Channel state information (CSI) transmission method and apparatus, and communication device

Abstract

The present application belongs to the technical field of communications. Disclosed are a channel state information (CSI) transmission method and apparatus, and a communication device. The CSI transmission method on a terminal side in the embodiments of the present application comprises: a terminal sending a first CSI report to a network-side device, wherein the first CSI report comprises at least one piece of first target CSI information; each piece of first target CSI information is at least two pieces of first CSI information, second CSI information and third CSI information (201); the first CSI information is CSI information obtained by means of performing coherent joint transmission (CJT) on at least two CSI-RS resources; the second CSI information is CSI information obtained by means of performing non-coherent joint transmission (NCJT) on the at least two CSI-RS resources; and the third CSI information is CSI information obtained by means of one CSI-RS resource.

Description

Channel State Information (CSI) transmission method, device, and communication equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310958581.9 filed on July 31, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a method, apparatus, and communication device for reporting channel state information (CSI). Background Art

[0004] In actual scenarios, some transmission reception points (TRPs) can achieve good time-frequency synchronization, phase alignment, and real-time interactive coordination, allowing for coherent joint transmission (CJT). However, some TRPs cannot achieve precise synchronization, phase alignment, or real-time interactive coordination, and can only perform non-coherent joint transmission (NCJT).

[0005] In the related art, CSI reporting can only be applied to one of CJT and NCJT, and the CSI reporting of CJT can only be encoded and reported based on the enhancement of the second type (Type II) codebook, and the CSI reporting of NCJT can only be encoded and reported based on the enhancement of the first type (Type I) codebook.

[0006] In this way, when CJT is performed on part of the multi-TRP and NCJT is performed on the other part, the CSI report of CJT and the CSI report of NCJT need to be reported separately, which makes the CSI reporting process complicated and resource-intensive, and cannot accurately reflect the CSI in this mixed situation, limiting the flexibility of network transmission.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide a CSI transmission method, apparatus, and communication device, which can flexibly report at least two of the CSI of CJT, the CSI of NCJT, and the CSI of STRP based on the same CSI reporting framework.

[0009] In a first aspect, a CSI transmission method is provided, the method including:

[0010] The terminal sends a first CSI report to the network side device, where the first CSI report includes at least one first target CSI information;

[0011] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0012] In a second aspect, another CSI transmission method is provided, the method including:

[0013] A network-side device receives a first CSI report from a terminal, where the first CSI report includes at least one first target CSI information;

[0014] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0015] In a third aspect, a CSI transmission device is provided, including:

[0016] A first sending module, configured to send a first CSI report to a network-side device, where the first CSI report includes at least one first target CSI information;

[0017] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0018] In a fourth aspect, another CSI transmission device is provided, including:

[0019] A first receiving module is configured to receive a first CSI report from a terminal, where the first CSI report includes at least one first target CSI information;

[0020] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0021] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0022] According to a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is configured to send a first CSI report to a network-side device, where the first CSI report includes at least one first target CSI information;

[0023] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0024] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0025] In an eighth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is configured to receive a first CSI report from a terminal, where the first CSI report includes at least one first target CSI information;

[0026] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; the third CSI information is the CSI information obtained by one CSI-RS resource.

[0027] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0028] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0029] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0030] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the CSI transmission method as described in the first aspect, or to implement the steps of the CSI transmission method as described in the second aspect.

[0031] In an embodiment of the present application, the terminal sends a first CSI report to a network-side device, and the first CSI report includes at least one first target CSI information; wherein each first target CSI information is at least two items of the first CSI information, the second CSI information, and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource. Based on the same CSI reporting framework, at least two items of the CJT CSI, NCJT CSI, and STRP CSI can be flexibly reported, thereby reducing the CSI reporting resources when reporting at least two items of the CJT CSI, NCJT CSI, and STRP CSI. In addition, in a mixed scenario where part of the multiple TRPs performs CJT and the other part performs NCJT, at least two of the CSI of CJT, NCJT and STRP can be reported through a mixed report of the first target CSI information, which can more accurately reflect the CSI in the mixed scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic structural diagram of a wireless communication system to which an embodiment of the present application can be applied;

[0033] FIG2 is a flowchart of a CSI transmission method according to an embodiment of the present application;

[0034] FIG3 is a schematic diagram of K CSI-RS resource groups configured in an embodiment of the present application and M CSI-RS resource groups of target CSI information;

[0035] FIG4 is a second flowchart of a CSI transmission method provided in an embodiment of the present application;

[0036] FIG5 is a schematic diagram of a structure of a CSI transmission device according to an embodiment of the present application;

[0037] FIG6 is a second structural diagram of a CSI transmission device provided in an embodiment of the present application;

[0038] FIG7 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0039] FIG8 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

[0040] FIG9 is a schematic structural diagram of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0042] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0043] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0044] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0045] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0046] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, location management function (LMF), mobility management entity (MME), access and mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application server discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home subscriber server (HSS), centralized network configuration (CNC), network repository function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), etc. Function, BSF), application function (Application Function, AF), etc. It should be noted that, in the embodiment of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited. It should be noted that, in the embodiment of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0047] In related technologies, 3GPP NR Rel-17 supports NCJT CSI reporting, and Rel-18 supports CJT CSI reporting.

[0048] 1. NCJT CSI Report

[0049] Rel-17 enhances the CSI Reference Signal (CSI-RS) configuration and CSI reporting of multiple TRPs / antenna panels. In order to measure the channels of two TRPs / panels, the multiple non-zero power CSI-RS resources (Non-Zero Power CSI-RS resource, NZP CSI-RS resource) contained in a CSI-RS resource set (CSI-RS resource set) are divided into two resource groups (resource group) to distinguish which TRP / panel the CSI-RS resources come from. In addition, the network can also configure at least one CSI-RS resource pair, and the two CSI-RS resources in the resource pair come from two resource groups respectively. According to the above configuration, the UE can calculate the NCJT CSI assuming that the two CSI-RS resources contained in each CSI-RS resource pair are transmitted in NCJT mode, and can also calculate the STRP CSI assuming that the CSI-RS resources from any one of the two groups are transmitted in a single TRP (Single TRP, STRP) mode. The network can configure two CSI feedback modes: the UE reports one NCJT CSI and X = 0, 1, 2 STRP CSIs, or reports the best CSI between the NCJT CSI and the STRP CSI. The NCJT CSI feedback of Rel-17 is enhanced based on the Type 1 codebook. The NCJT CSI feedback includes two precoding matrix indicators (PMIs), two rank indicators (RIs), corresponding to two CSI-RS resources, and a channel quality indicator (CQI) assumed by NCJT. Since the two TRPs cannot be precisely synchronized and the transmitted signals cannot guarantee a fixed phase relationship, the NCJT PMI does not include the amplitude and phase information between the two PMIs.

[0050] 2. CJT CSI Report

[0051] Rel-18 further extends the codebook of CJT of multiple TRP / panels based on the Type 2 (Type II) enhanced codebook of Rel-16 and the port selection Type II enhanced codebook of Rel-17. The Type II enhanced codebook of Rel-16 includes spatial domain (SD) compression and frequency domain (FD) compression information. The orthogonal basis of spatial domain and frequency domain compression generally adopts Discrete Fourier Transform (DFT) vectors. Due to the spatial sparsity and frequency domain correlation of the channel, the main energy is concentrated on fewer orthogonal bases after orthogonal transformation. Compression is achieved when the number of spatial domain orthogonal bases and the number of frequency domain orthogonal bases fed back are much smaller than their respective complete orthogonal bases. The generated precoding matrix can be written as Where W1 is the spatial compression matrix composed of L spatial compression vectors selected according to the spatial characteristics of the channel, W f is a frequency domain compression matrix composed of M frequency domain compression vectors selected according to the frequency domain characteristics of the channel, is the compression coefficient matrix corresponding to the spatial and frequency domain compression vectors. Each element is a complex number, quantizing the amplitude and phase, respectively. In the Rel-16 Type II enhanced codebook, both polarization directions of multiple layers share the same spatial orthogonal basis, while the layers independently select their own frequency domain orthogonal basis.

[0052] In CJT CSI feedback, in order to distinguish CSI-RS resources from different TRPs / panels, the network can configure N in a CSI-RS resource set. TRP (N TRP (integer between 1 and 4) CSI-RS resources correspond to different TRP / panel. The network can configure whether the user equipment (UE) must feedback N TRP The CJT CSI corresponding to each TRP / panel. TRP Select N≤N among TRP / panels TRP In the case of TRP / panel, the CSI report is passed by N TRP The bitmap reports which N CSI-RS resources the fed-back CJT CSI corresponds to.

[0053] Since the spatial and frequency compression characteristics of different TRP channels are different, the above-mentioned Rel-16 Type II enhanced codebook and Rel-17 port selection Type II enhanced codebook can be constructed in each TRP respectively, and then synthesized into complete CJT codebooks for multiple TRPs for feedback.

[0054] It is worth noting that in the relevant technology, the network will configure the terminal to report one of the CSI of NCJT and the CSI of CJT, and the CSI of NCJT is enhanced based on the Type I codebook, and the CSI of CJT is enhanced based on the Type II codebook. In this way, in the scenario where part of the multiple TRPs performs CJT and the other part performs NCJT, in order to realize the CSI information reporting of multiple TRPs, it is necessary to report the CSI report of CJT and the CSI report of NCJT separately, which makes the CSI reporting process complicated and resource-intensive, and cannot accurately reflect the CSI in this mixed situation, limiting the flexibility of network transmission.

[0055] In an embodiment of the present application, at least two of the CSI information of CJT, CSI information of NCJT and CSI information of STRP can be reported in one CSI report based on a unified CSI framework.

[0056] To facilitate understanding of the CSI transmission method provided in the embodiments of the present application, the following terms or nouns in the embodiments of the present application are first explained:

[0057] 1) First CSI information, such as CSI information of CJT, can achieve good synchronization, phase calibration and real-time interactive coordination between the TRPs corresponding to at least two CSI-RS resources corresponding to the CSI information of CJT so that CJT can be performed.

[0058] It should be noted that, in the embodiment of the present application, one CSI-RS resource can correspond to one TRP or one panel. For the sake of convenience, the embodiment of the present application is usually illustrated by taking the example that one CSI-RS resource can correspond to one TRP. The TRP in the embodiment of the present application can be understood as TRP or panel.

[0059] 2) The second CSI information, such as the CSI information of NCJT, cannot achieve precise synchronization, phase calibration or real-time interactive coordination between the TRPs corresponding to at least two CSI-RS resources corresponding to the NCJT CSI information, so only NCJT can be implemented.

[0060] 3) Third CSI information, such as STRP CSI information, where the STRP CSI information is CSI information obtained based on one CSI-RS resource.

[0061] 4) The first target CSI information can reflect at least two items of the first CSI information, the second CSI information, and the third CSI information.

[0062] 5) The second target CSI information is any one of the first CSI information, the second CSI information and the third CSI information.

[0063] 6) Target CSI information, including at least one of first target CSI information and second target CSI information.

[0064] 7) A first CSI report, which is a CSI report including only at least one first target CSI information.

[0065] 8) A second CSI report, including a CSI report of at least one item of at least one first target CSI information and at least one second target CSI information.

[0066] 9) CSI-RS resource group, a CSI-RS resource group includes at least one CSI-RS resource. When at least two TRPs / panels can achieve good synchronization, phase calibration and real-time interactive coordination, their respective corresponding CSI-RS resources belong to the same CSI-RS resource group. The first CSI information is obtained based on at least two CSI-RS resources in the same CSI-RS resource group; the second CSI information is obtained based on at least two CSI-RS resources in different CSI-RS resource groups; the third CSI information is obtained based on a CSI-RS resource in the same CSI-RS resource group. Generally speaking, one CSI-RS resource corresponds to one TRP or antenna panel. The TRP or panel corresponding to the CSI-RS in one CSI-RS resource group can realize CJT transmission, and the TRP or panel corresponding to the CSI-RS in different CSI-RS resource groups can only realize NCJT transmission.

[0067] The CSI transmission method, CSI transmission apparatus, and related equipment provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

[0068] Please refer to Figure 2. An embodiment of the present application provides a CSI transmission method, the execution subject of which can be a terminal. The terminal can be various types of terminals 11 listed in Figure 1, or other terminals other than the terminal types listed in the embodiment shown in Figure 1, which are not specifically limited here.

[0069] As shown in FIG2 , the CSI transmission method may include the following steps:

[0070] Step 201: The terminal sends a first CSI report to a network-side device, where the first CSI report includes at least one first target CSI information;

[0071] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0072] Among them, the first CSI information can be called CSI information of CJT, the second CSI information can be called CSI information of NCJT, and the third CSI information can be called CSI information of STRP.

[0073] The differences between CJT's CSI information and NCJT's CSI information include:

[0074] The CSI information of CJT includes the amplitude and phase relationship between the CSI obtained by each of its corresponding at least two CSI-RS resources; the CSI information of NCJT does not include the amplitude and phase relationship between the CSI obtained by each of its corresponding at least two CSI-RS resources.

[0075] The CSI information of the STRP is the same as the CSI information based on the Type II codebook and its enhanced codebook obtained from one CSI-RS resource in the related art, and will not be described in detail here.

[0076] In some embodiments, each of the first target CSI information is at least two of the first CSI information, the second CSI information, and the third CSI information, and may be a fusion of at least two of the CSI information of CJT, the CSI information of NCJT, and the CSI information of STRP.

[0077] Optionally, in a case where the type of the first target CSI information includes: the first CSI information and the second CSI information, the second CSI information includes NCJT CSI information obtained based on at least two of the first CSI information.

[0078] For example, assuming that the precoding matrix in the CSI information of the CJT can be expressed as the following formula:

[0079] Wherein, the superscript H represents the conjugate transpose of a matrix or vector, n is any integer from 1 to N, N is the number of CSI-RS resources corresponding to the CSI information of the CJT, and W 1,n L is selected based on the channel spatial characteristics obtained from the nth CSI-RS resource (corresponding to TRP n) n The spatial compression matrix composed of SD basis vectors, Wf,n M is selected based on the channel frequency domain characteristics obtained from the nth CSI-RS resource n The frequency domain compression matrix composed of frequency domain FD basis vectors, The compression coefficient matrix corresponding to the SD basis vector and FD basis vector obtained for the nth CSI-RS resource.

[0080] In this way, the precoding matrix of the NCJT's CSI information can be obtained based on the precoding matrix in the CSI information of at least two CJTs. The precoding matrices in the CSI information of at least two different CJTs cannot reflect the amplitude and phase relationship between the CSI information of at least two CJTs. As shown in the following formula:

[0081] Among them, the sub-matrix with the subscript Y1 is the precoding matrix in the CSI information of the first CJT, the sub-matrix with the subscript Y2 is the precoding matrix in the CSI information of the second CJT, and so on. The W of each sub-matrix 1,n 、 W f,n The matrix formed by multiple such sub-matrices is the precoding matrix for the CSI information of the NCJT obtained based on the precoding matrix in the CSI information of at least two CJTs. N1 is the number of CSI-RS resources corresponding to the CSI information of the first CJT, N2 is the number of CSI-RS resources corresponding to the CSI information of the second CJT, and so on.

[0082] For another example, assume that the precoding matrix in the CSI information of the CJT can be expressed as the following formula:

[0083] Where n is any integer from 1 to N, N is the number of CSI-RS resources corresponding to the CSI information of the CJT, W 1,n L is selected based on the channel spatial characteristics obtained from the nth CSI-RS resource (corresponding to TRP n) n The spatial compression matrix composed of SD basis vectors, W f The frequency domain compression matrix is ​​composed of M FD basis vectors selected according to the channel frequency domain characteristics obtained from N CSI-RS resources. The compression coefficient matrix corresponding to the SD basis vector and FD basis vector obtained for the nth CSI-RS resource.

[0084] In this way, the precoding matrix of the NCJT's CSI information can be obtained based on the precoding matrix in the CSI information of at least two CJTs, and the precoding matrices in the CSI information of at least two different CJTs cannot reflect the amplitude and phase relationship between the CSI information of the at least two CJTs. As shown in the following formula:

[0085] Among them, the sub-matrix with the subscript Y1 is the precoding matrix in the CSI information of the first CJT, the sub-matrix with the subscript Y2 is the precoding matrix in the CSI information of the second CJT, and so on. The W of each sub-matrix 1,n 、 W f The matrix formed by multiple such sub-matrices is the precoding matrix for the CSI information of the NCJT obtained based on the precoding matrix in the CSI information of at least two CJTs. N1 is the number of CSI-RS resources corresponding to the CSI information of the first CJT, N2 is the number of CSI-RS resources corresponding to the CSI information of the second CJT, and so on.

[0086] In this embodiment, the PMI of the first target CSI information includes PMIs of multiple groups of CSI-RS resources obtained in a CJT manner, and then a PMI in an NCJT manner is obtained.

[0087] Optionally, in a case where the type of the first target CSI information includes: the second CSI information and the third CSI information, the second CSI information includes NCJT CSI information obtained based on at least two of the third CSI information.

[0088] For example, the PMI precoding matrix of the NCJT CSI information is obtained based on the PMI precoding matrix of at least two STRPs, as shown in the following formula:

[0089] Among them, the sub-matrix with the subscript Y1 is the precoding matrix in the CSI information of the first STRP, or the precoding matrix in the CSI information obtained by the first CSI-RS resource; the sub-matrix with the subscript Y2 is the precoding matrix in the CSI information of the second STRP, or the precoding matrix in the CSI information obtained by the second CSI-RS resource, and so on. W1, W f The matrix formed by multiple such sub-matrices is the precoding matrix of the CSI information of the NCJT obtained based on the precoding matrix in the CSI information of at least two STRPs.

[0090] In this embodiment, the PMI of the first target CSI information includes PMIs of multiple CSI-RS resources respectively obtained in a STRP manner, and then a PMI in an NCJT manner is obtained.

[0091] Optionally, in a case where the type of the first target CSI information includes: the first CSI information, the second CSI information and the third CSI information, the second CSI information includes NCJT CSI information obtained based on at least one of the first CSI information and at least one of the third CSI information.

[0092] For example, the PMI precoding matrix in the NCJT CSI information is obtained based on a STRP PMI precoding matrix and a PMI precoding matrix in the CSI information of the CJT, as shown in the following formula:

[0093] or

[0094] Among them, the submatrix with the subscript Y1 is the precoding matrix in the CSI information of the first CJT, or the precoding matrix in the CSI information of the CJT obtained by N1 CSI-RS resources; the submatrix with the subscript Y2 is the precoding matrix in the CSI information of the second STRP, or the precoding matrix in the CSI information obtained by the second CSI-RS resource, and so on. The matrix composed of multiple such submatrices is the precoding matrix of the CSI information of the NCJT obtained based on the precoding matrix in the CSI information of at least two STRPs. It should be noted that the order and position of the precoding matrix in the CSI information of the above-mentioned CJT and the precoding matrix in the CSI information of the above-mentioned STRP can be changed arbitrarily.

[0095] In this embodiment, the PMI of the first target CSI information includes PMIs of multiple groups of CSI-RS resources obtained in CJT mode, PMIs of multiple CSI-RS resources obtained in STRP mode, and then PMIs obtained in NCJT mode.

[0096] As an optional implementation, the first CSI information is the CSI information of CJT obtained from different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained from CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

[0097] In the case where the one CSI-RS resource group includes multiple CSI-RS resources, some or all of the multiple CSI-RS resources included in the one CSI-RS resource group can obtain the first CSI information; or one CSI-RS resource among the multiple CSI-RS resources included in the one CSI-RS resource group can obtain the third CSI information.

[0098] Among them, the same CSI-RS resource group contains at least one CSI-RS resource. When the same CSI-RS resource group contains at least two CSI-RS resources, the TRPs / panels corresponding to the CSI-RS resources in the group can achieve good synchronization, phase alignment, and real-time interactive coordination, so that CJT CSI information can be obtained based on some or all CSI-RSs in the same CSI-RS resource group. However, the TRPs / panels corresponding to CSI-RS resources in different CSI-RS resource groups cannot achieve precise synchronization, phase alignment, or real-time interactive coordination, so only NCJT CSI information can be obtained.

[0099] In some implementations, the terminal may select a CSI-RS resource from the same CSI-RS resource group to obtain CSI information for CJT.

[0100] In some implementations, the terminal may select a CSI-RS resource group and the CSI-RS resources contained therein to obtain CSI information of NCJT from different CSI-RS resource groups.

[0101] In some embodiments, the terminal may select CSI-RS resources for obtaining CSI information of NCJT from at least two CSI-RS resource groups, and at least two CSI-RS resources are selected from at least one CSI-RS resource group as CSI-RS resources for obtaining CSI information of CJT.

[0102] In some embodiments, the terminal can select a CSI-RS resource for obtaining CSI information of NCJT from at least two CSI-RS resource groups, and a CSI-RS resource is selected from at least one CSI-RS resource group as the CSI-RS resource for obtaining CSI information of STRP.

[0103] In this embodiment, the terminal can select the CSI-RS resources for obtaining CJT's CSI information, the CSI-RS resource group for obtaining NCJT's CSI information and the CSI-RS resources contained in each, and the CSI-RS resources for obtaining STRP's CSI information based on the CSI-RS resource grouping.

[0104] In one implementation, the CSI-RS resource group may be pre-configured by the network side.

[0105] Optionally, the method further includes:

[0106] The terminal obtains CSI report configuration information and CSI-RS resource configuration information associated with the CSI report configuration information, wherein the CSI-RS resource configuration information is used to configure K CSI-RS resource groups, where K is a positive integer. Each CSI-RS resource group includes at least one CSI-RS resource.

[0107] In some implementations, the CSI-RS resource configuration information may be carried by Radio Resource Control (RRC) signaling or a Medium Access Control Control Element (MAC CE), which is not specifically limited herein.

[0108] The MAC CE carrying the CSI-RS resource configuration information can achieve more dynamic configuration of the CSI-RS resource group.

[0109] The CSI report configuration information may configure the terminal to obtain the first target CSI information based on all or part of the K CSI-RS resource groups configured by the associated CSI-RS resource configuration information.

[0110] Optionally, the CSI-RS resource configuration information includes at least one of the following:

[0111] Indication information of the number K of the CSI-RS resource groups;

[0112] CSI-RS resources included in each of the CSI-RS resource groups;

[0113] a first CSI-RS resource set (CSI-RS resource set), wherein the first CSI-RS resource set includes the K CSI-RS resource groups;

[0114] K CSI-RS resource sets (CSI-RS resource sets), each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

[0115] In one implementation, the network may configure K CSI-RS resource groups and configure the CSI-RS resources included in each CSI-RS resource group.

[0116] For example, as shown in Figure 3, the network is configured with K CSI-RS resource groups, and the kth CSI-RS resource group contains Q k CSI-RS resources. In this case, the terminal may obtain CSI information based on the CSI-RS resources in all or part of the K CSI-RS resource groups. For example, the terminal may obtain CSI information based on the CSI-RS resources in M ​​CSI-RS resource groups. In this case, M may be less than or equal to K.

[0117] In addition, the terminal can use all or part of the CSI-RS resources in the selected M CSI-RS resource groups to obtain CSI information. At this time, assuming that the selected m-th CSI-RS resource group is the k-th CSI-RS resource group configured by the network, then N m Can be less than or equal to Q k , N m is the number of CSI-RS resources used to obtain CSI information in the selected m-th CSI-RS resource group. m When N is 1, the CSI information of STRP can be obtained based on a CSI-RS resource selected in the mth CSI-RS resource group; m When it is greater than 1, it can be based on the N selected in the mth CSI-RS resource group. m The CSI information of CJT is obtained by using CSI-RS resources.

[0118] In one embodiment, the first CSI-RS resource set (CSI-RS resource set) includes the K CSI-RS resource groups, which may indicate that the K CSI-RS resource groups are located in the same CSI-RS resource set, and K CSI-RS resource groups are obtained by grouping the CSI-RS resources in the CSI-RS resource set.

[0119] For example, the network configures a CSI-RS resource set including CSI-RS resources 1, 2, 3, 4, 5, 6, 7, and 8. It may also configure two CSI-RS resource groups in the CSI-RS resource set: {{1, 2, 3, 4}, {5, 6, 7, 8}}, or three CSI-RS resource groups in the CSI-RS resource set: {{1, 2}, {3, 4}, {5, 6, 7, 8}}, or {{1}, {2}, {3, 4}, {5, 6, 7, 8}}, etc.

[0120] In another implementation, a CSI-RS resource set is a CSI-RS resource group. Thus, configuring K CSI-RS resource sets is equivalent to configuring K CSI-RS resource groups.

[0121] It should be noted that each first target CSI information can select M of the corresponding CSI-RS resource groups out of the K CSI-RS resource groups, and the corresponding CSI-RS resource groups selected by different first target CSI information can be different, and the number of corresponding CSI-RS resource groups selected by different first target CSI information can also be different.

[0122] In some embodiments, the terminal may only feedback the PMI corresponding to part of the CSI-RS resource groups configured by the network, which means that the terminal selects part of the TRP or panel as the NCJT CSI report; the terminal may also feedback the PMI corresponding to part of the CSI-RS resources in a certain CSI-RS resource group, which means that the terminal selects part of the TRP or panel as the CJT CSI report or as the STRP CSI report.

[0123] Optionally, the terminal may also indicate in the CSI report the identifiers of the M≥1 CSI-RS resource groups corresponding to the first target CSI information, and the identifiers of the CSI-RS resources within a certain CSI-RS resource group, such as indicating CSI-RS resource group Y m N in m CSI-RS resources, or all CSI-RS resources in the configured K CSI-RS resource groups are uniformly numbered, and the selected CSI-RS resource number is indicated. According to the indicated CSI-RS resource number, the CSI-RS resource group and CSI-RS resource to which these indicated CSI-RS resources belong can be distinguished.

[0124] In other implementations, the network may configure the terminal to feedback the corresponding CSI-RS resource group required for the PMI, as well as the CSI-RS resources within a certain CSI-RS resource group.

[0125] Of course, when the network configures the terminal to feedback the PMI that requires a corresponding CSI-RS resource group, or configures the feedback of the PMI that requires a corresponding CSI-RS resource group, the terminal can also select the CSI-RS resource group to obtain CSI information from the CSI-RS resource group that requires a corresponding PMI and the CSI-RS resources that require a corresponding CSI-RS resource group in the network configuration, or select the CSI-RS resources within the CSI-RS resource group to obtain CSI information. No specific limitation is made here.

[0126] In this embodiment, the network can configure the terminal to report the PMI of certain TRPs or panels, or the terminal can choose to report the PMI of certain TRPs or panels. For example, the terminal determines the CSI-RS resource group and CSI-RS resources corresponding to the first target CSI information based on the channel status of each TRP, such as determining the TRP or panel participating in CJT and NCJT, or the TRP or panel participating in STRP and NCJT.

[0127] As an optional implementation, the method further includes:

[0128] The terminal determines M CSI-RS resource groups corresponding to the target CSI information from the K CSI-RS resource groups, where M is a positive integer less than or equal to K, and the target CSI information includes any one of the first target CSI information and the second target CSI information.

[0129] In this embodiment, the terminal can determine the CSI-RS resource group and CSI-RS resources corresponding to the first target CSI information based on the channel status of each TRP in the K CSI-RS resource groups configured by the network, such as determining the TRP or panel participating in CJT and NCJT, or the TRP or panel participating in STRP and NCJT; or determine the CSI-RS resource group and CSI-RS resources corresponding to the second target CSI information, such as determining the TRP or panel participating in CJT, or the TRP or panel participating in NCJT, or the TRP or panel participating in STRP.

[0130] Optionally, the M CSI-RS resource groups include one of the following:

[0131] a first CSI-RS resource group;

[0132] a second CSI-RS resource group;

[0133] at least two first CSI-RS resource groups;

[0134] at least two second CSI-RS resource groups;

[0135] at least one first CSI-RS resource group and at least one second CSI-RS resource group;

[0136] The first CSI-RS resource group includes at least two CSI-RS resources, and the second CSI-RS resource group includes one CSI-RS resource.

[0137] In some implementations, when the M CSI-RS resource groups include only one first CSI-RS resource group, the target CSI information obtained by the terminal includes at least one of the following:

[0138] The second target CSI information is the first CSI information, and the terminal obtains CSI information of the CJT based on at least two CSI-RS resources in the first CSI-RS resource group;

[0139] The second target CSI information is third CSI information, and the terminal obtains the CSI information of the STRP of the single CSI-RS resource based on a CSI-RS resource in the first CSI-RS resource group.

[0140] In some implementations, when the M CSI-RS resource groups include only one second CSI-RS resource group, the target CSI information obtained by the terminal includes:

[0141] The second target CSI information is third CSI information, and the terminal can obtain the CSI information of the STRP of the single CSI-RS resource based on a CSI-RS resource in the second CSI-RS resource group.

[0142] In some implementations, when the M CSI-RS resource groups include only at least two first CSI-RS resource groups, the target CSI information obtained by the terminal includes any one of the following:

[0143] The type of the first target CSI information is first CSI information and second CSI information. The terminal obtains the CSI information of the corresponding CJT based on the at least two CSI-RS resources in each first CSI-RS resource group, and obtains the CSI information of the NCJT based on the obtained CSI information of the at least two CJTs.

[0144] The type of the first target CSI information is the third CSI information and the second CSI information. The terminal obtains the CSI information of the corresponding STRP based on a CSI-RS resource in each first CSI-RS resource group, and obtains the CSI information of the NCJT based on the obtained CSI information of at least two STRPs.

[0145] The types of the first target CSI information are first CSI information, second CSI information and third CSI information. The terminal obtains the CSI information of the corresponding CJT based on at least two CSI-RS resources in part of the first CSI-RS resource groups in at least two first CSI-RS resource groups, obtains the CSI information of the corresponding STRP based on one CSI-RS resource in another part of the first CSI-RS resource group, and further obtains the CSI information of the NCJT based on the obtained CSI information of at least one CJT and the CSI information of at least one STRP.

[0146] In some implementations, when the M CSI-RS resource groups include only at least two second CSI-RS resource groups, the target CSI information obtained by the terminal includes:

[0147] The types of the first target CSI information are third CSI information and second CSI information. The terminal obtains the CSI information of the corresponding STRP based on a CSI-RS resource in each second CSI-RS resource group, and obtains the CSI information of NCJT based on the obtained CSI information of at least two STRPs.

[0148] In some implementations, when the M CSI-RS resource groups include at least one first CSI-RS resource group and at least one second CSI-RS resource group, the target CSI information obtained by the terminal includes any one of the following:

[0149] The types of the first target CSI information are first CSI information, second CSI information and third CSI information. The terminal obtains the CSI information of the corresponding CJT based on at least two CSI-RS resources in part of the first CSI-RS resource groups in at least two first CSI-RS resource groups, obtains the CSI information of the corresponding STRP based on one CSI-RS resource in another part of the first CSI-RS resource group, obtains the CSI information of the corresponding STRP based on one CSI-RS resource in each second CSI-RS resource group, and further obtains the CSI information of NCJT based on the obtained CSI information of at least one CJT and the CSI information of at least two STRPs; or the terminal may obtain the CSI information of the corresponding CJT based on at least two CSI-RS resources in each first CSI-RS resource group, obtain the CSI information of the corresponding STRP based on one CSI-RS resource in each second CSI-RS resource group, and further obtain the CSI information of NCJT based on the obtained CSI information of at least one CJT and the CSI information of at least two STRPs;

[0150] The type of the first target CSI information is the third CSI information and the second CSI information. The terminal can obtain the CSI information of the corresponding STRP based on a CSI-RS resource in each first CSI-RS resource group, obtain the CSI information of the corresponding STRP based on a CSI-RS resource in each second CSI-RS resource group, and obtain the CSI information of NCJT based on the obtained CSI information of at least two STRPs.

[0151] As an optional implementation, the method further includes:

[0152] The terminal sends at least one of the following to the network side device:

[0153] first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information;

[0154] second feedback information, where the second feedback information indicates the CSI-RS resources in each of the CSI-RS resource groups corresponding to the target CSI information;

[0155] Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

[0156] In this embodiment, when the terminal independently selects the M CSI-RS resource groups, the terminal reports the CSI-RS resource group corresponding to the target CSI information fed back; when the terminal independently selects the CSI-RS resources in the M CSI-RS resource groups, the terminal reports the CSI-RS resources in each of the CSI-RS resource groups corresponding to the target CSI information fed back; when the terminal independently selects the first combination corresponding to the target CSI information, the terminal reports the first combination corresponding to the target CSI information fed back.

[0157] It should be noted that at least one of the above-mentioned first feedback information, second feedback information and third feedback information can be carried in the target CSI report and sent to the network side device, or can be sent to the network side device using other messages or signaling, which is not specifically limited here.

[0158] In some implementations, the CSI reporting configuration information may configure or indicate which type of CSI information the terminal must report.

[0159] Optionally, the terminal sending a first CSI report to the network side device includes:

[0160] In a case where the CSI report configuration information instructs the terminal to report at least two items of the first CSI information, the second CSI information, and the third CSI information, the terminal sends a first CSI report to the network-side device.

[0161] In this embodiment, the terminal can obtain and report the first target CSI information only when the network side instructs the terminal to report at least two of the CSI information of CJT, NCJT and STRP (instructing the terminal to report the first target CSI information).

[0162] It is worth mentioning that when the network side does not instruct the terminal to report at least two of the CSI information of CJT, NCJT and STRP, the terminal can obtain and report any one of the CSI information of CJT, NCJT and STRP in accordance with the method in the relevant technology; or, the terminal can decide on its own whether to report the first target CSI information, or to report any one of the CSI information of CJT, NCJT and STRP.

[0163] Among them, the network side does not instruct the terminal to report at least two of the CSI information of CJT, the CSI information of NCJT and the CSI information of STRP. It may be that the CSI report configuration information does not carry indication information instructing the terminal to report at least two of the first CSI information, the second CSI information and the third CSI information, or the CSI report configuration information does not carry restriction information for restricting the terminal to report at least two of the first CSI information, the second CSI information and the third CSI information, or the CSI report configuration information carries indication information instructing the terminal to report at least one of the CSI information of CJT, the CSI information of NCJT and the CSI information of STRP.

[0164] Optionally, the method further includes:

[0165] When the CSI reporting configuration information does not instruct the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI reporting configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI reporting configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information, and the third CSI information, the network-side device receives a second CSI report from the terminal, where the second CSI report includes at least one of the following:

[0166] at least one piece of first target CSI information;

[0167] At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information, and the third CSI information.

[0168] Among them, when the terminal chooses to report at least one of the first target CSI information, the second CSI report is the same as the first CSI report; when the terminal chooses to report at least one of the second target CSI information, the second CSI report is the same as the regular CSI report.

[0169] The second CSI report can be understood as a situation where the first target CSI information is reported in addition to the regular CSI report, and can be regarded as a further extension of the regular CSI report; of course, the second CSI report can degenerate into a regular CSI report.

[0170] Of course, the terminal can also report at least two target CSI information in one CSI report, all of which are the first target CSI reports, or all of which are the second target CSI reports, or part of which is the first target CSI information and the other part is the second target CSI information, which is not specifically limited here.

[0171] For example, a target CSI information and the CSI-RS resources for obtaining the target CSI information may be as follows:

[0172] Only one TRP or panel (one CSI-RS resource included in a CSI-RS resource group) is selected and the PMI is reported. In this case, M=1, and N1=1 for the CSI-RS resource group Y1 corresponding to the target CSI information.

[0173] Only the TRP or panel of the CJT is selected (at least two CSI-RS resources included in one CSI-RS resource group are selected) and the PMI is reported. In this case, M=1, and N1 of the CSI-RS resource group Y1 corresponding to the target CSI information is greater than 1.

[0174] Only select the TRP or panel of STRP and NCJT (select CSI-RS resources of at least two CSI-RS resource groups, and each CSI-RS resource group contains only one CSI-RS resource) and report PMI. At this time, M>1, the CSI-RS resource groups corresponding to the target CSI information are Y1,…,Y M N in m =1(m=1,…,M);

[0175] Select both the TRP or panel of CJT or STRP and the TRP or panel of NCJT (select CSI-RS resources of at least two CSI-RS resource groups and at least one CSI-RS resource group contains at least two CSI-RS resources) and report PMI. At this time, M>1, the CSI-RS resource groups corresponding to the target CSI information are Y1,…,Y M There is at least one CSI-RS resource group Y m N m >1(m=1,…,M).

[0176] In this embodiment, when the network side does not instruct the terminal to report at least two of the CSI information of CJT, the CSI information of NCJT and the CSI information of STRP, the terminal can obtain and report any one of the CSI information of CJT, the CSI information of NCJT and the CSI information of STRP in accordance with the method in the relevant technology; or, the terminal can decide on its own whether to report the first target CSI information, or to report any one of the CSI information of CJT, the CSI information of NCJT and the CSI information of STRP, or to report both.

[0177] In some implementations, the CSI report configuration information includes at least one of the following:

[0178] first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information is used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0179] second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information;

[0180] third indication information, the third indication information being used to indicate at least one first combination, the first combination including at least one CSI-RS resource group, the first combination being used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources within the CSI-RS resource group, the CSI-RS resource group corresponding to the target CSI information including one of the first combinations;

[0181] Fourth indication information, where the fourth indication information is used to indicate at least one of the following:

[0182] a type of at least one of the first target CSI information;

[0183] at least one piece of the first CSI information;

[0184] at least one piece of the second CSI information;

[0185] at least one of the third CSI information.

[0186] In one embodiment, the first indication information may instruct the terminal to indicate M CSI-RS resource groups for obtaining target CSI information from the K CSI-RS resource groups configured by the network, or indicate at least one CSI-RS resource group and the terminal may select M CSI-RS resource groups from them for obtaining target CSI information.

[0187] In another embodiment, the second indication information may instruct the terminal to indicate at least one CSI-RS resource group from the K CSI-RS resource groups configured by the network for obtaining the target CSI information, and the CSI-RS resources in the at least one CSI-RS resource group for obtaining the target CSI information, or the terminal may select the CSI-RS resources for obtaining the target CSI information from the at least one CSI-RS resource group.

[0188] In another embodiment, the terminal can be instructed by the first indication information to indicate M CSI-RS resource groups from the K CSI-RS resource groups configured by the network, and the terminal can be instructed by the second indication information to select CSI-RS resources for obtaining target CSI information from the M CSI-RS resource groups; the terminal can be instructed by the first indication information to select M CSI-RS resource groups from at least one CSI-RS resource group among the K CSI-RS resource groups configured by the network, and the terminal can be instructed by the second indication information to select CSI-RS resources for obtaining target CSI information from the M CSI-RS resource groups.

[0189] In another embodiment, the network may configure a first combination including at least one CSI-RS resource group, and instruct the terminal through third indication information on which CSI-RS resource group in the first combination to use to obtain the target CSI information, or the terminal may select and report the target CSI information corresponding to at least one first combination from the configured multiple first combinations.

[0190] For example, the network configures a CSI-RS resource set including CSI-RS resources 1, 2, 3, 4, 5, 6, 7, and 8. Two CSI-RS resource groups may also be configured in the CSI-RS resource set: {{1, 2, 3, 4}, {5, 6, 7, 8}}, and the first combination of CSI-RS resource groups shown in Table 1 below may be configured:

[0191] Table 1

[0192] It should be noted that the network can configure several first combinations that can perform NCJT. The terminal can only select TRP groups that can perform NCJT and CJT from these first combinations. For example, the network configures two CSI-RS resource group combinations: {CSI-RS resource group X1, CSI-RS resource group X2} and {CSI-RS resource group X1, CSI-RS resource group X3}. The terminal can feedback the combination number to indicate the CSI-RS resource group participating in NCJT.

[0193] For example, the network configures a CSI-RS resource set including CSI-RS resources 1, 2, 3, 4, 5, 6, 7, and 8. It can also configure two CSI-RS resource groups in the CSI-RS resource set: {1, 2}, {3, 4}, and {5, 6, 7, 8}. Furthermore, the network configures the combination of CSI-RS resource groups shown in Table 2 below:

[0194] Table 2

[0195] In addition, the terminal may also assume the CSI assumption of the STRP of any one or more CSI-RS resources in the CSI-RS resource set and report the selected CSI-RS resources and the corresponding one or more third CSI information. Alternatively, the terminal may also select some CSI-RS resources in the CSI-RS resource group in the CJT mode and report the selected CSI-RS resources and the corresponding first CSI information.

[0196] Optionally, the network may identify the first combination or individual CSI-RS resources through a CSI-RS Resource Indicator (CRI), wherein the CRI is commonly numbered in all first combinations and all individual CSI-RS resources.

[0197] As an optional implementation, the method further includes:

[0198] The terminal receives CSI interference measurement (CSI-IM) resource configuration information from a network-side device, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding to any one of the following:

[0199] The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

[0200] In one implementation, a CSI-IM resource may correspond one-to-one to each combination of CSI-RS resource groups.

[0201] In another implementation, all or part of the K CSI-RS resource groups may share the same CSI-IM resource.

[0202] In yet another implementation, CSI-IM resources may correspond one-to-one with CSI-RS resources.

[0203] This embodiment can flexibly configure the CSI-IM resources of the CSI-RS resources in the K CSI-RS resource groups through the CSI-IM resource configuration information.

[0204] As an optional implementation manner, the target CSI information further includes at least one basis vector group, where the basis vector group includes at least one of a spatial domain SD basis vector group and a frequency domain FD basis vector group, and the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0205] The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector group includes at least one of the following:

[0206] Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group;

[0207] At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

[0208] In one implementation, the target CSI information may use different basis vector groups corresponding to different CSI-RS resources.

[0209] For example, assuming that the SD orthogonal vector basis and the FD orthogonal vector basis of each TRP are independently selected and reported as feedback, the PMI of the first target CSI information is as follows:

[0210] or

[0211] or

[0212] The meanings of the symbols in the formula are as described above. Among them, each W1 in the matrix Y1 and each W1 in the matrix Y2 are independently selected SD basis vector groups and fed back. f , each W in the matrix Y2 f etc. are all independently selected FD basis vector groups and fed back for reporting.

[0213] In another embodiment, different CSI-RS resources corresponding to the target CSI information may use a common base vector group, such as CSI-RS resources within a CSI-RS resource group correspond to the same base vector group.

[0214] For example, assuming that the SD orthogonal basis vector group of each TRP is independently selected and reported as feedback, and each TRP selects a common FD orthogonal basis vector group and reports as feedback, the PMI of the first target CSI information is as follows:

[0215] or

[0216] or

[0217] The meanings of the symbols in the formula are as described above. Among them, each W1 in the matrix Y1 and each W1 in the matrix Y2 are independently selected SD basis vector groups and fed back and reported, while each W1 in the matrix Y1 f , each W in the matrix Y2 f etc. all jointly select the same FD basis vector group and report it back.

[0218] Optionally, each CSI-RS resource corresponding to the PMI may correspond to a respective basis vector group; or each CSI-RS resource group may correspond to the same basis vector group; or some CSI-RS resource groups may each correspond to a basis vector group, and each CSI-RS resource contained in the remaining CSI-RS resource groups may each correspond to a basis vector group.

[0219] It should be noted that a CSI-RS resource group corresponds to a base vector group, and the selected base vector group can be considered to apply to all CSI-RS resources selected within the CSI-RS resource group. This means that multiple TRPs or panels correspond to the same base vector group, for example, multiple panels placed adjacently and facing the same direction correspond to the same base vector group.

[0220] In this embodiment, the terminal reports the CSI-RS resource or the basis vector group corresponding to the CSI-RS resource group for obtaining target CSI information in the CSI report.

[0221] Optionally, the method further includes:

[0222] The terminal receives base vector configuration information from a network-side device, where the base vector configuration information includes at least one of the following:

[0223] the number of the configured basis vector groups;

[0224] the number of basis vectors included in the basis vector group of each configuration;

[0225] A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following:

[0226] CSI-RS resources;

[0227] CSI-RS resource group.

[0228] In this embodiment, the number of basis vector groups reported by the terminal, the number of basis vectors included in each basis vector group, and the correspondence between each basis vector group and CSI-RS resources or CSI-RS resource groups are configured by the network.

[0229] Of course, the terminal may also indicate in the CSI report the number of basis vector groups corresponding to the target CSI information, the number of basis vectors contained in each basis vector group, and the correspondence between each basis vector group and the CSI-RS resource or CSI-RS resource group for obtaining the target CSI information.

[0230] Optionally, the target CSI information further includes at least one of the following:

[0231] Fourth feedback information, where the fourth feedback information is used to indicate the number of basis vector groups corresponding to the target CSI information;

[0232] Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

[0233] For example: the combination of the number of basis vectors of the basis vector group is used for all CSI-RS resources of the M CSI-RS resource groups corresponding to the PMI, and the terminal reports one SD basis vector group number; or the combination of the number of basis vectors of the SD basis vector group is used for each CSI-RS resource group corresponding to the PMI, and the terminal reports M SD basis vector group numbers.

[0234] For another example: The network side configures N as shown in Table 3 below through RRC signaling L ≥ 1 optional number of SD basis vectors L n combination of N L >1, the second part of the CSI report (part 2) includes the L selected by the terminal n Combination instructions.

[0235] Table 3

[0236] In one implementation, the terminal may report an SD basis vector group number, and the number of basis vectors in the basis vector group is combined for all CSI-RS resources of the M CSI-RS resource groups corresponding to the PMI.

[0237] For example, when the number of CSI-RS resources corresponding to the target CSI information is 4, the terminal can select N TRP =4, select the most appropriate one from the four combinations of SD basis vector numbers and report the corresponding SD basis vector group number.

[0238] In another implementation, the terminal may report M SD basis vector group numbers, and the M SD basis vector group numbers correspond one-to-one to the M CSI-RS resource groups corresponding to the PMI. In this way, the number of basis vectors in one SD basis vector group is combined for one CSI-RS resource group corresponding to the PMI.

[0239] For example: the target CSI information corresponds to M = 3 CSI-RS resource groups, where CSI-RS resource group Y1 contains N1 = 2 CSI-RS resources, CSI-RS resource group Y2 contains N2 = 1 CSI-RS resource, and CSI-RS resource group Y3 contains N3 = 3 CSI-RS resources. The terminal can TRP =2, select the most appropriate one of the four SD basis vector number combinations and report the corresponding SD basis vector group number. TRP =1, select the most appropriate one of the three SD basis vector number combinations and report the corresponding SD basis vector group number. TRP =3, select the most appropriate one from the five combinations of SD basis vector numbers and report the corresponding SD basis vector group number.

[0240] Optionally, in a case where the CSI-RS resource group corresponds one-to-one to the FD basis vector group, the target CSI information further includes multiple groups of offset values; wherein the multiple groups of offset values ​​correspond one-to-one to the CSI-RS resource group, and one group of offset values ​​is used to indicate the phase offset value of the FD basis vector between a first resource and a second resource in the corresponding CSI-RS resource group, where the second resource is a reference CSI-RS resource in the CSI-RS resource group, and the first resource is each CSI-RS resource in the CSI-RS resource group except the second resource; or,

[0241] In a case where the at least two or all CSI-RS resource groups correspond to the same FD basis vector group, the target CSI information further includes an offset value of the FD basis vector of a third resource compared to the FD basis vector of a fourth resource; wherein the fourth resource is a reference CSI-RS resource in the at least two or all CSI-RS resource groups, and the third resource is each CSI-RS resource in the at least two or all CSI-RS resource groups except the fourth resource.

[0242] In some embodiments, each of the M CSI-RS resource groups corresponding to the target CSI information corresponds to an FD basis vector group, and all CSI-RS resources in the CSI-RS resource group share the FD basis vector group. In addition, the target CSI information may also include M groups of offset values, and the mth group of offset values ​​includes CSI-RS resource group Y. m N m -1 offset value, representing CSI-RS resource group Y m The phase offset between each FD basis vector in and a reference FD basis vector, N m Indicates CSI-RS resource group Y m The total number of CSI-RS resources in .

[0243] In some implementations, all CSI-RS resources corresponding to the target CSI information correspond to one FD basis vector group (all CSI-RS resources select a common FD basis vector group). In addition, the target CSI information may also include The offset values ​​respectively represent the phase offset between the FD basis vector corresponding to each CSI-RS resource and a reference FD basis vector.

[0244] For example, assuming that the N CSI-RS resources corresponding to the target CSI information determined by the terminal share the FD basis vector group W f , and report the phase offset of the FD basis vector group corresponding to N-1 CSI-RS resources, where the FD basis vector group corresponding to CSI-RS resource n is W f,n Reference CSI-RS resources The FD basis vector group W f The phase shift is Reference CSI-RS resources The phase of the FD basis vector group (reference FD basis vector group) Then the FD basis vector group of CSI-RS resource n can be expressed as the following formula:

[0245] Wherein, N3 is the number of PMIs in the frequency domain.

[0246] In some implementations, each CSI-RS resource corresponding to the PMI corresponds to a respective FD basis vector group, and each CSI-RS resource independently selects an FD basis vector group. In this case, the target CSI information may not include an offset value, or may include The offset values ​​respectively represent the phase offset between the FD basis vector corresponding to each CSI-RS resource and a reference FD basis vector therein.

[0247] In this embodiment, a reference FD basis vector can be selected from the PMI of each CSI-RS resource group, or a reference FD basis vector can be selected from the PMI of all CSI-RS resource groups, and the offset values ​​of other FD basis vectors and the reference FD basis vector can be reported. In this way, the amount of data reported in the PMI can be reduced, and the overhead of CSI reporting can be reduced.

[0248] As an optional implementation, the target CSI information further includes a Strongest Coefficient Indication (SCI);

[0249] Among them, the SCI is used to indicate at least one of the following: the CSI-RS resource group to which the strongest compression coefficient belongs, the CSI-RS resource corresponding to the strongest compression coefficient, the SD basis vector corresponding to the strongest compression coefficient, and the FD basis vector corresponding to the strongest compression coefficient; the SCI corresponds one-to-one to the first target CSI-RS resource group; or, the same SCI corresponds to all of the first target CSI-RS resource groups; the first target CSI-RS resource group is a CSI-RS resource group that contains at least two CSI-RS resources in the CSI-RS resource group corresponding to the target CSI information.

[0250] In some embodiments, the SCI corresponds one-to-one to the first target CSI-RS resource group. In this case, there are M SCIs, and all compression coefficient amplitude values ​​of the CSI-RS resources of each CSI-RS resource group corresponding to the PMI, except for the compression coefficient indicated by the SCI corresponding to the current CSI-RS resource group, are quantized values ​​of the ratio with the SCI.

[0251] Optionally, the target CSI information may further include the CSI-RS resource group number to which the strongest SCI among the M SCIs belongs.

[0252] For example, assuming that the target CSI information is obtained based on CSI-RS resource groups Y1, Y2, and Y3, and assuming that the strongest CSI-RS resource group is Y2 (corresponding to the strongest TRP), the SCI includes the content shown in Table 4 below:

[0253] Table 4

[0254] As shown in Table 4 above, the SCI for the strongest CSI-RS resource group can be placed first, and the SCIs corresponding to other CSI-RS resource groups can be arranged in the order of the configured CSI-RS resource groups. Typically, the FD basis vector of the SCI is adjusted to the first one, so the FD basis number of the SCI does not need to be reported.

[0255] In some implementations, the same SCI corresponds to all first target CSI-RS resource groups. In this case, there is only one SCI, and the amplitude values ​​of all compression coefficients for all CSI-RS resources corresponding to the PMI, except for the compression coefficient indicated by the SCI, are quantized ratios with the SCI. In this case, the SCI includes at least one of the following information: the CSI-RS resource group to which the strongest coefficient belongs, the sequence number of the SD basis vector, and the sequence number of the FD basis vector.

[0256] As an optional implementation, the number of CSI processing units (CSI Processing Unit, CPU) used to process the CSI report is related to at least one of the following: the number K of configured CSI-RS resource groups, the number of CSI-RS resources contained in each of the CSI-RS resource groups, the number of target CSI information, and the number of the first combinations.

[0257] For example: or Among them A k ≥1 is CSI-RS resource group X k The corresponding CPU usage factor, B k CSI-RS resource group X k The corresponding increase in CPU usage, B is the increase in overall CPU usage. k Or B can be 0, or it can be a constant or a number related to K.

[0258] Another example: CP+D, where C≥1 is the factor of NCJT using the CPU, D is the additional item of NCJT using the CPU, and D can be 0.

[0259] It should be noted that the formula in the embodiment of the present application is only used as an example. The number of CPUs can also be determined in other ways according to the configured number of CSI-RS resource groups K, the number of CSI-RS resources contained in each CSI-RS resource group, the number of target CSI information, and the number of the first combinations, such as performing weighted summation of the configured number of CSI-RS resource groups K, the number of CSI-RS resources contained in each CSI-RS resource group, the number of target CSI information, and the number of the first combinations. Here, there is no specific limitation on the method of determining the number of CPUs based on the configured number of CSI-RS resource groups K, the number of CSI-RS resources contained in each CSI-RS resource group, the number of target CSI information, and the number of the first combinations.

[0260] Optionally, the target CSI information further includes at least one of the following:

[0261] Layer Indicator (LI), LI combination, strongest CSI-RS resource group, Rank Indicator (RI), RI combination, Channel Quality Indicator (CQI);

[0262] The RI combination includes M RI values, the M RI values ​​correspond one-to-one to the M CSI-RS resource groups corresponding to the target CSI information, and the strongest CSI-RS resource group is the CSI-RS resource group including the highest signal to interference plus noise ratio (SINR) layer among the M CSI-RS resource groups.

[0263] In some implementations, the LI indicates the layer with the highest signal to interference plus noise ratio (SINR) in the target CSI information, and one LI is used to indicate the layer with the highest SINR among the M CSI-RS resource groups corresponding to the target CSI information; or

[0264] The LIs in the LI combination respectively indicate the layer with the highest SINR in the second target CSI-RS resource group, wherein the second target CSI-RS resource group is the CSI-RS resource group with an RI value greater than 1 in the M CSI-RS resource groups.

[0265] For example, when the rank of each of the M CSI-RS resource groups corresponding to the target CSI information is greater than 1, the target CSI information includes M LIs, which are the LIs of the M CSI-RS resource groups corresponding to the PMI.

[0266] Optionally, the target CSI information may include the LI combination, wherein the LIs in the LI combination respectively indicate the layer with the highest SINR in the second target CSI-RS resource group, and may further indicate the LI of the strongest CSI-RS resource group in the LI combination.

[0267] Among them, the PMI corresponding to the LI during NCJT transmission can assist the network in determining the layer corresponding to the Phase Tracking Reference Signal (PTRS), or performing TRP selection or layer selection.

[0268] As an optional implementation manner, the CSI report configuration information further includes:

[0269] RI restriction information, wherein the K CSI-RS resource groups configured by the CSI-RS resource configuration information associated with the CSI report configuration information correspond one-to-one with the RI restriction information; or, all CSI-RS resource groups to which the CSI-RS resources corresponding to the target CSI information belong correspond to the same RI restriction information; or, different target CSI information corresponds to different RI restriction information.

[0270] In some implementations, each CSI-RS resource group corresponds to an RI restriction, and multiple RIs satisfy certain relationships, for example: the sum of the RIs corresponding to multiple CSI-RS resource groups does not exceed the total RI restriction, and the total rank of the PMI does not exceed the total RI restriction value.

[0271] In some implementations, all CSI-RS resource groups corresponding to a PMI correspond to an RI restriction, which is a multiple RI combination configured by the network or agreed upon by the protocol. Each RI combination is associated with all CSI-RS resource groups corresponding to the PMI, and the RI restriction limits the combination of RIs.

[0272] In some embodiments, different target CSI information corresponds to different RI restriction information, which may be: each CSI hypothesis corresponds to an RI restriction, such as RI restriction of NCJT, RI restriction of CJT, RI restriction of a mixture of CJT and NCJT, and RI restriction of STRP / DPS.

[0273] As an optional implementation manner, the uplink control indicator (UCI) of the target CSI information includes a second part (part2), and the part2 includes: a first information group Group0, a second information group Group1, and a third information group Group2;

[0274] Group 0 carries at least one of the following:

[0275] the first feedback information;

[0276] the second feedback information;

[0277] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of SD basis vector groups;

[0278] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of SD basis vectors;

[0279] Said SCI;

[0280] The LI or LI combination;

[0281] A second codeword CQI, wherein, when the total rank number is greater than a preset value, the second codeword CQI includes at least one of a wideband CQI, an odd subband CQI, and an even subband CQI;

[0282] Group 1 carries at least one of the following:

[0283] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of FD basis vector groups;

[0284] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of FD basis vectors;

[0285] The LI or LI combination;

[0286] the second codeword CQI;

[0287] Group 2 carries at least one of the following:

[0288] The second codeword CQI.

[0289] The total rank is greater than a preset value, usually greater than 4.

[0290] It should be noted that when the uplink resources for transmitting the CSI report cannot accommodate all the UCIs of the CSI report, Group 2, then Group 1, and finally Group 0 are discarded in order until the remaining UCIs can be accommodated.

[0291] By placing at least one of the first feedback information, the second feedback information, the fourth feedback information indicating that the number of basis vector groups is the number of SD basis vector groups, the fifth feedback information indicating that the number of basis vectors is the number of SD basis vectors, the SCI, the LI or LI combination, and the second codeword CQI in Group 0 of CSI part 2, these information can be treated as discardable information.

[0292] By placing at least one of the fourth feedback information indicating that the number of basis vector groups is the number of FD basis vector groups, the fifth feedback information indicating that the number of basis vectors is the number of FD basis vectors, the LI or LI combination, and the second codeword CQI in Group 1 of CSI part 2, these information can be treated as discardable information and discarded before the information in Group 0 of CSI part 2.

[0293] By placing the second codeword CQI in Group 2 of CSI part 2, the second codeword CQI can be used as the information to be discarded first.

[0294] Optionally, part of the second codeword CQI may be located in CSI part 1, and the other part may be located in CSI part 2.

[0295] For example, when the total rank number is greater than 4, the CSI report includes two CQIs (one for each codeword). The second CQI includes the wideband CQI, the odd subband CQI, and the even subband CQI. In this case, the second codeword CQI and the first codeword CQI can be placed in the CSI report according to any of the following:

[0296] The second codeword CQI and the first codeword CQI are both located in CSI part 1;

[0297] The second codeword CQI and the first codeword CQI are both located in CSI part 2;

[0298] The second codeword CQI is located in CSI part 2. Specifically, the wideband CQI is located in Group 0 of CSI part 2, the even subband CQI is located in Group 1 of CSI part 2, and the odd subband CQI is located in Group 2 of CSI part 2; or the second codeword CQI is located in Group 0 or Group 1 of CSI part 2.

[0299] As an optional implementation, Group0 of CSI part2 includes the first feedback information, the second feedback information, the fourth feedback information indicating that the number of basis vector groups is the number of SD basis vector groups, the fifth feedback information indicating that the number of basis vectors is the number of SD basis vectors, and the SCI; Group1 of CSI part2 includes the fourth feedback information indicating that the number of basis vector groups is the number of FD basis vector groups, and the fifth feedback information indicating that the number of basis vectors is the number of FD basis vectors; the LI or LI combination can be located in Group 1 of CSIPart 2; or, the LI or LI combination is located in Group0 of CSI part 2 or CSI part 1, so that even if the PMI is discarded, the LI or LI combination can also be combined with RI to obtain the strongest TRP information.

[0300] In an embodiment of the present application, the terminal sends a first CSI report to a network-side device, and the first CSI report includes at least one first target CSI information; wherein each first target CSI information is at least two items of the first CSI information, the second CSI information, and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource. Based on the same CSI reporting framework, at least two items of the CJT CSI, NCJT CSI, and STRP CSI can be flexibly reported, thereby reducing the CSI reporting resources when reporting at least two items of the CJT CSI, NCJT CSI, and STRP CSI. In addition, in a mixed scenario where part of the multiple TRPs performs CJT and the other part performs NCJT, at least two of the CSI of CJT, NCJT and STRP can be reported through a mixed report of the first target CSI information, which can more accurately reflect the CSI in the mixed scenario.

[0301] Please refer to Figure 4. Another CSI transmission method provided in an embodiment of the present application is executed by a network side device, which can be various types of network side devices 12 listed in Figure 1, or other types of network side devices other than the network side devices 12 listed in the embodiment shown in Figure 1, which are not specifically limited here.

[0302] As shown in FIG4 , the CSI transmission method may include the following steps:

[0303] Step 401: A network-side device receives a first CSI report from a terminal, where the first CSI report includes at least one first target CSI information;

[0304] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0305] It should be noted that, in the embodiment of the present application, the CSI transmission method executed by the network side device is specifically a method for the network side device to obtain the CSI information reported by the terminal. The steps and functions executed by the network side device correspond to the method for the terminal to report the CSI report in the method embodiment shown in Figure 2, and the network side device and the terminal execute their respective CSI transmission methods to jointly achieve the purpose of flexibly reporting at least two of the CSI of CJT, CSI of NCJT and CSI of STRP based on the same CSI reporting framework. The embodiment of the present application can achieve the same beneficial effects as the method embodiment shown in Figure 2. To avoid repetition, it will not be repeated here.

[0306] In addition, the first CSI report, the first target CSI information, the first CSI information, the second CSI information and the third CSI information, the CSI information of CJT, the CSI information of NCJT, and the CSI information obtained by one CSI-RS resource in the embodiment of the present application have the same meaning as the first CSI report, the first target CSI information, the first CSI information, the second CSI information and the third CSI information, the CSI information of CJT, the CSI information of NCJT, and the CSI information obtained by one CSI-RS resource in the method embodiment shown in Figure 2, and are not repeated here.

[0307] Optionally, the type of each first target CSI information includes any one of the following:

[0308] The first CSI information and the second CSI information, wherein the second CSI information includes NCJT CSI information obtained based on at least two of the first CSI information;

[0309] The second CSI information and the third CSI information, wherein the second CSI information includes CSI information of the NCJT obtained based on at least two pieces of the third CSI information;

[0310] The first CSI information, the second CSI information and the third CSI information, the second CSI information includes NCJT CSI information obtained based on at least one of the first CSI information and at least one of the third CSI information.

[0311] Optionally, the first CSI information is the CSI information of CJT obtained from different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained from CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

[0312] Optionally, the method further includes:

[0313] The network-side device sends CSI report configuration information and CSI-RS resource configuration information associated with the CSI report configuration information to the terminal;

[0314] The CSI-RS resource configuration information is used to configure K CSI-RS resource groups, where K is a positive integer.

[0315] Optionally, the CSI-RS resource configuration information includes at least one of the following:

[0316] Indication information of the number K of the CSI-RS resource groups;

[0317] CSI-RS resources included in each of the CSI-RS resource groups;

[0318] a first CSI-RS resource set, wherein the first CSI-RS resource set includes the K CSI-RS resource groups;

[0319] K CSI-RS resource sets, each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

[0320] Optionally, the network-side device receiving a first CSI report from a terminal includes:

[0321] In a case where the CSI report configuration information instructs the terminal to report at least two items of the first CSI information, the second CSI information, and the third CSI information, the network-side device receives a first CSI report from the terminal.

[0322] Optionally, the method further includes:

[0323] When the CSI reporting configuration information does not instruct the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI reporting configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI reporting configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information, and the third CSI information, the network-side device receives a second CSI report from the terminal, where the second CSI report includes at least one of the following:

[0324] at least one piece of first target CSI information;

[0325] At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information, and the third CSI information.

[0326] Optionally, the CSI report configuration information includes at least one of the following:

[0327] first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information is used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0328] second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information;

[0329] third indication information, the third indication information being used to indicate at least one first combination, the first combination including at least one CSI-RS resource group, the first combination being used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources within the CSI-RS resource group, the CSI-RS resource group corresponding to the target CSI information including one of the first combinations;

[0330] Fourth indication information, where the fourth indication information is used to indicate at least one of the following:

[0331] a type of at least one of the first target CSI information;

[0332] at least one piece of the first CSI information;

[0333] at least one piece of the second CSI information;

[0334] at least one of the third CSI information.

[0335] Optionally, the method further includes:

[0336] The network side device receives at least one of the following from the terminal:

[0337] first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information;

[0338] second feedback information, where the second feedback information indicates the CSI-RS resources in each of the CSI-RS resource groups corresponding to the target CSI information;

[0339] Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

[0340] Optionally, the method further includes:

[0341] The network-side device sends CSI interference measurement CSI-IM resource configuration information to the terminal, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding to any one of the following:

[0342] The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

[0343] Optionally, the target CSI information further includes at least one basis vector group, where the basis vector group includes at least one of a spatial domain SD basis vector group and a frequency domain FD basis vector group;

[0344] The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector groups includes at least one of the following:

[0345] Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group;

[0346] At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

[0347] Optionally, the method further includes:

[0348] The network-side device sends basis vector configuration information to the terminal, where the basis vector configuration information includes at least one of the following:

[0349] the number of the configured basis vector groups;

[0350] the number of basis vectors included in the basis vector group of each configuration;

[0351] A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following:

[0352] CSI-RS resources;

[0353] CSI-RS resource group.

[0354] Optionally, the target CSI information further includes at least one of the following:

[0355] Fourth feedback information, where the fourth feedback information is used to indicate the number of basis vector groups corresponding to the target CSI information;

[0356] Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

[0357] Optionally, in a case where the CSI-RS resource group corresponds one-to-one to the FD basis vector group, the target CSI information further includes multiple groups of offset values; wherein the multiple groups of offset values ​​correspond one-to-one to the CSI-RS resource group, and one group of offset values ​​is used to indicate the phase offset value of the FD basis vector between a first resource and a second resource in the corresponding CSI-RS resource group, where the second resource is a reference CSI-RS resource in the CSI-RS resource group, and the first resource is each CSI-RS resource in the CSI-RS resource group except the second resource; or,

[0358] In a case where the at least two or all CSI-RS resource groups correspond to the same FD basis vector group, the target CSI information further includes an offset value of the FD basis vector of a third resource compared to the FD basis vector of a fourth resource; wherein the fourth resource is a reference CSI-RS resource in the at least two or all CSI-RS resource groups, and the third resource is each CSI-RS resource in the at least two or all CSI-RS resource groups except the fourth resource.

[0359] Optionally, the target CSI information further includes a strongest coefficient indication SCI;

[0360] Among them, the SCI is used to indicate at least one of the following: the CSI-RS resource group to which the strongest compression coefficient belongs, the CSI-RS resource corresponding to the strongest compression coefficient, the SD basis vector corresponding to the strongest compression coefficient, and the FD basis vector corresponding to the strongest compression coefficient; the SCI corresponds one-to-one to the first target CSI-RS resource group; or, the same SCI corresponds to all of the first target CSI-RS resource groups; the first target CSI-RS resource group is a CSI-RS resource group that contains at least two CSI-RS resources in the CSI-RS resource group corresponding to the target CSI information.

[0361] Optionally, the target CSI information further includes at least one of the following:

[0362] Layer indication LI, LI combination, strongest CSI-RS resource group, rank indication RI, RI combination, channel quality indication CQI;

[0363] The RI combination includes M RI values, the M RI values ​​correspond one-to-one to the M CSI-RS resource groups corresponding to the target CSI information, and the strongest CSI-RS resource group is the CSI-RS resource group including the highest SINR layer among the M CSI-RS resource groups.

[0364] Optionally, the LI indicates a layer having the highest signal to interference plus noise ratio (SINR) in the target CSI information; or

[0365] The LIs in the LI combination respectively indicate the layer with the highest SINR in the second target CSI-RS resource group, wherein the second target CSI-RS resource group is the CSI-RS resource group with an RI value greater than 1 in the M CSI-RS resource groups.

[0366] Optionally, the CSI report configuration information further includes:

[0367] RI restriction information, wherein the K CSI-RS resource groups configured by the CSI-RS resource configuration information associated with the CSI report configuration information correspond one-to-one to the RI restriction information; or, all CSI-RS resource groups to which the CSI-RS resources corresponding to the target CSI information belong correspond to the same RI restriction information; or, different target CSI information corresponds to different RI restriction information.

[0368] Optionally, the UCI of the target CSI report includes a second part part2, and the part2 includes: a first information group Group0, a second information group Group1, and a third information group Group2;

[0369] Group 0 carries at least one of the following:

[0370] the first feedback information;

[0371] the second feedback information;

[0372] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of SD basis vector groups;

[0373] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of SD basis vectors;

[0374] Said SCI;

[0375] The LI or LI combination;

[0376] A second codeword CQI, wherein, when the total rank number is greater than a preset value, the second codeword CQI includes at least one of a wideband CQI, an odd subband CQI, and an even subband CQI;

[0377] Group 1 carries at least one of the following:

[0378] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of FD basis vector groups;

[0379] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of FD basis vectors;

[0380] The LI or LI combination;

[0381] the second codeword CQI;

[0382] Group 2 carries at least one of the following:

[0383] The second codeword CQI.

[0384] The various steps in the CSI transmission method performed by the network-side device in the embodiment of the present application correspond to the various steps in the CSI transmission method performed by the terminal in the method embodiment as shown in FIG2 , and the embodiment of the present application can achieve the same beneficial effects as the method embodiment as shown in FIG2 . To avoid repetition, they are not described here.

[0385] The CSI transmission method provided in the embodiment of the present application may be executed by a CSI transmission device. In the embodiment of the present application, the CSI transmission device provided in the embodiment of the present application is described by taking the CSI transmission method performed by the CSI transmission device as an example.

[0386] Referring to FIG. 5 , the CSI transmission device 500 provided in an embodiment of the present application may be a device within a terminal. As shown in FIG. 5 , the CSI transmission device 500 may include the following modules:

[0387] A first sending module 501 is configured to send a first CSI report to a network-side device, where the first CSI report includes at least one first target CSI information;

[0388] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0389] Optionally, the type of each first target CSI information includes any one of the following:

[0390] The first CSI information and the second CSI information, wherein the second CSI information includes NCJT CSI information obtained based on at least two of the first CSI information;

[0391] The second CSI information and the third CSI information, wherein the second CSI information includes CSI information of the NCJT obtained based on at least two pieces of the third CSI information;

[0392] The first CSI information, the second CSI information and the third CSI information, the second CSI information includes NCJT CSI information obtained based on at least one of the first CSI information and at least one of the third CSI information.

[0393] Optionally, the first CSI information is the CSI information of CJT obtained from different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained from CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

[0394] Optionally, the CSI transmission device 500 further includes:

[0395] The first acquisition module is configured to acquire CSI report configuration information and CSI-RS resource configuration information associated with the CSI report configuration information, wherein the CSI-RS resource configuration information is used to configure K CSI-RS resource groups, where K is a positive integer.

[0396] Optionally, the CSI-RS resource configuration information includes at least one of the following:

[0397] Indication information of the number K of the CSI-RS resource groups;

[0398] CSI-RS resources included in each of the CSI-RS resource groups;

[0399] a first CSI-RS resource set, wherein the first CSI-RS resource set includes the K CSI-RS resource groups;

[0400] K CSI-RS resource sets, each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

[0401] Optionally, the first sending module 501 is specifically configured to:

[0402] In a case where the CSI report configuration information instructs the terminal to report at least two items of the first CSI information, the second CSI information, and the third CSI information, a first CSI report is sent to the network-side device.

[0403] Optionally, the CSI transmission device 500 further includes:

[0404] a second sending module, configured to, when the CSI report configuration information does not instruct the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI report configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI report configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information, and the third CSI information, send a second CSI report to the network-side device, where the second CSI report includes at least one of the following:

[0405] at least one piece of first target CSI information;

[0406] At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information, and the third CSI information.

[0407] Optionally, the CSI report configuration information includes at least one of the following:

[0408] first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information is used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0409] second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information;

[0410] third indication information, the third indication information being used to indicate at least one first combination, the first combination including at least one CSI-RS resource group, the first combination being used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources within the CSI-RS resource group, the CSI-RS resource group corresponding to the target CSI information including one of the first combinations;

[0411] Fourth indication information, where the fourth indication information is used to indicate at least one of the following:

[0412] a type of at least one of the first target CSI information;

[0413] at least one piece of the first CSI information;

[0414] at least one piece of the second CSI information;

[0415] at least one of the third CSI information.

[0416] Optionally, the CSI transmission device 500 further includes:

[0417] A determination module is used to determine M CSI-RS resource groups corresponding to the target CSI information from the K CSI-RS resource groups, where M is a positive integer less than or equal to K, and the target CSI information includes any one of the first target CSI information and the second target CSI information.

[0418] Optionally, the M CSI-RS resource groups include one of the following:

[0419] a first CSI-RS resource group;

[0420] a second CSI-RS resource group;

[0421] at least two first CSI-RS resource groups;

[0422] at least two second CSI-RS resource groups;

[0423] at least one first CSI-RS resource group and at least one second CSI-RS resource group;

[0424] The first CSI-RS resource group includes at least two CSI-RS resources, and the second CSI-RS resource group includes one CSI-RS resource.

[0425] Optionally, the CSI transmission device 500 further includes:

[0426] The third sending module is configured to send at least one of the following to the network side device:

[0427] first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information;

[0428] second feedback information, where the second feedback information indicates the CSI-RS resources in each of the CSI-RS resource groups corresponding to the target CSI information;

[0429] Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

[0430] Optionally, the CSI transmission device 500 further includes:

[0431] The second receiving module is configured to receive CSI interference measurement (CSI-IM) resource configuration information from a network-side device, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding to any one of the following:

[0432] The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

[0433] Optionally, the target CSI information further includes at least one basis vector group, where the basis vector group includes at least one of a spatial domain SD basis vector group and a frequency domain FD basis vector group, and the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0434] The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector group includes at least one of the following:

[0435] Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group;

[0436] At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

[0437] Optionally, the CSI transmission device 500 further includes:

[0438] The third receiving module is configured to receive basis vector configuration information from a network-side device, where the basis vector configuration information includes at least one of the following:

[0439] the number of the configured basis vector groups;

[0440] the number of basis vectors included in the basis vector group of each configuration;

[0441] A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following:

[0442] CSI-RS resources;

[0443] CSI-RS resource group.

[0444] Optionally, the target CSI information further includes at least one of the following:

[0445] Fourth feedback information, where the fourth feedback information is used to indicate the number of basis vector groups corresponding to the target CSI information;

[0446] Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

[0447] Optionally, in a case where the CSI-RS resource group corresponds one-to-one to the FD basis vector group, the target CSI information further includes multiple groups of offset values; wherein the multiple groups of offset values ​​correspond one-to-one to the CSI-RS resource group, and one group of offset values ​​is used to indicate the phase offset value of the FD basis vector between a first resource and a second resource in the corresponding CSI-RS resource group, where the second resource is a reference CSI-RS resource in the CSI-RS resource group, and the first resource is each CSI-RS resource in the CSI-RS resource group except the second resource; or,

[0448] In a case where the at least two or all CSI-RS resource groups correspond to the same FD basis vector group, the target CSI information further includes an offset value of the FD basis vector of a third resource compared to the FD basis vector of a fourth resource; wherein the fourth resource is a reference CSI-RS resource in the at least two or all CSI-RS resource groups, and the third resource is each CSI-RS resource in the at least two or all CSI-RS resource groups except the fourth resource.

[0449] Optionally, the target CSI information further includes a strongest coefficient indication SCI;

[0450] Among them, the SCI is used to indicate at least one of the following: the CSI-RS resource group to which the strongest compression coefficient belongs, the CSI-RS resource corresponding to the strongest compression coefficient, the SD basis vector corresponding to the strongest compression coefficient, and the FD basis vector corresponding to the strongest compression coefficient; the SCI corresponds one-to-one to the first target CSI-RS resource group; or, the same SCI corresponds to all of the first target CSI-RS resource groups; the first target CSI-RS resource group is a CSI-RS resource group that contains at least two CSI-RS resources in the CSI-RS resource group corresponding to the target CSI information.

[0451] Optionally, the number of CSI processing units CPU used to process the CSI report is related to at least one of the following: the number K of configured CSI-RS resource groups, the number of CSI-RS resources contained in each CSI-RS resource group, the number of target CSI information, and the number of the first combinations.

[0452] Optionally, the target CSI information further includes at least one of the following:

[0453] Layer indication LI, LI combination, strongest CSI-RS resource group, rank indication RI, RI combination, channel quality indication CQI;

[0454] The RI combination includes M RI values, the M RI values ​​correspond one-to-one to the M CSI-RS resource groups corresponding to the target CSI information, and the strongest CSI-RS resource group is the CSI-RS resource group including the highest SINR layer among the M CSI-RS resource groups.

[0455] Optionally, the LI indicates a layer having the highest signal to interference plus noise ratio (SINR) in the target CSI information; or

[0456] The LIs in the LI combination respectively indicate the layer with the highest SINR in the second target CSI-RS resource group, wherein the second target CSI-RS resource group is the CSI-RS resource group with an RI value greater than 1 in the M CSI-RS resource groups.

[0457] Optionally, the CSI report configuration information further includes:

[0458] RI restriction information, wherein the K CSI-RS resource groups configured by the CSI-RS resource configuration information associated with the CSI report configuration information correspond one-to-one to the RI restriction information; or, all CSI-RS resource groups to which the CSI-RS resources corresponding to the target CSI information belong correspond to the same RI restriction information; or, different target CSI information corresponds to different RI restriction information.

[0459] Optionally, the UCI of the target CSI information includes a second part part2, and the part2 includes: a first information group Group0, a second information group Group1, and a third information group Group2;

[0460] Group 0 carries at least one of the following:

[0461] the first feedback information;

[0462] the second feedback information;

[0463] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of SD basis vector groups;

[0464] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of SD basis vectors;

[0465] Said SCI;

[0466] The LI or LI combination;

[0467] A second codeword CQI, wherein, when the total rank number is greater than a preset value, the second codeword CQI includes at least one of a wideband CQI, an odd subband CQI, and an even subband CQI;

[0468] Group 1 carries at least one of the following:

[0469] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of FD basis vector groups;

[0470] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of FD basis vectors;

[0471] The LI or LI combination;

[0472] the second codeword CQI;

[0473] Group 2 carries at least one of the following:

[0474] The second codeword CQI.

[0475] The CSI transmission device 500 provided in the embodiment of the present application can implement each process implemented in the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0476] Referring to FIG. 6 , the CSI transmission apparatus 600 provided in an embodiment of the present application may be a device within a network-side device. As shown in FIG. 6 , the CSI transmission apparatus 600 may include the following modules:

[0477] A first receiving module 601 is configured to receive a first CSI report from a terminal, where the first CSI report includes at least one first target CSI information;

[0478] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0479] Optionally, the type of each first target CSI information includes any one of the following:

[0480] The first CSI information and the second CSI information, wherein the second CSI information includes NCJT CSI information obtained based on at least two of the first CSI information;

[0481] The second CSI information and the third CSI information, wherein the second CSI information includes CSI information of the NCJT obtained based on at least two pieces of the third CSI information;

[0482] The first CSI information, the second CSI information and the third CSI information, the second CSI information includes NCJT CSI information obtained based on at least one of the first CSI information and at least one of the third CSI information.

[0483] Optionally, the first CSI information is the CSI information of CJT obtained by different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained by CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

[0484] Optionally, the CSI transmission device 600 further includes:

[0485] a fourth sending module, configured to send CSI report configuration information and CSI-RS resource configuration information associated with the CSI report configuration information to the terminal;

[0486] The CSI-RS resource configuration information is used to configure K CSI-RS resource groups, where K is a positive integer.

[0487] Optionally, the CSI-RS resource configuration information includes at least one of the following:

[0488] Indication information of the number K of the CSI-RS resource groups;

[0489] CSI-RS resources included in each of the CSI-RS resource groups;

[0490] a first CSI-RS resource set, wherein the first CSI-RS resource set includes the K CSI-RS resource groups;

[0491] K CSI-RS resource sets, each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

[0492] Optionally, the first receiving module 601 is specifically configured to:

[0493] In a case where the CSI report configuration information instructs the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, a first CSI report from the terminal is received.

[0494] Optionally, the CSI transmission device 600 further includes:

[0495] a fourth receiving module, configured to, when the CSI report configuration information does not instruct the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI report configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI report configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information, and the third CSI information, receive, by the network-side device, a second CSI report from the terminal, where the second CSI report includes at least one of the following:

[0496] at least one piece of first target CSI information;

[0497] At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information, and the third CSI information.

[0498] Optionally, the CSI report configuration information includes at least one of the following:

[0499] first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information is used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0500] second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information;

[0501] third indication information, the third indication information being used to indicate at least one first combination, the first combination including at least one CSI-RS resource group, the first combination being used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources within the CSI-RS resource group, the CSI-RS resource group corresponding to the target CSI information including one of the first combinations;

[0502] Fourth indication information, where the fourth indication information is used to indicate at least one of the following:

[0503] a type of at least one of the first target CSI information;

[0504] at least one piece of the first CSI information;

[0505] at least one piece of the second CSI information;

[0506] at least one of the third CSI information.

[0507] Optionally, the CSI transmission device 600 further includes:

[0508] A fifth receiving module is configured to receive at least one of the following from the terminal:

[0509] first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information;

[0510] second feedback information, where the second feedback information indicates the CSI-RS resources in each of the CSI-RS resource groups corresponding to the target CSI information;

[0511] Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

[0512] Optionally, the CSI transmission device 600 further includes:

[0513] a fifth sending module, configured to send CSI interference measurement CSI-IM resource configuration information to the terminal, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding one-to-one to any one of the following items:

[0514] The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

[0515] Optionally, the target CSI information further includes at least one basis vector group, where the basis vector group includes at least one of a spatial domain SD basis vector group and a frequency domain FD basis vector group;

[0516] The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector groups includes at least one of the following:

[0517] Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group;

[0518] At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

[0519] Optionally, the CSI transmission device 600 further includes:

[0520] a sixth sending module, configured to send basis vector configuration information to the terminal, where the basis vector configuration information includes at least one of the following:

[0521] the number of the configured basis vector groups;

[0522] the number of basis vectors included in the basis vector group of each configuration;

[0523] A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following:

[0524] CSI-RS resources;

[0525] CSI-RS resource group.

[0526] Optionally, the target CSI information further includes at least one of the following:

[0527] Fourth feedback information, where the fourth feedback information is used to indicate the number of basis vector groups corresponding to the target CSI information;

[0528] Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

[0529] Optionally, in a case where the CSI-RS resource group corresponds one-to-one to the FD basis vector group, the target CSI information further includes multiple groups of offset values; wherein the multiple groups of offset values ​​correspond one-to-one to the CSI-RS resource group, and one group of offset values ​​is used to indicate the phase offset value of the FD basis vector between a first resource and a second resource in the corresponding CSI-RS resource group, where the second resource is a reference CSI-RS resource in the CSI-RS resource group, and the first resource is each CSI-RS resource in the CSI-RS resource group except the second resource; or,

[0530] In a case where the at least two or all CSI-RS resource groups correspond to the same FD basis vector group, the target CSI information further includes an offset value of the FD basis vector of a third resource compared to the FD basis vector of a fourth resource; wherein the fourth resource is a reference CSI-RS resource in the at least two or all CSI-RS resource groups, and the third resource is each CSI-RS resource in the at least two or all CSI-RS resource groups except the fourth resource.

[0531] Optionally, the target CSI information further includes a strongest coefficient indication SCI;

[0532] Among them, the SCI is used to indicate at least one of the following: the CSI-RS resource group to which the strongest compression coefficient belongs, the CSI-RS resource corresponding to the strongest compression coefficient, the SD basis vector corresponding to the strongest compression coefficient, and the FD basis vector corresponding to the strongest compression coefficient; the SCI corresponds one-to-one to the first target CSI-RS resource group; or, the same SCI corresponds to all of the first target CSI-RS resource groups; the first target CSI-RS resource group is a CSI-RS resource group that contains at least two CSI-RS resources in the CSI-RS resource group corresponding to the target CSI information.

[0533] Optionally, the target CSI information further includes at least one of the following:

[0534] Layer indication LI, LI combination, strongest CSI-RS resource group, rank indication RI, RI combination, channel quality indication CQI;

[0535] The RI combination includes M RI values, the M RI values ​​correspond one-to-one to the M CSI-RS resource groups corresponding to the target CSI information, and the strongest CSI-RS resource group is the CSI-RS resource group including the highest SINR layer among the M CSI-RS resource groups.

[0536] Optionally, the LI indicates a layer having the highest signal to interference plus noise ratio (SINR) in the target CSI information; or

[0537] The LIs in the LI combination respectively indicate the layer with the highest SINR in the second target CSI-RS resource group, wherein the second target CSI-RS resource group is the CSI-RS resource group with an RI value greater than 1 in the M CSI-RS resource groups.

[0538] Optionally, the CSI report configuration information further includes:

[0539] RI restriction information, wherein the K CSI-RS resource groups configured by the CSI-RS resource configuration information associated with the CSI report configuration information correspond one-to-one to the RI restriction information; or, all CSI-RS resource groups to which the CSI-RS resources corresponding to the target CSI information belong correspond to the same RI restriction information; or, different target CSI information corresponds to different RI restriction information.

[0540] Optionally, the UCI of the target CSI report includes a second part part2, and the part2 includes: a first information group Group0, a second information group Group1, and a third information group Group2;

[0541] Group 0 carries at least one of the following:

[0542] the first feedback information;

[0543] the second feedback information;

[0544] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of SD basis vector groups;

[0545] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of SD basis vectors;

[0546] Said SCI;

[0547] The LI or LI combination;

[0548] A second codeword CQI, wherein, when the total rank number is greater than a preset value, the second codeword CQI includes at least one of a wideband CQI, an odd subband CQI, and an even subband CQI;

[0549] Group 1 carries at least one of the following:

[0550] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of FD basis vector groups;

[0551] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of FD basis vectors;

[0552] The LI or LI combination;

[0553] the second codeword CQI;

[0554] Group 2 carries at least one of the following:

[0555] The second codeword CQI.

[0556] The CSI transmission device 600 provided in the embodiment of the present application can implement each process implemented in the method embodiment shown in Figure 4 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0557] The CSI transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or a network-side device. For example, the terminal can include, but is not limited to, the types of terminal 11 listed above, and the network-side device can include, but is not limited to, the types of access network devices listed above, etc., and the embodiments of the present application do not specifically limit this.

[0558] As shown in Figure 7, an embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702. The memory 702 stores a program or instruction that can be executed on the processor 701. For example, when the communication device 700 is a terminal, the program or instruction, when executed by the processor 701, implements the various steps of the CSI transmission method embodiment shown in Figure 2 and can achieve the same technical effect. When the communication device 700 is a network-side device, the program or instruction, when executed by the processor 701, implements the various steps of the CSI transmission method embodiment shown in Figure 4 and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0559] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG2 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG8 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0560] The terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809 and at least some of the components of the processor 810.

[0561] Those skilled in the art will appreciate that the terminal 800 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 810 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG8 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0562] It should be understood that in an embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processor 8041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0563] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 801 may transmit the data to the processor 810 for processing. Furthermore, the radio frequency unit 801 may send uplink data to the network-side device. Typically, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0564] The memory 809 can be used to store software programs or instructions and various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 809 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0565] Processor 810 may include one or more processing units. Optionally, processor 810 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 810.

[0566] The radio frequency unit 801 is configured to send a first CSI report to a network-side device, where the first CSI report includes at least one first target CSI information;

[0567] Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; and the third CSI information is the CSI information obtained by one CSI-RS resource.

[0568] Optionally, the type of each first target CSI information includes any one of the following:

[0569] The first CSI information and the second CSI information, wherein the second CSI information includes NCJT CSI information obtained based on at least two of the first CSI information;

[0570] The second CSI information and the third CSI information, wherein the second CSI information includes CSI information of the NCJT obtained based on at least two pieces of the third CSI information;

[0571] The first CSI information, the second CSI information and the third CSI information, the second CSI information includes NCJT CSI information obtained based on at least one of the first CSI information and at least one of the third CSI information.

[0572] Optionally, the first CSI information is the CSI information of CJT obtained from different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained from CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

[0573] Optionally, the radio frequency unit 801 is further used to obtain CSI report configuration information and CSI-RS resource configuration information associated with the CSI report configuration information, wherein the CSI-RS resource configuration information is used to configure K CSI-RS resource groups, and K is a positive integer.

[0574] Optionally, the CSI-RS resource configuration information includes at least one of the following:

[0575] Indication information of the number K of the CSI-RS resource groups;

[0576] CSI-RS resources included in each of the CSI-RS resource groups;

[0577] a first CSI-RS resource set, wherein the first CSI-RS resource set includes the K CSI-RS resource groups;

[0578] K CSI-RS resource sets, each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

[0579] Optionally, the sending of the first CSI report to the network-side device by the radio frequency unit 801 includes:

[0580] In a case where the CSI report configuration information instructs the terminal to report at least two items of the first CSI information, the second CSI information, and the third CSI information, a first CSI report is sent to the network-side device.

[0581] Optionally, the radio frequency unit 801 is further configured to:

[0582] When the CSI reporting configuration information does not instruct the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI reporting configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information, and the third CSI information, or when the CSI reporting configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information, and the third CSI information, the terminal sends a second CSI report to the network-side device, where the second CSI report includes at least one of the following:

[0583] at least one piece of first target CSI information;

[0584] At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information, and the third CSI information.

[0585] Optionally, the CSI report configuration information includes at least one of the following:

[0586] first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information is used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0587] second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information;

[0588] third indication information, the third indication information being used to indicate at least one first combination, the first combination including at least one CSI-RS resource group, the first combination being used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources within the CSI-RS resource group, the CSI-RS resource group corresponding to the target CSI information including one of the first combinations;

[0589] Fourth indication information, where the fourth indication information is used to indicate at least one of the following:

[0590] a type of at least one of the first target CSI information;

[0591] at least one piece of the first CSI information;

[0592] at least one piece of the second CSI information;

[0593] at least one of the third CSI information.

[0594] Optionally, the processor 810 is used to determine M CSI-RS resource groups corresponding to the target CSI information from the K CSI-RS resource groups, where M is a positive integer less than or equal to K, and the target CSI information includes any one of the first target CSI information and the second target CSI information.

[0595] Optionally, the M CSI-RS resource groups include one of the following:

[0596] a first CSI-RS resource group;

[0597] a second CSI-RS resource group;

[0598] at least two first CSI-RS resource groups;

[0599] at least two second CSI-RS resource groups;

[0600] at least one first CSI-RS resource group and at least one second CSI-RS resource group;

[0601] The first CSI-RS resource group includes at least two CSI-RS resources, and the second CSI-RS resource group includes one CSI-RS resource.

[0602] Optionally, the radio frequency unit 801 is further configured to send at least one of the following to the network side device:

[0603] first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information;

[0604] second feedback information, where the second feedback information indicates the CSI-RS resources in each of the CSI-RS resource groups corresponding to the target CSI information;

[0605] Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

[0606] Optionally, the radio frequency unit 801 is further configured to receive CSI interference measurement (CSI-IM) resource configuration information from a network-side device, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding to any one of the following:

[0607] The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

[0608] Optionally, the target CSI information further includes at least one basis vector group, where the basis vector group includes at least one of a spatial domain SD basis vector group and a frequency domain FD basis vector group, and the target CSI information includes any one of the first target CSI information and the second target CSI information;

[0609] The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector group includes at least one of the following:

[0610] Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group;

[0611] At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

[0612] Optionally, the radio frequency unit 801 is further configured to receive basis vector configuration information from a network-side device, where the basis vector configuration information includes at least one of the following:

[0613] The number of the configured basis vector groups;

[0614] the number of basis vectors included in the basis vector group of each configuration;

[0615] A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following:

[0616] CSI-RS resources;

[0617] CSI-RS resource group.

[0618] Optionally, the target CSI information further includes at least one of the following:

[0619] Fourth feedback information, where the fourth feedback information is used to indicate the number of basis vector groups corresponding to the target CSI information;

[0620] Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

[0621] Optionally, in a case where the CSI-RS resource group corresponds one-to-one to the FD basis vector group, the target CSI information further includes multiple groups of offset values; wherein the multiple groups of offset values ​​correspond one-to-one to the CSI-RS resource group, and one group of offset values ​​is used to indicate the phase offset value of the FD basis vector between a first resource and a second resource in the corresponding CSI-RS resource group, where the second resource is a reference CSI-RS resource in the CSI-RS resource group, and the first resource is each CSI-RS resource in the CSI-RS resource group except the second resource; or,

[0622] In a case where the at least two or all CSI-RS resource groups correspond to the same FD basis vector group, the target CSI information further includes an offset value of the FD basis vector of a third resource compared to the FD basis vector of a fourth resource; wherein the fourth resource is a reference CSI-RS resource in the at least two or all CSI-RS resource groups, and the third resource is each CSI-RS resource in the at least two or all CSI-RS resource groups except the fourth resource.

[0623] Optionally, the target CSI information further includes a strongest coefficient indication SCI;

[0624] Among them, the SCI is used to indicate at least one of the following: the CSI-RS resource group to which the strongest compression coefficient belongs, the CSI-RS resource corresponding to the strongest compression coefficient, the SD basis vector corresponding to the strongest compression coefficient, and the FD basis vector corresponding to the strongest compression coefficient; the SCI corresponds one-to-one to the first target CSI-RS resource group; or, the same SCI corresponds to all of the first target CSI-RS resource groups; the first target CSI-RS resource group is a CSI-RS resource group that contains at least two CSI-RS resources in the CSI-RS resource group corresponding to the target CSI information.

[0625] Optionally, the number of CSI processing units CPU used to process the CSI report is related to at least one of the following: the number K of configured CSI-RS resource groups, the number of CSI-RS resources contained in each CSI-RS resource group, the number of target CSI information, and the number of the first combinations.

[0626] Optionally, the target CSI information further includes at least one of the following:

[0627] Layer indication LI, LI combination, strongest CSI-RS resource group, rank indication RI, RI combination, channel quality indication CQI;

[0628] The RI combination includes M RI values, the M RI values ​​correspond one-to-one to the M CSI-RS resource groups corresponding to the target CSI information, and the strongest CSI-RS resource group is the CSI-RS resource group including the highest SINR layer among the M CSI-RS resource groups.

[0629] Optionally, the LI indicates a layer having the highest signal to interference plus noise ratio (SINR) in the target CSI information; or

[0630] The LIs in the LI combination respectively indicate the layer with the highest SINR in the second target CSI-RS resource group, wherein the second target CSI-RS resource group is the CSI-RS resource group with an RI value greater than 1 in the M CSI-RS resource groups.

[0631] Optionally, the CSI report configuration information further includes:

[0632] RI restriction information, wherein the K CSI-RS resource groups configured by the CSI-RS resource configuration information associated with the CSI report configuration information correspond one-to-one to the RI restriction information; or, all CSI-RS resource groups to which the CSI-RS resources corresponding to the target CSI information belong correspond to the same RI restriction information; or, different target CSI information corresponds to different RI restriction information.

[0633] Optionally, the UCI of the target CSI information includes a second part part2, and the part2 includes: a first information group Group0, a second information group Group1, and a third information group Group2;

[0634] Group 0 carries at least one of the following:

[0635] the first feedback information;

[0636] the second feedback information;

[0637] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of SD basis vector groups;

[0638] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of SD basis vectors;

[0639] Said SCI;

[0640] The LI or LI combination;

[0641] A second codeword CQI, wherein, when the total rank number is greater than a preset value, the second codeword CQI includes at least one of a wideband CQI, an odd subband CQI, and an even subband CQI;

[0642] Group 1 carries at least one of the following:

[0643] The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of FD basis vector groups;

[0644] The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of FD basis vectors;

[0645] The LI or LI combination;

[0646] the second codeword CQI;

[0647] Group 2 carries at least one of the following:

[0648] The second codeword CQI.

[0649] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the CSI transmission method embodiment shown in Figure 2, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0650] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG4 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0651] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 9, the network-side device 900 includes an antenna 901, a radio frequency device 902, a baseband device 903, a processor 904, and a memory 905. Antenna 901 is connected to radio frequency device 902. In the uplink direction, radio frequency device 902 receives information via antenna 901 and sends the received information to baseband device 903 for processing. In the downlink direction, baseband device 903 processes the information to be transmitted and sends it to radio frequency device 902. Radio frequency device 902 processes the received information and then sends it through antenna 901.

[0652] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 903 , which includes a baseband processor.

[0653] The baseband device 903 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 9, one of which is, for example, a baseband processor, which is connected to the memory 905 through a bus interface to call the program in the memory 905 and execute the network device operations shown in the above method embodiment.

[0654] The network side device may further include a network interface 906, which is, for example, a Common Public Radio Interface (CPRI).

[0655] Specifically, the network side device 900 of the embodiment of the present application also includes: instructions or programs stored in the memory 905 and can be run on the processor 904. The processor 904 calls the instructions or programs in the memory 905 to execute the method of execution of each module shown in Figure 6 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0656] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the method embodiment shown in Figure 2 or Figure 4 are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0657] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0658] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the method embodiment shown in Figure 2 or Figure 4, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0659] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0660] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the method embodiment shown in Figure 2 or Figure 4, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0661] An embodiment of the present application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the CSI transmission method shown in Figure 2, and the network-side device can be used to execute the steps of the CSI transmission method shown in Figure 4.

[0662] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0663] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0664] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A channel state information (CSI) transmission method, comprising: The terminal sends a first CSI report to the network side device, where the first CSI report includes at least one first target CSI information; Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; the third CSI information is the CSI information obtained by one CSI-RS resource.

2. The method according to claim 1, wherein: The type of each of the first target CSI information includes any one of the following: The first CSI information and the second CSI information, wherein the second CSI information includes CSI information of NCJT obtained based on at least two of the first CSI information; The second CSI information and the third CSI information, wherein the second CSI information includes CSI information of NCJT obtained based on at least two of the third CSI information; The first CSI information, the second CSI information and the third CSI information, the second CSI information includes CSI information of NCJT obtained based on at least one of the first CSI information and at least one of the third CSI information.

3. The method according to claim 1 or 2, wherein: The first CSI information is the CSI information of CJT obtained from different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained from CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

4. The method according to claim 3, further comprising: The terminal obtains CSI report configuration information and CSI-RS resource configuration information associated with the CSI report configuration information, wherein the CSI-RS resource configuration information is used to configure K of the CSI-RS resource groups, where K is a positive integer.

5. The method according to claim 4, wherein: The CSI-RS resource configuration information includes at least one of the following: Indication information of the number K of the CSI-RS resource groups; CSI-RS resources included in each of the CSI-RS resource groups; A first CSI-RS resource set, wherein the first CSI-RS resource set includes the K CSI-RS resource groups; K CSI-RS resource sets, each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

6. The method according to claim 4 or 5, wherein: The terminal sends a first CSI report to the network side device, including: In a case where the CSI report configuration information instructs the terminal to report at least two of the first CSI information, the second CSI information, and the third CSI information, the terminal sends a first CSI report to the network side device.

7. The method according to any one of claims 4 to 6, further comprising: The CSI report configuration information does not instruct the terminal to report the first CSI information and the second CSI information and the third CSI information, or, in the case where the CSI report configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information and the third CSI information, or, in the case where the CSI report configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information and the third CSI information, the terminal sends a second CSI report to the network side device, and the second CSI report includes at least one of the following: at least one of the first target CSI information; At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information and the third CSI information.

8. The method according to any one of claims 4 to 7, wherein: The CSI report configuration information includes at least one of the following: first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information; second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information; third indication information, the third indication information being used to indicate at least one first combination, the first combination including at least one of the CSI-RS resource groups, the first combination being used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources within the CSI-RS resource group, the CSI-RS resource group corresponding to the target CSI information including one of the first combinations; The fourth indication information is used to indicate at least one of the following: at least one type of the first target CSI information; at least one of the first CSI information; at least one of the second CSI information; At least one of the third CSI information.

9. The method according to any one of claims 4 to 8, further comprising: The terminal determines M CSI-RS resource groups corresponding to the target CSI information from the K CSI-RS resource groups, where M is a positive integer less than or equal to K, and the target CSI information includes any one of the first target CSI information and the second target CSI information.

10. The method according to claim 9, wherein: The M CSI-RS resource groups include one of the following: a first CSI-RS resource group; a second CSI-RS resource group; at least two first CSI-RS resource groups; at least two second CSI-RS resource groups; at least one first CSI-RS resource group and at least one second CSI-RS resource group; The first CSI-RS resource group includes at least two CSI-RS resources, and the second CSI-RS resource group includes Includes a CSI-RS resource.

11. The method according to any one of claims 3 to 10, further comprising: The terminal sends at least one of the following to the network side device: first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information; second feedback information, where the second feedback information indicates the CSI-RS resource in each of the CSI-RS resource groups corresponding to the target CSI information; Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

12. The method according to any one of claims 1 to 11, further comprising: The terminal receives CSI interference measurement CSI-IM resource configuration information from a network side device, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding to any one of the following items: The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

13. The method according to any one of claims 1 to 12, wherein: The target CSI information further includes at least one basis vector group, the basis vector group includes at least one of a spatial domain SD basis vector group and a frequency domain FD basis vector group, and the target CSI information includes any one of the first target CSI information and the second target CSI information; The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector group includes at least one of the following: Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group; At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

14. The method according to claim 13, further comprising: The terminal receives base vector configuration information from a network side device, where the base vector configuration information includes at least one of the following: the number of the configured basis vector groups; the number of basis vectors included in the basis vector group for each configuration; A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following: CSI-RS resources; CSI-RS resource group.

15. The method according to claim 14, wherein: The target CSI information also includes at least one of the following: fourth feedback information, where the fourth feedback information is used to indicate the number of the basis vector groups corresponding to the target CSI information; Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

16. The method of claim 15, wherein: In the case where the CSI-RS resource group corresponds to the FD basis vector group one-to-one, the target CSI information further includes multiple groups of offset values; wherein the multiple groups of offset values ​​correspond to the CSI-RS resource group one-to-one, and one group of the offset values ​​is used to indicate the phase offset value of the FD basis vector between the first resource and the second resource in the corresponding CSI-RS resource group, respectively, the second resource is a reference CSI-RS resource in the CSI-RS resource group, and the first resource is each CSI-RS resource in the CSI-RS resource group except the second resource; or, In the case that the at least two or all CSI-RS resource groups correspond to the same FD basis vector group, the target CSI information also includes an offset value of the FD basis vector of the third resource compared to the FD basis vector of the fourth resource; wherein the fourth resource is a reference CSI-RS resource in the at least two or all CSI-RS resource groups, and the third resource is each CSI-RS resource in the at least two or all CSI-RS resource groups except the fourth resource.

17. The method according to any one of claims 1 to 16, wherein: The target CSI information also includes the strongest coefficient indication SCI; Among them, the SCI is used to indicate at least one of the following: the CSI-RS resource group to which the strongest compression coefficient belongs, the CSI-RS resource corresponding to the strongest compression coefficient, the SD basis vector corresponding to the strongest compression coefficient, and the FD basis vector corresponding to the strongest compression coefficient; the SCI corresponds one-to-one to the first target CSI-RS resource group; or, the same SCI corresponds to all of the first target CSI-RS resource groups; the first target CSI-RS resource group is a CSI-RS resource group that contains at least two CSI-RS resources in the CSI-RS resource group corresponding to the target CSI information.

18. The method according to any one of claims 1 to 17, wherein: The target CSI information also includes at least one of the following: Layer indication LI, LI combination, strongest CSI-RS resource group, rank indication RI, RI combination, channel quality indication CQI; The RI combination includes M RI values, the M RI values ​​correspond one-to-one to the M CSI-RS resource groups corresponding to the target CSI information, and the strongest CSI-RS resource group is the CSI-RS resource group containing the highest SINR layer among the M CSI-RS resource groups.

19. The method according to claim 18, wherein: The LI indicates the layer with the highest signal to interference plus noise ratio SINR in the target CSI information; or, The LIs in the LI combination respectively indicate the layers with the highest SINR in the second target CSI-RS resource group, wherein the second target CSI-RS resource group is a CSI-RS resource group having an RI value greater than 1 among the M CSI-RS resource groups.

20. The method according to claim 18 or 19, wherein: The CSI report configuration information also includes: RI restriction information, wherein the K CSI-RS resource groups configured by the CSI-RS resource configuration information associated with the CSI report configuration information correspond one-to-one to the RI restriction information; or, all CSI-RS resource groups to which the CSI-RS resources corresponding to the target CSI information belong correspond to the same RI restriction information; or, different target CSI information corresponds to different RI restriction information.

21. The method according to any one of claims 1 to 20, wherein: The UCI of the target CSI information includes a second part part2, wherein the part2 includes: a first information group Group0, a second information group Group1 and a third information group Group2; The Group0 carries at least one of the following: the first feedback information; the second feedback information; The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of SD basis vector groups; The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of SD basis vectors; The SCI; The LI or LI combination; A second codeword CQI, wherein, when the total rank number is greater than a preset value, the second codeword CQI includes at least one of a wideband CQI, an odd subband CQI, and an even subband CQI; The Group1 carries at least one of the following: The fourth feedback information, wherein the number of basis vector groups indicated by the fourth feedback information is the number of FD basis vector groups; The fifth feedback information, wherein the number of basis vectors indicated by the fifth feedback information is the number of FD basis vectors; The LI or LI combination; the second codeword CQI; The Group2 carries at least one of the following: The second codeword CQI.

22. A channel state information (CSI) transmission method, comprising: The network side device receives a first CSI report from the terminal, where the first CSI report includes at least one first target CSI information; Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; the third CSI information is the CSI information obtained by one CSI-RS resource.

23. The method according to claim 22, wherein: The type of each of the first target CSI information includes any one of the following: The first CSI information and the second CSI information, wherein the second CSI information includes CSI information of NCJT obtained based on at least two of the first CSI information; The second CSI information and the third CSI information, wherein the second CSI information includes CSI information of NCJT obtained based on at least two of the third CSI information; The first CSI information, the second CSI information and the third CSI information, the second CSI information includes CSI information of NCJT obtained based on at least one of the first CSI information and at least one of the third CSI information.

24. The method according to claim 22 or 23, further comprising: The network side device sends CSI report configuration information and the CSI report configuration information associated with the terminal to the terminal. CSI-RS resource configuration information; The CSI-RS resource configuration information is used to configure K CSI-RS resource groups, where K is a positive integer; The first CSI information is the CSI information of CJT obtained from different CSI-RS resources within the same CSI-RS resource group; the second CSI information is the CSI information of NCJT obtained from CSI-RS resources within different CSI-RS resource groups; and the third CSI information is the CSI information of a single CSI-RS resource within a CSI-RS resource group.

25. The method according to claim 24, wherein: The CSI-RS resource configuration information includes at least one of the following: Indication information of the number K of the CSI-RS resource groups; CSI-RS resources included in each of the CSI-RS resource groups; A first CSI-RS resource set, wherein the first CSI-RS resource set includes the K CSI-RS resource groups; K CSI-RS resource sets, each of the CSI-RS resource sets corresponds to one CSI-RS resource group.

26. The method according to claim 24 or 25, wherein: The network side device receives a first CSI report from a terminal, including: In a case where the CSI report configuration information indicates that the terminal reports at least two of the first CSI information, the second CSI information, and the third CSI information, the network side device receives a first CSI report from the terminal; or, The method further comprises: In a case where the CSI report configuration information does not indicate that the terminal reports at least two of the first CSI information, the second CSI information, and the third CSI information, or in a case where the CSI report configuration information does not restrict the terminal from reporting at least two of the first CSI information, the second CSI information, and the third CSI information, or in a case where the CSI report configuration information indicates that the CSI information reported by the terminal includes at least one of the first CSI information, the second CSI information, and the third CSI information, the network side device receives a second CSI report from the terminal, where the second CSI report includes at least one of the following: at least one of the first target CSI information; At least one second target CSI information, wherein each second target CSI information is any one of the first CSI information, the second CSI information and the third CSI information.

27. The method according to any one of claims 24 to 26, wherein: The CSI report configuration information includes at least one of the following: first indication information, where the first indication information is used to indicate that at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain target CSI information, where the target CSI information includes any one of the first target CSI information and the second target CSI information; second indication information, where the second indication information is used to indicate that at least part of the CSI-RS resources included in at least part of the CSI-RS resource groups configured by the CSI-RS resource configuration information are used to obtain the target CSI information; The third indication information is used to indicate at least one first combination, the first combination includes at least one CSI-RS resource group, the first combination is used to determine the CSI-RS resource group for obtaining the target CSI information and the CSI-RS resources in the CSI-RS resource group, and the CSI-RS resource group corresponding to the target CSI information includes comprising one of said first combinations; The fourth indication information is used to indicate at least one of the following: at least one type of the first target CSI information; at least one of the first CSI information; at least one of the second CSI information; At least one of the third CSI information.

28. The method according to any one of claims 23 to 27, further comprising: The network side device receives at least one of the following from the terminal: first feedback information, where the first feedback information indicates the CSI-RS resource group corresponding to the target CSI information; second feedback information, where the second feedback information indicates the CSI-RS resource in each of the CSI-RS resource groups corresponding to the target CSI information; Third feedback information, where the third feedback information indicates the first combination corresponding to the target CSI information.

29. The method according to any one of claims 22 to 28, further comprising: The network side device sends CSI interference measurement CSI-IM resource configuration information to the terminal, where the CSI-IM resource configuration information is used to configure a CSI-IM resource corresponding to any one of the following items: The first target CSI information, the second target CSI information, all or part of the K CSI-RS resource groups, the first combination, and CSI-RS resources.

30. The method according to any one of claims 23 to 29, wherein: The target CSI information further includes at least one basis vector group, where the basis vector group includes at least one item of a spatial domain SD basis vector group and a frequency domain FD basis vector group; The correspondence between the M CSI-RS resource groups corresponding to the target CSI information and the CSI-RS resources included therein and the base vector groups includes at least one of the following: Each CSI-RS resource included in some or all of the M CSI-RS resource groups corresponding to the target CSI information has a one-to-one correspondence with the base vector group; At least two or all of the M CSI-RS resource groups corresponding to the target CSI information correspond to the same base vector group.

31. The method according to claim 30, further comprising: The network side device sends basis vector configuration information to the terminal, where the basis vector configuration information includes at least one of the following: the number of the configured basis vector groups; the number of basis vectors included in the basis vector group for each configuration; A correspondence between each of the configured basis vector groups and a first object, wherein the first object includes at least one of the following: CSI-RS resources; CSI-RS resource group.

32. The method according to claim 31, wherein: The target CSI information also includes at least one of the following: Fourth feedback information, the fourth feedback information is used to indicate the basis vector group corresponding to the target CSI information quantity; Fifth feedback information, where the fifth feedback information is used to indicate the number of basis vectors included in each of the basis vector groups corresponding to the target CSI information.

33. A channel state information (CSI) transmission device, comprising: A first sending module, configured to send a first CSI report to a network side device, where the first CSI report includes at least one first target CSI information; Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; the third CSI information is the CSI information obtained by one CSI-RS resource.

34. A channel state information (CSI) transmission device, comprising: A first receiving module, configured to receive a first CSI report from a terminal, where the first CSI report includes at least one first target CSI information; Among them, each of the first target CSI information is at least two items of the first CSI information, the second CSI information and the third CSI information; the first CSI information is the CSI information of the coherent joint transmission CJT obtained by at least two CSI-RS resources; the second CSI information is the CSI information of the non-coherent joint transmission NCJT obtained by at least two CSI-RS resources; the third CSI information is the CSI information obtained by one CSI-RS resource.

35. A communication device, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the channel state information (CSI) transmission method as described in any one of claims 1 to 32 are implemented.

36. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the channel state information (CSI) transmission method according to any one of claims 1 to 32.

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