Precoding indication method and apparatus

Abstract

This disclosure proposes a non-codebook-based PUSCH transmission configuration method and apparatus, relating to the field of communications. The technical solution of this application mainly involves a network device sending a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on this single DCI. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field.

Description

Technical Field

[0001] This disclosure relates to the field of mobile communication technology, and in particular to a precoding instruction method and apparatus. Background Technology

[0002] In new radio (NR) systems, multi-point cooperative transmission has become an important technical means to improve coverage at cell edges and provide better service quality within the service area. In Rel-18, it is desirable to achieve simultaneous cooperative transmission from multiple antenna panels to multiple transmission and reception points (TRPs) to enhance transmission reliability and throughput. Therefore, user equipment (UE) is required to have the ability to transmit multiple beams simultaneously. Multi-antenna panel / multi-TRP transmission can be scheduled based on a single physical downlink control channel (PDCCH).

[0003] When scheduling multi-antenna panel / multi-TRP transmissions based on a single PDCCH, it is extremely important to switch between single-TRP and multi-TRP transmissions in order to make multi-point cooperative transmissions more useful. Summary of the Invention

[0004] This disclosure proposes a precoding indication method and apparatus. Based on the proposed technical solution, mechanism, method, and apparatus, it is possible to switch between single TRP and multiple TRP to make multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0005] A first aspect of this disclosure provides a precoding indication method performed by a network device. The method includes: sending a single Downlink Control Information (DCI) to a UE, the single DCI including Transmission Configuration Indicator (TCI) beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission; when the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission; and when the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission; wherein each set of information indication fields includes at least one of a Sounding Reference Signal (SRS) Resource Indicator (SRI) indication field and a Transmit Precoding Matrix Indicator (TPMI) indication field.

[0006] Optionally, when the transmission configuration information includes two or more TPMI indication fields, the multi-antenna panel multi-TRP transmission is a codebook-based Physical Downlink Shared Channel (PUSCH) transmission, wherein each of the two or more TPMI indication fields is used to indicate the precoding matrix TPMI of the PUSCH transmission in the associated beam direction; and when the transmission configuration information includes two or more SRI indication fields, the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, wherein each of the two or more SRI indication fields is used to indicate one or more SRS resources carrying precoding information in the SRS resource set allocated to the PUSCH transmission in the associated beam direction.

[0007] Optionally, each of the two or more TPMI indication fields indicates TPMI and Transmission Rank Indicator (TRI) according to a codebook pre-configuration table, and the codebook pre-configuration table is determined according to the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is determined according to the number of available TPMI combinations in the corresponding codebook pre-configuration table.

[0008] Optionally, the method further includes: obtaining rank indication information, the rank indication information being used to indicate the TRI used for PUSCH transmission in each beam direction of the UE; and wherein each of the two or more TPMI indication fields indicates a TPMI according to a TPMI sub-table, wherein the TPMI sub-table is determined from a codebook pre-configuration table according to the TRI used for PUSCH transmission in the corresponding beam direction, the codebook pre-configuration table being determined according to the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max It is determined that each available TRI is configured according to the codebook parameters of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction.

[0009] Optionally, for a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent the K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... This indicates rounding up to the nearest integer.

[0010] Optionally, each of the two or more SRI indication fields indicates SRI and TRI according to an SRI pre-configuration table, wherein the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table.

[0011] Optionally, the method further includes: obtaining rank indication information, the rank indication information being used to indicate the TRI used for PUSCH transmission in each beam direction of the UE; and wherein each of the two or more SRI indication fields indicates an SRI according to an SRI sub-table, wherein the SRI sub-table is determined from an SRI pre-configuration table according to the TRI used for PUSCH transmission in the corresponding beam direction, the SRI pre-configuration table being determined based on an SRI pre-configuration table determined based on the maximum number of uplink transmission layers supported by PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max It is determined that each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction.

[0012] Optionally, for a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent the K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M²-K²) code points are reserved values, where M² is... This indicates rounding up to the nearest integer.

[0013] Optionally, the rank indication information is obtained based on any of the following: the demodulation reference signal (DMRS) domain of the individual DCI; the reserved or extended code points of any indication domain in the individual DCI; the newly added indication domain in the individual DCI; and the number of codewords supported by the individual DCI.

[0014] Optionally, when the transmission configuration information is used for two or more sets of information indication fields in a multi-antenna panel multi-TRP transmission and the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the association between the SRI indication field and the SRS resource set is predefined or indicated by the SRS resource set indication field in the single DCI.

[0015] A second aspect of this disclosure provides a precoding indication method for execution by a UE, the method comprising: receiving a single DCI carrying TCI beam indication information and transmission configuration information transmitted by a network device, wherein the TCI beam indication information is used to indicate beam information used by the UE for transmission, and when the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission, and when the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission, wherein each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field; and performing PUSCH transmission according to the single DCI.

[0016] Optionally, when the transmission configuration information includes two or more TPMI indication fields, the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, wherein each of the two or more TPMI indication fields is used to indicate the precoding matrix of the PUSCH transmission in the associated beam direction; and when the TCI beam indication information indicates two or more beams and the transmission configuration information includes two or more SRI indication fields, the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, wherein each of the two or more SRI indication fields is used to indicate one or more SRS resources carrying precoding information in the SRS resource set allocated to the PUSCH transmission in the associated beam direction.

[0017] Optionally, when the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI includes: determining a precoding matrix for PUSCH transmission in each beam direction based on the TPMI and TRI indicated in each of the two or more TPMI indication fields and a codebook preconfiguration table, wherein the codebook preconfiguration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset restriction for PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is determined based on the number of available TPMI combinations in the codebook preconfiguration table; and performing codebook-based PUSCH transmission in each beam direction based on the corresponding precoding matrix TPMI.

[0018] Optionally, when the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI includes: determining a precoding matrix for PUSCH transmission in each beam direction based on the TPMI indicated in each of the two or more TPMI indication fields and a TPMI sub-table, wherein the TPMI sub-table is determined from a codebook pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction, the codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset restriction for PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max The determination is made based on the codebook parameter configuration of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction; and codebook-based PUSCH transmission is performed in each beam direction according to the corresponding precoding matrix TPMI.

[0019] Optionally, for a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent the K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... This indicates rounding up to the nearest integer.

[0020] Optionally, when the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI includes: determining SRS resources for PUSCH transmission in each beam direction based on the SRI and TRI indicated in each of the two or more SRI indication fields and the SRI pre-configuration table, wherein the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table; and performing non-codebook-based PUSCH transmission in each beam direction using the precoding information carried by the corresponding SRS resources.

[0021] Optionally, when the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI includes: determining SRS resources for PUSCH transmission in each beam direction based on the SRI indicated in each of the two or more SRI indication fields and the SRI sub-table, wherein the SRI sub-table is determined from the SRI pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction, the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is based on the maximum value N of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max It is determined that each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction; and that non-codebook-based PUSCH transmission is performed in each beam direction using precoding information carried by the corresponding SRS resources.

[0022] Optionally, for a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent the K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M²-K²) code points are reserved values, where M² is... This indicates rounding up to the nearest integer.

[0023] A third aspect of this disclosure provides a precoding indication apparatus for a network device, comprising: a transceiver module for transmitting downlink control information (DCI) to a user equipment (UE), the single DCI including transmission control information (TCI) beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, and when the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission, and when the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission; wherein each set of information indication fields includes at least one of a sounding reference signal (SRS) resource indication (SRI) field and a transmission precoding matrix indication (TPMI) field.

[0024] A fourth aspect of this disclosure provides a precoding indication apparatus for a UE, comprising: a transceiver module for receiving a single DCI carrying TCI beam indication information and transmission configuration information transmitted by a network device, wherein the TCI beam indication information is used to indicate beam information used by the UE for transmission, and when the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission, and when the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission, wherein each set of information indication fields includes at least one of a Sounding Reference Signal Resource Indicator (SRS) indication field and a Transmission Precoding Matrix Indicator (TPMI) indication field; and a processing module for performing PUSCH transmission based on the single DCI.

[0025] A fifth aspect embodiment of this disclosure provides a communication device, including: a transceiver; a memory; and a processor, respectively connected to the transceiver and the memory, configured to control the wireless signal transmission and reception of the transceiver by executing computer-executable instructions on the memory, and capable of implementing the precoding instruction method of the first aspect embodiment or the second aspect embodiment described above.

[0026] The sixth embodiment of this disclosure provides a computer storage medium storing computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the precoding instruction method of the first or second aspect embodiment described above.

[0027] This disclosure provides a precoding indication method and apparatus. A network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field. According to the precoding indication method and apparatus of this disclosure, the single DCI carries TCI beam indication information and transmission configuration information, and the information indication fields included in the transmission configuration information of the single DCI can be dynamically applied to single-antenna panel single-TRP transmission and multi-antenna panel multi-TRP transmission, thereby enabling switching between single TRP and multi-TRP to make multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0028] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0030] Figure 1 This is an exemplary multi-TRP related operation based on a single DCI for downlink transmission according to embodiments of this disclosure;

[0031] Figure 2 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0032] Figure 3 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0033] Figure 4 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0034] Figure 5 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0035] Figure 6 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0036] Figure 7 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0037] Figure 8 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0038] Figure 9 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0039] Figure 10 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0040] Figure 11 This is a flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure;

[0041] Figure 12 This is a block diagram of a precoding instruction device according to an embodiment of the present disclosure;

[0042] Figure 13This is a block diagram of a precoding instruction device according to an embodiment of the present disclosure;

[0043] Figure 14 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure;

[0044] Figure 15 This is a schematic diagram of the structure of a chip provided in an embodiment of the present disclosure. Detailed Implementation

[0045] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0046] In 5G / NR Rel-16, multi-TRP related operations were introduced primarily for PDSCH transmission. These operations can include single DCI operations and multi-DCI operations. Using a single DCI, a single PDCCH can be used to schedule multiple PDSCH transmissions from multiple TRPs.

[0047] Figure 1 An exemplary multi-TRP related operation based on a single DCI for downlink transmission according to an embodiment of this disclosure is illustrated. As an example, two TRPs (TRP#A and TRP#B) are provided to communicate with a UE having multiple antenna panels. Figure 1 As shown, for a single DCI operation, a single PDCCH carrying a single DCI from TRP#A can schedule both PDSCH transmissions from TRP#A to the UE (PDSCH#1) and PDSCH transmissions from TRP#B to the UE (PDSCH#2).

[0048] As mentioned above, operations related to multiple TRPs can include single DCI operations and multiple DCI operations. On the other hand, operations related to multiple TRPs can include operations related to multiple TRPs for downlink (e.g., PDSCH) and operations related to multiple TRPs for uplink (e.g., PUSCH). In 5G / NR Rel-16, operations related to multiple TRPs were mainly introduced for PDSCH transmission, but operations related to multiple TRPs for PUSCH transmission were not defined.

[0049] In R18, the uplink simultaneous transmission may support the following transmission schemes: uplink synchronous transmission for multi-antenna panel / receive and transmit point TRP / transmission configuration indication TCI; and cooperative transmission of a transport block (TB) based on a single DCI (S-DCI) PUSCH transmission. Several different transmission schemes are included, each of which is briefly described below:

[0050] One approach is the Space Division Multiplexing (SDM) approach: A TB of the PUSCH transmits to two different TRPs on the same time-frequency resources through the corresponding demodulation reference signal (DMRS) ports or port combinations allocated on different panels. Different Panels / TRPs / Transmission Occasions (TOs) are associated with different TCI states, i.e., with different beams. Based on this, the SDM scheme is further divided into two schemes: SDM-A and SDM-B. In the SDM-A scheme, different parts of a TB of a PUSCH are transmitted to two different TRPs on the same time-frequency resources through their respective DMRS ports or port combinations allocated on different panels. Different panels / TRPs / TOs are associated with different TCI states. In the SDM-B scheme, duplicates of the same TB of different RV versions of the PUSCH are transmitted to two different TRPs on the same time-frequency resources through their respective DMRS ports or port combinations allocated on different panels. Different panels / TRPs / TOs are associated with different TCI states.

[0051] Another approach is Frequency Division Multiplexing (FDM): A TB of a PUSCH is transmitted to two different TRPs on non-overlapping frequency resources in the same time domain through the same DMRS ports or port combinations allocated on different panels. Different panels / TRPs / TOs are associated with different TCI states. Based on this, the FDM scheme is further divided into FDM-A and FDM-B schemes. In FDM-A, different parts of a TB of a PUSCH are transmitted to two different TRPs on non-overlapping frequency resources in the same time domain through the same DMRS ports or port combinations allocated on different panels. Different panels / TRPs / TOs are associated with different TCI states. In FDM-B, duplicates of the same TB corresponding to different RV versions of the PUSCH are transmitted to two different TRPs on non-overlapping frequency resources in the same time domain through the same DMRS ports or port combinations allocated on different panels. Different panels / TRPs / TOs are associated with different TCI states.

[0052] Another approach is the Spatial Multiplexing (SFN) scheme: A TB of PUSCH transmits to two different TRPs on the same time-frequency resources through the same DMRS port or port combination allocated on different Panels. Different Panels / TRPs / TOs are associated with different TCI states.

[0053] Simultaneous uplink PUSCH transmission based on multiple panels typically supports one or more of the above schemes.

[0054] When scheduling multi-antenna panel / multi-TRP transmissions based on a single PDCCH, it is extremely important to switch between single-TRP and multi-TRP transmissions in order to make multi-point cooperative transmissions more useful.

[0055] This application provides a technical solution that enables switching between single TRP and multiple TRP to make multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0056] The precoding instruction method and apparatus provided in this application will be described in detail below with reference to the accompanying drawings.

[0057] Figure 2 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 2 As shown, the method can be executed by a network device and may include the following steps.

[0058] S201, a single DCI is sent to the UE. This single DCI includes TCI beam indication information and transmission configuration information. The TCI beam indication information indicates the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel, single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel, multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field.

[0059] In this embodiment, the DCI includes TCI beam indication information and transmission configuration information. Depending on whether the TCI beam indication information indicates one beam or two or more beams, the transmission configuration information can dynamically include one set of information indication fields or two or more sets of information indication fields. When the transmission configuration information includes one set of information indication fields, the DCI can be used for single-antenna panel single-TRP transmission. When the transmission configuration information includes two or more sets of information indication fields, the DCI can be used for multi-antenna panel multi-TRP transmission. Each set of information indication fields can be at least one of SRI indication fields and TPMI indication fields, but this application is not limited to this; each set of information indication fields may also include other information indication fields besides SRI and TPMI indication fields.

[0060] In some embodiments, the TCI beam indication information in a single DCI indicates a beam and the transmission configuration information may include a TPMI indication field, wherein the TPMI indication field is used to indicate the precoding matrix of PUSCH transmission in the direction of the beam, then the single DCI is used for single antenna panel single TRP transmission, and the single antenna panel single TRP transmission is codebook-based PUSCH transmission.

[0061] In some embodiments, the TCI beam indication information in a single DCI indicates two or more beams, and the transmission configuration information may include two or more TPMI indication fields, wherein each TPMI indication field is used to indicate the precoding matrix of the PUSCH transmission in the corresponding beam direction. In this case, the single DCI is used for multi-antenna panel multi-TRP transmission, and the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission. For each PUSCH transmission in the beam direction, a TPMI indication field indicates the precoding matrix used in that PUSCH transmission.

[0062] In some embodiments, the TCI beam indication information in a single DCI indicates a beam and the transmission configuration information may include an SRI indication field, wherein the SRI indication field is used to indicate one or more SRS resources carrying precoded information in the SRS resource set to which the PUSCH transmission in the beam direction is allocated. In this case, the single DCI is used for single antenna panel single TRP transmission, and the single antenna panel single TRP transmission is a non-codebook-based PUSCH transmission.

[0063] In some embodiments, the TCI beam indication information in a single DCI indicates two or more beams, and the transmission configuration information may include two or more SRI indication fields, wherein each SRI indication field is used for one or more SRS resources carrying precoded information in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. In this case, the single DCI is used for multi-antenna panel multi-TRP transmission, and the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission. For each beam direction PUSCH transmission, one SRI indication field indicates one or more SRS resources selected from the SRS resource set allocated to that PUSCH transmission. For codebook-based PUSCH transmission, the SRI indication selects a corresponding spatial filter for the PUSCH transmission; that is, the PUSCH uses the spatial relationship information (TCI or Spatial Relation Info) corresponding to the SRS resources selected by the SRI as the spatial filter used for transmission. In non-codebook-based PUSCH transmission, multiple single-port SRS resources in an SRS resource set carry PUSCH precoding information calculated and suggested by the terminal. Each SRS resource carries precoding information used by the corresponding layer of data. The base station schedules and selects precoding information reported by the terminal through measurement and selects precoding information through SRI indication, that is, selects one or more SRS resources in the corresponding SRS resource set. After receiving the SRI indication from the base station, the terminal uses the precoding corresponding to one or more SRS resources as the precoding used for PUSCH transmission.

[0064] According to the precoding indication method of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information indicates the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field. The information indication fields included in the transmission configuration information of the single DCI can be dynamically applied to single-antenna panel single-TRP transmission and multi-antenna panel multi-TRP transmission, thereby enabling switching between single-TRP and multi-TRP to make multi-point cooperative transmission more efficient, thus effectively improving the reliability and throughput of data transmission.

[0065] Figure 3 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 3 As shown, the method can be executed by a network device and may include the following steps.

[0066] S301, send a single DCI to the UE, the single DCI including TCI beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields for multi-antenna panel multi-TRP transmission, and each TPMI indication field indicates TPMI and TRI according to the codebook pre-configuration table.

[0067] The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the corresponding codebook subset restrictions for PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is determined based on the number of available TPMI combinations in the codebook pre-configuration table.

[0068] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and this multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission. Each codebook-based PUSCH transmission in each beam direction corresponds to one TPMI indication field; that is, one TPMI indication field can indicate the precoding matrix of a codebook-based PUSCH transmission in one beam direction. The network device can determine the codebook parameter configuration and codebook subset restrictions for PUSCH transmission in each beam direction, thereby determining the codebook pre-configuration table for PUSCH transmission in each beam direction. Each TPMI indication field included in the transmission configuration information carried in the DCI sent by the network device to the UE can carry an index, which is used to simultaneously indicate TPMI and TRI according to the codebook pre-configuration table. The number of bits occupied by each TPMI indication field is determined according to the number of available TPMI combinations in the corresponding codebook pre-configuration table.

[0069] The codebook parameter configuration allows for settings such as the number of antenna ports, whether to use transform precoding, and maxRank. The codebook subset restrictions include three types: fullyAndPartialAndNonCoherent; partiallyAndNonCoherent; and nonCoherent.

[0070] For example, for a PUSCH transmission associated with an antenna panel / TRP / PUSCH transmission timing / TCI beam direction, when the network device determines that a set of codebook parameters for the PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoding (DFT-s-OFDM), maxRank = 2, 3, or 4 (for 4 antenna ports, if transform precoder is disabled, maxRank = 2, 3, or 4), and the codebook subset for the PUSCH transmission in that beam direction is limited to partial and unrelated, the network device can determine that the codebook preconfiguration table for the PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 1 below. The TPMI indicator field used to indicate the precoding matrix for the PUSCH transmission in that beam direction can indicate TPMI and TRI according to this table. For example, if the TPMI indicator field carries index 1, it indicates TRI = 1 and TPMI = 1; if the TPMI indicator field carries index 11, it indicates TRI = 4 and TPMI = 0. In this table, there are 32 available TPMI combinations, so the number of bits occupied by the TPMI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0071]

[0072] Table 1

[0073] For example, for PUSCH transmission in another beam direction, when the network device determines that the codebook parameters for PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2 (for 4 antenna ports, if transform precoder is disabled, maxRank = 2), and the codebook subset for PUSCH transmission in that beam direction is restricted to uncorrelated, the network device can determine that the codebook preconfiguration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 2 below. The TPMI indicator field used to indicate the precoding matrix of PUSCH transmission in that beam direction can indicate TPMI and TRI according to this table. For example, if the TPMI indicator field carries index 1, then TRI = 1 and TPMI = 1; if the TPMI indicator field carries index 11, then TRI = 2 and TPMI = 6. In this table, the number of available TPMI combinations is 12, so the number of bits occupied by the TPMI indicator field can be determined as follows. This indicates rounding up to the nearest integer.

[0074]

[0075] Table 2

[0076] According to the precoding indication method of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information indicates the beam information used by the UE for transmission, indicating two or more beams, and the transmission configuration information includes two or more TPMI indication fields, where each TPMI indication field indicates both TPMI and TRI. Therefore, this single DCI can be used for multi-antenna panel multi-TRP transmission based on a codebook, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0077] Figure 4 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 4 As shown, the method can be executed by a network device and may include the following steps.

[0078] S401, Obtain rank indication information, wherein the rank indication information is used to indicate the TRI used by the UE for PUSCH transmission in each beam direction.

[0079] In some embodiments, the rank indication information is obtained from any of the following: the demodulation reference signal (DMRS) field of a single DCI; the reserved or extended code points of any indication field of a single DCI; the newly added indication fields of a single DCI; and the number of codewords supported by a single DCI.

[0080] The DMRS field of the DCI can indicate the DMRS port information used for PUSCH transmission in each beam direction. For example, if the indicated DMRS port is {0,1} and the corresponding transmission scheme is FDM or SFN transmission, then the DMRS port for PUSCH transmission in each beam direction will use port {0,1}, i.e., TRI is 2. For example, if the indicated DMRS port is {0,1} and the corresponding transmission scheme is SDM transmission, then the DMRS port corresponding to PUSCH transmission in each TCI beam direction can also be determined according to predefined rules. A possible port allocation is that PUSCH transmission in the first beam direction uses DMRS port {0} and the corresponding TRI is 1, while PUSCH transmission in the second beam direction uses DMRS port {1} and the corresponding TRI is 1.

[0081] S402, send a single DCI to the UE, the single DCI including TCI beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields for multi-antenna panel multi-TRP transmission, and each TPMI indication field indicates TPMI according to the TPMI sub-table.

[0082] The TPMI sub-table is determined from the codebook pre-configuration table based on the TRI used for PUSCH transmissions in the corresponding beam direction. The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmissions in the corresponding beam direction and the codebook subset restrictions for PUSCH transmissions in the corresponding beam direction. The number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the codebook pre-configuration table. max Each available TRI is determined based on the codebook parameter configuration of the PUSCH transmission in the corresponding beam direction and the codebook subset constraints of the PUSCH transmission in the corresponding beam direction.

[0083] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission. Each codebook-based PUSCH transmission in each beam direction corresponds to one TPMI indication field; that is, one TPMI indication field can indicate the precoding matrix of a codebook-based PUSCH transmission in one beam direction. The network device can determine the codebook parameter configuration and codebook subset restrictions for PUSCH transmission in each beam direction, thereby determining a codebook pre-configuration table for PUSCH transmission in each beam direction. Furthermore, the network device can obtain the TRI used for PUSCH transmission in each beam direction, thereby determining the TPMI sub-table from the determined codebook pre-configuration table. Each TPMI indication field included in the transmission configuration information carried in the DCI sent by the network device to the UE can carry an index, which is used to indicate TPMI according to the TPMI sub-table. The number of bits occupied by the TPMI indication field is determined based on the maximum value in the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook preconfiguration table.

[0084] The codebook parameter configuration allows for settings such as the number of antenna ports, whether to use transform precoding, and maxRank. The codebook subset restrictions include three types: all, partial and uncorrelated; partial and uncorrelated; and uncorrelated.

[0085] In one example, for PUSCH transmission associated with an antenna panel / TRP / PUSCH transmission timing / TCI beam direction, when the network device determines that the codebook parameters for PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoder used, maxRank = 2 or 3 or 4 (for 4 antenna ports, if transform precoder is disabled, maxRank = 2 or 3 or 4), and the codebook subset for PUSCH transmission in that beam direction is limited to partial and unrelated, the network device can determine that the codebook preconfiguration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 1 above. Furthermore, once the network device obtains the TRI value used for PUSCH transmission in that beam direction, it can determine that the corresponding TPMI sub-table is a subset of the table where TRI is that value. For example, if TRI = 3, the network device can determine that the corresponding TPMI sub-table is a subset of the table where TRI = 3 (3 layers), and the indices in this TPMI sub-table are reordered, as shown in Table 3. Similarly, if TRI = 2, the network device can determine that the corresponding TPMI sub-table is a subset of the table where TRI = 2 (2 layers), and the indices in this TPMI sub-table are reordered, as shown in Table 4. The TPMI indication field of the precoding matrix used to indicate PUSCH transmission in that beam direction can indicate TPMI based on this TPMI sub-table. For example, in Table 3 determined based on TRI = 3, if the TPMI indication field carries index 1, it indicates TPMI = 1; if the TPMI indication field carries index 2, it indicates TPMI = 2.

[0086] In the determined codebook pre-configuration table, TRI values ​​are 1, 2, 3, and 4. When TRI = 1, the number of available TPMI combinations is 12; when TRI = 2, the number of available TPMI combinations is 14; when TRI = 3, the number of available TPMI combinations is 3; and when TRI = 4, the number of available TPMI combinations is 3. Therefore, the number of bits occupied by the TPMI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0087] index codebookSubset=partialAndNonCoherent 0 3layers:TPMI=0 1 3 layers: TPMI = 1 2 3 layers: TPMI = 2 3-15 reserve

[0088] Table 3

[0089] index codebookSubset=partialAndNonCoherent 0 2layers:TPMI=0 1 2 layers: TPMI = 1 2 2 layers: TPMI = 2 3 2 layers: TPMI = 3 4 2 layers: TPMI = 4 5 2 layers: TPMI = 5 6 2 layers: TPMI = 6 7 2 layers: TPMI = 7 8 2 layers: TPMI = 8 9 2 layers: TPMI = 9 10 2 layers: TPMI = 10 11 2 layers: TPMI = 11 12 2 layers: TPMI = 12 13 2 layers: TPMI = 13 14-15 reserve

[0090] Table 4

[0091] As shown above, although the available TPMI combinations in the TPMI sub-table determined by TRI=3 only include three types: 0, 1, and 2, the number of code points in this TPMI sub-table is determined by the maximum value among the number of available TPMI combinations corresponding to all available TRIs in the corresponding codebook pre-configuration table, that is, by the number of available TPMI combinations corresponding to TRI=2, which is 14. Therefore, the number of code points in this TPMI sub-table is 16 bits.

[0092] In some embodiments, for a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent the K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... This indicates rounding up to the nearest integer.

[0093] For example, referring to the example above, for TRI=3, the three code points represent the TPMI values ​​of TRI=3 in the corresponding codebook pre-configuration table, while the remaining 13 bits are reserved bits, as shown in Table 3 above.

[0094] For TRI=2, 14 code points represent the TPMI values ​​of TRI=2 in the corresponding codebook pre-configuration table, while the remaining 2 bits are reserved, as shown in Table 4 above.

[0095] In another example, for a PUSCH transmission in a beam direction, when the network device determines that the codebook parameters for the PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoder, maxRank=2 (for 4 antenna ports, if transform precoder is disabled, maxRank=2), and the codebook subset for the PUSCH transmission in that beam direction is restricted to uncorrelated, the network device can determine that the codebook preconfiguration table for the PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 2 above. Furthermore, once the network device obtains the TRI value used for PUSCH transmission in that beam direction, it can determine that the corresponding TPMI sub-table is a subset of the table where TRI is that value. For example, if TRI = 1, the network device can determine that the corresponding TPMI sub-table is a subset of the table where TRI = 1 (1 layer), and the indices in the TPMI sub-table are reordered, as shown in Table 5. Similarly, if TRI = 2, the network device can determine that the corresponding TPMI sub-table is a subset of the table where TRI = 2 (2 layers), and the indices in the TPMI sub-table are reordered, as shown in Table 6. The TPMI indication field of the precoding matrix used to indicate PUSCH transmission in that beam direction can indicate TPMI based on this TPMI sub-table. For example, in Table 5 determined based on TRI = 1, if the TPMI indication field carries index 1, it indicates TPMI = 1; if the TPMI indication field carries index 2, it indicates TPMI = 2.

[0096] In the determined codebook pre-configuration table, TRI values ​​of 1 and 2 are available. When TRI = 1, the number of available TPMI combinations is 5; when TRI = 2, the number of available TPMI combinations is 7. Therefore, the number of bits occupied by the TPMI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0097] index codebookSubset = NonCoherent 0 1layers:TPMI=0 1 1layers:TPMI=1 2 1 layer: TPMI = 2 3 1 layer: TPMI = 3 4 1 layer: TPMI = 13 5-7 reserve

[0098] Table 5

[0099] index codebookSubset = NonCoherent 0 2layers:TPMI=0 1 2 layers: TPMI = 1 2 2 layers: TPMI = 2 3 2 layers: TPMI = 3 4 2 layers: TPMI = 4 5 2 layers: TPMI = 5 6 2 layers: TPMI = 6 7 reserve

[0100] Table 6

[0101] As shown above, although the available TPMI combinations in the TPMI sub-table determined by TRI=1 only include five types: 0, 1, 2, 3, and 13, the number of code points in this TPMI sub-table is determined by the maximum value among the number of available TPMI combinations corresponding to all available TRIs in the corresponding codebook pre-configuration table, that is, by the number of available TPMI combinations corresponding to TRI=2, which is 7. Therefore, the number of code points in this TPMI sub-table is 8 bits.

[0102] For TRI=1, the 5 code points represent the TPMI values ​​of TRI=1 in the corresponding codebook pre-configuration table, while the remaining 3 bits are reserved, as shown in Table 5 above.

[0103] For TRI=2, the 7 code points represent the TPMI values ​​of TRI=2 in the corresponding codebook pre-configuration table, while the remaining 1 bit is a reserved bit, as shown in Table 6 above.

[0104] According to the precoding indication method of this disclosure, a network device acquires the TRI used for PUSCH transmission in each beam direction of the UE and sends a single DCI carrying TCI beam indication information and transmission configuration information to the UE. The UE performs PUSCH transmission according to the single DCI, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields, wherein each TPMI indication field indicates only TPMI. Therefore, this single DCI can be used for multi-antenna panel multi-TRP transmission based on codebooks, thereby making multi-point cooperative transmission more efficient and effectively improving the reliability and throughput of data transmission.

[0105] Figure 5 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 5 As shown, the method can be executed by a network device and may include the following steps.

[0106] S501, a single DCI is sent to the UE, which includes TCI beam indication information and transmission configuration information. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. The TCI beam indication information indicates two or more beams. The transmission configuration information includes two or more SRI indication fields for multi-antenna panel multi-TRP transmission. Each SRI indication field indicates SRI and TRI according to the SRI pre-configuration table.

[0107] The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table.

[0108] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and this multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission. Each non-codebook-based PUSCH transmission in each beam direction corresponds to one SRI indication field; that is, one SRI indication field can indicate the SRS resources for a non-codebook-based PUSCH transmission in one beam direction. The network device can determine the maximum uplink transmission layer supported by the PUSCH transmission in each beam direction and the number of SRS resources in the allocated SRS resource set for the PUSCH transmission in each beam direction. This allows for the determination of an SRI pre-configuration table for the PUSCH transmission in each beam direction. Each SRI indication field included in the transmission configuration information carried in the DCI sent by the network device to the UE can carry an index, which is used to simultaneously indicate SRI and TRI according to the SRI pre-configuration table. The number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the corresponding SRI pre-configuration table.

[0109] For example, for a PUSCH transmission associated with an antenna panel / TRP / PUSCH transmission timing / TCI beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 4 (L max =4), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 3 (N). SRS When =3), the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 7 below. The SRI indication field used to indicate the SRS resources for PUSCH transmission in that beam direction can indicate the SRI and TRI (implicitly indicated by the number of SRIs) according to this table. For example, if the SRI indication field carries index 1, it indicates TRI = 1 and SRI = 1; if the SRI indication field carries index 6, it indicates TRI = 3 and SRI = 0, 1, 2. In this table, the number of available SRI combinations is 7, so the number of bits occupied by the SRI indication field can be determined as follows: This indicates rounding up to the nearest integer.

[0110] index <![CDATA[SRI(s),N SRS =2]]> index <![CDATA[SRI(s),N SRS =3]]> index <![CDATA[SRI(s),N SRS =4]]> 0 0 0 0 0 0 1 1 1 1 1 1 2 0,1 2 2 2 2 3 reserve 3 0,1 3 3 4 0,2 4 0,1 5 1,2 5 0,2 6 0,1,2 6 0,3 7 reserve 7 1,2 8 1,3 9 2,3 10 0,1,2 11 0,1,3 12 0,2,3 13 1,2,3 14 0,1,2,3 15 reserve

[0111] Table 7

[0112] For example, for PUSCH transmission in another beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 3 (L... max=3), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 4 (N). SRS When =4), the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 8 below. The SRI indication field used to indicate the SRS resources for PUSCH transmission in that beam direction can indicate SRI and TRI according to this table. For example, if the SRI indication field carries index 1, then TRI = 1, SRI = 1; if the SRI indication field carries index 6, then TRI = 2, SRI = 1, 2. In this table, the number of available SRI combinations is 14, so the number of bits occupied by the SRI indication field can be determined as follows: This indicates rounding up to the nearest integer.

[0113]

[0114] Table 8

[0115] In some embodiments, the association between the SRI indication field and the SRS resource set can be predefined or indicated by the SRS resource set indication field in a single DCI.

[0116] Assuming that the TCI beam indication information carried in a single DCI sent by the network device indicates three beams (corresponding to the first, second, and third beam directions respectively), and the transmission configuration information carried in this single DCI includes three SRI indication fields (the first SRI indication field, the second SRI indication field, and the third SRI indication field respectively), in one example, the network device and the UE can predefine that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the first beam direction, that is, the first SRI indication field indicates the SRS resources used for PUSCH transmission in the first beam direction, and the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the second beam direction. The third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction. In another example, the network device can indicate this through the SRS resource set indication field in the single DCI. For example, a new SRS resource set indication field is added to the single DCI, which indicates that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the first beam direction, the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the second beam direction, and the third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction.

[0117] According to the precoding indication method of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. The TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields, where each SRI indication field indicates both SRI and TRI. Therefore, this single DCI can be used for multi-antenna panel multi-TRP transmission based on a codebook, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0118] Figure 6 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 6 As shown, the method can be executed by a network device and may include the following steps.

[0119] S601, Obtain rank indication information, wherein the rank indication information is used to indicate the TRI used by the UE for PUSCH transmission in each beam direction.

[0120] In some embodiments, the rank indication information is obtained from any of the following: the demodulation reference signal (DMRS) field of a single DCI; the reserved or extended code points of any indication field of a single DCI; the newly added indication fields of a single DCI; and the number of codewords supported by a single DCI.

[0121] The DMRS field of the DCI can indicate the DMRS port information used for PUSCH transmission in each beam direction. For example, if the indicated DMRS port is {0,1} and the corresponding transmission scheme is FDM or SFN transmission, then the DMRS port for PUSCH transmission in each beam direction will use port {0,1}, i.e., TRI is 2. For example, if the indicated DMRS port is {0,1} and the corresponding transmission scheme is SDM transmission, then the DMRS port corresponding to PUSCH transmission in each TCI beam direction can also be determined according to predefined rules. A possible port allocation is that PUSCH transmission in the first beam direction uses DMRS port {0} and the corresponding TRI is 1, while PUSCH transmission in the second beam direction uses DMRS port {1} and the corresponding TRI is 1.

[0122] S602, a single DCI is sent to the UE, the single DCI including TCI beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields for multi-antenna panel multi-TRP transmission, and each SRI indication field indicates an SRI according to an SRI sub-table.

[0123] The SRI sub-table is determined from the codebook pre-configuration table based on the TRI used for PUSCH transmissions in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the SRI pre-configuration table. max Each available TRI is determined based on the smaller of the maximum number of uplink transmission layers supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction.

[0124] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and this multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission. Each non-codebook-based PUSCH transmission in each beam direction corresponds to one SRI indication field; that is, one SRI indication field can indicate the SRS resources of a non-codebook-based PUSCH transmission in one beam direction. The network device can determine the maximum number of uplink transmission layers supported by PUSCH transmissions in each beam direction and the number of SRS resources in the SRS resource set allocated to PUSCH transmissions in each beam direction. This allows it to determine the SRI pre-configuration table for PUSCH transmissions in each beam direction. Furthermore, the network device can obtain the TRI used for PUSCH transmissions in each beam direction, thereby determining the SRI sub-table from the determined SRI pre-configuration table. Each SRI indication field included in the transmission configuration information sent by the network device to the UE can carry an index, which is used to indicate the SRI according to the SRI sub-table. The number of bits occupied by the SRI indication field is determined based on the maximum value among the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table.

[0125] In one example, for a PUSCH transmission in a beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 4 (L... max =4), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 3 (N). SRS When TRI = 3, the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 7 above. Furthermore, if the network device obtains the TRI value used for PUSCH transmission in that beam direction, it can determine that the corresponding SRI sub-table is a subset of the table where TRI is that value. For example, if TRI = 3, the network device can determine that the corresponding SRI sub-table is a subset of the table where TRI = 3 (3 SRIs), and the indexes in this SRI sub-table are reordered, as shown in Table 9. Similarly, if TRI = 2, the network device can determine that the corresponding SRI sub-table is a subset of the table where TRI = 2 (2 SRIs), and the indexes in this SRI sub-table are reordered, as shown in Table 10. The SRI indication field used to indicate the SRS resources transmitted in the direction of the beam can indicate the SRI according to the SRI sub-table. For example, in Table 10 determined according to TRI=2, if the SRI indication field carries index 1, it indicates SRI=0,2; if the SRI indication field carries index 2, it indicates SRI=1,2.

[0126] In the determined SRI pre-configuration table, the available TRI values ​​are greater than or equal to 1 and less than or equal to L. max With N SRS The smaller of (in this example, min{L) max N SRS} = 3), that is, 1, 2, 3. When TRI = 1, the number of available SRI combinations is 3; when TRI = 2, the number of available SRI combinations is 3; when TRI = 3, the number of available SRI combinations is 1. Therefore, the number of bits occupied by the TPMI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0127] index <![CDATA[SRI(s),N SRS =3]]> 0 0,1,2 1-3 reserve

[0128] Table 9

[0129] index <![CDATA[SRI(s),N SRS =3]]> 0 0,1 1 0,2 2 1,2 3 reserve

[0130] Table 10

[0131] As shown above, although the available SRI combinations in the SRI sub-table determined by TRI=3 only include {0,1,2}, the number of code points in this SRI sub-table is determined by the maximum value among the number of available SRI combinations corresponding to all available TRIs in the corresponding codebook pre-configuration table, that is, by the number of available SRI combinations corresponding to TRI=2, which is 3. Therefore, the number of code points in this SRI sub-table is 4 bits.

[0132] In some embodiments, for a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent the K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M²-K²) code points are reserved values, where M² is... This indicates rounding up to the nearest integer.

[0133] For example, referring to the example above, for TRI=3, one code point represents the SRI value of TRI=3 in the corresponding codebook pre-configuration table, while the remaining 3 bits are reserved bits, as shown in Table 9 above.

[0134] For TRI=2, the three code points represent the SRI values ​​of TRI=2 in the corresponding codebook pre-configuration table, while the remaining 1 bit is a reserved bit, as shown in Table 10 above.

[0135] In another example, for a PUSCH transmission in a beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 3 (L... max =3), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 4 (N). SRS When TRI = 4), the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 8 above. Furthermore, if the network device obtains the TRI value used for PUSCH transmission in that beam direction, it can determine that the corresponding SRI sub-table is a subset of the table where TRI is that value. For example, if TRI = 3, the network device can determine that the corresponding SRI sub-table is a subset of the table where TRI = 3 (3 SRIs), and the indexes in this SRI sub-table are reordered, as shown in Table 11. Similarly, if TRI = 2, the network device can determine that the corresponding SRI sub-table is a subset of the table where TRI = 2 (2 SRIs), and the indexes in this SRI sub-table are reordered, as shown in Table 12. The SRI indication field used to indicate the SRS resources transmitted in the direction of the beam can indicate the SRI according to the SRI sub-table. For example, in Table 12 determined according to TRI=2, if the SRI indication field carries index 1, it indicates SRI=0,2; if the SRI indication field carries index 2, it indicates SRI=1,2.

[0136] In the determined SRI pre-configuration table, the available TRI values ​​are greater than or equal to 1 and less than or equal to L. max With N SRS The smaller of (in this example, min{L) max N SRS} = 3), i.e., 1, 2, 3. When TRI = 1, the number of available SRI combinations is 3; when TRI = 2, the number of available SRI combinations is 6; and when TRI = 3, the number of available SRI combinations is 4. Therefore, the number of bits occupied by the SRI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0137] index <![CDATA[SRI(s),N SRS =4]]> 0 0,1,2 1 0,1,3 2 0,2,3 3 1,2,3 4-7 reserve

[0138] Table 11

[0139] index <![CDATA[SRI(s),N SRS =4]]> 0 0,1 1 0,2 2 0,3 3 1,2 4 1,3 5 2,3 6-7 reserve

[0140] Table 12

[0141] As shown above, although the available SRI combinations in the SRI sub-table determined by TRI=3 only include {0,1,2}, {0,1,3}, and {0,2,

[0142] There are four types: {3}, {1,2,3}. However, the number of code points in this SRI sub-table is determined by the maximum value among the number of available SRI combinations corresponding to all available TRIs in the corresponding codebook pre-configuration table. That is, it is determined by the number of available SRI combinations corresponding to TRI=2, which is 6. Therefore, the number of code points in this SRI sub-table is 8 bits.

[0143] For TRI=3, the four code points represent the SRI values ​​of TRI=3 in the corresponding codebook pre-configuration table, while the remaining four bits are reserved, as shown in Table 11 above.

[0144] For TRI=2, the 6 code points represent the SRI values ​​of TRI=2 in the corresponding codebook pre-configuration table, while the remaining 2 bits are reserved, as shown in Table 12 above.

[0145] In some embodiments, the association between the SRI indication field and the SRS resource set can be predefined or indicated by the SRS resource set indication field in a single DCI.

[0146] Assuming that the TCI beam indication information carried in a single DCI sent by the network device indicates three beams (corresponding to the first, second, and third beam directions respectively), and the transmission configuration information carried in this single DCI includes three SRI indication fields (the first SRI indication field, the second SRI indication field, and the third SRI indication field respectively), in one example, the network device and the UE can predefine that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the first beam direction, that is, the first SRI indication field indicates the SRS resources used for PUSCH transmission in the first beam direction, and the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the second beam direction. The third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction. In another example, the network device can indicate this through the SRS resource set indication field in the single DCI. For example, a new SRS resource set indication field is added to the single DCI, which indicates that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the first beam direction, the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the second beam direction, and the third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction.

[0147] According to the precoding indication method of this disclosure, the network device obtains the TRI used for PUSCH transmission in each beam direction of the UE, and sends a single DCI carrying TCI beam indication information and transmission configuration information to the UE. The UE performs PUSCH transmission according to the single DCI, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields, wherein each SRI indication field indicates only an SRI. Therefore, multi-antenna panel multi-TRP transmission based on codebooks can be used in this single DCI, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0148] Figure 7 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 7 As shown, the method can be executed by the UE and may include the following steps.

[0149] S701, receive a single DCI sent by the network device. This single DCI carries TCI beam indication information and transmission configuration information. The TCI beam indication information indicates the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel, single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel, multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field.

[0150] In this embodiment, the DCI includes TCI beam indication information and transmission configuration information. Depending on whether the TCI beam indication information indicates one beam or two or more beams, the transmission configuration information can dynamically include one set of information indication fields or two or more sets of information indication fields. When the transmission configuration information includes one set of information indication fields, the DCI can be used for single-antenna panel single-TRP transmission. When the transmission configuration information includes two or more sets of information indication fields, the DCI can be used for multi-antenna panel multi-TRP transmission. Each set of information indication fields can be at least one of SRI indication fields and TPMI indication fields, but this application is not limited to this; each set of information indication fields may also include other information indication fields besides SRI and TPMI indication fields.

[0151] In some embodiments, the TCI beam indication information in a single DCI indicates a beam and the transmission configuration information may include a TPMI indication field, wherein the TPMI indication field is used to indicate the precoding matrix of PUSCH transmission in the direction of the beam, then the single DCI is used for single antenna panel single TRP transmission, and the single antenna panel single TRP transmission is codebook-based PUSCH transmission.

[0152] In some embodiments, the TCI beam indication information in a single DCI indicates two or more beams, and the transmission configuration information may include two or more TPMI indication fields, wherein each TPMI indication field is used to indicate the precoding matrix of the PUSCH transmission in the corresponding beam direction. In this case, the single DCI is used for multi-antenna panel multi-TRP transmission, and the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission. For each PUSCH transmission in the beam direction, a TPMI indication field indicates the precoding matrix used in that PUSCH transmission.

[0153] In some embodiments, the TCI beam indication information in a single DCI indicates a beam and the transmission configuration information may include an SRI indication field, wherein the SRI indication field is used to indicate one or more SRS resources carrying precoded information in the SRS resource set to which the PUSCH transmission in the beam direction is allocated. In this case, the single DCI is used for single antenna panel single TRP transmission, and the single antenna panel single TRP transmission is a non-codebook-based PUSCH transmission.

[0154] In some embodiments, the TCI beam indication information in a single DCI indicates two or more beams, and the transmission configuration information may include two or more SRI indication fields, wherein each SRI indication field is used for one or more SRS resources carrying precoded information in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. In this case, the single DCI is used for multi-antenna panel multi-TRP transmission, and the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission. For each PUSCH transmission in the beam direction, one SRI indication field indicates one or more SRS resources selected from the SRS resource set allocated to that PUSCH transmission.

[0155] S702 performs PUSCH transmission based on a single DCI.

[0156] After receiving the single DCI, the UE performs PUSCH transmission based on the single DCI.

[0157] In some embodiments, when the TCI beam indication information carried by the single DCI indicates a beam and the transmission configuration information includes an SRI indication field, the UE performs non-codebook-based single antenna panel single TRP transmission according to the single DCI.

[0158] In some embodiments, when the TCI beam indication information carried by the single DCI indicates two or more beams and the transmission configuration information includes two or more SRI indication fields, the UE performs non-codebook-based multi-antenna panel multi-TRP transmission according to the single DCI.

[0159] In some embodiments, when the TCI beam indication information carried by the single DCI indicates a beam and the transmission configuration information includes a TPMI indication field, the UE performs single-antenna panel single-TRP transmission based on the codebook according to the single DCI.

[0160] In some embodiments, when the TCI beam indication information carried by the single DCI indicates two or more beams and the transmission configuration information includes two or more TPMI indication fields, the UE performs codebook-based multi-antenna panel multi-TRP transmission according to the single DCI.

[0161] According to the precoding indication method of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information indicates the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field. The information indication fields included in the transmission configuration information of the single DCI can be dynamically applied to single-antenna panel single-TRP transmission and multi-antenna panel multi-TRP transmission, thereby enabling switching between single-TRP and multi-TRP to make multi-point cooperative transmission more efficient, thus effectively improving the reliability and throughput of data transmission.

[0162] Figure 8 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 8 As shown, the method can be executed by the UE and may include the following steps.

[0163] S801, receive a single DCI sent by the network device, the single DCI carrying TCI beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields for multi-antenna panel multi-TRP transmission, and each TPMI indication field indicates TPMI and TRI according to the codebook pre-configuration table.

[0164] The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the corresponding codebook subset restrictions for PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is determined based on the number of available TPMI combinations in the codebook pre-configuration table.

[0165] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and this multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission. Each codebook-based PUSCH transmission in each beam direction corresponds to one TPMI indication field; that is, one TPMI indication field can indicate the precoding matrix of a codebook-based PUSCH transmission in one beam direction. The network device can determine the codebook parameter configuration and codebook subset restrictions for PUSCH transmission in each beam direction, thereby determining the codebook pre-configuration table for PUSCH transmission in each beam direction. Each TPMI indication field included in the transmission configuration information carried in the DCI sent by the network device to the UE can carry an index, which is used to simultaneously indicate TPMI and TRI according to the codebook pre-configuration table. The number of bits occupied by each TPMI indication field is determined according to the number of available TPMI combinations in the corresponding codebook pre-configuration table.

[0166] The codebook parameter configuration allows for settings such as the number of antenna ports, whether to use transform precoding, and maxRank. The codebook subset restrictions include three types: all, partial and uncorrelated; partial and uncorrelated; and uncorrelated.

[0167] For example, for a PUSCH transmission in a beam direction, when the network device determines that the codebook parameters for the PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2, 3, or 4 (if the transform precoder is disabled, maxRank = 2, 3, or 4), and the codebook subset for the PUSCH transmission in that beam direction is limited to partial and uncorrelated, the network device can determine that the codebook preconfiguration table for the PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 1 above. The TPMI indicator field used to indicate the precoding matrix of the PUSCH transmission in that beam direction can indicate TPMI and TRI according to this table. For example, if the TPMI indicator field carries index 1, then it indicates TRI = 1 and TPMI = 1; if the TPMI indicator field carries index 11, then it indicates TRI = 4 and TPMI = 0. In this table, the number of available TPMI combinations is 32, so the number of bits occupied by the TPMI indicator field can be determined as follows. This indicates rounding up to the nearest integer.

[0168] For example, for PUSCH transmission in another beam direction, when the network device determines that the codebook parameters for PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2 (for 4 antenna ports, if transform precoder is disabled, maxRank = 2), and the codebook subset for PUSCH transmission in that beam direction is restricted to uncorrelated, the network device can determine that the codebook preconfiguration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 2 above. The TPMI indicator field used to indicate the precoding matrix of PUSCH transmission in that beam direction can indicate TPMI and TRI according to this table. For example, if the TPMI indicator field carries index 1, then it indicates TRI = 1 and TPMI = 1; if the TPMI indicator field carries index 11, then it indicates TRI = 2 and TPMI = 6. In this table, the number of available TPMI combinations is 12, so the number of bits occupied by the TPMI indicator field can be determined as follows. This indicates rounding up to the nearest integer.

[0169] S802, based on the TPMI and TRI indicated in each of two or more TPMI indication fields, and the codebook preconfiguration table, determines the precoding matrix for PUSCH transmission in each beam direction.

[0170] The UE can determine the codebook parameter configuration and codebook subset restrictions for PUSCH transmission in each beam direction, thereby determining the codebook pre-configuration table for PUSCH transmission in each beam direction. After receiving the single DCI, the UE determines the precoding matrix for PUSCH transmission in each beam direction based on the transmission configuration information carried in the single DCI, including the TPMI and TRI indicated in each TPMI indication field, and the codebook pre-configuration table.

[0171] For example, the UE receives TCI beam indication information carried in the DCI sent by the network device, indicating two beams, namely the first beam direction and the second beam direction, and the transmission configuration information includes two TPMI indication fields, namely the first TPMI indication field and the second TPMI indication field, wherein the first TPMI indication field carries index 1 and the second TPMI indication field indicates index 11. When the UE determines that the codebook parameters for PUSCH transmission in the first beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2, 3, or 4 (if transform precoder is disabled, maxRank = 2, 3, or 4), and the codebook subset for PUSCH transmission in the first beam direction is restricted to partial and uncorrelated, and when the UE determines that the codebook parameters for PUSCH transmission in the second beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2 (if transform precoder is disabled, maxRank = 2), and the codebook subset for PUSCH transmission in the second beam direction is restricted to uncorrelated, then the UE determines that the codebook preconfiguration table for PUSCH transmission in the first beam direction is the table corresponding to the bold text in Table 1 above, and the codebook preconfiguration table for PUSCH transmission in the second beam direction is the table corresponding to the bold text in Table 2 above. Then, the UE can determine the precoding matrix for PUSCH transmission in the first beam direction as a precoding matrix indicated by TRI=1 and TPMI=1 based on the first TPMI indication field carrying index 1 and the codebook preconfiguration table for PUSCH transmission in the first beam direction, and determine the precoding matrix for PUSCH transmission in the second beam direction as a precoding matrix indicated by TRI=2 and TPMI=6 based on the second TPMI indication field carrying index 11 and the codebook preconfiguration table for PUSCH transmission in the second beam direction.

[0172] S803 performs codebook-based PUSCH transmission in each beam direction according to the corresponding precoding matrix.

[0173] After determining the precoding matrix for PUSCH transmission in each beam direction, the UE performs codebook-based PUSCH transmission using the determined precoding matrix in each beam direction.

[0174] According to the precoding indication method of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information indicates the beam information used by the UE for transmission, indicating two or more beams, and the transmission configuration information includes two or more TPMI indication fields, where each TPMI indication field indicates both TPMI and TRI. Therefore, this single DCI can be used for multi-antenna panel multi-TRP transmission based on a codebook, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0175] Figure 9 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 9 As shown, the method can be executed by the UE and may include the following steps.

[0176] S901, receive a single DCI sent by the network device, the single DCI including TCI beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields for multi-antenna panel multi-TRP transmission, and each TPMI indication field indicates TPMI according to the TPMI sub-table.

[0177] The TPMI sub-table is determined from the codebook pre-configuration table based on the TRI used for PUSCH transmissions in the corresponding beam direction. The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmissions in the corresponding beam direction and the codebook subset restrictions for PUSCH transmissions in the corresponding beam direction. The number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the codebook pre-configuration table. max Each available TRI is determined based on the codebook parameter configuration of the PUSCH transmission in the corresponding beam direction and the codebook subset constraints of the PUSCH transmission in the corresponding beam direction.

[0178] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission. Each codebook-based PUSCH transmission in each beam direction corresponds to one TPMI indication field; that is, one TPMI indication field can indicate the precoding matrix of a codebook-based PUSCH transmission in one beam direction. The network device can determine the codebook parameter configuration and codebook subset restrictions for PUSCH transmission in each beam direction, thereby determining a codebook pre-configuration table for PUSCH transmission in each beam direction. Furthermore, the network device can obtain the TRI used for PUSCH transmission in each beam direction, thereby determining the TPMI sub-table from the determined codebook pre-configuration table. Each TPMI indication field included in the transmission configuration information carried in the DCI sent by the network device to the UE can carry an index, which is used to indicate TPMI according to the TPMI sub-table. The number of bits occupied by the TPMI indication field is determined based on the maximum value in the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook preconfiguration table.

[0179] The codebook parameter configuration allows for settings such as the number of antenna ports, whether to use transform precoding, and maxRank. The codebook subset restrictions include three types: all, partial and uncorrelated; partial and uncorrelated; and uncorrelated.

[0180] For example, for a PUSCH transmission in a beam direction, when the network device determines that the codebook parameters for the PUSCH transmission in that beam direction are configured as follows: 4 antenna ports, no transform precoder used, maxRank = 2 or 3 or 4 (for 4 antenna ports, if transform precoder is disabled, maxRank = 2 or 3 or 4), and the codebook subset for the PUSCH transmission in that beam direction is limited to partial and unrelated, the network device can determine that the codebook preconfiguration table for the PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 1. Furthermore, once the network device obtains the TRI value used for PUSCH transmission in that beam direction, it can determine that the corresponding TPMI sub-table is a subset of the table where TRI is that value. For example, if TRI = 3, the network device can determine that the corresponding TPMI sub-table is a subset of the table where TRI = 3 (3 layers), and the indices in this TPMI sub-table are reordered, as shown in Table 3. Similarly, if TRI = 2, the network device can determine that the corresponding TPMI sub-table is a subset of the table where TRI = 2 (2 layers), and the indices in this TPMI sub-table are reordered, as shown in Table 4. The TPMI indication field of the precoding matrix used to indicate PUSCH transmission in that beam direction can indicate TPMI based on this TPMI sub-table. For example, in Table 3 determined based on TRI = 3, if the TPMI indication field carries index 1, it indicates TPMI = 1; if the TPMI indication field carries index 2, it indicates TPMI = 2.

[0181] In the determined codebook pre-configuration table, TRI values ​​are 1, 2, 3, and 4. When TRI = 1, the number of available TPMI combinations is 12; when TRI = 2, the number of available TPMI combinations is 14; when TRI = 3, the number of available TPMI combinations is 3; and when TRI = 4, the number of available TPMI combinations is 3. Therefore, the number of bits occupied by the TPMI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0182] As shown above, although the available TPMI combinations in the TPMI sub-table determined by TRI=3 only include three types: 0, 1, and 2, the number of code points in this TPMI sub-table is determined by the maximum value among the number of available TPMI combinations corresponding to all available TRIs in the corresponding codebook pre-configuration table, that is, by the number of available TPMI combinations corresponding to TRI=2, which is 14. Therefore, the number of code points in this TPMI sub-table is 16 bits.

[0183] In some embodiments, for a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent the K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... This indicates rounding up to the nearest integer.

[0184] For example, referring to the example above, for TRI=3, the three code points represent the TPMI values ​​of TRI=3 in the corresponding codebook pre-configuration table, while the remaining 13 bits are reserved bits, as shown in Table 3 above.

[0185] For TRI=2, 14 code points represent the TPMI values ​​of TRI=2 in the corresponding codebook pre-configuration table, while the remaining 2 bits are reserved, as shown in Table 4 above.

[0186] S902, based on the TPMI indicated in each of two or more TPMI indication fields and the TPMI sub-table, determine the precoding matrix for PUSCH transmission in each beam direction.

[0187] The UE can determine the codebook parameter configuration and codebook subset restrictions for PUSCH transmission in each beam direction, thereby determining the codebook pre-configuration table for PUSCH transmission in each beam direction. Furthermore, based on the TRI used for PUSCH transmission in each beam direction, the UE can determine the TPMI sub-table for PUSCH transmission in each beam direction from the codebook pre-configuration table. Upon receiving the single DCI, the UE determines the precoding matrix for PUSCH transmission in each beam direction based on the TPMI indicated in each TPMI indication field and the TPMI sub-table, which are included in the transmission configuration information carried in the single DCI.

[0188] For example, the UE receives TCI beam indication information carried in the DCI sent by the network device, indicating two beams, namely the first beam direction and the second beam direction, and the transmission configuration information includes two TPMI indication fields, namely the first TPMI indication field and the second TPMI indication field, wherein the first TPMI indication field carries index 1 and the second TPMI indication field indicates index 2. When the UE determines that the codebook parameters for PUSCH transmission in the first beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2, 3, or 4 (if transform precoder is disabled, maxRank = 2, 3, or 4), and the codebook subset for PUSCH transmission in the first beam direction is restricted to partial and uncorrelated, and when the UE determines that the codebook parameters for PUSCH transmission in the second beam direction are configured as follows: 4 antenna ports, no transform precoding, maxRank = 2 (if transform precoder is disabled, maxRank = 2), and the codebook subset for PUSCH transmission in the second beam direction is restricted to uncorrelated, then the UE determines that the codebook preconfiguration table for PUSCH transmission in the first beam direction is the table corresponding to the bold text in Table 1 above, and the codebook preconfiguration table for PUSCH transmission in the second beam direction is the table corresponding to the bold text in Table 2 above. Then, the UE can determine the TPMI sub-table for PUSCH transmission in the first beam direction (Table 3 above) from the corresponding codebook pre-configuration table based on TRI=3 used for PUSCH transmission in the first beam direction, and determine the TPMI sub-table for PUSCH transmission in the second beam direction (Table 5 above) from the corresponding codebook pre-configuration table based on TRI=1 used for PUSCH transmission in the second beam direction. The UE can determine the precoding matrix for PUSCH transmission in the first beam direction (TPMI=1) based on index 1 carried in the first TPMI indication field and the codebook pre-configuration table for PUSCH transmission in the first beam direction, and determine the precoding matrix for PUSCH transmission in the second beam direction (TPMI=2) based on index 2 carried in the second TPMI indication field and the codebook pre-configuration table for PUSCH transmission in the second beam direction.

[0189] S903 performs codebook-based PUSCH transmission in each beam direction according to the corresponding precoding matrix.

[0190] After determining the precoding matrix for PUSCH transmission in each beam direction, the UE performs codebook-based PUSCH transmission using the determined precoding matrix in each beam direction.

[0191] According to the precoding indication method of this disclosure, a network device acquires the TRI used for PUSCH transmission in each beam direction of the UE and sends a single DCI carrying TCI beam indication information and transmission configuration information to the UE. The UE performs PUSCH transmission according to the single DCI, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more TPMI indication fields, wherein each TPMI indication field indicates only TPMI. Therefore, this single DCI can be used for multi-antenna panel multi-TRP transmission based on codebooks, thereby making multi-point cooperative transmission more efficient and effectively improving the reliability and throughput of data transmission.

[0192] Figure 10 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 10 As shown, the method can be executed by the UE and may include the following steps.

[0193] S1001, Receive a single DCI sent by the network device. The single DCI includes TCI beam indication information and transmission configuration information. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. The TCI beam indication information indicates two or more beams. The transmission configuration information includes two or more SRI indication fields for multi-antenna panel multi-TRP transmission. Each SRI indication field indicates SRI and TRI according to the SRI pre-configuration table.

[0194] The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table.

[0195] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and this multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission. Each non-codebook-based PUSCH transmission in each beam direction corresponds to one SRI indication field; that is, one SRI indication field can indicate the SRS resources for a non-codebook-based PUSCH transmission in one beam direction. The network device can determine the maximum uplink transmission layer supported by the PUSCH transmission in each beam direction and the number of SRS resources in the allocated SRS resource set for the PUSCH transmission in each beam direction. This allows for the determination of an SRI pre-configuration table for the PUSCH transmission in each beam direction. Each SRI indication field included in the transmission configuration information carried in the DCI sent by the network device to the UE can carry an index, which is used to simultaneously indicate SRI and TRI according to the SRI pre-configuration table. The number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the corresponding SRI pre-configuration table.

[0196] For example, for a PUSCH transmission in a beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 4 (L... max =4), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 3 (N). SRS When =3), the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 7 above. The SRI indication field used to indicate the SRS resources for PUSCH transmission in that beam direction can indicate the SRI and TRI (implicitly indicated by the number of SRIs) according to this table. For example, if the SRI indication field carries index 1, it indicates TRI = 1 and SRI = 1; if the SRI indication field carries index 6, it indicates TRI = 3 and SRI = 0, 1, 2. In this table, the number of available SRI combinations is 7, so the number of bits occupied by the SRI indication field can be determined as follows: This indicates rounding up to the nearest integer.

[0197] For example, for PUSCH transmission in another beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 3 (L... max =3), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 4 (N). SRSWhen =4), the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 8. The SRI indication field used to indicate the SRS resources for PUSCH transmission in that beam direction can indicate SRI and TRI according to this table. For example, if the SRI indication field carries index 1, then TRI = 1 and SRI = 1; if the SRI indication field carries index 6, then TRI = 2 and SRI = 1, 2. In this table, the number of available SRI combinations is 14, so the number of bits occupied by the SRI indication field can be determined as follows: This indicates rounding up to the nearest integer.

[0198] S1002, based on the SRI and TRI indicated in each of two or more SRI indication fields and the SRI pre-configuration table, determine the SRS resources for PUSCH transmission in each beam direction.

[0199] The UE can determine the maximum uplink transmission layer supported by PUSCH transmission in each beam direction and the number of SRS resources in the SRS resource set allocated to PUSCH transmission in each beam direction, thereby determining the SRI pre-configuration table for PUSCH transmission in each beam direction. After receiving the single DCI, the UE determines the SRS resources for PUSCH transmission in each beam direction based on the SRI and TRI indicated in each SRI indication field of the transmission configuration information carried in the single DCI, as well as the SRI pre-configuration table.

[0200] For example, the UE receives TCI beam indication information carried in the DCI sent by the network device, indicating two beams, namely the first beam direction and the second beam direction. The transmission configuration information includes two SRI indication fields, namely the first SRI indication field and the second SRI indication field. The first SRI indication field carries index 6, and the second SRI indication field indicates index 1. When the UE determines that the maximum uplink transmission layer supported by PUSCH transmission in the first beam direction is 4 (L... max =4), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in the first beam direction is 3 (N). SRS =3), and the UE determines that the maximum number of uplink transmission layers supported by the PUSCH transmission in the second beam direction is 3 (L max =3), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in the second beam direction is 4 (N). SRSWhen = 4), the UE determines that the SRI pre-configuration table for PUSCH transmission in the first beam direction is the table corresponding to the bold text in Table 7 above, and the codebook pre-configuration table for PUSCH transmission in the second beam direction is the table corresponding to the bold text in Table 8 above. Then, the UE can determine the SRS resource for PUSCH transmission in the first beam direction as the SRS resource indicated by TRI = 3, SRI = 0, 1, 2 based on the first SRI indication field carrying index 6 and the SRI pre-configuration table for PUSCH transmission in the first beam direction, and determine the SRS resource for PUSCH transmission in the second beam direction as the SRS resource indicated by TRI = 1, SRI = 1 based on the second SRI indication field carrying index 1 and the SRI pre-configuration table for PUSCH transmission in the second beam direction.

[0201] S1003 uses the precoded information carried by the corresponding SRS resources in each beam direction to perform non-codebook-based PUSCH transmission.

[0202] After determining the SRS resources for PUSCH transmission in each beam direction, the UE uses the precoding information carried by the determined SRS resources to perform non-codebook-based PUSCH transmission in each beam direction.

[0203] In some embodiments, the association between the SRI indication field and the SRS resource set can be predefined or indicated by the SRS resource set indication field in a single DCI.

[0204] Assuming that the TCI beam indication information carried in a single DCI sent by the network device indicates three beams (corresponding to the first, second, and third beam directions respectively), and the transmission configuration information carried in this single DCI includes three SRI indication fields (the first SRI indication field, the second SRI indication field, and the third SRI indication field respectively), in one example, the network device and the UE can predefine that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the first beam direction, that is, the first SRI indication field indicates the SRS resources used for PUSCH transmission in the first beam direction, and the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the second beam direction. The third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction. In another example, the network device can indicate this through the SRS resource set indication field in the single DCI. For example, a new SRS resource set indication field is added to the single DCI, which indicates that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the first beam direction, the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the second beam direction, and the third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction.

[0205] According to the precoding indication method of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. The TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields, where each SRI indication field indicates both SRI and TRI. Therefore, this single DCI can be used for multi-antenna panel multi-TRP transmission based on a codebook, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0206] Figure 11 A flowchart illustrating a precoding instruction method according to an embodiment of the present disclosure is shown. Figure 11 As shown, the method can be executed by a network device and may include the following steps.

[0207] S1101, receive a single DCI sent by the network device, the single DCI including TCI beam indication information and transmission configuration information, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields for multi-antenna panel multi-TRP transmission, and each SRI indication field indicates an SRI according to an SRI sub-table.

[0208] The SRI sub-table is determined from the codebook pre-configuration table based on the TRI used for PUSCH transmissions in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the SRI pre-configuration table. max Each available TRI is determined based on the smaller of the maximum number of uplink transmission layers supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction.

[0209] In this embodiment, the TCI beam indication information carried in a single DCI sent by the network device to the UE indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields. This single DCI is used for multi-antenna panel multi-TRP transmission, and this multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission. Each non-codebook-based PUSCH transmission in each beam direction corresponds to one SRI indication field; that is, one SRI indication field can indicate the SRS resources of a non-codebook-based PUSCH transmission in one beam direction. The network device can determine the maximum number of uplink transmission layers supported by PUSCH transmissions in each beam direction and the number of SRS resources in the SRS resource set allocated to PUSCH transmissions in each beam direction. This allows it to determine the SRI pre-configuration table for PUSCH transmissions in each beam direction. Furthermore, the network device can obtain the TRI used for PUSCH transmissions in each beam direction, thereby determining the SRI sub-table from the determined SRI pre-configuration table. Each SRI indication field included in the transmission configuration information sent by the network device to the UE can carry an index, which is used to indicate the SRI according to the SRI sub-table. The number of bits occupied by the SRI indication field is determined based on the maximum value among the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table.

[0210] For example, for a PUSCH transmission in a beam direction, when the network device determines that the maximum uplink transmission layer supported by the PUSCH transmission in that beam direction is 4 (L... max =4), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in this beam direction is 4 (N). SRS When TRI = 4), the network device can determine that the SRI pre-configuration table for PUSCH transmission in that beam direction is the table corresponding to the bold text in Table 7. Furthermore, if the network device obtains the TRI value used for PUSCH transmission in that beam direction, it can determine that the corresponding SRI sub-table is a subset of the table where TRI is that value. For example, if TRI = 3, the network device can determine that the corresponding SRI sub-table is a subset of the table where TRI = 3 (3 SRIs), and the indexes in this SRI sub-table are reordered, as shown in Table 9. Similarly, if TRI = 2, the network device can determine that the corresponding SRI sub-table is a subset of the table where TRI = 2 (2 SRIs), and the indexes in this SRI sub-table are reordered, as shown in Table 10. The SRI indication field used to indicate the SRS resources transmitted in the direction of the beam can indicate the SRI according to the SRI sub-table. For example, in Table 9 determined according to TRI=3, if the SRI indication field carries index 1, it indicates SRI=0,1,3; if the SRI indication field carries index 2, it indicates SRI=0,2,3.

[0211] In the determined SRI pre-configuration table, the available TRI values ​​are greater than or equal to 1 and less than or equal to L. max With N SRS The smaller of the two (in this example, L) max =N SRS =4), that is, 1, 2, 3, 4. When TRI=1, the number of available SRI combinations is 4; when TRI=2, the number of available SRI combinations is 6; when TRI=3, the number of available SRI combinations is 4; and when TRI=4, the number of available SRI combinations is 1. Therefore, the number of bits occupied by the SRI indicator field can be determined as follows: This indicates rounding up to the nearest integer.

[0212] As shown above, although the available SRI combinations in the SRI sub-table determined by TRI=3 only include four types: 0, 1, 2; 0, 1, 3; 0, 2, 3; 1, 2, 3, the number of code points in this SRI sub-table is determined by the maximum value among the number of available SRI combinations corresponding to all available TRIs in the corresponding codebook pre-configuration table, that is, by the number of available SRI combinations corresponding to TRI=2, which is 6. Therefore, the number of code points in this SRI sub-table is 8 bits.

[0213] In some embodiments, for a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent the K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M²-K²) code points are reserved values, where M² is... This indicates rounding up to the nearest integer.

[0214] For example, referring to the example above, for TRI=3, the four code points represent the SRI values ​​of TRI=3 in the corresponding codebook pre-configuration table, while the remaining four bits are reserved, as shown in Table 9 above.

[0215] For TRI=2, the 6 code points represent the SRI values ​​of TRI=2 in the corresponding codebook pre-configuration table, while the remaining 2 bits are reserved bits, as shown in Table 10 above.

[0216] S1102, based on the SRI indicated in each of two or more SRI indication fields and the SRI sub-table, determine the SRS resources for PUSCH transmission in each beam direction.

[0217] The UE can determine the maximum uplink transmission layer supported by the PUSCH transmission in each beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in each beam direction. This allows it to determine the SRI pre-configuration table for the PUSCH transmission in each beam direction. Furthermore, based on the TRI used by the PUSCH transmission in each beam direction, the UE can determine the SRI sub-table for the PUSCH transmission in each beam direction from the SRI pre-configuration table. Upon receiving the single DCI, the UE determines the SRS resources for the PUSCH transmission in each beam direction based on the SRI indicated in each SRI indication field and the SRI sub-table, which are included in the transmission configuration information carried in the single DCI.

[0218] For example, the UE receives TCI beam indication information carried in the DCI sent by the network device, indicating two beams, namely the first beam direction and the second beam direction. The transmission configuration information includes two SRI indication fields, namely the first SRI indication field and the second SRI indication field. The first SRI indication field carries index 2, and the second SRI indication field indicates index 5. When the UE determines that the maximum uplink transmission layer supported by the PUSCH transmission in the first beam direction is 4 (L... max =4), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in the first beam direction is 3 (N). SRS =3), and the UE determines that the maximum number of uplink transmission layers supported by the PUSCH transmission in the second beam direction is 3 (L max=3), and the number of SRS resources in the allocated SRS resource set for PUSCH transmission in the second beam direction is 4 (N). SRS When TRI=4), the UE determines the SRI pre-configuration table for PUSCH transmission in the first beam direction as the table corresponding to the bold text in Table 7 above, and the codebook pre-configuration table for PUSCH transmission in the second beam direction as the table corresponding to the bold text in Table 8 above. Then, the UE can determine the SRI sub-table for PUSCH transmission in the first beam direction from the corresponding codebook pre-configuration table based on TRI=2 used for PUSCH transmission in the first beam direction as Table 10 above, and determine the SRI sub-table for PUSCH transmission in the second beam direction from the corresponding codebook pre-configuration table based on TRI=2 used for PUSCH transmission in the second beam direction as Table 12 above. Then, the UE can determine the SRS resource for PUSCH transmission in the first beam direction as the SRS resource indicated by SRI=1,2 based on the first SRI indication field carrying index 2 and the SRI pre-configuration table for PUSCH transmission in the first beam direction, and determine the SRS resource for PUSCH transmission in the second beam direction as the SRS resource indicated by SRI=2,3 based on the second SRI indication field carrying index 5 and the SRI pre-configuration table for PUSCH transmission in the second beam direction.

[0219] S1103 uses the precoded information carried by the corresponding SRS resources to perform non-codebook-based PUSCH transmission in each beam direction.

[0220] After determining the SRS resources for PUSCH transmission in each beam direction, the UE uses the precoding information carried by the determined SRS resources to perform non-codebook-based PUSCH transmission in each beam direction.

[0221] In some embodiments, the association between the SRI indication field and the SRS resource set can be predefined or indicated by the SRS resource set indication field in a single DCI.

[0222] Assuming that the TCI beam indication information carried in a single DCI sent by the network device indicates three beams (corresponding to the first, second, and third beam directions respectively), and the transmission configuration information carried in this single DCI includes three SRI indication fields (the first SRI indication field, the second SRI indication field, and the third SRI indication field respectively), in one example, the network device and the UE can predefine that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the first beam direction, that is, the first SRI indication field indicates the SRS resources used for PUSCH transmission in the first beam direction, and the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated for PUSCH transmission in the second beam direction. The third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction. In another example, the network device can indicate this through the SRS resource set indication field in the single DCI. For example, a new SRS resource set indication field is added to the single DCI, which indicates that the first SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the first beam direction, the second SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the second beam direction, and the third SRI indication field indicates the selection of SRS resources from the SRS resource set allocated to PUSCH transmissions in the third beam direction.

[0223] According to the precoding indication method of this disclosure, the network device obtains the TRI used for PUSCH transmission in each beam direction of the UE, and sends a single DCI carrying TCI beam indication information and transmission configuration information to the UE. The UE performs PUSCH transmission according to the single DCI, wherein the TCI beam indication information is used to indicate the beam information used by the UE for transmission, the TCI beam indication information indicates two or more beams, and the transmission configuration information includes two or more SRI indication fields, wherein each SRI indication field indicates only an SRI. Therefore, multi-antenna panel multi-TRP transmission based on codebooks can be used in this single DCI, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0224] In the embodiments provided above, the methods provided by the embodiments of this application have been described from the perspective of a network device. To implement the functions of the methods provided in the embodiments of this application, the network device may include hardware structures and software modules, and may implement the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. One of the above functions may be executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules.

[0225] Corresponding to the precoding indication methods provided in the above embodiments, this disclosure also provides a precoding indication device. Since the precoding indication device provided in this disclosure corresponds to the precoding indication methods provided in the above embodiments, the implementation of the precoding indication methods is also applicable to the precoding indication device provided in this embodiment, and will not be described in detail in this embodiment.

[0226] Figure 12 This is a schematic diagram of a precoding instruction device 1200 provided in an embodiment of the present disclosure. The precoding instruction device 1200 can be used in network devices.

[0227] like Figure 12 As shown, the device 1200 may include a transceiver module 1201.

[0228] The transceiver module 1201 is used to send a single downlink control information (DCI) to a user equipment (UE). The single DCI includes a transmission configuration indication (TCI) beam indication information and transmission configuration information. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single transmission and receiver point transmission (TRP). When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission.

[0229] Each set of information indication fields includes at least one of the probe reference signal (SRS) resource indication (SRI) indication field and the transport precoding matrix indication (TPMI) indication field.

[0230] According to the precoding indication apparatus of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field. According to the precoding indication method and apparatus of this disclosure, a single DCI carries TCI beam indication information and transmission configuration information, and the information indication fields included in the transmission configuration information of the single DCI can be dynamically applied to single-antenna panel single-TRP transmission and multi-antenna panel multi-TRP transmission. This enables switching between single-TRP and multi-TRP transmission, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0231] In some embodiments, when the transmission configuration information includes two or more TPMI indication fields, the multi-antenna panel multi-TRP transmission is a codebook-based Physical Uplink Shared Channel (PUSCH) transmission, wherein each of the two or more TPMI indication fields is used to indicate the precoding matrix of the PUSCH transmission in the associated beam direction; and when the transmission configuration information includes two or more SRI indication fields, the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, wherein each of the two or more SRI indication fields is used to indicate one or more SRS resources carrying precoding information in the SRS resource set allocated to the PUSCH transmission in the associated beam direction.

[0232] In some embodiments, each of the two or more TPMI indication fields indicates TPMI and transmission rank indication TRI according to a codebook preconfiguration table, and the codebook preconfiguration table is determined according to the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is determined according to the number of available TPMI combinations in the corresponding codebook preconfiguration table.

[0233] In some embodiments, the transceiver module 1201 is further configured to acquire rank indication information, which indicates the TRI used for PUSCH transmission in each beam direction of the UE. Each of the two or more TPMI indication fields indicates a TPMI according to a TPMI sub-table, wherein the TPMI sub-table is determined from a codebook pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction. The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset restriction for PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max It is determined that each available TRI is configured according to the codebook parameters of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction.

[0234] In some embodiments, for a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... This indicates rounding up to the nearest integer.

[0235] In some embodiments, each of the two or more SRI indication fields indicates SRI and TRI according to an SRI preconfiguration table, wherein the SRI preconfiguration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI preconfiguration table.

[0236] In some embodiments, the transceiver module 1201 is further configured to acquire rank indication information, which indicates the TRI used for PUSCH transmission in each beam direction of the UE. Each of the two or more SRI indication fields indicates an SRI according to an SRI sub-table, wherein the SRI sub-table is determined from an SRI pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max It is determined that each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction.

[0237] In some embodiments, for a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M²-K²) code points are reserved values, where M² is... This indicates rounding up to the nearest integer.

[0238] In some embodiments, the rank indication information is obtained based on any of the following: the demodulation reference signal (DMRS) domain of the individual DCI; the reserved or extended code points of any indication domain in the individual DCI; the newly added indication domain in the individual DCI; and the number of codewords supported by the individual DCI.

[0239] In some embodiments, when the transmission configuration information is used for two or more sets of information indication fields in a multi-antenna panel multi-TRP transmission and the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the association between the SRI indication field and the SRS resource set is predefined or indicated by the SRS resource set indication field in the single DCI.

[0240] Figure 13 This is a schematic diagram of a precoding instruction device 1300 provided in an embodiment of the present disclosure. The precoding instruction device 1300 can be used in a UE.

[0241] like Figure 13 As shown, the device 1300 may include a transceiver module 1301 and a processing module 1302.

[0242] The transceiver module 1301 is used to receive a single downlink control information (DCI) of bearer transmission configuration indication (TCI) beam indication information and transmission configuration information sent by the network device. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single transmission and receiver point transmission (TRP). When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of sounding reference signal (SRS) resource indication (SRI) indication field and transmission precoding matrix indication (TPMI) indication field.

[0243] The processing module 1302 is used to perform physical uplink shared channel (PUSCH) transmission based on the single DCI.

[0244] According to the precoding indication apparatus of this disclosure, a network device sends a single DCI carrying TCI beam indication information and transmission configuration information to a UE. The UE performs PUSCH transmission based on the single DCI. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-TRP transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of an SRI indication field and a TPMI indication field. According to the precoding indication method and apparatus of this disclosure, a single DCI carries TCI beam indication information and transmission configuration information, and the information indication fields included in the transmission configuration information of the single DCI can be dynamically applied to single-antenna panel single-TRP transmission and multi-antenna panel multi-TRP transmission. This enables switching between single-TRP and multi-TRP transmission, making multi-point cooperative transmission more efficient, thereby effectively improving the reliability and throughput of data transmission.

[0245] In some embodiments, when the transmission configuration information includes two or more TPMI indication fields, the multi-antenna panel multi-TRP transmission is a codebook-based Physical Uplink Shared Channel (PUSCH) transmission, wherein each of the two or more TPMI indication fields is used to indicate the precoding matrix of the PUSCH transmission in the associated beam direction; and when the transmission configuration information includes two or more SRI indication fields, the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, wherein each of the two or more SRI indication fields is used to indicate one or more SRS resources carrying precoding information in the SRS resource set allocated to the PUSCH transmission in the associated beam direction.

[0246] In some embodiments, when the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the processing module 1302 is configured to determine a precoding matrix for PUSCH transmission in each beam direction based on the TPMI and Transmission Rank Indicator (TRI) indicated in each of the two or more TPMI indication fields and a codebook preconfiguration table, wherein the codebook preconfiguration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset restriction for PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is determined based on the number of available TPMI combinations in the codebook preconfiguration table; and to perform codebook-based PUSCH transmission in each beam direction according to the corresponding precoding matrix.

[0247] In some embodiments, when the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the processing module 1302 is configured to determine a precoding matrix for PUSCH transmission in each beam direction based on the TPMI indicated in each of the two or more TPMI indication fields and a TPMI sub-table, wherein the TPMI sub-table is determined from a codebook pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction, the codebook pre-configuration table is determined based on the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max The determination is made based on the codebook parameter configuration of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction; and codebook-based PUSCH transmission is performed in each beam direction according to the corresponding precoding matrix.

[0248] In some embodiments, for a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... This indicates rounding up to the nearest integer.

[0249] In some embodiments, when the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the processing module 1302 is configured to determine the SRS resources for PUSCH transmission in each beam direction according to the SRI and TRI indicated in each of the two or more SRI indication fields and the SRI pre-configuration table, wherein the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table; and to perform non-codebook-based PUSCH transmission using the precoding information carried by the corresponding SRS resources in each beam direction.

[0250] In some embodiments, when the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the processing module 1302 is configured to determine the SRS resources for the PUSCH transmission in each beam direction based on the SRI indicated in each of the two or more SRI indication fields and the SRI sub-table, wherein the SRI sub-table is determined from the SRI pre-configuration table based on the TRI used by the PUSCH transmission in the corresponding beam direction, the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is based on the maximum value N of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max It is determined that each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction; and that non-codebook-based PUSCH transmission is performed in each beam direction using precoding information carried by the corresponding SRS resources.

[0251] In some embodiments, for a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M²-K²) code points are reserved values, where M² is... This indicates rounding up to the nearest integer.

[0252] In some embodiments, when the transmission configuration information is used for two or more sets of information indication fields in a multi-antenna panel multi-TRP transmission and the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the association between the SRI indication field and the SRS resource set is predefined or indicated by the SRS resource set indication field in the single DCI.

[0253] Please see Figure 14 , Figure 14 This is a schematic diagram of the structure of a communication device 1400 provided in an embodiment of this application. The communication device 1400 can be a network device, a user device, a chip, chip system, or processor that supports the network device in implementing the above methods, or a chip, chip system, or processor that supports the user device in implementing the above methods. This device can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0254] The communication device 1400 may include one or more processors 1401. The processor 1401 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal equipment, terminal equipment chip, DU or CU, etc.), execute computer programs, and process data from the computer programs.

[0255] Optionally, the communication device 1400 may further include one or more memories 1402, on which a computer program 1404 may be stored. The processor 1401 executes the computer program 1404 to cause the communication device 1400 to perform the method described in the above method embodiments. Optionally, the memory 1402 may also store data. The communication device 1400 and the memory 1402 may be provided separately or integrated together.

[0256] Optionally, the communication device 1400 may also include a transceiver 1405 and an antenna 1406. The transceiver 1405 may be referred to as a transceiver unit, transceiver, or transceiver circuit, etc., and is used to implement the transmission and reception functions. The transceiver 1405 may include a receiver and a transmitter. The receiver may be referred to as a receiver or receiving circuit, etc., and is used to implement the receiving function; the transmitter may be referred to as a transmitter or transmitting circuit, etc., and is used to implement the transmitting function.

[0257] Optionally, the communication device 1400 may further include one or more interface circuits 1407. The interface circuits 1407 are used to receive code instructions and transmit them to the processor 1401. The processor 1401 executes the code instructions to cause the communication device 1400 to perform the methods described in the above method embodiments.

[0258] In one implementation, the processor 1401 may include a transceiver for implementing receive and transmit functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receive and transmit functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

[0259] In one implementation, processor 1401 may store computer program 1403, which runs on processor 1401 and causes communication device 1400 to perform the methods described in the above method embodiments. Computer program 1403 may be embedded in processor 1401, in which case processor 1401 may be implemented in hardware.

[0260] In one implementation, the communication device 1400 may include circuitry capable of performing the functions of transmitting, receiving, or communicating as described in the foregoing method embodiments. The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal-oxide semiconductors (CMOS), n-metal-oxide-semiconductor (NMOS), positive-channel metal-oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon-germanium (SiGe), gallium arsenide (GaAs), etc.

[0261] The communication device described in the above embodiments may be a network device or a user equipment, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may vary. Figure 14 The communication device may be a standalone device or part of a larger device. For example, the communication device may be:

[0262] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0263] (2) A collection of one or more ICs, optionally including storage components for storing data and computer programs;

[0264] (3) ASIC, such as modem;

[0265] (4) Modules that can be embedded in other devices;

[0266] (5) Receivers, terminal equipment, smart terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.

[0267] (6) Others, etc.

[0268] For cases where the communication device can be a chip or a chip system, please refer to [link / reference]. Figure 15 The diagram shows the structure of the chip. Figure 15 The chip shown includes a processor 1501 and an interface 1502. There can be one or more processors 1501, and multiple interfaces 1502.

[0269] Optionally, the chip also includes a memory 1503, which is used to store necessary computer programs and data.

[0270] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0271] This application also provides a readable storage medium having instructions stored thereon that, when executed by a computer, implement the functions of any of the above method embodiments.

[0272] This application also provides a computer program product that, when executed by a computer, implements the functions of any of the above method embodiments.

[0273] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0274] Those skilled in the art will understand that the various numerical designations such as "first," "second," etc., involved in this application are merely for the convenience of description and are not intended to limit the scope of the embodiments of this application, nor do they indicate the order of sequence.

[0275] At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not impose any limitation. In the embodiments of this application, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order or size among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0276] As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, device, and / or apparatus (e.g., disk, optical disk, memory, programmable logic device (PLD)) used to provide machine instructions and / or data to a programmable processor, including machine-readable media that receive machine instructions as machine-readable signals. The term "machine-readable signal" refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0277] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with embodiments of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

[0278] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. Client-server relationships are created by computer programs running on the respective computers and having a client-server relationship with each other.

[0279] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0280] Furthermore, it should be understood that the various embodiments described in this application can be implemented individually or in combination with other embodiments, where the scheme allows.

[0281] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0282] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0283] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A precoding indication method, characterized in that, The method is performed by a network device, and the method includes: A single downlink control information (DCI) is sent to the user equipment (UE). The single DCI includes a transmission configuration indication (TCI) beam indication information and transmission configuration information. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single transmission and receiver point-of-reception (TRP) transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of the probe reference signal (SRS) resource indication (SRI) indication field and the transport precoding matrix indication (TPMI) indication field; The method further includes: Obtain rank indication information, which is used to indicate the transmission rank indication (TRI) used for PUSCH transmission in each beam direction of the UE; When the transmission configuration information includes two or more TPMI indication fields, each of the two or more TPMI indication fields indicates a TPMI according to a TPMI sub-table, wherein the TPMI sub-table is determined from a codebook pre-configuration table according to the TRI used for PUSCH transmission in the corresponding beam direction, the codebook pre-configuration table is determined according to the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max It is determined that each available TRI is configured according to the codebook parameters of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction. When the transmission configuration information includes two or more SRI indication fields, each of the two or more SRI indication fields indicates an SRI according to an SRI sub-table, wherein the SRI sub-table is determined from an SRI pre-configuration table based on the TRI used by the PUSCH transmission in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max It is determined that each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction.

2. The method as described in claim 1, characterized in that, When the transmission configuration information includes two or more TPMI indication fields, the multi-antenna panel multi-TRP transmission is a codebook-based physical uplink shared channel (PUSCH) transmission, wherein each of the two or more TPMI indication fields is used to indicate the precoding matrix of the PUSCH transmission in the associated beam direction. as well as When the transmission configuration information includes two or more SRI indication fields, the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, wherein each of the two or more SRI indication fields is used to indicate one or more SRS resources carrying precoded information in the SRS resource set allocated to the PUSCH transmission in the associated beam direction.

3. The method as described in claim 2, characterized in that, Each of the two or more TPMI indication fields indicates TPMI and transmission rank indication TRI according to the codebook preconfiguration table, and the codebook preconfiguration table is determined according to the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is determined according to the number of available TPMI combinations in the corresponding codebook preconfiguration table.

4. The method as described in claim 1, characterized in that, For a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent the K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... log2(N1 max ) , This indicates rounding up to the nearest integer.

5. The method as described in claim 2, characterized in that, Each of the two or more SRI indication fields indicates SRI and TRI according to an SRI pre-configuration table, wherein the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table.

6. The method as described in claim 1, characterized in that, For a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent the K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M² - K²) code points are reserved values, where M² is... log2(N2 max ) , This indicates rounding up to the nearest integer.

7. The method as described in claim 1, characterized in that, The rank indication information is obtained according to any one of the following: The demodulation reference signal DMRS domain of the single DCI; Reserved or extended code points of any indicator field in the single DCI; The newly added indication field in the single DCI; and The number of codewords supported by a single DCI.

8. The method according to any one of claims 1-7, characterized in that, When the transmission configuration information is used for two or more sets of information indication fields in a multi-antenna panel multi-TRP transmission and the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the association between the SRI indication field and the SRS resource set is predefined or indicated by the SRS resource set indication field in the single DCI.

9. A precoding indication method, characterized in that, The method is executed by a user equipment (UE), and the method includes: The network device receives a single downlink control information (DCI) containing a bearer transmission configuration indication (TCI) beam indication information and transmission configuration information. The TCI beam indication information indicates the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-transmission and receive-point-of-reception (TRP) transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission, wherein each set of information indication fields includes at least one of a sounding reference signal (SRS) resource indication (SRI) field and a transport precoding matrix indication (TPMI) field. Physical uplink shared channel (PUSCH) transmission is performed based on the single DCI; The method further includes: When the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI includes: When the transmission configuration information includes two or more TPMI indication fields, a precoding matrix for PUSCH transmission in each beam direction is determined based on the TPMI indicated in each of the two or more TPMI indication fields and a TPMI sub-table. The TPMI sub-table is determined from a codebook pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction. The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset restrictions for PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max Determined, wherein each available TRI is determined based on the codebook parameter configuration of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction; and PUSCH transmission based on codebook is performed in each beam direction according to the corresponding precoding matrix; When the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI includes: When the transmission configuration information includes two or more TPMI indication fields, the SRS resources for PUSCH transmission in each beam direction are determined based on the SRI indicated in each of the two or more SRI indication fields and the SRI sub-table. The SRI sub-table is determined from the SRI pre-configuration table based on the TRI used by the PUSCH transmission in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max Determined, wherein each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction; and Non-codebook-based PUSCH transmission is performed using the precoded information carried by the corresponding SRS resources in each beam direction.

10. The method as described in claim 9, characterized in that, When the transmission configuration information includes two or more TPMI indication fields, the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, wherein each of the two or more TPMI indication fields is used to indicate the precoding matrix of the PUSCH transmission in the associated beam direction. as well as When the TCI beam indication information indicates two or more beams and the transmission configuration information includes two or more SRI indication fields, the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, wherein each of the two or more SRI indication fields is used to indicate one or more SRS resources carrying precoded information in the SRS resource set allocated to the PUSCH transmission in the associated beam direction.

11. The method as described in claim 10, characterized in that, When the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI further includes: Based on the TPMI and Transmission Rank Indicator (TRI) indicated in each of the two or more TPMI indication fields, and a codebook pre-configuration table, a precoding matrix for PUSCH transmission in each beam direction is determined, wherein the codebook pre-configuration table is determined according to the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset constraints for PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is determined according to the number of available TPMI combinations in the corresponding codebook pre-configuration table; and PUSCH transmission based on the codebook is performed in each beam direction according to the corresponding precoding matrix.

12. The method as described in claim 9, characterized in that, For a specific TRI, the number of code points in the TPMI sub-table is 2^M1, where K1 code points represent the K1 TPMI values ​​corresponding to the specific TRI in the corresponding codebook pre-configuration table, and the remaining (2^M1-K1) code points are reserved values, where M1 is... log2(N1 max ) , This indicates rounding up to the nearest integer.

13. The method as described in claim 10, characterized in that, When the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the PUSCH transmission based on the single DCI further includes: Based on the SRI and TRI indicated in each of the two or more SRI indication fields, and the SRI pre-configuration table, SRS resources for PUSCH transmissions in each beam direction are determined, wherein the SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each SRI indication field is determined based on the number of available SRI combinations in the SRI pre-configuration table; and Non-codebook-based PUSCH transmission is performed using the precoded information carried by the corresponding SRS resources in each beam direction.

14. The method as described in claim 9, characterized in that, For a specific TRI, the number of code points in the SRI sub-table is 2^M², where K² code points represent the K² SRI values ​​corresponding to the specific TRI in the corresponding SRI pre-configuration table, and the remaining (2^M² - K²) code points are reserved values, where M² is... log2(N2 max ) , This indicates rounding up to the nearest integer.

15. A precoding indication device, characterized in that, For use in network devices, the apparatus includes a transceiver module, wherein... The transceiver module is used to send a single downlink control information (DCI) to a user equipment (UE). The single DCI includes a transmission configuration indication (TCI) beam indication information and transmission configuration information. The TCI beam indication information is used to indicate the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single transmission and receiver point transmission (TRP). When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission. Each set of information indication fields includes at least one of the probe reference signal (SRS) resource indication (SRI) indication field and the transport precoding matrix indication (TPMI) indication field; The device is also used for: Obtain rank indication information, which is used to indicate the transmission rank indication (TRI) used for PUSCH transmission in each beam direction of the UE; When the transmission configuration information includes two or more TPMI indication fields, each of the two or more TPMI indication fields indicates a TPMI according to a TPMI sub-table, wherein the TPMI sub-table is determined from a codebook pre-configuration table according to the TRI used for PUSCH transmission in the corresponding beam direction, the codebook pre-configuration table is determined according to the codebook parameter configuration of PUSCH transmission in the corresponding beam direction and the codebook subset restriction of PUSCH transmission in the corresponding beam direction, and the number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max It is determined that each available TRI is configured according to the codebook parameters of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction. When the transmission configuration information includes two or more SRI indication fields, each of the two or more SRI indication fields indicates an SRI according to an SRI sub-table, wherein the SRI sub-table is determined from an SRI pre-configuration table based on the TRI used by the PUSCH transmission in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max It is determined that each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction.

16. A precoding indication device, characterized in that, For execution by a user equipment (UE), the apparatus includes: The transceiver module is configured to receive a single downlink control information (DCI) of bearer transmission configuration indication (TCI) beam indication information and transmission configuration information sent by a network device. The TCI beam indication information indicates the beam information used by the UE for transmission. When the TCI beam indication information indicates one beam, the transmission configuration information includes a set of information indication fields for single-antenna panel single-transmission and receive-point-receive (TRP) transmission. When the TCI beam indication information indicates two or more beams, the transmission configuration information includes two or more sets of information indication fields for multi-antenna panel multi-TRP transmission, wherein each set of information indication fields includes at least one of a sounding reference signal (SRS) resource indication (SRI) field and a transmission precoding matrix indication (TPMI) field. The processing module is used to perform physical uplink shared channel (PUSCH) transmission based on the single DCI; When the multi-antenna panel multi-TRP transmission is a codebook-based PUSCH transmission, the processing module is specifically used for: When the transmission configuration information includes two or more TPMI indication fields, a precoding matrix for PUSCH transmission in each beam direction is determined based on the TPMI indicated in each of the two or more TPMI indication fields and a TPMI sub-table. The TPMI sub-table is determined from a codebook pre-configuration table based on the TRI used for PUSCH transmission in the corresponding beam direction. The codebook pre-configuration table is determined based on the codebook parameter configuration for PUSCH transmission in the corresponding beam direction and the codebook subset restrictions for PUSCH transmission in the corresponding beam direction. The number of bits occupied by each TPMI indication field is based on the maximum value N1 of the number of available TPMI combinations corresponding to each available TRI in the corresponding codebook pre-configuration table. max Determined, wherein each available TRI is determined based on the codebook parameter configuration of the PUSCH transmission in the corresponding beam direction and the codebook subset constraint of the PUSCH transmission in the corresponding beam direction; and PUSCH transmission based on codebook is performed in each beam direction according to the corresponding precoding matrix; When the multi-antenna panel multi-TRP transmission is a non-codebook-based PUSCH transmission, the processing module is specifically used for: When the transmission configuration information includes two or more TPMI indication fields, the SRS resources for PUSCH transmission in each beam direction are determined based on the SRI indicated in each of the two or more SRI indication fields and the SRI sub-table. The SRI sub-table is determined from the SRI pre-configuration table based on the TRI used by the PUSCH transmission in the corresponding beam direction. The SRI pre-configuration table is determined based on the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction. The number of bits occupied by each SRI indication field is based on the maximum value N2 of the number of available SRI combinations corresponding to each available TRI in the corresponding SRI pre-configuration table. max Determined, wherein each available TRI is an integer greater than or equal to 1 and less than or equal to a first value, the first value being the smaller of the maximum uplink transmission layer supported by the PUSCH transmission in the corresponding beam direction and the number of SRS resources in the SRS resource set allocated to the PUSCH transmission in the corresponding beam direction; and Non-codebook-based PUSCH transmission is performed using the precoded information carried by the corresponding SRS resources in each beam direction.

17. A communication device, wherein, include: transceiver; Memory; A processor, connected to both the transceiver and the memory, is configured to control the wireless signal transmission and reception of the transceiver by executing computer-executable instructions on the memory, and to implement the method described in any one of claims 1-14.

18. A computer storage medium, wherein, The computer storage medium stores computer-executable instructions; when the computer-executable instructions are executed by a processor, they can implement the method described in any one of claims 1-14.

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