PMI Parameter Feedback Method for Joint Transmission, Terminal, and Network-Side Device

Abstract

This application discloses a PMI parameter feedback method for joint transmission, a terminal, and a network-side device, belonging to the field of wireless communication. The PMI parameter feedback method for joint transmission in the embodiments of this application is that the terminal performs channel measurement based on M target resources constituted by the network-side device, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1, and the terminal obtains a first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource among the M target resources, where i = 1, 2,..., N, and N is an integer less than or equal to M, and the first PMI parameter includes at least one of the number of basis vectors M v,i and the change range of the basis vectors, and the quantization bits of the coefficient amplitude, and the quantization table of the coefficient amplitude, and the quantization bits of the coefficient phase, and the quantization table of the coefficient phase, and the terminal transmits the first PMI parameter of the i-th target resource.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 16, 2022, with the application number 202210681219.7 and the invention title "PMI Parameter Feedback Method for Joint Transmission, Terminal and Network - side Device", and all the contents of this application are incorporated into this application by reference.

[0002] This application belongs to the field of wireless communication technology, and specifically relates to a PMI parameter feedback method for joint transmission, a terminal, and a network - side device.

Background Art

[0003] Coordinated Multiple Points (CoMP) transmission means that multiple geographically separated Transmission Reception Points (TRPs) cooperate to participate in data transmission for one terminal or to jointly receive data transmitted by one terminal. The multiple transmission points participating in the cooperation generally refer to the base stations of different cells. By using interference signals as useful signals through the cooperation of multiple cell base stations, inter - cell interference can be reduced and the spectrum utilization rate of the system can be improved.

[0004] All general CoMP solutions can be classified into one of the types of Joint Processing (JP) or Collaborative Scheduling (CS) / Coordinated Beamforming (CB).

[0005] Here, joint processing (JP) means that the data of one terminal (User Equipment, UE) is available on one or more time-frequency resource points in a CoMP cooperation set, and includes the following.

[0006] (1) It is joint transmission (JT). For example, data is simultaneously transmitted from multiple points (part of the CoMP cooperation set or the entire CoMP cooperation set) to one UE or multiple UEs in one time-frequency resource. Or, data is simultaneously transmitted from multiple points to a UE to improve, for example, the received signal quality and / or the amount of data throughput (coherently or non-coherently).

[0007] (2) It is dynamic point selection (DPS) / frequency modulation. Data transmission is performed from one point (within the CoMP cooperation set) in one time-frequency resource. The transmission / mixing point can change from one subframe to another, including changes on RB pairs within one subframe. The data is available simultaneously on multiple points. Dynamic point selection / frequency modulation may include dynamic cell selection (DCS).

[0008] (3) It is a combination of DPS and JT. In such a case, multiple points can be selected from the time-frequency resource for data transmission. Cooperative scheduling / beamforming (CS / CB) means that for one time-frequency resource, the data of the UE is available only on one point of the CoMP cooperation set and is transmitted from this point (DL data transmission starts from this point), but the determination of user scheduling / beamforming is performed cooperatively among the points corresponding to the CoMP cooperation set. The selection of the transmission point is semi-static, that is, semi-static point selection (SSPS), that is, each time data is transmitted from one point to one specific UE, the transmission point can only be changed in a semi-static manner.

[0009] In the related art, considering the overhead problem of Precoding matrix indicator (PMI) feedback, the codebook design adds frequency-domain compression, expands the maximum supported Rank number to 4, and adds the distribution of non-zero coefficients indicating PMI feedback in the Bitmap method. Here, the generation of each layer's codebook may be represented by the following formula:

Number

Number

Number

Number

Number

Number

Number

Number

Number

Number

Number

Number

Number

[0010] However, since the current codebook parameter definition and parameter values are mainly made for the PMI in which one channel measurement resource (associated with one TRP) is configured by the network-side device, the PMI parameter feedback method in the related art is not applicable to the scenario in which a plurality of channel measurement resources (associated with a plurality of TRPs) are configured by the network-side device.

Summary of the Invention

Problems to be Solved by the Invention

[0011] Embodiments of the present application provide a PMI parameter feedback method for joint transmission, a terminal, and a network-side device that can solve the problem that the PMI parameter feedback method in the related art is not applicable to the scenario in which a plurality of channel measurement resources are configured by the network-side device.

Means for Solving the Problems

[0012] The first aspect provides a PMI parameter feedback method for joint transmission. This method includes: a terminal performing channel measurement based on M target resources configured by network-side devices, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1; the terminal obtaining a first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource among the M target resources, where i = 1, 2,..., N, N is an integer less than or equal to M, and the first PMI parameter includes at least one of the number of basis vectors M v,i and the change range of the basis vectors, the quantization bits of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bits of the coefficient phase, and the quantization table of the coefficient phase; and the terminal transmitting the first PMI parameter of the i-th target resource.

[0013] The second aspect provides a PMI parameter feedback apparatus for joint transmission. This apparatus includes: a measurement module for performing channel measurement based on M target resources configured by network-side devices, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1; a first acquisition module for obtaining a first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource among the plurality of target resources, where i = 1, 2,..., N, N is an integer less than or equal to M, and the first PMI parameter includes at least one of the number of basis vectors M v,i and the change range of the basis vectors, the quantization bits of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bits of the coefficient phase, and the quantization table of the coefficient phase; and a transmission module for transmitting the first PMI parameter of the i-th target resource.

[0014] The third aspect provides a method for obtaining PMI for joint transmission used in a network-side device. This method involves the network-side device obtaining the first PMI parameter of the i-th target resource transmitted by a terminal, where i = 1, 2,..., N, N is an integer less than or equal to M, and M is the number of target resources configured by the network-side device for the terminal. The first PMI parameter includes the number of basis vectors M v,i and at least one of the change range of the basis vectors, the quantization bits of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bits of the coefficient phase, and the quantization table of the coefficient phase. The network-side device obtains the PMI for joint transmission based on the first PMI parameter.

[0015] The fourth aspect provides a PMI acquisition device for joint transmission. This device includes a second acquisition module for obtaining the first PMI parameter of the i-th target resource transmitted by a terminal, where i = 1, 2,..., N, N is an integer less than or equal to M, and M is the number of target resources configured by the network-side device for the terminal. The first PMI parameter includes the number of basis vectors M v,i and at least one of the change range of the basis vectors, the quantization bits of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bits of the coefficient phase, and the quantization table of the coefficient phase. The device also includes a third acquisition module for obtaining the PMI for joint transmission based on the first PMI parameter.

[0016] The fifth aspect provides a terminal that includes a processor and a memory. The memory stores a program or instructions that can run on the processor. When the program or instructions are executed by the processor, the steps of the method described in the first aspect are realized.

[0017] The sixth aspect provides a terminal, which includes a processor and a communication interface. Here, the processor is used to implement the steps of the method described in the first aspect, and the communication interface is used to communicate with external devices.

[0018] The seventh aspect provides a network-side device, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the third aspect are realized.

[0019] The eighth aspect provides a network-side device, which includes a processor and a communication interface. Here, the processor is used to implement the steps of the method described in the third aspect, and the communication interface is used to communicate with external devices.

[0020] The ninth aspect provides a PMI acquisition system for joint transmission, which includes a terminal and a network-side device. The terminal may be used to execute the steps of the method described in the first aspect, and the network-side device may be used to execute the steps of the method described in the third aspect.

[0021] The tenth aspect provides a readable storage medium, which stores a program or instruction. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are realized, or the steps of the method described in the third aspect are realized.

[0022] The eleventh aspect provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor runs a program or instruction and is used to realize the steps of the method described in the first aspect, or the steps of the method described in the third aspect.

[0023] The twelfth aspect provides a computer program / program product, which is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the steps of the method described in the first aspect or the steps of the method described in the third aspect.

Advantages of the Invention

[0024] In the embodiments of the present application, the terminal performs channel measurement based on M target resources constituted by network - side devices, and based on the channel measurement results of the M target resources, obtains the first PMI parameter of each target resource among the N target resources. This first PMI parameter includes at least one of, but is not limited to, the number M of basis vectors, the change range of the basis vectors, the quantization bit number of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bit number of the coefficient phase, and the quantization table of the coefficient phase. By feeding back the first PMI parameter of the obtained target resource, in a scenario where a plurality of target resources are constituted by network - side devices, the PMI parameter can be fed back based on the channel measurement information of each target resource. v,i And by feeding back the first PMI parameter of the obtained target resource, in a scenario where a plurality of target resources are constituted by network - side devices, the PMI parameter can be fed back based on the channel measurement information of each target resource.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0026] The following clearly describes the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art fall within the protection scope of the present application.

[0027] Terms such as "second" in the specification and claims of the present application are used to distinguish similar objects and are not for describing a specific order or sequence. It should be understood that such terms are interchangeable when appropriate, so that the embodiments of the present application can be implemented according to an order other than that illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, without limiting the number of objects. For example, the first object may be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the related objects before and after are in an "or" relationship.

[0028] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be applied to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of this application are always used interchangeably, and the described technology may be used in the systems and radio technologies mentioned above, or in other systems and radio technologies. The following description describes the New Radio (NR) system for illustrative purposes and uses NR terms in most of the following descriptions. However, these technologies may also be applied to applications other than NR system applications, such as the Sixth Generation (6 th Generation, 6G) communication system.

[0029] FIG. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Here, the terminal 11 may be a mobile phone, a tablet personal computer, a laptop computer (or called a notebook computer), a personal digital assistant (PDA), a palm-top computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle user equipment (VUE), a pedestrian user equipment (PUE), a smart home (home devices having a wireless communication function, such as a refrigerator, a television, a washing machine, or furniture), a game console, a personal computer (PC), a deposit and payment machine, or a self-service machine. The wearable device may include a smart watch, a smart trist band, smart earphones, smart glasses, a smart accessory (such as a smart bracelet, a smart hand chain, a smart ring, a smart necklace, a smart ankle bracelet, a smart anklet), a smart band, smart clothing, etc. It should be noted that the terminal 11 in the embodiment of the present application is not limited to a specific type. The network-side device 12 may include an access network device and / or a core network device. Here, the access network device 12 may be called a wireless access network device, a radio access network (RAN), a wireless access network function, or a wireless access network unit.The access network device 12 may include a base station, a Wireless Local Area Network (WLAN) access point, or a Wireless Fidelity (WiFi) node, etc. The base station may be called a Node B, an Evolved Node B (eNB), an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home B Node, a Home Evolved B Node, a Transmission Reception Point (TRP), or other appropriate terms in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. For the sake of explanation, in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0030] In the related art, the R16 TypeII codebook designs the codebook by using the beam combination principle. Considering the overhead problem of PMI feedback, the design of the R16 TypeII codebook adds frequency domain compression, expands the maximum supported Rank number to 4, and adds the distribution status of non-zero coefficients indicating PMI feedback in the Bitmap method.

[0031] Here, the generation of the codebook for each layer may be represented by the following formula.

Number

Number

Number

Number

Number

Number

Number

Number

Number

Number

[0032] The terminal, in PMI,

Number

Number

Number

Number

[0033] Currently, the parameters of the PMI coefficient fed back by the terminal include i1 and i2, where i1 includes i 1,1 , i 1,2 , i 1,5 , i 1,6,1 , i 1,7,l , i 1,8,l and i2 includes i 2,3,l , i 2,4,l , i 2,5,l Here, l indicates the corresponding transmission layer, for example, one or more values among l = 1, 2, 3, 4. For example, when the RI value is 2, l = 1, 2, and when the RI value is 4, l = 1, 2, 3, 4.

[0034] Here, i 1,1 is used to indicate the orthogonal DFT vector group number and is equal to [q1, q2], where q1 ∈ {0, 1, O1 - 1}, q2 ∈ {0, 1, O2 - 1}, and O1, O2 are the oversampling coefficients configured by the network. i 1,2 is used to indicate the L vector numbers within the orthogonal DFT vector group indicated by i 1,1 . [Number] is equal to, where N1, N2 are the port number parameters configured by the network, and L is the number of DFT vectors indicated by the network. [Number] represents the number of combinations of L beams selected from N1N2 beams.

[0035] i 1,5 indicates the start position M of a window of length 2Mv, and the value range is such that i initial ∈{0, 1,... 2Mv - 1}, where Mv represents the number of time-domain taps. Note that it only exists when N3 > 19. When N3 ≤ 19, i 1,5 = 0, and the terminal does not need to feedback this coefficient. 1,5

[0036] i 1,6,l is used to indicate the position among N3 - 1 tap coefficients of Mv - 1 tap coefficients feedback by layer l. The value range is divided into two situations. When N3 > 19, the value range is

Number

Number

[0037] i 1,7,l is the layer l non-zero coefficient indication, a bit sequence with a length of 2LM l

[0038] i 1,8,l is the layer l strongest coefficient indication, and the value range is such that i 1,8 ∈{0, 1,... 2L - 1}, where for rank = 1 transmission, i 1,8,l is 1,8,l the i-th non-zero coefficient, and for transmissions with rank > 1, i 1,8,l is 1,8,l the i-th coefficient.

[0039] i 2、3,lis the amplitude coefficient quantization indication for two polarization waves of layer l. Each amplitude coefficient is a 4-bit bit string, and each code point corresponds to one quantization value. Here, the amplitude coefficient of the polarization wave with the strongest coefficient is not feedback and is assumed to be 1.

[0040] i 2、4,l is the amplitude coefficient quantization indication for all tap coefficients of layer l. Each amplitude coefficient is a 3-bit bit string, and each code point corresponds to one quantization value. A total of 2LMv amplitude coefficients are obtained. Here, the amplitude coefficient of the strongest coefficient is not feedback and is assumed to be 1, and for the remaining coefficients, only the amplitude non-zero coefficients are feedback. Therefore, the total number of feedback coefficients for layer l is K NZ,l -1, where K NZ,l represents the number of amplitude non-zero coefficients of layer l.

[0041] i 2、5,l is the phase coefficient quantization indication for all tap coefficients of layer l. Each coefficient is a 4-bit bit string, and each code point corresponds to one quantization value. A total of 2LMv phase coefficients are obtained. Here, the phase coefficient of the strongest coefficient is not feedback and is assumed to be 0, and for the remaining coefficients, only the phase coefficients corresponding to the amplitude non-zero coefficients are feedback. Therefore, the total number of feedback coefficients for layer l is K NZ,l -1, where K NZ,l represents the number of amplitude non-zero coefficients.

[0042] The PMI parameter can be reported by the Channel State Information (CSI). Generally, a CSI reporting mechanism based on the Physical Uplink Shared Channel (PUSCH) is adopted. The CSI supports Type 1 broadband or sub-band CSI based on PUSCH reporting and also supports Type 2 CSI.

[0043] For Type1, Type2, and Extended Type2 CSI, based on PUSCH feedback, one CSI report consists of two parts, namely the first part (Part1) and the second part (Part2). Here, Part1 has a fixed payload size and indicates the number of information bits in Part2. Note that Part1 must be transmitted in its entirety before Part2.

[0044] For Type1 CSI feedback, Part1 includes one or more of the Rank indicator (RI), CSI Reference Signal (CSI-RS) Resource Indicator (CRI), and Channel quality indicator (CQI) of the first codeword. Part2 includes one or more of the PMI and CQI of the second codeword.

[0045] For Type2 CSI feedback, Part1 includes one or more of the RI, CQI, and the per-layer non-zero broadband amplitude coefficient indicator of Type2 CSI. Part2 includes the PMI of Type2 CSI.

[0046] For Extended Type2 CSI feedback, Part1 includes the RI, CQI, and an indication of the total number of extended Type2 CSI cross-layer non-zero amplitude coefficients. Type2 includes the PMI of the extended Type2 CSI.

[0047] For the above extended Type2 CSI feedback, the number of delays / beams fed back in the PMI parameter is configured by the network. In the scenario of multi-TRP joint transmission, when obtaining Type2 CSI, the feedback overhead by the terminal significantly increases. If the number of delays / beams configured by the network side is too large, the feedback overhead may further increase. On the other hand, if the number of delays / beams configured by the network side is too small, it will affect the accuracy of the PMI fed back by the UE.

[0048] In the following, in conjunction with the drawings, the PMI parameter feedback scheme for joint transmission according to the embodiments of the present application will be described in detail by several embodiments and their application scenarios.

[0049] FIG. 2 shows a flowchart of a method for PMI parameter feedback for joint transmission in an embodiment of the present application. This method 200 may be executed by a terminal. In other words, the method may be executed by software or hardware installed in the terminal. As shown in FIG. 2, this method may include the following steps.

[0050] S210, the terminal performs channel measurement based on M target resources configured by the network-side device, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1.

[0051] In the joint transmission scenario, the network-side device may configure multiple target resources for the terminal, and each target resource may be associated with one TRP or one TRP group. The terminal can obtain the channel information of the TRP or TRP group associated with this target resource by measuring the target resource. For example, the network-side device may configure or associate the target resources to be measured for the UE according to the multi-TRP (MTRP) CSI report configuration.

[0052] In the embodiments of the present application, the target resource may include a measurement resource or a measurement resource group. Here, one measurement resource may be one CSI-RS resource, or multiple CSI-RS ports of one CSI-RS resource, or a set of CSI-RS ports. However, one measurement resource group may include at least one measurement resource.

[0053] S212. The terminal obtains the first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource among the M target resources, where i = 1, 2,..., N, and N is an integer less than or equal to M.

[0054] Here, the i-th target resource is the i-th target resource among the N target resources.

[0055] In the embodiments of the present application, selecting N target resources from M target resources may be specifically implemented based on the terminal. For example, the terminal may select at least one target resource to be fed back based on the channel measurement results for the M target resources. Here, the number N of target resources selected when fed back may be the same as the number M of target resources configured by the network-side device, or may be different. For example, when the terminal determines that N of the M target resources satisfy the preset conditions based on the channel measurement results of the M target resources, the terminal may select to feed back the PMI parameters of these N target resources. The value range of N is 1 to M.

[0056] In the embodiments of the present application, when N = M, in one case, it is that the terminal selects to feed back the PMI parameters of all target resources. In another case, although the terminal selects some of the M target resources, when feeding back, it feeds back the PMI parameters of all target resources. For the part of the target resources that are not selected, the value of the PMI parameter to be fed back may be a predetermined value, for example, 0.

[0057] In the embodiments of the present application, the terminal obtains the first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource. Here, the first PMI parameter includes, but is not limited to, at least one of the following.

[0058] (1) The number of basis vectors M v,iThat is, according to this possible implementation method, the terminal does not determine the basis vectors based on the configuration of the network-side device, but can determine the number of basis vectors of the i-th target resource based on the actual channel measurement results of the measurement on the i-th target resource, thereby avoiding the problem that the overhead of feedback further increases or the accuracy of the PMI coefficient to be fed back is not high due to the number of basis vectors configured by the network-side device being too large or too small.

[0059] Here, the number of basis vectors M v,i includes, but is not limited to, one of the following.

[0060] a) The number of basis vectors in the spatial domain (which may also be called the angular domain), for example, the number of pieces of indication information of the spatial-domain beam included in the PMI parameter fed back by the terminal.

[0061] b) The number of basis vectors in the frequency domain (which may also be called the delay domain), for example, the number of pieces of delay indication information in the delay domain included in the PMI parameter fed back by the terminal.

[0062] c) The number of basis vectors in the time domain (which may also be called the Doppler domain), for example, the number of pieces of Doppler indication information in the time domain included in the PMI parameter fed back by the terminal.

[0063] For example, instead of determining the number of beams to be fed back based on the number of beams configured by the network-side device, the terminal can determine the number of spatial-domain basis vectors to be fed back based on the number of beams obtained when measuring the i-th target resource, thereby avoiding the problem that the overhead of feeding back the PMI parameter is too large or inaccurate due to the mismatch between the number of beams configured by the network-side device and the actually measured number. For example, if the number of beams configured by the network-side device is 8, the number of beam information obtained by the terminal through actual measurement is 4. If feedback is performed according to 8, unnecessary overhead will increase.

[0064] (2) The change range of the basis vector, and According to this possible implementation method, instead of determining the basis vector change range based on the configuration of the network-side device, the terminal can determine the basis vector change range of the i-th target resource based on the actual channel measurement result of the measurement for the i-th target resource, thereby avoiding the problem that the feedback overhead further increases or the accuracy of the PMI coefficient to be fed back is not high due to the basis vector change range configured by the network-side device being too large or too small.

[0065] (3) The quantization bit number of the coefficient amplitude, and According to this possible implementation method, the terminal can determine the coefficient amplitude of the i-th target resource based on the actual channel measurement result of the measurement for the i-th target resource. Different coefficients can select different quantization bits based on the magnitude or distribution of the coefficient amplitude, and compared with the case of using only one type of quantization bit, the feedback overhead can be further saved.

[0066] (4) The quantization table of the coefficient amplitude, and According to this possible implementation method, the terminal can determine the coefficient amplitude of the i-th target resource based on the actual channel measurement result of the measurement on the i-th target resource. Different coefficients can select different quantization tables based on the magnitude or distribution of the coefficient amplitude, and compared with the case of using only one type of quantization table, the feedback overhead can be further saved.

[0067] (5) is the number of quantization bits of the coefficient phase, According to this possible implementation method, the terminal can determine the coefficient phase of the i-th target resource based on the actual channel measurement result of the measurement on the i-th target resource. Different coefficients can select different quantization bits based on the magnitude or distribution of the coefficient phase, and compared with the case of using only one type of quantization bit, the feedback overhead can be further saved.

[0068] (6) is the quantization table of the coefficient phase, According to this possible implementation method, the terminal can determine the coefficient phase of the i-th target resource based on the actual channel measurement result of the measurement on the i-th target resource. Different coefficients can select different quantization tables based on the magnitude or distribution of the coefficient phase, and compared with the case of using only one type of quantization table, the feedback overhead can be further saved.

[0069] In one possible implementation method, the number of basis vectors M v,i is less than or equal to the maximum number of basis vectors M configured or associated by the network-side device. Here, M max,i is the maximum number of basis vectors configured or associated for the i-th target resource. max,i is the maximum number of basis vectors configured or associated for the i-th target resource.

[0070] In an embodiment of the present application, the network-side device may uniformly configure or associate one maximum base vector number for a plurality of target resources. For example, the network-side device may configure or associate one M that represents the maximum value of the base vector numbers of all measurement resources. max Only configure or associate. According to this possible implementation method, by uniformly configuring or associating one maximum base vector number for the plurality of target resources by the network-side device, the overhead for the network-side device to configure or associate the maximum base vector number for the target resources can be reduced.

[0071] Alternatively, in one possible implementation method, the network-side device may configure or associate an independent maximum base vector number for each target resource. For example, the network-side device may configure or associate an independent maximum base vector number M max,i for each TRP or each measurement resource, or the network-side device may configure or associate an independent maximum base vector number M max,i for each TRP group or each measurement resource group. Here, all TRPs or measurement resources within the TRP group or measurement resource group use the corresponding M max,i According to this possible implementation method, the network-side device can configure or associate different maximum base vector numbers for different measurement resources or measurement resource groups, and thereby can adapt the configured or associated maximum base vector number to a specific measurement resource or measurement resource group.

[0072] S214. The terminal transmits the first PMI parameter of the i-th target resource.

[0073] In an embodiment of the present application, the terminal performs channel measurement based on M target resources constituted by network-side devices, and based on the channel measurement results of the M target resources, obtains the first PMI parameter of each target resource among the N target resources. This first PMI parameter includes at least one of the number M of basis vectors v,i and the change range of the basis vectors and the quantization bits of the coefficient amplitude and the quantization table of the coefficient amplitude and the quantization bits of the coefficient phase and the quantization table of the coefficient phase, but is not limited thereto, and by feeding back the first PMI parameter of the obtained target resource, in a scenario where a plurality of target resources are constituted by network-side devices, the PMI parameter can be fed back based on the channel measurement information of each target resource. Also, in an embodiment of the present application, by determining that the terminal feeds back the corresponding delay or the number of beams, when the static configuration number of the network is too large or when the feedback overhead further increases, or when the static configuration number is too small, the problem that the accuracy of the PMI fed back by the UE is relatively low can be avoided, so that the terminal can feed back the PMI more dynamically and flexibly, and further improve the feedback performance and the accuracy of the PMI.

[0074] In one possible implementation manner, S214 may include the terminal transmitting CSI. The first part of the CSI includes first indication information, and the first indication information is used to indicate the number M of basis vectors of the i-th target resource v,i For example, the number M of basis vectors of the i-th target resource by the terminal v,iMap and transmit the first instruction information to the first part of the channel state information CSI. For example, the terminal uses the bit sequence in CSI part1 to send the number of base vectors M corresponding to the i-th target resource (e.g., the i-th measurement resource or the i-th measurement resource group, or the i-th TRP or the i-th TRP group associated with the i-th measurement resource or the i-th measurement resource group) to the network device. v,i is fed back. According to this possible implementation method, when the terminal feeds back the number of base vectors M of the i-th target resource in CSI part1 v,i , the network device can obtain the number of base vectors included in the PMI parameter fed back by the terminal through CSI part1, further determine the length of CSI part2, and analyze the corresponding base vector information from CSI part2.

[0075] In one possible implementation method, the length of the bit sequence corresponding to the first instruction information of the number of base vectors M v,i is

Number

[0076] In the above possible implementation method, the positional order of the first instruction information of the number of base vectors M of N target resources in the first part of the CSI is the same as the order pre-configured by the network device, or the number of base vectors M of N target resources v,i The first instruction information of is in the same order as the order pre-configured by the network device, or the number of base vectors M of N target resourcesv,i The positional order in the first part of the CSI for the first indication information of [[ID=]] is the same as the configuration order of the plurality of target resources. That is, when the terminal maps the first indication information of the base vector number M of each target resource v,i when mapping the first indication information of [[ID=]], the base vector number M of the plurality of target resources v,i The mapping order in the first part of the CSI for the first indication information of [[ID=]] is the same as the order preconfigured by the network-side device, or the mapping order in the first part of the CSI for the first indication information of the base vector number M of the plurality of target resources v,i is the same as the configuration order of the plurality of target resources.

[0077] For example, for the joint transmission PMI acquisition of N TRPs (i.e., N TRPs associated with N target resources), when the strongest coefficients of each TRP (or each target resource) are all cyclically shifted by a delay of 0, it is only necessary to additionally notify the network-side device of the delay number selected other than delay 0, that is, add an N-bit sequence to CSI part1. Here, the length of the bit sequence corresponding to the i-th TRP is

Number

[0078] Also, for example, for the joint transmission PMI acquisition of N TRPs, when the position of the delay corresponding to the strongest coefficient of each TRP is obtained by CSI part2, it is only necessary to additionally convey to the network-side device the delay number selected other than the delay corresponding to the strongest coefficient, that is, add an N-bit sequence to CSI part1. Here, the length of the bit sequence corresponding to the i-th TRP is

Number

[0079] For another example, for the joint transmission PMI acquisition of N TRPs, if the strongest coefficients of each TRP are all cyclically shifted to delay 0, and it is only necessary to additionally inform the network of the number of delays selected other than delay 0, for the i-th target resource (associated with the i-th TRP), if M max,i = 4 is configured in the CSI part1, the length of the CSI part1 is

Number

[0080] In one possible implementation, the first part of the CSI further includes second indication information, and the second indication information is used to indicate the N target resources. That is, the first part of the CSI may include the first indication information of the number of basis vectors of the N target resources selected by the terminal (i.e., the target resources recommended by the terminal), and the first part of the CSI may further include the second indication information for indicating the N target resources. Here, the first indication information and the second indication information are located in different regions of the first part of the CSI. v,i In the above possible implementation, S214 may include the following steps.

[0081] In the above possible implementation, S214 may include the following steps.

[0082] Step 1, the terminal maps the first indication information of the number of basis vectors of the target resources recommended by the terminal to the first part of the CSI. Step 2, the terminal maps the second indication information of the target resources recommended by the terminal to the first region of the first part of the CSI, where the first region is a region other than the region where the first indication information is mapped. Step 3: The terminal transmits the first part of the CSI.

[0083] According to the above possible implementation manner, the terminal can map the first indication information of the number of base vectors of the target resource it recommends to CSI part1, and map the second indication information used for the target resource recommended by the terminal to other areas of CSI part1. For example, the terminal can select the recommended target resource based on the channel measurement result, so that the network-side device can know the target resource recommended by the terminal based on the PMI parameter fed back by the terminal, thereby selecting the TRP associated with the target resource recommended by the terminal to perform joint transmission, and further improving the efficiency of joint transmission.

[0084] For example, the terminal indicates the measurement resource or measurement resource group information recommended by the terminal through other areas or newly added areas in CSI Part1. At this time, the indication sequence of the number M of base vectors in CSI part1 v,i may only include the indication of the number of base vectors of the measurement resource or measurement resource group recommended by the terminal without feeding back the indication of the number of base vectors of other measurement resources or measurement resource groups.

[0085] In this possible implementation manner, the number N of the first indication information mapped to the first part of the CSI is less than or equal to the number M of a plurality of target resources configured by the network-side device. That is, the number of the first indication information of the number of base vectors fed back by the terminal in CSI part1 may be smaller than the number of target resources (for example, measurement resources or measurement resource groups) configured by the network-side device.

[0086] In the above possible implementation manners, in order to ensure that the length of the first part of the CSI remains unchanged, before the terminal transmits the first part of the CSI, the method further includes that the terminal performs a zero-padding operation on the first part of the CSI by using a zero sequence, where the length of the first part of the CSI after the zero-padding operation is a predetermined value.

[0087] For example, by a network, four measurement resource channels, i.e., Channel Measurement Resource (CMR) 0, CMR1, CMR2, and CMR3 (associated with four TRPs), are configured to obtain joint transmission PMI, and the network-side device is configured to enable the terminal to select an appropriate CMR and feedback the corresponding PMI. The network-side device is instructed that the maximum delay number associated with each CMR is 4. The terminal selects CMR0, CMR1, and CMR2 (corresponding to three TRPs) based on the measurement resources to obtain the corresponding PMI parameters. Here, when the delay number associated with CMR0 is 2, the delay number associated with CMR1 is 3, and the delay number associated with CMR2 is 4, the CSI part1 fed back by the terminal includes a TRP indication field 1110 for instructing the network of the selected CMR (at this time, the order of the indication fields is the same as the CMR configuration order). The CSI part1 further includes the number of delays selected by the terminal based on these three CMRs according to the order of the selected CMRs. The length of each bit sequence for indicating the number is

Number

[0088] In another possible implementation, the number M of the base vectors v,i The length of the bit sequence corresponding to the indication information of is

Number

[0089] In the above possible implementation, the order of the positions of the number M of the base vectors of the N target resources in the first part of the CSI of the first indication information is the same as the order preconfigured by the network-side device, or the number M of the base vectors of the N target resources v,i The order of the positions of the first indication information of in the first part of the CSI is the same as the order of the configurations of the plurality of target resources. That is, the order of the positions of the number M of the base vectors of the plurality of target resources v,i The mapping order of the first indication information of in the first part of the CSI is the same as the order preconfigured by the network-side device, or the number M of the base vectors of the plurality of target resources v,i The mapping order of the first indication information of in the first part of the CSI is the same as the order of the configurations of the plurality of target resources. v,i For example, for the joint transmission PMI acquisition of N target resources (measurement resources or measurement resource groups), at this time, N bit sequences are added to the CSI part1, where the length of the bit sequence corresponding to the i-th TRP is

[0090]

Number

Number

[0091] In the above possible implementation manner, in S214, before the terminal transmits CSI, when the terminal does not recommend the i-th target resource, the terminal uses the number M of base vectors of the i-th target resource v,i to map and set the bit sequence corresponding to the first indication information to an all-zero sequence. That is, when the terminal maps the first indication information of the number M of base vectors of the i-th target resource to the first part of CSI, when the terminal does not recommend the i-th target resource, the terminal maps the bit sequence corresponding to the first indication information of the number M of base vectors of the i-th target resource as an all-zero sequence. In this possible implementation manner, for a target resource that is not recommended, the terminal maps the bit sequence corresponding to the first indication information of the number M of base vectors of this target resource in the first part of CSI as an all-zero sequence, and indicates to the network-side device that the terminal does not recommend this target resource, so that the network-side device can avoid selecting the TRP corresponding to this target resource for joint transmission. v,i In the above possible implementation manner, in S214, before the terminal transmits CSI, when the terminal does not recommend the i-th target resource, the terminal uses the number M of base vectors of the i-th target resource v,i to map and set the bit sequence corresponding to the first indication information to an all-zero sequence. That is, when the terminal maps the first indication information of the number M of base vectors of the i-th target resource to the first part of CSI, when the terminal does not recommend the i-th target resource, the terminal maps the bit sequence corresponding to the first indication information of the number M of base vectors of the i-th target resource as an all-zero sequence. In this possible implementation manner, for a target resource that is not recommended, the terminal maps the bit sequence corresponding to the first indication information of the number M of base vectors of this target resource in the first part of CSI as an all-zero sequence, and indicates to the network-side device that the terminal does not recommend this target resource, so that the network-side device can avoid selecting the TRP corresponding to this target resource for joint transmission. v,i In this possible implementation manner, for a target resource that is not recommended, the terminal maps the bit sequence corresponding to the first indication information of the number M of base vectors of this target resource in the first part of CSI as an all-zero sequence, and indicates to the network-side device that the terminal does not recommend this target resource, so that the network-side device can avoid selecting the TRP corresponding to this target resource for joint transmission.

[0092] In the above possible implementation manner, the number N of the first indication information of the number of base vectors fed back by the terminal in CSI part1 may be equal to the number M of measurement resources or measurement resource groups configured by the network-side device.

[0093] For example, four measurement resources CMR0, CMR1, CMR2, and CMR3 (associated with four TRPs) are configured by the network-side device to obtain joint transmission PMI, and the network is configured such that the terminal can select an appropriate CMR and feedback the corresponding PMI, and the network is instructed that the maximum number of delays associated with each CMR is 4. The terminal selects CMR0, CMR1, and CMR2 (corresponding to three TRPs) based on the measurement resources to obtain the corresponding PMI parameters. Here, when the number of delays associated with CMR0 is 2, the number of delays associated with CMR1 is 3, and the number of delays associated with CMR2 is 4, in the CSI part1 fed back by the terminal, the number of four delays selected by the CMR according to the order of the configured CMRs is fed back, and the length of each bit sequence for indicating the number is

Number

[0094] Also, for example, for obtaining the joint transmission PMI of N TRPs, for the i-th target resource (associated with the i-th TRP), when the network is configured such that M max,i = 4, the length in CSI part1 is

Number

[0095] Also, in one possible implementation, the number M of the base vectors v,i The length of the bit sequence corresponding to the first indication information is

Number

Number

[0096] Optionally, when the i-th target resource is the target resource with the strongest energy among the N target resources, the length of the bit sequence corresponding to the first indication information of the number M of the base vectors v,i is

Number

Number

[0097] In the above possible implementation manners, optionally, in the first part of the CSI, the first indication information corresponding to the target resource with the strongest energy is located before the first indication information corresponding to the target resource with the non-strongest energy, and the position order of the first indication information corresponding to the target resource with the non-strongest energy in the first part of the CSI is the same as the order pre-configured by the network-side device, or the position order of the first indication information corresponding to the target resource with the non-strongest energy in the first part of the CSI is the same as the configuration order of the target resource with the non-strongest energy. For example, the mapping priority of the first indication information corresponding to the target resource with the strongest energy is higher than the mapping priority of the first indication information corresponding to the target resource with the non-strongest energy, and the mapping order of the first indication information corresponding to the target resource with the non-strongest energy in the first part of the CSI is the same as the order pre-configured by the network-side device, or the mapping order of the first indication information corresponding to the target resource with the non-strongest energy in the first part of the CSI is the same as the configuration order of the target resource with the non-strongest energy. That is, the terminal preferentially maps the first indication information corresponding to the target resource with the strongest energy to the first part of the CSI, and then maps the first indication information corresponding to the target resource with the non-strongest energy. When there are multiple target resources with the non-strongest energy, the first indication information of the multiple target resources with the non-strongest energy is mapped according to the order pre-configured by the network-side device or the configuration order of the target resources with the non-strongest energy.

[0098] For example, the mapping priority of the bit sequence of the first indication information of the number of base vectors of the strongest measurement resource is higher than that of other measurement resources, and the mapping order of other measurement resources is the same as the order pre-configured by the network or the same as the configuration order of the measurement resources. Or, the mapping priority of the bit sequence of the first indication information of the number of base vectors of the measurement resource group where the strongest measurement resource is located is higher than that of other measurement resource groups, and the mapping order of other measurement resource groups is the same as the order pre-configured by the network or the same as the configuration order of the measurement resource group.

[0099] For example, for the joint transmission PMI acquisition of N TRPs, only the strongest coefficients corresponding to the strongest measurement resources are cyclically shifted to delay 0, and when the terminal feeds back the indication of the strongest measurement resource, a bit sequence corresponding to the strongest measurement resource is added in CSI part1, where the length of the bit sequence corresponding to the strongest measurement resource is

Number

Number

[0100] In the above possible implementation manners, optionally, in S214, before the terminal transmits CSI, the method is that the terminal determines the number of base vectors M of the i-th target resource v,iincluding setting the bit sequence corresponding to the first instruction information of [[ID=]] to an all-zero sequence, where when the i-th target resource is not the target resource with the strongest energy, the all-zero sequence indicates that the terminal does not recommend the i-th target resource. That is, the terminal has the number M of basis vectors of the i-th target resource v,i mapping the bit sequence corresponding to the first instruction information of v,i as an all-zero sequence, where when the i-th target resource is not the target resource with the strongest energy, the all-zero sequence indicates that the terminal does not recommend the i-th target resource. For example, when the bit sequence corresponding to the i-th measurement resource fed back by the terminal is an all-zero sequence, the i-th measurement resource is a measurement resource other than the measurement resource corresponding to the strongest coefficient, indicating that the terminal does not recommend that the TRP associated with this measurement resource perform multi-TRP transmission. In this possible implementation method, the number of the first instruction information of the number of basis vectors fed back by the terminal in CSI part1 may be equal to the number of measurement resources or the number of measurement resource groups configured by the network-side device.

[0101] For example, the network-side device configures four measurement resources CMR0, CMR1, CMR2, and CMR3 (corresponding to four TRPs) to obtain joint transmission PMI, and is configured such that the network-side device enables the terminal to select an appropriate CMR and feedback the corresponding PMI, and is instructed that the maximum number of delays associated with each CMR by the network is 4. The terminal selects CMR0, CMR1, and CMR2 (corresponding to three TRPs) based on the measurement resources to obtain the corresponding PMI parameters. Here, when the number of delays associated with CMR0 is 2, CMR1 is the strongest TRP and the associated number of delays is 3, and the number of delays associated with CMR2 is 4, the terminal preferentially feeds back the number of delays of the strongest TRP in the CSI Part1 fed back, and the length of the bit sequence for indicating the number is

Number

Number

[0102] In each of the above possible implementation manners, when the terminal does not recommend the i-th target resource, the second part of the CSI includes the following corresponding to the i-th target resource: (1) amplitude information and phase information of non-zero coefficients, and (2) spatial domain information, which is indication information corresponding to the i-th target resource for a spatial domain beam, and (3) frequency domain information, which is delay indication information corresponding to the i-th target resource for a delay region, and (4) time domain information, which is Doppler indication information corresponding to the i-th target resource for a time domain or Doppler region, and (5) at least one of non-zero coefficient indication information is not included.

[0103] According to the above possible implementation manners, the overhead that the PMI coefficient is fed back to the CSI part2 can be reduced.

[0104] In one possible implementation manner, S214 may further include the following steps.

[0105] Step 1: The terminal determines the positions of the M basis vectors corresponding to the i-th target resource based on the change range of the basis vectors corresponding to the i-th target resource. Here, a plurality of the target resources correspond to the same change range of the basis vectors, or different target resources among the plurality of target resources correspond to different change ranges of the basis vectors. Step 2: The terminal transmits third indication information for indicating the positions of the M v,i basis vectors of the i-th target resource.

[0106] According to the above possible implementation manners, the terminal determines the M v,iThe third indication information for indicating the positions of the base vectors can be fed back to the network-side device, whereby the network-side device can determine the positions of the base vectors of each of the i-th target resources fed back by the terminal, and further obtain the PMI fed back by the terminal.

[0107] In one possible implementation manner, in S214, the terminal transmits a second part of the CSI, where the second part of the CSI includes the third indication information. That is, the terminal may map the third indication information of the positions of the M base vectors of the i-th target resource to the second part of the CSI and transmit it. v,i

[0108] Optionally, the length of the bit sequence corresponding to the third indication information of the positions of the M base vectors of the i-th target resource is determined by the number of base vectors M of the i-th target resource and the change range of the base vectors corresponding to the i-th target resource. v,i v,i

[0109] In one possible implementation manner, when the change range of the base vectors is a continuous window, the length of the window corresponding to the i-th target resource is determined by the maximum number of base vectors M configured or associated for the i-th target resource, and / or when the change range of the base vectors is a continuous window, the start position of the window corresponding to the i-th target resource is determined by the maximum number of base vectors M configured or associated for the i-th target resource. max,i max,i

[0110] For example, when a plurality of the target resources correspond to the same change range of the base vectors, that is, when there is one change range of the base vectors, the UE, based on the change range of the base vectors, M v,i ​​​​​Determine the [[i]] basis vectors (where [[i]] represents the [[i]]-th measurement resource or the [[i]]-th measurement resource group), and feedback the positions of the corresponding basis vectors. Here, when the current basis vector change range is a continuous window, the window length is [[M]]. max is only related to. For example, [[2M]]. max is. When the current basis vector change range is a continuous window, the window start position [[M]]. initial is only related to [[M]]. max For example, [[M]]. initial ∈{-[[2M]] max +1,...,0}, and at this time, the length of the selected window start position indication sequence feedback by the terminal in [[CSIpart2]] is

Number

[0111] On the other hand, the length of the [[M]] v,i or [[M]] v,i -1 delay position indication sequences feedback by the terminal in [[CSIpart2]] is related to [[M]] v,i and the change range of the basis vectors. For example,

Number

Number

Number

Number

Number

[0112] On one hand, different target resources among a plurality of target resources correspond to different change ranges of basis vectors, that is, there are change ranges of a plurality of basis vectors, and each change range of a basis vector is associated with one measurement resource or a set of measurement resource groups. When the current basis vector change range is a continuous window, the UE determines M basis vectors based on the start position and length of the window, and feeds back the positions of the corresponding basis vectors. Here, when the current basis vector change range is a continuous window, the window length corresponding to the i-th TRP or TRP group is related to M. For example, it is 2M. When the current basis vector change range is a continuous window, the start position of the i-th window is related to M. For example, M ∈ {-2M + 1,..., 0}, and at this time, the length of the selected window start position indication sequence fed back by the terminal in CSI part 2 is v,i . For example, when the current basis vector change range is a continuous window, the window length corresponding to the i-th TRP or TRP group is related to M. For example, it is 2M. When the current basis vector change range is a continuous window, the start position of the i-th window is related to M. For example, M ∈ {-2M + 1,..., 0}, and at this time, the length of the selected window start position indication sequence fed back by the terminal in CSI part 2 is max,i related. For example, 2M max,i . When the current basis vector change range is a continuous window, the start position of the i-th window is related to M max,i . For example, M initial,i ∈{-2M max,i +1,...,0}, and at this time, the length of the selected window start position indication sequence fed back by the terminal in CSI part 2 is

Number

[0113] On the other hand, the length of the Mv ,i or M v,i -1 basis vector position indication sequences fed back by the terminal in CSI part 2 is related to Mv ,i and the change range of the basis vector. For example,

Number

Number

Number

Number

[0114] In one possible implementation, S214 may further include the terminal sending a non-zero coefficient indication corresponding to the i-th target resource, where the length of the bit sequence corresponding to the non-zero coefficient indication is 2vLMv ,i where v is the rank number of the codebook, and L is either one of the number of spatial domain beams, the number of delay domain delays, and the number of Doppler domain Dopplers, or the product of any two of them. For example, in S214, the UE feeds back a non-zero coefficient indication, and the length of the bit sequence indicated by the non-zero coefficient of each selected target resource is 2vLMv ,i In such a case, the number indicated by the non-zero coefficient is the number of measurement resources selected when fed back. Or, the length of the bit sequence indicated by the non-zero coefficient of each selected measurement resource group is 2vLMv ,i In such a case, the number indicated by the non-zero coefficient is the number of selected measurement resource groups. According to this possible implementation, Mv ,i If Mv is the number of delays of the i-th TRP rank v transmission to be fed back, compared with the network indicating the value of Mv, the feedback by the UE becomes more flexible. When Mv ,i is smaller than Mv, the length of the bit sequence can be reduced. When Mv ,i is larger than Mv, the accuracy of the PMI can be improved. Further, when L is the number of spatial domain beams, by the UE feeding back the value of L, the feedback overhead can be further reduced or the accuracy of the PMI can be improved.

[0115] In one possible implementation, in S212, for the i-th target resource among the plurality of target resources, the terminal obtaining the quantization bit number of the coefficient amplitude of the i-th target resource based on the channel measurement result of the i-th target resource may include, for transmission layer l, according to the fact that the quantization bit number of the coefficient amplitude corresponding to the first target resource is a high bit number and the quantization bit numbers of the coefficient amplitudes corresponding to other target resources are low bit numbers, obtaining the quantization bit number of the coefficient amplitude of the i-th target resource. For the i-th target resource among the plurality of target resources, the terminal obtaining the quantization table of the coefficient amplitude of the i-th target resource based on the channel measurement result of the i-th target resource may include, for transmission layer l, according to the fact that the quantization bit table of the coefficient amplitude corresponding to the first target resource is a high-precision quantization table and the quantization tables of the coefficient amplitudes corresponding to other target resources are low-precision quantization tables, obtaining the quantization table of the coefficient amplitude of the i-th target resource. Here, the first target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, and the other target resources are the target resources other than the first target resource among the plurality of target resources, and l = 0, 1,..., v, where v is the allowable transmission rank. According to this possible implementation, different coefficients use quantization tables with different precisions, and compared with the network instructing a single quantization table, different quantization tables can be used for different coefficient amplitudes or phases, and the feedback overhead can be reduced by using a low-precision quantization table, and it becomes more flexible. For example, when the network instructs a single high-precision quantization table, the feedback by the terminal can introduce a low-precision table to reduce the feedback overhead. When the network instructs a low-precision quantization table, the feedback method by the terminal can introduce a high-precision table to increase the accuracy of the PMI.

[0116] For example, for layer l, among all the coefficients associated with a plurality of measurement resources, the quantization bit number of the coefficient amplitude corresponding to the measurement resource or measurement resource group associated with the coefficient with the strongest amplitude is a high bit number, or the quantization table of the coefficient amplitude is a high-precision quantization table, and the quantization bit number of the coefficient amplitude corresponding to other measurement resources or measurement resource groups is a low bit number, or the quantization table of the coefficient amplitude is a low-precision quantization table, where layer l is any layer of rank v transmission.

[0117] For example, for the cooperative transmission PMI acquisition of rank3 transmission, the UE measures a plurality of measurement resources to obtain a measurement resource group, obtains the projection coefficients on the basis vectors of each measurement resource or measurement resource group, and performs quantization on the measurement resource or measurement resource group associated with the projection coefficient with the largest amplitude using a 4-bit amplitude quantization table, and performs quantization on the projection coefficients associated with other measurement resources or measurement resource groups using a 3-bit amplitude quantization table.

[0118] In another possible implementation manner, in S212, for the terminal to obtain the quantization bit number of the coefficient amplitude of the i-th target resource among a plurality of target resources based on the channel measurement result of the i-th target resource, it includes obtaining the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit number of the coefficient amplitude associated with the target layer in the transmission layer is a high bit number, and the quantization bit number of the coefficient amplitude associated with other layers other than the target layer in the transmission layer is a low bit number. Here, the target layer includes one of the layer with the strongest energy, the layer with the largest sum of coefficient amplitudes, the layer indicated by the layer indication, and a predetermined layer among all layers. For the terminal to obtain the quantization table of the coefficient amplitude of the i-th target resource among a plurality of target resources based on the channel measurement result of the i-th target resource, it includes obtaining the quantization table of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit table of the coefficient amplitude associated with the target layer is a high-precision quantization table, and the quantization table of the coefficient amplitude associated with other layers is a low-precision quantization table. According to this possible implementation manner, different coefficient amplitudes can use quantization tables with different precisions. Compared with the network indicating a single quantization table, different quantization tables can be used for different coefficient amplitudes, the feedback overhead can be reduced by using a low-precision quantization table, and it becomes more flexible. For example, when the network indicates a high-precision quantization table, the feedback by the terminal can introduce a low-precision quantization table to reduce the feedback overhead. When the network indicates a low-precision quantization table, the feedback method by the terminal can introduce a high-precision table to increase the accuracy of the PMI.

[0119] For example, for the strongest layer, the number of quantization bits of the related coefficient amplitude is a high number of bits, or the quantization table of the coefficient amplitude is a high-precision quantization table. For a non-strongest layer, the number of quantization bits of the related coefficient amplitude is a low number of bits, or the quantization table of the coefficient amplitude is a low-precision quantization table.

[0120] For example, for the cooperative transmission PMI acquisition of rank3 (layer 0 / layer 1 / layer 2) transmission, the UE measures a plurality of measurement resources to obtain a measurement resource group, and obtains the projection coefficients on the basis vectors of each measurement resource or measurement resource group. Here, for the projection coefficient corresponding to the strongest layer (layer 0), quantization is performed using a 4-bit amplitude quantization table, and for the projection coefficients associated with other layers, quantization is performed using a 3-bit amplitude quantization table.

[0121] In one possible implementation, in S212, for the i-th target resource among the plurality of target resources, the terminal obtaining the quantization bit number of the coefficient phase of the i-th target resource based on the channel measurement result of the i-th target resource includes, for transmission layer l, obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the fact that the quantization bit number of the coefficient phase corresponding to the second target resource is a high bit number and the quantization bit numbers of the coefficient phases corresponding to other target resources are low bit numbers. For the i-th target resource among the plurality of target resources, the terminal obtaining the quantization table of the coefficient phase of the i-th target resource based on the channel measurement result of the i-th target resource includes, for transmission layer l, obtaining the quantization table of the coefficient phase of the i-th target resource according to the fact that the quantization bit table of the coefficient phase corresponding to the second target resource is a high-precision quantization table and the quantization tables of the coefficient phases corresponding to other target resources are low-precision quantization tables. Here, the second target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, and the other target resources are the target resources other than the second target resource among the plurality of target resources, where l = 0, 1,..., v, and v is the allowable transmission rank. According to this possible implementation, different coefficient phases use quantization bit tables with different precisions. Compared with the network instructing a single quantization table, using different quantization bit tables for different coefficient phases can reduce the feedback overhead by using a low-precision quantization bit table and is more flexible. For example, when the network instructs a single high-precision quantization table, the feedback by the terminal can introduce a low-precision quantization table to reduce the feedback overhead. When the network instructs a low-precision quantization table, the feedback method by the terminal can introduce a high-precision table to increase the accuracy of the PMI.

[0122] For example, for layer l, among all the coefficients associated with a plurality of measurement resources, the number of quantization bits of the coefficient phase corresponding to the measurement resource or measurement resource group associated with the coefficient with the strongest amplitude is a high number of bits, and the number of quantization bits of the coefficient phase corresponding to other measurement resources or measurement resource groups is a low number of bits, where layer l is any layer of rank v transmission.

[0123] In one possible implementation, in S212, for the terminal to obtain the quantization bit number of the coefficient phase of the i-th target resource among a plurality of target resources based on the channel measurement result of the i-th target resource may include obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the fact that the quantization bit number of the coefficient phase associated with the target layer in the transmission layer is a high bit number, and the quantization bit number of the coefficient phase associated with other layers other than the target layer in the transmission layer is a low bit number. Here, the target layer includes one of a layer corresponding to a coefficient with the strongest energy or amplitude, a layer with the largest sum of coefficient amplitudes, a layer indicated by a layer indication, and a predetermined layer among all layers. For the terminal to obtain the quantization table of the coefficient phase of the i-th target resource among a plurality of target resources based on the channel measurement result of the i-th target resource includes obtaining the quantization table of the coefficient phase of the i-th target resource according to the fact that the quantization bit table of the coefficient phase associated with the target layer is a high-precision quantization table, and the quantization table of the coefficient phase associated with the other layer is a low-precision quantization table. According to this possible implementation, different coefficient phases use quantization bit tables with different precisions. Compared with the network instructing a single quantization table, different quantization bit tables are used for different coefficient phases, which can reduce the feedback overhead by using a low-precision quantization bit table and become more flexible. For example, when the network instructs a single high-precision quantization table, the feedback by the terminal can introduce a low-precision quantization table to reduce the feedback overhead. When the network instructs a low-precision quantization table, the feedback method by the terminal can introduce a high-precision table to increase the accuracy of the PMI.

[0124] For example, for the strongest layer, the number of quantization bits of the relevant coefficient phase is a high number of bits, and for a non-strongest layer, the number of quantization bits of the relevant coefficient phase is a low number of bits, or the quantization table of the coefficient amplitude is a low-precision quantization table.

[0125] According to the technical solution of the embodiment of the present application, the terminal can obtain and feedback the number of basis vectors M of the i-th measurement resource or measurement resource group selected for feedback among a plurality of measurement resources or measurement resource groups based on a plurality of measurement resources configured by the network-side device, where each measurement resource or measurement resource group can define the same sequence length to feedback the number of basis vectors, and can also define different sequence lengths for the strongest measurement resource or measurement resource group to feedback the number of basis vectors. The terminal can also recommend a TRP combination to the network according to the number of basis vectors M, reduce the overhead of PMI parameter feedback in the scenario of joint transmission, and improve the accuracy of PMI feedback. v,i and feedback it. Here, each measurement resource or measurement resource group can define the same sequence length to feedback the number of basis vectors, and can also define different sequence lengths for the strongest measurement resource or measurement resource group to feedback the number of basis vectors. The terminal can also recommend a TRP combination to the network according to the number of basis vectors M, reduce the overhead of PMI parameter feedback in the scenario of joint transmission, and improve the accuracy of PMI feedback. v,i and feedback it. Here, each measurement resource or measurement resource group can define the same sequence length to feedback the number of basis vectors, and can also define different sequence lengths for the strongest measurement resource or measurement resource group to feedback the number of basis vectors. The terminal can also recommend a TRP combination to the network according to the number of basis vectors M, reduce the overhead of PMI parameter feedback in the scenario of joint transmission, and improve the accuracy of PMI feedback.

[0126] FIG. 3 shows a flowchart of one method for obtaining PMI in joint transmission in an embodiment of the present application. This method 300 may be executed by a network-side device. In other words, the method may be executed by software or hardware installed in the network-side device. As shown in FIG. 3, this method may include the following steps.

[0127] S310, the network-side device obtains the first PMI parameter of the i-th target resource transmitted by the terminal, where i = 1, 2,..., N, N is an integer less than or equal to M, M is the number of target resources configured by the network-side device for the terminal, and the first PMI parameter is the number of basis vectors M v,iand includes at least one of a change range of basis vectors, a quantization bit number of coefficient amplitudes, a quantization table of coefficient amplitudes, a quantization bit number of coefficient phases, and a quantization table of coefficient phases.

[0128] In an embodiment of the present application, the terminal may transmit the first PMI parameter of the i-th target resource by adopting the method described in the above method 200. Specifically, reference may be made to the description in the above method 200, and no further description will be given here.

[0129] Optionally, the number M of basis vectors v,i is the maximum number of basis vectors configured or associated by the network-side device TIFF2025521200000064.tif612 or less, where TIFF2025521200000065.tif612 is the maximum number of basis vectors configured or associated for the i-th target resource.

[0130] In one possible implementation manner, the method further includes the network-side device uniformly configuring or associating one maximum number of basis vectors for a plurality of the target resources, or the network-side device configuring or associating an independent maximum number of basis vectors for each of the target resources.

[0131] S312. The network-side device obtains the PMI for joint transmission based on the first PMI parameter.

[0132] The network-side device can obtain the PMI fed back by the terminal based on the first PMI parameter of each target resource fed back by the terminal.

[0133] For example, the network-side device obtains the first part of the CSI transmitted by the terminal, where the first part of the CSI is the number M of basis vectors of the i-th target resourcev,i includes the first instruction information, and based on the first instruction information, determines the number of basis vectors M of the i-th target resource included in the second part of the CSI v,i and further, based on the number of basis vectors M of the i-th target resource included in the second part of the CSI v,i obtains the second PMI parameter of the i-th target resource in the second part of the CSI, and finally, based on the first PMI parameter and the second PMI parameter, obtains the PMI corresponding to the i-th target resource.

[0134] For example, the network side determines the size of the second part of the CSI by determining the number of corresponding basis vectors and / or the number of non-zero coefficients based on the first part of the CSI. The second part carries the basis vector instruction information required for PMI recovery and the amplitude-phase quantization information of the coefficients. Taking the Rel-16 Type2 codebook as an example, the network recovers the matrix W1 according to the spatial domain basis vector instruction information carried in the second part of the CSI, and based on the frequency domain basis vector instruction information carried in the second part of the CSI

Number

Number

Number

[0135] In the PMI parameter feedback method for joint transmission according to the embodiments of the present application, the execution entity may be a PMI parameter feedback device for joint transmission. In the embodiments of the present application, taking the PMI parameter feedback device for joint transmission executing the PMI parameter feedback method for joint transmission as an example, the PMI parameter feedback device for joint transmission according to the embodiments of the present application will be described.

[0136] FIG. 4 shows a schematic structural diagram of a PMI parameter feedback device for joint transmission in the embodiments of the present application. As shown in FIG. 4, this device mainly includes a measurement module 401, a first acquisition module 402, and a transmission module 403.

[0137] In the embodiments of the present application, the measurement module 401 is used to perform channel measurement based on M target resources composed of network-side devices. Here, the target resources include measurement resources or measurement resource groups, M is an integer greater than 1, and the first acquisition module 402 is used to obtain the first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource among a plurality of target resources. Here, i = 1, 2,..., N, and N is an integer not exceeding M. The first PMI parameter includes at least one of the number M of basis vectors v,i , the change range of the basis vector, the quantization bit number of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bit number of the coefficient phase, and the quantization table of the coefficient phase. The transmission module 403 is used to transmit the first PMI parameter of the i-th target resource.

[0138] In one possible implementation manner, the number M of basis vectors v,i is less than or equal to the maximum number M of basis vectors configured or associated by network-side devices. Here, M max,i max,iis the maximum number of basis vectors configured or associated for the i-th target resource.

[0139] In one possible implementation, the network-side device uniformly configures or associates one maximum number of basis vectors for a plurality of the target resources, or the network-side device configures or associates an independent maximum number of basis vectors for each of the target resources.

[0140] In one possible implementation, the transmission module 403 transmitting the first PMI parameter of the i-th target resource includes transmitting channel state information CSI, a first part of the CSI includes first indication information, and the first indication information is used to indicate the number of basis vectors M of the i-th target resource v,i for use.

[0141] In one possible implementation, the number of basis vectors M v,i the length of the bit sequence corresponding to the first indication information of is

Number

[0142] In one possible implementation, the first part of the CSI further includes second indication information, and the second indication information is used to indicate the N target resources.

[0143] In one possible implementation, the transmission module 403 is further used for the terminal to perform a zero-padding operation on the first part of the CSI using a 0 sequence, where the length of the first part of the CSI after the zero-padding operation is a predetermined value.

[0144] In one possible implementation, the number of basis vectors Mv,i The length of the bit sequence corresponding to the instruction information is [Number] or max,i where M is the maximum number of basis vectors configured or associated for the i-th target resource.

[0145] In one possible implementation, when the transmission module 403 does not recommend the i-th target resource, the transmission module 403 is further used to set the bit sequence corresponding to the first instruction information of the number M of basis vectors of the i-th target resource to an all-zero sequence. v,i

[0146] In one possible implementation, the position order of the number M of basis vectors of the N target resources in the first part of the CSI of the first instruction information is the same as the order pre-configured by the network-side device, or the position order of the number M of basis vectors of the N target resources in the first part of the CSI of the first instruction information is the same as the configuration order of the plurality of target resources. v,i v,i

[0147] In one possible implementation, the length of the bit sequence corresponding to the first instruction information of the number M of basis vectors is v,i [Number] or [Number] or max,i where M is the maximum number of basis vectors configured or associated for the i-th target resource.

[0148] ​​​​In one possible implementation, when the i-th target resource is the target resource with the strongest energy among the N target resources, the number of basis vectors M v,i The length of the bit sequence corresponding to the first indication information is

number

number

[0149] In one possible implementation manner, in the first part of the CSI, the first instruction information corresponding to the target resource having the strongest energy is located before the first instruction information corresponding to the target resource having a non-strongest energy, and the position order of the first instruction information corresponding to the target resource having a non-strongest energy in the first part of the CSI is the same as the order pre-configured by the network side equipment, or the position order of the first instruction information corresponding to the target resource having a non-strongest energy in the first part of the CSI is the same as the configuration order of the target resource having a non-strongest energy.

[0150] In one possible implementation, the sending module 403 further selects a basis vector number M of the i-th target resource. v,i to set a bit sequence corresponding to the first indication information to an all-zero sequence, where if the i-th target resource is a target resource that is not the strongest in energy, the all-zero sequence indicates that the i-th target resource is not recommended.

[0151] In one possible implementation, when the i-th target resource is not recommended, the second part of the CSI includes the amplitude information and phase information of non-zero coefficients corresponding to the i-th target resource, the spatial region information which is the indication information that the i-th target resource corresponds to a spatial region beam, the frequency region information which is the delay indication information that the i-th target resource corresponds to a delay region, and the time region information which is the Doppler indication information that the i-th target resource corresponds to a time region or a Doppler region, wherein at least one of the non-zero coefficient indication information is not included.

[0152] In one possible implementation, the transmission module 403 transmitting the first PMI parameter of the i-th target resource means determining the positions of M v,i basis vectors of the i-th target resource based on the change range of the basis vectors corresponding to the i-th target resource, where multiple target resources correspond to the same change range of basis vectors, or different target resources among multiple target resources correspond to different change ranges of basis vectors, and further includes transmitting third indication information for indicating the positions of M v,i basis vectors of the i-th target resource.

[0153] In one possible implementation, when the change range of the basis vectors is a continuous window, the length of the window corresponding to the i-th target resource is the maximum number of basis vectors M max,i configured or associated for the i-th target resource.Determined by, and / or when the change range of the base vectors is a continuous window, the start position of the window corresponding to the i-th target resource is the maximum number M of base vectors configured or associated for the i-th target resource max,i Determined by

[0154] In one possible implementation, the transmission module 403 transmitting the third indication information includes transmitting a second part of the CSI, where the third indication information is included in the second part of the CSI

[0155] In one possible implementation, the M v,i The length of the bit sequence corresponding to the third indication information of the positions of the M base vectors of the i-th target resource is determined by the number M of base vectors of the i-th target resource v,i And the change range of the base vectors corresponding to the i-th target resource

[0156] In one possible implementation, the transmission module 403 transmitting the first PMI parameter of the i-th target resource Further includes transmitting a non-zero coefficient indication corresponding to the i-th target resource, where the length of the bit sequence corresponding to the non-zero coefficient indication is 2vLM v,i Where v is the rank number of the codebook, and L is one of the number of spatial domain beam numbers, the number of delay domain delays, and the number of Doppler domain Dopplers, or the product of any two of them

[0157] In one possible implementation, the number M of base vectors v,i Includes at least one of the number of spatial domain base vectors, the number of frequency domain base vectors, and the number of time domain base vectors

[0158] In one possible implementation manner, for the first obtaining module 402 to obtain the quantization bit number of the coefficient amplitude of the i-th target resource includes obtaining the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that, for transmission layer l, the quantization bit number of the coefficient amplitude corresponding to the first target resource is a high bit number, and the quantization bit number of the coefficient amplitude corresponding to other target resources is a low bit number, For the first obtaining module 402 to obtain the quantization table of the coefficient amplitude of the i-th target resource includes obtaining the quantization table of the coefficient amplitude of the i-th target resource according to the fact that, for transmission layer l, the quantization bit table of the coefficient amplitude corresponding to the first target resource is a high-precision quantization table, and the quantization table of the coefficient amplitude corresponding to other target resources is a low-precision quantization table, Here, the first target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, and the other target resources are the target resources other than the first target resource among the plurality of target resources, and l = 0, 1,..., v, where v is the allowable transmission rank.

[0159] In one possible implementation manner, for the first obtaining module 402 to obtain the quantization bit number of the coefficient amplitude of the i-th target resource includes obtaining the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit number of the coefficient amplitude associated with the target layer among the transmission layers is a high bit number, and the quantization bit number of the coefficient amplitude associated with other layers other than the target layer among the transmission layers is a low bit number, where the target layer includes one of the layer with the strongest energy, the layer with the largest sum of coefficient amplitudes, the layer indicated by the layer indication, and a predetermined layer among all the layers. The first acquisition module 402 obtaining the quantization table of the coefficient amplitude of the i-th target resource includes obtaining the quantization table of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit table of the coefficient amplitude associated with the target layer is a high-precision quantization table, and the quantization table of the coefficient amplitude associated with the other layers is a low-precision quantization table.

[0160] In one possible implementation, the first acquisition module 402 obtaining the quantization bit number of the coefficient phase of the i-th target resource includes obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the fact that, for transmission layer l, the quantization bit number of the coefficient phase corresponding to the second target resource is a high bit number, and the quantization bit number of the coefficient phase corresponding to the other target resources is a low bit number. The first acquisition module 402 obtaining the quantization table of the coefficient phase of the i-th target resource includes obtaining the quantization table of the coefficient phase of the i-th target resource according to the fact that, for transmission layer l, the quantization bit table of the coefficient phase corresponding to the second target resource is a high-precision quantization table, and the quantization table of the coefficient phase corresponding to the other target resources is a low-precision quantization table. Here, the second target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, the other target resources are the target resources other than the second target resource among the plurality of target resources, and l = 0, 1,..., v, where v is the allowed transmission rank.

[0161] In one possible implementation manner, for the first obtaining module 402 to obtain the quantization bit number of the coefficient phase of the i-th target resource includes obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the fact that the quantization bit number of the coefficient phase associated with the target layer in the transmission layer is a high bit number and the quantization bit number of the coefficient phase associated with other layers other than the target layer in the transmission layer is a low bit number. Here, the target layer includes one of a layer corresponding to a coefficient with the strongest energy or amplitude, a layer with the largest sum of coefficient amplitudes, a layer indicated by a layer indication, and a predetermined layer among all layers. For the first obtaining module 402 to obtain the quantization table of the coefficient phase of the i-th target resource includes obtaining the quantization table of the coefficient phase of the i-th target resource according to the fact that the quantization bit table of the coefficient phase associated with the target layer is a high-precision quantization table and the quantization table of the coefficient phase associated with other layers is a low-precision quantization table.

[0162] The PMI parameter feedback device for joint transmission in the embodiments of the present application may be an electronic device, for example, an electronic device having an operating system, or a component in an electronic device, for example, an integrated circuit or a chip. This electronic device may be a terminal or other device other than a terminal. Exemplarily, the terminal may include the types of terminal 11 listed above, but is not limited thereto. Other devices may be a server, a network-attached storage (NAS), etc., and the embodiments of the present application are not specifically limited.

[0163] The PMI parameter feedback device for joint transmission according to the embodiments of the present application realizes each process realized by the method embodiment of FIG. 2 and can achieve the same technical effect. To avoid repeated description, it will not be described further here.

[0164] FIG. 5 shows a schematic structure diagram of a PMI acquisition device for joint transmission in an embodiment of the present application. As shown in FIG. 5, this device 500g mainly includes a second acquisition module 501 and a third acquisition module 502.

[0165] In an embodiment of the present application, the second acquisition module 501 is used to acquire the first PMI parameter of the i-th target resource transmitted by the terminal, where i = 1, 2,..., N, and N is an integer less than or equal to M, and M is the number of target resources configured for the terminal by the network-side device. The first PMI parameter includes at least one of the number of basis vectors M v,i the change range of the basis vectors, the quantization bit number of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bit number of the coefficient phase, and the quantization table of the coefficient phase. The third acquisition module 502 is used to acquire the PMI of joint transmission based on the first PMI parameter.

[0166] In one possible implementation, the number of basis vectors M v,i is less than or equal to the maximum number of basis vectors M configured or associated by the network-side device, where M max,i is the maximum number of basis vectors configured or associated for the i-th target resource. max,i is the maximum number of basis vectors configured or associated for the i-th target resource.

[0167] In one possible implementation, the device uniformly configures or associates one maximum number of basis vectors for a plurality of the target resources, or further includes a configuration module for configuring or associating an independent maximum number of basis vectors for each of the target resources.

[0168] In one possible implementation, the second acquisition module 501 acquiring the PMI of joint transmission based on the first PMI parameter means that Obtaining a first portion of CSI transmitted by the terminal, where the first portion of the CSI includes first indication information of the number M of base vectors of the i-th target resource v,i and Based on the first indication information, determining the number M of base vectors of the i-th target resource included in the second portion of the CSI v,i and Based on the number M of base vectors of the i-th target resource included in the second portion of the CSI, obtaining a second PMI parameter of the i-th target resource in the second portion of the CSI v,i and Obtaining the PMI corresponding to the i-th target resource based on the first PMI parameter and the second PMI parameter.

[0169] The PMI acquisition apparatus for joint transmission according to the embodiments of the present application realizes each process realized by the embodiments of the method in FIG. 3 and can achieve the same technical effects. To avoid repetition of the description, it will not be described further here.

[0170] Optionally, as shown in FIG. 6, the embodiments of the present application further provide a communication device 600, which includes a processor 601 and a memory 602. The memory 602 stores a program or instruction that can run on the processor 601. For example, when this communication device 600 is a terminal, when this program or instruction is executed by the processor 601, each step of the embodiment of the PMI parameter feedback method for joint transmission is realized, and the same technical effects can be achieved. When this communication device 600 is a network-side device, when this program or instruction is executed by the processor 601, each step of the embodiment of the PMI acquisition method for joint transmission is realized, and the same technical effects can be achieved. To avoid repetition of the description, it will not be described further here.

[0171] Embodiments of this application further provide a terminal, which includes a processor and a communication interface. The processor is used to implement each step of the PMI parameter feedback method for joint transmission, and the communication interface is used to communicate with external devices. Embodiments of this terminal correspond to embodiments of the above method on the terminal side. Each implementation process and implementation method of the embodiments of the above method can be applied to embodiments of this terminal and can achieve the same technical effects. Specifically, FIG. 7 is a schematic hardware structure diagram for implementing the terminal according to an embodiment of this application.

[0172] This terminal 700 includes at least some of the members such as a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710, but is not limited thereto.

[0173] As can be understood by those skilled in the art, the terminal 700 may further include a power source (for example, a battery) for supplying power to each member. The power source may be logically connected to the processor 710 by a power management system, so that functions such as charge and discharge management and power consumption management can be realized by the power management system. The terminal structure shown in FIG. 7 does not constitute a limitation on the terminal. The terminal may include more or fewer members than the members shown in the figure, or a combination of some members, or an arrangement of different members, which will not be described further here.

[0174] It should be understood that in the embodiments of the present application, the input unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042. The graphics processor 7041 processes the image data of a still image or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. The other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, and an operation lever, which will not be further described herein.

[0175] In the embodiments of the present application, after receiving the downlink data from the network-side device, the radio frequency unit 701 can transmit it to the processor 710 for processing. Also, the radio frequency unit 701 can transmit the uplink data to the network-side device. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0176] Memory 709 may be used to store software programs or instructions and various data. Memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Here, the first storage area can store an operating system, application programs or instructions required for at least one function (such as a voice playback function, an image playback function, etc.). Note that Memory 709 may include volatile memory or non-volatile memory, or Memory 709 may include both volatile and non-volatile memory. Here, the non-volatile memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM) or a flash memory. The volatile memory may be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDRSDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM) and a Direct Rambus RAM (DRRAM). The Memory 709 in the embodiments of the present application includes these and any other suitable types of memory, but is not limited thereto.

[0177] Processor 710 may include one or more processing units. Optionally, processor 710 integrates an application processor and a modem processor, where the application processor mainly processes operations related to the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication signals, for example, it is a baseband processor. As can be understood, the above modem processor may not be integrated into processor 710.

[0178] Here, processor 710 performs channel measurement based on M target resources constituted by network side devices, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1, obtains a first PMI parameter of the i-th target resource based on the channel measurement result of the i-th target resource among the plurality of target resources, where i = 1, 2,..., N, N is an integer less than or equal to M, and the first PMI parameter includes at least one of the number of basis vectors M v,i and the change range of the basis vectors, the quantization bit number of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bit number of the coefficient phase, and the quantization table of the coefficient phase, The radio frequency unit 701 is used to transmit the first PMI parameter of the i-th target resource.

[0179] The embodiments of the present application further provide a network side device, including a processor and a communication interface. The processor is used to implement each step of the PMI acquisition method for joint transmission in the above embodiments, and the communication interface is used to communicate with external devices. This embodiment of the network side device corresponds to the embodiment of the above network side device method, and each implementation process and implementation method of the above method embodiment can be applied to this embodiment of the network side device, and the same technical effect can be achieved.

[0180] Specifically, the embodiments of the present application further provide a network-side device. As shown in FIG. 8, this network-side device 800 includes an antenna 801, a radio frequency device 802, a baseband device 803, a processor 804, and a memory 805. The antenna 801 and the radio frequency device 802 are connected. In the uplink direction, the radio frequency device 802 receives information via the antenna 801 and transmits the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be transmitted, transmits it to the radio frequency device 802, and the radio frequency device 802 processes the received information and then sends it out via the antenna 801.

[0181] In the above embodiments, the method executed by the network-side device may be implemented in the baseband device 803, and this baseband device 803 includes a baseband processor.

[0182] The baseband device 803 may include, for example, at least one baseband board, and a plurality of chips are installed on this baseband board. As shown in FIG. 8, one of the chips is, for example, a baseband processor, which is connected to the memory 805 via a bus interface, calls a program in the memory 805, and executes the network device operations shown in the embodiments of the above method.

[0183] This network-side device may further include a network interface 806, and this interface is, for example, a common public radio interface (CPRI).

[0184] Specifically, the network-side device 800 in the embodiment of the present application further includes instructions or programs stored in the memory 805 and executable on the processor 804. The processor 804 calls the instructions or programs in the memory 805, executes the methods executed by the respective modules shown in FIG. 5, achieves the same technical effects, and to avoid repetition of the description, it will not be further described herein.

[0185] The embodiment of the present application further provides a readable storage medium, in which a program or instructions are stored. When this program or instructions are executed by a processor, each process of the embodiment of the PMI parameter feedback method for joint transmission or each process of the embodiment of the PMI acquisition method for joint transmission is realized, and the same technical effects can be achieved. To avoid repetition of the description, it will not be further described herein.

[0186] Here, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk, or an optical disk.

[0187] The embodiment of the present application further provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor runs a program or instructions and is used to realize each process of the embodiment of the PMI parameter feedback method for joint transmission or each process of the embodiment of the PMI acquisition method for joint transmission, and the same technical effects can be achieved. To avoid repetition of the description, it will not be further described herein.

[0188] It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-level chip, a system chip, a chip system, or a system-on-chip, etc.

[0189] Embodiments of the present application further provide a computer program / program product, the computer program / program product being stored in a storage medium, the computer program / program product being executed by at least one processor to implement each process of the embodiment of the PMI parameter feedback method for joint transmission or to implement each process of the embodiment of the PMI acquisition method for joint transmission, and being able to achieve the same technical effect, and thus will not be described further here to avoid repetition of the description.

[0190] Embodiments of the present application further provide a PMI parameter feedback system for joint transmission. This system includes a terminal and a network-side device. The terminal may be used to execute the steps of the PMI parameter feedback method for joint transmission described above, and the network-side device may be used to execute the steps of the PMI acquisition method for joint transmission described above.

[0191] It should be noted that in this specification, the term "including", "comprising" or any other variation thereof is intended to cover non-exclusive "including", so that a process, method, article or device including a series of elements includes not only those elements but also other elements not explicitly listed or elements specific to such a process, method, article or device. In the case of no further limitation, for an element defined by the phrase "including one...", it is not excluded that there are other same elements in the process, method, article or device including this element. It should be pointed out that the scope of the method and device in the embodiments of the present application is not limited to executing functions in the order illustrated or discussed, and may include executing functions in a basically simultaneous manner or in a reverse order based on the related functions. For example, a method described in a procedure different from the described one can be executed, and various steps can be added, omitted or combined. Also, features described with reference to some examples can be combined in other examples.

[0192] As can be clearly understood by those skilled in the art from the description of the above embodiments, the method of the above embodiments can be realized in the form of software and the necessary general-purpose hardware platform. Of course, it may also be realized by hardware, but in many cases, the former is a more preferred embodiment. Based on such an understanding, the technical solution of the present application, in essence or the part that has contributed to the prior art, may be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0193] The above has described the embodiments of the present application in conjunction with the drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely exemplary and not restrictive. Those skilled in the art can perform many forms without departing from the spirit of the present application and the scope of the claims, and all belong to the protection scope of the present application.

Claims

1. A precoding matrix indicator (PMI) parameter feedback method for joint transmission, comprising: a terminal performing channel measurement based on M target resources configured by a network-side device, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1; The terminal obtains a first PMI parameter of the i-th target resource based on a channel measurement result of the i-th target resource among M target resources, where i = 1, 2,..., N, N is an integer less than or equal to M, and the first PMI parameter includes at least one of the number of basis vectors M ｖ，ｉ and the change range of the basis vectors, and the number of quantization bits of the coefficient amplitude, and the quantization table of the coefficient amplitude, and the number of quantization bits of the coefficient phase, and the quantization table of the coefficient phase the terminal transmitting a first PMI parameter of the i-th target resource.

2. The number M of the base vectors ｖ，ｉ is the maximum number M of the base vectors configured or associated by the network-side device ｍａｘ，ｉ is as follows, where M ｍａｘ，ｉ is the maximum number of base vectors configured or associated for the i-th target resource, according to the method of claim 1

3. The network-side device uniformly configures or associates one maximum number of basis vectors for a plurality of the target resources, or The network-side device configures or associates an independent maximum number of basis vectors for each of the target resources. The method according to claim 2.

4. The terminal transmitting the first PMI parameter of the i-th target resource includes: including the terminal transmitting channel state information (CSI), a first part of the CSI including first indication information, the first indication information being used to indicate the number M of basis vectors of the i-th target resource ｖ，ｉ The method according to claim 1, which is used to indicate ｖ，ｉ .

5. The number M of the basis vectors ｖ，ｉ The length of the bit sequence corresponding to the first instruction information of 【Number 1】 and where M ｍａｘ，ｉ is the maximum number of basis vectors configured or associated for the i-th target resource, the method of claim 4.

6. The first part of the CSI further includes second indication information, and the second indication information is used to indicate the N target resources. The method according to claim 5.

7. Before the terminal transmits the CSI, the method further includes the terminal performing a zero-padding operation on the first part of the CSI using a zero sequence, where the length of the first part of the CSI after the zero-padding operation is a predetermined value. The method according to claim 6.

8. The number M of the basis vectors ｖ，ｉ The length of the bit sequence corresponding to the instruction information of 【Number 2】 and where M ｍａｘ，ｉ is the maximum number of basis vectors configured or associated for the i-th target resource, the method according to claim 4.

9. Before the terminal transmits channel state information (CSI), the method includes: When the terminal does not recommend the i-th target resource, the terminal further includes setting a bit sequence corresponding to first instruction information of the base vector number M of the i-th target resource to an all-zero sequence. ｖ，ｉ The method according to claim 8, further comprising setting a bit sequence corresponding to first instruction information of the base vector number M of the i-th target resource to an all-zero sequence.

10. The number of base vectors M of the N target resources ｖ，ｉ The positional order in the first part of the CSI of the first indication information of ｖ，ｉ is the same as the order preconfigured by the network-side device, or the number of base vectors M of the N target resources ｖ，ｉ The positional order in the first part of the CSI of the first indication information of ｖ，ｉ is the same as the configuration order of the plurality of target resources. The method according to claim 5 or 8

11. The number M of the basis vectors ｖ，ｉ The length of the bit sequence corresponding to the first instruction information of 【Mathematics 3】 or 【Number 4】 and where M ｍａｘ，ｉ is the maximum number of basis vectors configured or associated for the i-th target resource, the method of claim 4.

12. When the i-th target resource is the target resource with the strongest energy among the N target resources, the number M of basis vectors ｖ，ｉ The length of the bit sequence corresponding to the first instruction information of is 【Number 5】 and when the i-th target resource is not the target resource with the strongest energy among the N target resources, the number M of basis vectors ｖ，ｉ The length of the bit sequence corresponding to the first instruction information of 【Number 6】 The method according to claim 11.

13. In the first part of the CSI, the first indication information corresponding to the target resource with the strongest energy is located before the first indication information corresponding to the target resource that does not have the strongest energy, and the positional order of the first indication information corresponding to the target resource that does not have the strongest energy in the first part of the CSI is the same as the order preconfigured by the network-side device, or the positional order of the first indication information corresponding to the target resource that does not have the strongest energy in the first part of the CSI is the same as the configuration order of the target resource that does not have the strongest energy. The method according to claim 12.

14. Before the terminal transmits channel state information CSI, the method includes: The base vector number M of the i-th target resource of the terminal ｖ，ｉ including setting the bit sequence corresponding to the first instruction information of to an all-zero sequence, where, when the i-th target resource is a target resource that is not the one with the strongest energy, the all-zero sequence indicates that the terminal does not recommend the i-th target resource, the method according to claim 12.

15. When the terminal does not recommend the i-th target resource, the second part of the CSI does not include at least one of the following information corresponding to the i-th target resource: Amplitude information and phase information of a non-zero coefficient, Spatial region information, which is indication information indicating that the i-th target resource corresponds to a spatial region beam, Frequency region information, which is delay indication information indicating that the i-th target resource corresponds to a delay region, Time region information, which is Doppler indication information indicating that the i-th target resource corresponds to a time region or a Doppler region, Non-zero coefficient indication information. The method according to claim 9 or 14.

16. The terminal transmitting the first PMI parameter of the i-th target resource means: Based on the change range of the basis vector corresponding to the i-th target resource by the terminal, M of the i-th target resource ｖ，ｉ It is to determine the positions of the basis vectors, wherein a plurality of the target resources correspond to the same change range of the basis vector, or different target resources among the plurality of target resources correspond to different change ranges of the basis vector, and The terminal transmits third instruction information, and the third instruction information is for instructing positions of M basis vectors of the i-th target resource. ｖ，ｉ The method according to any one of claims 2 to 15, further comprising the above.

17. When the change range of the base vectors is a continuous window, the length of the window corresponding to the i-th target resource is the maximum number of base vectors M configured or associated for the i-th target resource ｍａｘ，ｉ is determined by, and / or When the change range of the base vectors is a continuous window, the start position of the window corresponding to the i-th target resource is the maximum number of base vectors M configured or associated for the i-th target resource ｍａｘ，ｉ The method according to claim 16, determined by

18. The terminal transmitting third indication information means: The terminal transmitting the second part of the CSI, where the second part of the CSI includes the third indication information. The method according to claim 16.

19. The M of the i-th target resource ｖ，ｉ The length of the bit sequence corresponding to the third instruction information of the positions of the M base vectors is the number M of the base vectors of the i-th target resource ｖ，ｉ and is determined by the range of change of the base vectors corresponding to the i-th target resource, the method according to claim 18

20. The terminal transmitting the first PMI parameter of the i-th target resource means: Further comprising the terminal sending a non-zero coefficient indication corresponding to the i-th target resource, wherein the length of the bit sequence corresponding to the non-zero coefficient indication is 2vL ｖ，ｉ where v is the rank number of the codebook, and L is one of the number of spatial domain beams, the number of delay domain delays, and the number of Doppler domain Dopplers, or the product of any two of them. The method according to any one of claims 2 to 19.

21. The number M of the base vectors ｖ，ｉ is Including at least one of the number of spatial region basis vectors, The number of frequency region basis vectors, The number of time region basis vectors. The method according to any one of claims 2 to 20.

22. Based on the channel measurement result of the i-th target resource among the plurality of target resources, the terminal obtaining the quantization bit number of the coefficient amplitude of the i-th target resource includes, for transmission layer l, obtaining the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit number of the coefficient amplitude corresponding to the first target resource is a high bit number and the quantization bit numbers of the coefficient amplitudes corresponding to other target resources are low bit numbers, Based on the channel measurement result of the i-th target resource among the plurality of target resources, the terminal obtaining the quantization table of the coefficient amplitude of the i-th target resource includes, for transmission layer l, obtaining the quantization table of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit table of the coefficient amplitude corresponding to the first target resource is a high-precision quantization table and the quantization tables of the coefficient amplitudes corresponding to other target resources are low-precision quantization tables, Here, the first target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, the other target resources are the target resources other than the first target resource among the plurality of target resources, l = 0, 1,..., v, where v is the allowable transmission rank. The method according to any one of claims 1 to 21.

23. Based on the channel measurement result of the i-th target resource among the plurality of target resources, the terminal obtaining the quantization bit number of the coefficient amplitude of the i-th target resource includes obtaining the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit number of the coefficient amplitude associated with the target layer among the transmission layers is a high bit number and the quantization bit numbers of the coefficient amplitudes associated with other layers other than the target layer among the transmission layers are low bit numbers. Here, the target layer includes one of the layer with the strongest energy, the layer with the largest sum of coefficient amplitudes, the layer indicated by a layer indication, and a predetermined layer among all the layers. The terminal obtaining a quantization table of the coefficient amplitude of the i-th target resource based on the channel measurement result of the i-th target resource among a plurality of target resources includes obtaining the quantization table of the coefficient amplitude of the i-th target resource according to the quantization bit table of the coefficient amplitude associated with the target layer being a high-precision quantization table and the quantization table of the coefficient amplitude associated with the other layer being a low-precision quantization table, the method according to any one of claims 1 to 21.

24. The terminal obtaining the quantization bit number of the coefficient phase of the i-th target resource based on the channel measurement result of the i-th target resource among a plurality of target resources includes obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the quantization bit number of the coefficient phase corresponding to the second target resource being a high bit number and the quantization bit number of the coefficient phase corresponding to other target resources being a low bit number for transmission layer l. The terminal obtaining a quantization table of the coefficient phase of the i-th target resource based on the channel measurement result of the i-th target resource among a plurality of target resources includes obtaining the quantization table of the coefficient phase of the i-th target resource according to the quantization bit table of the coefficient phase corresponding to the second target resource being a high-precision quantization table and the quantization table of the coefficient phase corresponding to other target resources being a low-precision quantization table for transmission layer l. Here, the second target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, the other target resources are the target resources other than the second target resource among the plurality of target resources, l = 0, 1,..., v, and v is the allowed transmission rank, the method according to any one of claims 1 to 21.

25. Based on the channel measurement result of the i-th target resource among a plurality of target resources, the terminal obtains the quantization bit number of the coefficient phase of the i-th target resource, which includes obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the fact that the quantization bit number of the coefficient phase associated with the target layer in the transmission layer is a high bit number, and the quantization bit number of the coefficient phase associated with other layers other than the target layer in the transmission layer is a low bit number. Here, the target layer includes one of a layer corresponding to a coefficient with the strongest energy or amplitude, a layer with the largest sum of coefficient amplitudes, a layer indicated by a layer indication, and a predetermined layer among all layers. Based on the channel measurement result of the i-th target resource among a plurality of target resources, the terminal obtains the quantization table of the coefficient phase of the i-th target resource, which includes obtaining the quantization table of the coefficient phase of the i-th target resource according to the fact that the quantization bit table of the coefficient phase associated with the target layer is a high-precision quantization table, and the quantization table of the coefficient phase associated with other layers is a low-precision quantization table. The method according to any one of claims 1 to 21.

26. A method for obtaining PMI for joint transmission, To obtain the first PMI parameter of the i-th target resource transmitted by the terminal by the network-side device, where i = 1, 2,..., N, N is an integer less than or equal to M, and M is the number of target resources configured by the network-side device for the terminal, and the first PMI parameter includes the number of basis vectors M ｖ，ｉ and at least one of the change range of the basis vectors, the quantization bits of the coefficient amplitude, the quantization table of the coefficient amplitude, the quantization bits of the coefficient phase, and the quantization table of the coefficient phase The method for obtaining PMI for joint transmission includes the network-side device obtaining the PMI for joint transmission based on the first PMI parameter.

27. The number M of the basis vectors ｖ，ｉ is the maximum number M of the basis vectors configured or associated by the network-side device ｍａｘ，ｉ is as follows, where M ｍａｘ，ｉ is the maximum number of basis vectors configured or associated for the i-th target resource, according to the method of claim 26

28. The method includes the network-side device uniformly configuring or associating one maximum base vector number for a plurality of the target resources, or the method according to claim 27 further includes the network-side device configuring or associating an independent maximum base vector number for each of the target resources.

29. Based on the first PMI parameter, the network-side device obtains the PMI for joint transmission, The network-side device obtains a first portion of the CSI transmitted by the terminal, where the first portion of the CSI includes first indication information for indicating the number M of basis vectors of the i-th target resource ｖ，ｉ and The network-side device determines the number M of base vectors of the i-th target resource included in the second part of the CSI based on the first indication information ｖ，ｉ and The network-side device determines the number of base vectors M of the i-th target resource included in the second part of the CSI ｖ，ｉ and based on this, obtains a second PMI parameter of the i-th target resource in the second part of the CSI The method according to any one of claims 26 to 28 includes the network-side device obtaining the PMI corresponding to the i-th target resource based on the first PMI parameter and the second PMI parameter.

30. A PMI parameter feedback apparatus for joint transmission, a measurement module for performing channel measurement based on M target resources constituted by network side devices, where the target resources include measurement resources or measurement resource groups, and M is an integer greater than 1, A first acquisition module for acquiring a first PMI parameter of the i-th target resource based on a channel measurement result of the i-th target resource among a plurality of target resources, where i = 1, 2,..., N, N is an integer less than or equal to M, and the first PMI parameter includes the number of basis vectors M ｖ，ｉ , a first acquisition module including at least one of a change range of basis vectors, a quantization bit number of coefficient amplitudes, a quantization table of coefficient amplitudes, a quantization bit number of coefficient phases, and a quantization table of coefficient phases and a transmission module for transmitting a first PMI parameter of the i-th target resource. A PMI parameter feedback apparatus for joint transmission.

31. The fact that the transmission module transmits the first PMI parameter of the i-th target resource is Including transmitting channel state information CSI, a first part of the CSI includes first indication information, and the first indication information is used to indicate the number M of basis vectors of the i-th target resource ｖ，ｉ The apparatus according to claim 30, which is used to indicate

32. The transmission module is further configured to set a bit sequence corresponding to first indication information of a base vector number M of the i-th target resource to an all-zero sequence when not recommending the i-th target resource. ｖ，ｉ The apparatus according to claim 31, wherein the transmission module is further configured to set a bit sequence corresponding to first indication information of a base vector number M of the i-th target resource to an all-zero sequence when not recommending the i-th target resource.

33. The fact that the transmission module transmits the first PMI parameter of the i-th target resource is Based on the change range of the basis vector corresponding to the i-th target resource, determine the positions of M ｖ，ｉ basis vectors of the i-th target resource, where a plurality of the target resources correspond to the same change range of the basis vector, or different target resources among the plurality of target resources correspond to different change ranges of the basis vector, and To transmit third instruction information, wherein the third instruction information is for instructing positions of M ｖ，ｉ basis vectors of the i-th target resource, the apparatus according to claim 30, further comprising.

34. The fact that the transmission module transmits the first PMI parameter of the i-th target resource is further comprising transmitting a non-zero coefficient indication corresponding to the i-th target resource, wherein the length of the bit sequence corresponding to the non-zero coefficient indication is 2vL ｖ，ｉ where v is the rank number of the codebook, and L is one of the number of spatial domain beams, the number of delay domain delays, and the number of Doppler domain Dopplers, or the product of any two of them, the apparatus according to any one of claims 30 to 33.

35. The fact that the first acquisition module acquires the quantization bit number of the coefficient amplitude of the i-th target resource includes acquiring the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that, for transmission layer l, the quantization bit number of the coefficient amplitude corresponding to the first target resource is a high bit number, and the quantization bit number of the coefficient amplitude corresponding to other target resources is a low bit number. The fact that the first acquisition module acquires the quantization table of the coefficient amplitude of the i-th target resource includes acquiring the quantization table of the coefficient amplitude of the i-th target resource according to the fact that, for transmission layer l, the quantization bit table of the coefficient amplitude corresponding to the first target resource is a high-precision quantization table, and the quantization table of the coefficient amplitude corresponding to other target resources is a low-precision quantization table. Here, the first target resource is a target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, the other target resources are target resources other than the first target resource among the plurality of target resources, l = 0, 1,..., v, and v is an allowable transmission rank. The apparatus according to any one of Claims 30 to 34.

36. The first acquisition module obtaining the quantization bit number of the coefficient amplitude of the i-th target resource includes obtaining the quantization bit number of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit number of the coefficient amplitude associated with the target layer in the transmission layer is a high bit number, and the quantization bit number of the coefficient amplitude associated with other layers other than the target layer in the transmission layer is a low bit number. Here, the target layer includes one of the layer with the strongest energy, the layer with the largest sum of coefficient amplitudes, the layer indicated by the layer indication, and a predetermined layer among all the layers. The first acquisition module obtaining the quantization table of the coefficient amplitude of the i-th target resource includes obtaining the quantization table of the coefficient amplitude of the i-th target resource according to the fact that the quantization bit table of the coefficient amplitude associated with the target layer is a high-precision quantization table, and the quantization table of the coefficient amplitude associated with the other layer is a low-precision quantization table. The apparatus according to any one of claims 30 to 34. [

37. ] The first acquisition module obtaining the quantization bit number of the coefficient phase of the i-th target resource includes obtaining the quantization bit number of the coefficient phase of the i-th target resource according to the fact that for the transmission layer l, the quantization bit number of the coefficient phase corresponding to the second target resource is a high bit number, and the quantization bit number of the coefficient phase corresponding to other target resources is a low bit number. The first acquisition module obtaining the quantization table of the coefficient phase of the i-th target resource includes obtaining the quantization table of the coefficient phase of the i-th target resource according to the fact that for the transmission layer l, the quantization bit table of the coefficient phase corresponding to the second target resource is a high-precision quantization table, and the quantization table of the coefficient phase corresponding to other target resources is a low-precision quantization table. Here, the second target resource is the target resource associated with the coefficient having the strongest amplitude among all the coefficients associated with the plurality of target resources, the other target resources are the target resources other than the second target resource among the plurality of target resources, where l = 0, 1, …, v, and v is the allowable transmission rank. The apparatus according to any one of claims 30 to 34.

38. That the first acquisition module acquires the number of quantization bits of the coefficient phase of the i-th target resource includes acquiring the number of quantization bits of the coefficient phase of the i-th target resource according to the fact that the number of quantization bits of the coefficient phase associated with the target layer in the transmission layer is a high number of bits, and the number of quantization bits of the coefficient phase associated with other layers other than the target layer in the transmission layer is a low number of bits. Here, the target layer includes one of a layer corresponding to the coefficient with the strongest energy or amplitude, a layer with the largest sum of coefficient amplitudes, a layer indicated by a layer indication, and a predetermined layer among all layers. That the first acquisition module acquires the quantization table of the coefficient phase of the i-th target resource includes acquiring the quantization table of the coefficient phase of the i-th target resource according to the fact that the quantization bit table of the coefficient phase associated with the target layer is a high-precision quantization table, and the quantization table of the coefficient phase associated with other layers is a low-precision quantization table. The apparatus according to any one of claims 30 to 34.

39. A PMI acquisition apparatus for joint transmission, A second acquisition module for acquiring a first PMI parameter of the i-th target resource transmitted by a terminal, where i = 1, 2,..., N, N is an integer less than or equal to M, and M is the number of target resources configured for the terminal by a network-side device, and the first PMI parameter includes the number of basis vectors M ｖ，ｉ and a second acquisition module including at least one of a change range of basis vectors, a quantization bit number of coefficient amplitudes, a quantization table of coefficient amplitudes, a quantization bit number of coefficient phases, and a quantization table of coefficient phases including a third acquisition module for acquiring the PMI of joint transmission based on the first PMI parameter. The PMI acquisition apparatus for joint transmission.

40. A terminal including a processor and a memory, the memory storing a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the PMI parameter feedback method for joint transmission according to any one of claims 1 to 25 are realized. The terminal.

41. A network-side device, comprising a processor and a memory, wherein the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the PMI acquisition method for joint transmission according to any one of claims 26 to 29 are realized.

42. A readable storage medium, wherein a program or instructions are stored in the readable storage medium, and when the program or instructions are executed by a processor, the steps of the PMI parameter feedback method for joint transmission according to any one of claims 1 to 25 are realized, or the steps of the PMI acquisition method for joint transmission according to any one of claims 26 to 39 are realized.

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