Coefficient indication method and device

Abstract

An embodiment of the present application discloses a coefficient indication method and apparatus thereof, which can be applied to the field of communication technology, the method comprising: a terminal device can receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; coefficient position indication information is sent to the network device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combined coefficient matrix, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the terminal device feedback overhead in a scenario where multiple TRPs or multiple TRP groups provide data services to the terminal through coherent collaborative transmission.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a coefficient indication method and a device thereof. Background Art

[0002] Cooperative multi-point transmission refers to multiple transmission reception points (mTRP) / multi-panel (Panel) providing data services for one user. In the scenario of multiple TRPs or multiple TRP groups, there is currently a lack of a method for indicating the position of coefficients in the combination coefficient matrix. Summary of the invention

[0003] An embodiment of the present application provides a coefficient indication method and apparatus thereof, which can enable a terminal device to indicate the position of coefficients in a combined coefficient matrix in a scenario of multiple TRPs or multiple TRP groups, so that a network device can determine the coefficients based on the coefficient positions and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device in the scenario of multiple TRPs or multiple TRP groups.

[0004] In a first aspect, an embodiment of the present application provides a coefficient indication method, which is performed by a terminal device, and the method includes:

[0005] Receiving codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups;

[0006] Sending coefficient position indication information to the network device;

[0007] The coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0008] In an embodiment of the present application, a terminal device may receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; and coefficient position indication information is sent to the network device; wherein the coefficient position indication information is used to indicate the position of the coefficient in the combined coefficient matrix, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device in the scenario of multiple TRPs or multiple TRP groups.

[0009] In a second aspect, an embodiment of the present application provides a coefficient indication method, which is performed by a network device, and the method includes:

[0010] Sending codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups;

[0011] Receiving coefficient position indication information sent by the terminal device;

[0012] The coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0013] In an embodiment of the present application, a network device may send codebook parameter information to a terminal device; the codebook parameter information is used to determine the dimension of a combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; and receive coefficient position indication information sent by the terminal device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combined coefficient matrix; and then the coefficient may be determined based on the coefficient position, and then subsequent processing may be performed, thereby reducing the feedback overhead of the terminal device in the scenario of multiple TRPs or multiple TRP groups.

[0014] In a third aspect, an embodiment of the present application provides a communication device, which has some or all of the functions of the terminal device in the method described in the first aspect above. For example, the functions of the communication device may have some or all of the functions in the embodiments of the present application, or may have the functions of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0015] In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is used to couple with the transceiver module and the processing module, and store the computer programs and data necessary for the communication device.

[0016] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0017] In a fourth aspect, an embodiment of the present application provides another communication device, which has some or all of the functions of the network device in the method example described in the second aspect above, such as the functions of the communication device may have some or all of the functions in the embodiments of the present application, or may have the functions of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0018] In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is used to couple with the transceiver module and the processing module, and store the computer programs and data necessary for the communication device.

[0019] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the first aspect is executed.

[0020] In a sixth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the second aspect is executed.

[0021] In the seventh aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0022] In an eighth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0023] In a ninth aspect, an embodiment of the present application provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the first aspect above.

[0024] In the tenth aspect, an embodiment of the present application provides a communication device, which includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.

[0025] In the eleventh aspect, an embodiment of the present application provides a communication system, which includes the communication device described in the third aspect and the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect and the communication device described in the sixth aspect, or the system includes the communication device described in the seventh aspect and the communication device described in the eighth aspect, or the system includes the communication device described in the ninth aspect and the communication device described in the tenth aspect.

[0026] In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the above-mentioned terminal device, and when the instructions are executed, the terminal device executes the method described in the first aspect.

[0027] In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions used by the above-mentioned network device, and when the instructions are executed, the network device executes the method described in the above-mentioned second aspect.

[0028] In a fourteenth aspect, the present application also provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0029] In a fifteenth aspect, the present application also provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above.

[0030] In a sixteenth aspect, the present application provides a chip system, which includes at least one processor and an interface, for supporting a terminal device to implement the functions involved in the first aspect, for example, determining or processing at least one of the data and information involved in the above method. In one possible design, the chip system also includes a memory, which is used to store computer programs and data necessary for the terminal device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0031] In the seventeenth aspect, the present application provides a chip system, which includes at least one processor and an interface, and is used to support the network device to implement the functions involved in the second aspect, for example, determining or processing at least one of the data and information involved in the above method. In one possible design, the chip system also includes a memory, and the memory is used to store computer programs and data necessary for the network device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0032] In an eighteenth aspect, the present application provides a computer program which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0033] In a nineteenth aspect, the present application provides a computer program which, when executed on a computer, enables the computer to execute the method described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0035] Figure 1 is a schematic diagram of a multi-point coordinated transmission provided in an embodiment of the present application;

[0036] Figure 2 It is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0037] Figure 3 It is a flowchart of a coefficient indication method provided in an embodiment of the present application;

[0038] Figure 4 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0039] Figure 5 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0040] Figure 5a is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0041] Figure 5b is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0042] Figure 6 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0043] Figure 7 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0044] Figure 7a is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0045] Figure 7b is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0046] Figure 8 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0047] Fig. 9 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0048] Fig.10 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0049] Fig.11 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0050] Fig.12is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0051] Fig.13 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0052] Fig.14 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0053] Fig.15 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0054] Fig.16 is a flow chart of another coefficient indication method provided in an embodiment of the present application;

[0055] Fig.17 is a structural diagram of a communication device provided in an embodiment of the present application;

[0056] Fig.18 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0057] Fig.19 It is a schematic diagram of the structure of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0059] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0060] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" for the purpose of brevity and ease of understanding, the terms used herein when characterizing the size relationship are "greater than" or "less than", "higher than" or "lower than". However, for those skilled in the art, it can be understood that the term "greater than" also covers the meaning of "greater than or equal to", and "less than" also covers the meaning of "less than or equal to"; the term "higher than" covers the meaning of "higher than or equal to", and "lower than" also covers the meaning of "lower than or equal to".

[0061] To facilitate understanding, the terms involved in this application are first introduced.

[0062] 1. SD (Spatial Domain) basis vector

[0063] In the embodiment of the present application, the spatial domain may include a transmitting side spatial domain and a receiving side spatial domain, and the spatial domain basis vector may be determined according to the transmitting side spatial domain basis vector. Each transmitting side spatial domain basis vector may correspond to a transmitting beam of a transmitting end device. Each receiving side spatial domain basis vector may correspond to a receiving beam of a receiving end device.

[0064] The following explanation is made using the transmitting side spatial basis vector as an example, and the receiving side spatial basis vector is similar to the transmitting side spatial basis vector. The transmitting side spatial basis vector is usually associated with the transmitting side antenna array. For example, many parameters involved in the transmitting side spatial basis vector expression can be understood as different properties used to characterize the transmitting side antenna array. Therefore, in order to facilitate the understanding of the transmitting side spatial basis vector involved in the embodiment of the present application, the transmitting side spatial basis vector will be described in conjunction with the transmitting side antenna array below. Nevertheless, those skilled in the art should understand that the transmitting side spatial basis vector involved in the embodiment of the present application is not limited to a specific antenna array. In the specific implementation process, a suitable antenna array can be selected according to specific needs, and based on the selected antenna array, various parameters involved in the transmitting side spatial basis vector involved in the embodiment of the present application are set.

[0065] 2. FD (Frequency Domain) basis vectors

[0066] The frequency domain basis vectors are used to characterize the variation of the channel in the frequency domain. The frequency domain basis vectors can be used to specifically represent the variation of the weighted coefficients of each spatial domain basis vector in each frequency domain unit. The variation represented by the frequency domain basis vectors is related to factors such as multipath delay. It is understandable that when a signal is transmitted through a wireless channel, there may be different transmission delays on different transmission paths. The variation of the channel in the frequency domain caused by different transmission delays can be represented by different frequency domain basis vectors.

[0067] 3. Multi-point cooperative transmission technology

[0068] Multi-point cooperative transmission technology can be roughly divided into two types: coherent joint transmission (CJT) and incoherent joint transmission (NCJT). CJT means that each data stream will be mapped to the m-TRP / Panel participating in the cooperation through a weighted vector. CJT is equivalent to splicing multiple sub-arrays into a higher-dimensional virtual array to obtain higher shaping or precoding gain.

[0069] Figure 1 A scenario is given in which three TRPs serve a terminal device (e.g., a user equipment UE) through CJT. The channels from the terminal device to each TRP are denoted as H1, H2, and H3. When calculating the precoding of the terminal device, these channels can be combined together as a higher-dimensional channel, i.e. Then, the downlink data transmission precoding of the terminal device is calculated based on H.

[0070] When multiple TRPs perform CJT, the following optional codebook structure can be used to calculate the user's downlink data transmission precoding:

[0071]

[0072]

[0073]

[0074] Among them, a n and p n Respectively represent the phase factor and amplitude factor corresponding to the nth TRP. 1，n represents the spatial domain (SD) basis vector corresponding to the nth TRP, represents the combination coefficient matrix corresponding to the nth TRP, W f，n represents the frequency domain (FD) basis vector corresponding to the nth TRP, W SF，nrepresents the combination of SD and FD basis vectors corresponding to the nth TRP, represents the combination coefficient matrix corresponding to N TRPs, W f Represents the FD basis vectors corresponding to N TRPs.

[0075] For the combination coefficient matrix in the Rel-16 / 17 Type II codebook structure Quantization uses a differential method in the polarization direction to improve the quantization accuracy of the combination coefficient matrix. That is, each combination coefficient in the combination coefficient matrix can be expressed as the product of two elements, as shown in the following formula:

[0076]

[0077] Where r0 and r1 represent the reference amplitude of the first polarization direction and the reference amplitude of the second polarization direction respectively. Represents the combination coefficient matrix The coefficients of the 1st row and mth column in the pth polarization direction in , the coefficients can be represented by the corresponding differential amplitude and differential phase. The reference amplitude is quantized by 4 bits, and the differential amplitude and differential phase are quantized by 3 bits and 4 bits respectively.

[0078] Again Before performing differential quantization, it is necessary to first normalize the combination coefficients in the combination coefficient matrix. The combination coefficient matrix after normalization contains a strongest combination coefficient with an amplitude of 1, and the reference amplitude r0 or r1 corresponding to the polarization direction where the strongest combination coefficient is located is not reported. In order to reduce the feedback overhead of the terminal device, in a TRP scenario, the terminal device does not report the strongest combination coefficient quantization, but only reports less indication information to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to a TRP. For the Rel-16 Type II codebook, the terminal device reports or Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to a TRP. NZ Indicates the total number of non-zero coefficients in the combination coefficient matrix when rank = 1; L indicates the number of SD basis vectors. For Rel-17 Type II port selection, the terminal device reports Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to a TRP.

[0079] In order to better understand a coefficient indication method disclosed in an embodiment of the present application, the communication system to which the embodiment of the present application is applicable is first described below.

[0080] See also Figure 2 , Figure 2The present invention provides a schematic diagram of the architecture of a communication system. The communication system may include but is not limited to a network device and a terminal device. Figure 2 The number and form of the devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of the present application. In actual applications, two or more network devices and two or more terminal devices may be included. Figure 2 The communication system shown includes a network device 101 and a terminal device 102 as an example.

[0081] It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems. It should also be noted that the side link in the embodiments of the present application can also be called a side link or a through link.

[0082] The network device 101 in the embodiment of the present application is an entity on the network side for transmitting or receiving signals. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. The network device provided in the embodiment of the present application may be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU may also be referred to as a control unit. The CU-DU structure may be used to split the protocol layer of the network device, such as the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0083] The terminal device 102 in the embodiment of the present application is an entity for receiving or transmitting signals on the user side, such as a mobile phone. The terminal device can also be called a terminal device (terminal), a user equipment (UE), a mobile station (MS), a mobile terminal device (MT), etc. The terminal device can be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

[0084] In sidelink communication, there are four sidelink transmission modes. Sidelink transmission mode 1 and sidelink transmission mode 2 are used for device-to-device (D2D) communication. Sidelink transmission mode 3 and sidelink transmission mode 4 are used for V2X communication. When sidelink transmission mode 3 is adopted, resource allocation is scheduled by network device 101. Specifically, network device 101 can send resource allocation information to terminal device 102, and then the terminal device 102 allocates resources to another terminal device, so that the other terminal device can send information to network device 101 through the allocated resources. In V2X communication, a terminal device with better signal or higher reliability can be used as terminal device 102. The first terminal device mentioned in the embodiment of the present application may refer to the terminal device 102, and the second terminal device may refer to the other terminal device.

[0085] It can be understood that the communication system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0086] It should be noted that the coefficient indication method provided in any embodiment of the present application can be executed alone, or can be executed in combination with possible implementation methods in other embodiments, or can be executed in combination with any technical solution in the related technology.

[0087] The coefficient indication method and device provided by the present application are described in detail below in conjunction with the accompanying drawings.

[0088] See also Figure 3 , Figure 3 is a flow chart of a coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 3 As shown, the method may include but is not limited to the following steps:

[0089] Step S301: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups.

[0090] In an embodiment of the present application, in one example, codebook parameter information can be used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs. Among the multiple TRPs, each TRP corresponds to a combination coefficient matrix. In another example, codebook parameter information can be used to determine the dimension of a combination coefficient matrix corresponding to multiple TRP groups. Among the multiple TRP groups, each TRP group corresponds to a combination coefficient matrix. Among them, a TRP group can include one or more TRPs.

[0091] In the embodiment of the present application, the codebook parameter information includes: the number of TRP / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRP / TRP groups; wherein the number of basis vectors includes at least one of the following: the number of SD basis vectors; the number of FD basis vectors; the number of ports; the number of vector pairs of SD basis vectors and FD basis vectors. The number of ports here refers to the number of CSI-RS ports of the channel state information reference signal.

[0092] In an embodiment of the present application, when the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs, the codebook parameter information may include: the number of TRPs, the number of basis vectors corresponding to one TRP or multiple TRPs. In one example, the codebook parameter information may include: the number of TRPs, the number of basis vectors corresponding to one TRP. In another example, the codebook parameter information may include: the number of TRPs, the number of basis vectors corresponding to multiple TRPs. Among them, the number of basis vectors corresponding to multiple TRPs refers to the total number of corresponding basis vectors in all TRPs.

[0093] The multiple TRPs may be located in the same TRP group or in different TRP groups. The TRP groups to which any two TRPs belong may be the same or different, which is not specifically limited here.

[0094] Among them, the terminal device can determine the dimension of the combination coefficient matrix corresponding to multiple TRPs based on the codebook parameter information configured by the network device, and then determine the combination coefficient matrix corresponding to multiple TRPs.

[0095] In the case where the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups, the codebook parameter information may include: the number of TRP groups, the number of basis vectors corresponding to one TRP group or multiple TRP groups. In one example, the codebook parameter information may include: the number of TRP groups, the number of basis vectors corresponding to one TRP group. In another example, the codebook parameter information may include: the number of TRP groups, the number of basis vectors corresponding to multiple TRP groups. Among them, the number of basis vectors corresponding to multiple TRP groups refers to the total number of corresponding basis vectors in all TRP groups.

[0096] Among them, the terminal device can determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups based on the codebook parameter information configured by the network device, and then determine the combination coefficient matrix corresponding to multiple TRP groups.

[0097] Step S302: Send coefficient position indication information to the network device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0098] In the embodiment of the present application, the coefficient may include at least one of the following: the strongest combination coefficient, the strongest reference amplitude, and the strongest amplitude. For multiple TRPs or multiple TRP groups, the number of the strongest combination coefficients may be one or more.

[0099] Wherein, in the case where the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs, the terminal device can determine the combination coefficient matrix corresponding to multiple TRPs. Wherein, each TRP can correspond to a combination coefficient matrix. Wherein, in one example, for the combination coefficient matrices corresponding to multiple TRPs, the multiple combination coefficient matrices can be combined into a combination coefficient matrix; the combination coefficient matrix is ​​subjected to combination coefficient normalization processing to obtain a processed combination coefficient matrix; there is a strongest combination coefficient in the processed combination coefficient matrix. In another example, for the combination coefficient matrices corresponding to multiple TRPs, each combination coefficient matrix can be subjected to combination coefficient normalization processing to obtain multiple processed combination coefficient matrices, and there is a strongest combination coefficient in each processed combination coefficient matrix, that is, multiple strongest combination coefficients. Wherein, there can be a strongest reference amplitude in the multiple combination coefficient matrices, and / or there can be a strongest amplitude.

[0100] Wherein, in the case where the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups, the terminal device can determine the combination coefficient matrix corresponding to multiple TRP groups. Wherein, each TRP group can correspond to a combination coefficient matrix. Wherein, in one example, for the combination coefficient matrices corresponding to multiple TRP groups, the multiple combination coefficient matrices can be combined into a combination coefficient matrix; the combination coefficient matrix is ​​subjected to combination coefficient normalization processing to obtain a processed combination coefficient matrix; there is a strongest combination coefficient in the processed combination coefficient matrix. In another example, for the combination coefficient matrices corresponding to multiple TRP groups, each combination coefficient matrix can be subjected to combination coefficient normalization processing to obtain multiple processed combination coefficient matrices, and there is a strongest combination coefficient in each processed combination coefficient matrix, that is, multiple strongest combination coefficients. Wherein, there can be a strongest reference amplitude in the multiple combination coefficient matrices, and / or there can be a strongest amplitude.

[0101] In an embodiment of the present application, the indication information of the strongest coefficient position can be determined according to the codebook parameter information configured by the network device, or according to the number of coefficients in the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups, or according to the number of non-zero coefficients in the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups. No specific limitation is made here and can be selected according to actual needs.

[0102] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; the coefficient position indication information is sent to the network device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combined coefficient matrix, so as to indicate the position of the coefficient in the combined coefficient matrix in the scenario of multiple TRPs or multiple TRP groups, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0103] See also Figure 4 , Figure 4 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 4 As shown, the method may include but is not limited to the following steps:

[0104] Step S401: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs.

[0105] Step S402: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs.

[0106] In the embodiment of the present application, each TRP may correspond to a combination coefficient matrix. For the combination coefficient matrices corresponding to multiple TRPs, the multiple combination coefficient matrices may be combined into a combination coefficient matrix; the combination coefficient matrix is ​​subjected to combination coefficient normalization processing to obtain a processed combination coefficient matrix; the processed combination coefficient matrix contains a strongest combination coefficient.

[0107] In one example, the coefficient position indication information can be directly used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs. In another example, the first TRP is not predefined and not configured by the network device, and the coefficient position indication information includes first indication information for indicating the first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP. In another example, the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by the network device.

[0108] In the embodiment of the present application, when the coefficient position indication information is directly used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs, the coefficient position indication information may be indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Indicates the total number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to multiple TRPs. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0109] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0110] In an embodiment of the present application, when the coefficient position indication information includes first indication information for indicating the first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, in one example, the first indication information can be obtained by Instructions; the second instruction information can be Indicates. Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

[0111] It should be noted that in the codebook parameter information configured by the network device, a different number of FD basis vectors can be configured for each TRP, or a different number of SD basis vectors can be configured for each TRP. The indication method of the first indication information and the second indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0112] in, Indicates rounding up of log2N. For example, when log2N is 0.8, It can be 1. Wherein, L in the formula of the second indication information n The number 2 in front indicates that there are two polarization directions. If the number of polarization directions is another number, 2 can be replaced by the actual number of polarization directions.

[0113] In an embodiment of the present application, when the coefficient position indication information includes first indication information for indicating the first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, in another example, the first indication information can be obtained by Instruction; The second instruction information can be any of the following instructions: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

[0114] The indicating method of the first indication information and the second indication information in this embodiment may be applicable to the Alt1A codebook structure.

[0115] Optionally, when the combination coefficient matrices corresponding to multiple TRPs are combined into a combination coefficient matrix, the combination coefficient matrix is ​​subjected to combination coefficient normalization processing, and in the processed combination coefficient matrix obtained, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the second indication information can be obtained by If the processed combination coefficient matrix has not been permuted in columns, so as to permute the column where the strongest combination coefficient is located to the first column, the second indication information can be instruct.

[0116] In an embodiment of the present application, when the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, in one example, the second indication information can be obtained by Indication. The indication method of the second indication information in this example can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0117] In another example, the second indication information may be indicated by any of the following: The indication method of the second indication information in this example can be applicable to the Alt1A codebook structure.

[0118] The following example is used to illustrate. Assume that the number of TRPs is 2, that is, there are 2 TRPs providing services to a terminal device located at the edge of a cell through CJT. The network device configures the number of FD basis vectors M corresponding to the two TRPs for the terminal device. n =4, the number of SD basis vectors corresponding to each TRP in one polarization direction is L n=2, the number of polarization directions is 2. Then the terminal device calculates the combination coefficient matrix corresponding to the two TRPs according to the downlink channel information from the two TRPs to the terminal device, and combines the two combination coefficient matrices to obtain a combination coefficient matrix:

[0119]

[0120] Assume that the combined coefficients including the maximum coefficient are right After normalizing the combination coefficient, we can get

[0121]

[0122] Assuming that the first TRP and the second TRP use the same reference amplitude in the same polarization direction, there are two polarization directions with reference amplitudes r0 and r1, and the strongest combination coefficient is 1 and is located in the first polarization direction, so the reference amplitude corresponding to the first polarization direction is r0=1. r0=1 and the strongest combination coefficient 1 are not reported. Terminal device report Indicates the combination coefficient matrix corresponding to which TRP the strongest combination coefficient is located, such as the first TRP; then report Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP.

[0123] Optionally, the terminal device may perform column permutation on the combination coefficient matrices corresponding to the two TRPs, and replace the column where the strongest combination coefficient is located with the first column in the combination coefficient matrix, to obtain

[0124]

[0125] At this point, the terminal device can report Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP.

[0126] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs, so as to indicate the coefficient position in the combination coefficient matrix in the scenario of multiple TRPs, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0127] See also Figure 5 , Figure 5is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 5 As shown, the method may include but is not limited to the following steps:

[0128] Step S501: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs.

[0129] Step S502: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; multiple strongest combination coefficients correspond one-to-one to multiple TRPs.

[0130] In the embodiment of the present application, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP. The indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n，0 Indicates the maximum number of non-zero coefficients of the nth TRP. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0131] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0132] Among them, optionally, for the combination coefficient matrix corresponding to each TRP, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP can be indicated by any one of the following:

[0133] Among them, optionally, for the combination coefficient matrix corresponding to each TRP, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix has not been permuted by columns to permute the column where the strongest combination coefficient is located to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP can be obtained by instruct.

[0134] The following example is used to illustrate. Assume that the number of TRPs is 2, that is, there are 2 TRPs providing services to a terminal device located at the edge of a cell through CJT. The network device configures the number of FD basis vectors M corresponding to the two TRPs for the terminal device. n =4, the number of SD basis vectors corresponding to each TRP in one polarization direction is L n =2, the number of polarization directions is 2. Then the terminal device calculates the combination coefficient matrix corresponding to the two TRPs according to the downlink channel information from the two TRPs to the terminal device, and combines the two combination coefficient matrices to obtain a combination coefficient matrix: First of all Normalize the combination coefficients and get

[0135]

[0136] in,

[0137]

[0138]

[0139] Among them, W 2，1 represents the combination coefficient matrix after normalization of the combination coefficients corresponding to the first TRP; W 2，2 Represents the combination coefficient matrix after normalization of the combination coefficients corresponding to the second TRP.

[0140] Among them, r0 and r1 represent the reference amplitudes of the first polarization direction and the second polarization direction corresponding to the first TRP, respectively; r2 and r3 represent the reference amplitudes of the first polarization direction and the second polarization direction corresponding to the second TRP, respectively. Assuming that r0 is the largest value among r0, r1, r2 and r3, and then normalizing r0, r1, r2 and r3, the reference amplitudes are r′0=1, r′1, r′2 and r′3, that is,

[0141]

[0142]

[0143] Terminal devices report separately Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, and indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the second TRP; then it can be reported Indicates the TRP with the strongest amplitude in the two combined coefficient matrices, or can be reported by Indicates the location of the strongest reference amplitude in the two combining coefficient matrices.

[0144] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; multiple strongest combination coefficients correspond to multiple TRPs one-to-one, so that in the scenario of multiple TRPs, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0145] See also Figure 5a , Figure 5a is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 5a As shown, the method may include but is not limited to the following steps:

[0146] Step S511: Receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs.

[0147] Step S512: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; multiple strongest combination coefficients correspond one-to-one to multiple TRPs.

[0148] In the embodiment of the present application, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP. The indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n，0 Indicates the maximum number of non-zero coefficients of each transmission layer of the nth TRP. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0149] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0150] Among them, optionally, for the combination coefficient matrix corresponding to each TRP, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP can be indicated by any one of the following:

[0151] Among them, optionally, for the combination coefficient matrix corresponding to each TRP, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix has not been permuted by columns to permute the column where the strongest combination coefficient is located to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP can be obtained by instruct.

[0152] Step S513: Send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRPs are TRPs other than the third TRP among the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0153] In an embodiment of the present application, in one example, the third TRP can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, and the indication information can indicate the third TRP. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the third TRP. It should be noted that the third TRP can be any one of the multiple TRPs.

[0154] Among them, the coefficient position indication information can be obtained by Indicates the third TRP; where N represents the number of TRPs.

[0155] In an embodiment of the present application, in another example, the third TRP can be predefined or configured by the network device. Specifically, the network device can configure the resource identifier of the Channel State Information-Reference Signal (CSI-RS) resource associated with each TRP, or the network device can configure the resource identifier of the CSI-RS resource associated with each TRP group. The network device and the terminal device agree or predefine the following content: the third TRP is the TRP corresponding to the minimum resource identifier among multiple resource identifiers, or the third TRP is the TRP corresponding to the maximum resource identifier among multiple resource identifiers.

[0156] It should be noted that, in other embodiments, the method of predefining or configuring TRP by network equipment can refer to the third TRP predefinition or configuration by network equipment here, and will not be described in detail in other embodiments.

[0157] In an embodiment of the present application, the coefficient may also include the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position of the strongest amplitude represents the TRP including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position of the strongest reference amplitude represents the TRP including the strongest reference amplitude.

[0158] It should be noted that the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP is the largest, and the strongest amplitude is the maximum value among multiple maximum amplitudes.

[0159] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; multiple strongest combination coefficients correspond to multiple TRPs one by one; the coefficient indication information is sent to the network device; wherein the coefficient indication information is used to indicate the strongest combination in the combination coefficient matrix corresponding to other TRPs. The reference amplitude and differential phase of the coefficient; the other TRPs are TRPs other than the third TRP in the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP, so as to indicate the position of the coefficient in the combination coefficient matrix in the scenario of multiple TRPs, so that the network device can determine the coefficient based on the coefficient position, and then determine the reference amplitude and differential phase, etc., and then perform subsequent processing to reduce the feedback overhead of the terminal device while maintaining system performance.

[0160] See also Figure 5b , Figure 5b is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 5b As shown, the method may include but is not limited to the following steps:

[0161] Step S521: Receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs.

[0162] Step S522: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; multiple strongest combination coefficients correspond one-to-one to multiple TRPs.

[0163] In the embodiment of the present application, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP. The indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n，0 Indicates the maximum number of non-zero coefficients of each transmission layer of the nth TRP. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0164] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0165] Among them, optionally, for the combination coefficient matrix corresponding to each TRP, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP can be indicated by any one of the following:

[0166] Among them, optionally, for the combination coefficient matrix corresponding to each TRP, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix has not been permuted by columns to permute the column where the strongest combination coefficient is located to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP can be obtained by instruct.

[0167] Step S523: Send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the multiple TRPs is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0168] In an embodiment of the present application, in one example, the third TRP can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, and the indication information can indicate the third TRP. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the third TRP. It should be noted that the third TRP can be any one of the multiple TRPs.

[0169] Among them, the coefficient position indication information can be obtained by Indicates the third TRP; where N represents the number of TRPs.

[0170] In another example of the embodiment of the present application, the third TRP can be predefined or configured by the network device. Specifically, the network device can configure the resource identifier of the CSI-RS resource associated with each TRP, or the network device can configure the resource identifier of the CSI-RS resource associated with each TRP group; the network device and the terminal device agree or predefine the following content: the third TRP is the TRP corresponding to the minimum resource identifier among multiple resource identifiers, or the third TRP is the TRP corresponding to the maximum resource identifier among multiple resource identifiers.

[0171] It should be noted that, in other embodiments, the method of predefining or configuring TRP by network equipment can refer to the third TRP predefinition or configuration by network equipment here, and will not be described in detail in other embodiments.

[0172] In the embodiment of the present application, in the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs; where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

[0173] In an embodiment of the present application, in one example, the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, which can indicate the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs.

[0174] In an embodiment of the present application, the coefficient may also include the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position of the strongest amplitude represents the TRP including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position of the strongest reference amplitude represents the TRP including the strongest reference amplitude.

[0175] It should be noted that the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP is the largest, and the strongest amplitude is the maximum value among multiple maximum amplitudes.

[0176] The following example is used to illustrate. Assume that the number of TRPs is 2, that is, there are 2 TRPs providing services to a terminal device located at the edge of a cell through CJT. The network device configures the number of FD basis vectors M corresponding to the two TRPs for the terminal device. n =4, the number of SD basis vectors corresponding to each TRP in one polarization direction is L n =2, the number of polarization directions is 2. Then the terminal device calculates the combination coefficient matrix corresponding to the two TRPs according to the downlink channel information from the two TRPs to the terminal device, and combines the two combination coefficient matrices to obtain a combination coefficient matrix: First of all Normalize the combination coefficients and get

[0177]

[0178] in,

[0179]

[0180]

[0181] Among them, W 2，1 represents the combination coefficient matrix after normalization of the combination coefficients corresponding to the first TRP; W 2，2 Represents the combination coefficient matrix after normalization of the combination coefficients corresponding to the second TRP.

[0182] Among them, r0 and r1 represent the reference amplitudes of the first polarization direction and the second polarization direction corresponding to the first TRP, respectively; r2 and r3 represent the reference amplitudes of the first polarization direction and the second polarization direction corresponding to the second TRP, respectively. Assuming that r0 is the largest value among r0, r1, r2 and r3, and then normalizing r0, r1, r2 and r3, the reference amplitudes are r′0=1, r′1, r′2 and r′3, that is,

[0183]

[0184]

[0185] In one example, the terminal devices report Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, and indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the second TRP; then the terminal device can or Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP. The reference amplitude r′0, differential amplitude and differential phase of the strongest combination coefficient corresponding to the first TRP are not reported. The terminal device can also Indicates the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the second TRP. The reference amplitude and differential phase of the strongest combination coefficient corresponding to the second TRP need to be quantized and reported, but the differential amplitude of the strongest combination coefficient corresponding to the second TRP does not need to be reported.

[0186] In another example, the terminal device may specify one of the TRPs, for example, by Indicates the first TRP; for the first TRP, the terminal device can determine the first TRP contained in the codebook parameters configured by the network non-zero coefficients, and all remaining TRPs contain non-zero coefficients; the terminal device passes and They respectively indicate the position of the strongest combination coefficient corresponding to the first TRP, and the position of the strongest combination coefficient corresponding to the remaining TRP (ie, the second TRP) in the combination coefficient matrix corresponding to all TRPs.

[0187] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; the multiple strongest combination coefficients correspond to the multiple TRPs one by one; the coefficient indication information is sent to the network device; wherein the coefficient indication information is used to indicate the reference amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP. degree and differential phase; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the multiple TRPs is indicated by the coefficient position indication information, so that in the scenario of multiple TRPs, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then determine the reference amplitude and differential phase, etc., and then perform subsequent processing to reduce the feedback overhead of the terminal device while maintaining system performance.

[0188] See also Figure 6 , Figure 6 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 6 As shown, the method may include but is not limited to the following steps:

[0189] Step S601: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0190] Step S602: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups.

[0191] In the embodiment of the present application, each TRP group may correspond to a combination coefficient matrix. For the combination coefficient matrices corresponding to multiple TRP groups, the multiple combination coefficient matrices may be combined into a combination coefficient matrix; the combination coefficient matrix is ​​subjected to combination coefficient normalization processing to obtain a processed combination coefficient matrix; the processed combination coefficient matrix contains a strongest combination coefficient.

[0192] In one example, the first TRP group is not predefined and is not configured by the network device, and the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group. In another example, the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

[0193] In an embodiment of the present application, when the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, in one example, the third indication information can be obtained by Instructions; the fourth instruction information can be obtained through Indicates. Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g，i represents the number of FD basis vectors of the i-th TRP in the g-th TRP group. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0194] The indication method of the third indication information and the fourth indication information in this embodiment can be applied to any one of the following codebook structures: Alt1A, Alt1B and Alt2. g，i The number 2 in front indicates that there are two polarization directions. If the number of polarization directions is another number, 2 can be replaced by the actual number of polarization directions.

[0195] In an embodiment of the present application, when the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, in another example, the third indication information can be obtained by Instruction; The fourth instruction information can be any of the following instructions: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

[0196] The indication method of the third indication information and the fourth indication information in this embodiment can be applicable to the Alt1A codebook structure.

[0197] Optionally, the combination coefficient matrices corresponding to multiple TRP groups are combined into a combination coefficient matrix, and the combination coefficient matrix is ​​normalized. In the processed combination coefficient matrix, if the processed combination coefficient matrix is ​​column-permuted, and the column where the strongest combination coefficient is located is permuted to the first column, the fourth indication information can be obtained by If the processed combination coefficient matrix has not been permuted in columns, so as to permute the column where the strongest combination coefficient is located to the first column, the fourth indication information can be instruct.

[0198] In an embodiment of the present application, when the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, in one example, the fourth indication information can be obtained by Indication. The fourth indication information indication method in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0199] In another example, the fourth indication information may be indicated by any one of the following: The fourth indication information indication method in this embodiment may be applicable to the Alt1A codebook structure.

[0200] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the multiple TRP groups, so as to indicate the coefficient position in the combination coefficient matrix in the scenario of multiple TRP groups, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0201] See also Figure 7 , Figure 7 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 7As shown, the method may include but is not limited to the following steps:

[0202] Step S701: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0203] Step S702: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0204] In the embodiment of the present application, the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group. Among them, the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group can be obtained by Instructions. Among them, I g represents the number of TRPs in the g-th TRP group; L g，i k represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g，0 Indicates the maximum number of non-zero coefficients of each transmission layer of the g-th TRP group. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0205] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0206] Among them, for the combination coefficient matrix corresponding to each TRP group, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP group can be obtained by instruct.

[0207] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRI group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups, so that in the scenario of multiple TRP groups, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0208] See also Figure 7a , Figure 7a is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 7a As shown, the method may include but is not limited to the following steps:

[0209] Step S711: Receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0210] Step S712: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0211] In the embodiment of the present application, the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group. Among them, the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group can be obtained by Instructions. Among them, I g represents the number of TRPs in the g-th TRP group; L g，i K represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g，0 Indicates the maximum number of non-zero coefficients of each transmission layer of the g-th TRP group. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0212] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0213] Among them, for the combination coefficient matrix corresponding to each TRP group, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP group can be obtained by instruct.

[0214] Step S713: Send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group in the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0215] In an embodiment of the present application, in one example, the third TRP group can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, and the indication information can indicate the third TRP group. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the third TRP group. It should be noted that the third TRP group can be any one of the multiple TRP groups.

[0216] Among them, the coefficient position indication information can be obtained by Indicates the third TRP group; where G represents the number of TRP groups.

[0217] In another example of the embodiment of the present application, the third TRP group can be predefined or configured by the network device. Specifically, the network device can configure the resource identifier of the CSI-RS resource associated with each TRP, or the network device can configure the resource identifier of the CSI-RS resource associated with each TRP group; the network device and the terminal device agree or predefine the following content: the third TRP group is the TRP group corresponding to the minimum resource identifier among multiple resource identifiers, or the third TRP group is the TRP group corresponding to the maximum resource identifier among multiple resource identifiers.

[0218] It should be noted that, in other embodiments, the method of predefining or configuring the TRP group by the network device can refer to the method of predefining or configuring the third TRP group by the network device here, and no detailed description will be given in other embodiments.

[0219] In an embodiment of the present application, the coefficient may also include the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0220] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups; the coefficient indication information is sent to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group in the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by the network device, so that in the scenario of multiple TRP groups, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0221] See also Figure 7b , Figure 7b is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 7b As shown, the method may include but is not limited to the following steps:

[0222] Step S721: Receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0223] Step S722: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0224] In the embodiment of the present application, the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group. Among them, the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group can be obtained by Instructions. Among them, I g represents the number of TRPs in the g-th TRP group; l g，i k represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group. The number of ports here refers to the number of CSI-RS ports of the channel state information reference signal; k g，0 Represents the maximum number of non-zero coefficients for each transport layer of the g-th TRP group.

[0225] The method for indicating the coefficient position indication information in this embodiment can be applicable to any one of the following codebook structures: Alt1A, Alt1B and Alt2.

[0226] Among them, for the combination coefficient matrix corresponding to each TRP group, in the processed combination coefficient matrix obtained by normalizing the combination coefficients of the combination coefficient matrix, if the processed combination coefficient matrix is ​​subjected to column permutation, and the column where the strongest combination coefficient is located is permuted to the first column, the indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the TRP group can be obtained by instruct.

[0227] Step S723: Send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0228] In an embodiment of the present application, in one example, the third TRP group can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, and the indication information can indicate the third TRP group. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the third TRP group. It should be noted that the third TRP group can be any one of the multiple TRP groups.

[0229] Among them, the coefficient position indication information can be obtained by Indicates the third TRP group; where G represents the number of TRP groups.

[0230] In another example of the embodiment of the present application, the third TRP group can be predefined or configured by the network device. Specifically, the network device can configure the resource identifier of the CSI-RS resource associated with each TRP, or the network device can configure the resource identifier of the CSI-RS resource associated with each TRP group; the network device and the terminal device agree or predefine the following content: the third TRP group is the TRP group corresponding to the minimum resource identifier among multiple resource identifiers, or the third TRP group is the TRP group corresponding to the maximum resource identifier among multiple resource identifiers.

[0231] It should be noted that, in other embodiments, the method of predefining or configuring the TRP group by the network device can refer to the method of predefining or configuring the third TRP group by the network device here, and no detailed description will be given in other embodiments.

[0232] In the embodiment of the present application, in the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to multiple TRP groups; where G represents the number of TRP groups; L g，i Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

[0233] In an embodiment of the present application, in one example, the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to multiple TRP groups can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, which can indicate the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to multiple TRP groups. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRP groups.

[0234] In an embodiment of the present application, the coefficient may also include the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0235] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups; the coefficient indication information is sent to the network device; wherein the coefficient indication information is used to indicate the strongest combination in the combination coefficient matrix corresponding to the fourth TRP group. The reference amplitude and differential phase in the coefficient; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information, so that in the scenario of multiple TRP groups, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0236] See also Figure 8 , Figure 8 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Figure 8 As shown, the method may include but is not limited to the following steps:

[0237] Step S801: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs.

[0238] Step S802: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRPs; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0239] In the embodiment of the present application, the coefficient position indication information can be obtained by Alternatively, it can be indicated by a bitmap of N bits, where N represents the number of TRPs.

[0240] In the embodiment of the present application, the strongest reference amplitude is not configured or predefined by the network device. In the case where the strongest reference amplitude is configured or predefined by the network device, the terminal device does not need to send indication information indicating the location of the strongest reference amplitude to the network device.

[0241] The information indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP can be found in Figure 5 The method of indicating the position of the strongest combination coefficient in will not be explained in detail here.

[0242] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combined coefficient matrix corresponding to multiple TRPs; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRPs; wherein the number of the strongest combined coefficients in the combined coefficient matrix corresponding to multiple TRPs is multiple, so that in the scenario of multiple TRPs, the coefficient position in the combined coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0243] See also Fig. 9 , Fig. 9 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Fig. 9 As shown, the method may include but is not limited to the following steps:

[0244] Step S901: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0245] Step S902: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRP groups; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0246] In the embodiment of the present application, the coefficient position indication information can be obtained by Alternatively, it can be indicated by a bitmap of Gbits, where G represents the number of TRP groups.

[0247] In the embodiment of the present application, the strongest reference amplitude is not configured or predefined by the network device. In the case where the strongest reference amplitude is configured or predefined by the network device, the terminal device does not need to send indication information indicating the location of the strongest reference amplitude to the network device.

[0248] The information indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group can be found in Figure 7 The method of indicating the position of the strongest combination coefficient in will not be explained in detail here.

[0249] In the coefficient indication method provided in the embodiment of the present application, the terminal device can receive the codebook parameter information sent by the network device; the codebook parameter information is used to determine the dimension of the combined coefficient matrix corresponding to multiple TRP groups; the coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups; wherein the number of the strongest combined coefficients in the combined coefficient matrix corresponding to the multiple TRP groups is multiple, so that in the scenario of multiple TRP groups, the coefficient position in the combined coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0250] See also Fig.10 , Fig.10 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Fig.10 As shown, the method may include but is not limited to the following steps:

[0251] Step S1001: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs.

[0252] Step S1002: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP with the strongest amplitude; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0253] In the embodiment of the present application, the coefficient position indication information can be obtained by Indicates, where N represents the number of TRPs.

[0254] It should be noted that, when there are multiple strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs, for one TRP, the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to the one TRP is the largest, that is, the position of the maximum amplitude in the one TRP can be determined according to the position of the strongest combination coefficient therein. The strongest amplitude is the maximum value among multiple maximum amplitudes, therefore, indicating which TRP includes the strongest amplitude, and combining the position of the strongest combination coefficient in the TRP, the position of the strongest amplitude can be determined. Therefore, the coefficient position indication information can be used to indicate the second TRP including the strongest amplitude among multiple TRPs.

[0255] The information indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP can be found in Figure 5 The method of indicating the position of the strongest combination coefficient in will not be explained in detail here.

[0256] In the coefficient indication method provided in the embodiment of the present application, a terminal device can receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRP groups; coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes a second TRP with the strongest amplitude; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple, so that in the scenario of multiple TRPs, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0257] See also Fig.11 , Fig.11 is a flow chart of another coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a terminal device. Fig.11 As shown, the method may include but is not limited to the following steps:

[0258] Step S1101: Receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0259] Step S1102: Send coefficient position indication information to the network device; wherein the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0260] In the embodiment of the present application, the coefficient position indication information can be obtained by Indicates. Where G represents the number of TRP groups.

[0261] It should be noted that, when there are multiple strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups, for one TRP group, the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to the one TRP group is the largest, that is, the position of the maximum amplitude in the one TRP group can be determined according to the position of the strongest combination coefficient. The strongest amplitude is the maximum value among multiple maximum amplitudes, so it is indicated which TRP group includes the strongest amplitude, and combined with the position of the strongest combination coefficient in the TRP group, the position of the strongest amplitude can be determined. Therefore, the coefficient position indication information can be used to indicate the second TRP group including the strongest amplitude among multiple TRP groups.

[0262] The information indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group can be found in Figure 7 The method of indicating the position of the strongest combination coefficient in will not be explained in detail here.

[0263] In the coefficient indication method provided in the embodiment of the present application, a terminal device can receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRP groups; coefficient position indication information is sent to the network device; wherein the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes a second TRP group with the strongest amplitude; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple, so that in the scenario of multiple TRP groups, the coefficient position in the combination coefficient matrix is ​​indicated, so that the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0264] It should be noted that the aforementioned multiple embodiments executed by the terminal device can be implemented independently or combined together in any manner.

[0265] See also Fig.12 , Fig.12 is a flow chart of a coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a network device. Fig.12 As shown, the method may include but is not limited to the following steps:

[0266] Step S1201: Send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups.

[0267] In an embodiment of the present application, in one example, codebook parameter information can be used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs. Among the multiple TRPs, each TRP corresponds to a combination coefficient matrix. In another example, codebook parameter information can be used to determine the dimension of a combination coefficient matrix corresponding to multiple TRP groups. Among the multiple TRP groups, each TRP group corresponds to a combination coefficient matrix. Among them, a TRP group can include one or more TRPs.

[0268] In the embodiment of the present application, the codebook parameter information includes: the number of TRP / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRP / TRP groups; wherein the number of basis vectors includes at least one of the following: the number of SD basis vectors; the number of FD basis vectors; the number of ports; the number of vector pairs of SD basis vectors and FD basis vectors. The number of ports here refers to the number of CSI-RS ports of the channel state information reference signal.

[0269] In an embodiment of the present application, when the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs, the codebook parameter information may include: the number of TRPs, the number of basis vectors corresponding to one TRP or multiple TRPs. In one example, the codebook parameter information may include: the number of TRPs, the number of basis vectors corresponding to one TRP. In another example, the codebook parameter information may include: the number of TRPs, the number of basis vectors corresponding to multiple TRPs. Among them, the number of basis vectors corresponding to multiple TRPs refers to the total number of corresponding basis vectors in all TRPs.

[0270] The multiple TRPs may be located in the same TRP group or in different TRP groups. The TRP groups to which any two TRPs belong may be the same or different, which is not specifically limited here.

[0271] Among them, the terminal device can determine the dimension of the combination coefficient matrix corresponding to multiple TRPs based on the codebook parameter information configured by the network device, and then determine the combination coefficient matrix corresponding to multiple TRPs.

[0272] In the case where the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups, the codebook parameter information may include: the number of TRP groups, the number of basis vectors corresponding to one TRP group or multiple TRP groups. In one example, the codebook parameter information may include: the number of TRP groups, the number of basis vectors corresponding to one TRP group. In another example, the codebook parameter information may include: the number of TRP groups, the number of basis vectors corresponding to multiple TRP groups. Among them, the number of basis vectors corresponding to multiple TRP groups refers to the total number of corresponding basis vectors in all TRP groups.

[0273] Among them, the terminal device can determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups based on the codebook parameter information configured by the network device, and then determine the combination coefficient matrix corresponding to multiple TRP groups.

[0274] Step S1202: Receive coefficient position indication information sent by the terminal device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combined coefficient matrix.

[0275] In the embodiment of the present application, the coefficient may include at least one of the following: the strongest combination coefficient, the strongest reference amplitude, and the strongest amplitude. For multiple TRPs or multiple TRP groups, the number of the strongest combination coefficients may be one or more.

[0276] Wherein, in the case where the codebook parameter information is used to determine the dimensions of the combination coefficient matrices corresponding to multiple TRPs, the terminal device can determine the combination coefficient matrices corresponding to the multiple TRPs according to the codebook parameter information. Wherein, each TRP can correspond to a combination coefficient matrix. Wherein, in the case where the codebook parameter information is used to determine the dimensions of the combination coefficient matrices corresponding to multiple TRP groups, the terminal device can determine the combination coefficient matrices corresponding to the multiple TRP groups according to the codebook parameter information. Wherein, each TRP group can correspond to a combination coefficient matrix.

[0277] In the coefficient indication method provided in the embodiment of the present application, the network device can send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; the coefficient position indication information sent by the terminal device is received; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combined coefficient matrix, so as to indicate the position of the coefficient in the combined coefficient matrix in the scenario of multiple TRPs or multiple TRP groups, and the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0278] See also Fig.13 , Fig.13is a flow chart of a coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a network device. Fig.13 As shown, the method may include but is not limited to the following steps:

[0279] Step S1301: Send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs.

[0280] Step S1302: Receive coefficient position indication information sent by the terminal device; the coefficient includes the strongest combination coefficient, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs.

[0281] In one example, the number of the strongest combination coefficients is one. In another example, the number of the strongest combination coefficients is multiple.

[0282] Among them, in a case where the number of the strongest combination coefficients is one, in an example, the coefficient position indication information includes first indication information for indicating the first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP; or, the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by the network device.

[0283] In one case, the first indication information can be provided by Instructions; the second instruction information can be Indicates. Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Indicates the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0284] In another case, the first indication information can be provided by Instruction; The second instruction information can be any of the following instructions: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

[0285] In another example, the coefficient position indication information may be indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transport layer corresponding to multiple TRPs.

[0286] Among them, when the number of the strongest combination coefficients is multiple, the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

[0287] In this case, the indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP may be indicated by any of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n，0 Represents the maximum number of non-zero coefficients per transport layer of the nth TRP.

[0288] In an embodiment of the present application, when the number of the strongest combination coefficients is multiple, in one example, the network device may also receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRPs are TRPs other than the third TRP in the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0289] In an embodiment of the present application, when the number of the strongest combination coefficients is multiple, in another example, the network device may also receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0290] In one example, the third TRP can be indicated by the coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, and the indication information can indicate the third TRP. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the third TRP. It should be noted that the third TRP can be any one of the multiple TRPs.

[0291] Among them, the coefficient position indication information can be obtained by Indicates the third TRP; where N represents the number of TRPs.

[0292] In another example, the third TRP can be predefined or configured by the network device. Specifically, the network device can configure the resource identifier of the Channel State Information-Reference Signal (CSI-RS) resource associated with each TRP, or the network device can configure the resource identifier of the CSI-RS resource associated with each TRP group; the network device and the terminal device agree or predefine the following content: the third TRP is the TRP corresponding to the minimum resource identifier among multiple resource identifiers, or the third TRP is the TRP corresponding to the maximum resource identifier among multiple resource identifiers.

[0293] It should be noted that, in other embodiments, the method of predefining or configuring TRP by network equipment can refer to the third TRP predefinition or configuration by network equipment here, and will not be described in detail in other embodiments.

[0294] In the embodiment of the present application, in the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs; where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

[0295] In an embodiment of the present application, in one example, the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, which can indicate the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRPs.

[0296] In an embodiment of the present application, the coefficient may also include the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position of the strongest amplitude represents the TRP including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position of the strongest reference amplitude represents the TRP including the strongest reference amplitude.

[0297] It should be noted that the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP is the largest, and the strongest amplitude is the maximum value among multiple maximum amplitudes.

[0298] In the coefficient indication method provided in the embodiment of the present application, the network device can send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs; the coefficient position indication information sent by the terminal device is received; the coefficient includes the strongest combination coefficient, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs, so as to indicate the coefficient position in the combination coefficient matrix in the scenario of multiple TRPs, and the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0299] See also Fig.14 , Fig.14 is a flow chart of a coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a network device. Fig.14 As shown, the method may include but is not limited to the following steps:

[0300] Step S1401: Send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0301] Step S1402: Receive coefficient position indication information sent by the terminal device; the coefficient includes the strongest combination coefficient, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups.

[0302] In one example, the number of the strongest combination coefficients is one. In another example, the number of the strongest combination coefficients is multiple.

[0303] Among them, when the number of the strongest combination coefficients is one, in one example, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

[0304] In one case, the third indication information can be provided by Instructions; the fourth instruction information can be obtained through Indicates. Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g，i represents the number of FD basis vectors of the i-th TRP in the g-th TRP group. The number of ports here refers to the number of channel state information reference signal CSI-RS ports.

[0305] In another case, the third indication information can be provided by Instruction; The fourth instruction information can be any of the following instructions: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

[0306] Among them, when the number of the strongest combination coefficients is multiple, the coefficients include the strongest combination coefficient and the coefficient position indication information, which is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0307] In this case, the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group can be obtained by Instructions. Among them, I g represents the number of TRPs in the g-th TRP group; L g，i K represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g，0 Represents the maximum number of non-zero coefficients for each transport layer of the g-th TRP group.

[0308] In an embodiment of the present application, when the number of the strongest combination coefficients is multiple, in one example, the network device can also receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group in the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0309] In an embodiment of the present application, when the number of the strongest combination coefficients is multiple, in another example, the network device may also receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0310] In an embodiment of the present application, in one example, the third TRP group can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, and the indication information can indicate the third TRP group. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the third TRP group. It should be noted that the third TRP group can be any one of the multiple TRP groups.

[0311] Among them, the coefficient position indication information can be obtained by Indicates the third TRP group; where G represents the number of TRP groups.

[0312] In another example of the embodiment of the present application, the third TRP group can be predefined or configured by the network device. Specifically, the network device can configure the resource identifier of the CSI-RS resource associated with each TRP, or the network device can configure the resource identifier of the CSI-RS resource associated with each TRP group; the network device and the terminal device agree or predefine the following content: the third TRP group is the TRP group corresponding to the minimum resource identifier among multiple resource identifiers, or the third TRP group is the TRP group corresponding to the maximum resource identifier among multiple resource identifiers.

[0313] It should be noted that, in other embodiments, the method of predefining or configuring the TRP group by the network device can refer to the method of predefining or configuring the third TRP group by the network device here, and no detailed description will be given in other embodiments.

[0314] In the embodiment of the present application, in the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups; wherein G represents the number of TRP groups; L g，i Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

[0315] In an embodiment of the present application, in one example, the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to multiple TRP groups can be indicated by coefficient position indication information. For example, in one method, the coefficient position indication information can also include an indication information, which can indicate the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to multiple TRP groups. In another method, the bits used to indicate the positions of other coefficients in the coefficient position indication information can be reused to indicate the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to multiple TRP groups.

[0316] In an embodiment of the present application, the coefficient may also include the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0317] In the coefficient indication method provided in the embodiment of the present application, the network device can send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups; the coefficient position indication information sent by the receiving terminal device; the coefficient includes the strongest combination coefficient, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups, so as to indicate the coefficient position in the combination coefficient matrix in the scenario of multiple TRP groups. The network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0318] See also Fig.15 , Fig.15 is a flow chart of a coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a network device. Fig.15 As shown, the method may include but is not limited to the following steps:

[0319] Step S1501: Send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups.

[0320] In one example, the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs. In another example, the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0321] Step S1502: Receive coefficient position indication information sent by the terminal device; the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups is multiple.

[0322] In one example, the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRPs. The coefficient position indication information can be obtained by Indicated by, or indicated by, a bitmap of N bits, where N represents the number of TRPs.

[0323] In another example, the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups. The coefficient position indication information can be obtained by Indicated, or indicated by a bitmap of Gbits, where G represents the number of TRP groups.

[0324] In the embodiment of the present application, the strongest reference amplitude is not configured or predefined by the network device. In the case where the strongest reference amplitude is configured or predefined by the network device, the terminal device does not need to send indication information indicating the location of the strongest reference amplitude to the network device.

[0325] In the coefficient indication method provided in the embodiment of the present application, the network device can send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; the coefficient position indication information sent by the receiving terminal device; the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; wherein the number of the strongest combined coefficients in the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups is multiple, so that in the scenario of multiple TRPs or multiple TRP groups, the coefficient position in the combined coefficient matrix is ​​indicated, and the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0326] See also Fig.16 , Fig.16 is a flow chart of a coefficient indication method provided in an embodiment of the present application. The coefficient indication method is executed by a network device. Fig.16 As shown, the method may include but is not limited to the following steps:

[0327] Step S1601: Send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups.

[0328] In one example, the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs. In another example, the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRP groups.

[0329] Step S1602: receiving coefficient position indication information sent by the terminal device; the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP with the strongest amplitude; or, used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups is multiple.

[0330] In one example, the coefficient position indication information is used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to the multiple TRPs, and the position representation includes the second TRP with the strongest amplitude. Indicates, where N represents the number of TRPs.

[0331] It should be noted that, when there are multiple strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs, for one TRP, the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to the one TRP is the largest, that is, the position of the maximum amplitude in the one TRP can be determined according to the position of the strongest combination coefficient therein. The strongest amplitude is the maximum value among multiple maximum amplitudes, therefore, indicating which TRP includes the strongest amplitude, and combining the position of the strongest combination coefficient in the TRP, the position of the strongest amplitude can be determined. Therefore, the coefficient position indication information can be used to indicate the second TRP including the strongest amplitude among multiple TRPs.

[0332] In another example, the coefficient position indication information is used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude. Indicates. Where G represents the number of TRP groups.

[0333] It should be noted that, when there are multiple strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups, for one TRP group, the amplitude of the strongest combination coefficient in the combination coefficient matrix corresponding to the one TRP group is the largest, that is, the position of the maximum amplitude in the one TRP group can be determined according to the position of the strongest combination coefficient. The strongest amplitude is the maximum value among multiple maximum amplitudes, so it is indicated which TRP group includes the strongest amplitude, and combined with the position of the strongest combination coefficient in the TRP group, the position of the strongest amplitude can be determined. Therefore, the coefficient position indication information can be used to indicate the second TRP group including the strongest amplitude among multiple TRP groups.

[0334] In the coefficient indication method provided in the embodiment of the present application, the network device can send codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups; the coefficient position indication information sent by the receiving terminal device; the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP with the strongest amplitude; or, it is used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein, the number of the strongest combined coefficients in the combined coefficient matrix corresponding to multiple TRPs or multiple TRP groups is multiple, so that in the scenario of multiple TRPs or multiple TRP groups, the coefficient position in the combined coefficient matrix is ​​indicated, and the network device can determine the coefficient based on the coefficient position, and then perform subsequent processing, thereby reducing the feedback overhead of the terminal device while maintaining system performance.

[0335] It should be noted that the aforementioned multiple embodiments executed by the network device may be implemented independently or in combination in any manner.

[0336] In the embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspectives of the network device and the terminal device, respectively. In order to implement the functions in the methods provided by the embodiments of the present application, the network device and the first terminal device may include a hardware structure and a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. A function of the functions may be executed in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0337] See also Fig.17 , is a structural diagram of a communication device 170 provided in an embodiment of the present application. Fig.17 The communication device 170 shown may include a transceiver unit 1701 and a processing unit 1702. The transceiver unit 1701 may include a sending module and / or a receiving module, the sending module is used to implement a sending function, the receiving module is used to implement a receiving function, and the transceiver unit 1701 may implement a sending function and / or a receiving function.

[0338] The communication device 170 may be a terminal device, a device in a terminal device, or a device that can be used in conjunction with a terminal device. Alternatively, the communication device 170 may be a network device, a device in a network device, or a device that can be used in conjunction with a network device.

[0339] The communication device 170 is a terminal device:

[0340] The transceiver unit 1701 is used to receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups;

[0341] The transceiver unit 1701 is further used to send coefficient position indication information to the network device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0342] Optionally, the codebook parameter information includes: the number of TRPs / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRPs / TRP groups;

[0343] The number of basis vectors includes at least one of the following:

[0344] Number of SD basis vectors; Number of FD basis vectors; Number of ports; Number of vector pairs of SD basis vectors and FD basis vectors.

[0345] Optionally, the coefficient includes at least one of the following: the strongest combination coefficient, the strongest reference amplitude, and the strongest amplitude.

[0346] Optionally, the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs.

[0347] Optionally, the coefficient position indication information includes first indication information for indicating a first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP; or, the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by a network device.

[0348] Optionally, the first indication information is provided by Instruction; the second instruction information, through Indication; where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

[0349] Optionally, the first indication information is provided by Instruction; the second instruction information is indicated by any one of the following: Where N represents the number of TRPs; Ln Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in a combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

[0350] Optionally, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

[0351] Optionally, the coefficient includes a strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

[0352] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n，0 Represents the maximum number of non-zero coefficients per transport layer of the nth TRP.

[0353] Optionally, the method also includes: sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRP is a TRP other than the third TRP among the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0354] Optionally, the method also includes: sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the multiple TRPs is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0355] Optionally, in the coefficient position indication information, Indicates the third TRP; wherein N represents the number of TRPs.

[0356] Optionally, in the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs; wherein N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

[0357] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest amplitude includes the TRP of the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest reference amplitude includes the TRP of the strongest reference amplitude.

[0358] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups.

[0359] Optionally, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

[0360] Optionally, the third indication information is provided by Instruction; the fourth instruction information, through Indication; where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g，i Represents the number of FD basis vectors of the i-th TRP in the g-th TRP group.

[0361] Optionally, the third indication information is provided by Instruction; the fourth instruction information is indicated by any one of the following: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

[0362] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0363] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group is obtained by Instructions; among them, I g represents the number of TRPs in the g-th TRP group; L g，i K represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g，0 Represents the maximum number of non-zero coefficients for each transport layer of the g-th TRP group.

[0364] Optionally, the method also includes: sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group among the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0365] Optionally, the method also includes: sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0366] Optionally, in the coefficient position indication information, Indicates the third TRP group; wherein G represents the number of TRP groups.

[0367] Optionally, in the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups; wherein G represents the number of TRP groups; L g，i Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

[0368] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0369] Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRPs; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0370] Optionally, the coefficient position indication information is provided by Indicate, or, indicate through a bitmap of N bits; where N represents the number of TRPs.

[0371] Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRP groups; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0372] Optionally, the coefficient position indication information is provided by Indicate, or, indicate through a bitmap of G bits; where G represents the number of TRP groups.

[0373] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP of the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0374] Optionally, the coefficient position indication information is provided by Indication; where N represents the number of TRPs.

[0375] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0376] Optionally, the coefficient position indication information is provided by Indication; where G represents the number of TRP groups.

[0377] The communication device 170 is a network device:

[0378] The transceiver unit 1701 is used to send codebook parameter information to a terminal device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups; and receive coefficient position indication information sent by the terminal device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0379] Optionally, the codebook parameter information includes: the number of TRPs / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRPs / TRP groups;

[0380] The number of basis vectors includes at least one of the following:

[0381] Number of SD basis vectors; Number of FD basis vectors; Number of ports; Number of vector pairs of SD basis vectors and FD basis vectors.

[0382] Optionally, the coefficient includes at least one of the following: the strongest combination coefficient, the strongest reference amplitude, and the strongest amplitude.

[0383] Optionally, the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs.

[0384] Optionally, the coefficient position indication information includes first indication information for indicating a first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP; or, the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by a network device.

[0385] Optionally, the first indication information is provided by Instruction; the second instruction information, through Indication; where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

[0386] Optionally, the first indication information is provided by Instruction; the second instruction information is indicated by any one of the following: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in a combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

[0387] Optionally, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

[0388] Optionally, the coefficient includes a strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

[0389] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n，0 Represents the maximum number of non-zero coefficients per transport layer of the nth TRP.

[0390] Optionally, the method also includes: receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRP is a TRP other than the third TRP among the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by a network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0391] Optionally, the method also includes: receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the multiple TRPs is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0392] Optionally, in the coefficient position indication information, Indicates the third TRP; wherein N represents the number of TRPs.

[0393] Optionally, in the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs; wherein N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

[0394] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest amplitude includes the TRP of the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest reference amplitude includes the TRP of the strongest reference amplitude.

[0395] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups.

[0396] Optionally, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

[0397] Optionally, the third indication information is provided by Instruction; the fourth instruction information, through Indication; where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g，i Represents the number of FD basis vectors of the i-th TRP in the g-th TRP group.

[0398] Optionally, the third indication information is provided by Instruction; the fourth instruction information is indicated by any one of the following: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

[0399] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0400] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group is obtained by Instructions; among them, I g represents the number of TRPs in the g-th TRP group; L g，i K represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g，0 Represents the maximum number of non-zero coefficients for each transport layer of the g-th TRP group.

[0401] Optionally, the method also includes: receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group among the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by a network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0402] Optionally, the method also includes: receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0403] Optionally, in the coefficient position indication information, Indicates the third TRP group; wherein G represents the number of TRP groups.

[0404] Optionally, in the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups; wherein G represents the number of TRP groups; L g，i Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

[0405] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0406] Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRPs; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0407] Optionally, the coefficient position indication information is provided by Indication, or, indication by a bitmap of N bits; wherein N represents the number of TRPs. Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to the multiple TRP groups; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to the multiple TRP groups is multiple.

[0408] Optionally, the coefficient position indication information is provided by Indicate, or, indicate through a bitmap of G bits; where G represents the number of TRP groups.

[0409] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP of the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0410] Optionally, the coefficient position indication information is provided by Indication; where N represents the number of TRPs.

[0411] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0412] Optionally, the coefficient position indication information is provided by Indication; where G represents the number of TRP groups.

[0413] See also Fig.18 , Fig.181 is a schematic diagram of the structure of another communication device 180 provided in an embodiment of the present application. The communication device 180 may be a network device, or a terminal device, or a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0414] The communication device 180 may include one or more processors 1801. The processor 1801 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process the data of the computer program.

[0415] Optionally, the communication device 180 may further include one or more memories 1802, on which a computer program 1803 may be stored, and the processor 1801 executes the computer program 1803 so that the communication device 180 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory 1802. The communication device 180 and the memory 1802 may be provided separately or integrated together.

[0416] Optionally, the communication device 180 may further include a transceiver 1804 and an antenna 1805. The transceiver 1804 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function. The transceiver 1804 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

[0417] Optionally, the communication device 180 may further include one or more interface circuits 1806. The interface circuit 1806 is used to receive code instructions and transmit them to the processor 1801. The processor 1801 runs the code instructions to enable the communication device 80 to execute the method described in the above method embodiment.

[0418] The communication device 180 is a terminal device: the transceiver 1804 is used to perform Figure 3 Steps S301 and S302 in the embodiment; Figure 4 Steps S401 and S402 in; Figure 5 Steps S501 and S502 in the embodiment; Figure 6 Steps S601 and S602 in the embodiment; Figure 7 Steps S701 and S702 in the embodiment; Figure 8Steps S801 and S802 in; Fig. 9 Steps S901 and S902 in the embodiment; Fig.10 Steps S1001 and S1002 in; Fig.11 Steps S1101 and S1201 in .

[0419] The communication device 180 is a network device: the transceiver 1804 is used to perform Fig.12 Steps S1201 and S1202 in; Fig.13 Steps S1301 and S1302 in; Fig.14 Steps S1401 and S1402 in; Fig.15 Steps S1501 and S1502 in; Fig.16 Steps S1601 and S1602 in .

[0420] In one implementation, the processor 1801 may include a transceiver for implementing the receiving and sending 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 the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

[0421] In one implementation, the processor 1801 may store a computer program 1803, which runs on the processor 1801 and enables the communication device 180 to perform the method described in the above method embodiment. The computer program 1803 may be fixed in the processor 1801, in which case the processor 1801 may be implemented by hardware.

[0422] In one implementation, the communication device 180 may include a circuit that can implement the functions of sending, receiving or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channelmetal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0423] The communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in the present application is not limited thereto, and the structure of the communication device may not be limited thereto. Fig.18 The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0424] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0425] (2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and computer programs;

[0426] (3) ASIC, such as modem;

[0427] (4) Modules that can be embedded in other devices;

[0428] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0429] (6)Others

[0430] For the case where the communication device may be a chip or a chip system, see Fig.19 Schematic diagram of the chip structure shown. Fig.19 The chip shown includes a processor 1901 and an interface 1902. The number of the processor 1901 may be one or more, and the number of the interface 1902 may be multiple.

[0431] For the case where the chip is used to implement the functions of the terminal device in the embodiment of the present application:

[0432] Interface 1902 is used to receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups; and to send coefficient position indication information to the network device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0433] Optionally, the codebook parameter information includes: the number of TRPs / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRPs / TRP groups;

[0434] The number of basis vectors includes at least one of the following:

[0435] Number of SD basis vectors; Number of FD basis vectors; Number of ports; Number of vector pairs of SD basis vectors and FD basis vectors.

[0436] Optionally, the coefficient includes at least one of the following: the strongest combination coefficient, the strongest reference amplitude, and the strongest amplitude.

[0437] Optionally, the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs.

[0438] Optionally, the coefficient position indication information includes first indication information for indicating a first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP; or, the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by a network device.

[0439] Optionally, the first indication information is provided by Instruction; the second instruction information, through Indication; where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; Mn Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

[0440] Optionally, the first indication information is provided by Instruction; the second instruction information is indicated by any one of the following: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in a combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

[0441] Optionally, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

[0442] Optionally, the coefficient includes a strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

[0443] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transport layer corresponding to the nth TRP.

[0444] Optionally, interface 1902 is also used to send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRP is a TRP other than the third TRP among the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0445] Optionally, interface 1902 is also used to send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the multiple TRPs is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0446] Optionally, in the coefficient position indication information, Indicates the third TRP; wherein N represents the number of TRPs.

[0447] Optionally, in the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs; wherein N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

[0448] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest amplitude includes the TRP of the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest reference amplitude includes the TRP of the strongest reference amplitude.

[0449] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups.

[0450] Optionally, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

[0451] Optionally, the third indication information is provided by Instruction; the fourth instruction information, through Indication; where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g，i Represents the number of FD basis vectors of the i-th TRP in the g-th TRP group.

[0452] Optionally, the third indication information is provided by Instruction; the fourth instruction information is indicated by any one of the following: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

[0453] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0454] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group is obtained by Instructions; among them, I g represents the number of TRPs in the g-th TRP group; L g，i Represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group.

[0455] Optionally, interface 1902 is also used to send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group among the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0456] Optionally, interface 1902 is also used to send coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0457] Optionally, in the coefficient position indication information, Indicates the third TRP group; wherein G represents the number of TRP groups.

[0458] Optionally, in the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups; wherein G represents the number of TRP groups; L g，t Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

[0459] Optionally, the coefficient further includes the strongest amplitude and / or the strongest reference amplitude;

[0460] The coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0461] Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRPs; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0462] Optionally, the coefficient position indication information is provided by Indicate, or, indicate through a bitmap of N bits; where N represents the number of TRPs.

[0463] Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRP groups; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0464] Optionally, the coefficient position indication information is provided by Indicate, or, indicate through a bitmap of G bits; where G represents the number of TRP groups.

[0465] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP of the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0466] Optionally, the coefficient position indication information is provided by Indication; where N represents the number of TRPs.

[0467] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0468] Optionally, the coefficient position indication information is provided by Indication; where G represents the number of TRP groups.

[0469] For the case where the chip is used to implement the functions of the network device in the embodiment of the present application:

[0470] Interface 1902 is used to send codebook parameter information to a terminal device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups; receive coefficient position indication information sent by the terminal device; wherein the coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix.

[0471] Optionally, the codebook parameter information includes: the number of TRPs / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRPs / TRP groups;

[0472] The number of basis vectors includes at least one of the following:

[0473] Number of SD basis vectors; Number of FD basis vectors; Number of ports; Number of vector pairs of SD basis vectors and FD basis vectors.

[0474] Optionally, the coefficient includes at least one of the following: the strongest combination coefficient, the strongest reference amplitude, and the strongest amplitude.

[0475] Optionally, the coefficient includes the strongest combination coefficient, the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs.

[0476] Optionally, the coefficient position indication information includes first indication information for indicating a first TRP corresponding to the strongest combination coefficient, and second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP; or, the coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by a network device.

[0477] Optionally, the first indication information is provided by Instruction; the second instruction information, through Indication; where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

[0478] Optionally, the first indication information is provided by Instruction; the second instruction information is indicated by any one of the following: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in a combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

[0479] Optionally, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

[0480] Optionally, the coefficient includes a strongest combination coefficient, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

[0481] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transport layer corresponding to the nth TRP.

[0482] Optionally, interface 1902 is also used to receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRP is a TRP other than the third TRP among the multiple TRPs; the third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0483] Optionally, interface 1902 is also used to receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the multiple TRPs except the third TRP; the third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the multiple TRPs is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

[0484] Optionally, in the coefficient position indication information, Indicates the third TRP; wherein N represents the number of TRPs.

[0485] Optionally, in the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs; wherein N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

[0486] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest amplitude includes the TRP of the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in a combined coefficient matrix corresponding to multiple TRPs, and the position representation of the strongest reference amplitude includes the TRP of the strongest reference amplitude.

[0487] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups.

[0488] Optionally, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, the coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

[0489] Optionally, the third indication information is provided by Instruction; the fourth instruction information, through Indication; where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g，i Represents the number of FD basis vectors of the i-th TRP in the g-th TRP group.

[0490] Optionally, the third indication information is provided by Instruction; the fourth instruction information is indicated by any one of the following: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g，i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

[0491] Optionally, the coefficients include the strongest combination coefficients, the number of the strongest combination coefficients is multiple, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

[0492] Optionally, the coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; wherein the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group is obtained by Instructions; among them, I g represents the number of TRPs in the g-th TRP group; L g，i Represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group.

[0493] Optionally, interface 1902 is also used to receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group among the multiple TRP groups; the third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by the network device; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0494] Optionally, interface 1902 is also used to receive coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the multiple TRP groups except the third TRP group; the third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by the network device; the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the multiple TRP groups is indicated by the coefficient position indication information; wherein the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

[0495] Optionally, in the coefficient position indication information, Indicates the third TRP group; wherein G represents the number of TRP groups.

[0496] Optionally, in the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to multiple TRP groups; wherein G represents the number of TRP groups; Lq,i represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

[0497] Optionally, the coefficient also includes the strongest amplitude and / or the strongest reference amplitude; the coefficient position indication information is also used to indicate the position of the strongest amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, the coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

[0498] Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to multiple TRPs; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0499] Optionally, the coefficient position indication information is provided by Indication, or, indication by a bitmap of N bits; wherein N represents the number of TRPs. Optionally, the coefficient includes the strongest reference amplitude; the coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to the multiple TRP groups; wherein the number of the strongest combination coefficients in the combination coefficient matrix corresponding to the multiple TRP groups is multiple.

[0500] Optionally, the coefficient position indication information is provided by Indicate, or, indicate through a bitmap of G bits; where G represents the number of TRP groups.

[0501] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRPs, and the position representation includes the second TRP of the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

[0502] Optionally, the coefficient position indication information is provided by Indication; where N represents the number of TRPs.

[0503] Optionally, the coefficient includes the strongest amplitude, and the number of the strongest amplitude is one; the coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to multiple TRP groups, and the position representation includes the second TRP group with the strongest amplitude; wherein, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

[0504] Optionally, the coefficient position indication information is provided by Indication; where G represents the number of TRP groups.

[0505] Optionally, the chip further includes a memory 1903, and the memory 1903 is used to store necessary computer programs and data.

[0506] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application may be implemented by electronic hardware, computer software, or a combination of the two. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present application.

[0507] The present application also provides a communication system, which includes the aforementioned Fig.17 In the embodiment, the communication device as the terminal device and the communication device as the network device, or the system includes the aforementioned Fig.18 The communication device in the embodiment serves as a terminal device and the communication device serves as a network device.

[0508] The present application also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0509] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0510] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of 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, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0511] A person skilled in the art may understand that the various numerical numbers such as first and second involved in the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application, and also indicate the order of precedence.

[0512] At least one in the present application can also be described as one or more, and a plurality can be two, three, four or more, which is not limited in the present application. In the embodiments of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

[0513] The corresponding relationships shown in each table in the present application can be configured or predefined. The values ​​of the information in each table are only examples and can be configured as other values, which are not limited by the present application. When configuring the corresponding relationship between the information and each parameter, it is not necessarily required to configure all the corresponding relationships illustrated in each table. For example, in the table in the present application, the corresponding relationships shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that can be understood by the communication device, and the values ​​or representations of the parameters can also be other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables.

[0514] The predefined in the present application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0515] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0516] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0517] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A coefficient indication method, characterized in that: Executed by a terminal device, the method includes: Receiving codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups; Sending coefficient position indication information to the network device; The coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix; The coefficient includes the strongest combination coefficient; when the number of the strongest combination coefficient is one and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

2. The method according to claim 1, characterized in that The codebook parameter information includes: the number of TRPs / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRPs / TRP groups; The number of basis vectors includes at least one of the following: The number of SD basis vectors; The number of FD basis vectors; Number of ports; The number of vector pairs of SD basis vectors and FD basis vectors.

3. The method according to claim 1, characterized in that The coefficient also includes at least one of the following: the strongest reference amplitude, the strongest amplitude.

4. The method according to claim 1, characterized in that: The coefficient position indication information includes first indication information for indicating a first TRP corresponding to the strongest combination coefficient, and second indication information for indicating a position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP; or, The coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by a network device.

5. The method according to claim 4, characterized in that The first indication information is provided by instruct; The second indication information is provided by instruct; Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

6. The method according to claim 4, characterized in that The first indication information is provided by instruct; The second indication information is indicated by any one of the following: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in a combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

7. The method according to claim 1, characterized in that When there are multiple strongest combination coefficients and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP, the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

8. The method according to claim 7, characterized in that The coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; The indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n,0 Represents the maximum number of non-zero coefficients per transport layer of the nth TRP.

9. The method according to claim 7, characterized in that: The method further comprises: Sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRPs are TRPs other than the third TRP in the multiple TRPs; The third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by a network device; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

10. The method according to claim 7, characterized in that The method further comprises: Sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the plurality of TRPs except the third TRP; The third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by a network device; The position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs is indicated by the coefficient position indication information; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

11. The method according to claim 9 or 10, characterized in that: In the coefficient position indication information, indicating the third TRP; Where N represents the number of TRPs.

12. The method according to claim 10, characterized in that In the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs; Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

13. The method according to claim 7, characterized in that The coefficients also include the strongest amplitude and / or the strongest reference amplitude; The coefficient position indication information is further used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the plurality of TRPs, wherein the position of the strongest amplitude represents the TRP including the strongest amplitude; and / or, The coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRPs, and the position of the strongest reference amplitude represents the TRP including the strongest reference amplitude.

14. The method according to claim 1, characterized in that In the case where the number of the strongest combination coefficient is one and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, The coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

15. The method according to claim 14, characterized in that The third indication information is provided by instruct; The fourth indication information is provided by instruct; Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g,i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g,i Represents the number of FD basis vectors of the i-th TRP in the g-th TRP group.

16. The method according to claim 14, characterized in that The third indication information is provided by instruct; The fourth indication information is indicated by any one of the following: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g,i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

17. The method according to claim 1, characterized in that When there are multiple strongest combination coefficients and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group, the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

18. The method according to claim 17, characterized in that The coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; Among them, the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group is obtained by instruct; Among them, I g represents the number of TRPs in the g-th TRP group; L g,i K represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g,0 Represents the maximum number of non-zero coefficients for each transport layer of the g-th TRP group.

19. The method according to claim 17, characterized in that The method further comprises: Sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group among the multiple TRP groups; The third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by a network device; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

20. The method according to claim 17, characterized in that The method further comprises: Sending coefficient indication information to the network device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the plurality of TRP groups except the third TRP group; The third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by a network device; The position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups is indicated by the coefficient position indication information; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

21. The method according to claim 19 or 20, characterized in that In the coefficient position indication information, indicating the third TRP group; Where G represents the number of TRP groups.

22. The method according to claim 20, characterized in that In the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups; Where G represents the number of TRP groups; L g,i Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

23. The method according to claim 17, characterized in that The coefficients also include the strongest amplitude and / or the strongest reference amplitude; The coefficient position indication information is further used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the plurality of TRP groups, wherein the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, The coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

24. The method according to claim 3, characterized in that The coefficients include the strongest reference amplitude; The coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to the multiple TRPs; Among them, the number of strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

25. The method according to claim 24, characterized in that The coefficient position indication information is provided by Indicate, or, indicate through a bitmap of N bits; Where N represents the number of TRPs.

26. The method according to claim 3, characterized in that The coefficients include the strongest reference amplitude; The coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to the multiple TRP groups; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

27. The method according to claim 26, characterized in that The coefficient position indication information is provided by Indicate, or, indicate through a bitmap of G bits; Where G represents the number of TRP groups.

28. The method according to claim 3, characterized in that The coefficients include the strongest amplitude, and the number of the strongest amplitude is one; The coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the multiple TRPs, and the position representation includes the second TRP with the strongest amplitude; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

29. The method according to claim 28, characterized in that The coefficient position indication information is provided by instruct; Where N represents the number of TRPs.

30. The method according to claim 3, characterized in that The coefficients include the strongest amplitude, and the number of the strongest amplitude is one; The coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the plurality of TRP groups, wherein the position represents the second TRP group including the strongest amplitude; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

31. The method according to claim 30, characterized in that The coefficient position indication information is provided by instruct; Where G represents the number of TRP groups.

32. A coefficient indication method, characterized in that: Executed by a network device, the method includes: Sending codebook parameter information to the terminal device; the codebook parameter information is used to determine the dimension of the combination coefficient matrix corresponding to multiple TRPs or multiple TRP groups; Receiving coefficient position indication information sent by the terminal device; The coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix; The coefficient includes a strongest combination coefficient. When the number of the strongest combination coefficient is one and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in a combination coefficient matrix corresponding to a plurality of TRPs, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

33. The method according to claim 32, characterized in that The codebook parameter information includes: the number of TRPs / TRP groups, the number of basis vectors corresponding to one TRP / TRP group or multiple TRPs / TRP groups; The number of basis vectors includes at least one of the following: The number of SD basis vectors; The number of FD basis vectors; Number of ports; The number of vector pairs of SD basis vectors and FD basis vectors.

34. The method according to claim 32, characterized in that The coefficient also includes at least one of the following: the strongest reference amplitude, the strongest amplitude.

35. The method according to claim 32, characterized in that The coefficient position indication information includes first indication information for indicating a first TRP corresponding to the strongest combination coefficient, and second indication information for indicating a position of the strongest combination coefficient in a combination coefficient matrix corresponding to the first TRP; or, The coefficient position indication information includes second indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP, and the first TRP is predefined or configured by the network device.

36. The method according to claim 35, characterized in that The first indication information is provided by instruct; The second indication information is provided by instruct; Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n Represents the number of FD basis vectors of the nth TRP; the nth TRP is the first TRP.

37. The method according to claim 35, characterized in that The first indication information is provided by instruct; The second indication information is indicated by any one of the following: Where N represents the number of TRPs; L n Indicates the number of SD basis vectors or ports of the nth TRP; Represents the number of non-zero coefficients in a combination coefficient matrix of a transmission layer corresponding to the nth TRP; the nth TRP is the first TRP.

38. The method according to claim 32, characterized in that When there are multiple strongest combination coefficients and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP, the multiple strongest combination coefficients correspond one-to-one to the multiple TRPs.

39. The method according to claim 38, characterized in that The coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP; The indication information for indicating the position of the strongest combination coefficient corresponding to the nth TRP is indicated by any one of the following: Among them, L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; K represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; n,0 Represents the maximum number of non-zero coefficients per transport layer of the nth TRP.

40. The method according to claim 38, characterized in that The method further comprises: Receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRPs; the other TRPs are TRPs other than the third TRP in the multiple TRPs; The third TRP is indicated by the coefficient position indication information; or, the third TRP is predefined or configured by a network device; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

41. The method according to claim 38, characterized in that The method further comprises: Receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP; the fourth TRP is one of the other TRPs in the plurality of TRPs except the third TRP; The third TRP is indicated by the coefficient position indication information, or the third TRP is predefined or configured by a network device; The position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs is indicated by the coefficient position indication information; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP.

42. The method according to claim 40 or 41, characterized in that In the coefficient position indication information, bits indicates the third TRP; Where N represents the number of TRPs.

43. The method according to claim 41, characterized in that In the coefficient position indication information, or Indicates the position of the strongest combination coefficient corresponding to the fourth TRP in the combination coefficient matrix corresponding to the plurality of TRPs; Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n represents the number of FD basis vectors of the nth TRP; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the nth TRP; the jth TRP is the third TRP.

44. The method according to claim 38, characterized in that The coefficients also include the strongest amplitude and / or the strongest reference amplitude; The coefficient position indication information is further used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the plurality of TRPs, wherein the position of the strongest amplitude represents the TRP including the strongest amplitude; and / or, The coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRPs, and the position of the strongest reference amplitude represents the TRP including the strongest reference amplitude.

45. The method according to claim 32, characterized in that In the case where the number of the strongest combination coefficient is one, and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRP groups, the coefficient position indication information includes third indication information for indicating the first TRP group corresponding to the strongest combination coefficient, and fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group; or, The coefficient position indication information includes fourth indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to the first TRP group, and the first TRP group is predefined or configured by the network device.

46. ​​The method according to claim 45, characterized in that The third indication information is provided by instruct; The fourth indication information is provided by instruct; Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g,i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; M g,i Represents the number of FD basis vectors of the i-th TRP in the g-th TRP group.

47. The method according to claim 45, characterized in that The third indication information is provided by instruct; The fourth indication information is indicated by any one of the following: Where G represents the number of TRP groups; I g represents the number of TRPs in the g-th TRP group; L g,i represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; Represents the number of non-zero coefficients in the combination coefficient matrix of a transmission layer corresponding to the i-th TRP in the g-th TRP group.

48. The method according to claim 32, characterized in that When there are multiple strongest combination coefficients and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group, the multiple strongest combination coefficients correspond one-to-one to the multiple TRP groups.

49. The method according to claim 48, characterized in that The coefficient position indication information includes indication information for indicating the position of the strongest combination coefficient in the combination coefficient matrix corresponding to each TRP group; Among them, the indication information for indicating the position of the strongest combination coefficient corresponding to the g-th TRP group is obtained by instruct; Among them, I g represents the number of TRPs in the g-th TRP group; L g,i K represents the number of SD basis vectors or ports of the i-th TRP in the g-th TRP group; g,0 Represents the maximum number of non-zero coefficients for each transport layer of the g-th TRP group.

50. The method according to claim 48, characterized in that The method further comprises: Receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to other TRP groups; the other TRP groups are TRP groups other than the third TRP group among the multiple TRP groups; The third TRP group is indicated by the coefficient position indication information; or, the third TRP group is predefined or configured by a network device; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

51. The method according to claim 48, characterized in that The method further comprises: Receiving coefficient indication information sent by the terminal device; wherein the coefficient indication information is used to indicate the reference amplitude and differential phase of the strongest combination coefficient in the combination coefficient matrix corresponding to the fourth TRP group; the fourth TRP group is one of the other TRP groups in the plurality of TRP groups except the third TRP group; The third TRP group is indicated by the coefficient position indication information, or the third TRP group is predefined or configured by a network device; The position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups is indicated by the coefficient position indication information; Among them, the coefficient indication information is not used to indicate the strongest combination coefficient in the combination coefficient matrix corresponding to the third TRP group.

52. The method according to claim 50 or 51, characterized in that In the coefficient position indication information, indicating the third TRP group; Where G represents the number of TRP groups.

53. The method according to claim 51, characterized in that In the coefficient position indication information, Indicates the position of the strongest combination coefficient corresponding to the fourth TRP group in the combination coefficient matrix corresponding to the plurality of TRP groups; Where G represents the number of TRP groups; L g,i Represents the number of SD basis vectors or the number of ports of the i-th TRP group; the j-th TRP group is the third TRP group.

54. The method according to claim 48, characterized in that The coefficients also include the strongest amplitude and / or the strongest reference amplitude; The coefficient position indication information is further used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the plurality of TRP groups, wherein the position of the strongest amplitude represents the TRP group including the strongest amplitude; and / or, The coefficient position indication information is also used to indicate the position of the strongest reference amplitude in the combined coefficient matrix corresponding to the multiple TRP groups, and the position of the strongest reference amplitude represents the TRP group including the strongest reference amplitude.

55. The method of claim 34, wherein: The coefficients include the strongest reference amplitude; The coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to the multiple TRPs; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

56. The method according to claim 55, characterized in that The coefficient position indication information is provided by Indicate, or, indicate through a bitmap of N bits; Where N represents the number of TRPs.

57. The method of claim 34, wherein: The coefficients include the strongest reference amplitude; The coefficient position indication information is used to indicate the position of the strongest reference amplitude in the combination coefficient matrix corresponding to the multiple TRP groups; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

58. The method according to claim 57, characterized in that The coefficient position indication information is provided by Indicate, or, indicate through a bitmap of G bits; Where G represents the number of TRP groups.

59. The method according to claim 34, characterized in that The coefficients include the strongest amplitude, and the number of the strongest amplitude is one; The coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the multiple TRPs, and the position representation includes the second TRP with the strongest amplitude; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRPs is multiple.

60. The method according to claim 59, characterized in that The coefficient position indication information is provided by instruct; Where N represents the number of TRPs.

61. The method according to claim 34, characterized in that The coefficients include the strongest amplitude, and the number of the strongest amplitude is one; The coefficient position indication information is used to indicate the position of the strongest amplitude in the combination coefficient matrix corresponding to the plurality of TRP groups, wherein the position represents the second TRP group including the strongest amplitude; Among them, the number of the strongest combination coefficients in the combination coefficient matrix corresponding to multiple TRP groups is multiple.

62. The method according to claim 61, characterized in that The coefficient position indication information is provided by instruct; Where G represents the number of TRP groups.

63. A communication device, characterized in that: Set in a terminal device, the device includes: A transceiver unit, configured to receive codebook parameter information sent by a network device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to a plurality of TRPs or a plurality of TRP groups; The transceiver unit is further used to send coefficient position indication information to the network device; The coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix; The coefficient includes the strongest combination coefficient; when the number of the strongest combination coefficient is one and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in the combination coefficient matrix corresponding to multiple TRPs, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

64. A communication device, characterized in that: Set in a network device, the device includes: A transceiver unit, configured to send codebook parameter information to a terminal device; the codebook parameter information is used to determine the dimension of a combination coefficient matrix corresponding to a plurality of TRPs or a plurality of TRP groups; The transceiver unit is further used to receive coefficient position indication information sent by the terminal device; The coefficient position indication information is used to indicate the position of a specific coefficient in the combination coefficient matrix; The coefficient includes a strongest combination coefficient. When the number of the strongest combination coefficient is one and the coefficient position indication information is used to indicate the position of the strongest combination coefficient in a combination coefficient matrix corresponding to a plurality of TRPs, the coefficient position indication information is indicated by at least one of the following: Where N represents the number of TRPs; L n represents the number of SD basis vectors or ports of the nth TRP; M n K represents the number of FD basis vectors of the nth TRP; tot Represents the total number of non-zero coefficients in the combined coefficient matrix of a transmission layer corresponding to the multiple TRPs.

65. A communication device, characterized in that: The device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method according to any one of claims 1 to 31.

66. A communication device, characterized in that: The device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method according to any one of claims 32 to 62.

67. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to execute the code instructions to perform the method according to any one of claims 1 to 31.

68. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to execute the code instructions to perform the method according to any one of claims 32 to 62.

69. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 31 to be implemented.

70. A computer-readable storage medium storing instructions, which, when executed, enable the method of any one of claims 32 to 62 to be implemented.

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