Channel state information feedback method, device, equipment and storage medium

Abstract

The present disclosure relates to a channel state information feedback method, apparatus, device, and storage medium, including: receiving configuration information sent by a network device, determining at least one channel measurement resource (CMR) based on the configuration information, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals (NZP CSI-RS); sending channel state information (CSI) to the network device, where the CSI is obtained by a terminal performing channel measurement based on the target CMR. Feedback parameter information corresponding to at least one NZP CSI-RS measured based on the channel measurement resource is fed back in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a channel state information feedback method, apparatus, device, and storage medium. Background Art

[0002] Currently, network equipment can use multiple transmission and receiving points (TRPs) to provide services to terminals. Each TRP can correspond to a non-zero-power (NZP) channel state information reference signal (CSI-RS).

[0003] However, when the terminal does not select a certain NZP CSI-RS, that is, the terminal does not select the TRP corresponding to the NZP CSI-RS, then how the terminal should provide feedback to the network device and how the corresponding NZP CSI-RS channel state information (CSI) should be reported to the network device are problems that need to be solved. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a channel state information feedback method, apparatus, device and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a channel state information feedback method is provided, which is applied to a terminal and includes: receiving configuration information sent by a network device, determining at least one channel measurement resource CMR based on the configuration information, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals NZP CSI-RS; and sending channel state information CSI to the network device, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0006] According to a second aspect of an embodiment of the present disclosure, a channel state information feedback method is provided, which is applied to a network device, including: sending configuration information to a terminal, the configuration information being used by the terminal to determine at least one channel measurement resource CMR, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals NZP CSI-RS; and receiving channel state information CSI sent by the terminal, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0007] According to a third aspect of an embodiment of the present disclosure, a channel state information feedback device is provided, which is configured on a terminal and includes: a receiving module for receiving configuration information sent by a network device; a determination module for determining at least one channel measurement resource CMR based on the configuration information, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals NZP CSI-RS; and a sending module for sending channel state information CSI to the network device, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0008] According to a fourth aspect of an embodiment of the present disclosure, a channel state information feedback device is provided, which is configured in a network device and includes: a sending module for sending configuration information to a terminal, where the configuration information is used by the terminal to determine at least one channel measurement resource CMR, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals NZP CSI-RS; and a receiving module for receiving channel state information CSI sent by the terminal, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0009] According to a fifth aspect of an embodiment of the present disclosure, a channel state information feedback device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute any one of the methods in the first aspect.

[0010] According to a sixth aspect of an embodiment of the present disclosure, a channel state information feedback device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute any one of the methods in the second aspect.

[0011] According to a seventh aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute any one of the methods in the first aspect.

[0012] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute any one of the methods in the second aspect.

[0013] According to a ninth aspect of an embodiment of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is used to execute any one of the methods in the first aspect; and the network device is used to execute any one of the methods in the second aspect.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources is fed back in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 The figure is a schematic diagram of a wireless communication system according to an exemplary embodiment.

[0018] Figure 2 The figure is a flow chart of a channel state information feedback method according to an exemplary embodiment.

[0019] Figure 3 The figure is a flow chart of another channel state information feedback method according to an exemplary embodiment.

[0020] Figure 4 The figure is a schematic diagram of a channel state information feedback device according to an exemplary embodiment.

[0021] Figure 5 The figure is a schematic diagram of another channel state information feedback device according to an exemplary embodiment.

[0022] Figure 6 The figure is a schematic diagram of a channel state information feedback device according to an exemplary embodiment.

[0023] Figure 7 The figure is a schematic diagram of another channel state information feedback device according to an exemplary embodiment. DETAILED DESCRIPTION

[0024] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0025] The communication method involved in the present disclosure can be applied to Figure 1 In the wireless communication system 100 shown in FIG. 1 , the network system may include a network device 110 and a terminal 120. It is understood that Figure 1 The wireless communication system shown is only for schematic illustration. The wireless communication system may also include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices. Figure 1 The embodiment of the present disclosure does not limit the number of network devices and terminals included in the wireless communication system.

[0026] It can be further understood that the wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency-Division Multiple Access (OFDMA), Single Carrier FDMA (SC-FDMA), and Carrier Sense Multiple Access with Collision Avoidance. According to factors such as the capacity, rate, and latency of different networks, the network can be divided into 2G (English: Generation) network, 3G network, 4G network or future evolution network, such as the 5th Generation Wireless Communication System (5G) network. The 5G network can also be called a new radio network (NR). For the convenience of description, the present disclosure sometimes refers to the wireless communication network as simply a network.

[0027] Furthermore, the network device 110 involved in the present disclosure may also be referred to as a wireless access network device. The wireless access network device may be: a base station, an evolved Node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a TRP, etc. It may also be a gNB in ​​an NR system, or it may also be a component or part of a base station. When it is a vehicle-to-everything (V2X) communication system, the network device may also be an on-board device. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device form adopted by the network device are not limited.

[0028] Furthermore, the terminal 120 involved in the present disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal may be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: smart phones (Mobile Phones), pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptop computers, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0029] In the embodiments of the present disclosure, the network device 110 and the terminal 120 can use any feasible wireless communication technology to achieve mutual data transmission. The transmission channel corresponding to the transmission of data from the network device 110 to the terminal 120 is called a downlink channel (DL), and the transmission channel corresponding to the transmission of data from the terminal 120 to the network device 110 is called an uplink channel (UL). It is understood that the network device involved in the embodiments of the present disclosure can be a base station. Of course, the network device can also be any other possible network device, and the terminal can be any possible terminal, and this disclosure is not limited thereto.

[0030] Currently, related technologies discuss the use of multiple TRPs by network devices to serve terminals. For example, a network device may use four TRPs to serve a terminal. In this case, whether the TRPs used for coherent joint transmission (CJT) are configured by the network device or selected by the terminal is an ongoing issue. The multiple TRPs mentioned above can belong to the terminal's serving cell and / or neighboring cells.

[0031] Each TRP can correspond to one NZP CSI-RS. In other words, the issue currently under discussion can be considered as which NZP CSI-RS are used for CSI feedback, and whether it is configured by the network equipment or selected by the terminal.

[0032] In some solutions, for example, if a network device is configured with four NZP CSI-RSs, and the terminal does not select a particular NZP CSI-RS, it means that the terminal has not selected the TRP corresponding to that NZP CSI-RS. Therefore, how the terminal should inform the network device of the selected NZP CSI-RSs and how to indicate the CSI corresponding to the NZP CSI-RSs is a problem that needs to be solved.

[0033] Therefore, the present disclosure provides a channel state information feedback method, apparatus, device, and storage medium. Parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources is fed back in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0034] Figure 2 FIG. 1 is a flow chart of a channel state information feedback method according to an exemplary embodiment. Figure 2 As shown, the method is applied to the terminal and may include the following steps:

[0035] In step S11 , configuration information sent by a network device is received, and at least one channel measurement resource CMR is determined based on the configuration information.

[0036] In some embodiments, a terminal receives configuration information sent by a network device. The terminal may determine at least one channel measurement resource (CMR) based on the received configuration information, wherein a target CMR in the at least one CMR includes multiple NZP CSI-RSs.

[0037] It is understood that the target CMR can be considered as the CMR used by the terminal for channel measurement. One CMR corresponds to one CSI. In one CMR, different TRPs can correspond to different NZP CSI-RSs.

[0038] In some embodiments, the configuration information received by the terminal may be carried in radio resource control (RRC) signaling and / or a medium access control element (MAC CE).

[0039] In step S12, channel state information CSI is sent to the network device.

[0040] In some embodiments, the terminal may send CSI to the network device, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0041] It can be understood that the terminal can perform measurement based on at least one NZP CSI-RS among the multiple NZP CSI-RSs included in the target CMR to obtain CSI.

[0042] In some embodiments, CSI may also be referred to as a CSI report.

[0043] The present disclosure feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0044] In the channel state information feedback method provided in the embodiments of the present disclosure, the CSI includes: first information and second information. The first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR. The first information includes target NZP CSI-RS indication information. The target NZP CSI-RS indication information is used to indicate whether the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS, and the target NZP CSI-RS is part or all of a plurality of NZP CSI-RSs.

[0045] In some embodiments, the CSI sent by the terminal to the network device may include first information and second information. For example, the CSI report may include two parts, namely, part 1 and part 2. Part 1 may correspond to the first information, and part 2 may correspond to the second information. The first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR. It is understood that the first information and the second information are both used to describe the indication information of the NZP CSI-RS in the target CMR, but the first information and the second information are different indication information.

[0046] In some embodiments, the first information may include target NZP CSI-RS indication information. The target NZP CSI-RS indication information may be used to indicate whether the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS. The target NZP CSI-RS may be part or all of the multiple NZP CSI-RSs.

[0047] It can be understood that the target NZP CSI-RS is the NZP CSI-RS whose channel quality is determined to meet the requirements after the terminal performs channel measurement. In other words, the terminal considers that the channel quality of such NZP CSI-RS is good and can communicate with the TRP corresponding to such NZP CSI-RS. Non-target NZP CSI-RS, on the other hand, are NZP CSI-RS whose channel quality does not meet the requirements. It can be considered that the channel quality of such NZP CSI-RS is poor, which is not conducive to terminal communication.

[0048] The present disclosure uses CSI to feedback parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0049] In the channel state information feedback method provided by the embodiment of the present disclosure, the size of the indication field corresponding to the second information is determined based on the first information.

[0050] In some embodiments, the size of the indication field corresponding to the second information may be determined based on the first information.

[0051] For example, the size of part 2 of the CSI is determined based on the information in part 1. The size of part 2 indicates the number of bits occupied by part 2 of the CSI, such as 8 bits or 16 bits.

[0052] In some embodiments, the size of the indication field corresponding to the first information may be a fixed value, such as a pre-set value or a default size specified by a protocol.

[0053] The present disclosure dynamically adjusts the sizes of different parts of the CSI, which is conducive to feedback of parameter information corresponding to at least one NZP CSI-RS, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0054] In the channel state information feedback method provided by the embodiment of the present disclosure, the first information also includes at least one of the following: channel state information reference signal resource indication CRI information; broadband channel quality information CQI; the number of non-zero broadband amplitude coefficients; non-zero coefficient number indication information; non-zero coefficient position indication information; mode indication; rank indication information.

[0055] In some embodiments, the first information may include channel state information reference signal resource indicator (CRI) information.

[0056] In some embodiments, the first information may include wideband channel quality information (CQI).

[0057] In some embodiments, the first information may include the number of non-zero wideband amplitude coefficients.

[0058] It can be understood that the number of non-zero broadband amplitude coefficients refers to the number of broadband amplitude coefficients with non-zero values.

[0059] In some embodiments, the first information may include non-zero coefficient number indication information.

[0060] It can be understood that the non-zero coefficient number indication information can indicate the number of coefficients whose coherent coefficients are non-zero.

[0061] In some embodiments, the first information may include non-zero coefficient position indication information.

[0062] It can be understood that the non-zero coefficient position indication information can indicate the position of the coefficient whose coherence coefficient is non-zero.

[0063] In some embodiments, the first information may include a mode indication.

[0064] For example, the mode indication can be used to indicate the CSI feedback mode, codebook mode, etc. The CSI feedback mode may include mode 1 and mode 2, where mode 1 is feedback based on a single TRP and mode 2 is feedback based on multiple TRPs. Of course, the CSI feedback mode may also include other modes, which is not limited in the present disclosure. The codebook mode may include codebook structure 1 and codebook structure 2, where codebook structure 1 feeds back a frequency domain basis vector (FD basis) information for all NZP CSI-RSs; and codebook structure 2 feeds back a frequency domain basis vector information for each NZP CSI-RS. The codebook mode may also include other modes, which is not limited in the present disclosure.

[0065] In some embodiments, the first information may include rank indication information.

[0066] The present disclosure provides a variety of different first information included in CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0067] In the channel state information feedback method provided by the embodiment of the present disclosure, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N bits correspond one-to-one to the N NZP CSI-RSs; in response to the value of the bit being a specified value, it indicates that the NZP CSI-RS corresponding to the bit is the target NZP CSI-RS.

[0068] In some embodiments, the target NZP CSI-RS indication information in the first information may include N bits. Where N is a positive integer. N represents the number of NZP CSI-RSs included in the target CMR. The N bits in the target NZP CSI-RS indication information correspond one-to-one to the N NZP CSI-RSs included in the target CMR. That is, each bit can be used to describe whether the corresponding NZP CSI-RS is the target NZP CSI-RS. When a bit is a specified value, the NZP CSI-RS corresponding to the bit can be considered to be the target NZP CSI-RS.

[0069] For example, the designated value of a bit may be “0” or “1.” Of course, the designated value may also be any other numerical value or symbol, which is not limited in the present disclosure.

[0070] It can be understood that the TRP corresponding to the determined target NZP CSI-RS is the TRP selected by the terminal for subsequent communication.

[0071] The present disclosure indicates the target NZP CSI-RS among multiple NZP CSI-RSs through the bit in the target NZP CSI-RS indication information, and uses CSI feedback to provide parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0072] In the channel state information feedback method provided in the embodiments of the present disclosure, target NZP CSI-RS indication information is indicated by N non-zero coefficient number indication information, where N is the number of NZP CSI-RSs included in the target CMR, and the N non-zero coefficient number indication information corresponds one-to-one to the N NZP CSI-RSs. In response to the non-zero coefficient number indication information being a specified value, the NZP CSI-RS corresponding to the non-zero coefficient number indication information is the target NZP CSI-RS.

[0073] In some embodiments, the target NZP CSI-RS indication information in the first information can be implicitly indicated by N non-zero coefficient number indication information. Wherein, N is a positive integer. N represents the number of NZP CSI-RSs included in the target CMR. The N non-zero coefficient number indication information in the target NZP CSI-RS indication information corresponds one-to-one to the N NZP CSI-RSs included in the target CMR. In other words, each non-zero coefficient number indication information can be used to describe whether the corresponding NZP CSI-RS is the target NZP CSI-RS. When the non-zero coefficient number indication information is a specified value, the NZP CSI-RS corresponding to the non-zero coefficient number indication information can be considered to be the target NZP CSI-RS.

[0074] For example, the designated value of the non-zero coefficient number indication information may be that the number indicated by the non-zero coefficient number indication information is greater than 0. This indicates that the NZP CSI-RS corresponding to the non-zero coefficient number indication information is the target NZP CSI-RS. Of course, any equivalent method may be used to determine the designated value of the non-zero coefficient number indication information, and this disclosure is not limited thereto.

[0075] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient number indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0076] In the channel state information feedback method provided in the embodiments of the present disclosure, target NZP CSI-RS indication information is indicated by N non-zero coefficient position indication information, where N is the number of NZP CSI-RSs included in the target CMR, and the N non-zero coefficient position indication information corresponds one-to-one to the N NZP CSI-RSs. In response to the non-zero coefficient position indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is the target NZP CSI-RS.

[0077] In some embodiments, the target NZP CSI-RS indication information in the first information can be implicitly indicated by N non-zero coefficient position indication information. Wherein, N is a positive integer. N represents the number of NZP CSI-RSs included in the target CMR. The N non-zero coefficient position indication information in the target NZP CSI-RS indication information corresponds one-to-one to the N NZP CSI-RSs included in the target CMR. That is, each non-zero coefficient position indication information can be used to describe whether the corresponding NZP CSI-RS is the target NZP CSI-RS. When the non-zero coefficient position indication information is a specified value, the NZP CSI-RS corresponding to the non-zero coefficient number indication information can be considered to be the target NZP CSI-RS.

[0078] For example, the non-zero coefficient position indication information may be a specified value, indicating that at least one position has a non-zero coherent coefficient. This indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is the target NZP CSI-RS. Of course, any equivalent method may be used to determine the specified value of the non-zero coefficient position indication information, and this disclosure is not limited thereto.

[0079] In some embodiments, the non-zero coefficient position indication information can be implemented through a non-zero coefficient bitmap. For example, the non-zero coefficient bitmap corresponding to the NZP CSI-RS can indicate that the coherence coefficient of the NZP CSI-RS is indicated as a specified value or 0. In response to the coherence coefficient being indicated as a specified value, it indicates that the coherence coefficient at that position is a non-zero coefficient; in response to the coherence coefficient being indicated as 0, it indicates that the coherence coefficient at that position is 0. It can be understood that the bitmap of the non-target NZP CSI-RS indicates that the coherence coefficients of the NZP CSI-RS are all 0. Only when the bitmap indicates the presence of a non-zero coefficient is the corresponding NZP CSI-RS considered to be the target NZP CSI-RS.

[0080] It can be understood that for the target NZP CSI-RS, there is at least one non-zero coefficient in its coherence coefficients, that is, a non-zero coefficient, while the coherence coefficients corresponding to the non-target NZP CSI-RS are all 0.

[0081] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient position indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0082] In the channel state information feedback method provided by the embodiment of the present disclosure, the second information includes precoding matrix indicator (PMI) information, and the PMI information may include at least one of the following: spatial basis vector parameter information; frequency domain basis vector parameter information; non-zero coefficient position indication information; phase coefficient information; amplitude coefficient information.

[0083] In some embodiments, the second information may include PMI information. The PMI information may be used to describe the precoding matrix used by the NZP CSI-RS in the target CMR for downlink multiple-input multiple-output (MIMO) spatial multiplexing.

[0084] In some embodiments, the PMI information may include space domain basis (SD basis) parameter information.

[0085] In some embodiments, the PMI information may include FD basis parameter information.

[0086] In some embodiments, the PMI information may include non-zero coefficient position indication information.

[0087] It can be understood that, in response to the use of non-zero coefficient position indication information in the first information to implicitly indicate the target NZP CSI-RS indication information, the PMI information does not include the non-zero coefficient position indication information. In response to the use of non-zero coefficient position indication information in the first information to implicitly indicate the target NZP CSI-RS indication information, the PMI information may include the non-zero coefficient position indication information.

[0088] In some embodiments, the PMI information may include phase coefficient information.

[0089] In some embodiments, the PMI information may include amplitude coefficient information.

[0090] The present disclosure provides a variety of different information included in the second information of CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0091] In the channel state information feedback method provided by the embodiment of the present disclosure, the second information includes PMI information corresponding to the target NZP CSI-RS.

[0092] In some embodiments, the second information may include PMI information corresponding to the target NZP CSI-RS. Of course, the second information may also include or not include PMI information corresponding to non-target NZP CSI-RS.

[0093] In some embodiments, in response to the second information including the PMI information corresponding to the non-target NZP CSI-RS, the PMI information corresponding to the non-target NZP CSI-RS may be a default value, such as 0 or any other equivalent value, and the specific default value is not limited in this disclosure.

[0094] The present disclosure includes the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, and thus feeds back the parameter information corresponding to at least one NZP CSI-RS measured based on the channel measurement resource through the CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0095] In the channel state information feedback method provided by the embodiment of the present disclosure, the second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS.

[0096] In some embodiments, the second information includes only the PMI information corresponding to the target NZP CSI-RS, and does not include the PMI information corresponding to NZP CSI-RS other than the target NZP CSI-RS, that is, does not include the PMI information corresponding to the non-target NZP CSI-RS.

[0097] In some embodiments, the second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS, and may not include SD basis parameter information, FD basis parameter information, phase coefficient information, and amplitude coefficient information.

[0098] The present disclosure reduces the size of the CSI by including only the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, but not including the PMI information corresponding to the non-target NZP CSI-RS. This reduces the signaling overhead of CSI reporting when the terminal communicates with multiple TRPs.

[0099] In the channel state information feedback method provided by the embodiment of the present disclosure, the spatial basis vector parameter information may include at least one of the following: oversampling information; beam selection information.

[0100] In some embodiments, the SD basis parameter information may include oversampling information.

[0101] For example, the oversampling information may correspond to O1 information and O2 information, wherein the O1 information is the oversampling factor of the first dimension and the O2 information is the oversampling factor of the second dimension.

[0102] In some embodiments, the SD basis parameter information may include beam selection information.

[0103] For example, the beam selection information corresponds to L beams selected from N1 and N2, where N1 is the number of antenna ports in the first dimension of the NZP CSI-RS and N2 is the number of antenna ports in the second dimension of the NZP CSI-RS.

[0104] The present disclosure provides a variety of information including spatial basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0105] In the channel state information feedback method provided by the embodiment of the present disclosure, the frequency domain basis vector includes determining M frequency domain units from multiple frequency domain units for each data layer, where M is a positive integer.

[0106] In some embodiments, the FD basis parameter information may be for each data layer.

[0107] In some embodiments, the FD basis parameter information may select M frequency domain units from N3 frequency domain units, where M is a positive integer. N3 is the number of CQI subbands multiplied by an R value. The R value represents the number of PMI subbands corresponding to a CQI subband.

[0108] The present disclosure provides a variety of information including frequency domain basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0109] In the channel state information feedback method provided by the embodiment of the present disclosure, the phase coefficient information may include at least one of the following: broadband phase coefficient information; narrowband phase coefficient information; and phase coefficient information corresponding to the NZP CSI-RS.

[0110] In some embodiments, the phase coefficient information may include broadband phase coefficient information.

[0111] In some embodiments, the phase coefficient information may include narrowband phase coefficient information.

[0112] In some embodiments, the phase coefficient information may include phase coefficient information corresponding to the NZP CSI-RS.

[0113] It is understandable that the phase coefficient information corresponding to the non-target NZP CSI-RS may not be indicated, or may be a default value, such as 0.

[0114] The present disclosure provides a variety of information including phase coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0115] In the channel state information feedback method provided by the embodiment of the present disclosure, the amplitude coefficient information may include at least one of the following: broadband amplitude coefficient information; narrowband amplitude coefficient information; and amplitude coefficient information corresponding to the NZP CSI-RS.

[0116] In some embodiments, the amplitude coefficient information may include broadband amplitude coefficient information.

[0117] In some embodiments, the amplitude coefficient information may include narrowband amplitude coefficient information.

[0118] In some embodiments, the amplitude coefficient information may include amplitude coefficient information corresponding to the NZP CSI-RS.

[0119] It is understandable that the amplitude coefficient information corresponding to the non-target NZP CSI-RS may not be indicated, or may be a default value, such as 0.

[0120] The present disclosure provides a variety of information including amplitude coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0121] Based on the same concept, the present disclosure also provides a channel state information feedback method executed by a network device side.

[0122] Figure 3 is a flow chart of another channel state information feedback method according to an exemplary embodiment. Figure 3 As shown, the method is applied to a network device and may include the following steps:

[0123] In step S11, configuration information is sent to the terminal.

[0124] In some embodiments, a network device sends configuration information to a terminal. The configuration information may be used by the terminal to determine at least one CMR, wherein a target CMR in the at least one CMR includes multiple NZP CSI-RSs.

[0125] In some embodiments, the network device may send configuration information by means of RRC signaling and / or MAC CE.

[0126] In step S12, channel state information CSI sent by the terminal is received.

[0127] In some embodiments, the network device may receive CSI sent by the terminal, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0128] It can be understood that the terminal can perform measurement based on at least one NZP CSI-RS among the multiple NZP CSI-RSs included in the target CMR to obtain CSI.

[0129] In some embodiments, CSI may also be referred to as a CSI report.

[0130] The present disclosure feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0131] In the channel state information feedback method provided in the embodiments of the present disclosure, the CSI includes: first information and second information. The first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR. The first information includes target NZP CSI-RS indication information. The target NZP CSI-RS indication information is used to indicate whether the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS, and the target NZP CSI-RS is part or all of a plurality of NZP CSI-RSs.

[0132] In some embodiments, the CSI received by the network device may include first information and second information. For example, the CSI report may include two parts, namely, part 1 and part 2. Part 1 may correspond to the first information, and part 2 may correspond to the second information. The first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR. It is understood that the first information and the second information are both used to describe the indication information of the NZP CSI-RS in the target CMR, but the first information and the second information are different indication information.

[0133] In some embodiments, the first information may include target NZP CSI-RS indication information. The target NZP CSI-RS indication information may be used to indicate whether the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS. The target NZP CSI-RS may be part or all of the multiple NZP CSI-RSs.

[0134] It can be understood that the target NZP CSI-RS is the NZP CSI-RS whose channel quality is determined to meet the requirements after the terminal performs channel measurement. In other words, the terminal considers that the channel quality of such NZP CSI-RS is good and can communicate with the TRP corresponding to such NZP CSI-RS. Non-target NZP CSI-RS, on the other hand, are NZP CSI-RS whose channel quality does not meet the requirements. It can be considered that the channel quality of such NZP CSI-RS is poor, which is not conducive to terminal communication.

[0135] The present disclosure uses CSI to feedback parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0136] In the channel state information feedback method provided by the embodiment of the present disclosure, the size of the indication field corresponding to the second information is determined based on the first information.

[0137] In some embodiments, the size of the indication field corresponding to the second information may be determined based on the first information.

[0138] For example, the size of CSI Part 2 is determined based on the information in Part 1. The size of Part 2 indicates the number of bits occupied by CSI Part 2, such as 8 bits or 16 bits.

[0139] In some embodiments, the size of the indication field corresponding to the first information may be a fixed value, such as a pre-set value or a default size specified by a protocol.

[0140] The present disclosure dynamically adjusts the sizes of different parts of the CSI, which is conducive to feedback of parameter information corresponding to at least one NZP CSI-RS, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0141] In the channel state information feedback method provided by the embodiment of the present disclosure, the first information also includes at least one of the following: channel state information reference signal resource indication CRI information; broadband channel quality information CQI; the number of non-zero broadband amplitude coefficients; non-zero coefficient number indication information; non-zero coefficient position indication information; mode indication; rank indication information.

[0142] In some embodiments, the first information may include CRI information.

[0143] In some embodiments, the first information may include a wideband CQI.

[0144] In some embodiments, the first information may include the number of non-zero wideband amplitude coefficients.

[0145] It can be understood that the number of non-zero broadband amplitude coefficients refers to the number of broadband amplitude coefficients with non-zero values.

[0146] In some embodiments, the first information may include non-zero coefficient number indication information.

[0147] It can be understood that the non-zero coefficient number indication information can indicate the number of coefficients whose coherent coefficients are non-zero.

[0148] In some embodiments, the first information may include non-zero coefficient position indication information.

[0149] It can be understood that the non-zero coefficient position indication information can indicate the position of the coefficient whose coherence coefficient is non-zero.

[0150] In some embodiments, the first information may include a mode indication.

[0151] For example, the mode indication can be used to indicate the CSI feedback mode, codebook mode, etc. The CSI feedback mode may include mode 1 and mode 2, where mode 1 is feedback based on a single TRP and mode 2 is feedback based on multiple TRPs. Of course, the CSI feedback mode may also include other modes, which is not limited in the present disclosure. The codebook mode may include codebook structure 1 and codebook structure 2, where codebook structure 1 feeds back a frequency domain basis vector (FD basis) information for all NZP CSI-RSs; and codebook structure 2 feeds back a frequency domain basis vector information for each NZP CSI-RS. The codebook mode may also include other modes, which is not limited in the present disclosure.

[0152] In some embodiments, the first information may include rank indication information.

[0153] The present disclosure provides a variety of different first information included in CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0154] In the channel state information feedback method provided by the embodiment of the present disclosure, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N bits correspond one-to-one to the N NZP CSI-RSs; in response to the value of the bit being a specified value, it indicates that the NZP CSI-RS corresponding to the bit is the target NZP CSI-RS.

[0155] In some embodiments, the target NZP CSI-RS indication information in the first information may include N bits. Where N is a positive integer. N represents the number of NZP CSI-RSs included in the target CMR. The N bits in the target NZP CSI-RS indication information correspond one-to-one to the N NZP CSI-RSs included in the target CMR. That is, each bit can be used to describe whether the corresponding NZP CSI-RS is the target NZP CSI-RS. When a bit is a specified value, the NZP CSI-RS corresponding to the bit can be considered to be the target NZP CSI-RS.

[0156] For example, the designated value of a bit may be “0” or “1.” Of course, the designated value may also be any other numerical value or symbol, which is not limited in the present disclosure.

[0157] It can be understood that the TRP corresponding to the determined target NZP CSI-RS is the TRP selected by the terminal for subsequent communication.

[0158] The present disclosure indicates the target NZP CSI-RS among multiple NZP CSI-RSs through the bit in the target NZP CSI-RS indication information, and uses CSI feedback to provide parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0159] In the channel state information feedback method provided in the embodiments of the present disclosure, target NZP CSI-RS indication information is indicated by N non-zero coefficient number indication information, where N is the number of NZP CSI-RSs included in the target CMR, and the N non-zero coefficient number indication information corresponds one-to-one to the N NZP CSI-RSs. In response to the non-zero coefficient number indication information being a specified value, the NZP CSI-RS corresponding to the non-zero coefficient number indication information is the target NZP CSI-RS.

[0160] In some embodiments, the target NZP CSI-RS indication information in the first information can be implicitly indicated by N non-zero coefficient number indication information. Wherein, N is a positive integer. N represents the number of NZP CSI-RSs included in the target CMR. The N non-zero coefficient number indication information in the target NZP CSI-RS indication information corresponds one-to-one to the N NZP CSI-RSs included in the target CMR. In other words, each non-zero coefficient number indication information can be used to describe whether the corresponding NZP CSI-RS is the target NZP CSI-RS. When the non-zero coefficient number indication information is a specified value, the NZP CSI-RS corresponding to the non-zero coefficient number indication information can be considered to be the target NZP CSI-RS.

[0161] For example, the designated value of the non-zero coefficient number indication information may be that the number indicated by the non-zero coefficient number indication information is greater than 0. This indicates that the NZP CSI-RS corresponding to the non-zero coefficient number indication information is the target NZP CSI-RS. Of course, any equivalent method may be used to determine the designated value of the non-zero coefficient number indication information, and this disclosure is not limited thereto.

[0162] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient number indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0163] In the channel state information feedback method provided in the embodiments of the present disclosure, target NZP CSI-RS indication information is indicated by N non-zero coefficient position indication information, where N is the number of NZP CSI-RSs included in the target CMR, and the N non-zero coefficient position indication information corresponds one-to-one to the N NZP CSI-RSs. In response to the non-zero coefficient position indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is the target NZP CSI-RS.

[0164] In some embodiments, the target NZP CSI-RS indication information in the first information can be implicitly indicated by N non-zero coefficient position indication information. Wherein, N is a positive integer. N represents the number of NZP CSI-RSs included in the target CMR. The N non-zero coefficient position indication information in the target NZP CSI-RS indication information corresponds one-to-one to the N NZP CSI-RSs included in the target CMR. That is, each non-zero coefficient position indication information can be used to describe whether the corresponding NZP CSI-RS is the target NZP CSI-RS. When the non-zero coefficient position indication information is a specified value, the NZP CSI-RS corresponding to the non-zero coefficient number indication information can be considered to be the target NZP CSI-RS.

[0165] For example, the non-zero coefficient position indication information may be a specified value, indicating that at least one position has a non-zero coherent coefficient. This indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is the target NZP CSI-RS. Of course, any equivalent method may be used to determine the specified value of the non-zero coefficient position indication information, and this disclosure is not limited thereto.

[0166] In some embodiments, the non-zero coefficient position indication information can be implemented through a non-zero coefficient bitmap. For example, the non-zero coefficient bitmap corresponding to the NZP CSI-RS can indicate that the coherence coefficient of the NZP CSI-RS is indicated as a specified value or 0. In response to the coherence coefficient indication being a specified value, it means that the coherence coefficient at that position is a non-zero coefficient; in response to the coherence coefficient indication being 0, it means that the coherence coefficient at that position is 0. It can be understood that the bitmap of the non-target NZP CSI-RS indicates that the coherence coefficients of the NZP CSI-RS are all 0. Only when the bitmap indicates the presence of a non-zero coefficient is the corresponding NZP CSI-RS considered to be the target NZP CSI-RS.

[0167] It can be understood that for the target NZP CSI-RS, there is at least one non-zero coefficient in its coherence coefficients, that is, a non-zero coefficient, while the coherence coefficients corresponding to the non-target NZP CSI-RS are all 0.

[0168] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient position indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0169] In the channel state information feedback method provided by the embodiment of the present disclosure, the second information includes PMI information, and the PMI information may include at least one of the following: spatial basis vector parameter information; frequency domain basis vector parameter information; non-zero coefficient position indication information; phase coefficient information; amplitude coefficient information.

[0170] In some embodiments, the second information may include PMI information. The PMI information may be used to describe the precoding matrix used by the NZP CSI-RS in the target CMR for downlink MIMO spatial multiplexing.

[0171] In some embodiments, the PMI information may include SD basis parameter information.

[0172] In some embodiments, the PMI information may include FD basis parameter information.

[0173] In some embodiments, the PMI information may include non-zero coefficient position indication information.

[0174] It can be understood that, in response to the use of non-zero coefficient position indication information in the first information to implicitly indicate the target NZP CSI-RS indication information, the PMI information does not include the non-zero coefficient position indication information. In response to the use of non-zero coefficient position indication information in the first information to implicitly indicate the target NZP CSI-RS indication information, the PMI information may include the non-zero coefficient position indication information.

[0175] In some embodiments, the PMI information may include phase coefficient information.

[0176] In some embodiments, the PMI information may include amplitude coefficient information.

[0177] The present disclosure provides a variety of different information included in the second information of CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0178] In the channel state information feedback method provided by the embodiment of the present disclosure, the second information includes PMI information corresponding to the target NZP CSI-RS.

[0179] In some embodiments, the second information may include PMI information corresponding to the target NZP CSI-RS. Of course, the second information may also include or not include PMI information corresponding to non-target NZP CSI-RS.

[0180] In some embodiments, in response to the second information including the PMI information corresponding to the non-target NZP CSI-RS, the PMI information corresponding to the non-target NZP CSI-RS may be a default value, such as 0 or any other equivalent value, and the specific default value is not limited in this disclosure.

[0181] The present disclosure includes the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, and thus feeds back the parameter information corresponding to at least one NZP CSI-RS measured based on the channel measurement resource through the CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0182] In the channel state information feedback method provided by the embodiment of the present disclosure, the second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS.

[0183] In some embodiments, the second information includes only the PMI information corresponding to the target NZP CSI-RS, and does not include the PMI information corresponding to NZP CSI-RS other than the target NZP CSI-RS, that is, does not include the PMI information corresponding to the non-target NZP CSI-RS.

[0184] In some embodiments, the second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS, and may not include SD basis parameter information, FD basis parameter information, phase coefficient information, and amplitude coefficient information.

[0185] The present disclosure reduces the size of the CSI by including only the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, but not including the PMI information corresponding to the non-target NZP CSI-RS. This reduces the signaling overhead of CSI reporting when the terminal communicates with multiple TRPs.

[0186] In the channel state information feedback method provided by the embodiment of the present disclosure, the spatial basis vector parameter information may include at least one of the following: oversampling information; beam selection information.

[0187] In some embodiments, the SD basis parameter information may include oversampling information.

[0188] For example, the oversampling information may correspond to O1 information and O2 information, wherein the O1 information is the oversampling factor of the first dimension and the O2 information is the oversampling factor of the second dimension.

[0189] In some embodiments, the SD basis parameter information may include beam selection information.

[0190] For example, the beam selection information corresponds to L beams selected from N1 and N2, where N1 is the number of antenna ports in the first dimension of the NZP CSI-RS and N2 is the number of antenna ports in the second dimension of the NZP CSI-RS.

[0191] The present disclosure provides a variety of information including spatial basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0192] In the channel state information feedback method provided by the embodiment of the present disclosure, the frequency domain basis vector includes determining M frequency domain units from multiple frequency domain units for each data layer, where M is a positive integer.

[0193] In some embodiments, the FD basis parameter information may be for each layer.

[0194] In some embodiments, the FD basis parameter information may select M frequency domain units from N3 frequency domain units, where M is a positive integer. N3 is the number of CQI subbands multiplied by an R value. The R value represents the number of PMI subbands corresponding to a CQI subband.

[0195] The present disclosure provides a variety of information including frequency domain basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0196] In the channel state information feedback method provided by the embodiment of the present disclosure, the phase coefficient information may include at least one of the following: broadband phase coefficient information; narrowband phase coefficient information; and phase coefficient information corresponding to the NZP CSI-RS.

[0197] In some embodiments, the phase coefficient information may include broadband phase coefficient information.

[0198] In some embodiments, the phase coefficient information may include narrowband phase coefficient information.

[0199] In some embodiments, the phase coefficient information may include phase coefficient information corresponding to the NZP CSI-RS.

[0200] It is understandable that the phase coefficient information corresponding to the non-target NZP CSI-RS may not be indicated, or may be a default value, such as 0.

[0201] The present disclosure provides a variety of information including phase coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0202] In the channel state information feedback method provided by the embodiment of the present disclosure, the amplitude coefficient information may include at least one of the following: broadband amplitude coefficient information; narrowband amplitude coefficient information; and amplitude coefficient information corresponding to the NZP CSI-RS.

[0203] In some embodiments, the amplitude coefficient information may include broadband amplitude coefficient information.

[0204] In some embodiments, the amplitude coefficient information may include narrowband amplitude coefficient information.

[0205] In some embodiments, the amplitude coefficient information may include amplitude coefficient information corresponding to the NZP CSI-RS.

[0206] It is understandable that the amplitude coefficient information corresponding to the non-target NZP CSI-RS may not be indicated, or may be a default value, such as 0.

[0207] The present disclosure provides a variety of information including amplitude coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0208] I understand. Figure 3 For the detailed implementation of the network side embodiments described, please refer to Figure 2 The description of the corresponding embodiments on the terminal side is not repeated in this disclosure.

[0209] It should be noted that those skilled in the art will appreciate that the various implementation methods / embodiments involved in the embodiments of the present disclosure can be used in conjunction with the aforementioned embodiments or can be used independently. Whether used alone or in conjunction with the aforementioned embodiments, the implementation principles are similar. In the implementation of the present disclosure, some embodiments are described in terms of implementation methods used together. Of course, those skilled in the art will appreciate that such examples are not limitations on the embodiments of the present disclosure.

[0210] Based on the same concept, the embodiments of the present disclosure also provide a channel state information feedback device and apparatus.

[0211] It is understandable that the channel state information feedback apparatus and device provided by the embodiments of the present disclosure include hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of the various examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0212] Figure 4 FIG. 1 is a schematic diagram of a channel state information feedback device according to an exemplary embodiment. Figure 4 The device 200 is configured in a terminal and includes: a receiving module 201, used to receive configuration information sent by a network device; a determining module 202, used to determine at least one channel measurement resource CMR based on the configuration information, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals NZP CSI-RS; a sending module 203, used to send channel state information CSI to the network device, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0213] The present disclosure feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0214] In some embodiments, the CSI includes: first information and second information, wherein the first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR; the first information includes target NZP CSI-RS indication information, and the target NZP CSI-RS indication information is used to indicate that the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS, and the target NZP CSI-RS is part or all of the NZP CSI-RSs among multiple NZP CSI-RSs.

[0215] The present disclosure uses CSI to feedback parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0216] In some implementations, the size of the second information corresponding indication field is determined based on the first information.

[0217] The present disclosure dynamically adjusts the sizes of different parts of the CSI, which is conducive to feedback of parameter information corresponding to at least one NZP CSI-RS, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0218] In some embodiments, the first information also includes at least one of the following: channel state information reference signal resource indication CRI information; broadband channel quality information CQI; number of non-zero broadband amplitude coefficients; non-zero coefficient number indication information; non-zero coefficient position indication information; mode indication; rank indication information.

[0219] The present disclosure provides a variety of different first information included in CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0220] In some embodiments, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, and the N bits correspond one-to-one to the N NZP CSI-RSs; in response to the value of the bit being a specified value, it indicates that the NZP CSI-RS corresponding to the bit is the target NZP CSI-RS.

[0221] The present disclosure indicates the target NZP CSI-RS among multiple NZP CSI-RSs through the bit in the target NZP CSI-RS indication information, and uses CSI feedback to provide parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0222] In some embodiments, the target NZP CSI-RS indication information is indicated by N non-zero coefficient number indication information, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N non-zero coefficient number indication information corresponds one-to-one to the N NZP CSI-RSs; in response to the non-zero coefficient number indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient number indication information is the target NZP CSI-RS.

[0223] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient number indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0224] In some embodiments, the target NZP CSI-RS indication information is indicated by N non-zero coefficient position indication information, where N is the number of NZP CSI-RS included in the target CMR, wherein the N non-zero coefficient position indication information corresponds one-to-one to the N NZP CSI-RS; in response to the non-zero coefficient position indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is the target NZP CSI-RS.

[0225] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient position indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0226] In some embodiments, the second information includes precoding matrix indication PMI information, and the PMI information includes at least one of the following: spatial basis vector parameter information; frequency domain basis vector parameter information; non-zero coefficient position indication information; phase coefficient information; amplitude coefficient information.

[0227] The present disclosure provides a variety of different information included in the second information of CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0228] In some implementations, the second information includes PMI information corresponding to the target NZP CSI-RS.

[0229] The present disclosure includes the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, and thus feeds back the parameter information corresponding to at least one NZP CSI-RS measured based on the channel measurement resource through the CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0230] In some implementations, the second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS.

[0231] The present disclosure reduces the size of the CSI by including only the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, but not including the PMI information corresponding to the non-target NZP CSI-RS. This reduces the signaling overhead of CSI reporting when the terminal communicates with multiple TRPs.

[0232] In some embodiments, the spatial basis vector parameter information includes at least one of the following: oversampling information; and beam selection information.

[0233] The present disclosure provides a variety of information including spatial basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0234] In some embodiments, the frequency domain basis vectors include determining, for each data layer, M frequency domain units from a plurality of frequency domain units, where M is a positive integer.

[0235] The present disclosure provides a variety of information including frequency domain basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0236] In some implementations, the phase coefficient information includes at least one of the following: wideband phase coefficient information; narrowband phase coefficient information; and phase coefficient information corresponding to the NZP CSI-RS.

[0237] The present disclosure provides a variety of information including phase coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0238] In some implementations, the amplitude coefficient information includes at least one of the following: wideband amplitude coefficient information; narrowband amplitude coefficient information; and amplitude coefficient information corresponding to the NZP CSI-RS.

[0239] The present disclosure provides a variety of information including amplitude coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0240] Figure 5 FIG. 1 is a schematic diagram of another channel state information feedback device according to an exemplary embodiment. Figure 5The apparatus 300 is configured in a network device and includes: a sending module 301, configured to send configuration information to a terminal, where the configuration information is used by the terminal to determine at least one channel measurement resource CMR, wherein a target CMR in the at least one CMR includes multiple non-zero power channel state information reference signals NZP CSI-RS; a receiving module 302, configured to receive channel state information CSI sent by the terminal, where the CSI is obtained by the terminal through channel measurement based on the target CMR.

[0241] The present disclosure feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources in the channel state information sent to the network device, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0242] In some embodiments, the CSI includes: first information and second information, wherein the first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR; the first information includes target NZP CSI-RS indication information, and the target NZP CSI-RS indication information is used to indicate that the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS, and the target NZP CSI-RS is part or all of the NZP CSI-RSs among multiple NZP CSI-RSs.

[0243] The present disclosure uses CSI to feedback parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0244] In some implementations, the size of the second information corresponding indication field is determined based on the first information.

[0245] The present disclosure dynamically adjusts the sizes of different parts of the CSI, which is conducive to feedback of parameter information corresponding to at least one NZP CSI-RS, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0246] In some embodiments, the first information also includes at least one of the following: channel state information reference signal resource indication CRI information; broadband channel quality information CQI; number of non-zero broadband amplitude coefficients; non-zero coefficient number indication information; non-zero coefficient position indication information; mode indication; rank indication information.

[0247] The present disclosure provides a variety of different first information included in CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0248] In some embodiments, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, and the N bits correspond one-to-one to the N NZP CSI-RSs; in response to the value of the bit being a specified value, it indicates that the NZP CSI-RS corresponding to the bit is the target NZP CSI-RS.

[0249] The present disclosure indicates the target NZP CSI-RS among multiple NZP CSI-RSs through the bit in the target NZP CSI-RS indication information, and uses CSI feedback to provide parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0250] In some embodiments, the target NZP CSI-RS indication information is indicated by N non-zero coefficient number indication information, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N non-zero coefficient number indication information corresponds one-to-one to the N NZP CSI-RSs; in response to the non-zero coefficient number indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient number indication information is the target NZP CSI-RS.

[0251] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient number indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0252] In some embodiments, the target NZP CSI-RS indication information is indicated by N non-zero coefficient position indication information, where N is the number of NZP CSI-RS included in the target CMR, wherein the N non-zero coefficient position indication information corresponds one-to-one to the N NZP CSI-RS; in response to the non-zero coefficient position indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is the target NZP CSI-RS.

[0253] The present disclosure can indicate a target NZP CSI-RS among multiple NZP CSI-RSs through the non-zero coefficient position indication information in the target NZP CSI-RS indication information. By feeding back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, the signaling overhead of CSI reporting can be reduced when the terminal communicates with multiple TRPs.

[0254] In some embodiments, the second information includes precoding matrix indication PMI information, and the PMI information includes at least one of the following: spatial basis vector parameter information; frequency domain basis vector parameter information; non-zero coefficient position indication information; phase coefficient information; amplitude coefficient information.

[0255] The present disclosure provides a variety of different information included in the second information of CSI, and feeds back parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0256] In some implementations, the second information includes PMI information corresponding to the target NZP CSI-RS.

[0257] The present disclosure includes the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, and thus feeds back the parameter information corresponding to at least one NZP CSI-RS measured based on the channel measurement resource through the CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0258] In some implementations, the second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS.

[0259] The present disclosure reduces the size of the CSI by including only the PMI information corresponding to the target NZP CSI-RS in the second information of the CSI, but not including the PMI information corresponding to the non-target NZP CSI-RS. This reduces the signaling overhead of CSI reporting when the terminal communicates with multiple TRPs.

[0260] In some embodiments, the spatial basis vector parameter information includes at least one of the following: oversampling information; and beam selection information.

[0261] The present disclosure provides a variety of information including spatial basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0262] In some embodiments, the frequency domain basis vector parameter information includes, for each data layer, M frequency domain units determined from a plurality of frequency domain units, where M is a positive integer.

[0263] The present disclosure provides a variety of information including frequency domain basis vector parameter information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0264] In some implementations, the phase coefficient information includes at least one of the following: wideband phase coefficient information; narrowband phase coefficient information; and phase coefficient information corresponding to the NZP CSI-RS.

[0265] The present disclosure provides a variety of information including phase coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0266] In some implementations, the amplitude coefficient information includes at least one of the following: wideband amplitude coefficient information; narrowband amplitude coefficient information; and amplitude coefficient information corresponding to the NZP CSI-RS.

[0267] The present disclosure provides a variety of information including amplitude coefficient information, and feedbacks parameter information corresponding to at least one NZP CSI-RS measured based on channel measurement resources through CSI, so that when the terminal communicates with multiple TRPs, the signaling overhead of CSI reporting can be reduced.

[0268] Regarding the apparatus 200 and the apparatus 300 in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated on here.

[0269] Figure 6 FIG4 is a schematic diagram of a channel state information feedback device according to an exemplary embodiment. For example, device 400 may be any terminal such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

[0270] Reference Figure 6 , device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0271] Processing component 402 generally controls the overall operation of device 400, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the above-described method. In addition, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0272] The memory 404 is configured to store various types of data to support operations on the device 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0273] The power component 406 provides power to the various components of the device 400. The power component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 400.

[0274] The multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera and / or a rear camera. When the device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0275] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC) that is configured to receive external audio signals when the device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0276] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0277] The sensor assembly 414 includes one or more sensors for providing various aspects of the status assessment of the device 400. For example, the sensor assembly 414 can detect the open / closed state of the device 400, the relative positioning of components, such as the display and keypad of the device 400. The sensor assembly 414 can also detect changes in the position of the device 400 or a component of the device 400, the presence or absence of user contact with the device 400, the orientation or acceleration / deceleration of the device 400, and temperature changes of the device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0278] The communication component 416 is configured to facilitate wired or wireless communication between the device 400 and other devices. The device 400 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0279] In an exemplary embodiment, the device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described methods.

[0280] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, which can be executed by the processor 420 of the device 400 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0281] Figure 7 FIG. 5 is a schematic diagram of another channel state information feedback device according to an exemplary embodiment. For example, the device 500 may be provided as a base station or a server. Figure 7The device 500 includes a processing component 522, which further includes one or more processors, and a memory resource represented by a memory 532 for storing instructions, such as applications, that can be executed by the processing component 522. The application stored in the memory 532 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 522 is configured to execute the instructions to perform the above-described method.

[0282] The device 500 may also include a power supply component 526 configured to perform power management of the device 500, a wired or wireless network interface 550 configured to connect the device 500 to a network, and an input / output (I / O) interface 558. The device 500 may operate based on an operating system stored in the memory 532, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

[0283] In one embodiment, for example Figure 1 As shown, the present disclosure also provides a communication system, which includes a terminal and a network device. The terminal is used to perform Figure 2 Any channel state information feedback method described in; the network device is used to perform Figure 3 Any channel state information feedback method described in .

[0284] In the present disclosure, when a terminal serves multiple TRPs or multiple remote radio heads (RRHs), the above-mentioned CSI reporting method is used to improve the transmission performance based on multiple TRPs while reducing the signaling overhead of CSI reporting.

[0285] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0286] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0287] It is further understood that the meanings of words such as "in response to" and "if" involved in this disclosure depend on the context and the actual usage scenarios. For example, the word "in response to" used herein can be interpreted as "at..." or "when..." or "if" or "if".

[0288] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0289] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0290] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A channel state information feedback method, characterized in that: The method is applied to a terminal and includes: receiving configuration information sent by a network device, and determining at least one channel measurement resource (CMR) based on the configuration information, wherein a target CMR in the at least one CMR includes a plurality of non-zero power channel state information reference signals (NZP CSI-RS); Sending channel state information CSI to the network device, where the CSI is obtained by the terminal performing channel measurement based on the target CMR; The CSI includes first information, the first information includes target NZP CSI-RS indication information, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N bits correspond one-to-one to the N NZP CSI-RSs.

2. The method according to claim 1, wherein The CSI further includes: second information, wherein the first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR; The target NZP CSI-RS indication information is used to indicate that the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS, and the target NZP CSI-RS is part or all of the multiple NZP CSI-RSs.

3. The method according to claim 2, characterized in that The size of the indication field corresponding to the second information is determined based on the first information.

4. The method according to claim 2 or 3, characterized in that The first information also includes at least one of the following: Channel state information reference signal resource indication CRI information; Wideband channel quality information CQI; The number of non-zero broadband amplitude coefficients; Non-zero coefficient number indication information; Non-zero coefficient position indication information; Mode indication; Rank indication information.

5. The method according to any one of claims 2 to 3, wherein: In response to the value of the bit being a specified value, it indicates that the NZP CSI-RS corresponding to the bit is the target NZP CSI-RS.

6. The method according to any one of claims 2 to 3, wherein: The target NZP CSI-RS indication information is indicated by N non-zero coefficient number indication information, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N non-zero coefficient number indication information corresponds one-to-one to the N NZP CSI-RSs; In response to the non-zero coefficient number indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient number indication information is a target NZP CSI-RS.

7. The method according to any one of claims 2 to 3, wherein: The target NZP CSI-RS indication information is indicated by N non-zero coefficient position indication information, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N non-zero coefficient position indication information corresponds one-to-one to the N NZP CSI-RSs; In response to the non-zero coefficient position indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is a target NZP CSI-RS.

8. The method according to any one of claims 2 to 3, characterized in that: The second information includes precoding matrix indicator PMI information, where the PMI information includes at least one of the following: Spatial basis vector parameter information; Frequency domain basis vector parameter information; Non-zero coefficient position indication information; Phase coefficient information; Amplitude coefficient information.

9. The method according to claim 8, wherein The second information includes PMI information corresponding to the target NZP CSI-RS.

10. The method according to claim 9, wherein The second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS.

11. The method according to claim 8, characterized in that The spatial basis vector parameter information includes at least one of the following: Oversampling information; Beam selection information.

12. The method according to claim 8, wherein The frequency domain basis vectors include determining M frequency domain units from a plurality of frequency domain units for each data layer, where M is a positive integer.

13. The method according to claim 8, characterized in that The phase coefficient information includes at least one of the following: Wideband phase coefficient information; Narrowband phase coefficient information; Phase coefficient information corresponding to NZP CSI-RS.

14. The method according to claim 8, characterized in that The amplitude coefficient information includes at least one of the following: Wideband amplitude coefficient information; Narrowband amplitude coefficient information; Amplitude coefficient information corresponding to NZP CSI-RS.

15. A channel state information feedback method, characterized in that: The method is applied to a network device and includes: Sending configuration information to a terminal, where the configuration information is used by the terminal to determine at least one channel measurement resource (CMR), wherein a target CMR in the at least one CMR includes a plurality of non-zero power channel state information reference signals (NZP CSI-RS); receiving channel state information CSI sent by the terminal, where the CSI is obtained by the terminal through channel measurement based on the target CMR; The CSI includes first information, the first information includes target NZP CSI-RS indication information, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N bits correspond one-to-one to the N NZP CSI-RSs.

16. The method according to claim 15, wherein The CSI further includes: second information, wherein the first information and the second information are different indication information corresponding to the NZP CSI-RS in the target CMR; The target NZP CSI-RS indication information is used to indicate that the NZP CSI-RS is a target NZP CSI-RS or a non-target NZP CSI-RS, and the target NZP CSI-RS is part or all of the multiple NZP CSI-RSs.

17. The method according to claim 16, characterized in that The size of the indication field corresponding to the second information is determined based on the first information.

18. The method according to claim 16 or 17, characterized in that The first information also includes at least one of the following: Channel state information reference signal resource indication CRI information; Wideband channel quality information CQI; The number of non-zero broadband amplitude coefficients; Non-zero coefficient number indication information; Non-zero coefficient position indication information; Mode indication; Rank indication information.

19. The method according to any one of claims 16 to 17, wherein: In response to the value of the bit being a specified value, it indicates that the NZP CSI-RS corresponding to the bit is the target NZP CSI-RS.

20. The method according to any one of claims 16 to 17, wherein: The target NZP CSI-RS indication information is indicated by N non-zero coefficient number indication information, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N non-zero coefficient number indication information corresponds one-to-one to the N NZP CSI-RSs; In response to the non-zero coefficient number indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient number indication information is a target NZP CSI-RS.

21. The method according to any one of claims 16 to 17, wherein: The target NZP CSI-RS indication information is indicated by N non-zero coefficient position indication information, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N non-zero coefficient position indication information corresponds one-to-one to the N NZP CSI-RSs; In response to the non-zero coefficient position indication information being a specified value, it indicates that the NZP CSI-RS corresponding to the non-zero coefficient position indication information is a target NZP CSI-RS.

22. The method according to any one of claims 16-17, characterized in that The second information includes precoding matrix indicator PMI information, where the PMI information includes at least one of the following: Spatial basis vector parameter information; Frequency domain basis vector parameter information; Non-zero coefficient position indication information; Phase coefficient information; Amplitude coefficient information.

23. The method according to claim 22, wherein The second information includes PMI information corresponding to the target NZP CSI-RS.

24. The method according to claim 23, wherein The second information does not include PMI information corresponding to NZP CSI-RSs other than the target NZP CSI-RS.

25. The method according to claim 22, wherein The spatial basis vector parameter information includes at least one of the following: Oversampling information; Beam selection information.

26. The method according to claim 22, wherein The frequency domain basis vector parameter information includes, for each data layer, M frequency domain units determined from a plurality of frequency domain units, where M is a positive integer.

27. The method according to claim 22, wherein The phase coefficient information includes at least one of the following: Wideband phase coefficient information; Narrowband phase coefficient information; Phase coefficient information corresponding to NZP CSI-RS.

28. The method according to claim 22, wherein The amplitude coefficient information includes at least one of the following: Wideband amplitude coefficient information; Narrowband amplitude coefficient information; Amplitude coefficient information corresponding to NZP CSI-RS.

29. A channel state information feedback device, characterized in that: The device is configured at a terminal and includes: A receiving module, used for receiving configuration information sent by a network device; a determining module, configured to determine at least one channel measurement resource CMR based on the configuration information, wherein a target CMR in the at least one CMR includes a plurality of non-zero power channel state information reference signals NZP CSI-RS; a sending module, configured to send channel state information CSI to the network device, where the CSI is obtained by the terminal through channel measurement based on the target CMR; The CSI includes first information, the first information includes target NZP CSI-RS indication information, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N bits correspond one-to-one to the N NZP CSI-RSs.

30. A channel state information feedback device, characterized in that: The device is configured on a network device and includes: a sending module, configured to send configuration information to a terminal, where the configuration information is used by the terminal to determine at least one channel measurement resource CMR, wherein a target CMR in the at least one CMR includes a plurality of non-zero power channel state information reference signals NZP CSI-RS; a receiving module, configured to receive channel state information CSI sent by the terminal, where the CSI is obtained by the terminal through channel measurement based on the target CMR; The CSI includes first information, the first information includes target NZP CSI-RS indication information, the target NZP CSI-RS indication information includes N bits, where N is the number of NZP CSI-RSs included in the target CMR, wherein the N bits correspond one-to-one to the N NZP CSI-RSs.

31. A channel state information feedback device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute the method according to any one of claims 1 to 14.

32. A channel state information feedback device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute the method according to any one of claims 15 to 28.

33. A storage medium, characterized in that The storage medium stores instructions, and when the instructions in the storage medium are executed by a processor of the terminal, the terminal is enabled to execute the method according to any one of claims 1 to 14.

34. A storage medium, characterized in that The storage medium stores instructions, and when the instructions in the storage medium are executed by a processor of the network device, the network device is enabled to execute the method according to any one of claims 15 to 28.

35. A communication system comprising a terminal and a network device, wherein: The terminal is used to perform the method according to any one of claims 1 to 14; The network device is configured to execute the method according to any one of claims 15 to 28.

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