is a first transmission unit, and a transmission unit with a bit-map of 1 is a second transmission unit.

It should be understood that the manner of displaying the indication may also be to use the number of each transmission unit to indicate whether the transmission unit is the first transmission unit or the second transmission unit, or may be other display indication modes, etc., which are not limited in this application. .

It should also be understood that in the embodiments of the present application, it is also possible to indicate which transmission units are the first transmission unit and which transmission units are the second transmission unit by using an implicit indication manner (such as a predefined manner). In this case, the configuration information does not include the instruction information. For example, the network device may negotiate in advance with the terminal device, and among the multiple transmission units, the transmission unit with the smallest value in the time domain position or the frequency domain position is the first transmission unit, and the other transmission units are the second transmission. unit. The value of the time domain position or the value of the frequency domain position may be a time-frequency number or a frequency-domain number. Wherein, the frequency domain positions or the time domain positions of the multiple transmission units are the same. For example, in the example shown in FIG. 4, for CORESET1, the value of the time domain position of transmission unit 1 is the smallest. Therefore, the transmission unit No. 1 can be determined as the first transmission unit in the CORESET1 set, and the transmission units No. 2 to 4 are the second transmission unit. As another example, in the example shown in FIG. 5, for CORESET1 and CORESET2, the values of the time domain position and the frequency domain position of the transmission unit 1 are the smallest. Therefore, the transmission unit No. 1 can be determined as the first transmission unit in the CORESET1 set, and the transmission units No. 2 to 8 are the second transmission unit. As another example, suppose that the transmission unit transmitting the DCI is transmission units 1 and 5, and the value of the frequency domain position of transmission unit 1 is the smallest. Therefore, transmission unit 1 is the first transmission unit, and transmission unit 5 is the second. Transmission unit.

The indication information may also be indication information whether the signals transmitted by the first transmission unit and the second transmission unit are shared by the reference signal. For example, the signal transmitted by the first transmission unit includes a first reference signal corresponding to the transmission of the first transmission unit, and the signal transmitted by the second transmission unit does not include the second reference signal corresponding to the transmission of the second transmission unit. Then, the indication information may be the first reference signal of the first transmission unit shared by the second transmission unit, or the channel information corresponding to the first transmission unit shared by the second transmission unit. “Shared” here can be understood as that the terminal device can determine the second reference signal or the second channel information corresponding to the second transmission unit according to the first reference signal or the first channel information of the first transmission unit.

Alternatively, the configuration information may not include indication information. Through a predefined method, ensure that the terminal device can negotiate with the network device before transmitting data: when the network device is in the signal sent by multiple transmission units (the signals transmitted by multiple transmission units include the same DCI), some transmission units The transmitted signals include reference signals, and some do not include reference signals. The terminal device determines, according to the predefined information and the configuration information of the transmission unit, that the reference signal or channel information of the transmission unit (first transmission unit) that needs to detect the reference signal needs to be shared in some transmission units (second transmission units). That is, the signal transmitted by the partial transmission unit (the first transmission unit) includes a reference signal, and the transmission method of the signal transmitted by the partial transmission unit (the second transmission unit) does not include the reference signal, which is itself an indication information. When the terminal device receives this form of information transmission on multiple transmission units, it determines that the reference signal needs to be shared. The embodiments of the present application are not limited herein.

It should also be understood that, in the embodiments of the present application, in addition to determining the transmission unit with the smallest value in the time domain position and / or the value in the frequency domain position as the first transmission unit, the first transmission unit may also be determined in other ways. The transmission unit and the second transmission unit may, for example, determine the value of the time domain position or the number of the frequency domain position as an odd number as the first transmission unit, and the value of the time domain position or the number of the frequency domain position as an even number. Determined as the second transmission unit and the like. The first transmission unit may have multiple transmission units, and the multiple transmission units may be continuous transmission units in the time or frequency domain, or may be discontinuous transmission units in the time or frequency domain. This application is not limited here.

Optionally, as an embodiment, as shown in FIG. 6, in S250, the terminal device determines the second channel information corresponding to the second transmission unit according to the first channel information, including:

S251. Determine the first channel information as the second channel information.

Specifically, when the terminal device detects the first reference signal on the first transmission unit and does not detect the second reference signal on the second transmission unit, it may first determine the first channel information corresponding to the first transmission unit, and then The first channel information is determined as the second channel information. That is, the first channel information is determined as the channel information corresponding to the two transmission units. Achieve sharing of channel information. It saves resources, facilitates implementation, and improves the efficiency of determining the channel information corresponding to the second transmission unit. Further improve communication efficiency.

It should be understood that the terminal device may also determine that the first reference signal detected on the first transmission unit is the second reference signal corresponding to the second transmission unit. That is, the first reference signal is determined as a second reference signal corresponding to the second transmission unit. That is, the DCI of the first transmission unit and the DCI of the second transmission unit share the first reference signal. Then, according to the first reference signal and the second DCI, the channel information estimation of the PDCCH corresponding to the second transmission unit is determined.

It should also be understood that, in the embodiment of the present application, in addition to using the foregoing first channel information to determine the second channel information, or the first reference signal to determine the second reference signal corresponding to the second transmission unit outer. The second channel information may also be determined according to the first channel information in other ways, or the second reference signal may be determined according to the first reference signal. For example, by transforming the value of the first channel information in a certain manner, the value of the first channel information may be calculated by using a function or a matrix to obtain the value of the second channel information. Alternatively, the second channel information may be obtained by calculating the first channel information in other commonly used manners. This application is not limited here.

Optionally, the first DCI and the second DCI are the same.

Specifically, the network device sends DCI in each transmission unit of the multiple transmission units. Therefore, the first DCI and the second DCI may be the same, that is, the DCI on the first transmission unit and the second transmission unit The DCI can be the same. In addition, when there are multiple first transmission units or second transmission units, the DCIs on the multiple first transmission units may be the same or different. The DCIs on multiple second transmission units may be the same or different. Of course, the first DCI and the second DCI may also be different. When there are multiple first transmission units, the downlink reference signals on the multiple first transmission units may be the same or different. This application is not limited here.

Optionally, as an embodiment, the frequency domain resources and / or time domain resources of the multiple transmission units are different, and the time domain resources of the multiple transmission units are any of time slots, subframes, and monitoring opportunities. The frequency domain resources of the multiple transmission units are physical resource blocks.

Specifically, the configuration information includes time-frequency position information of the multiple transmission units, that is, resource configuration information of each transmission unit in the multiple transmission units. The resource configuration information may include at least one of time domain information, frequency domain information, air domain information, and monitoring timing of each transmission unit.

The time domain information may refer to any one or more of the number of symbols and number information included in the transmission unit, the number of time slots and number information, the number of subframes and number information, and monitoring timing information. It is any one or more of time slots, subframes, and monitoring occasions.

The frequency domain information may be PRB information, for example, the number of PRBs and the like. The frequency domain information may also include the transmission unit including the number of subcarriers and numbering information, the number of resource blocks and numbering information, the number of subbands and numbering information, the number of bandwidth parts and numbering information, the number of carriers and numbering information One or more.

The airspace information may refer to the transmission unit including any one or more of the number of spatial multiplexing layers and numbering information, the number of beams and numbering information, and spatial quasi-coexistence information.

The monitoring timing includes the number of monitoring timings and number information of each PDCCH.

The resource configuration information of each transmission time domain unit in the multiple transmission units is different, that is, the time-frequency resources and / or frequency domain resources of each transmission unit are different. Multiple transmission units may have the same frequency domain resources and different time-frequency resources. Or, the frequency-domain resources are different, and the time-frequency resources are the same. Or, the frequency-domain resources are different, and the time-frequency resources are different.

Optionally, the time-frequency resources of the first transmission unit further include time-frequency resources of the first reference signal and resources of the DCI, and the time-frequency resources of the second transmission unit include time-frequency resources of the DCI. That is, the configuration information may further include position information of DCI transmitted by each transmission unit. It also includes position information of the first reference signal transmitted by the first transmission unit, and the position information may include at least one of time domain information, frequency domain information, air domain information, and monitoring timing. The terminal device may determine, on the basis of the configuration information, which resources detect the DCI and which resources detect the first reference signal, so as to prevent the terminal device from missing or erroneously detecting.

It should be understood that, in the example of the present application, the time domain resources and / or frequency domain resources of the multiple transmission units may include other time and frequency information for determining the multiple transmission units in addition to the above-mentioned time-frequency information and the like. Frequency resource information. The embodiments of the present application are not limited herein.

Optionally, as an embodiment, the first transmission unit and the second transmission unit include at least one resource unit group REG, and the resources included in the REG included in the first transmission unit and the second transmission unit are used to transmit the DCI resources. The number of unit REs is different from the symbol number and subcarrier number corresponding to the RE.

Specifically, as described above, the physical resources transmitted by the PDCCH may be in units of REGs. That is, the first transmission unit and the second transmission unit may include one or more REGs. For example, as shown in FIG. 5 or FIG. 6, each transmission unit may be one REG. Because the first transmission unit transmits DCI and the reference signal, and the second transmission unit transmits only DCI, the number and position of resource units RE used to transmit the DCI in the REG included in the first transmission unit and the second transmission unit are different. . Assume that one REG includes 32 REs. The size of each transmission unit is one REG. As shown in FIG. 7, FIG. 7 is a schematic diagram of resources when a transmission unit is a REG according to an embodiment of the present application. Because the first transmission unit transmits the DCI and the first reference signal, and the second transmission unit does not transmit the reference signal, only the DCI is transmitted. Therefore, in the first transmission time domain unit, the number of REGs that transmit DCI includes 26 REs, and the number of REGs that the second transmission unit transmits DCI includes 32 REs. In addition, the time domain position or the frequency domain position of the RE used to transmit the DCI in the REGs included in the first transmission unit and the second transmission unit are different. The time domain position of the RE may be a symbol number, and the frequency domain position may be a subcarrier number, etc., that is, the number of REs used to transmit the DCI and the corresponding symbol number of the RE in the REG included in the first transmission unit and the second transmission unit It is different from the subcarrier number. The embodiments of the present application are not limited herein.

Optionally, as an embodiment, the first transmission unit and the second transmission unit include at least one control channel unit CCE, and the resources of the CCE included in the first transmission unit and the second transmission unit are used to transmit the DCI resources. The number and location of the units RE are different.

Specifically, the physical resource transmitted by the PDCCH may also be in units of CCE. That is, the first transmission unit and the second transmission unit may include one or more CCEs. For example, each transmission unit may be one CCE. Because the first transmission unit transmits DCI and reference signals, and the second transmission unit transmits only DCI, the number and location of resource units RE used to transmit the DCI in the CCE included in the first transmission unit and the second transmission unit are different. . In addition, the time domain location or frequency domain location of the REs used to transmit DCI in the CCEs included in the first transmission unit and the second transmission unit are different. The time domain position of the RE may be a symbol number, and the frequency domain position may be a subcarrier number, etc. That is, the number of REs used to transmit the DCI in the CCE included in the first transmission unit and the second transmission unit and the symbol number corresponding to the RE It is different from the subcarrier number. The embodiments of the present application are not limited herein.

Optionally, the first reference signal and the second reference signal are demodulation reference signals DMRS.

It should be understood that, in the embodiment of the present application, the first reference signal and the second reference signal may also be other reference signals, for example, a cell-specific reference signal (C-RS), or a user-specific reference signal ( user equipment (UE-RS), positioning reference signals (P-RS), and CSI reference signals (CSI-RS). The embodiments of the present application are not limited herein.

It should be understood that, in various embodiments of the present application, the first, second, and the like are only used to indicate that multiple objects are different. For example, the first transmission unit and the second transmission unit are only used to indicate different transmission units. It should not have any impact on the transmission unit itself, and the above first, second, etc. should not cause any limitation to the embodiments of the present application.

It should also be understood that the foregoing is only to help those skilled in the art to better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Those skilled in the art may obviously make various equivalent modifications or changes according to the above examples given, for example, some steps in the above method 200 may be unnecessary, or some steps may be newly added. Or a combination of any two or more of the above embodiments. Such modified, changed, or combined solutions also fall within the scope of the embodiments of the present application.

It should also be understood that the foregoing description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments, and the same or similar points that are not mentioned can be referred to each other. For the sake of brevity, they will not be repeated here.

It should also be understood that the size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The information transmission method provided in the present application is described above with reference to FIGS. 3 to 7. The communication device provided in the embodiment of the present application will be described below.

FIG. 8 shows a schematic block diagram of a communication device 300 according to an embodiment of the present application. The device 300 may correspond to the terminal device described in the foregoing method 200, and may also be a chip or component applied to the terminal device. Each module or unit is configured to perform each action or processing performed by the terminal device in the foregoing method 200. As shown in FIG. 8, the communication device 300 may include a communication unit 310 and a processing unit 320.

The communication unit 310 receives configuration information of a physical downlink control channel PDCCH sent by a network device. The configuration information includes time-frequency resource information of multiple transmission units that transmit the PDCCH. The multiple transmission units include a first transmission unit and a second transmission unit. A transmission unit that transmits the first downlink control information DCI and a first reference signal corresponding to the first transmission unit, the second transmission unit transmits a second DCI and does not transmit a signal corresponding to the second transmission unit Second reference signal;

The processing unit 320 is configured to receive the first reference signal on the first transmission unit according to the configuration information;

Determining, according to the first reference signal, first channel information corresponding to the first transmission unit;

According to the first channel information, second channel information corresponding to the second transmission unit is determined.

In the device provided by the present application, when multiple transmission units repeatedly transmit the same PDCCH, the transmission signals of some transmission units (first transmission units) in the multiple transmission units include a downlink reference signal corresponding to the first transmission unit (No. A reference signal), and the transmission signal of some transmission units (second transmission unit) does not include the downlink reference signal (second reference signal) corresponding to the second transmission unit, and the device can transmit the first downlink according to the first transmission unit Control information DCI and a first reference signal corresponding to the first transmission unit, determining channel information corresponding to the first transmission unit, and determining channel information corresponding to the second transmission unit according to the corresponding channel information in the first transmission unit, Thereby, the estimation of the channel information of the PDCCH transmitted by the second transmission unit and the coherent demodulation are realized. Since the second transmission unit does not need to transmit the second reference signal, reducing the reference signal overhead used to estimate the control channel can save some transmission resources, realize more transmission resources for transmitting control information, improve the utilization ratio of transmission resources, and improve Communication efficiency.

Optionally, as an embodiment, the configuration information further includes indication information, the indication information is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the second transmission unit not to transmit the second reference. signal.

Optionally, as an embodiment, the indication information is a bitmap.

Optionally, as an embodiment, the processing unit 320 is specifically configured to determine the first channel information as the second channel information.

Optionally, as an embodiment, the first DCI and the second DCI are the same.

Optionally, as an embodiment, the frequency domain resources and / or time domain resources of the multiple transmission units are different, and the time domain resources of the multiple transmission units are any of time slots, subframes, and monitoring opportunities. The frequency domain resources of the multiple transmission units are physical resource blocks.

Optionally, as an embodiment, the first transmission unit and the second transmission unit include at least one resource unit group REG, and the resources included in the REG included in the first transmission unit and the second transmission unit are used to transmit the DCI resources. The number of unit REs is different from the symbol number and subcarrier number corresponding to the RE.

Optionally, as an embodiment, the first transmission unit and the second transmission unit include at least one control channel unit CCE, and the resources of the CCE included in the first transmission unit and the second transmission unit are used to transmit the DCI resources. The number of unit REs is different from the symbol number and subcarrier number corresponding to the RE.

Optionally, as an embodiment, the first reference signal and the second reference signal are demodulated reference signals DMRS.

It should be understood that, for the specific process of each unit in the device 300 performing the foregoing corresponding steps, please refer to the foregoing descriptions in conjunction with the methods of FIG. 3 to FIG. 7 and related descriptions in the various embodiments of the method 200.

FIG. 9 shows a schematic block diagram of a communication device 400 according to an embodiment of the present application. The device 400 may correspond to the network device described in the foregoing method 200, and may also be a chip or a component applied to the network device. Each module or unit is respectively configured to perform each action or process performed by the network device in the foregoing method 200. As shown in FIG. 13, the communication device 400 may include a communication unit 410 and a processing unit 420.

The processing unit 420 is configured to generate configuration information of a physical downlink control channel PDCCH. The configuration information includes time-frequency resource information of multiple transmission units that transmit the PDCCH. The multiple transmission units include a first transmission unit and a second transmission unit. The first transmission unit transmits the first downlink control information DCI and the first reference signal corresponding to the first transmission unit. The second transmission unit transmits the second DCI and does not transmit the second reference signal corresponding to the second transmission unit. ;

The communication unit 410 is configured to send the configuration information to a terminal device, where the configuration information is used by the terminal device to perform quality estimation of the PDCCH.

Optionally, as an embodiment, the configuration information further includes indication information, which is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the second transmission unit not to transmit the second reference signal. .

Optionally, as an embodiment, the indication information is a bitmap.

The first channel information corresponding to the first transmission unit is the same as the second channel information corresponding to the second transmission unit.

Optionally, as an embodiment, the first DCI and the second DCI are the same.

Optionally, as an embodiment, the frequency domain resources and / or time domain resources of the multiple transmission units are different, and the time domain resources of the multiple transmission units are any one of time slots, subframes, and monitoring opportunities. The frequency domain resources of the multiple transmission units are physical resource blocks.

Optionally, as an embodiment, the first transmission unit and the second transmission unit include at least one resource unit group REG, and the resource units in the REG included in the first transmission unit and the second transmission unit are used to transmit the DCI. The number of REs is different from the symbol numbers and subcarrier numbers corresponding to the REs.

Optionally, as an embodiment, the first transmission unit and the second transmission unit include at least one control channel unit CCE, and the CCE included in the first transmission unit and the second transmission unit is a resource unit for transmitting the DCI. The number of REs is different from the symbol numbers and subcarrier numbers corresponding to the REs.

Optionally, as an embodiment, the first reference signal and the second reference signal are demodulation reference signals DMRS.

It should be understood that, for specific processes of each unit in the device 400 performing the foregoing corresponding steps, please refer to the foregoing description in conjunction with the methods of FIG. 3 to FIG. 7 and related descriptions in the various embodiments of the method 200.

It should also be understood that the division of the units in the above device is only a division of logical functions. In actual implementation, it may be fully or partially integrated into a physical entity, or it may be physically separated. And the units in the device can all be implemented by software through the processing element call; they can also be implemented by hardware; some units can be implemented by software through the processing element call, and some units can be implemented by hardware. For example, each unit can be a separately established processing element, or it can be integrated and implemented in a certain chip of the device. In addition, it can also be stored in the form of a program in the memory and called and executed by a certain processing element of the device. Features. The processing element here can also be called a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or in a form called by software through a processing element.

In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more application specific integrated circuits (ASICs), or, one or Multiple digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. As another example, when a unit in the device can be implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or another processor that can call a program. As another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application. It may be the terminal device in the above embodiment, and is used to implement the operation of the terminal device in the above embodiment. As shown in FIG. 10, the terminal device includes an antenna 510, a radio frequency device 520, and a signal processing section 530. The antenna 510 is connected to the radio frequency device 520. In the downlink direction, the radio frequency device 520 receives the information sent by the network device through the antenna 510, and sends the information sent by the network device to the signal processing section 530 for processing. In the uplink direction, the signal processing section 530 processes the information of the terminal device and sends it to the radio frequency device 520. The radio frequency device 520 processes the information of the terminal device and sends it to the network device via the antenna 510.

The signal processing section 530 may include a modulation and demodulation subsystem to implement processing of each communication protocol layer of the data; it may also include a central processing subsystem to implement processing of the terminal operating system and the application layer; in addition, it may also include Other subsystems, such as multimedia subsystem, peripheral subsystem, etc. Among them, the multimedia subsystem is used to control the terminal device camera, screen display, etc., and the peripheral subsystem is used to achieve connection with other devices. The modem subsystem can be an independent chip. Optionally, the above device for a terminal may be located in the modem subsystem.

The modem subsystem may include one or more processing elements 531, for example, including a main control CPU and other integrated circuits. In addition, the modulation and demodulation subsystem may further include a storage element 532 and an interface circuit 533. The storage element 532 is used to store data and programs, but the program used to execute the method performed by the terminal device in the above method may not be stored in the storage element 532 but stored in a memory other than the modem subsystem. The interface circuit 533 is used to communicate with other subsystems. The above device for a terminal device may be located in a modulation and demodulation subsystem. The modulation and demodulation subsystem may be implemented by a chip. The chip includes at least one processing element and an interface circuit. The processing element is configured to execute any one of the above terminal devices. Each step of the method, the interface circuit is used to communicate with other devices. In one implementation, a unit of the terminal device that implements each step in the above method may be implemented in the form of a processing element scheduler. For example, a device for a terminal device includes a processing element and a storage element, and the processing element calls a program stored by the storage element to The method executed by the terminal in the foregoing method embodiments is performed. The storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.

In another implementation, the program for executing the method executed by the terminal device in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element. At this time, the processing element calls or loads the program from the off-chip storage element to the on-chip storage element to call and execute the method executed by the terminal in the foregoing method embodiments.

In another implementation, the unit that implements each step in the above method of the terminal device may be configured as one or more processing elements, which are disposed on the modulation and demodulation subsystem, and the processing elements herein may be integrated circuits. For example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The unit of the terminal device that implements each step in the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC), which is used to implement the above method.

FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present application. It is used to implement the operation of the network device in the above embodiments. As shown in FIG. 15, the network device includes an antenna 601, a radio frequency device 602, and a baseband device 603. The antenna 601 is connected to the radio frequency device 602. In the uplink direction, the radio frequency device 602 receives the information sent by the terminal through the antenna 601, and sends the information sent by the terminal device to the baseband device 603 for processing. In the downlink direction, the baseband device 603 processes the information of the terminal and sends it to the radio frequency device 602. The radio frequency device 602 processes the information of the terminal device and sends it to the terminal via the antenna 601.

The baseband device 603 may include one or more processing elements 6031, for example, including a main control CPU and other integrated circuits. In addition, the baseband device 603 may further include a storage element 6032 and an interface 6033. The storage element 6032 is used to store programs and data; the interface 6033 is used to exchange information with the radio frequency device 602, and the interface is, for example, a common public wireless interface , CPRI). The above device for a network device may be located in a baseband device 603. For example, the above device for a network device may be a chip on the baseband device 603. The chip includes at least one processing element and an interface circuit, and the processing element is used to execute the above network. The device executes each step of any method, and the interface circuit is used to communicate with other devices. In one implementation, the unit that the network device implements each step in the above method may be implemented in the form of a processing element scheduler. For example, an apparatus for a network device includes a processing element and a storage element, and the processing element calls a program stored by the storage element to The method performed by the network device in the foregoing method embodiment is performed. The storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.

In another implementation, the unit that the network device implements each step in the above method may be configured as one or more processing elements, which are disposed on the baseband device. The processing element here may be an integrated circuit, for example: an Or multiple ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

A unit that implements each step in the above method of a network device may be integrated together and implemented in the form of a system on a chip. For example, the baseband device includes the SOC chip to implement the above method.

The terminal device and the network device in the foregoing various device embodiments may completely correspond to the terminal device or the network device in the method embodiment, and corresponding modules or units execute corresponding steps. For example, when the device is implemented in a chip manner, The receiving unit may be an interface circuit used by the chip to receive signals from other chips or devices. The above sending unit is an interface circuit of the device for sending signals to other devices. For example, when the device is implemented as a chip, the sending unit is the chip for sending signals to other chips or devices. Interface circuit.

An embodiment of the present application further provides a communication system, where the communication system includes the foregoing terminal device and the foregoing network device.

An embodiment of the present application further provides a computer-readable medium for storing computer program code, where the computer program includes instructions for performing the information transmission method in the embodiment of the present application in the method 200 described above. The readable medium may be a read-only memory (ROM) or a random access memory (RAM), which is not limited in the embodiment of the present application.

The present application also provides a computer program product, the computer program product comprising instructions, when the instructions are executed, so that the terminal device and the network device perform operations of the terminal device and the network device corresponding to the above method.

An embodiment of the present application further provides a system chip. The system chip includes a processing unit and a communication unit. The processing unit may be, for example, a processor. The communication unit may be, for example, an input / output interface, a pin, or a circuit. The processing unit can execute computer instructions to cause a chip in the communication device to execute any one of the information transmission methods provided in the embodiments of the present application.

Optionally, the computer instructions are stored in a storage unit.

Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc. The storage unit may also be a storage unit outside the chip in the terminal, such as a read-only memory (ROM) ) Or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), etc. Wherein, the processor mentioned above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits executed by a program for controlling the above-mentioned information transmission method. The processing unit and the storage unit can be decoupled and respectively set on different physical devices, and the respective functions of the processing unit and the storage unit can be realized by wired or wireless connection, so as to support the system chip to implement the foregoing embodiments. Various functions in. Alternatively, the processing unit and the memory may be coupled on the same device.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be a ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), and an electrically erasable programmable read-only memory (EPROM) , EEPROM) or flash. The volatile memory may be RAM, which is used as an external cache. There are many different types of RAM, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate Synchronous dynamic random access memory (double SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM), and direct memory bus random access Fetch memory (direct RAMbus RAM, DR RAM).

The terms "system" and "network" are often used interchangeably herein. The term "and / or" in this document is only a kind of association relationship describing related objects, which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and exists alone B these three cases. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

The terms "uplink" and "downlink" appearing in this application are used to describe the direction of data / information transmission in specific scenarios. For example, the direction of "uplink" generally refers to the direction or distribution of data / information from the terminal to the network side. The direction of the transmission from the centralized unit to the centralized unit. The "downlink" direction generally refers to the direction in which data / information is transmitted from the network side to the terminal, or the direction in which the centralized unit transmits to the distributed unit. "" It is only used to describe the direction of data / information transmission, and the specific start and end devices of this data / information transmission are not limited.

Various objects such as various messages / information / devices / network elements / systems / devices / actions / operations / processes / concepts have been assigned names in this application. It is understandable that these specific names are not It constitutes a restriction on the related object, and the name given can be changed according to factors such as scene, context, or usage habits. The understanding of the technical meaning of the technical terms in this application should mainly be based on the functions they reflect / execute in the technical solution And technical effects to determine.

In the foregoing embodiments, all or part of the implementation may be implemented by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center through a cable (Such as coaxial cable, optical fiber, digital subscriber (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integrations. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic disk), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), or the like.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the system, device, and unit described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or compact discs and other media that can store program codes .

The above is only a specific implementation of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (26)

A method for transmitting information, comprising: Receiving configuration information of a physical downlink control channel PDCCH sent by a network device, the configuration information including time-frequency resource information of multiple transmission units transmitting the PDCCH, the multiple transmission units including a first transmission unit and a second transmission unit The first transmission unit transmits the first downlink control information DCI and the first reference signal corresponding to the first transmission unit, the second transmission unit transmits the second DCI, and does not transmit the second DCI A corresponding second reference signal; Receiving the first reference signal on the first transmission unit according to the configuration information; Determining, according to the first reference signal, first channel information corresponding to the first transmission unit; Determining, according to the first channel information, second channel information corresponding to the second transmission unit. The method according to claim 1, wherein the configuration information further comprises indication information, the indication information is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the first The two transmission units do not transmit the second reference signal. The method according to claim 2, wherein the indication information is a bitmap. The method according to any one of claims 1 to 3, wherein determining the second channel information corresponding to the second transmission unit based on the first channel information comprises: Determining the first channel information as the second channel information. The method according to any one of claims 1 to 4, wherein the first DCI and the second DCI are the same. The method according to any one of claims 1 to 5, wherein frequency domain resources and / or time domain resources of the multiple transmission units are different, and time domain resources of the multiple transmission units are Any one of a slot, a subframe, and a monitoring opportunity, and the frequency domain resources of the multiple transmission units are physical resource blocks. The method according to any one of claims 1 to 6, wherein the first transmission unit and the second transmission unit include at least one resource unit group REG, and the first transmission unit and the first transmission unit The number of resource units RE used to transmit the DCI in the REG included in the two transmission units is different from the symbol number and subcarrier number corresponding to the RE. The method according to any one of claims 1 to 7, wherein the first transmission unit and the second transmission unit include at least one control channel unit CCE, the first transmission unit and the first transmission unit The number of resource unit REs used to transmit the DCI in the CCE included in the two transmission units is different from the symbol numbers and subcarrier numbers corresponding to the REs. The method according to any one of claims 1 to 8, wherein the first reference signal and the second reference signal are demodulation reference signals DMRS. A method for transmitting information, comprising: Generating configuration information of a physical downlink control channel PDCCH, the configuration information including time-frequency resource information of multiple transmission units transmitting the PDCCH, the multiple transmission units including a first transmission unit and a second transmission unit, the first A transmission unit transmits a first downlink control information DCI and a first reference signal corresponding to the first transmission unit, the second transmission unit transmits a second DCI, and does not transmit a second DCI corresponding to the second transmission unit A reference signal, the first transmission unit and the second transmission unit transmit the same downlink control information DCI, the first transmission unit transmits a first reference signal corresponding to the DCI, and the second transmission unit does not transmit The first reference signal; Sending the configuration information to a terminal device, where the configuration information is used by the terminal device to perform quality estimation of the PDCCH. The method according to claim 10, wherein the configuration information further comprises indication information, the indication information is used to instruct the first transmission unit to transmit the first reference signal, and is used to instruct the first The two transmission units do not transmit the second reference signal. The method according to claim 10 or 11, wherein the indication information is a bitmap The method according to any one of claims 10 to 12, wherein the first channel information corresponding to the first transmission unit and the second channel information corresponding to the second transmission unit are the same. The method according to any one of claims 10 to 13, wherein the first DCI and the second DCI are the same. The method according to any one of claims 10 to 14, wherein frequency domain resources and / or time domain resources of the multiple transmission units are different, and time domain resources of the multiple transmission units are Any one of a slot, a subframe, and a monitoring opportunity, and the frequency domain resources of the multiple transmission units are physical resource blocks. The method according to any one of claims 10 to 15, wherein the first transmission unit and the second transmission unit include at least one resource unit group REG, and the first transmission unit and the first transmission unit The number of resource units RE used to transmit the DCI in the REG included in the two transmission units is different from the symbol number and subcarrier number corresponding to the RE. The method according to any one of claims 10 to 16, wherein the first transmission unit and the second transmission unit include at least one control channel unit CCE, the first transmission unit and the first transmission unit The number of resource unit REs used to transmit the DCI in the CCE included in the two transmission units is different from the symbol numbers and subcarrier numbers corresponding to the REs. The method according to any one of claims 10 to 17, wherein the first reference signal and the second reference signal are demodulation reference signals DMRS. A communication device, comprising units for performing each step of the method according to any one of claims 1 to 9. A communication device, comprising units for performing each step of the method according to any one of claims 10 to 18. A communication device, comprising at least one processor and an interface circuit, wherein the at least one processor is configured to execute the method according to any one of claims 1 to 9. A communication device, comprising at least one processor and an interface circuit, wherein the at least one processor is configured to execute the method according to any one of claims 10 to 18. A terminal device, comprising the communication device according to claim 19 or 21. A network device, comprising the communication device according to claim 20 or 22. A storage medium, comprising a program, and when the program is executed by a processor, the method according to any one of claims 1 to 18 is executed. A chip system is characterized in that the chip system includes: Memory for storing instructions; A processor, configured to call and execute the instructions from the memory, so that the communication device on which the chip system is installed executes the method according to any one of claims 1 to 18.

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