CN102801504B - The method and apparatus that the method that control channel maps, control channel detect - Google Patents

Abstract

The embodiment of the present invention relates to a control channel mapping method, a control channel detection method and a device. The control channel mapping method includes: for the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, at least two Determining a corresponding search space for control channels of the same signaling length, enabling the at least two control channels of the same signaling length to use the same search space, and mapping the at least two control channels of the same signaling length to the determined corresponding and/or, determine corresponding search spaces for at least two control channels of different signaling lengths, so that at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit, At least two control channels with different signaling lengths are respectively mapped to the determined corresponding search spaces. The embodiment of the present invention can not only reduce the collision of the control channel, but also reduce the times of blind detection of the control channel.

Description

Control channel mapping method, control channel detection method and device

technical field

The present invention relates to the field of communication technologies, in particular to a control channel mapping method, a control channel detection method and a device.

Background technique

In the 3GPP Evolved Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access, referred to as: E-UTRA) communication system, the transmission of the physical data channel of the user equipment (User Equipment, referred to as: UE) needs to be notified to the UE through the scheduling assignment command of the system. These scheduling assignment instructions are usually carried by a Physical Downlink Control Channel (PhysicalDownlinkControlChannel, PDCCH for short), where the scheduling assignment instructions are, for example, the downlink scheduling grant (DL_grant) and Corresponding to an uplink scheduling grant (UL_grant) of a physical uplink shared channel (Physical Uplink Share Channel, PUSCH for short).

In the LTE frequency division duplex (Frequency Division Duplex, referred to as: FDD) system, the UE and the network side can only transmit data through a pair of uplink and downlink component carriers. The PDCCH includes DL_grant and UL_grant. Indicates the component carrier's scheduling of downlink or uplink physical data channel resources corresponding to the UE. However, after the carrier aggregation technology is introduced into the LTE-Advanced system, the UE and the network side can transmit data on multiple component carriers or component carrier pairs at the same time, and the scheduling signaling of the data channel corresponding to each component carrier is independently coded In this way, resource scheduling signaling on each component carrier requires a PDCCH.

In the carrier aggregation system, a PDCCH corresponding to a UE may be transmitted on each component carrier, for scheduling the transmission of the UE's PDSCH on the component carrier or the PUSCH corresponding to the component carrier. It may also be that the PDCCH of the UE is transmitted on one or several component carriers. At this time, a PDCCH can not only indicate the transmission of the data channel on the downlink component carrier and the corresponding uplink component carrier, but also indicate that it is not on the same downlink component carrier or not on the corresponding uplink paired component carrier. channel transmission.

For a UE, when the PDCCHs corresponding to multiple component carriers are transmitted on one component carrier or a few component carriers, the probability of collision between control channels is very high due to the limited search space corresponding to the control channels. If the value is too large, some PDCCHs of the UE may not be scheduled, and some data of the UE may not be transmitted, reducing the throughput of the UE.

Contents of the invention

Embodiments of the present invention provide a control channel mapping method, a control channel detection method and a device, so that the probability of control channel collisions is reduced.

A method for controlling channel mapping provided by an embodiment of the present invention includes:

For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, determine the corresponding search space for at least two control channels of the same signaling length, so that the at least two control channels of the same signaling length use the same A search space, mapping the at least two control channels of the same signaling length to a determined corresponding search space; and/or

For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, corresponding search spaces are respectively determined for at least two control channels with different signaling lengths, so that in at least one time transmission unit, the at least two different signaling The control channels of different signaling lengths use different search spaces, and the at least two control channels of different signaling lengths are respectively mapped to corresponding determined search spaces.

A method for controlling channel detection provided by an embodiment of the present invention includes:

For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, determine the corresponding search space for at least two control channels of the same signaling length, so that the at least two control channels of the same signaling length use the same A search space, within the determined same search space, detects a control channel of a signaling length included in the same search space; and/or

For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, corresponding search spaces are respectively determined for at least two control channels with different signaling lengths, so that in at least one time transmission unit, the at least two different signaling Make the control channels of different lengths use different search spaces, and respectively detect the control channels of the signaling lengths included in the different search spaces in the determined different search spaces.

An embodiment of the present invention also provides a transmitting device, including:

The first processing module and/or the second processing module, wherein,

The first processing module includes: a first search space determination module, configured to determine corresponding search spaces for at least two control channels of the same signaling length according to the signaling length of the control channel corresponding to the component carrier for the same aggregation level , making the at least two control channels of the same signaling length use the same search space; and a first mapping module, configured to map the at least two control channels of the same signaling length to the first search space to determine The corresponding search space determined by the module;

The second processing module includes: a second search space determination module, configured to determine corresponding search spaces for at least two control channels with different signaling lengths according to the signaling length of the control channel corresponding to the component carrier for the same aggregation level. Space, so that the at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit; and a second mapping module, used to separate the at least two control channels of different signaling lengths Mapping to the corresponding search space determined by the second search space determining module.

An embodiment of the present invention also provides a receiving device, including:

The first processing module and/or the second processing module, wherein,

The first processing module includes: a first search space determination module, configured to determine corresponding search spaces for at least two control channels of the same signaling length according to the signaling length of the control channel corresponding to the component carrier for the same aggregation level , making the at least two control channels with the same signaling length use the same search space; and a first detection module, configured to detect the The same search space includes control channels of signaling length;

The second processing module includes: a second search space determination module, configured to determine corresponding search spaces for at least two control channels with different signaling lengths according to the signaling length of the control channel corresponding to the component carrier for the same aggregation level. Space, so that the at least two control channels with different signaling lengths use different search spaces in at least one time transmission unit; and a second detection module, used to determine in the second search space determination module In different search spaces, respectively detect the control channels of the signaling lengths included in the different search spaces.

From the description of the above technical solutions, it can be known that each embodiment of the present invention configures the search space flexibly, so that for the same aggregation level, at least two control channels with different signaling lengths respectively determine their corresponding search spaces, so that the determined search space It is different in at least one time transmission unit, so that the search spaces corresponding to the at least two control channels of different signaling lengths are different, and the probability of collision of the control channels corresponding to the at least two control channels of different signaling lengths is reduced, It ensures that the control channel of the UE user equipment can be effectively scheduled and transmitted, thereby ensuring the smooth transmission of data of each UE user equipment, and improving the throughput of the user equipment; preferably, on the other hand, through the embodiments of the present invention, the At least two control channels of the same signaling length use the same search space, increasing the transmission flexibility of the control channels of the same signaling length corresponding to different component carriers, and reducing the collision probability of the at least two control channels of the same signaling length.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a method for controlling channel mapping provided by Embodiment 1 of the present invention;

FIG. 2a is a schematic diagram of a control channel mapping method provided in Embodiment 2 of the present invention;

FIG. 2b is another schematic diagram of the control channel mapping method provided in Embodiment 2 of the present invention;

FIG. 3 is another schematic diagram of the control channel mapping method provided in Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a control channel search space determination method in the control channel mapping method provided by Embodiment 2 of the present invention;

FIG. 5 is a flowchart of a method for controlling channel detection provided by Embodiment 3 of the present invention;

FIG. 6 is a schematic structural diagram of a transmitting device provided in Embodiment 4 of the present invention;

FIG. 7 is a schematic structural diagram of a receiving device provided by Embodiment 5 of the present invention.

detailed description

In order to make the purpose, technical solution, and advantages of the present invention clearer, the technical solution provided by the present invention will be further described in detail below with reference to the accompanying drawings and examples. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The 3GPPE-UTRA system is also called a Long Term Evolution (Long Term Evolution, LTE for short) system. In the LTE system, various variable bandwidths from 1.4M (6RB) to 20M (100RB) are supported, where RB is a resource block (ResourceBlock; RB for short). For any system bandwidth, in each time transmission unit such as a subframe, the physical layer PDCCH occupies certain resources in both the time domain and the frequency domain, and the time-frequency resources allocated to the PDCCH by the system are also changeable. Specifically, the PDCCH occupies all available subcarrier resources in the frequency domain. However, in the time domain, the system uses the control format indicator (control format indicator, CFI for short) value in the physical layer control format indicator channel (Physical control format indicator channel, PCFICH for short) to flexibly configure the time domain resources occupied by the PDCCH, that is, adopts orthogonal frequency division multiplexing Using the number of (Orthogonal Frequency Division Multiplexing, referred to as: OFDM) symbols, 2 bits are used in the system to represent the number of three different OFDM symbols, for example: when the system bandwidth is greater than 10RB, there are three types of OFDM symbols: 1, 2, and 3. case, or the three cases of 2, 3, and 4 OFDM symbols when the system bandwidth is less than or equal to 10 RB. The time-frequency resources allocated to the PDCCH (subcarrier resources, the number of OFDM symbols) are divided into multiple control channel elements (ControlChannelElement, referred to as: CCE), and the CCE is the smallest unit that constitutes the PDCCH time-frequency resources. One PDCCH occupies There are 4 aggregation levels for time-frequency resources, corresponding to occupying 1, 2, 4 and 8 CCEs respectively. According to the channel quality status of the user equipment and the system, select the appropriate aggregation level (corresponding to different coding rates) to transmit the user PDCCH of the device.

In the LTE system, the physical layer PDCCH of all user equipment is shared in each time transmission unit, and the user equipment uses its own specific scrambling code to perform blind detection on the possibility of any transmission format of the PDCCH in a predetermined search space. Detect various possible control channel information lengths, aggregation levels and positions of occupied time-frequency resource CCEs, etc. In order to reduce the times of blind detection performed by the user equipment in the control channel area, the transmission mode adopted by the user equipment in a period of time is defined, and the search space is planned. A transmission mode that the user equipment may adopt for a period of time is semi-statically notified to the user equipment through proprietary signaling. There are 7 modes of downlink transmission in the LTE system, and each transmission mode needs to detect two PDCCH formats. The user equipment The specific PDCCH format is determined through blind detection in the search space. The search space is a logical time-frequency resource defined according to the CCE, and the user equipment receives the control channel in this space and performs blind detection. The search space is divided into a common search space and a user equipment-specific search space, where the common search space refers to the search space that all user equipment that are in the connected state and need to detect the PDCCH need to perform blind detection; the user equipment-specific search space refers to Only this user equipment needs to perform PDCCH blind detection in this specific search space. In the specific search space of the user equipment, a certain number of CCEs form a search space, among which the search spaces corresponding to the 4 aggregation levels are stipulated in the agreement, and the space corresponding to the 4 aggregation levels of 1, 2, 4 and 8 CCEs Sizes are 6, 6, 2 and 2. Unless a common search space is specifically mentioned, the embodiments of the present invention mainly focus on the mapping and detection methods of the control channel in the user equipment-specific search space.

When the system schedules a user equipment to transmit or receive data, the PDCCH to be used for scheduling indication can be mapped and transmitted on a specific search space of the user equipment or a certain CCE aggregation level in a common search space. At the same time, the user equipment needs to perform reception and blind detection in a specific search space for possible PDCCH mapping and transmission or a common search space. If the user equipment passes the cyclic redundancy check (Cyclical Redundancy Check, CRC for short) ) check, indicating that the detected PDCCH is sent to the user equipment by the system. The user equipment parses the PDCCH according to the signaling format defined in the specification, and determines the time-frequency resource position where the user equipment needs to receive or transmit the data channel. Then, the user equipment completes data reception and transmission, realizing the communication between the user equipment and the system.

In the further evolution of the LTE system and the enhanced system Long Term Evolution-Advanced (LTE-Advanced for short) system, the carrier aggregation (CarrierAggregation) technology is used to support wider bandwidth to meet the requirements of the International Telecommunication Union for the fourth generation communication technology's peak data rate requirements. In carrier aggregation, spectrums of two or more component carriers (Component Carriers) are aggregated together to obtain an LTE-Advanced system with wider transmission bandwidth. Each component carrier may be configured to be compatible with the LTE system, and the frequency spectrum of each component carrier may be adjacent continuous frequency spectrum, non-adjacent frequency spectrum in the same frequency band or even discontinuous frequency spectrum in different frequency bands. LTE user equipment can only access one pair of compatible component carriers for data transmission and reception, while LTE-Advanced user equipment can simultaneously access multiple component carriers for data transmission and reception according to capabilities and service requirements. The carrier aggregation technology is also called spectrum aggregation (SpectrumAggregation) technology, or bandwidth extension (BandwidthExtension) technology.

In the LTE-Advanced system, two or more component carriers can be scheduled to a user equipment at the same time for simultaneous transmission of uplink or downlink services of the user equipment. In the carrier aggregation technology, each component carrier has an independent hybrid automatic repeat request (Hybrid-ARQ, HARQ for short) process, and the system can configure the same or different number of component carriers for LTE-Advanced user equipment for transmission data channel or control channel. The PDCCH of the user equipment can be transmitted on each component carrier for scheduling the downlink traffic channel PDSCH of the component carrier or the uplink traffic channel PUSCH corresponding to the component carrier. At this time, the control channel PDCCH and its scheduled data channel It can be on the same component carrier or on corresponding uplink and downlink component carriers; in addition, all PDCCHs of the user equipment can also be transmitted on one or several component carriers to schedule the user equipment in all The PDSCH or PUSCH transmitted on the scheduled uplink or downlink component carrier. At this time, the control channel and its scheduled data channel may not be in the same component carrier, or the corresponding uplink and downlink component carrier. A channel is separated from its scheduled data channel.

In the heterogeneous network system, the carrier interference coordination mechanism is applied between the component carriers of different systems, or to enhance the transmission performance of the control channel, select the carrier with less interference as the carrier of the control channel, or coordinate the control signaling of different systems Coverage issues, avoiding the frequent handover process of user equipment between multiple component carriers in the same cell. For example, in a home service system (HomeNodeB), since there are fewer user equipments supported, the control channel requirements are less, and even one symbol control channel resource in one component carrier can meet the requirements. Other component carriers can be used exclusively for data transmission to increase the data rate, and can also coordinate with the macro cell to select a component carrier with less interference to carry the control channel. In a coordinated multipoint transmission/reception (CoordinatedMultipointTransmission/Reception; CoMP for short) system, two or more cells or access points transmit data to the same user equipment on different component carriers, but the control channel It can be transmitted only on some component carriers of the serving cell. When the uplink service of LTE-Advanced user equipment is greater than the demand for downlink service, the number of downlink component carriers configured for this user equipment may be smaller than the number of uplink component carriers, and there must be a downlink component carrier that transmits multiple PDCCHs corresponding to multiple PDCCH scheduling. An uplink PUSCH channel can prevent the user equipment from receiving data on unnecessary downlink component carriers. When the aggregated component carriers have different bandwidths, especially when the bandwidth of some component carriers is small, at some point, the PDCCH used to schedule data on this component carrier is limited, and there are still remaining data channel resources, you can schedule this small bandwidth carrier The PDCCH for data transmission is transmitted on other carriers.

The following embodiments of the present invention are described by taking the LTE-Advanced system as an example, but are not limited to the LTE-Advanced system, and can also be applied to other systems, such as Wideband Code Division Multiple Access (WCDMA for short) systems, Or LTE system etc.

As shown in FIG. 1, it is a schematic flowchart of a method for controlling channel mapping provided in Embodiment 1 of the present invention, and the method includes the following steps:

Step 11. For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, determine the corresponding search space for at least two control channels with the same signaling length, so that the at least two control channels with the same signaling length use the same search space.

Step 12. Map the at least two control channels with the same signaling length to the determined corresponding search space.

The transmitting device maps the control channel to the search space determined according to the signaling length, where the transmitting device is, for example, a network device such as a base station on the network side.

In this embodiment, after step 12, a step of transmitting the control channel mapped into the search space may also be included.

Wherein, making at least two control channels of the same signaling length use the same search space specifically includes: making at least two control channels of the same signaling length corresponding to different component carriers use the same search space; or making the same component carrier correspond to At least two control channels of the same signaling length use the same search space.

The above step 11 and step 12 are methods in the case where there are at least two control channels of the same signaling length in one or more component carriers, when there are at least two control channels of different signaling lengths in one or more component carriers , step 11 and step 12 can also be the following steps or be executed together with the following steps:

For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, corresponding search spaces are respectively determined for at least two control channels with different signaling lengths, so that in at least one time transmission unit, the at least two different signaling Let the length of the control channel use different search spaces;

The at least two control channels with different signaling lengths are respectively mapped to the determined corresponding search spaces.

The corresponding search spaces are respectively determined for at least two control channels with different signaling lengths, so that the at least two control channels with different signaling lengths use different search spaces in at least one time transmission unit, specifically including: For at least two control channels of different signaling lengths corresponding to the component carrier, respectively determine corresponding search spaces, so that the at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit; or For at least two control channels of different signaling lengths corresponding to the same component carrier, corresponding search spaces are respectively determined, so that the at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit.

In practical application, before sending and receiving ends send control channels to each other, it is necessary to clarify the mapping rules of the search spaces corresponding to the control channels corresponding to component carriers, including: it is necessary to specify which carriers correspond to which control channels of the same signaling length use the same search space, and/or specify which carriers correspond to which control channels of different signaling lengths to determine the search spaces respectively. In addition, before specifying the mapping rule of the search space corresponding to the control channel corresponding to the component carrier, in order to realize the transmission and detection of the control channel at both ends of the transceiver, it may also need to include the initial or default mapping rule, a certain one corresponding to the component carrier Or the search space position and size corresponding to some control channels. The method of determining the mapping rule of the search space corresponding to the control channel corresponding to the component carrier can be determined by the standard protocol. The dedicated signaling can include high-layer semi-static signaling, physical layer dynamic signaling, and media access layer control channels.

When the corresponding search spaces are determined for at least two control channels with different signaling lengths, the search spaces corresponding to the two corresponding control channels with different signaling lengths are determined separately, that is, independent, and there may be no dependencies and rules . The search spaces corresponding to two control channels with different signaling lengths can be determined according to the different signaling length identifiers corresponding to the two different signaling lengths, or respectively according to the component carrier identifiers corresponding to the two control channels with different signaling lengths Determined, or determined based on any one or more of the above-mentioned related quantities combined, the present invention does not limit the selection of specific identification parameters. For example: component carrier A corresponds to three signaling lengths a, b, and c, component carrier B corresponds to four signaling lengths a, b, d, and e, and the control channel with signaling length a can use the same search Space, and respectively determine the search space corresponding to the control channel of signaling length c and signaling length d, the determination of the search space corresponding to the control channel of these two types including signaling length c and signaling length d is independent, for example, Determine according to different signaling length identifiers corresponding to the signaling length c and signaling length d, or respectively according to the carrier identifier corresponding to the component carrier A where the signaling length c is located and the corresponding component carrier B corresponding to the signaling length d Carrier identification is determined, or determined by combining the above two correlation quantities. The present invention does not limit the selection of specific identification parameters. As a result, the search spaces corresponding to two control channels with different signaling lengths may be the same or different. It is determined by the randomization of the parameters of the search space acting on the search space determination method, or determined by other independent determination methods. In addition, the present invention may not limit the search space corresponding to other signaling lengths b corresponding to component carrier A and control channels corresponding to other signaling lengths b and e of component carrier B.

Preferably, if the control channels with the same signaling length use the same search space, the user equipment can determine whether it corresponds to a certain control channel of all the control channels with the same signaling length by performing a blind detection in the search space , thereby reducing the number of blind detections and reducing the detection complexity. In addition, the size of the search space, including the number of CCEs, can be set flexibly. When the control channel collision probability is satisfied, the search space can be reduced as much as possible, which can further reduce the number of blind detections. For example: CC A corresponds to three signaling lengths a, b, and c; CC B corresponds to four signaling length formats a, b, d, and e; CC corresponds to two signaling lengths a, f , then use the same search space for the control channel with the signaling length a corresponding to CC A, the signaling length a corresponding to CC B, and the signaling length a corresponding to CC C, and the signaling length a corresponding to CC A The control channel of length b and the signaling length b corresponding to component carrier B also use the same search space.

Preferably, the control channels of different signaling lengths are respectively determined to have their own search spaces, so that the search spaces corresponding to the control channels of different signaling lengths may be different, thereby reducing the probability of control channels of different signaling lengths and ensuring that the UE The control channel of the user equipment can be effectively scheduled and transmitted, thereby ensuring the smooth transmission of data of each UE user equipment and improving the throughput of the user equipment. Compared with control channels of different signaling lengths having the same search space, the method of independently determining the search space corresponding to each signaling length control channel can make each signaling length control channel have its own corresponding Search spaces, when these search spaces do not overlap and have the same size as the comparison scheme, reduce the collision probability of the control channel without increasing the number of blind detections, because only the search corresponding to the control channel of each signaling length is required It is enough to detect the control channel of the corresponding signaling length in the space. For example: component carrier A corresponds to two signaling lengths a and c, component carrier B corresponds to two signaling length formats a and b, and component carrier C corresponds to a signaling length d, then determine the corresponding The signaling length c of c, the signaling length b corresponding to component carrier B, and the search space corresponding to the control channel of signaling length d corresponding to component carrier C.

Preferably, the method for determining the search space corresponding to the control channel may further include: a control channel of the same signaling length corresponding to a component carrier uses the same search space, or respectively determining the corresponding control channels of different signaling lengths corresponding to a component carrier search space. Wherein, when the control channels of the same signaling length corresponding to one component carrier use the same search space, the user equipment can determine whether it corresponds to all the control channels of the same signaling length by performing a blind detection in the same search space. A certain control channel of the channel, thereby reducing the number of blind detections and reducing the detection complexity. In addition, compared with the same search space for control channels of different signaling lengths corresponding to a component carrier in this embodiment of the present invention, the method for independently determining the search space corresponding to each signaling length control channel can make each signal Let the length have its own corresponding search space. When these search spaces do not overlap and the size is the same as that of the comparison scheme, the collision probability of the control channel can be reduced, and the number of blind detections will not be increased at the same time, because only in the determined search space It only needs to detect the control channel of the corresponding signaling length. For example: component carrier A corresponds to two signaling lengths a and b, then independently determine the search spaces corresponding to the control channels of the signaling lengths a and b corresponding to component carrier A, and the determined results can be the same or can be The difference is determined by the randomization of the parameters of the search space acting on the search space determination method.

In specific implementation, for a control channel corresponding to a component carrier with the same signaling length, for example: format 0 and format 1A have the same signaling length, each of these two formats can include 1 bit of information to clearly indicate Specifically, the control channel is format 0 or format 1A. If the control channels with the same signaling length come from different component carriers, the carrier indication information in the control channel can be multiplexed to distinguish which carrier is specifically indicated, so that the detected control channel can correspond to its scheduled component carrier. The indication information may be expressed in explicit bits, or may be distinguished by scrambling codes, and the specific method is not limited in the present invention. The method of adding bit indication can still be used to distinguish the specific format of the control channel of the same signaling length corresponding to a component carrier.

Further, the method of determining corresponding search spaces for at least two control channels of the same signaling length or determining corresponding search spaces for at least two control channels of different signaling lengths may include the following examples:

Example 1: Determine the initial position and size of the search space corresponding to the control channel.

Specifically, according to the signaling length identifier or the signaling length group identifier, determine the start position of the search space corresponding to the control channel; or according to the signaling length identifier or the signaling length group identifier, as well as the user equipment identifier and the control channel format Any one or more of identification, space division, component carrier identification corresponding to the control channel, subframe sequence number or aggregation level, to determine the starting position of the search space corresponding to the control channel. In the embodiment of the present invention, determining the size of the search space may include: determining the size of the search space corresponding to the control channel of the signaling length according to the signaling notification method, which may be changed according to the dynamic notification of the signaling; or according to a certain signal The number of control channels of the signaling length determines the size of the search space corresponding to the control channel of the signaling length, which may be determined by a standard protocol, for example, confirming the size of the search space according to the number of control channels of the current signaling length; or Determine the size of the search space corresponding to the control channel of the signaling length according to a determined algorithm; or determine the control channel of the signaling length at the same aggregation level according to the size of the search space corresponding to each aggregation level in the existing LTE system The size of the corresponding search space. When a search space is distributed on a component carrier, the starting position of the search space may be the starting sequence number of the CCEs included in the search space, and the size of the search space may be the number of CCEs included in the search space. When the CCEs included in the search space are continuous, the search space can be directly determined according to the starting position and size. When the CCEs included in the search space are discontinuous, the search space needs to be determined according to discontinuity rules in addition to the starting position and size. The discontinuity rule may be, for example, that the CCE serial number is an odd number, an even number, a difference of n, or other regular discontinuous forms. When a search space is distributed on multiple component carriers, determine the starting position and size of the search space on each component carrier, that is, the starting sequence number of the corresponding CCE and the number of CCEs on each component carrier , and then these CCEs are superimposed to obtain the complete search space distributed on multiple component carriers.

Example 2: According to the initial search space corresponding to the control channel of the signaling length, the search space corresponding to the control channel of the signaling length is determined.

In Example 2, it is first necessary to determine the initial search space corresponding to the control channel of the signaling length. In one case, the initial search space corresponding to the control channel of the signaling length can also be obtained through the following steps:

An initial search space corresponding to each component carrier is determined, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier is the initial search space of the same component carrier.

At this time, the initial position of the initial search space corresponding to each component carrier may be determined according to any one or more of the user equipment identifier, space division, component carrier identifier, subframe sequence number, or aggregation level. In this embodiment of the present invention, determining the size of the initial search space may include: determining the size of the initial search space corresponding to the component carrier according to the signaling notification method, which may be changed according to the dynamic notification of the signaling; or according to the corresponding component carrier The number of control channels determines the size of the initial search space corresponding to the component carrier, which may be determined by a standard protocol, for example, the size of the initial search space is determined according to the number of control channels corresponding to the current component carrier; or according to a determined algorithm Determine the size of the initial search space corresponding to the component carrier; or determine the size of the initial search space corresponding to the control channel of the signaling length at the same aggregation level according to the size of the search space corresponding to each aggregation level in the existing LTE system . For example: configuring according to the number of control channels corresponding to the component carrier and/or aggregation level and other parameters, or determining the initial search space corresponding to the component carrier according to an algorithm specified in a standard protocol. Typically, for each aggregation level, the initial search space corresponding to the control channel of the signaling length corresponding to each component carrier is the same as the search space of the existing LTE system. Of course, compared with the search space in the LTE system, it is also possible to make the initial search space of a specific component carrier, such as the control channel of the signaling length corresponding to the main carrier, larger, while the initial search space corresponding to other non-main carriers is smaller than that of LTE The search space of the system; even other possible configurations, which can be flexibly configured according to the needs of the system. The present invention is not limited.

In another case, the initial search space corresponding to the control channel of the signaling length can be obtained through the following steps:

Step 1. Determine the initial search space corresponding to each signaling length control channel corresponding to each component carrier;

Step 2. If there are at least two identical signaling lengths among the signaling lengths corresponding to the same component carrier, make the at least two control channels of the same signaling length use the same initial search space; and/or, If there are at least two different signaling lengths among the signaling lengths corresponding to the same component carrier, the control channels of the at least two different signaling lengths in at least one time transmission unit use different initial search spaces.

At this time, according to the signaling length identifier or signaling length group identifier, the initial search space start position corresponding to each signaling length control channel corresponding to each component carrier can be determined; or, according to the signaling length identifier or signaling length Any one or more of the length group identifier, user equipment identifier, control channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number, or aggregation level can determine each signaling component corresponding to each component carrier. The length of the control channel corresponds to the initial search space start position. In the embodiment of the present invention, determining the size of the initial search space may include: determining the size of the initial search space corresponding to the control channel of the signaling length according to the signaling notification method, which may be changed according to the dynamic notification of the signaling; or according to The number of control channels of a certain signaling length determines the size of the initial search space corresponding to the control channel of the signaling length, which can be determined by a standard protocol. For example, the initial search space is determined according to the number of control channels of the current signaling length. Size, etc.; or determine the size of the initial search space corresponding to the control channel of the signaling length according to a determined algorithm; or determine the control channel of the signaling length according to the size of the search space corresponding to each aggregation level in the existing LTE system The size of the corresponding initial search space at the same aggregation level.

In another case, further, if the user equipment schedules more component carriers, or because it supports Single User Multiple-Input Multiple-Output (SU-MIMO), multi-antenna transmission, continuous and discontinuous Resource allocation, etc., the user equipment may support control channels of various signaling lengths in each subframe. At this time, when determining the search space corresponding to the control channel according to the signaling length of the control channel corresponding to the component carrier, the component carriers may also be grouped, and after the component carriers are grouped, the control of the signaling length The initial search space corresponding to the channel can also be obtained through the following steps:

An initial search space corresponding to each component carrier group is determined, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier group is the initial search space of the same component carrier group.

At this point, the initial position of the initial search space corresponding to each component carrier group may be determined according to any one or more of the user equipment identifier, space division, component carrier group identifier, subframe sequence number, or aggregation level.

The method for grouping the component carriers may include: dividing each pair of uplink and downlink component carriers into a group; or dividing component carriers with the same transmission mode into a group; or grouping component carriers with the same transmission bandwidth Carriers are divided into one group; or component carriers with the same number of transmission antennas are divided into one group; any combination of the above methods can also be used. The present invention does not limit the method of specific grouping.

In Example 2, after determining the initial search space corresponding to the control channel of the signaling length, the specific method for determining the search space corresponding to the control channel of the signaling length according to the initial search space includes:

If the signaling length of the control channel corresponding to one component carrier is different from the signaling length of the control channel corresponding to one or more other component carriers, the search space corresponding to the control channel of the one signaling length and the one signaling length The initial search spaces corresponding to the control channels of different lengths are completely or partially the same. Wherein, the search space corresponding to the control channel of one signaling length is partly the same as the initial search space corresponding to the control channel of one signaling length means that the search space corresponding to the control channel of one signaling length is the same as the initial search space corresponding to the control channel of one signaling length A certain subset of the initial search space corresponding to the control channel, or increase or decrease the CCE according to the subset. and / or

If a signaling length of a control channel corresponding to a component carrier is the same as a signaling length of a control channel corresponding to other one or more component carriers, the search space corresponding to the control channel of the one signaling length is the one The entire search space formed by the initial search space corresponding to the control channel of one signaling length corresponding to the component carrier and the initial search space corresponding to the control channel of one signaling length corresponding to the other one or more component carriers or parts. Wherein, the search space corresponding to the control channel of one signaling length is the part of the search space formed by the initial search space corresponding to the control channel of the signaling length means: the search space corresponding to the control channel of one signaling length is the A certain subset of all the initial search spaces corresponding to the control channel of the signaling length, or increase or decrease the CCE according to the subset.

In the same way, the method of specifying the search space corresponding to the control channel of the signaling length according to the initial search space corresponding to the control channel of the signaling length after grouping can be obtained.

In this embodiment, for the same aggregation level, the transmitting device can determine its corresponding search space according to the signaling length of the control channel, which is beneficial to the design of the search space, can reduce the number of blind detections, reduce the conflict of the control channel, and thus reduce the control Probability of channel collision.

The specific analysis is as follows: For example, when the corresponding control channels of any one or multiple component carriers contain the same signaling length, the control channels with the same signaling length can use the same search space, and the UE performs an aggregation level The included search space, that is, when blind detection is performed on CCE resources, one detection can determine whether it is a certain control channel in the signaling length. At this time, this signaling length can flexibly use the search space of the control channel with the same signaling length, and the control channel can be flexibly mapped into this space without increasing the number of blind detections, but reducing the control channel transmission limit. Correspondingly, the collision probability of the control channel is reduced. When the signaling lengths of the two control channels are the same, there are several cases: it can be two control channels of the same format corresponding to the same component carrier; or two control channels of different formats corresponding to the same component carrier, such as the same The formats of component carriers format0 and format1A are different, but the signaling length is the same; or two control channels of the same format corresponding to different component carriers with the same bandwidth; or two control channels of different formats corresponding to different component carriers with the same bandwidth channel; or two control channels of the same format corresponding to different component carriers with the same number of antennas; or two control channels of different formats corresponding to different component carriers with the same number of antennas; or even after some additional processing, such as : Increase the padding bits, reduce the indication bits of certain information (such as: increase the granularity of resource allocation), etc., thereby reducing the number of bits used for resource allocation, etc., so that two control channels with the same format or different formats have the same information command length. The signaling length of the control channel is the main factor affecting the number of blind detections, because the receiving device needs to perform blind detection at the possible aggregation level of the various possible signaling lengths corresponding to the search space in the search space , when the same search space is used for the control channels with the same signaling length, the user equipment can determine whether it corresponds to a certain control channel of all the control channels with the same signaling length by performing a blind detection in the search space, so that The number of times of blind detection is reduced and the detection complexity is reduced.

When the signaling lengths of the control channels contained in the control channels corresponding to any one or more component carriers are different, respectively determine the search spaces corresponding to the control channels of different signaling lengths. At this time, the search spaces corresponding to the control channels of different signaling lengths Space may vary. When these search spaces do not overlap and have the same search space size as control channels of different signaling lengths, it is only necessary to detect the corresponding signaling length in the search space corresponding to the control channel of each signaling length The control channel is enough, so the collision probability of the control channel is reduced, and the number of blind detections is not increased at the same time. Therefore, the collision probability of control channels with different signaling lengths is reduced, ensuring that the control channels of the UE user equipment can be effectively scheduled and transmitted, thereby ensuring the smooth transmission of data of each UE user equipment, and improving the throughput of the user equipment , without increasing the number of blind detections.

FIG. 2a is a schematic diagram of the method for mapping control channels provided in Embodiment 2 of the present invention, and FIG. 2b is another schematic diagram of the method for mapping control channels provided in Embodiment 2 of the present invention. As shown in FIG. 2a , a component carrier The search spaces corresponding to control channels of various signaling lengths are mapped to a component carrier. As shown in Figure 2b, the search spaces corresponding to control channels of various signaling lengths corresponding to multiple component carriers are mapped to a component carrier superior. On the basis of the first embodiment of the control channel mapping method of the present invention, the control channel may be, for example, a PDCCH. In this embodiment and the following embodiments, the PDCCH is taken as an example for illustration, but the present invention is not limited on PDCCH.

In this embodiment, one component carrier may correspond to N types of PDCCH signaling lengths, and the N types of signaling lengths of PDCCHs correspond to data transmission by user equipment on one or more component carriers.

As shown in Figure 2a, when the transmitting device determines that a user equipment corresponds to N types of signaling lengths on a component carrier, for the same aggregation level, at least two control channels of the same signaling length corresponding to the same component carrier can use The same search space; and/or, for at least two control channels of different signaling lengths corresponding to the same component carrier, respectively determine corresponding search spaces, so that the at least two different signaling lengths in at least one time transmission unit The control channels use different search spaces. For example: the search spaces of PDCCHs of N types of signaling lengths corresponding to one component carrier are independently determined. For user equipment 3 (UE3), it is assumed that UE3 corresponds to three signaling lengths of PDCCH on one component carrier: N=3, corresponding to data transmission of one component carrier pair A (uplink and downlink component carrier A). The transmitting device can allocate a search space for each PDCCH of signaling length corresponding to the data transmission of a component carrier to A in the control channel area 20 on the downlink component carrier A, and allocate three search spaces in total: search space 21, search space The space 22 and the search space 23, each of which can only carry a PDCCH with a signaling length.

As shown in Figure 2b, when the transmitting device determines that control channels of various signaling lengths corresponding to multiple component carriers of a user equipment are mapped to one component carrier, for the same aggregation level, at least two Determine the corresponding search space for four control channels of the same signaling length, so that the at least two control channels of the same signaling length use the same search space; and/or, for at least two different signaling lengths corresponding to different component carriers The corresponding search spaces are respectively determined for the control channels, so that the at least two control channels with different signaling lengths use different search spaces in at least one time transmission unit. For example: the transmitting device configures that the service data of UE3 can be carried on the component carrier pair A and B, and the transmitting device configures that the control channel PDCCH of UE3 is transmitted on the downlink component carrier A, that is to say, no matter whether the downlink component carrier A of UE3 is scheduled The PDCCH corresponding to the data on the downlink component carrier B is also carried by the downlink component carrier A. For each PDCCH aggregation level, the transmitting device may allocate search spaces for control channels of various signaling lengths in the control channel region 20 on the downlink carrier A. Suppose N=2, there are two kinds of PDCCH signaling lengths X and Y on a downlink component carrier A, and there is one PDCCH signaling length X on a downlink component carrier B, then downlink component carrier A and downlink component carrier B have The same signaling length X. In Figure 2b, one search space 24 is allocated for the PDCCH with the same signaling length X on the two carriers, and another search space 25 is allocated for another PDCCH with a signaling length Y different from X on the downlink component carrier A . To sum up, search spaces may be allocated for PDCCHs of signaling lengths corresponding to multiple component carriers, including search spaces 24 and 25 , for example. The CCE numbers included in these two search spaces may be completely different, partly the same, or even completely the same. These differences affect the PDCCH collision probability of the user equipment and the PDCCH format or signaling that needs to be detected in the corresponding search space. length. For details, reference may be made to the relevant example of the first embodiment of the method for controlling channel mapping in the present invention.

In extension, FIG. 3 is another schematic diagram of the control channel mapping method provided in Embodiment 2 of the present invention. As shown in FIG. In one case, the user equipment is assigned N search spaces based on each aggregation level in all control channel regions of P component carriers, so that each signaling length of PDCCH is carried in its corresponding search space Inside. In another case, when a user equipment carries N types of PDCCH signaling lengths on P component carriers, M(M <N) search spaces, at this time at least two control channels with signaling lengths correspond to the same search space. In Figure 3, P=2, N=3, the transmitting device configures UE4’s service data to be transmitted on the paired uplink and downlink component carriers A, B, and C, and the transmitting device configures UE4’s control channel PDCCH to be transmitted on the downlink For transmission on component carrier A and downlink component carrier B, it is assumed that the signaling length of the PDCCH for scheduling UE4 includes signaling lengths X, Y, and Z. For each PDCCH aggregation level, the transmitting device can allocate a total of 3 search spaces on downlink component carrier A and downlink component carrier B, and each search space only carries a control channel with a signaling length of PDCCH, and each The number of CCEs included in the search space can be reconfigured by the transmitting device as required. Two search spaces corresponding to PDCCH signaling length X and Y can be configured: search space 31 and search space 32 are configured in the control channel region 30 of downlink component carrier A, and the search space 33 of PDCCH signaling length Z is configured in the downlink component carrier In the control channel region 34 of carrier B. The CCE numbers included in the search space 31 and the search space 32 may be the same or completely different. In addition to this method, the search space of the signaling length Z of the PDCCH can also be corresponding to the search space 31 in the control channel region 30 of the downlink component carrier A, so that the search space of the signaling length Z of the PDCCH can be distributed in multiple On the component carrier, the example above includes not only the search space 31 in the control channel region 30 of the downlink component carrier A, but also the search space 33 in the control channel region 34 of the downlink component carrier B. To sum up, all the CCEs in a search space can be distributed on one component carrier, or can be distributed on multiple component carriers.

To sum up, for one aggregation level, the search spaces corresponding to control channels of various signaling lengths can be distributed on one component carrier or multiple component carriers, and the CCE numbers in the search space can be continuous can also be discontinuous. When the search space corresponding to the control channel of the PDCCH signaling length is distributed in a component carrier, the signaling length of the PDCCH can be obtained by obtaining the starting CCE sequence number and all the CCE sequence numbers of the search space on this component carrier The corresponding search space of the control channel. When the search space corresponding to the PDCCH of the signaling length of the PDCCH is distributed in multiple component carriers, obtain the CCE sequence number included in the corresponding search space on each component carrier, and superimpose these CCEs to obtain this PDCCH The search space corresponding to the PDCCH of the signaling length. If the CCE serial numbers in the corresponding search space on a component carrier are always continuous, according to the determined starting CCE serial number of the search space and the number of CCEs included in the search space, the serial numbers of all the CCEs included in the search space can be known.

In this embodiment, determining the search space corresponding to the PDCCH of a certain signaling length may include the following examples:

Example 1: Determine the starting position and size of the search space corresponding to the PDCCH of a certain signaling length.

The initial position of the search space corresponding to the control channel can be determined according to the signaling length identifier or signaling length group identifier; or according to the signaling length identifier or signaling length group identifier, and user equipment identifier, control Any one or more of the channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number or aggregation level determines the start position of the search space corresponding to the control channel. Wherein, the signaling length identifier and the signaling length group identifier may be system-specific signaling length identifiers, that is, absolute signaling length identifiers, or may be UE-specific signaling length identifiers, that is, relative signaling length identifiers; the control channel The corresponding CC ID may also be a system-specific CC ID, that is, an absolute CC ID, or a UE-specific CC ID, that is, a relative CC ID.

The starting position of the search space is determined, that is, the sequence number of the CCE of the starting position may be calculated according to a user equipment identifier (UEID), for example. Since the same UE may have different UEIDs corresponding to different component carriers, the UEID can be used to calculate the starting position of the search space, so that the starting positions of the search space of different component carriers at the same aggregation level will be different. The UEID is used to calculate the starting position of the search space corresponding to the control channel of a UE in subframe k, for example, it may be calculated by the following formula (1) and formula (2).

Y _k ＝(A×Y _k-1 )modD(1)

Wherein A can be 39827 for example, D can be 65537 for example, the iteration value Y _k can be regarded as the iteration value that changes with the subframe number k, wherein Y _-1 is the iteration initial value when k=0, and the iteration initial value is generally It is the UEID or C-RNTI assigned by the system to the user equipment, which is equal to n _RNTI , and the initial value of the iteration is not 0; L is the aggregation level (aggregation level), N _{cce, k} is the control channel transmission used by the system in the kth subframe The total number of CCEs; the iterative value Y _k of the current subframe is obtained by multiplying the iterative value Y _k-1 of the previous subframe by the constant A and taking the modulus of D; so the iterative value Y _k of the current subframe is the previous K The result obtained by iterative operation of the iterative value of -1 subframe; where mod operation means modulus; Z _k means that in the kth subframe, if the system assigns the aggregation level to the user equipment whose user equipment identifier is n _RNTI is L The control channel, the starting position of the search space corresponding to the control channel.

The transmitting device assigns different UEIDs to different UEs. The UEIDs can not only be used to identify different UEs in the same cell, but also have the function of randomizing the starting position of the search space when calculating the search space. This randomization method can also randomize the distribution of search spaces corresponding to the control channels between UEs to a certain extent, and reduce the collision of control channels between UEs.

In addition to determining the sequence number of the starting CCE of the search space using UEID, it can also determine the sequence number of the CCE at the starting position of the search space together with the signaling length identifier. Specifically, the signaling of the PDCCH supported by the UE in the current subframe can be Length is identified. Due to the different number of PDCCH signaling lengths supported by different UEs, the identifiers used for the signaling lengths of the same PDCCH may also be different, which have UE-specific characteristics and are relative signaling length identifiers used by UEs; of course, The signaling lengths of all PDCCHs supported by the system may also be identified absolutely, and the signaling length of the PDCCH corresponding to the signaling length of the PDCCH of the UE may be used for identification. Among them, the UE-specific PDCCH signaling length identifier is used to partition the search space corresponding to the PDCCH of various signaling lengths, and the same UE has different PDCCH signaling length identifiers corresponding to different PDCCH signaling lengths, for example: The following formulas (3) and (4) calculate the starting position:

Y _k ＝(A×Y _k-1 ×M _{k, p} ) mod D(3)

In formulas (3), (4), M _{k, p} is the signaling length identifier (LengthID) of the PDCCH corresponding to the p-th control channel signaling length in subframe k, M _{k, p} is not 0, and other parameters The meaning is the same as formula (1) and formula (2).

From the above two examples, it can be seen that when another parameter different from UEID is introduced, such as signaling length identifier or component carrier identifier, when it acts on the calculation of the sequence number of the starting CCE in the search space, it is in principle equivalent to the current Another UEID is used in the subframe. When the two make Y _{k in a certain subframe equal to Y k corresponding} to another UEID through time changes, another parameter introduced such as the signaling length identifier or component carrier identifier cannot be dynamically changed with the subframe , for example, the component carrier identifier corresponding to the UE may change semi-statically. In this way, when Y _k corresponding to two users in a certain subframe is equal, Y _k will continue to be equal in the next subframe, so that the two The user's control channel will continue to collide. The solution can be to no longer allocate another UEID that is equivalent to the two parameters, which will affect the allocation method of UEID; another alternative method can also be to use non-multiplicative (such as additive relationship) for M _{k, p} , This way random subframe changes don't cause constant collisions.

Since the number of all CCEs allocated to the control channel may be involved when the initial position of the search space is determined using the signaling length identifier of the PDCCH, so in this embodiment, all the CCEs allocated to the control channel can be further Carry out division, that is, space division, to further determine the starting position of the search space. For example, if all the CCEs allocated to PDCCH are 100, when using the PDCCH signaling length to identify the calculation, in order to avoid the calculation result exceeding the above 100 CCEs, the calculation result can be limited to the 100 CCEs, for example, the calculation result Take the modulo by 100. In this way, the starting positions of the search spaces obtained by calculating the signaling length identifiers of different PDCCHs may be the same. In order to further avoid overlapping of search spaces corresponding to control channels of different signaling lengths of a UE, all CCEs may be divided into two groups, that is, the entire search space allocated to the PDCCH is divided into two. In this way, part of the search space can only be located in the first divided space, and other search spaces can only be located in the second divided space. In order to better avoid control channel collisions, the search space may be divided according to the number or types of signaling lengths of the PDCCH. For example, if there are N signaling lengths of PDCCHs in total, the entire search space allocated to the control channel is divided into N pieces, and the search space of the signaling length of each PDCCH can only be in the corresponding division space, so that different The CCEs included in the search space corresponding to the PDCCH of the signaling length do not overlap. Without changing the number of blind detections, the mapping areas of PDCCHs of various signaling lengths corresponding to a UE are different, which can reduce the collision of the control channel; A CCE region may be allocated for PDCCHs of various signaling lengths, so that the CCEs included in the search spaces corresponding to PDCCHs of some signaling lengths overlap. For example, the starting position of the search space corresponding to the control channel of a UE in subframe k can be calculated by the following formula (5) and formula (6).

Y _k ＝(A*Y _k-1 )mod D(5)

In formula (5) and formula (6), N is the number of spaces in which the entire control channel is divided into N; n is the signaling length of the nth control channel, and generally n<=N, other parameters The meaning of is the same as formula (1) and formula (2).

The size of the search space refers to the number of CCEs included in the search space, and the size of the search space may be fixed or variable. The size of the search space corresponding to the control channel of the signaling length may be determined according to a signaling notification manner, for example, dynamically changed according to the signaling. Or determine the size of the search space corresponding to the control channel of the signaling length according to the number of control channels, which may be determined by a standard protocol, for example: use a standard protocol to determine the size of the search space, for example, according to the current signaling length The number of control channels confirms the size of the search space, etc.; or determines the size of the search space corresponding to the control channel of the signaling length according to a determined algorithm; or determines the size of the search space corresponding to each aggregation level in the existing LTE system. The size of the search space corresponding to the control channel of the signaling length at the same aggregation level.

Example 2: According to the initial search space corresponding to the control channel of the signaling length, determine the search space corresponding to the control channel of the signaling length. For details and steps involved, refer to the relevant description of Embodiment 1 of the present invention. For example: FIG. 4 is a schematic diagram of a control channel search space determination method in the control channel mapping method provided in Embodiment 2 of the present invention. As shown in FIG. 4 , a component carrier pair S includes a downlink component carrier S and its corresponding uplink component carrier S , the component carrier pair S corresponds to the signaling length A, C, and the initial search space corresponding to the two signaling lengths A and C corresponds to the area labeled 41 in the downlink component carrier S (PDCCH carrier S); the component carrier pair T is Including the downlink component carrier T and its corresponding uplink component carrier T, the uplink component carrier T corresponds to the signaling length A, B, and the initial search space corresponding to the control channel of the two signaling lengths A and B corresponds to the downlink component carrier T (PDCCH The area labeled 42 in carrier T). The signaling length C corresponding to the component carrier pair S and the signaling length B corresponding to the component carrier pair T are unique signaling lengths. Therefore, for the control channel and the component carrier of the signaling length C corresponding to the component carrier pair S The search space corresponding to the control channel of the signaling length B corresponding to T is completely or partially the same as the corresponding initial search space, for example: the search space corresponding to the control channel of the signaling length C corresponding to the component carrier pair S is Its initial search space 41 , the size of the search space corresponding to the control channel of the signaling length B corresponding to the component carrier pair T is its initial search space 42 . In addition, the signaling length A corresponding to the component carrier pair S is the same as the signaling length A corresponding to the component carrier pair T, and the signaling length A corresponding to the component carrier pair S is corresponding to the control channel of the signaling length A corresponding to the component carrier pair T. The search spaces of can be the same, and the size of the search space can be: the search space corresponding to the control channel of signaling length A can be part or all of the initial search space of signaling length A corresponding to the component carrier pair S and T. For example, the entire initial search space is used, which is specifically expressed as the search space corresponding to the control channel of the signaling length A corresponding to the component carrier pair S and the signaling length A corresponding to the component carrier pair T, and the corresponding initial search space. That is, initial search space 41 and initial search space 42 . In addition, the control channel of the signaling length A corresponding to the component carrier pair S is part of the initial search space of the signaling length A corresponding to the component carrier pair T refers to: according to a certain subset of the control channel of the signaling length A The corresponding initial search space is changed by increasing or decreasing the included CCE. Among them, the method of determining the initial search space can be divided into multiple cases. In one case, the initial search space corresponding to each component carrier is determined, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier is the initial search space of the same component carrier. At this time, the initial position of the initial search space corresponding to each component carrier may be determined according to any one or more of the user equipment identifier, space division, component carrier identifier, subframe sequence number, or aggregation level. In another case, determine the initial search space corresponding to the control channel of each signaling length corresponding to each component carrier; if there are at least two identical signaling lengths in the signaling lengths corresponding to the same component carrier, then use The at least two control channels with the same signaling length use the same initial search space; and/or if there are at least two different signaling lengths in the signaling lengths corresponding to the same component carrier, then at least one time The at least two control channels of different signaling lengths in the transmission unit use different initial search spaces. At this time, according to the signaling length identifier or the signaling length group identifier, determine the initial search space corresponding to the control channel of each signaling length corresponding to each component carrier; or according to the signaling length identifier or signaling length Any one or more of the group identifier, user equipment identifier, control channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number, or aggregation level, determine the length of each signaling corresponding to each component carrier The starting position of the initial search space corresponding to the control channel. In another case, after the component carriers are grouped, the initial search space corresponding to each component carrier group is determined, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier group is the same The initial search space of the component carrier group. At this time, the initial position of the initial search space corresponding to each component carrier group is determined according to any one or more of the user equipment identifier, space division, component carrier group identifier, subframe sequence number, or aggregation level. The specific method of determining the initial position of the initial search space can refer to the above-mentioned formulas (1) to (6) and related descriptions, and it can be realized only by modifying the corresponding parameters. In addition, for the method of grouping component carriers, reference may be made to the relevant descriptions in Embodiment 1 of the present invention.

Further, in this embodiment, for each aggregation level, the CCEs included in the search space corresponding to the control channel determined according to the control channel signaling length may be discontinuous, continuous, or distributed in one on a carrier, or distributed over multiple carriers. In the case of discontinuous CCEs, obtain discontinuous rules of CCEs.

Further, in this embodiment, for each aggregation level, the determined positional relationship between control channels of different signaling lengths may be discontinuous, continuous, non-overlapping at all, or Partially or completely overlapped.

In this embodiment, when determining the search space corresponding to the control channel corresponding to the component carrier, the positional relationship between the search spaces may be determined according to the signaling length of the control channel, including the following examples:

Example 1: If the signaling lengths of the control channels corresponding to different component carriers are the same, it is determined that the search spaces corresponding to the component carriers with the same signaling length overlap completely or partially overlap, and the control channels include carrier indication information.

Wherein, when the search spaces completely overlap, the corresponding starting positions and sizes of the search spaces corresponding to component carriers with the same control channel signaling length are the same; when the search spaces partially overlap, the corresponding control channel signaling members with the same length The search space corresponding to the carrier includes at least one same CCE. Since the signaling lengths of the control channels corresponding to component carriers whose search spaces completely overlap or partially overlap are the same, making the search spaces overlap can greatly reduce the number of times of blind detection. For example: when the data transmission modes of a pair of uplink and downlink component carrier A and component carrier B are the same, the signaling length of the corresponding PDCCH for scheduling the data transmission of each carrier pair is the same, at this time, preferably the two search spaces The CCE numbers included are exactly the same. In this case, it can be considered that there is only one search space, and the PDCCHs corresponding to the two carriers can be carried at any position in this search space, which increases the flexibility of control channel placement, but the number of blind detections is due to the The signaling length of the PDCCH for scheduling multiple carriers is the same without increasing. At this time, each PDCCH needs to have carrier indication information to indicate which carrier is scheduled, and the carrier indication information can be realized by scrambling the carrier specific information or having a word field display indication in the PDCCH. Assuming that the search space corresponding to each aggregation level is M, if one transmission mode corresponds to two PDCCH signaling lengths, within the search space M, the user equipment needs 2M times of blind detection. When the control channel search spaces of the signaling lengths corresponding to different component carriers overlap completely or partially, the purpose of reducing control channel conflicts can be achieved by increasing the size of the search spaces. For example, when the aggregation level is 8 CCEs, the search space in the existing solution is 16 CCEs. In order to reduce the collision of the control channel, the size of the search space corresponding to the control channel of the signaling length can be made larger than 16 CCEs, for example, including 32 CCEs.

Example 2: If the signaling lengths of the control channels corresponding to different component carriers are different, it is determined that the search spaces corresponding to the component carriers with different signaling lengths do not overlap.

For example: when the data transmission modes of uplink and downlink component carrier pair A and component carrier pair B are different, that is, the signaling length of the corresponding PDCCH for scheduling data transmission on each component carrier pair may be different, and each component carrier pair is based on It needs to be configured according to its own transmission characteristics, and each component carrier pair has different signaling lengths of several PDCCHs. At this time, preferably, the CCE numbers included in the two search spaces are completely different. In this case, it can be considered that component carrier pairs A and B have independent search spaces corresponding to control channels with respective carrier signaling lengths. The PDCCHs corresponding to the component carrier pairs can only be carried and transmitted in their corresponding search spaces. In this way, the PDCCH does not need to have information indicating which component carrier pair to schedule, and the information on the specific search space of the component carrier pair indicates which component carrier to schedule, thereby saving the signaling overhead of the PDCCH. Suppose a search space corresponding to each aggregation level is M. If one transmission mode corresponds to two PDCCH signaling lengths, in the search space M, the user equipment needs M times of blind detection in each search space, but the user equipment needs a total of M+M= 2M blind detections. When the search spaces do not overlap, the number of blind detections will not be reduced, but the size of the search space can be properly reduced or kept the same as that of the LTE system.

When the search spaces corresponding to the control channels of different component carriers do not overlap for the same aggregation level, the carrier indication information of the component carriers, such as identification information and carrier index, may not be transmitted any more. This is because for the same aggregation level, the search spaces of different component carriers do not overlap, so that the UE can know when it detects a PDCCH in a specific search space, and the PDCCH corresponds to the component carrier corresponding to this search space. For the same aggregation level, when the search spaces corresponding to the control channels of different component carriers partially overlap or overlap, the component carrier identification information needs to be transmitted so that the UE can know the corresponding PDCCH detected by the UE in a certain search space. Which component carrier is used.

Example 3: The search spaces corresponding to the control channels of the signaling lengths corresponding to the component carriers are determined to partially overlap.

The method in Example 1 can be used to make the search space corresponding to the control channel corresponding to the signaling length corresponding to the component carrier only partially overlap in some cases. In this case, it can not only reduce the collision of the control channel, but also reduce the blindness to a certain extent. The number of detections. In addition, in the third example, the search spaces corresponding to the two control channels with the same signaling length or different signaling lengths may be determined separately, that is, independent, without dependencies and rules. For example, the search spaces corresponding to two control channels with different signaling lengths can be determined according to the different signaling length identifiers corresponding to the two different signaling lengths, or respectively according to the component carriers where the two control channels with different signaling lengths are located. identified, or determined by combining any one or more of the above correlation quantities; or/and, the search spaces corresponding to two control channels with different signaling lengths can also be determined according to two different signaling lengths The lengths correspond to different identical signaling length identifiers, or are determined according to the component carrier identifiers where two control channels with different identical signaling lengths are located, or are determined by combining any one or more of the above correlation quantities. , the embodiment of the present invention does not limit the selection of specific identification parameters. In this way, at the same time, the search spaces corresponding to the two control channels with the same signaling length or different signaling lengths are the search spaces corresponding to the two control channels with different signaling lengths It may be the same, or it may be different, that is, the search space corresponding to the control channel of the signaling length corresponding to the component carrier may only partially overlap, which is determined by the randomization of the search space determination method by the parameters for determining the search space, or is an independently determined method, and is not limited by the present invention.

Further, the transmitting device may set the search space corresponding to at least one control channel of specified signaling length corresponding to the user equipment as the search space for priority detection, and set the search space corresponding to other non-specified signaling length control channels corresponding to the user equipment The corresponding search space is set as the search space for extended detection. Since the component carrier carrying the control channel can be preferably the primary carrier of the user equipment, the primary carrier is a component carrier that needs to be continuously detected by the user equipment in the connected state, and the channel condition of the primary carrier is relatively good. In this way, the PDCCH corresponding to the user equipment Therefore, the signaling length of those PDCCHs corresponding to the main carrier can be used as the specified signaling length, and the search space corresponding to the control channel of the signaling length of the PDCCH corresponding to the main carrier can be set as the search space for priority detection . In addition, the search space corresponding to the control channel of the signaling length of the PDCCH that occurs more frequently and occurs with a higher probability can be set as the search space for priority detection, and the control channels of the signaling length of other PDCCHs can be set as extended The search space for detection. The agreement stipulates how to determine the priority detection search space and the extended detection search space, as well as the signaling length, format and other information included in the priority detection search space and the extended detection search space. The sending end notifies the receiving device through proprietary signaling, and the specific proprietary signaling may include: high-layer semi-static signaling, physical layer dynamic signaling, media access layer control channel, and the like.

The transmitting device preferentially schedules the control channel of the signaling length of the PDCCH corresponding to the main carrier; or preferentially schedules the control channel of the signaling length of the PDCCH that occurs more frequently and occurs with a higher probability; or the PDCCH determined by other methods Signaling length of the control channel to transmit data. In addition, the search space for priority detection and the search space for extended detection may not overlap or overlap. If they do not overlap, for one aggregation level, the search space corresponding to the control channel with the signaling length of PDCCH is the search space for priority detection and the search space for extended detection. All CCE numbers in the search space for extended detection; if overlapping, the search space corresponding to the control channel of the PDCCH signaling length is all the CCE numbers included in the search space for priority detection or the search space for extended detection.

In LTE, for some user equipments that need to monitor the control channel, blind detection must be performed on the common search space corresponding to at least one component carrier. Therefore, when there are remaining CCE resources in the common search space that can be used to map and transmit only one PDCCH of the user equipment, the PDCCH of the user equipment can be carried in this common search space for transmission. At this time, when there are no remaining CCE resources in the common search space that can be used to map and transmit the PDCCH of the user equipment, the signaling length of those PDCCHs corresponding to the main carrier of the user equipment; Only one or more PDCCHs in the signaling lengths of PDCCHs that appear with a higher probability are transmitted in the priority detection search space; if there are other signaling lengths of PDCCHs, then the PDCCHs The bearer is mapped and transmitted within the extended detection search space.

In this embodiment, on one or several downlink component carriers, the transmitting device can allocate multiple search space. The control channel of each signaling length can be mapped in the allocated search space. For the transmitting device, the search space is the CCE area where the transmitting device can map the PDCCH. For the receiving device, the search space is determined by the blind detection of the control channel of the receiving device. CCE area. According to the type of signaling length of the control channel that the user equipment may transmit in a period of time, the transmitting device can allocate independent search spaces for each/several formats of control channels, and these search spaces can be in one or several component carriers and the size of the search space can be configured according to the number and/or probability of user equipment corresponding to each signaling length, or can be changed according to the initial search space corresponding to each component carrier, so that each signaling length The search space corresponding to the control channel and the number of CCEs it includes are changed according to requirements on one or several component carriers. For example: when the number and/or probability of occurrence of a PDCCH of a certain signaling length is large, increase the number of CCEs included in the corresponding search space, which can accommodate the increase in the number of transmission control channels, which can reduce the number of transmissions with other user equipment control channels. collision probability. Conversely, when the number and/or probability of occurrence of a PDCCH of a certain signaling length is small, the number of CCEs included in the search space is configured to be small, so that the resources used to transmit the control channel are small, and the blind detection control of the user equipment is reduced. The number of channels reduces the complexity of user equipment processing and saves battery power consumption.

In this embodiment, the component carrier may also be replaced by a component carrier pair, a component carrier group, a component carrier set or a component carrier pair set, and the component carrier identifier may be replaced by a component carrier pair identifier, a component carrier group identifier, or a component carrier set identifier Or the set ID of the component carrier pair. Therefore, the description of the component carrier is also applicable to the component carrier pair, the component carrier group, the component carrier set or the component carrier pair set. For example, in the case of many component carriers, in order to reduce the number of search spaces and the complexity of user equipment detection, component carriers or component carrier pairs may be grouped, and each group is a component carrier set. At this time, the component carrier may be replaced by a set of component carriers.

FIG. 5 is a flowchart of a method for detecting a control channel provided in Embodiment 3 of the present invention. As shown in FIG. 5 , the method for detecting a control channel includes the following steps:

Step 51. For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, determine the corresponding search space for at least two control channels with the same signaling length, so that the at least two control channels with the same signaling length use the same search space.

Step 52. In the determined same search space, detect a control channel with a signaling length included in the same search space.

Wherein, making at least two control channels of the same signaling length use the same search space specifically includes: making at least two control channels of the same signaling length corresponding to different component carriers use the same search space; or making the same component carrier correspond to At least two control channels of the same signaling length use the same search space.

The above step 51 and step 52 are methods in the case where there are at least two control channels of the same signaling length in one or more component carriers, when there are at least two control channels of different signaling lengths in one or more component carriers , step 51 and step 52 can also be performed as follows or together with the following steps:

For the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, corresponding search spaces are respectively determined for at least two control channels with different signaling lengths, so that in at least one time transmission unit, the at least two different signaling Control channels of different lengths use different search spaces, and detect control channels of signaling lengths included in the different search spaces in the determined different search spaces.

The corresponding search spaces are respectively determined for at least two control channels with different signaling lengths, so that the at least two control channels with different signaling lengths use different search spaces in at least one time transmission unit, specifically including: For at least two control channels of different signaling lengths corresponding to the component carrier, respectively determine corresponding search spaces, so that the at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit; or For at least two control channels of different signaling lengths corresponding to the same component carrier, corresponding search spaces are respectively determined, so that the at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit.

When the user equipment UE detects the control channel, according to the signaling length of the control channel corresponding to the component carrier, the method for determining the search space corresponding to the control channel specifically includes the following examples:

Example 1. The user equipment determines the initial position and size of the search space corresponding to the control channel, wherein the method for the user equipment to determine the initial position of the search space corresponding to the control channel is: according to the signaling length identifier or signaling length group identification, determining the starting position of the search space corresponding to the control channel; or according to the signaling length identification or signaling length group identification, and user equipment identification, control channel format identification, space division, component carrier identification corresponding to the control channel, Any one or more of the subframe sequence number or aggregation level determines the start position of the search space corresponding to the control channel. For details, reference may be made to related descriptions of determining the starting position and size of the search space in Embodiments 1 and 2 of the present invention.

Example 2: The user equipment determines the search space corresponding to the control channel of the signaling length according to the initial search space corresponding to the control channel of the signaling length.

Among them, the method for the user equipment to determine the initial search space corresponding to the control channel of the signaling length can be divided into multiple cases.

In one case, the initial search space corresponding to the control channel of the signaling length is obtained through the following steps:

An initial search space corresponding to each component carrier is determined, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier is the initial search space of the same component carrier.

At this time, the initial search space corresponding to each component carrier is determined according to any one or more of the user equipment identifier, space division, component carrier identifier, subframe sequence number, or aggregation level.

In another case, the initial search space corresponding to the control channel of the signaling length is obtained through the following steps:

Step 1. Determine the initial search space corresponding to each signaling length control channel corresponding to each component carrier;

Step 2: If there are at least two identical signaling lengths among the signaling lengths corresponding to the same component carrier, make the at least two control channels of the same signaling length use the same initial search space; and/or if There are at least two different signaling lengths among the signaling lengths corresponding to the same component carrier, so that the control channels of the at least two different signaling lengths use different initial search spaces in at least one time transmission unit.

At this time, the initial search space starting position corresponding to each signaling length control channel corresponding to each component carrier can be determined according to the signaling length identifier or the signaling length group identifier; or can be determined according to the signaling length identifier or signaling length Any one or more of the length group identifier, user equipment identifier, control channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number or aggregation level, and determine each signaling length corresponding to each component carrier The control channel corresponding to the initial search space starting position.

In another case, if the component carriers are grouped, the initial search space corresponding to the control channel of the signaling length is obtained through the following steps:

An initial search space corresponding to each component carrier group is determined, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier group is the initial search space of the same component carrier group.

At this time, the initial search space corresponding to each component carrier group is determined according to any one or more of the user equipment identifier, space division, component carrier group identifier, subframe sequence number, or aggregation level.

After the user equipment determines the initial search space corresponding to the control channel of the signaling length, according to the initial search space corresponding to the control channel of the signaling length, the method for determining the search space corresponding to the control channel of the signaling length is:

If the signaling length of the control channel corresponding to one component carrier is different from the signaling length of the control channel corresponding to one or more other component carriers, the search space corresponding to the control channel of the one signaling length and the one signaling length Make the initial search spaces corresponding to the length of the control channel completely the same or partly the same; and/or

If a signaling length of a control channel corresponding to a component carrier is the same as a signaling length of a control channel corresponding to other one or more component carriers, the search space corresponding to the control channel of the one signaling length is the one The entire search space formed by the initial search space corresponding to the control channel of one signaling length corresponding to the component carrier and the initial search space corresponding to the control channel of one signaling length corresponding to the other one or more component carriers or parts. Wherein, wherein, the search space corresponding to a control channel of a signaling length is the part of the search space formed by the initial search space corresponding to the control channel of the signaling length means: the search space corresponding to a control channel of a signaling length is A certain subset of all the initial search spaces corresponding to the control channel of the signaling length, or increase or decrease the CCE according to the subset.

After determining the search space corresponding to the corresponding control channel according to the signaling length, the user equipment may perform blind detection on the control channel of the signaling length included in the search space in the determined search space.

Further, if the control channel with specified signaling length is mapped to the priority detection search space in the control channel mapping method, the control channel with non-specified signaling length is mapped to the extended detection search space. Correspondingly, if there is a control channel with a specified signaling length in the search space first, then it is detected whether there is a control channel with a non-specified signaling length in the extended detection search space; otherwise, it is not detected whether there is a non-specified signaling length in the extended detection search space. A control channel of the specified signaling length.

Specifically, when the user equipment blindly detects the control channel, in addition to detecting the common search space, it may first confirm whether there is a signaling length corresponding to the user equipment in the priority detection search space. If the user equipment detects the control channel of its own signaling length in the priority detection search space, the user equipment will continue to perform detection in the extended detection search space. It does not stop until all the search spaces that need to be detected are blindly detected. However, if the user equipment does not detect the control channel of its own signaling length in the priority detection search space, the user equipment will not continue to detect the extended detection search space, and directly stop detection.

The control channel in this embodiment may be, for example, a PDCCH, but this embodiment of the present invention is not limited to the PDCCH. Moreover, the embodiment described in this embodiment using the signaling length of the control channel as an example is also applicable to the format set or signaling length set of the control channel.

In this embodiment, the user equipment can determine the initial position and size of the search space according to the control channel of the signaling length, and then perform detection in the determined search space, since the initial position and size of the search space can be flexible on the network side Configuration can reduce the probability of control channel collision. In addition, distinguishing the priority detection search space and expanding the detection search space can avoid unnecessary blind detection of the user equipment in all search spaces, reduce the number of times the user equipment blindly detects the control channel, thereby saving the power consumption of the user equipment, and also Avoid the problem of excessive blind detection errors.

FIG. 6 is a schematic structural diagram of a transmitting device provided in Embodiment 4 of the present invention. As shown in FIG. 6 , the transmitting device includes a first processing module 61 and/or a second processing module 62 . Wherein, the first processing module 61 includes: a first search space determining module 611, configured to, for the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, determine the corresponding A search space, enabling the at least two control channels of the same signaling length to use the same search space; and a first mapping module 612, configured to map the at least two control channels of the same signaling length to the first search space The corresponding search space determined by the determining module 611;

The second processing module 62 includes: a second search space determining module 621, configured to determine corresponding search space for at least two control channels with different signaling lengths according to the signaling length of the control channel corresponding to the component carrier for the same aggregation level. space, so that the at least two control channels of different signaling lengths use different search spaces in at least one time transmission unit; and the second mapping module 622 is used to map the at least two control channels of different signaling lengths are respectively mapped to corresponding search spaces determined by the second search space determination module 621 .

Further, the first search space determining module 611 may include: a first determining unit 6111 or a second determining unit 6112 .

Wherein, the first determining unit 6111 is configured to determine corresponding search spaces for at least two control channels with the same signaling length according to the signaling lengths of the control channels corresponding to the component carriers, so that at least two identical signal channels corresponding to different component carriers Let the length of the control channel use the same search space. The second determination unit 6112 is configured to determine corresponding search spaces for at least two control channels of the same signaling length according to the signaling length of the control channel corresponding to the component carrier, so that at least two control channels of the same signaling length corresponding to the same component carrier The control channels use the same search space.

The second search space determining module 621 includes: a third determining unit 6211 or a fourth determining unit 6212 .

Wherein, the third determining unit 6211 is configured to determine corresponding search spaces for at least two control channels of different signaling lengths corresponding to different component carriers, so that the at least two different signaling lengths in at least one time transmission unit Control channels of different lengths use different search spaces. The fourth determining unit 6212 is configured to determine corresponding search spaces for at least two control channels of different signaling lengths corresponding to the same component carrier, so that the at least two control channels of different signaling lengths in at least one time transmission unit Control channels use different search spaces.

Further, the first search space determining module 611 and/or the second search space determining module 621 may further include: a position determining unit 63 and/or an initial search space unit 64 . Wherein the position determination unit 63 is configured to determine the initial position and size of the search space corresponding to the control channel. The initial search space unit 64 is configured to determine a search space corresponding to the control channel of the signaling length according to the initial search space corresponding to the control channel of the signaling length.

Wherein, the position determination unit 63 includes:

The start position determination subunit 631 is configured to determine the start position of the search space corresponding to the control channel according to the signaling length identifier or the signaling length group identifier; or according to the signaling length identifier or the signaling length group identifier, and Any one or more of user equipment identifier, control channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number or aggregation level determines the start position of the search space corresponding to the control channel. For specific methods, reference may be made to the relevant descriptions in Embodiments 1 and 2 of the present invention.

The initial search space unit 64 includes: a first initial search space subunit 641 , a second initial search space subunit 642 or a third initial search space subunit 643 , and also includes a fourth initial search space subunit 644 .

The first initial search space subunit 641 is configured to determine the initial search space corresponding to each component carrier, wherein the initial search space corresponding to the control channel of each signaling length corresponding to the same component carrier is the initial search space of the same component carrier space.

The second initial search space subunit 642 is configured to determine the initial search space corresponding to the control channel of each signaling length corresponding to each component carrier; if there are at least two identical signal lengths in the signaling length corresponding to the same component carrier signaling length, then make the at least two control channels with the same signaling length use the same initial search space; and/or if there are at least two different signaling lengths in the signaling lengths corresponding to the same component carrier, then The at least two control channels with different signaling lengths use different initial search spaces in at least one time transmission unit.

The third initial search space subunit 643 is configured to determine the initial search space corresponding to each component carrier group after grouping the component carriers, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier group The space is the initial search space of the same component carrier group.

The fourth initial search space subunit 644 is configured to: if a signaling length of a control channel corresponding to a component carrier is different from a signaling length of a control channel corresponding to other one or more component carriers, the The search space corresponding to the control channel is completely the same or partly the same as the initial search space corresponding to the control channel of the one signaling length; The control channels corresponding to the component carriers have the same signaling length, and the search space corresponding to the control channel of the one signaling length is the initial search space corresponding to the control channel of the one signaling length corresponding to the component carrier and All or part of the search space formed by the initial search space corresponding to the control channel of one signaling length corresponding to the other one or more component carriers

Specifically, the method of initial search space unit 64 according to the initial search space corresponding to the control channel of the signaling length may include a variety of situations:

Case 1: The first initial search space subunit 641 determines the initial search space corresponding to each component carrier, where the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier is the initial search space of the same component carrier .

At this time, the initial position of the initial search space corresponding to each component carrier may be determined according to any one or more of the user equipment identifier, space division, component carrier identifier, subframe sequence number, or aggregation level.

Case 2: The second initial search space subunit 642 determines the initial search space corresponding to the control channel of each signaling length corresponding to each component carrier; if there are at least two identical signal lengths in the signaling length corresponding to the same component carrier signaling length, then make the at least two control channels with the same signaling length use the same initial search space; and/or if there are at least two different signaling lengths in the signaling lengths corresponding to the same component carrier, then The at least two control channels with different signaling lengths use different initial search spaces in at least one time transmission unit.

At this time, the initial search space corresponding to the control channel of each signaling length corresponding to each component carrier can be determined according to the signaling length identifier or the signaling length group identifier; or according to the signaling length identifier or the signaling length Any one or more of the length group identifier, user equipment identifier, control channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number or aggregation level, and determine each signaling length corresponding to each component carrier The control channel corresponds to the starting position of the initial search space.

Case 3: The third initial search space subunit 643 determines the initial search space corresponding to each component carrier group, where the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier group is the initial search space of the same component carrier group initial search space. In case three, the transmitting device may further include a grouping unit, configured to group the component carriers. The method of grouping may include but not limited to: dividing each pair of uplink and downlink component carriers into a group; or dividing component carriers with the same transmission mode into a group; or dividing component carriers with the same transmission bandwidth into a group group; or divide component carriers with the same number of transmission antennas into a group, etc.

At this point, the initial position of the initial search space corresponding to each component carrier group may be determined according to any one or more of the user equipment identifier, space division, component carrier group identifier, subframe sequence number, or aggregation level.

In this embodiment, the specific method for the initial search space unit to determine the initial search space corresponding to the control channel of the signaling length can refer to the relevant descriptions in the first and second embodiments of the present invention.

After the initial search space unit 64 determines the initial search space corresponding to the control channel of the signaling length, the fourth initial search space subunit 644 determines the signaling length according to the initial search space corresponding to the control channel of the signaling length The search space corresponding to the control channel of , specifically includes:

If the signaling length of the control channel corresponding to one component carrier is different from the signaling length of the control channel corresponding to one or more other component carriers, the search space corresponding to the control channel of the one signaling length and the one signaling length Make the initial search spaces corresponding to the length of the control channel completely the same or partly the same; and/or

If a signaling length of a control channel corresponding to a component carrier is the same as a signaling length of a control channel corresponding to other one or more component carriers, the search space corresponding to the control channel of the one signaling length is the one The entire search space formed by the initial search space corresponding to the control channel of one signaling length corresponding to the component carrier and the initial search space corresponding to the control channel of one signaling length corresponding to the other one or more component carriers or parts. For details, reference may be made to relevant descriptions in Embodiments 1 and 2 of the present invention.

Still further, the first search space determination module 611 and/or the second search space determination module 621 are further configured to set the search space corresponding to the control channel of the determined signaling length as the search space for priority detection, and set the non-determined signal Let the search space corresponding to the length of the control channel be set as the search space of the extended detection.

For the same aggregation level, the transmitting device provided in this embodiment can set different search spaces according to the signaling length of the control channel, which can reduce the conflict of the control channel. In addition, the transmitting device may also make the search spaces corresponding to the control channels corresponding to the signaling lengths of the same control channels overlap or partially overlap, so as to reduce the number of times of UE blind detection, or make the control channel search spaces corresponding to different signaling lengths different from each other. overlap, to implicitly inform the UE of the signaling length corresponding to the search space, so as to save signaling overhead. And the transmitting device can also map the search space corresponding to the control channel of the determined signaling length to the priority detection search space, so that the UE can preferentially detect the control channel in the search space corresponding to the control channel of the determined signaling length, reducing Blind detection times.

FIG. 7 is a schematic structural diagram of a receiving device provided by Embodiment 5 of the present invention. As shown in FIG. 7 , the receiving device includes: a first processing module 71 and/or a second processing module 72 . Wherein, the first processing module 71 includes: a first search space determining module 711, configured to, for the same aggregation level, according to the signaling length of the control channel corresponding to the component carrier, determine the corresponding a search space, so that the at least two control channels with the same signaling length use the same search space; and a first detection module 712, configured to detect within the same search space determined by the first search space determination module 711 said same search space includes control channels of signaling length;

The second processing module 72 includes: a second search space determination module 721, configured to determine corresponding search space for at least two control channels with different signaling lengths according to the signaling length of the control channel corresponding to the component carrier for the same aggregation level. space, so that the at least two control channels with different signaling lengths use different search spaces in at least one time transmission unit; and the second detection module 722 is used to determine the In different search spaces, respectively detect the control channels of the signaling lengths included in the different search spaces.

Further, the first search space determining module 711 may further include: a first determining unit 7111 or a second determining unit 7112 .

Wherein, the first determining unit 7111 is configured to determine corresponding search spaces for at least two control channels with the same signaling length according to the signaling length of the control channel corresponding to the component carrier, so that at least two identical signal channels corresponding to different component carriers Let the length of the control channel use the same search space. The second determining unit 7112 is configured to determine corresponding search spaces for at least two control channels of the same signaling length according to the signaling length of the control channel corresponding to the component carrier, so that at least two control channels of the same signaling length corresponding to the same component carrier The control channels use the same search space.

The second search space determining module 721 includes: a third determining unit 7211 or a fourth determining unit 7212 .

Wherein, the third determining unit 7211 is configured to determine corresponding search spaces for at least two control channels of different signaling lengths corresponding to different component carriers, so that the at least two different signaling lengths in at least one time transmission unit Control channels of different lengths use different search spaces. The fourth determining unit 7212 is configured to determine corresponding search spaces for at least two control channels of different signaling lengths corresponding to the same component carrier, so that the at least two control channels of different signaling lengths in at least one time transmission unit Control channels use different search spaces.

The first search space determining module 711 and/or the second search space determining module 721 may further include: a position determining unit 73 and/or an initial search space unit 74 .

Wherein, the position determination unit 73 is configured to determine the initial position and size of the search space corresponding to the control channel. The initial search space unit 74 is configured to determine a search space corresponding to the control channel of the signaling length according to the initial search space corresponding to the control channel of the signaling length. For details, reference may be made to the related descriptions of Embodiments 1 and 2 of the present invention.

Further, the location determination unit 73 includes:

The start position determination subunit 731 is configured to determine the start position of the search space corresponding to the control channel according to the signaling length identifier or the signaling length group identifier; or according to the signaling length identifier or the signaling length group identifier, and Any one or more of user equipment identifier, control channel format identifier, space division, component carrier identifier corresponding to the control channel, subframe sequence number or aggregation level determines the start position of the search space corresponding to the control channel.

The initial search space unit 74 includes: a first initial search space subunit 741 , a second initial search space subunit 742 or a third initial search space subunit 743 , and also includes a fourth initial search space subunit 744 .

The first initial search space subunit 741 is configured to determine the initial search space corresponding to each component carrier, wherein the initial search space corresponding to the control channel of each signaling length corresponding to the same component carrier is the initial search space of the same component carrier space.

The second initial search space subunit 742 is configured to determine the initial search space corresponding to the control channel of each signaling length corresponding to each component carrier; if there are at least two identical signal lengths in the signaling length corresponding to the same component carrier signaling length, then make the at least two control channels with the same signaling length use the same initial search space; and/or if there are at least two different signaling lengths in the signaling lengths corresponding to the same component carrier, then The at least two control channels with different signaling lengths use different initial search spaces in at least one time transmission unit.

The third initial search space subunit 743 is configured to determine the initial search space corresponding to each component carrier group after grouping the component carriers, wherein the initial search space corresponding to the control channels of each signaling length corresponding to the same component carrier group The space is the initial search space of the same component carrier group; and

The fourth initial search space subunit 744 is configured to: if a signaling length of a control channel corresponding to a component carrier is different from a signaling length of a control channel corresponding to other one or more component carriers, the The search space corresponding to the control channel is completely the same or partly the same as the initial search space corresponding to the control channel of the one signaling length; The control channels corresponding to the component carriers have the same signaling length, and the search space corresponding to the control channel of the one signaling length is the initial search space corresponding to the control channel of the one signaling length corresponding to the component carrier and All or part of the search space formed by the initial search space corresponding to the control channel of one signaling length corresponding to the other one or more component carriers.

Further, after the first search space determination module 711 determines the search space corresponding to the control channel according to the signaling length, the first detection module 712 is further configured to: in the determined same search space, search The control channel of the signaling length included in the space is blindly detected. After the second search space determination module determines the search space corresponding to the control channel according to the signaling length, the second detection module is further configured to: in the determined different search spaces, perform The length of the control channel is blindly detected.

In addition, when the search space includes a priority detection search space, if there is a control channel with a certain signaling length in the priority detection search space, the first detection module 712 and/or the second detection module 722 detects whether the extended detection search space There is a control channel with a non-determined signaling length; if there is no control channel with a definite signaling length in the search space for priority detection, the first detection module 712 and/or the second detection module 722 does not detect the search space for extended detection Whether there is a control channel of non-deterministic signaling length.

The receiving device in this embodiment may be a UE. For the same aggregation level in this embodiment, the receiving device can determine the search space according to the signaling length of the control channel, and for the specific method of detecting the control channel in the search space, refer to the relevant description in Embodiment 1 of the present invention.

In this embodiment, the receiving device provided can determine a search space according to the signaling length of the control channel for the same aggregation level, so as to detect the control channel of the signaling length in the search space. In addition, since the search spaces corresponding to component carriers with the same signaling length of the corresponding control channels may overlap or partially overlap, the number of times of blind detection by the UE may be reduced. In addition, the UE preferentially detects the search space corresponding to the control channel of the determined signaling length, which can further reduce the number of times of blind detection.

Finally, it should be noted that those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing related hardware through computer programs, and the programs can be stored in a computer-readable In the storage medium, when the program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM) and the like.

Each functional unit in the embodiment of the present invention may be integrated into one processing module, or each unit may physically exist separately, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

The above specific embodiments are not intended to limit the present invention. For those of ordinary skill in the art, any modifications, equivalent replacements, improvements, etc. made without departing from the principle of the present invention shall be included in the present invention. within the scope of protection.

Claims (20)

1. A method for controlling channel mapping, comprising: For the same aggregation level, the network device determines at least two control channels with the same signaling length and at least two control channels with different signaling lengths; According to the signaling length of the control channel corresponding to the component carrier, the network device determines a first search space for the at least two control channels with the same signaling length, wherein the at least two control channels with the same signaling length The first search space used is the same; In at least one time transmission unit, according to the signaling length of the control channel corresponding to the component carrier, the network device determines corresponding second search spaces for the at least two control channels with different signaling lengths, wherein, in The second search spaces used by the at least two control channels with different signaling lengths in at least one time transmission unit are different; The network device maps the at least two control channels with the same signaling length to a first search space, and maps the at least two control channels with different signaling lengths to corresponding second search spaces; The search space is a user equipment-specific search space. 2. The method according to claim 1, characterized in that: The at least two control channels having the same signaling length correspond to different component carriers; The at least two control channels with different signaling lengths correspond to different component carriers. 3. The method according to claim 1 or 2, wherein said determining the first search space comprises: The first search space is determined according to the initial search spaces of the at least two control channels with the same signaling length. 4. The method according to claim 1 or 2, wherein said determining the corresponding second search space respectively comprises: The corresponding second search spaces are respectively determined according to the initial search spaces of the at least two control channels with different signaling lengths. 5. The method according to claim 3, wherein the first search space is all or part of the search space formed by the initial search spaces of the at least two control channels with the same signaling length. 6. A method for controlling channel detection, comprising: For the same aggregation level, the user equipment determines at least two control channels with the same signaling length and at least two control channels with different signaling lengths; According to the signaling length of the control channel corresponding to the component carrier, the user equipment determines a first search space for the at least two control channels with the same signaling length, wherein the at least two control channels with the same signaling length The first search space used is the same; In at least one time transmission unit, according to the signaling length of the control channel corresponding to the component carrier, the user equipment respectively determines corresponding second search spaces for the at least two control channels with different signaling lengths, wherein, in The second search spaces used by the at least two control channels with different signaling lengths in at least one time transmission unit are different; The user equipment detects the at least two control channels with the same signaling length in the first search space, and respectively detects the at least two control channels with different signaling lengths in the corresponding second search space; The search space is a user equipment-specific search space. 7. The method according to claim 6, characterized in that: The at least two control channels having the same signaling length correspond to different component carriers; The at least two control channels with different signaling lengths correspond to different component carriers. 8. The method according to claim 6 or 7, wherein said determining the first search space comprises: The first search space is determined according to the initial search spaces of the at least two control channels with the same signaling length. 9. The method according to claim 6 or 7, wherein said determining the corresponding second search space respectively comprises: The corresponding second search spaces are respectively determined according to the initial search spaces of the at least two control channels with different signaling lengths. 10. The method according to claim 8, wherein the first search space is all or part of the search space formed by the initial search spaces of the at least two control channels with the same signaling length. 11. A transmitting device, comprising: a first processing module and a second processing module, wherein, The first processing module includes: a first search space determining module, configured to, for the same aggregation level, determine at least two control channels with the same signaling length according to the signaling length of the control channel corresponding to the component carrier, and for the at least Two control channels with the same signaling length determine a first search space, wherein the first search spaces used by the at least two control channels of the same signaling length are the same; and a first mapping module is configured to map the at least two control channels with the same signaling length are mapped to the first search space; The second processing module includes: a second search space determining module, configured to, for the same aggregation level, determine at least two control channels with different signaling lengths according to the signaling length of the control channel corresponding to the component carrier, and at least one time In the transmission unit, corresponding second search spaces are respectively determined for the at least two control channels with different signaling lengths, wherein in at least one time transmission unit, the at least two control channels with different signaling lengths use The second search spaces are different; and a second mapping module, configured to map the at least two control channels with different signaling lengths to corresponding second search spaces; The search space is a user equipment-specific search space. 12. The apparatus of claim 11, wherein: The at least two control channels having the same signaling length correspond to different component carriers; The at least two control channels with different signaling lengths correspond to different component carriers. 13. The device according to claim 11 or 12, wherein the first processing module is used for: For the same aggregation level, at least two control channels with the same signaling length are determined, and according to the initial search space of the at least two control channels with the same signaling length, the at least two control channels with the same signaling length The control channel defines the first search space. 14. The device according to claim 11 or 12, wherein the second processing module is used for: For the same aggregation level, at least two control channels with different signaling lengths are determined, and in at least one time transmission unit, according to the initial search spaces of the at least two control channels with different signaling lengths, for the at least Two control channels with different signaling lengths respectively determine corresponding second search spaces. 15. The device according to claim 13, wherein the first processing module is used for: For the same aggregation level, at least two control channels with the same signaling length are determined, and the first search space is determined as all or part of the search space formed by the initial search spaces of the at least two control channels with the same signaling length . 16. A receiving device, characterized by comprising: a first processing module and a second processing module, wherein, The first processing module includes: a first search space determining module, configured to, for the same aggregation level, determine at least two control channels with the same signaling length according to the signaling length of the control channel corresponding to the component carrier, and for the at least Two control channels with the same signaling length determine a first search space, wherein the at least two control channels with the same signaling length use the same first search space; and the first detection module is configured to perform the first search spatially detecting said at least two control channels having the same signaling length; The second processing module includes: a second search space determining module, configured to, for the same aggregation level, determine at least two control channels with different signaling lengths according to the signaling length of the control channel corresponding to the component carrier, and at least one time In the transmission unit, corresponding second search spaces are respectively determined for the at least two control channels with different signaling lengths, wherein in at least one time transmission unit, the at least two control channels with different signaling lengths use The second search spaces are different; and the second detection module is used to respectively detect the at least two control channels with different signaling lengths in the corresponding second search spaces; The search space is a user equipment-specific search space. 17. The apparatus of claim 16, wherein: The at least two control channels having the same signaling length correspond to different component carriers; The at least two control channels with different signaling lengths correspond to different component carriers. 18. The device according to claim 16 or 17, wherein the first processing module is used for: For the same aggregation level, at least two control channels with the same signaling length are determined, and according to the initial search space of the at least two control channels with the same signaling length, the at least two control channels with the same signaling length The control channel defines the first search space. 19. The device according to claim 16 or 17, wherein the second processing module is used for: For the same aggregation level, at least two control channels with different signaling lengths are determined, and in at least one time transmission unit, according to the initial search spaces of the at least two control channels with different signaling lengths, for the at least Two control channels with different signaling lengths respectively determine corresponding second search spaces. 20. The device according to claim 18, wherein the first processing module is used for: For the same aggregation level, at least two control channels with the same signaling length are determined, and the first search space is determined as all or part of the search space formed by the initial search spaces of the at least two control channels with the same signaling length .