Transmission method and device

Abstract

The embodiment of the present application provides a transmission method and device, the method comprising: determining a second identifier according to a first identifier for indicating a resource of downlink control information, wherein the second identifier is an identifier of a high-layer configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the downlink control information. By determining a second identifier of a CORSET Pool Index corresponding to the HARQ codebook according to the first identifier of the resource indicating the downlink control information, the HARQ codebook can be generated according to the second identifier, thereby avoiding the problem that the PDSCH cannot determine which CORSET PoolIndex CORESET should be used to generate the HARQ codebook when feeding back.

Description

Technical Field

[0001] The present application relates to communication technology, and in particular to a transmission method and device. Background Art

[0002] In the new radio (NR), coverage enhancement can be effectively improved by repeatedly transmitting channels.

[0003] Currently, in R16, the repeated transmission of the physical downlink shared channel (PDSCH) based on multi transmission and reception point (Multi-TRP) is scheduled by only one physical downlink control channel (PDCCH), and the PDCCH corresponds to only one high-level configuration (CORSET Pool Index). Although the repeated transmission of PDSCH may be transmitted by multiple TRPs, because there is only one CORSET Pool Index for the PDCCH that schedules PDSCH, the PDSCH will generate the HARQ codebook for hybrid automatic repeat request (HARQ) feedback according to the control resource set (CORESET) where the PDCCH is located when feeding back.

[0004] However, in Rel-17, PDCCH can be repeatedly transmitted by multiple CORESETs with different CORSET Pool Indexes. In this case, PDSCH cannot determine which CORESET with which CORSET Pool Index should be used to generate the HARQ codebook during feedback. Summary of the invention

[0005] The embodiments of the present application provide a transmission method and apparatus to avoid the problem that when PDSCH is fed back, it is impossible to determine according to which CORESET Pool Index the HARQ codebook should be generated.

[0006] In a first aspect, an embodiment of the present application provides a transmission method, including:

[0007] A second identifier is determined according to a first identifier of a resource indicating downlink control information (DCI), wherein the second identifier is an identifier of a high-layer configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the DCI.

[0008] In a second aspect, an embodiment of the present application provides a transmission method, including:

[0009] A second identifier is determined according to a first identifier used to indicate a resource of the DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the DCI.

[0010] In a third aspect, an embodiment of the present application provides a transmission device, including:

[0011] A determination module is used to determine a second identifier according to a first identifier used to indicate a resource of the DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to the HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of the PDSCH corresponding to the DCI.

[0012] In a fourth aspect, an embodiment of the present application provides a transmission device, including:

[0013] A determination module is used to determine a second identifier according to a first identifier used to indicate a resource of the DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to the HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of the PDSCH corresponding to the DCI.

[0014] In a fifth aspect, an embodiment of the present application provides a terminal device, including: a transceiver, a processor, and a memory;

[0015] The memory stores computer-executable instructions;

[0016] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the transmission method as described in the first aspect above.

[0017] In a sixth aspect, an embodiment of the present application provides a network device, including: a transceiver, a processor, and a memory;

[0018] The memory stores computer-executable instructions;

[0019] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the transmission method as described in the second aspect above.

[0020] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the transmission method described in the first aspect above.

[0021] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-readable storage medium is stored computer execution instructions, which, when executed by a processor, are used to implement the transmission method as described in the second aspect above.

[0022] The embodiment of the present application provides a transmission method and device, the method comprising: determining a second identifier according to a first identifier for indicating a resource of a DCI, wherein the second identifier is an identifier of a high-level configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the DCI. By determining a second identifier of a CORSET Pool Index corresponding to the HARQ codebook according to the first identifier of the resource indicating the DCI, the HARQ codebook can be generated according to the second identifier, thereby avoiding the problem that the PDSCH cannot determine which CORSET Pool Index CORESET should be used to generate the HARQ codebook when feeding back. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a communication scenario provided in an embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the layout of the terminal device and the TRP provided in the embodiment of the present application;

[0025] Figure 3 A possible implementation diagram of REG provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of a CCE provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of search spaces at different aggregation levels provided in an embodiment of the present application;

[0028] Figure 6 The process of the transmission method provided in the embodiment of the present application Figure 1 ;

[0029] Figure 7 A schematic diagram of implementing the first identifier indicated by the PDCCH provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of implementing the semi-static configuration of the first identifier by high-level signaling provided in an embodiment of the present application;

[0031] Fig. 9 A schematic diagram of a second PDCCH provided in an embodiment of the present application;

[0032] Fig.10 A schematic diagram of determining a first identifier for a second PDCCH provided in an embodiment of the present application;

[0033] Fig.11 A schematic diagram of determining a first identifier when multiple second PDCCHs are provided in an embodiment of the present application;

[0034] Fig.12 A schematic diagram of determining a first identifier when multiple third PDCCHs are provided in an embodiment of the present application;

[0035] Fig.13 A schematic diagram of determining a first identifier for a fourth PDCCH provided in an embodiment of the present application;

[0036] Fig.14 A schematic diagram of determining a first identifier when multiple fourth PDCCHs are provided in an embodiment of the present application;

[0037] Fig.15 A schematic diagram of determining a first identifier according to an identifier of a second CORESET provided in an embodiment of the present application;

[0038] Fig.16 A schematic diagram of the structure of the transmission device provided in the embodiment of the present application Figure 1 ;

[0039] Fig.17 A schematic diagram of the structure of the transmission device provided in the embodiment of the present application Figure 2 ;

[0040] Fig.18 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0041] Fig.19 A schematic diagram of the structure of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] To facilitate understanding, the concepts involved in this application are first explained.

[0043] 3GPP: 3rd Generation Partnership, third generation partnership project.

[0044] Terminal equipment: It can be a device that includes wireless transceiver functions and can cooperate with network equipment to provide communication services to users. Specifically, terminal equipment can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device. For example, the terminal equipment can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a network after 5G, etc.

[0045] Network equipment: A network equipment may be a device used to communicate with a terminal device, for example, it may be a base station (Base Transceiver Station, BTS) in a Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) communication system, or a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or the network equipment may be a relay station, an access point, an in-vehicle device, a wearable device, a network-side device in a future 5G network or a network after 5G, or a network device in a future evolved public land mobile network (PLMN) network, etc.

[0046] The network devices involved in the embodiments of the present application may also be referred to as radio access network (RAN) devices. The RAN device is connected to the terminal device, and is used to receive data from the terminal device and send it to the core network device. The RAN device corresponds to different devices in different communication systems, for example, in the 2G system, it corresponds to the base station and the base station controller, in the 3G system, it corresponds to the base station and the radio network controller (Radio Network Controller, RNC), in the 4G system, it corresponds to the evolutionary base station (Evolutional Node B, eNB), and in the 5G system, it corresponds to the 5G system, such as the access network equipment in NR (e.g., gNB, centralized unit CU, distributed unit DU).

[0047] Search space: In the LTE system, the search space is defined as a series of control channel element (CCE) resources that need to be blindly detected for each aggregation level, including the starting position of the CCE and the number of candidate resources.

[0048] Control Resource Set (CORESET): It is a type of time-frequency resource set introduced in NR. UE detects PDCCH in the corresponding control resource set. The control resource set consists of a set of resource element groups (REG).

[0049] Control channel element: A control channel element (CCE) is a time-frequency resource that includes at least one candidate control channel and occupies the smallest number of resources in the frequency domain and the time domain. The number of resources in the time domain includes the number of consecutive symbols in the time domain; the number of resources in the frequency domain includes the number of consecutive subcarriers in the frequency domain. A control channel element is also called a control channel resource element, or an enhanced control channel element (eCCE), or in 5G, a new radio control channel element (NR-CCE). The frequency domain resource elements included in each control channel element in the frequency domain can be mapped continuously or discretely in the frequency domain, and the mapping method of the frequency domain resource elements in the time domain is not limited.

[0050] In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order, nor can they be understood as indicating or implying an association relationship between similar nouns.

[0051] Next, combine Figure 1 , the scenarios to which the communication method in this application is applicable are described.

[0052] Figure 1 A schematic diagram of a communication scenario provided in an embodiment of the present application. Figure 1 , including a network device 101 and a terminal device 102, and wireless communication can be performed between the network device 101 and the terminal device 102.

[0053] The network including the network device 101 and the terminal device 102 may also be referred to as a non-terrestrial communication network (NTN), wherein NTN refers to a communication network between a terminal device and a satellite (also referred to as a network device).

[0054] It can be understood that the technical solution of the embodiment of the present application can be applied to the new radio (NR) communication technology, NR refers to the new generation of wireless access network technology, which can be applied to the future evolution network, such as the future fifth generation mobile communication (5G) system. The solution in the embodiment of the present application can also be applied to other wireless communication networks such as Wireless Fidelity (WIFI) and Long Term Evolution (LTE), and the corresponding names can also be replaced by the names of corresponding functions in other wireless communication networks.

[0055] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0056] At present, the research and development work for the fifth generation mobile communication system (5G) has entered a new stage worldwide. 3Gpp (3rd Generation Partnership Project) has basically identified three major scenarios for 5G: enhanced mobile broadband (eMBB), massive MTC, and ultra-relaible and low latency communication.

[0057] From the spectrum planned by 3GPP 5G, a large part of the spectrum is as high as 30GHz, 70GHz or even 100GHz. Such high spectrum is very suitable for using multi-antenna technology to improve coverage and capacity. Therefore, Massive MIMO (Multiple-Input Multiple-Output) is undoubtedly one of the important means to improve 5G spectrum efficiency. In the 3GPP meeting, beamforming has been discussed as an important technical feature of 5G.

[0058] However, in the case of higher spectrum, due to the limited coverage of a network node (such as a base station), if the traditional cell definition is followed, the cell coverage radius will be very small. Therefore, the concept of TRP (Transmission Reception Point) is generally introduced in 5G. TRP is equivalent to a traditional base station, but in some cases, a cell may be covered by more than one TRP, but by multiple TRPs, thereby increasing the coverage radius of the cell and greatly reducing the continuous switching of terminal devices in the cell.

[0059] Combine the following Figure 2 Explain TRP. Figure 2 It is a layout diagram of the terminal device and TRP provided in an embodiment of the present application.

[0060] like Figure 2 As shown in the figure, there are two TRPs marked as TRP1 and TRP2, where each TRP can correspond to multiple beam paths, and the TRPs can communicate with each other. The communication between TRPs can be through wired connection or wireless connection. In some cases, if the two TRPs are far apart, it can also be completed through relay, which is determined according to the actual deployment scenario.

[0061] In a possible implementation, TRP1 can be used as a service TRP (equivalent to a base station) for sending channels to terminal devices, and TRP2 can also be used as a service TRP (equivalent to a base station) for sending channels to terminal devices.

[0062] Based on the communication scenarios described above, the relevant technical background of this application is described below:

[0063] The network device configures the control resource set (CORESET) and the search space (Search Space) for the transmission of PDCCH. The following describes the related concepts such as the resource element group (REG), control channel element (CCE), search space, CORESET, etc. involved in this application:

[0064] In order to effectively configure the time and frequency resources of PDCCH, two dedicated control channel resource units are defined in NR: REG and CCE.

[0065] Among them, one REG is composed of 4 or 6 adjacent resource elements (Resource Element) RE located on the same OFDM symbol, but the number of available REs is only 4. The REG composed of 6 REs contains two reference signals (reference signals, RS), and the RE occupied by RS cannot be used by the REG of PDCCH.

[0066] Combine the following Figure 3 A possible implementation of REG is described below. Figure 3 A possible implementation diagram of REG provided in the embodiment of the present application is as follows: Figure 3 As shown:

[0067] Because PDCCH can occupy the first three OFDM symbols of each subframe in the time domain, REG can be located in the first three OFDM symbols. Figure 3 In the above, the same shade and color are the same as one REG. Figure 3 It can be seen that Figure 3 There are a total of 8 REGs in the symbol, among which symbol 0 includes 2 REGs, symbol 1 includes 3 REGs, and symbol 2 includes 3 REGs.

[0068] Based on the REG introduced above, the following Figure 4 Explain CCE. Figure 4 A schematic diagram of a CCE provided in an embodiment of the present application is shown in FIG. Figure 4 As shown:

[0069] One CCE includes 9 REGs, and thus one CCE includes 36 REs. A CCE is a time-frequency resource that includes at least one candidate control channel and occupies the smallest number of resources in the frequency domain and the time domain.

[0070] Based on the above introduction, the PDCCH search space is described below:

[0071] Since PDCCH is an instruction sent by the network device, the terminal device has not received any other information except some system information before. Therefore, the terminal device does not know the number and location of CCE occupied by PDCCH. Therefore, the terminal device needs to try the possible time-frequency resource location and aggregation level of PDCCH through blind detection to receive PDCCH. In order to improve the efficiency of blind detection, the PDCCH search space is introduced.

[0072] Specifically, the PDCCH monitoring of the NR terminal device is performed in the PDCCH search space. The network device can configure up to 10 PDCCH search spaces for the terminal device, where the PDCCH search space can be notified to the terminal device by the network device through RRC signaling. The configuration information of the search space may include the information in the following Table 1:

[0073] Table 1

[0074]

[0075] Among them, each PDCCH search space configured by the network device for the terminal device corresponds to its own configuration information.

[0076] In the embodiment of the present application, the search space is a logical resource defined according to CCE, which is a set of PDCCHs that need to be detected, wherein the search space is a set of candidate PDCCHs at one or more aggregation levels. The aggregation level of the PDCCH actually sent by the network device can vary over time. Since there is no relevant signaling to inform the terminal device, the terminal device needs to blindly detect the PDCCH at different aggregation levels, wherein the PDCCH to be blindly detected is called a candidate PDCCH.

[0077] The terminal device decodes all candidate PDCCHs in the search space. If a cyclic redundancy check (CRC) passes, the content of the decoded PDCCH is considered valid for the current decoding terminal device, and the information obtained by decoding is used for subsequent operations.

[0078] In one possible implementation, the PDCCH search space may include multiple candidate PDCCHs with the same aggregation level, where a candidate PDCCH is composed of L CCEs, L is called the aggregation level of the candidate PDCCH, where L is an integer greater than or equal to 1, or the value of L belongs to the set {1, 2, 4, 8, 16} or {4, 8, 16} or {1, 2, 4, 8, 16, 32}.

[0079] The numbers of the L CCEs included in a candidate PDCCH are continuous, wherein the starting CCE represents the CCE with the smallest index among the L CCEs. A set of multiple candidate PDCCHs is also called a search space set, and the candidate PDCCHs with the same number of CCEs included in the search space set can be grouped into one group, and each group of candidate PDCCHs can constitute a search space, and the number of CCEs included in the candidate PDCCHs in each group is defined as the aggregation level (AL) of the search space.

[0080] Combine the following Figure 5 The search space of different aggregation levels is explained. Figure 5 A schematic diagram of search spaces at different aggregation levels provided in an embodiment of the present application, such as Figure 5 As shown:

[0081] The search space of AL=1 includes multiple candidate PDCCHs, wherein each candidate PDCCH includes 1 CCE, that is, the aggregation level of each candidate PDCCH is 1;

[0082] The search space of AL=2 includes multiple candidate PDCCHs, wherein each candidate PDCCH includes 2 CCEs, that is, the aggregation level of each candidate PDCCH is 2;

[0083] The search space of AL=4 includes multiple candidate PDCCHs, wherein each candidate PDCCH includes 4 CCEs, that is, the aggregation level of each candidate PDCCH is 4;

[0084] The search space of AL=8 includes multiple candidate PDCCHs, wherein each candidate PDCCH includes 8 CCEs, that is, the aggregation level of each candidate PDCCH is 8.

[0085] Based on the content of the search space introduced above, it can be determined that the network device can configure multiple search spaces for the terminal device. In NR, in each downlink bandwidth part (Bandwidth Part, BWP) of each service cell, the network device can configure up to 10 search space sets for the terminal device. The search space set is configured with time domain configuration information to indicate the time domain position of the user to detect the PDCCH. At the same time, the network device configures a set-associated CORESET ID for each search space set. Through the CORESET ID, the user can obtain the physical resources of the search space set in the frequency domain. Each search space set has a uniquely associated CORESET ID. Different search space sets can be associated with the same CORESET ID.

[0086] The terminal device determines the time-frequency domain position of the candidate PDCCH according to the time domain given by the search space set and the frequency domain of the associated CORESET ID and other parameters in the search space set.

[0087] In the actual implementation process, the configuration information of each search space may be different from each other. The specific configuration information of each search space may be determined according to the actual situation and will not be repeated here.

[0088] The following is an introduction to CORESET:

[0089] In the LTE system, PDCCH occupies the entire frequency band in the frequency domain and the first 1-3 OFDM symbols of each subframe in the time domain. In other words, the network equipment only needs to inform the terminal equipment of the number of OFDM symbols occupied by PDCCH, and the terminal equipment can determine the search space of PDCCH.

[0090] In the NR system, due to the large bandwidth of the system, if the PDCCH still occupies the entire bandwidth, it will not only waste resources but also increase the complexity of blind detection.

[0091] Therefore, the concept of CORESET is introduced in the NR system. CORESET is used to define a set of time-frequency resources that carry control information. The terminal device detects the PDCCH channel in the set of time-frequency resources to obtain scheduling information.

[0092] Among them, the control resource set includes multiple physical resource blocks in the frequency domain and 1 to 3 OFDM symbols in the time domain, and can be located at any position in the time slot. The configuration information of CORESET may include, for example, information on frequency domain resources, information on time domain resources, time length information, etc. The time domain resources occupied by CORESET are semi-statically configured by high-level parameters.

[0093] In addition, when configuring a CORESET, the network device configures one or a group of transmission configuration indication (TCI) states for each CORESET. The TCI state is used to indicate the channel filter coefficient corresponding to the terminal device when demodulating and detecting the candidate PDCCH of the Search Space associated with the CORESET. When the network device configures a group of TCI states for a CORESET, the network device activates a unique TCI state for the CORESET through media access control (MAC) control element (CE) signaling, which is used to indicate the channel filter coefficient of the terminal device when demodulating the PDCCH.

[0094] In addition, the network device also configures a CORSETPool Index for each CORESET to indicate whether it is the same TRP. For CORESETs with the same configured CORSET Pool Index, the terminal device can determine that this is data from the same TRP.

[0095] In a possible implementation, the value range of CORSET Pool Index may be 0 and 1. The meaning of CORSET Pool Index is exemplarily introduced below in conjunction with Table 2.

[0096] Table 2:

[0097]

[0098] Referring to Table 2 above, assuming that the current network device configures search space 1, search space 2, and search space 3 for the terminal device, where search space 1 is associated with CORESET1, search space 2 is associated with CORESET2, and search space 3 is associated with CORESET3. Assuming that the CORSET Pool Index of CORESET1 and CORESET3 is 0, it can be determined that the TRPs corresponding to CORESET1 and CORESET3 are the same (TRP0), and the CORSET Pool Index of CORESET2 is 1, it can be determined that the TRP corresponding to CORESET2 is different from the TRPs corresponding to CORESET1 and CORESET3 (TRP1).

[0099] Based on the introduction in Table 2 above, a person skilled in the art can determine that CORSET Pool Index can indicate the TRP corresponding to CORESET. In other words, CORSET Pool Index can indicate which TRP sends the channel information on the corresponding search space. The above introduction is an implementation method in which the value range of CORSET Pool Index is 0 and 1, which can indicate two different TRPs accordingly.

[0100] In other possible implementations, the value range of CORSET Pool Index can also be, for example, 0, 1, 2, which can correspondingly indicate three different TRPs. The value range of CORSET Pool Index and the TRP it indicates can be selected according to actual needs, and this embodiment does not specifically limit this.

[0101] Since this application involves the generation of a HARQ codebook, the HARQ mechanism is briefly introduced as follows:

[0102] For terminal devices with downlink services, the network device can schedule the transmission of PDSCH for the terminal device through the downlink authorization DCI, wherein the downlink authorization DCI can be carried in the PDCCH, and the downlink authorization DCI includes indication information of the physical uplink control channel (PUCCH) resources. After receiving the PDSCH, the terminal device can determine the decoding result of the PDSCH (acknowledgement (ACK) or negative acknowledgement (NACK) information) and feed back the decoding result to the network device through the PUCCH resource.

[0103] Among them, the HARQ mechanism is the retransmission mechanism of the MAC layer, and the HARQ mechanism can be used to retransmit data that is lost or erroneously transmitted. The HARQ process includes an uplink HARQ process and a downlink HARQ process, and the uplink HARQ process and the downlink HARQ process are independent of each other. For terminal devices that do not support downlink spatial division multiplexing, each downlink HARQ process processes 1 transport block (TB) at the same time; for terminal devices that support downlink spatial division multiplexing, each downlink HARQ process can process 1 or 2 TBs at the same time. Each uplink HARQ process of the terminal device processes 1 TB at the same time. In the time domain, it can be divided into synchronous HARQ and asynchronous HARQ. The retransmission of asynchronous HARQ can occur at any time, and the time interval between the retransmission of the same TB and the previous single transmission is not fixed. In the frequency domain, it can be divided into non-adaptive HARQ and adaptive HARQ. Adaptive HARQ can change the frequency domain resources and modulation and coding scheme (MCS) used for retransmission.

[0104] In NR, asynchronous HARQ is used for both uplink and downlink, and HARQ-ACK information or HARQ-NACK information can be carried on PUCCH or physical uplink shared channel (PUSCH).

[0105] Taking HARQ-ACK information as an example, if the terminal device transmits HARQ-ACK information on PUCCH, the terminal device first determines the PUCCH resource set (PUCCH resource set) according to the number of bits of the HARQ-ACK information, and then determines the PUCCH resource for transmitting the HARQ-ACK information according to the PUCCH resource indicator (PUCCH resource indicator) indicated in the PDCCH.

[0106] Currently, in R16, the repeated transmission of PDSCH based on multi-transmission and reception point (Multi-TRP) is scheduled by only one PDCCH, and the PDCCH corresponds to only one CORSET Pool Index. Although the repeated transmission of PDSCH may be transmitted by multiple TRPs, because the PDCCH that schedules PDSCH has a unique CORSET Pool Index, the PDSCH will generate the HARQ codebook according to the CORSET Pool Index corresponding to the CORESET where the PDCCH is located when it is fed back.

[0107] However, in Rel-17, PDCCH can be repeatedly transmitted by multiple CORESETs with different CORSET Pool Indexes. Assuming that the CORSET Pool Index of the CORESET corresponding to the current PDCCH is 1, it indicates that the PDCCH is sent by TRP1, and assuming that the CORSET Pool Index of the CORESET corresponding to the PDCCH repetition is 0, it indicates that the PDCCHrepetition is sent by TRP0, wherein PDCCH and PDCCH repetition indicate the same PDSCH. When the terminal device receives the PDSCH, it cannot determine who sent the current PDSCH. When the terminal device performs PDSCH feedback, it cannot determine which CORSET Pool Index CORESET should be used to generate the HARQ codebook.

[0108] Based on the problems in the prior art, this application proposes the following technical ideas:

[0109] The terminal device may be instructed by dynamic indication, semi-static configuration or preset rules to generate the HARQ codebook according to the CORESET of which CORSET Pool Index when performing PDSCH feedback.

[0110] The transmission method provided by the present application is introduced below in conjunction with specific embodiments. Figure 6 To explain, Figure 6 The process of the transmission method provided in the embodiment of the present application Figure 1 .

[0111] like Figure 6 As shown, the method includes:

[0112] S601. Determine a second identifier according to a first identifier for indicating a resource of downlink control information, wherein the second identifier is an identifier of a high-layer configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the downlink control information.

[0113] In this embodiment, the first identifier is used to indicate the resource of the downlink control information. For example, the first identifier can be used to indicate the time domain resource, and / or frequency domain resource, and / or time-frequency resource of the downlink control information.

[0114] In a possible implementation manner, the first identifier includes at least one of the following: an identifier of a first CORESET, an identifier of a first high-level configuration (CORSET Pool Index), and an identifier of a first search space.

[0115] In another possible implementation, in a subsequent protocol, if a new first identifier for indicating a resource for downlink control information is specified, it can also be used to implement the technical solution of the present application. That is to say, as long as the first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH, the remaining possible implementations are selected accordingly according to the needs.

[0116] Based on the above content, it can be determined that the terminal device will monitor the PDCCH in the search space. When the terminal device detects the PDCCH and decodes it successfully, the terminal device can receive the PDCCH, and the corresponding terminal device can determine the identifier of the first search space;

[0117] At the same time, the configuration information of the search space includes the identifier of the CORESET associated therewith, so the terminal device can determine the identifier of the first CORESET according to the search space;

[0118] At the same time, the network device configures a CORSET Pool Index for each CORESET, and the terminal device can determine the identifier of the first CORSET Pool Index according to the identifier of the first CORESET.

[0119] In the actual implementation process, the first identifier may include at least one of the above-mentioned ones. The specific implementation can be selected according to actual needs, and this embodiment does not specifically limit this.

[0120] In this embodiment, a second identifier of a CORSET Pool Index corresponding to a HARQ codebook is determined according to the first identifier, wherein the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the downlink control information.

[0121] That is to say, in this embodiment, the terminal device detects and receives PDSCH according to the time-frequency resources indicated by the downlink control information. When performing HARQ feedback on the PDSCH, the second identifier of the CORSET PoolIndex corresponding to the HARQ codebook can be determined according to the first identifier. In combination with the above embodiments, those skilled in the art can determine that the CORSET Pool Index can indicate the TRP for sending channel information, that is, the second identifier of the CORSET Pool Index can be used to distinguish the HARQ codebook. The terminal device can determine which TRP to feed back the HARQ information to based on the second identifier, thereby generating a HARQ codebook.

[0122] The transmission method provided by the embodiment of the present application includes: determining a second identifier according to a first identifier for indicating a resource of downlink control information, wherein the second identifier is an identifier of a high-level configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the downlink control information. By determining a second identifier of a CORSET Pool Index corresponding to the HARQ codebook according to the first identifier of a resource indicating the downlink control information, the HARQ codebook can be generated according to the second identifier, thereby avoiding the problem that the PDSCH cannot determine which CORSET Pool Index CORESET should be used to generate the HARQ codebook when feeding back.

[0123] Based on the above embodiments, the transmission method provided by the present application also includes:

[0124] At least one repeatedly transmitted physical downlink control channel PDCCH is received from a network device, and a PDSCH is received according to time-frequency resources indicated by the at least one repeatedly transmitted PDCCH.

[0125] In this embodiment, before the terminal device receives the repeatedly transmitted PDCCH, the network device can configure a group of CORESETs to the terminal device to indicate the frequency domain resource set for transmitting the PDCCH, wherein each CORESET is configured with one or a group of TCI states; and the network device can also configure a group of Search Spaces to the terminal device to indicate the time domain resources and monitoring period of the candidate PDCCH and other related parameter configurations, wherein at any time, each CORESET will only have one activated TCI state.

[0126] And in this embodiment, the resource identifiers corresponding to the repeatedly transmitted PDCCHs are different, wherein the resource identifier includes at least one of the following: an identifier of the second control resource set CORESET, an identifier of the second high-level configuration, and an identifier of the second search space.

[0127] Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH belongs belongs.

[0128] For example, assuming that the resource identifier is the identifier of the second CORESET, that is, the identifiers of the second CORESET corresponding to each repeatedly transmitted PDCCH are different; for another example, assuming that the resource identifier is the identifier of the second CORSET Pool Index, that is, the identifiers of the second CORSET Pool Index corresponding to each repeatedly transmitted PDCCH are different.

[0129] The resource identifiers corresponding to the PDCCHs for repeated transmission are set to be different, for example, in the following two implementation methods:

[0130] In one possible implementation, the network device may configure M second CORESET identifiers for a certain Search Space, where M is an integer greater than or equal to 2, to associate the Search Space with the M CORESETs indicated by the M second CORESET identifiers, wherein the second CORSET Pool Index identifiers corresponding to the M second CORESET identifiers are different, to indicate that the PDCCH comes from M different TRPs.

[0131] Alternatively, in another possible implementation, the network device may configure a different second CORESET identifier for each of the M Search Spaces, where M is an integer greater than or equal to 2, to associate the M Search Spaces with the CORESETs indicated by different M second CORESET identifiers, and the network device further configures an identifier for the M Search Spaces, which is used to indicate that the PDCCHs sent in the M Search Spaces are each other's respective PDCCH repetitions according to a certain association relationship.

[0132] Then, the network device may respectively send the same repeatedly transmitted PDCCH to schedule the PDSCH according to the TCI states activated by the M CORESETs. Specifically, the network device sends the PDSCH on the time-frequency resources indicated by the PDCCH.

[0133] In addition, the terminal device sets the channel filter coefficient according to the TCI state activated by the M CORESETs, and receives the PDCCH on the corresponding time-frequency resources. After demodulating the received PDCCH, the terminal device can correctly demodulate one of the PDCCHs, or part of the PDCCHs, or all of the PDCCHs. In other words, the terminal device can receive one PDCCH in the repeatedly transmitted PDCCH, or the terminal device can also receive multiple PDCCHs in the repeatedly transmitted PDCCH. This embodiment does not limit this.

[0134] For the correctly demodulated PDCCH, the terminal device can receive and detect the PDSCH on the time-frequency resources indicated by the correctly demodulated PDCCH. It should be noted that because the present embodiment introduces the repeatedly transmitted PDCCH, the time-frequency resources indicated by each repeatedly transmitted PDCCH are the same. Correspondingly, the PDSCH received by the terminal device based on the repeatedly transmitted PDCCH is also the same.

[0135] Next, the terminal device needs to feedback HARQ-ACK information or HARQ-NACK information to TRP. However, in the present application, the second CORESET identifier and the second CORSET Pool Index identifier corresponding to each PDCCH of repeated transmission are different. Assuming that one PDCCH repetition is sent by TRP0 and the other PDCCH repetition is sent by TRP1, the terminal device needs to determine whether to feedback HARQ-ACK information or HARQ-NACK information to TRP0 or TRP1.

[0136] On the basis of the above embodiment, those skilled in the art can understand that the terminal device determines the second identifier according to the first identifier, thereby determining to which TRP to feedback the HARQ-ACK information or the HARQ-NACK information. In the possible implementation manner provided in the embodiment of the present application, the first identifier may be dynamically indicated; or the first identifier may be semi-dynamically statically configured; or the first identifier may be determined according to the first rule. Various possible implementation manners are described below in conjunction with specific embodiments:

[0137] In a possible implementation manner, the first identifier may be dynamically indicated.

[0138] For example, the first identifier may be dynamically indicated by downlink control information DCI in the PDCCH.

[0139] Alternatively, it may be indicated by the remaining indication information in the PDCCH, which is not limited in this embodiment.

[0140] Combine the following Figure 7 The implementation method of the DCI dynamic indication in the PDCCH is described. Figure 7 A schematic diagram of implementing the first identifier indicated by the PDCCH provided in the embodiment of the present application, such as Figure 7 As shown:

[0141] TRP0 sends PDCCH to the terminal device, and TRP1 also sends PDCCH to the terminal device, wherein the PDCCH sent by TRP0 and TRP1 is a repeatedly transmitted PDCCH, that is, the PDCCH transmitted by the two TRPs are the same, wherein the network device dynamically indicates in the PDCCH the first identifier corresponding to the PDSCH scheduled by the PDCCH.

[0142] For example, the first identifier indicated by the network device in the PDCCH is the identifier of the first CORESET (CORESET1), then the terminal device can obtain the first CORSET Pool Index identifier corresponding to CORESET1. Assuming that the first CORSET PoolIndex identifier is CORSET Pool Index 0, and CORSET Pool Index 0 corresponds to TRP0, the terminal device can determine that HARQ-ACK information or HARQ-NACK information should be fed back to TRP0.

[0143] That is to say, the terminal device can determine that the second identifier of the CORSETPool Index corresponding to the HARQ codebook is CORSET Pool Index 0 according to the identifier of the first CORESET, and the terminal device can generate the HARQ codebook according to CORSET PoolIndex 0.

[0144] For another example, the first identifier indicated by the network device in the PDCCH is the identifier of the first CORSET Pool Index (CORSET Pool Index 1), and CORSET Pool Index1 corresponds to TRP1, then the terminal device can determine that HARQ-ACK information or HARQ-NACK information should be fed back to TRP1.

[0145] That is to say, the terminal device may determine that the second identifier of the CORSET Pool Index corresponding to the HARQ codebook is CORSET Pool Index 1 based on the identifier of the first CORSET Pool Index, and the terminal device may generate the HARQ codebook based on CORSETPool Index 1.

[0146] For another example, the first identifier indicated by the network device in the PDCCH is the identifier of the first search space (search space 1), then the terminal device can obtain the identifier of the first CORESET associated with search space 1, assuming it is CORESET1, and the first CORSET Pool Index identifier corresponding to CORESET1 is CORSET Pool Index 0, and CORSET PoolIndex 0 corresponds to TRP0, then the terminal device can determine that HARQ-ACK information or HARQ-NACK information should be fed back to TRP0.

[0147] That is to say, the terminal device can determine that the second identifier of the CORSETPool Index corresponding to the HARQ codebook is CORSET Pool Index 0 according to the identifier of the first search space, and the terminal device can generate the HARQ codebook according to CORSET PoolIndex 0.

[0148] After generating the HARQ codebook, the terminal device can select the PUCCH resource set configured by the network device according to the number of bits in the HARQ codebook, and the terminal device selects the PUCCH resource in the PUCCH resource set according to the PUCCH resource indicator indicated in the PDCCH to transmit the corresponding HARQ codebook.

[0149] It should be noted that when the network device indicates the first identifier through PDCCH, the specific first identifier indicated depends on which TRP sends the PDSCH scheduled by the current PDCCH. That is to say, assuming that TRP0 and TRP1 send the same repeated PDCCH, both of which are used to schedule PDSCH1, where PDSCH1 is sent by TRP1, then the first identifier indicated by the PDCCH sent by the network device is the first identifier corresponding to TRP1, because when the terminal device receives PDSCH1, it is correct to feedback HARQ information to TRP0.

[0150] Therefore, the embodiment of the present application indicates the first identifier through PDCCH, and dynamic indication of the first identifier can be achieved. Assuming that the PDSCH scheduled by the PDCCH sent by the network device at moment 1 is sent by TRR0, and the PDSCH scheduled by the PDCCH sent by the network device at moment 2 is sent by TRR1 (not repeated transmission of PDCCH), the first identifiers indicated by these two PDCCHs are different, thereby achieving dynamic indication of the first identifier, so that the terminal device can quickly and efficiently determine the second identifier, thereby generating a second code book, so as to effectively implement HARQ feedback.

[0151] In another possible implementation manner, the first identifier may be semi-statically configured by high-layer signaling.

[0152] For example, the high-layer signaling may include first information, where the first information is used to determine the first identifier.

[0153] In one possible implementation, the first information is used to indicate whether the resource identifier of each PDCCH is the first identifier. For example, the first information can be 0 or 1, which is used to identify that the resource identifier is not the first identifier or is the first identifier, respectively; or, the first information can also be false or true, which is used to identify that the resource identifier is not the first identifier or is the first identifier, respectively.

[0154] Alternatively, the first information may be used to indicate which specific first identifier is, for example, the first identifier may be indicated as CORESET1, or the first identifier may be indicated as CORESET pool index1. This embodiment does not limit the implementation method of the semi-static configuration of the high-layer signaling.

[0155] Alternatively, the first information may also be used to indicate that the first identifier is a default identifier.

[0156] Combine the following Figure 8 The implementation method of semi-static configuration of high-level signaling is described. Figure 8 A schematic diagram of implementing the semi-static configuration of the first identifier by high-level signaling provided in an embodiment of the present application is shown in FIG. Figure 8 As shown:

[0157] The terminal device receives high-level signaling, wherein the high-level signaling is configured with a first identifier.

[0158] Among them, the meaning of semi-static configuration is that, according to the current configuration information, the current configuration is executed in a certain period or several periods of time thereafter. For example, if the terminal device receives high-level signaling at time 0, then in a period of time after time 0, the terminal device can determine the second identifier according to the first identifier indicated by the current high-level signaling to generate a HARQ code book.

[0159] The reason for the semi-static configuration is that, within a period of time after the current moment, a certain TRP sends PDSCH to the terminal device. Therefore, it can be determined that within a period of time after the current moment, the TRP that needs to feedback the HARQ codebook is the same. Therefore, the first identifier can be semi-statically configured through high-level signaling.

[0160] Alternatively, high-level signaling may be used to indicate that, starting from the current moment, any PDCCH that is repeatedly transmitted and sent by a certain CORESET shall be fed back to the TRP indicated by the first identifier.

[0161] In this embodiment, the first identifier includes at least one of the following: an identifier of a first control resource set CORESET, an identifier of a first high-level configuration, and an identifier of a first search space.

[0162] For example, the first identifier semi-statically configured by the network device through high-level signaling is the identifier of the first CORESET (CORESET1), then the terminal device can obtain the first CORSET Pool Index identifier corresponding to CORESET1. Assuming that the first CORSET Pool Index identifier is CORSET Pool Index 0, and CORSET Pool Index 0 corresponds to TRP0, the terminal device can determine that HARQ-ACK information or HARQ-NACK information should be fed back to TRP0.

[0163] That is to say, the terminal device can determine that the second identifier of the CORSETPool Index corresponding to the HARQ codebook is CORSET Pool Index 0 according to the identifier of the first CORESET, and the terminal device can generate the HARQ codebook according to CORSET PoolIndex 0.

[0164] For another example, the network device semi-statically configures the first identifier as the identifier of the first CORSET PoolIndex (CORSET Pool Index 1) through high-level signaling, and CORSET Pool Index1 corresponds to TRP1, then the terminal device can determine that HARQ-ACK information or HARQ-NACK information should be fed back to TRP1.

[0165] That is to say, the terminal device may determine that the second identifier of the CORSET Pool Index corresponding to the HARQ codebook is CORSET Pool Index 1 based on the identifier of the first CORSET Pool Index, and the terminal device may generate the HARQ codebook based on CORSETPool Index 1.

[0166] For another example, the first identifier semi-statically configured by the network device through high-level signaling is the identifier of the first search space (search space 1), then the terminal device can obtain the identifier of the first CORESET associated with search space 1, assuming it is CORESET1, and the first CORSET Pool Index identifier corresponding to CORESET1 is CORSET Pool Index 0, and CORSET Pool Index 0 corresponds to TRP0, then the terminal device can determine that HARQ-ACK information or HARQ-NACK information should be fed back to TRP0.

[0167] That is to say, the terminal device can determine that the second identifier of the CORSETPool Index corresponding to the HARQ codebook is CORSET Pool Index 0 according to the identifier of the first search space, and the terminal device can generate the HARQ codebook according to CORSET PoolIndex 0.

[0168] After generating the HARQ codebook, the terminal device can select the PUCCH resource set configured by the network device according to the number of bits in the HARQ codebook, and the terminal device selects the PUCCH resource in the PUCCH resource set according to the PUCCH resource indicator indicated in the PDCCH to transmit the corresponding HARQ codebook.

[0169] Therefore, the embodiment of the present application can realize the semi-static configuration of the first identifier by semi-statically configuring the first identifier through high-level signaling, and there is no need to send DCI for dynamic indication. Assuming that the PDSCH scheduled by the PDCCH sent by the network device at moment 1 is sent by TRR0, and the PDSCH scheduled by the PDCCH sent by the network device at moment 2 is also sent by TRR0, then the first identifiers corresponding to these two PDSCHs can be semi-statically configured through high-level signaling to be the same, thereby eliminating the need for dynamic configuration, effectively saving system resources, and enabling the terminal device to effectively determine the second identifier, thereby generating a second codebook, so as to effectively realize HARQ feedback.

[0170] In yet another possible implementation, the first identifier may be determined according to a first rule.

[0171] Among them, the first rule may, for example, be determining the first identifier according to the time information corresponding to each PDCCH of repeated transmission, and the transmission method provided in the embodiment of the present application further includes:

[0172] Receiving a first PDCCH, wherein the first PDCCH is received first among the repeatedly transmitted PDCCHs;

[0173] According to the first PDCCH, time information of each repeatedly transmitted PDCCH is acquired, wherein the time information includes at least one of the following: a start transmission time position, an end transmission time position, and a corresponding symbol when the transmission ends.

[0174] That is to say, the terminal device currently receives the first PDCCH, wherein the first PDCCH is the first one received by the terminal device among the repeatedly transmitted PDCCHs. Then, the terminal device can obtain the time information of each repeatedly transmitted PDCCH configured by the network device according to the first PDCCH, wherein the time information includes at least one of the following: the starting transmission time position, the ending transmission time position, and the corresponding symbol when the transmission ends.

[0175] Then, the terminal device can determine the first identifier according to the time information of each repeatedly transmitted PDCCH.

[0176] In a possible implementation manner, the first rule may be, for example, determining the second PDCCH according to time information of each repeatedly transmitted PDCCH, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the most recently received PDCCH.

[0177] If the number of the second PDCCH is only one, that is, the earliest PDCCH, or there is only one PDCCH received most recently, the resource identifier of the second PDCCH may be determined as the first identifier.

[0178] Combine the following Fig. 9 The second PDCCH is described. Fig. 9 A schematic diagram of a second PDCCH provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown:

[0179] Fig. 9 Six PDCCHs for repeated transmission are given as an example, namely PDCCH1 to PDCCH6 for repeated transmission. In this embodiment, the second PDCCH is determined according to the time information of each PDCCH for repeated transmission.

[0180] In a possible implementation, the second PDCCH may be the PDCCH with the earliest start transmission time among the PDCCHs for repeated transmission, for example, Figure 6 PDCCH1 in.

[0181] Alternatively, the second PDCCH is the one with the earliest end of transmission time among the PDCCHs of repeated transmission, for example, Figure 6 PDCCH1 in.

[0182] Alternatively, the second PDCCH is the last symbol in which transmission ends among the PDCCHs that are repeatedly transmitted, for example, Figure 6 PDCCH6 in.

[0183] Next, after determining the second PDCCH, if the number of the second PDCCH is 1, that is, there is only one PDCCH received earliest or most recently, then the first rule may be: the first identifier is the resource identifier of the second PDCCH.

[0184] Combine the following Fig.10 The case where the number of the second PDCCH is 1 is described. Fig.10 A schematic diagram of determining a first identifier for a second PDCCH provided in an embodiment of the present application.

[0185] See also Fig.10 Assuming that the currently selected PDCCH is the earliest second PDCCH, that is, PDCCH1, and the number of the second PDCCH is only one, then the resource identifier of PDCCH1 is directly determined as the first identifier.

[0186] In an implementation manner, the resource identifier is an identifier of the second CORESET, the first identifier is an identifier of the first CORESET, and the first identifier of the first CORESET is an identifier of the second CORESET of PDCCH1.

[0187] In another implementation manner, the resource identifier is an identifier configured by the second higher layer, and the first identifier is an identifier configured by the first higher layer, and the first identifier is an identifier configured by the second higher layer of PDCCH1.

[0188] In still another implementation manner, the resource identifier is an identifier of the second search space, the first identifier is an identifier of the first search space, and the first identifier is an identifier of the second search space of PDCCH1.

[0189] Alternatively, if the number of second PDCCHs is greater than one, that is, there is more than one PDCCH received earliest or most recently, because the resource identifiers of the repeatedly transmitted PDCCHs are different, the resource identifier of the second PDCCH cannot be directly determined as the first identifier at this time. In this case, it is necessary to determine the first identifier based on the resource identifiers of the second search spaces of multiple second PDCCHs.

[0190] In a possible implementation manner, the third PDCCH may be determined according to identifiers of the second search spaces of multiple second PDCCHs.

[0191] The identifier of the second search space of the third PDCCH is the smallest identifier of the second search spaces of the second PDCCHs.

[0192] Alternatively, the identifier of the second search space of the third PDCCH is the largest one among the identifiers of the second search spaces of the second PDCCHs.

[0193] If the number of the third PDCCH is 1, that is, there is only one PDCCH with the largest or smallest identifier in the second search space, the first rule is: the first identifier is the identifier of the second search space of the third PDCCH.

[0194] Combine the following Fig.11 The case where the number of second PDCCHs is greater than 1 is described. Fig.11 A schematic diagram of determining a first identifier when multiple second PDCCHs are provided in an embodiment of the present application.

[0195] like Fig.11 As shown, assuming that the second PDCCH with the earliest time is currently selected, there are two second PDCCHs, namely PDCCH1 and PDCCH2. The third PDCCH can be determined in PDCCH1 and PDCCH2, wherein the second search space of PDCCH1 is identified as search space 1, and the second search space of PDCCH2 is identified as search space 2.

[0196] Assuming that the second PDCCH with the smallest identifier of the second search space is selected as the third PDCCH, the third PDCCH is PDCCH2, and the corresponding first identifier is the identifier of the second search space of PDCCH2, that is, the first identifier is search space 2. The terminal device can determine the identifier of the associated CORESET based on search space 2, and then determine the identifier of the CORESET poolindex, thereby determining the second identifier.

[0197] Assuming that the second PDCCH with the largest identifier of the second search space is selected as the third PDCCH, the third PDCCH is PDCCH1, and the corresponding first identifier is the identifier of the second search space of PDCCH1, that is, the first identifier is search space 1. The terminal device can determine the identifier of the associated CORESET based on search space 1, and then determine the identifier of the CORESET poolindex, thereby determining the second identifier.

[0198] Alternatively, if the number of third PDCCHs is greater than one, that is, there is more than one PDCCH with the smallest or largest identifier in the second search space, then the identifier of the second search space of the third PDCCH cannot be directly determined as the first identifier. It is necessary to determine the first identifier based on the identifier of the second CORESET associated with the second search space of multiple third PDCCHs.

[0199] In a possible implementation manner, the first rule may be: the first identifier is the smallest second CORESET identifier among identifiers of the second CORESETs associated with the second search spaces of the third PDCCHs.

[0200] In another possible implementation manner, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs associated with the second search spaces of the third PDCCHs.

[0201] Combine the following Fig.12 The case where the number of the third PDCCH is greater than 1 is described. Fig.12 A schematic diagram of determining the first identifier when multiple third PDCCHs are provided in an embodiment of the present application.

[0202] like Fig.12 As shown, assuming that the currently selected is the earliest second PDCCH, there are two second PDCCHs, namely PDCCH1 and PDCCH2, and the third PDCCH can be determined in PDCCH1 and PDCCH2, wherein the second search space identifier of PDCCH1 is search space 1, and the second search space identifier of PDCCH2 is search space 1, and the two search spaces are the same (the largest or the smallest), then there are two third PDCCHs, namely PDCCH1 and PDCCH2.

[0203] At this time, the first identifier is determined according to the identifier of the second CORESET associated with the second search space of PDCCH1 and PDCCH2.

[0204] Assume that the identifier of the second CORESET of PDCCH1 is CORESET1, and the identifier of the second CORESET of PDCCH2 is CORESET0.

[0205] Assuming that the identifier of the second CORESET with the smallest identifier is determined as the first identifier, the first identifier is the identifier of the second CORESET of PDCCH2, that is, the first identifier is CORESET0. The terminal device determines the identifier of the CORESET pool index according to the identifier of the CORESET, thereby determining the second identifier.

[0206] Assuming that the identifier of the second CORESET with the largest identifier is determined as the first identifier, the first identifier is the identifier of the second CORESET of PDCCH1, that is, the first identifier is CORESET1. The terminal device determines the identifier of the CORESET pool index according to the identifier of the CORESET, thereby determining the second identifier.

[0207] In summary, the earliest (latest received) second PDCCH is selected from the repeatedly transmitted PDCCHs. If there is only one second PDCCH, the resource identifier of the second PDCCH is determined as the first identifier.

[0208] If there is more than one second PDCCH, that is, if there is a second PDCCH with the same time, then select a third PDCCH with the smallest (largest) identifier of the second search space in the second PDCCH, and if there is only one third PDCCH, determine the identifier of the second search space of the third PDCCH as the first identifier;

[0209] If there is more than one third PDCCH, that is, if there is a third PDCCH with the same identifier as the second search space, then the identifier of the second CORESE with the smallest (largest) identifier associated with the second search space is determined in the second PDCCH, and the identifier of the smallest (largest) second CORESET is determined as the first identifier.

[0210] The above embodiment introduces that the time of PDCCH is first selected, and when the time is the same, the minimum or maximum second search space identifier is then selected. When the second search space identifier is the same, the minimum or maximum second CORESET identifier is then selected. In another possible implementation, the terminal device may also not consider the time of PDCCH, but directly select the minimum or maximum second search space identifier. When the second search space identifier is the same, the minimum or maximum second CORESET identifier is then selected. The current implementation method is described below in conjunction with a specific embodiment:

[0211] Among them, the first rule may, for example, be to determine the first identifier according to the identifier of the second search space corresponding to each PDCCH of repeated transmission, and the transmission method provided in the embodiment of the present application further includes:

[0212] Acquire, according to the first PDCCH, an identifier of a second search space of each PDCCH that is repeatedly transmitted;

[0213] The fourth PDCCH is determined according to the identifier of the second search space of each PDCCH, wherein the fourth PDCCH is the PDCCH with the largest identifier of the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier of the second search space.

[0214] The fourth PDCCH is a PDCCH with the largest or smallest identifier of the second search space among the repeatedly transmitted PDCCHs.

[0215] If the number of fourth PDCCHs is 1, that is, there is only one PDCCH with the largest or smallest identifier in the second search space, the first rule is: the first identifier is the identifier of the second search space of the fourth PDCCH.

[0216] Combine the following Fig.13 The case where the number of the fourth PDCCH is 1 is described. Fig.13 A schematic diagram of determining a first identifier for a fourth PDCCH provided in an embodiment of the present application.

[0217] like Fig.13As shown, assuming that the identifier of the second search space of PDCCH1 is search space 1, the identifier of the second search space of PDCCH2~6 is search space 2, assuming that the currently selected PDCCH is the one with the smallest identifier of the second search space, and the fourth PDCCH is PDCCH1, the identifier of the second search space of PDCCH1 can be directly determined as the first identifier, that is, the first identifier is search space 1, and the terminal device can determine the identifier of the associated CORESET according to search space 1, and then determine the identifier of the CORESET pool index, thereby determining the second identifier.

[0218] Alternatively, if the number of fourth PDCCHs is greater than one, that is, there is more than one PDCCH with the smallest or largest identifier in the second search space, then the identifier of the second search space of the fourth PDCCH cannot be directly determined as the first identifier. It is necessary to determine the first identifier based on the identifier of the second CORESET associated with the second search space of multiple fourth PDCCHs.

[0219] In a possible implementation manner, the first rule may be: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

[0220] In another possible implementation manner, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

[0221] Combine the following Fig.14 The case where the number of the fourth PDCCH is greater than 1 is described. Fig.14 A schematic diagram of determining the first identifier for multiple fourth PDCCHs provided in an embodiment of the present application.

[0222] like Fig.14 As shown, assuming that the second search space of PDCCH1 is identified as search space 1, and the second search space of PDCCH2~6 is identified as search space 2, and assuming that the currently selected PDCCH is the one with the largest identifier of the second search space, then the fourth PDCCHs are PDCCH1~PDCCH6, and there are 5 in total. At this time, the first identifier can be determined according to the identifier of the CORESET of each fourth PDCCH.

[0223] Among them, it is assumed that the identifier of the second CORESET associated with the identifier of the second search space of PDCCH1 is CORESET0, it is assumed that the identifier of the second CORESET associated with the identifier of the second search space of PDCCH2~PDCCH6 is CORESET1, and it is assumed that the first rule is: the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to each fourth PDCCH.

[0224] That is, if the first identifier is CORESET0, the terminal device determines the identifier of the CORESET poolindex corresponding to CORESET0, thereby determining the second identifier.

[0225] In summary, first, the fourth PDCCH with the smallest (or largest) identifier of the second search space is selected from the repeatedly transmitted PDCCHs. If there is only one fourth PDCCH, the identifier of the second search space of the fourth PDCCH is determined as the first identifier.

[0226] If there is more than one fourth PDCCH, that is, if there is a fourth PDCCH with the same identifier as the second search space, then the identifier of the second CORESE with the smallest (largest) identifier of the second CORESE associated with the second search space is selected in the fourth PDCCH, and the identifier of the smallest (largest) second CORESET is determined as the first identifier.

[0227] The above embodiment introduces that the smallest or largest second search space identifier is first selected. When the second search space identifiers are the same, the smallest or largest second CORESET identifier is then selected. In another possible implementation, the terminal device may also not consider the PDCCH time or the second search space identifier, but directly select the smallest or largest second CORESET identifier. The current implementation is described below in conjunction with a specific embodiment:

[0228] The current implementation is described below in conjunction with specific embodiments:

[0229] Among them, the first rule may, for example, determine the first identifier according to the identifier of the second CORESET associated with the identifier of the second search space corresponding to each PDCCH of repeated transmission, and the transmission method provided in the embodiment of the present application further includes:

[0230] According to the first PDCCH, an identifier of a second CORESET corresponding to each repeatedly transmitted PDCCH is obtained.

[0231] In a possible implementation manner, the first rule may be: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

[0232] In another possible implementation manner, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

[0233] Combine the following Fig.15 The case where the first identifier is determined according to the identifier of the second CORESET is described. Fig.15 A schematic diagram of determining a first identifier according to an identifier of a second CORESET provided in an embodiment of the present application.

[0234] like Fig.15 As shown, assuming that the identifier of the second CORESET of PDCCH1 is CORESET0, the identifier of the second CORESET of PDCCH2~5 is CORESET1, and the identifier of the second CORESET of PDCCH6 is CORESET2, assuming that the PDCCH with the largest identifier of the second CORESET, that is, PDCCH6, is currently selected, then the first identifier is CORESET2, and the terminal device determines the identifier of the CORESET pool index corresponding to CORESET2, thereby determining the second identifier.

[0235] In summary, the first identifier is determined by determining the minimum (or maximum) second CORESET identifier according to the second CORESET identifier of the repeatedly transmitted PDCCH.

[0236] It should be noted that when the identifiers of the second CORESETs are the same, the identifiers of the corresponding CORESET pool indexes are also the same. Therefore, when there are multiple PDCCHs with the same identifier of the second CORESET, no further selection is required.

[0237] Based on the above introduction, those skilled in the art can understand that the terminal device needs to determine which TRP to send the HARQ information to, and the network device also needs to determine which TRP to receive the HARQ information. Therefore, the network device also needs to determine the second identifier, wherein the implementation method on the network device side is similar to that on the terminal device side, except that the execution subject is different. The specific implementation method can refer to the introduction in the above embodiment, which will not be repeated here.

[0238] Fig.16 A schematic diagram of the structure of the transmission device provided in the embodiment of the present application Figure 1 . See Fig.16The communication device 160 may include a determination module 1601 and a receiving module 1602, wherein:

[0239] The determination module 1601 is used to determine a second identifier according to a first identifier used to indicate a resource for downlink control information, wherein the second identifier is an identifier of a high-layer configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the downlink control information.

[0240] In a possible implementation manner, the first identifier includes at least one of the following:

[0241] The identifier of the first control resource set CORESET, the identifier of the first high-level configuration, and the identifier of the first search space.

[0242] In a possible implementation manner, the identifier configured by the higher layer is used to distinguish the HARQ codebook.

[0243] In a possible implementation, it further includes: a receiving module 1602;

[0244] The receiving module 1602 is configured to receive at least one repeatedly transmitted physical downlink control channel PDCCH from a network device;

[0245] The PDSCH is received according to the time-frequency resources indicated by the at least one repeatedly transmitted PDCCH.

[0246] In a possible implementation manner, resource identifiers corresponding to the PDCCHs of the repeated transmission are different;

[0247] The resource identifier includes at least one of the following: an identifier of a second control resource set CORESET, an identifier of a second high-level configuration, and an identifier of a second search space. ;

[0248] Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH for repeated transmission belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH for repeated transmission belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH for repeated transmission belongs belongs.

[0249] In a possible implementation manner, the first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH.

[0250] In a possible implementation manner, the first identifier is dynamically indicated.

[0251] In a possible implementation manner, the first identifier is dynamically indicated by downlink control information DCI in the PDCCH.

[0252] In a possible implementation manner, the first identifier is semi-statically configured by high-layer signaling.

[0253] In a possible implementation manner, the high-layer signaling includes a first message, and the first message is used to determine the first identifier.

[0254] In a possible implementation manner, the first message is used to indicate the first identifier; or

[0255] The first message is used to indicate whether each resource identifier is a first identifier.

[0256] In a possible implementation manner, the first identifier is determined according to a first rule.

[0257] In a possible implementation, the receiving module 1602 is further configured to:

[0258] Receiving a first PDCCH, wherein the first PDCCH is received first among the PDCCHs that are repeatedly transmitted;

[0259] According to the first PDCCH, time information of each of the repeatedly transmitted PDCCHs is acquired, wherein the time information includes at least one of the following: a start transmission time position, an end transmission time position, and a corresponding symbol when the transmission ends.

[0260] In a possible implementation manner, the determining module 1601 is further configured to:

[0261] A second PDCCH is determined according to time information of each repeatedly transmitted PDCCH, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the latest received PDCCH.

[0262] In a possible implementation manner, the earliest second PDCCH is a PDCCH with the earliest start transmission time among the repeatedly transmitted PDCCHs.

[0263] In a possible implementation manner, the earliest second PDCCH is a PDCCH with the earliest transmission end time among the repeatedly transmitted PDCCHs.

[0264] In a possible implementation manner, the most recently received second PDCCH is the PDCCH with the last corresponding symbol at the end of transmission among the repeatedly transmitted PDCCHs.

[0265] In a possible implementation manner, if the number of the second PDCCH is 1, the first rule is: the first identifier is a resource identifier of the second PDCCH.

[0266] In a possible implementation manner, if the number of the second PDCCHs is greater than one, the first rule is: determining the first identifier according to an identifier of the second search space of each of the second PDCCHs.

[0267] In a possible implementation manner, the determining module 1601 is further configured to:

[0268] A third PDCCH is determined based on the identifier of the second search space of each of the second PDCCHs, wherein the third PDCCH is the PDCCH with the largest identifier of the second search space in each of the second PDCCHs, or the third PDCCH is the PDCCH with the smallest identifier of the second search space in each of the second PDCCHs.

[0269] In a possible implementation manner, if the number of the third PDCCH is 1, the first rule is: the first identifier is an identifier of the second search space of the third PDCCH.

[0270] In a possible implementation manner, if the number of the third PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second CORESET associated with the second search space of each of the third PDCCHs.

[0271] In a possible implementation manner, the first rule is: the first identifier is the smallest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

[0272] In a possible implementation manner, the first rule is: the first identifier is the largest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

[0273] In a possible implementation manner, the determining module 1601 is further configured to:

[0274] Acquire, according to the first PDCCH, an identifier of a second search space of each of the PDCCHs that are repeatedly transmitted;

[0275] A fourth PDCCH is determined according to the identifier of the second search space of each PDCCH, wherein the fourth PDCCH is the PDCCH with the largest identifier of the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier of the second search space.

[0276] In a possible implementation manner, if the number of the fourth PDCCH is 1, the first rule is: the first identifier is an identifier of the second search space of the fourth PDCCH.

[0277] In a possible implementation manner, if the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

[0278] In a possible implementation manner, if the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

[0279] In a possible implementation manner, the determining module 1601 is further configured to:

[0280] According to the first PDCCH, an identifier of a second CORESET corresponding to each of the repeatedly transmitted PDCCHs is obtained.

[0281] In a possible implementation manner, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

[0282] In a possible implementation manner, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

[0283] The transmission device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be repeated here.

[0284] Fig.17 A schematic diagram of the structure of the transmission device provided in the embodiment of the present application Figure 2 . See Fig.15 The transmission device 150 may include a determination module 1701 and a sending module 1702, wherein:

[0285] The determination module 1701 is used to determine a second identifier according to a first identifier used to indicate a resource for downlink control information, wherein the second identifier is an identifier of a high-layer configuration corresponding to a HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a PDSCH corresponding to the downlink control information.

[0286] In a possible implementation manner, the first identifier includes at least one of the following:

[0287] The identifier of the first control resource set CORESET, the identifier of the first high-level configuration, and the identifier of the first search space.

[0288] In a possible implementation manner, the identifier configured by the higher layer is used to distinguish the HARQ codebook.

[0289] In a possible implementation, the method further includes: a sending module 1702;

[0290] The sending module 1702 is used to send at least one repeatedly transmitted physical downlink control channel PDCCH to the terminal device, and the at least one repeatedly transmitted PDCCH is used to indicate the time-frequency resources of the PDSCH.

[0291] In a possible implementation manner, resource identifiers corresponding to the PDCCHs of the repeated transmission are different;

[0292] The resource identifier includes at least one of the following: an identifier of a second control resource set CORESET, an identifier of a second high-level configuration, and an identifier of a second search space. ;

[0293] Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH for repeated transmission belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH for repeated transmission belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH for repeated transmission belongs belongs.

[0294] In a possible implementation manner, the first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH.

[0295] In a possible implementation manner, the first identifier is dynamically indicated.

[0296] In a possible implementation manner, the first identifier is dynamically indicated by downlink control information DCI in the PDCCH.

[0297] In a possible implementation manner, the first identifier is semi-statically configured by high-layer signaling.

[0298] In a possible implementation manner, the high-layer signaling includes a first message, and the first message is used to determine the first identifier.

[0299] In a possible implementation manner, the first message is used to indicate the first identifier; or

[0300] The first message is used to indicate whether each resource identifier is a first identifier.

[0301] In a possible implementation manner, the first identifier is determined according to a first rule.

[0302] In a possible implementation manner, the sending module 1702 is further configured to:

[0303] A first PDCCH is sent to a terminal device, wherein the first PDCCH is the first one received by the terminal device among the repeatedly transmitted PDCCHs, and the first PDCCH is used to indicate time information of the repeatedly transmitted PDCCHs, wherein the time information includes at least one of the following: a starting transmission time position, an ending transmission time position, and a corresponding symbol when the transmission ends.

[0304] In a possible implementation manner, the sending module 1702 is further configured to:

[0305] A second PDCCH is sent to the terminal device, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the most recently received PDCCH.

[0306] In a possible implementation manner, the earliest second PDCCH is a PDCCH with the earliest start transmission time among the repeatedly transmitted PDCCHs.

[0307] In a possible implementation manner, the earliest second PDCCH is a PDCCH with the earliest transmission end time among the repeatedly transmitted PDCCHs.

[0308] In a possible implementation manner, the most recently received second PDCCH is the PDCCH with the last corresponding symbol at the end of transmission among the repeatedly transmitted PDCCHs.

[0309] In a possible implementation manner, if the number of the second PDCCH is 1, the first rule is: the first identifier is a resource identifier of the second PDCCH.

[0310] In a possible implementation manner, if the number of the second PDCCHs is greater than one, the first rule is: determining the first identifier according to an identifier of the second search space of each of the second PDCCHs.

[0311] In a possible implementation manner, the sending module 1702 is further configured to:

[0312] A third PDCCH is sent to the terminal device, wherein the third PDCCH is the PDCCH with the largest identifier of the second search space in each of the second PDCCHs, or the third PDCCH is the PDCCH with the smallest identifier of the second search space in each of the second PDCCHs.

[0313] In a possible implementation manner, if the number of the third PDCCH is 1, the first rule is: the first identifier is an identifier of the second search space of the third PDCCH.

[0314] In a possible implementation manner, if the number of the third PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second CORESET associated with the second search space of each of the third PDCCHs.

[0315] In a possible implementation manner, the first rule is: the first identifier is the smallest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

[0316] In a possible implementation manner, the first rule is: the first identifier is the largest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

[0317] In a possible implementation manner, the first PDCCH is further used to indicate an identifier of a second search space of each of the PDCCHs that are repeatedly transmitted;

[0318] The sending module 1702 is also used for:

[0319] A fourth PDCCH is sent to the terminal device, wherein the fourth PDCCH is the PDCCH with the largest identifier in the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier in the second search space.

[0320] The rest of the implementation methods are similar and will not be described here to save space.

[0321] The communication device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be repeated here.

[0322] Fig.18 This is a schematic diagram of the structure of the terminal device provided in the embodiment of the present application. Fig.18The terminal device 180 may include: a transceiver 21, a memory 22, and a processor 23. The transceiver 21 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, a transmitter, a transmission port, a transmission interface, or similar descriptions, and the receiver may also be referred to as a receiver, a receiver, a reception port, a reception interface, or similar descriptions. Exemplarily, the transceiver 21, the memory 22, and the processor 23 are interconnected via a bus 24.

[0323] The memory 22 is used to store program instructions;

[0324] The processor 23 is used to execute the program instructions stored in the memory, so as to enable the terminal device 20 to execute any of the transmission methods shown above.

[0325] Among them, the receiver of the transceiver 21 can be used to perform the receiving function of the terminal device in the above-mentioned transmission method.

[0326] Fig.19 This is a schematic diagram of the structure of the network device provided in the embodiment of the present application. Fig.19 The network device 190 may include: a transceiver 31, a memory 32, and a processor 33. The transceiver 31 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, a transmitter, a transmission port, a transmission interface, or similar descriptions, and the receiver may also be referred to as a receiver, a receiver, a reception port, a reception interface, or similar descriptions. Exemplarily, the transceiver 31, the memory 32, and the processor 33 are interconnected via a bus 34.

[0327] The memory 32 is used to store program instructions;

[0328] The processor 33 is used to execute the program instructions stored in the memory, so as to enable the terminal device 20 to execute any of the transmission methods shown above.

[0329] The receiver of the transceiver 31 can be used to perform the receiving function of the terminal device in the above transmission method.

[0330] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above-mentioned transmission method.

[0331] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above-mentioned transmission method.

[0332] The embodiment of the present application may also provide a computer program product, which can be executed by a processor. When the computer program product is executed, the transmission method executed by any of the terminal devices shown above can be implemented.

[0333] The transmission device, computer-readable storage medium and computer program product of the embodiments of the present application can execute the transmission method executed by the above-mentioned terminal device. The specific implementation process and beneficial effects thereof are as mentioned above and will not be repeated here.

[0334] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0335] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units.

[0336] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned method embodiments are implemented; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

[0337] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A transmission method, characterized in that: Applied to terminal equipment, including: Determine a second identifier according to a first identifier for indicating a resource of downlink control information DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to a hybrid automatic repeat request HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a physical downlink shared channel PDSCH corresponding to the DCI; The first identifier includes at least one of the following: An identifier of a first control resource set CORESET, an identifier of a first high-level configuration, and an identifier of a first search space; The identifier configured by the high layer is used to distinguish the HARQ codebook; The method further comprises: Receiving at least one repeatedly transmitted physical downlink control channel PDCCH from a network device; Receive the PDSCH according to the time-frequency resources indicated by the at least one repeatedly transmitted PDCCH; The method further comprises: Before receiving the repeatedly transmitted PDCCH, the terminal device receives a group of CORESETs configured from the network device, the CORESET being used to indicate a set of frequency domain resources for transmitting the PDCCH, wherein each of the CORESETs is configured with one or a group of transmission configuration indication states tci state, the tci state being used to indicate a channel filter coefficient corresponding to the demodulation detection of the candidate PDCCH of the search space associated with the CORESET by the terminal device; A set of search spaces configured from the network device is received, where the search space is used to indicate parameter configurations of time domain resources and monitoring periods of candidate PDCCHs, wherein at any time, each CORESET has only one activated tcistate.

2. The method according to claim 1, characterized in that The resource identifiers corresponding to the PDCCHs of repeated transmission are different; The resource identifier includes at least one of the following: an identifier of a second CORESET, an identifier of a second high-level configuration, and an identifier of a second search space; Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH for repeated transmission belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH for repeated transmission belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH for repeated transmission belongs belongs.

3. The method according to claim 2, characterized in that The first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH.

4. The method according to claim 2, characterized in that: The first identification is dynamically indicated.

5. The method according to claim 4, characterized in that The first identifier is dynamically indicated by the DCI in the PDCCH.

6. The method according to claim 2, characterized in that The first identifier is semi-statically configured by high-layer signaling.

7. The method according to claim 6, characterized in that The high-layer signaling includes a first message, and the first message is used to determine the first identifier.

8. The method according to claim 7, characterized in that The first message is used to indicate the first identifier; or The first message is used to indicate whether each resource identifier is a first identifier.

9. The method according to claim 2, characterized in that: The first identifier is determined according to a first rule.

10. The method according to claim 9, characterized in that The method further comprises: Receiving a first PDCCH, wherein the first PDCCH is received first among the PDCCHs that are repeatedly transmitted; According to the first PDCCH, time information of each of the repeatedly transmitted PDCCHs is acquired, wherein the time information includes at least one of the following: a start transmission time position, an end transmission time position, and a corresponding symbol when the transmission ends.

11. The method according to claim 10, characterized in that The method further comprises: A second PDCCH is determined according to time information of each of the repeatedly transmitted PDCCHs, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the most recently received PDCCH.

12. The method according to claim 11, characterized in that The earliest second PDCCH is the PDCCH with the earliest start transmission time among the repeatedly transmitted PDCCHs.

13. The method according to claim 11, characterized in that The earliest second PDCCH is the PDCCH with the earliest transmission end time among the repeatedly transmitted PDCCHs.

14. The method according to claim 11, characterized in that The most recently received second PDCCH is the PDCCH with the last corresponding symbol at the end of transmission among the repeatedly transmitted PDCCHs.

15. The method according to any one of claims 11 to 14, characterized in that: If the number of the second PDCCH is 1, the first rule is: the first identifier is the resource identifier of the second PDCCH.

16. The method according to any one of claims 11 to 14, characterized in that: If the number of the second PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second search space of each of the second PDCCHs.

17. The method according to claim 16, characterized in that The method further comprises: A third PDCCH is determined based on the identifier of the second search space of each of the second PDCCHs, wherein the third PDCCH is the PDCCH with the largest identifier of the second search space in each of the second PDCCHs, or the third PDCCH is the PDCCH with the smallest identifier of the second search space in each of the second PDCCHs.

18. The method according to claim 17, characterized in that If the number of the third PDCCH is 1, the first rule is: the first identifier is the identifier of the second search space of the third PDCCH.

19. The method according to claim 17, characterized in that If the number of the third PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second CORESET associated with the second search space of each of the third PDCCHs.

20. The method according to claim 19, characterized in that The first rule is that the first identifier is the smallest second CORESET identifier among identifiers of the second CORESETs associated with the second search spaces of the third PDCCHs.

21. The method according to claim 19, characterized in that The first rule is that the first identifier is the largest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

22. The method according to claim 10, characterized in that The method further comprises: Acquire, according to the first PDCCH, an identifier of a second search space of each of the PDCCHs that are repeatedly transmitted; A fourth PDCCH is determined according to the identifier of the second search space of each PDCCH, wherein the fourth PDCCH is the PDCCH with the largest identifier of the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier of the second search space.

23. The method according to claim 22, characterized in that If the number of the fourth PDCCH is 1, the first rule is: the first identifier is the identifier of the second search space of the fourth PDCCH.

24. The method according to claim 22, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

25. The method according to claim 22, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

26. The method according to claim 10, characterized in that The method further comprises: According to the first PDCCH, an identifier of a second CORESET corresponding to each of the repeatedly transmitted PDCCHs is obtained.

27. The method according to claim 26, characterized in that The first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

28. The method according to claim 26, characterized in that The first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

29. A transmission method, characterized in that: Applied to network equipment, including: Determine a second identifier according to a first identifier for indicating a resource of downlink control information DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to a hybrid automatic repeat request HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a physical downlink shared channel PDSCH corresponding to the DCI; The first identifier includes at least one of the following: An identifier of a first control resource set CORESET, an identifier of a first high-level configuration, and an identifier of a first search space; The identifier configured by the high layer is used to distinguish the HARQ codebook; The method further comprises: Sending at least one repeatedly transmitted physical downlink control channel PDCCH to a terminal device, where the at least one repeatedly transmitted PDCCH is used to indicate the time-frequency resources of the PDSCH; The method further comprises: Before sending at least one repeatedly transmitted PDCCH to the terminal device, a configured group of CORESETs is sent to the terminal device, the CORESET is used to indicate a frequency domain resource set for transmitting the PDCCH, wherein each of the CORESETs is configured with one or a group of transmission configuration indication states tci state, and the tci state is used to indicate the channel filter coefficient corresponding to the demodulation detection of the candidate PDCCH of the search space associated with the CORESET by the terminal device; A set of configured search spaces is sent to the terminal device, where the search space is used to indicate the parameter configuration of the time domain resources and the monitoring period of the candidate PDCCH, wherein at any time, each CORESET will only have one activated tcistate.

30. The method according to claim 29, characterized in that The resource identifiers corresponding to the PDCCHs of repeated transmission are different; The resource identifier includes at least one of the following: an identifier of a second CORESET, an identifier of a second high-level configuration, and an identifier of a second search space; Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH for repeated transmission belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH for repeated transmission belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH for repeated transmission belongs belongs.

31. The method according to claim 30, characterized in that The first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH.

32. The method according to claim 30, characterized in that The first identifier is dynamically indicated.

33. The method according to claim 32, characterized in that The first identifier is dynamically indicated by the DCI in the PDCCH.

34. The method according to claim 30, characterized in that The first identifier is semi-statically configured by high-layer signaling.

35. The method according to claim 34, characterized in that The high-layer signaling includes a first message, and the first message is used to determine the first identifier.

36. The method according to claim 35, characterized in that The first message is used to indicate the first identifier; or The first message is used to indicate whether each resource identifier is a first identifier.

37. The method according to claim 30, characterized in that The first identifier is determined according to a first rule.

38. The method according to claim 37, characterized in that The method further comprises: A first PDCCH is sent to a terminal device, wherein the first PDCCH is the first one received by the terminal device among the repeatedly transmitted PDCCHs, and the first PDCCH is used to indicate time information of the repeatedly transmitted PDCCHs, wherein the time information includes at least one of the following: a starting transmission time position, an ending transmission time position, and a corresponding symbol when the transmission ends.

39. The method according to claim 38, characterized in that The method further comprises: A second PDCCH is sent to the terminal device, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the most recently received PDCCH.

40. The method according to claim 39, characterized in that The earliest second PDCCH is the PDCCH with the earliest start transmission time among the repeatedly transmitted PDCCHs.

41. The method according to claim 39, characterized in that The earliest second PDCCH is the PDCCH with the earliest transmission end time among the repeatedly transmitted PDCCHs.

42. The method according to claim 39, characterized in that The most recently received second PDCCH is the PDCCH with the last corresponding symbol at the end of transmission among the repeatedly transmitted PDCCHs.

43. The method according to any one of claims 39 to 42, characterized in that: If the number of the second PDCCH is 1, the first rule is: the first identifier is the resource identifier of the second PDCCH.

44. The method according to any one of claims 39 to 42, characterized in that If the number of the second PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second search space of each of the second PDCCHs.

45. The method according to claim 44, characterized in that The method further comprises: A third PDCCH is sent to the terminal device, wherein the third PDCCH is the PDCCH with the largest identifier of the second search space in each of the second PDCCHs, or the third PDCCH is the PDCCH with the smallest identifier of the second search space in each of the second PDCCHs.

46. ​​The method according to claim 45, characterized in that If the number of the third PDCCH is 1, the first rule is: the first identifier is an identifier of the second search space of the third PDCCH.

47. The method according to claim 45, characterized in that If the number of the third PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second CORESET associated with the second search space of each of the third PDCCHs.

48. The method according to claim 47, characterized in that The first rule is that the first identifier is the smallest second CORESET identifier among identifiers of the second CORESETs associated with the second search spaces of the third PDCCHs.

49. The method according to claim 47, characterized in that The first rule is that the first identifier is the largest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

50. The method according to claim 38, characterized in that The first PDCCH is also used to indicate an identifier of a second search space of each of the PDCCHs that are repeatedly transmitted; The method further comprises: A fourth PDCCH is sent to the terminal device, wherein the fourth PDCCH is the PDCCH with the largest identifier in the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier in the second search space.

51. The method according to claim 50, characterized in that If the number of the fourth PDCCH is 1, the first rule is: the first identifier is the identifier of the second search space of the fourth PDCCH.

52. The method according to claim 51, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

53. The method according to claim 50, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

54. The method according to claim 38, characterized in that The first PDCCH is also used to indicate an identifier of a second CORESET corresponding to each of the repeatedly transmitted PDCCHs.

55. The method according to claim 54, characterized in that The first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

56. The method according to claim 54, characterized in that The first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

57. A transmission device, characterized in that: Applied to terminal equipment, including: A determination module, configured to determine a second identifier according to a first identifier for indicating a resource of downlink control information DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to a hybrid automatic repeat request HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a physical downlink shared channel PDSCH corresponding to the DCI; The first identifier includes at least one of the following: An identifier of a first control resource set CORESET, an identifier of a first high-level configuration, and an identifier of a first search space; The identifier configured by the high layer is used to distinguish the HARQ codebook; The device further comprises: a receiving module; The receiving module is used to receive at least one repeatedly transmitted physical downlink control channel PDCCH from a network device; Receive the PDSCH according to the time-frequency resources indicated by the at least one repeatedly transmitted PDCCH; The receiving module is further configured to receive a group of CORESETs configured from the network device before receiving the repeatedly transmitted PDCCH, wherein the CORESET is used to indicate a set of frequency domain resources for transmitting the PDCCH, wherein each of the CORESETs is configured with one or a group of transmission configuration indication states tci state, and the tci state is used to indicate a channel filter coefficient corresponding to the demodulation detection of the candidate PDCCH in the search space associated with the CORESET by the terminal device; A set of search spaces configured from the network device is received, where the search space is used to indicate parameter configurations of time domain resources and monitoring periods of candidate PDCCHs, wherein at any time, each CORESET has only one activated tcistate.

58. The device according to claim 57, characterized in that The resource identifiers corresponding to the PDCCHs of repeated transmission are different; The resource identifier includes at least one of the following: an identifier of a second CORESET, an identifier of a second high-level configuration, and an identifier of a second search space; Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH for repeated transmission belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH for repeated transmission belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH for repeated transmission belongs belongs.

59. The device according to claim 58, characterized in that The first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH.

60. The device according to claim 58, characterized in that The first identifier is dynamically indicated.

61. The device according to claim 60, characterized in that The first identifier is dynamically indicated by the DCI in the PDCCH.

62. The device according to claim 58, characterized in that The first identifier is semi-statically configured by high-layer signaling.

63. The device according to claim 62, characterized in that The high-layer signaling includes a first message, and the first message is used to determine the first identifier.

64. The device according to claim 63, characterized in that The first message is used to indicate the first identifier; or The first message is used to indicate whether each resource identifier is a first identifier.

65. The device according to claim 58, characterized in that The first identifier is determined according to a first rule.

66. The device according to claim 65, characterized in that The receiving module is also used for: Receiving a first PDCCH, wherein the first PDCCH is received first among the PDCCHs that are repeatedly transmitted; According to the first PDCCH, time information of each of the repeatedly transmitted PDCCHs is acquired, wherein the time information includes at least one of the following: a start transmission time position, an end transmission time position, and a corresponding symbol when the transmission ends.

67. The device according to claim 66, characterized in that The determining module is also used for: A second PDCCH is determined according to time information of each repeatedly transmitted PDCCH, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the latest received PDCCH.

68. The device according to claim 67, characterized in that The earliest second PDCCH is the PDCCH with the earliest start transmission time among the repeatedly transmitted PDCCHs.

69. The device according to claim 67, characterized in that The earliest second PDCCH is the PDCCH with the earliest transmission end time among the repeatedly transmitted PDCCHs.

70. The device according to claim 67, characterized in that The most recently received second PDCCH is the PDCCH with the last corresponding symbol at the end of transmission among the repeatedly transmitted PDCCHs.

71. The device according to any one of claims 67 to 70, characterized in that If the number of the second PDCCH is 1, the first rule is: the first identifier is the resource identifier of the second PDCCH.

72. The device according to any one of claims 67 to 70, characterized in that If the number of the second PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second search space of each of the second PDCCHs.

73. The device according to claim 72, characterized in that The determining module is also used for: A third PDCCH is determined based on the identifier of the second search space of each of the second PDCCHs, wherein the third PDCCH is the PDCCH with the largest identifier of the second search space in each of the second PDCCHs, or the third PDCCH is the PDCCH with the smallest identifier of the second search space in each of the second PDCCHs.

74. The device according to claim 73, characterized in that If the number of the third PDCCH is 1, the first rule is: the first identifier is an identifier of the second search space of the third PDCCH.

75. The device according to claim 73, characterized in that If the number of the third PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second CORESET associated with the second search space of each of the third PDCCHs.

76. The device according to claim 75, characterized in that The first rule is that the first identifier is the smallest second CORESET identifier among identifiers of the second CORESETs associated with the second search spaces of the third PDCCHs.

77. The device according to claim 75, characterized in that The first rule is that the first identifier is the largest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

78. The device according to claim 66, characterized in that The determining module is also used for: Acquire, according to the first PDCCH, an identifier of a second search space of each of the PDCCHs that are repeatedly transmitted; A fourth PDCCH is determined according to the identifier of the second search space of each PDCCH, wherein the fourth PDCCH is the PDCCH with the largest identifier of the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier of the second search space.

79. The device according to claim 78, characterized in that If the number of the fourth PDCCH is 1, the first rule is: the first identifier is the identifier of the second search space of the fourth PDCCH.

80. The device according to claim 78, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

81. The device according to claim 78, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

82. The device according to claim 66, characterized in that The determining module is also used for: According to the first PDCCH, an identifier of a second CORESET corresponding to each of the repeatedly transmitted PDCCHs is obtained.

83. The device according to claim 82, characterized in that The first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

84. The device according to claim 82, characterized in that The first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

85. A transmission device, characterized in that: Applied to network equipment, including: A determination module, configured to determine a second identifier according to a first identifier for indicating a resource of downlink control information DCI, wherein the second identifier is an identifier of a high-layer configuration corresponding to a hybrid automatic repeat request HARQ codebook, and the HARQ codebook is a codebook used for HARQ feedback of a physical downlink shared channel PDSCH corresponding to the DCI; The first identifier includes at least one of the following: An identifier of a first control resource set CORESET, an identifier of a first high-level configuration, and an identifier of a first search space; The identifier configured by the high layer is used to distinguish the HARQ codebook; The device also includes: a sending module; The sending module is used to send at least one repeatedly transmitted physical downlink control channel PDCCH to the terminal device, where the at least one repeatedly transmitted PDCCH is used to indicate the time-frequency resources of the PDSCH; The sending module is further used to send a configured set of CORESETs to the terminal device before sending at least one repeatedly transmitted PDCCH to the terminal device, wherein the CORESET is used to indicate a frequency domain resource set for transmitting the PDCCH, wherein each of the CORESETs is configured with one or a group of transmission configuration indication states tci state, and the tci state is used to indicate the channel filter coefficient corresponding to the demodulation detection of the candidate PDCCH of the search space associated with the CORESET by the terminal device; A set of configured search spaces is sent to the terminal device, where the search space is used to indicate the parameter configuration of the time domain resources and the monitoring period of the candidate PDCCH, wherein at any time, each CORESET will only have one activated tcistate.

86. The device according to claim 85, characterized in that The resource identifiers corresponding to the PDCCHs of repeated transmission are different; The resource identifier includes at least one of the following: an identifier of a second CORESET, an identifier of a second high-level configuration, and an identifier of a second search space; Among them, the identifier of the second CORESET is the identifier of the CORESET to which the PDCCH for repeated transmission belongs, the identifier of the second search space is the identifier of the search space to which the PDCCH for repeated transmission belongs, and the identifier of the second high-level configuration is the identifier of the CORESET group to which the CORESET to which the PDCCH for repeated transmission belongs belongs.

87. The device according to claim 86, characterized in that The first identifier is used to determine the HARQ codebook corresponding to the PDSCH indicated by the repeatedly transmitted PDCCH.

88. The device according to claim 86, characterized in that The first identification is dynamically indicated.

89. The device according to claim 88, characterized in that The first identifier is dynamically indicated by the DCI in the PDCCH.

90. The device according to claim 86, characterized in that The first identifier is semi-statically configured by high-layer signaling.

91. The device according to claim 90, characterized in that The high-layer signaling includes a first message, and the first message is used to determine the first identifier.

92. The device according to claim 91, characterized in that The first message is used to indicate the first identifier; or The first message is used to indicate whether each resource identifier is a first identifier.

93. The device according to claim 86, characterized in that The first identifier is determined according to a first rule.

94. The device according to claim 93, characterized in that The sending module is also used for: A first PDCCH is sent to a terminal device, wherein the first PDCCH is the first one received by the terminal device among the repeatedly transmitted PDCCHs, and the first PDCCH is used to indicate time information of the repeatedly transmitted PDCCHs, wherein the time information includes at least one of the following: a starting transmission time position, an ending transmission time position, and a corresponding symbol when the transmission ends.

95. The device according to claim 94, characterized in that The sending module is also used for: A second PDCCH is sent to the terminal device, wherein the second PDCCH is the earliest PDCCH, or the second PDCCH is the most recently received PDCCH.

96. The device according to claim 95, characterized in that The earliest second PDCCH is the PDCCH with the earliest start transmission time among the repeatedly transmitted PDCCHs.

97. The device according to claim 95, characterized in that The earliest second PDCCH is the PDCCH with the earliest transmission end time among the repeatedly transmitted PDCCHs.

98. The device according to claim 95, characterized in that The most recently received second PDCCH is the PDCCH with the last corresponding symbol at the end of transmission among the repeatedly transmitted PDCCHs.

99. The device according to any one of claims 95 to 98, characterized in that If the number of the second PDCCH is 1, the first rule is: the first identifier is the resource identifier of the second PDCCH.

100. The device according to any one of claims 95-98, characterized in that If the number of the second PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second search space of each of the second PDCCHs.

101. The device according to claim 100, characterized in that The sending module is also used for: A third PDCCH is sent to the terminal device, wherein the third PDCCH is the PDCCH with the largest identifier of the second search space in each of the second PDCCHs, or the third PDCCH is the PDCCH with the smallest identifier of the second search space in each of the second PDCCHs.

102. The device according to claim 101, characterized in that If the number of the third PDCCH is 1, the first rule is: the first identifier is the identifier of the second search space of the third PDCCH.

103. The device according to claim 101, characterized in that If the number of the third PDCCHs is greater than one, the first rule is: determining the first identifier according to the identifier of the second CORESET associated with the second search space of each of the third PDCCHs.

104. The device according to claim 103, characterized in that The first rule is that the first identifier is the smallest second CORESET identifier among identifiers of the second CORESETs associated with the second search spaces of the third PDCCHs.

105. The device according to claim 103, characterized in that The first rule is that the first identifier is the largest second CORESET identifier among identifiers of second CORESETs associated with the second search spaces of the third PDCCHs.

106. The device according to claim 94, characterized in that The first PDCCH is also used to indicate an identifier of a second search space of each of the PDCCHs that are repeatedly transmitted; The sending module is also used for: A fourth PDCCH is sent to the terminal device, wherein the fourth PDCCH is the PDCCH with the largest identifier in the second search space, or the fourth PDCCH is the PDCCH with the smallest identifier in the second search space.

107. The device according to claim 106, characterized in that If the number of the fourth PDCCH is 1, the first rule is: the first identifier is the identifier of the second search space of the fourth PDCCH.

108. The device according to claim 107, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

109. The device according to claim 106, characterized in that If the number of the fourth PDCCHs is greater than one, the first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the fourth PDCCHs.

110. The device according to claim 94, characterized in that The first PDCCH is also used to indicate an identifier of a second CORESET corresponding to each of the repeatedly transmitted PDCCHs.

111. The device according to claim 110, characterized in that The first rule is: the first identifier is the largest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

112. The device according to claim 110, characterized in that The first rule is: the first identifier is the smallest second CORESET identifier among the identifiers of the second CORESETs corresponding to the PDCCHs that are repeatedly transmitted.

113. A terminal device, characterized in that: include: Transceivers, processors, memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the transmission method according to any one of claims 1 to 28.

114. A network device, characterized in that: include: Transceivers, processors, memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the transmission method according to any one of claims 29-56.

115. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the transmission method according to any one of claims 1 to 28.

116. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the transmission method as described in any one of claims 29-56.

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