Channel state information (CSI) transmission method, terminal and network side device

Abstract

The present application relates to the technical field of communications and discloses a channel state information (CSI) transmission method, a terminal, and a network side device. The method in embodiments of the present application comprises: a terminal determining reference information of a plurality of first CSI to be fed back; the terminal mapping each first CSI according to the respective reference information thereof to obtain a plurality of second CSI; and the terminal sending a CSI report to a network side device, the CSI report comprising the plurality of second CSI, wherein for each first CSI, the reference information thereof is related to a CSI other than a current first CSI among the plurality of first CSI.

Description

Transmission method, terminal and network side device of channel state information (CSI)

[0001] Cross-reference to Related Applications

[0002] The present application claims priority from the Chinese patent application No. 202411327450.1 filed on September 23, 2024, and entitled "Transmission method, terminal and network side device of channel state information (CSI)", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and particularly relates to a transmission method, terminal and network side device of channel state information (CSI). BACKGROUND

[0004] In the related art, the correlation between multiple CSIs to be reported can be used to jointly map (such as encode, compress, etc.) the multiple CSIs, so as to reduce the resource overhead when reporting the CSI. Among them, the mapping relationship used in the joint mapping in the related art is pre-configured and difficult to change, such as the number of CSIs that can be jointly mapped by the mapping relationship, the mapping order of the CSI, etc. For example, taking the case where the mapping relationship is implemented based on an artificial intelligence (AI) model as an example, the number of CSIs that can be jointly mapped by the AI model and the mapping order of the CSI are all determined in the training stage of the AI model, so that the AI model can only jointly map the CSI with the corresponding number and the corresponding mapping order.

[0005] Therefore, in order to support the joint mapping of CSI with different mapping numbers or orders, multiple mapping relationships corresponding to different mapping numbers or orders need to be configured in the related art, thereby causing problems such as complex joint mapping relationship configuration, great management difficulty, etc. when reporting the CSI. SUMMARY

[0006] The embodiments of the present application provide a transmission method, terminal and network side device of CSI, which can reduce the resource overhead when reporting the CSI, while avoiding problems such as complex mapping relationship configuration, great management difficulty, etc.

[0007] In a first aspect, a CSI transmission method is provided, comprising: determining, by a terminal, reference information of a plurality of first CSIs to be fed back; mapping, by the terminal, each of the first CSIs according to the reference information of the first CSI, to obtain a plurality of second CSIs; and sending, by the terminal, a CSI report to a network side device, wherein the CSI report comprises the plurality of second CSIs; wherein for each of the first CSIs, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0008] In a second aspect, a CSI transmission method is provided, comprising: receiving, by a network side device, a CSI report from a terminal, wherein the CSI report comprises a plurality of second CSIs; and demapping, by the network side device, each of the second CSIs according to reference information of a first CSI, to obtain a plurality of first CSIs; wherein the reference information of the first CSI is reference information used when the first CSI is mapped to obtain the second CSI, and the reference information of each of the first CSIs is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0009] In a third aspect, a CSI transmission apparatus is provided, comprising: a processing module configured to determine reference information of a plurality of first CSIs to be fed back; the processing module is further configured to map each of the first CSIs according to the reference information of the first CSI, to obtain a plurality of second CSIs; and a transmission module configured to send a CSI report to a network side device, wherein the CSI report comprises the plurality of second CSIs; wherein for each of the first CSIs, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0010] In a fourth aspect, a CSI transmission apparatus is provided, comprising: a transmission module configured to receive a CSI report from a terminal, wherein the CSI report comprises a plurality of second CSIs; and a processing module configured to demap each of the second CSIs according to reference information of a first CSI, to obtain a plurality of first CSIs; wherein the reference information of the first CSI is reference information used when the first CSI is mapped to obtain the second CSI, and the reference information of each of the first CSIs is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0011] In a fifth aspect, a CSI transmission apparatus is provided, which is configured to perform the steps of the method of the first aspect, or implement the steps of the method of the second aspect.

[0012] In a sixth aspect, a terminal is provided, which comprises a processor and a memory, the memory storing programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

[0013] In a seventh aspect, a terminal is provided, which comprises a processor and a communication interface, wherein the processor is configured to determine reference information of a plurality of first CSI to be fed back, and map each of the first CSI according to the reference information of the first CSI to obtain a plurality of second CSI, and the communication interface is configured to send a CSI report to a network side device, the CSI report comprising the plurality of second CSI; and for each of the first CSI, the reference information of the first CSI is related to other CSI in the plurality of first CSI except the current first CSI.

[0014] In an eighth aspect, a network side device is provided, which comprises a processor and a memory, the memory storing programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect.

[0015] In a ninth aspect, a network side device is provided, which comprises a processor and a communication interface, wherein the communication interface is configured to receive a CSI report from a terminal, the CSI report comprising a plurality of second CSI; and the processor is configured to demap each of the second CSI according to reference information of a first CSI to obtain a plurality of first CSI; and the reference information of the first CSI is the reference information used when the first CSI is mapped to obtain the second CSI, and the reference information of each of the first CSI is related to other CSI in the plurality of first CSI except the current first CSI.

[0016] In a tenth aspect, a readable storage medium is provided, which stores programs or instructions, and the programs or instructions, when executed by a processor, implement the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0017] In an eleventh aspect, a wireless communication system is provided, which comprises a terminal and a network side device, the terminal being configured to implement the steps of the method according to the first aspect, and the network side device being configured to implement the steps of the method according to the second aspect.

[0018] In a twelfth aspect, a chip is provided, which comprises a processor and a communication interface, the communication interface being coupled to the processor, and the processor being configured to run programs or instructions to implement the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0019] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium, and which is executed by at least one processor to implement the steps of the method according to the first aspect, or to implement the steps of the method according to the second aspect.

[0020] In the embodiments of the present application, the terminal determines the reference information of the plurality of first CSIs to be fed back, and reports a plurality of second CSIs obtained by respectively mapping each of the first CSIs according to the reference information of each of the first CSIs. In this way, the CSI mapping performance can be improved, the resource overhead during CSI transmission can be reduced, and the complexity during mapping relationship configuration or management can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a structural schematic diagram of a wireless communication system according to an example embodiment of the present application.

[0022] FIG. 2 is a flow schematic diagram of a CSI transmission method according to an example embodiment of the present application.

[0023] FIG. 3a is an interactive flow schematic diagram of a CSI transmission method according to an example embodiment of the present application.

[0024] FIG. 3b is another interactive flow schematic diagram of a CSI transmission method according to an example embodiment of the present application.

[0025] FIG. 3c is a schematic diagram of a CSI mapping and demapping process according to an example embodiment of the present application.

[0026] FIG. 4 is a flow schematic diagram of a CSI transmission method according to another example embodiment of the present application.

[0027] FIG. 5 is a structural schematic diagram of a CSI device according to an example embodiment of the present application.

[0028] FIG. 6 is a structural schematic diagram of a CSI device according to another example embodiment of the present application.

[0029] FIG. 7 is a structural schematic diagram of a communication device according to an example embodiment of the present application.

[0030] FIG. 8 is a structural schematic diagram of a terminal according to an example embodiment of the present application.

[0031] FIG. 9 is a structural schematic diagram of a network side device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0032] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly described. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art are within the scope of the present application.

[0033] The terms "first", "second", and the like in the present 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 can be interchanged under appropriate circumstances, 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", "second" are generally a class, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, the protection scope of "A or B" at least covers three schemes, namely, scheme one: including A and not including B; scheme two: including B and not including A; scheme three: including A and B. In addition, the terms "A and / or B", "at least one of A and B", "at least one of A or B" also at least cover the above three schemes, respectively. The character " / " generally represents that the objects before and after are in a "or" relationship.

[0034] The term "indication" in the present application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). Among them, the direct indication can be understood as that the sender explicitly informs the receiver of the specific information, the operation to be performed or the request result, etc. in the indication sent by the sender; the indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or judges and determines the operation to be performed or the request result, etc. according to the judgment result.

[0035] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, 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 described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for the purpose of example, 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) communication systems.

[0036] FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as 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 embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit / receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical terminology, provided that the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0037] The core network device can also be referred to as a core network node, a core network function, or a core network network element, etc., which includes but is not limited to at least one of the following: a mobility management entity (MME), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), a policy and charging rules function (PCRF), an edge application server discovery function (EASDF), a unified data management (UDM), a unified data repository (UDR), a home subscriber server (HSS), a centralized network configuration (CNC), a network repository function (NRF), a network exposure function (NEF), a local NEF (L-NEF), a binding support function (BSF), an application function (AF), a location management function (LMF), a gateway mobile location center (GMLC), a network data analytics function (NWDAF), etc. It should be noted that only the core network device in the NR system is taken as an example for introduction in the embodiments of the present application, and the specific type of the core network device is not limited. If the name of the core network device mentioned in the embodiments of the present application changes in the subsequent protocol version (for example, 6G), it is also within the protection scope of the present application.

[0038] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices together, and the embodiments of the present application do not make a specific limitation here. It can be understood that the above function modules can be network elements in a hardware device, can be software function modules running on a special hardware, or can be virtualized function modules instantiated on a platform (for example, a cloud platform).

[0039] In addition, for the convenience of understanding, the related technical features involved in the present application are described herein.

[0040] 1. CSI compression feedback technology

[0041] The CSI compression mode is that the sending end of CSI maps high-dimensional CSI into a low-dimensional binary sequence based on a pre-defined codebook, and then the receiving end of CSI can recover the CSI based on the binary sequence. The types of codebooks currently supported for CSI compression include type I, type II and enhanced (e) type II codebooks.

[0042] 1) Type I codebook

[0043] The type I codebook is to report the precoding matrix indicator (PMI) of a wideband or a subband without the ability to report a complete channel or a precoder, that is, a two-dimensional discrete Fourier transform (DFT) vector and its phase rotation on a wideband or a subband. Among them, the type I mainly needs to report the index of the two-dimensional DFT vector and its phase rotation.

[0044] 2) Type 2 codebook

[0045] The type 2 codebook is a relatively simple two-dimensional DFT vector and its phase rotation. Among them, the PMI can be expressed as a linear weighting of a set of basis vectors. In addition, the type 2 codebook needs to report the basis vector index and the projection (such as amplitude and phase) on the basis vector.

[0046] 3) e type 2 codebook

[0047] Since the overhead of the type 2 codebook is several hundred or even several thousand bits, the e type 2 codebook is a further compression of the type 2 codebook, that is, the vector composed of the weighting coefficients on different subbands is further compressed into a vector composed of a set of frequency domain basis vectors.

[0048] (2) Artificial Intelligence (AI) unit

[0049] The CSI compression use case based on the AI unit is a typical two-end model (such as a terminal-side model, a network-side model) use case, that is, a complete CSI compression model needs to be deployed on different network nodes. At present, most of the cases considered are to deploy an encoder at the UE end and a decoder at the network (NW) end. Among them, the (sub) models deployed on multiple nodes need to be used in pairs to work normally.

[0050] Considering the above characteristics of the two-end model, the following types of training collaboration are basically determined at present.

[0051] 1) Joint training at single entity (or type 1)

[0052] The joint training at single entity refers to training a complete encoder-decoder model on a certain network node (UE or NW or a third-party server node, etc.), and then deploying the corresponding model to the target node through model transfer, etc., for example, transferring the encoder part to the UE and the decoder part to the NW.

[0053] 2) Joint training at multiple entities (or type 2)

[0054] The joint training at multiple entities refers to the participation of multiple nodes in the training process, and each node calculates the forward / backward propagation information required for local model training and updates the model parameters of its own node. Since the training process needs to perform forward / backward propagation on the entire model (including the encoder and the decoder), the nodes participating in the training need to transfer the corresponding forward / backward propagation information. After the training is completed, the nodes no longer need to transfer the model.

[0055] 3) Separate training at multiple entities (or type 3)

[0056] The separate training on multiple nodes refers to training a reference model on a certain node first, sending relevant information of the reference model to a target node, and finally training a model required by the target node according to the information, so as to ensure that the node (sub) models can be used in pairs. For example, the NW side first trains a complete model of an encoder plus decoder and determines that the obtained decoder is the decoder to be used in the future, and then sends relevant information (generally the input and output data of the encoder) of the encoder corresponding to the decoder to the UE side. The UE side trains the encoder used by itself based on the information.

[0057] The training framework can be further divided into two cases of UE-first training and NW-first training. The UE-first training refers to training a complete model on the UE side first, and then sending information (generally the input and output data of the model to be trained on the NW side) required by the model matched by the NW training to the NW side. In contrast, the NW-first training refers to training a complete model on the NW side first, and then sending information (generally the input and output data of the model to be trained on the UE side) required by the model matched by the UE training to the UE side.

[0058] It is worth noting that the AI model mentioned in the context of the present application can also be referred to as an AI unit, a machine learning (ML) model, an ML unit, an AI structure, an AI function, an AI feature, a machine learning model, a neural network, a neural network function, a neural network function, or the like. Alternatively, the AI unit / AI model can refer to a processing unit capable of implementing a specific algorithm, formula, processing flow, capability, or the like related to AI, or the AI unit / AI model can be a processing method, algorithm, function, module, or unit for a specific data set. Alternatively, the AI unit / AI model can be a processing method, algorithm, function, module, or unit running on AI / ML related hardware such as a Graphics Processing Unit (GPU), a Neural Processing Unit (NPU), a Tensor Processing Unit (TPU), or an Application-Specific Integrated Circuit (ASIC), without specific limitation. Optionally, the specific data set includes input and / or output of the AI unit or I model.

[0059] Optionally, the identification of the AI model can be an AI unit identification, an AI structure identification, an AI algorithm identification, or an identification of a specific data set associated with the AI unit or the AI model, or an identification of a specific scene, environment, channel feature, or device related to the AI / ML, or an identification of a function, feature, capability, or module related to the AI / ML, which is not limited in the present application.

[0060] The technical solutions provided by the embodiments of the present application will be described in detail below in combination with the drawings and some embodiments and application scenarios.

[0061] As shown in FIG. 2, it is a flowchart of a CSI transmission method 200 provided by an exemplary embodiment of the present application, which can be but is not limited to being executed by a terminal, and can be executed by hardware and / or software installed in the terminal. In this embodiment, the method 200 can at least include the following steps.

[0062] S210, the terminal determines the reference information of a plurality of first CSIs to be fed back.

[0063] The plurality of first CSIs to be fed back can be understood as the CSI expected or instructed by the network side device to be fed back by the terminal.

[0064] In this embodiment, for each first CSI, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI. The "current first CSI" can be understood as the first CSI currently performing reference information determination. For example, assuming that the plurality of first CSIs to be fed back are CSI0, CSI1, CSI2, and CSI3, if the first CSI currently performing reference information determination is CSI2, the current first CSI is CSI2, and at the same time, the reference information of the current first CSI is related to CSI0, CSI1, and CSI3 except CSI2.

[0065] In an embodiment, the reference information of the first CSI related to other CSIs in the plurality of first CSIs except the current first CSI can include but is not limited to that the reference information of the first CSI can be a subset of other CSIs in the plurality of first CSIs except the current first CSI, and / or the reference information of the first CSI is a subset of the related information of other CSIs in the plurality of first CSIs except the current first CSI.

[0066] That is, the reference information of the first CSI in this embodiment is related to a subset of other CSIs except the current CSI in one CSI reporting or a subset of related information of other CSIs, and does not involve other earlier reported or already reported CSIs.

[0067] For the case that the reference information of the first CSI is a subset of other CSIs in the plurality of first CSIs except the current first CSI, if the subset is an empty set, it can be understood that the first CSI has no reference information, and the terminal can map the first CSI based on the mapping relationship and without relying on any information.

[0068] For example, assuming that the plurality of first CSIs to be fed back are CSI0, CSI1, CSI2, and CSI3, taking CSI2 as an example, the reference information of the CSI2 can be a subset of {CSI0, CSI1, CSI3}, such as {CSI0}, {CSI0, CSI1}, {CSI0, CSI3}, {CSI1, CSI3}, {CSI0, CSI1, CSI3}, and {}.

[0069] For the case that the reference information of the first CSI is a subset of the related information of other CSIs in the plurality of first CSIs except the current first CSI, if the subset is an empty set, it can be understood that the terminal can map the first CSI based on the mapping relationship and without relying on any information.

[0070] For example, assuming that the plurality of first CSIs to be fed back are CSI0, CSI1, CSI2, and CSI3, taking CSI2 as an example, the reference information of the CSI2 can be a subset of {the related information A0 of CSI0, the related information A1 of CSI1, and the related information A3 of CSI3}, such as {A0}, {A0, A1}, {A0, A3}, {A1, A3}, {A0, A1, A3}, and {}.

[0071] For the case that the reference information of the first CSI is a subset of other CSIs in the plurality of first CSIs except the current first CSI, and the reference information of the first CSI is a subset of the related information of other CSIs in the plurality of first CSIs except the current first CSI, it can be understood that one reference information of the first CSI includes a subset of other CSIs in the plurality of first CSIs except the current first CSI, and a subset of the related information of other CSIs in the plurality of first CSIs except the current first CSI.

[0072] Exemplarily, assuming that the plurality of first CSIs to be fed back are CSI0, CSI1, CSI2, and CSI3 respectively, then, taking CSI2 as an example, the reference information of CSI2 includes a subset of {CSI0, CSI1, CSI3}, and a subset of {the related information A0 of CSI0, the related information A1 of CSI1, and the related information A3 of CSI3}, and the reference information of CSI2 can include {CSI0, CSI1, A3}, {CSI0, CSI3, A1}, {CSI0, A3, A1}, etc., which are not limited herein.

[0073] Alternatively, for the reference information of the first CSI being related to other CSIs in the plurality of first CSIs except the current first CSI, it can be understood that: the reference information of a part of the plurality of first CSIs is a subset of the other CSIs in the plurality of first CSIs except the current first CSI, and the reference information of another part of the plurality of first CSIs is a subset of the related information of the other CSIs in the plurality of first CSIs except the current first CSI.

[0074] Exemplarily, assuming that the plurality of first CSIs to be fed back are CSI0, CSI1, and CSI2 respectively, then, the reference information of CSI0 can be a subset of {CSI1, CSI2}, the reference information of CSI1 can be a subset of {CSI0, CSI2}, and the reference information of CSI2 can be a subset of {the related information A0 of CSI0, the related information A1 of CSI1}.

[0075] In the embodiment, the related information of the CSI can include but is not limited to internal information or high-dimensional information obtained after processing the CSI, etc., which are not limited herein.

[0076] S220, the terminal respectively maps each first CSI according to the reference information of each first CSI, to obtain a plurality of second CSIs.

[0077] Exemplarily, the terminal can determine a mapping order as CSI0, CSI1, CSI2, CSI3, and can first map CSI0 to a second CSI0 based on the preconfigured mapping relationship, then map CSI1 to a second CSI1 based on the preconfigured mapping relationship and the reference information B1 of CSI1, then map CSI2 to a second CSI2 based on the preconfigured mapping relationship and the reference information B2 of CSI2, and finally map CSI3 to a second CSI3 based on the preconfigured mapping relationship and the reference information B3 of CSI3.

[0078] It can be understood that, in the CSI transmission scheme provided in the embodiments of the present application, although the utilization of CSI correlation is slightly weaker than the joint mapping manner adopted in the related art, the embodiments of the present application can sequentially implement the mapping of the multiple first CSIs to be fed back based on one mapping relationship, ensure the flexibility of the mapping relationship, reduce the number of mapping relationships required when the CSI is reported, and reduce the complexity when the mapping relationship is configured or managed.

[0079] Meanwhile, the process that the terminal maps the first CSI according to the reference information of the first CSI can be understood as that the terminal maps the incremental information of the first CSI relative to the reference information of the first CSI, thereby improving the CSI mapping performance and avoiding the problem of large resource overhead when the complete information of the first CSI needs to be mapped and fed back, that is, the CSI transmission scheme provided in the present application can reduce the resource overhead when the CSI is transmitted.

[0080] For example, assuming that the multiple first CSIs to be fed back are CSI0, CSI1, CSI2, and CSI3, wherein the reference information of CSI3 is CSI1 and CSI2, when the terminal maps CSI3, it can be understood that the terminal maps the incremental information of CSI3 relative to CSI1 and CSI2, and thus, compared with the direct mapping of CSI3, the incremental information mapping manner can effectively reduce the mapped information bits, and further reduce the resource overhead when CSI3 is reported.

[0081] Based on the foregoing, the embodiment can improve the CSI mapping performance, reduce the resource overhead during CSI transmission, and reduce the complexity during mapping relationship configuration or management, by mapping each first CSI according to the reference information of each first CSI.

[0082] Notably, the "mapping" mentioned in the context of the present application can also be understood as encoding or compression, etc. That is, in the embodiment, each first CSI can be compressed or encoded according to the reference information of each first CSI through the mapping relationship, to obtain better CSI compression or encoding performance and reduce the resource overhead during CSI transmission.

[0083] Correspondingly, the mapping relationship (also referred to as a mapping manner, etc.) can be understood as a compressor capable of realizing CSI compression, or an encoder capable of realizing CSI encoding, etc.

[0084] Alternatively, the mapping relationship mentioned in the context of the present application is realized based on an AI model. The AI model includes at least one of the following: an AI model used by the terminal; a reference AI model of the AI model used by the terminal; an AI model used by the terminal or test equipment in testing; and a reference AI model of the AI model used by the terminal or test equipment in testing.

[0085] In S230, the terminal sends a CSI report to a network side device, and the CSI report includes the plurality of second CSIs.

[0086] In an embodiment, the plurality of first CSIs to be fed back can be respectively associated with or correspond to different measurement resources, such as CSI-RS, etc. Alternatively, the measurement resources can be associated with at least one of a measurement beam, a measurement frequency point, and a transmission manner. The transmission manner can include at least one of a single-TRP transmission manner and a multi-TRP transmission manner, but is not limited to this.

[0087] The association of the measurement resources with at least one of a measurement beam, a measurement frequency point, and a transmission manner can be understood as follows: the CSI transmission scheme provided by the present application can be CSI reporting under multi-beam or multi-frequency or multi-transmission manner, to reduce the resource overhead during CSI reporting.

[0088] Optionally, the CSI mentioned in the context of the present application can include, but is not limited to, all or part of the following: CSI reference signal resource indicator (CSI-RS Resource Indicator, CRI), PMI, rank indicator (Rank indicator, RI), channel quality indicator (Channel quality indicator, CQI), layer indicator (Layer indicator, LI), and precoding matrix.

[0089] In an embodiment, the terminal determines the reference information of the plurality of first CSIs to be fed back in S210 in various ways, for example, according to the first information configured by the network side device or agreed by the protocol.

[0090] The first information is used to indicate at least one of the following 01)-02).

[0091] 01) The reference information of at least one CSI in the plurality of first CSIs. That is, the reference information of at least one first CSI can be indicated to the terminal by the protocol agreement or the network side configuration / indication, so as to map and report the first CSI.

[0092] In an embodiment, if the first information indicates the reference information of part of the first CSIs, the terminal can autonomously determine the reference information of the first CSI which is not indicated by the reference information according to its own needs or the relevant rules agreed by the protocol (such as the first rule described below).

[0093] For example, it is assumed that the network side device indicates the terminal to report the CSI corresponding to [CSI-RS0, CSI-RS1, CSI-RS2], and also indicates the first information that the reference information of CSI0 corresponding to CSI-RS0 is empty, and the reference information of CSI1 corresponding to CSI-RS1 is empty. For the CSI12 (corresponding to CSI-RS2) which is not indicated by the reference information, the terminal can determine the reference information of CSI2 by itself, such as the reference information of CSI2 can be related to at least one of CSI0 and CSI1.

[0094] In an embodiment, when the first information indicates the reference information of at least one CSI in the plurality of first CSIs, the first information can include, but is not limited to, at least one of the following 01a)-01c).

[0095] 01a) a first indication information, used for indicating a mapping order of the plurality of first CSI, the mapping order being used for determining reference information of the first CSI. That is, the network side device can indicate the mapping order of the plurality of first CSI to the terminal through the first indication information, i.e. an overall order of the plurality of first CSI to be fed back, so that the terminal can determine the reference information of each of the first CSI according to the overall order.

[0096] For example, in the embodiment, assuming that the reference information of the first CSI is related to all the CSI before the mapping order of the first CSI, when the network side device indicates the mapping order of the plurality of first CSI as CSI0, CSI1, CSI2, the terminal can determine that the reference information of CSI0 is empty, the reference information of CSI1 is related to CSI0 (e.g. the reference information of the CSI includes CSI0), and the reference information of CSI2 is related to CSI0 and CSI1 (e.g. the reference information of the CSI includes CSI0 and CSI1).

[0097] In an embodiment, the first indication information can be indicated in various ways, for example, through the measurement resource corresponding to or associated with the CSI.

[0098] For example, assuming that the measurement resource is CSI-RS, and the first indication information indicated by the protocol or the network side device is [CSI-RS0, CSI-RS1, CSI-RS2, CSI-RS3]. When the terminal receives the first indication information [CSI-RS0, CSI-RS1, CSI-RS2, CSI-RS3] sent by the network side device, it can determine that the mapping order of the plurality of first CSI is CSI0 corresponding to CSI-RS0, CSI1 corresponding to CSI-RS1, CSI2 corresponding to CSI-RS2, and CSI3 corresponding to CSI-RS2, and according to the rule that the reference information of the first CSI is related to all the CSI before the mapping order of the first CSI, it can determine that the reference information of CSI0 corresponding to CSI-RS0 is empty, the reference information of CSI1 corresponding to CSI-RS1 is CSI0, the reference information of CSI2 corresponding to CSI-RS2 is [CSI-RS1, CSI-RS0], and the reference information of CSI3 corresponding to CSI-RS3 is [CSI-RS2, CSI-RS1, CSI-RS0].

[0099] It is worth noting that the indication mode of the reference information of the first CSI through the first indication information in the embodiment can avoid repeated indication of some common reference information and save indication overhead.

[0100] For example, assuming that the network-side device needs to indicate that the reference information of CSI1 is CSI0, the reference information of CSI2 is CSI1 and CSI0, and the common reference information is CSI0, in this case, relative to the indication manner of the network-side device indicating that the reference information of CSI1 is CSI0 and the reference information of CSI2 is CSI1 and CSI0 respectively, the network-side device indicates the whole sequence of CSI0, CSI1 and CSI2 through the first indication information, so as to achieve the indication purpose of indicating that the reference information of CSI1 is CSI0 and the reference information of CSI2 is CSI1 and CSI0, avoid the repeated indication of the common reference information CSI0, and save the indication overhead.

[0101] 01b) second indication information for indicating the first specific CSI, wherein the first specific CSI is a CSI which is related to the reference information of each of the first CSIs, is located in front of the mapping sequence of the first CSI in the mapping sequence, and is closest to the mapping sequence of the first CSI.

[0102] That is, there is a binding relationship between the reference information used by the terminal for mapping a certain first CSI and the mapping sequence of other CSIs, and the significance of the sequence binding relationship is that if a certain CSI references more than one CSI, only the first specific CSI which is closest to the mapping sequence needs to be indicated, and the reference CSI in front of the first specific CSI can be obtained by the terminal according to the first specific CSI and the mapping sequence.

[0103] For example, assuming that the multiple first CSIs to be fed back are CSI1, CSI2, CSI3 and CSI4, the reference information of CSI4 is related to CSI1, CSI2 and CSI3, and the mapping sequence of CSI1, CSI2, CSI3 and CSI4 is CSI1, CSI2, CSI3 and CSI4 in turn, the first specific CSI which is located in front of the mapping sequence of CSI4 and is closest to the mapping sequence of CSI4 is CSI3.

[0104] In an embodiment, the indication manner of the second indication information is various, for example, the second indication information can be newly introduced information which is specially used for the indication of the first specific CSI, or can be the measurement resource corresponding to the first specific CSI. For the latter, assuming that the measurement resource is CSI-RS, the network-side device can indicate the first specific CSI corresponding to CSI4, that is, CSI3, through CSI-RS3. That is, when the second indication information is CSI-RS3, the terminal can determine that the reference information corresponding to the CSI-RS4 is related to CSI1, CSI2 and CSI3 corresponding to CSI-RS3, CSI-RS2 and CSI-RS1.

[0105] It is worth noting that the way of indicating the first specific CSI through the second indication information can reduce the resource overhead when indicating the reference information of the first CSI.

[0106] 01c) the reference information of the first CSI. That is, the network side device realizes the indication of the reference information of the first CSI through direct indication, to ensure the integrity of the indication of the reference information of the first CSI.

[0107] Exemplarily, assuming that the multiple first CSIs to be fed back are CSI1, CSI2, CSI3, and CSI4, respectively, the network side device can indicate that the reference information of CSI0 corresponding to CSI-RS0 is [], the reference information of CSI1 corresponding to CSI-RS1 is the CSI0 corresponding to [CSI-RS0], the reference information of CSI-RS2 is the CSI1 and CSI0 corresponding to [CSI-RS1, CSI-RS0], the reference information of CSI3 corresponding to CSI-RS3 is the CSI1 and CSI0 corresponding to [CSI-RS1, CSI-RS0], and so on.

[0108] It is worth noting that the indication of the reference information of the first CSI can be represented by the measurement resource corresponding to the CSI. For example, if the network side device indicates that the reference information of CSI-RS2 is [CSI-RS1, CSI-RS0], it means that the reference information of CSI2 corresponding to CSI-RS2 is the CSI1 and CSI0 corresponding to [CSI-RS1, CSI-RS0].

[0109] In an embodiment, when indicating the reference information of at least one CSI of the multiple first CSIs through the first information, in addition to the way of indicating (such as CRI) through the aforementioned measurement resource, the way of indicating through bitmap is also possible, which is not limited here.

[0110] 02) the first rule, which is the rule between the other CSI of the multiple first CSIs except the current first CSI and the reference information of the current first CSI.

[0111] In an embodiment, the first rule can be pre-configured on the terminal through protocol agreement or network side configuration, to be used by the terminal to determine the reference information of the first CSI according to the first rule.

[0112] In an embodiment, the first rule can include but is not limited to at least one of the following rules 11 to 13.

[0113] Rule 11: The number of CSIs related to the reference information of the first CSI does not exceed a first threshold. That is, the number of CSIs related to the reference information of the current first CSI among the other first CSIs except the current first CSI does not exceed the first threshold.

[0114] Rule 12: The number of CSIs related to the reference information of the third CSI is different from the number of CSIs related to the reference information of the fourth CSI, the third CSI being the first CSI that must be reported, and the fourth CSI being the first CSI that can be reported. That is, the number of CSIs related to the reference information of the third CSI among the other first CSIs except the third CSI is different from the number of CSIs related to the reference information of the fourth CSI among the other first CSIs except the fourth CSI.

[0115] For example, assuming that the first CSIs to be fed back are CSI1 and CSI2, and CSI1 is the first CSI that must be reported and CSI2 is the first CSI that can be reported, the terminal determines the reference information of each CSI according to rule 12, and the number of CSIs related to the reference information of CSI1 is different from the number of CSIs related to the reference information of CSI2.

[0116] Rule 13: The reference information of the first CSI is related to all the CSIs located before the first CSI in the mapping order.

[0117] For example, assuming that the first CSIs to be fed back are CSI1, CSI2, CSI3 and CSI4, and the mapping order of CSI1, CSI2, CSI3 and CSI4 is CSI1, CSI2, CSI4 and CSI3 in turn, the terminal determines the reference information of CSI1 according to rule 13, and the reference information of CSI1 is empty; the reference information of CSI2 is related to CSI1, such as the reference information of CSI2 including CSI1; the reference information of CSI4 is related to CSI1 and CSI2, such as the reference information of CSI4 including CSI1 and CSI2; and the reference information of CSI3 is related to CSI1, CSI2 and CSI4, such as the reference information of CSI3 including CSI1, CSI2 and CSI4.

[0118] It is worth noting that the terminal can implement one or more of the preceding rules 11-13 when determining the reference information of the first CSI, such as determining the number of CSIs related to the reference information of the first CSI based on rule 11, determining the number of CSIs related to the reference information of the first CSI that must be reported based on rule 12, and determining which CSIs related to the reference information of the first CSI based on rule 13.

[0119] In an embodiment, when the first information comes from the network side device and is used to indicate the first rule, the first information can include, but is not limited to, at least one of a first identifier and first description information.

[0120] The first identifier is used to identify the first rule. In this embodiment, "the first identifier is used to identify the first rule" can be understood as: the first identifier is used for the terminal to distinguish the first rule from the pre-configured rules, such as distinguishing one or more of the preceding rules 11-13 that need to be used, or the first identifier is used to indicate the first rule that needs to be used to the terminal, such as one or more of the preceding rules 11-13.

[0121] That is, taking the indication of the network side device as an example, the first rule can be pre-configured in the network side device and the terminal in this embodiment, then the network side device can select one or more from the pre-configured first rules (such as rule 11, rule 12, rule 13) and indicate to the terminal through the first identifier, so that the terminal determines the reference information of the first CSI according to the first rule identified by the first identifier. In this embodiment, the way of indicating the first rule through the first identifier can reduce the resource overhead of the network side device indicating the first rule.

[0122] The first description information is used to describe the content in the first rule, such as describing at least one of the preceding rules 11-13. In this embodiment, the way of indicating the first rule through the first description information can ensure the integrity of the first rule indication.

[0123] In an embodiment, the first information can be obtained by the terminal in a protocol agreed manner in addition to being obtained from the network side device. In this embodiment, if the terminal autonomously obtains the first information according to the protocol agreed manner and determines the reference information of the first CSI according to the first rule indicated by the first information, the terminal needs to indicate the reference information of the first CSI to the network side device after determining the reference information of the first CSI when performing the CSI reporting, so as to ensure that the network side device and the terminal have consistent understanding of the reference information of the first CSI, and further make the network side device obtain the accurate first CSI through demapping.

[0124] In an embodiment, for the case that the network side device completely indicates the reference information of the first CSI to be fed back, the network side device can clearly know the reference information used by the terminal when performing the first CSI mapping after receiving the CSI report sent by the terminal, and perform the demapping of each second CSI based on this, so as to complete the transmission process of the first CSI.

[0125] In another embodiment, for the case that the network side device partially indicates or does not indicate the reference information of the first CSI, the terminal also needs to indicate the reference information of the first CSI autonomously determined by the terminal to the network side device when sending the CSI report to the network side device, so as to make the network side device and the terminal have consistent understanding of the reference information of the first CSI, and further realize the demapping of each second CSI received, so as to complete the transmission process of the first CSI.

[0126] That is, the CSI report sent by the terminal to the network side device can also include third information for indicating the reference information of at least one CSI of the plurality of first CSIs, so that the network side device can determine the reference information of the first CSI according to the third information, and perform the demapping of the second CSI in the CSI report according to the reference information of the first CSI. In this way, it can be ensured that the network side device and the terminal have consistent understanding of the reference information of the first CSI, and further make the network side device obtain the accurate first CSI through demapping.

[0127] Optionally, the third information can include but is not limited to at least one of the following 11)-12).

[0128] 11) third indication information for indicating a second specific CSI, wherein the second specific CSI is a CSI related to the reference information of each first CSI, and has a mapping sequence before the mapping sequence of the first CSI and is closest to the mapping sequence of the first CSI.

[0129] That is, the terminal maps a binding relationship between the reference information used by a certain first CSI and the mapping order of other CSIs, and the meaning of this order binding relationship is that if more than one CSI is referenced when mapping a certain CSI, only the most recently referenced CSI, i.e., the second specific CSI, needs to be indicated, and the reference CSI further back can be derived from the second specific CSI.

[0130] For example, assuming that the multiple first CSIs to be fed back are CSI1, CSI2, and CSI3, the reference information used to map CSI3 is CSI2 and CSI1, the reference information used to map CSI2 is CSI1, and the reference information used to map CSI1 is CSI1, if the terminal indicates that the reference information of CSI3 is the second specific CSI, i.e., CSI2, to the network side device through the third indication information, the network side device can derive all the reference information used to map CSI3, i.e., CSI2 and CSI1, through the recursive relationship. In addition, it is actually implied that the reference information used to map CSI2 is CSI1, and the reference information used to map CSI1 is empty.

[0131] In an embodiment, the third indication information has multiple indication modes, for example, the third indication information can be newly introduced information dedicated to the indication of the second specific CSI, or it can be measurement resources corresponding to the second specific CSI. For the latter, assuming that the measurement resource is a CSI-RS, the network side device can indicate the second specific CSI corresponding to CSI4, i.e., CSI3, through CSI-RS3.

[0132] It is worth noting that the way of indicating the second specific CSI through the second indication information can reduce the resource overhead when indicating the reference information of the first CSI.

[0133] 12) The reference information of each of the first CSIs. That is, the terminal indicates the reference information of the first CSI to the network side device through a direct indication mode, thereby ensuring the indication integrity of the reference information of the first CSI.

[0134] For example, assuming that the multiple first CSIs are CSI0, CSI1, CSI2, and CSI3, the terminal can indicate through the third information that the reference information of CSI0 corresponding to CSI-RS0 is [], the reference information of CSI1 corresponding to CSI-RS1 is [CSI-RS0], the reference information corresponding to CSI-RS2 is [CSI-RS1, CSI-RS0] corresponding to CSI1 and CSI0, and the reference information of CSI3 corresponding to CSI-RS3 is [CSI-RS1, CSI-RS0] corresponding to CSI1 and CSI0, etc.

[0135] It is worth noting that the indication of the reference information of the first CSI can be represented by the measurement resource corresponding to the CSI, for example, if the terminal indicates that the reference information of CSI2 is CSI1 and CSI0 through the third information, the third information can be: the reference information of CSI-RS2 is [CSI-RS1, CSI-RS0].

[0136] In an embodiment, for the aforementioned reference information of the first CSI, if one of the reference information of the first CSI is related to multiple CSIs, the third information can also be used to indicate the use order of the multiple CSIs, so as to ensure that the order of the reference information used by the network side device when demapping the second CSI matches the order of the reference information used by the terminal when mapping, such as corresponding or identical, and further ensure the accuracy of the demapping result of the network side device.

[0137] For example, assuming that the reference information of CSI4 includes CSI1, CSI2 and CSI3, the terminal maps CSI4 according to the use order of CSI1, CSI2 and CSI3 to obtain the second CSI4, the terminal can indicate through the third information that the reference information of CSI4 is CSI1, CSI2 and CSI3, and also need to indicate the use order of the reference information of CSI4 is CSI1, CSI2 and CSI3. Correspondingly, when receiving the second CSI4, the network side device can demap the second CSI4 according to the third information and according to the use order of CSI1, CSI2 and CSI3 to obtain CSI4'. Thus, the order of the reference information used by the network side device when demapping the second CSI matches the order of the reference information used by the terminal when mapping, and further ensures the accuracy of the demapping result of the network side device.

[0138] In an embodiment, when indicating the reference information of at least one of the multiple first CSIs to the network side device through the third information, in addition to the aforementioned indication by the measurement resource (such as CRI), it can also be indicated by the bitmap, which is not limited here.

[0139] In an embodiment, when the terminal sends the CSI report to the network side device in S230, the terminal can also first sort the multiple second CSIs according to the second information, and then send the CSI report to the network side device based on the sorted second CSIs, i.e., the CSI report includes the sorted multiple second CSIs. In this way, through the sorting of the multiple second CSIs, the second CSI discarding operation that may occur when sending the CSI report can be better supported. For example, when the uplink resource is insufficient to accommodate the reporting of all second CSIs, in this embodiment, the discarding of part of the CSI based on the sorted second CSI (e.g., the second CSI at the rear of the sorting can be discarded preferentially) can be used to solve the problem of insufficient uplink resources, while also avoiding the problem that the CSI at the rear of the mapping order cannot be normally demapped even if it is correctly reported due to the discarding of the CSI at the front of the mapping order.

[0140] The second information can be used to indicate at least one of the following 21)-22).

[0141] 21) The sorting information of the multiple second CSIs. That is, the arrangement order of each second CSI can be indicated to the terminal by protocol agreement or network side device configuration / indication, so that the terminal performs CSI reporting based on the arrangement order.

[0142] Optionally, the sorting information of the multiple second CSIs can be indicated by the sorting information of the measurement resource (e.g., CSI-RS), such as the network side device can indicate that the sorting information of the multiple second CSIs is [CSI-RS0, CSI-RS1, CSI-RS2], i.e., the order of the multiple second CSIs is: the second CSI0 corresponding to CSI0, the second CSI1 corresponding to CSI1, and the second CSI2 corresponding to CSI2.

[0143] 22) A second rule, which is a rule between the reference information of each first CSI and the multiple second CSIs. That is, a determination rule of the arrangement order of the second CSI can be determined by protocol agreement or network side device configuration / indication, so that the terminal determines the arrangement order of the second CSI based on the determination rule.

[0144] The second rule can include but is not limited to at least one of the following rules 21-22.

[0145] Rule 21: Sort each second CSI according to whether the reference information is used when mapping each first CSI. For example, the second CSI corresponding to the first CSI that does not use the reference information is sorted in the front, and the second CSI corresponding to the first CSI that uses the reference information is sorted in the rear.

[0146] Exemplarily, assuming that the reference information of CSI2 includes CSI0, the reference information of CSI3 includes CSI0 and CSI2, and the reference information of CSI1 is empty, i.e., no reference information is used, the CSI report sent by the terminal includes: the second CSI corresponding to CSI1, the second CSI corresponding to CSI2, and the reference information corresponding to CSI3.

[0147] Rule 22: The second CSIs are sorted according to the number of reference information used in the mapping of the first CSIs. For example, the more the number of reference information used in the mapping of the first CSIs, the later the sorting of the second CSI corresponding to the first CSI.

[0148] Exemplarily, assuming that the reference information of CSI2 includes CSI0 and CSI1, the reference information of CSI3 includes CSI2, and the reference information of CSI1 is empty, i.e., no reference information is used, the CSI report sent by the terminal includes: the second CSI corresponding to CSI1, the second CSI corresponding to CSI3, and the second CSI corresponding to CSI2.

[0149] In an embodiment, the second information can be achieved by protocol agreement or network-side device configuration or indication. If the second information is sent by the network-side device and used to indicate the second rule, the second information can include, but is not limited to, at least one of a second identifier and second description information.

[0150] The second identifier is used to identify the second rule. In this embodiment, "the second identifier is used to identify the second rule" can be understood as: the second identifier is used to distinguish the second rule from the pre-configured rules by the terminal, such as distinguishing one or more of the rules 11-13 from the foregoing, or the second identifier is used to indicate the second rule to be used by the terminal, such as one or more of the rules 21-22 from the foregoing.

[0151] That is, taking the network-side device indication as an example, the second rule can be pre-configured in the network-side device and the terminal, then the network-side device can select one or more from the pre-configured second rules and indicate them to the terminal through the second identifier, so that the terminal sorts the multiple second CSIs according to the second rule identified by the second identifier. In this embodiment, the second rule is indicated by the second identifier, which can reduce the resource overhead of the network-side device indicating the second rule.

[0152] The second description information is used to describe the content of the second rule, such as at least one of the preceding rules 21-22. In this embodiment, the way in which the second description information indicates the second rule can ensure the integrity of the indication of the second rule.

[0153] In an embodiment, the network-side device can adopt the same demapping relationship when demapping each second CSI in the CSI report sent by the terminal after receiving the CSI report, thereby ensuring the flexibility of the use of the demapping relationship, reducing the number of demapping relationships required when reporting the CSI, and reducing the complexity when configuring or managing the demapping relationship.

[0154] In addition, the demapping relationship used by the network-side device when demapping each second CSI in the CSI report corresponds to the mapping relationship used by the terminal when mapping the first CSI. In this case, the demapping relationship can also be called a decoder or decompressor corresponding to the mapping relationship.

[0155] Alternatively, the demapping relationship can be implemented based on an AI model. For example, in this embodiment, the AI model includes at least one of the following: an AI model used by the network-side device; a reference AI model of the AI model used by the network-side device; an AI model used by the network-side device or a test device in testing; and a reference AI model of the AI model used by the network-side device or the test device in testing.

[0156] The transmission scheme of the CSI provided by the embodiments of the present application can support mapping of the CSI according to the reference information, thereby obtaining better mapping effect (or equivalently reducing the used reporting bits under the same compression effect) while reducing the number of required mapping relationships (such as AI models).

[0157] Based on the description of each embodiment in the preceding CSI transmission method 200, in order to better understand the technical solutions provided by the present application, the implementation process of the CSI transmission method provided by the present application will be exemplarily described below in combination with examples.

[0158] Example 1

[0159] Suppose that the network-side device indicates the reference information of all the first CSIs to be fed back, then, as shown in FIG. 3a, the reporting process thereof is as follows.

[0160] S311, data collection.

[0161] Among them, the network-side device can configure the terminal to measure the CSI on multiple measurement resources (such as CSI-RS), and report the measured CSI and its associated CSI-RS information to the network-side device for configuration of the mapping relationship.

[0162] Optionally, in the case that the mapping relationship is implemented based on an AI model, the data reported in S311 can be used for training of the AI model.

[0163] Optionally, the terminal can report the collected data through air interface or RRC signaling.

[0164] S312, reporting of terminal capability information.

[0165] In the capability reporting stage, the terminal informs the network side device whether the terminal supports the function of CSI mapping (such as encoding, compression, etc.) based on the mapping relationship and other capabilities.

[0166] In the case that the mapping relationship is implemented based on an AI model, the terminal can further report whether it supports a specific AI unit structure, etc., wherein the specific model structure can include but is not limited to one or more of a fully connected model, a convolutional network model, etc.

[0167] S313, determination of the mapping relationship and the corresponding demapping relationship.

[0168] In the case that the mapping relationship and the demapping relationship corresponding to the mapping relationship are implemented based on an AI model, the network side device can train the AI model based on the collected multiple CSIs, such as training a complete AI model (such as an encoder) for CSI mapping and an AI model (such as a decoder) for CSI demapping.

[0169] Optionally, the training method of the aforementioned AI model can include joint training on a single node, joint training on multiple nodes, separate (or step-by-step) training on multiple nodes, etc., which will not be described herein.

[0170] For joint training on a single node, the network side device can send the AI model corresponding to the mapping relationship and related information (such as the identifier of the AI model) to the terminal after training is completed.

[0171] For joint training on multiple nodes, the complete model can be jointly trained on the network side device and the terminal by means of interaction of forward / backward propagation information and identification information of the AI model, such as the network side being responsible for updating the AI model (such as a decoder) for CSI demapping, and the terminal side being responsible for updating the AI model (such as an encoder) for CSI mapping.

[0172] For separate (or step-by-step) training on multiple nodes, the network-side device first trains a complete AI model, such as a decoder, and then trains a terminal-side encoder that can be paired with the decoder through interaction of a data set and identification information (such as a data set ID) of the AI model.

[0173] Optionally, in the training phase, the network-side device and the terminal-side device can prepare multiple available models, so that the terminal or the network-side device selects a corresponding AI model as needed to improve flexibility when transmitting CSI based on the AI model.

[0174] S314, the network-side device sends target configuration information to the terminal for the terminal to report CSI.

[0175] The target configuration information can include, but is not limited to, at least one of the following 31)-35).

[0176] 31) CSI to be reported.

[0177] Optionally, the indication of the CSI to be reported can include indicating a measurement resource associated with the CSI to be reported, such as a CSI-RS.

[0178] For example, assuming that the network-side device indicates 8 CSI-RS resources, the terminal can select 4 from the 8 corresponding CSIs to report, i.e., the first CSI to be fed back is 4.

[0179] 32) first information. The first information is used to indicate, but is not limited to, at least one of the following 32a)-32b).

[0180] 32a) reference information of the plurality of first CSIs.

[0181] 32b) a first rule.

[0182] In this example 1, the network-side device indicates the reference information of all first CSIs to the terminal through the first information, and the first information can refer to the related description in the foregoing method embodiment 200, which will not be repeated here.

[0183] 33) third information, used to indicate at least one of the following 33a)-33b).

[0184] 33a) arrangement order of each second CSI.

[0185] 33b) a second rule.

[0186] The third information can refer to the related description in the foregoing method embodiment 200, which will not be repeated here.

[0187] S315, the terminal measures CSIs of each CSI-RS transmitted by the network side device to determine a plurality of first CSIs to be fed back.

[0188] S316, the terminal determines reference information of each of the first CSIs.

[0189] S317, the terminal maps each of the first CSIs based on a mapping relationship and the reference information of each of the first CSIs to obtain a plurality of second CSIs.

[0190] The implementation process of S316-S317 can include: assuming that the measurement resource is a CSI-RS, the network side device instructs the terminal to report CSIs corresponding to CSI-RS0, CSI-RS1, CSI-RS2, and CSI-RS3, such as CSI0, CSI1, CSI2, and CSI3, and indicates that the reference information of CSI0 is empty, i.e., CSI0 does not refer to any information, the reference information of CSI1 is CSI0, the reference information of CSI2 is CSI0 and CSI1, and the reference information of CSI3 is CSI0 and CSI1.

[0191] In this case, when the terminal maps the CSI based on the mapping relationship, it can first map CSI0 to obtain output0 (i.e., second CSI 0) and intermediate information 0 without relying on any reference information, then map CSI1 based on the mapping relationship and using intermediate information 0 (i.e., input intermediate information 0 and CSI1 into the mapping relationship or the AI model corresponding to the mapping relationship) to obtain output1 (i.e., second CSI 1) and intermediate information 10, and finally map CSI2 and CSI3 based on the mapping relationship and using intermediate information 10 to obtain output2 (i.e., second CSI2) and output3 (i.e., second CSI 3). Note that intermediate information 210 and 310 will also be obtained at this time, but since there is no other CSI that needs to be mapped using the above information, intermediate information 210 and 310 can be discarded.

[0192] The mapping relationship for mapping CSI0, CSI1, CSI2, and CSI3 can be the same, thereby ensuring the flexibility of the mapping relationship, reducing the number of mapping relationships required when reporting CSI, and reducing the complexity when configuring or managing the mapping relationship.

[0193] S318, the terminal sorts each of the plurality of second CSIs.

[0194] Wherein, according to S317, the plurality of second CSIs are determined as second CSI0, second CSI1, second CSI2, and second CSI3. In this case, if the terminal determines that the second CSI needs to be sorted according to the second rule according to S314, and the second rule is that the more the reference information used when the first CSI is mapped, the later the second CSI corresponding to the first CSI is sorted, then the terminal sorts the second CSI according to the number of reference information used when the first CSI is mapped, and obtains the sorted second CSI, that is, second CSI0 (0), second CSI1 (1), second CSI2 (2), and second CSI3 (3).

[0195] S319, the terminal sends a CSI report to the network side device, and the CSI includes the plurality of sorted second CSIs.

[0196] S320, after the network side device receives the CSI report from the terminal, the plurality of second CSIs can be separated from the CSI report, and the plurality of second CSIs are demapped based on the demapping relationship and the reference information of the first CSI to obtain the plurality of reconstructed first CSIs.

[0197] Wherein, since the reference information used by the terminal when mapping each of the first CSIs is completely indicated by the network side device, the network side device can know the reference information of each of the first CSIs in advance to demap the second CSIs.

[0198] Exemplarily, assuming that after the network side device receives the CSI report, the second CSI0, the second CSI1, the second CSI2, and the second CSI3 are separated from the CSI report, then the second CSI0 is demapped to the CSI0' and the corresponding intermediate information 0' based on the demapping relationship, the second CSI1 is demapped to the CSI1' and the corresponding intermediate information 10' based on the demapping relationship and the intermediate information 0', and finally the second CSI2 is demapped to the CSI2' based on the demapping relationship and the intermediate information 10', and the third CSI3 is demapped to the CSI3' based on the demapping relationship and the intermediate information 10', thereby completing the whole CSI transmission (or feedback) process.

[0199] Wherein, the demapping relationship for demapping the second CSI0, the second CSI1, the second CSI2, and the second CSI3 can be the same, thereby ensuring the flexibility of using the demapping relationship, reducing the number of demapping relationships required when transmitting the CSI, and reducing the complexity when configuring or managing the demapping relationship.

[0200] It can be understood that the transmission process of the CSI provided in Example 1 can include but is not limited to the foregoing steps, for example, can include more or fewer steps than the foregoing, which is not limited herein.

[0201] Example 2

[0202] Assuming that the network side device indicates the reference information of part of the first CSI to be fed back, the reporting process thereof is as shown in FIG. 3b.

[0203] The implementation process of S321-S323 is the same as that of S311-S313 in the foregoing Example 1, which is not described herein again.

[0204] S324, the network side device sends target configuration information to the terminal, so that the terminal reports CSI.

[0205] The target configuration information can include but is not limited to at least one of the following 51)-55).

[0206] 51) CSI to be reported.

[0207] Optionally, the indication manner of the CSI to be reported can include indicating the measurement resource associated with the CSI to be reported, such as CSI-RS.

[0208] Exemplarily, assuming that the network side device indicates 8 CSI-RS resources, the terminal can select 4 from the 8 corresponding CSI to report, that is, the first CSI to be fed back is 4.

[0209] 52) first information.

[0210] The first information is used to indicate at least one of the following 52a)-52b).

[0211] 52a) reference information of part of the plurality of first CSIs.

[0212] 52b) first rule, the first rule is a rule between other CSIs in the plurality of first CSIs and the reference information of the current first CSI.

[0213] In this Example 2, the network side device indicates the reference information of part of the first CSI to the terminal through the first information, and the first information can refer to the related description in the foregoing method embodiment 200, which is not described herein again.

[0214] 53) third information, used to indicate at least one of the following 53a)-53b).

[0215] 53a) arrangement order of each second CSI.

[0216] 53b) the second rule.

[0217] Wherein, the third information can refer to the relevant description in the foregoing method embodiment 200, which will not be repeated here.

[0218] S325, the terminal measures the CSI of each CSI-RS sent by the network side device to determine a plurality of first CSIs to be fed back.

[0219] S326, the terminal determines the reference information of each of the first CSIs.

[0220] S327, the terminal maps each of the first CSIs based on the mapping relationship and the reference information of each of the first CSIs to obtain a plurality of second CSIs.

[0221] S328, the terminal sorts each of the plurality of second CSIs.

[0222] S329, the terminal sends a CSI report to the network side device, wherein the CSI report includes the plurality of second CSIs sorted and third information.

[0223] The implementation process of the foregoing S326-S329 will be described below in combination with implementation manner 1 and implementation manner 2, and the content is as follows.

[0224] Implementation manner 1

[0225] Suppose that the measurement resource is a CSI-RS, and the network side device configures the terminal with measurement resources: CSI-RS0~CSI-RS7, and indicates that the CSI corresponding to CSI-RS0 and CSI-RS1 is a must-report CSI, and the terminal can also select two from the remaining measurement resources to report. And the protocol stipulates or the network side device indicates that the must-report CSI does not refer to any mapping, that is, the reference information of the must-report CSI is empty, and the optional reportable CSI can use other (must or non-must) CSI as reference information for mapping.

[0226] Then in this case, the terminal can determine that the first CSI to be fed back includes the CSI0 corresponding to the must-report CSI-RS0 and CSI-RS1, the CSI1, and the CSI3 and CSI5 corresponding to the optional reportable CSI-RS3 and CSI-RS5, and the terminal determines that the reference information of CSI3 is CSI-RS0 and the reference information of CSI5 is CSI3 and CSI0 according to the first information in S324.

[0227] Then, the terminal maps CSI0 based on the mapping relationship without relying on any reference information, obtains second CSI0 and intermediate information 0, maps CSI3 based on the mapping relationship and using intermediate information 0 (i.e., taking intermediate information 0 and CSI3 together as the input of the mapping relationship), obtains second CSI3 and intermediate information 30, and finally maps CSI5 based on the mapping relationship and using intermediate information 30, to obtain second CSI5. In addition, the terminal maps CSI1 based on the mapping relationship without relying on any reference information, to obtain second CSI1.

[0228] Finally, in a case where it is determined that the plurality of second CSIs are respectively second CSI0, second CSI1, second CSI3, and second CSI5, if the terminal determines according to S314 that the ordering of the second CSIs needs to be performed according to the second rule, and the second rule is that the more the number of reference information used when the first CSI is mapped, the later the ordering of the second CSI corresponding to the first CSI, the terminal can perform the ordering of the second CSIs according to the number of reference information used when the first CSI is mapped, to obtain the ordered second CSIs, i.e., second CSI0 (0), second CSI1 (0), second CSI3 (1), and second CSI5 (2).

[0229] Based on the foregoing process, when the terminal sends a CSI report to the network side device, the CSI report includes the ordered plurality of second CSIs and third information, where the third information is used to indicate that the reference information of CSI3 is CSI0, and the reference information of CSI5 is CSI3 and CSI0.

[0230] Implementation 2

[0231] Suppose that the measurement resource is CSI-RS, and the network side device configures the terminal with measurement resources CSI-RS0 to CSI-RS7, and instructs the terminal to select 4 to report from the measurement resources. In addition, the network further instructs the terminal through the first information that the terminal can use at most two other CSIs as reference information to map the current first CSI.

[0232] Then in this case, the first CSI that the terminal can feed back includes CSI0, CSI2, CSI4, and CSI6 corresponding to CSI-RS0, CSI-RS2, CSI-RS4, and CSI-RS6, and the terminal autonomously determines that CSI0 is mapped without any reference information, i.e., the reference information of CSI0 is empty, the reference information of CSI2 is CSI0, the reference information of CSI4 is CSI2 and CSI0, and the reference information of CSI6 is CSI2 and CSI0.

[0233] Then, the terminal first maps CSI0 based on the mapping relationship without relying on any reference information to obtain second CSI0 and intermediate information 0, then maps CSI2 based on the mapping relationship and using intermediate information 0 (i.e., taking intermediate information 0 and CSI2 together as the input of the mapping relationship) to obtain second CSI2 and intermediate information 20, finally maps CSI4 based on the mapping relationship and using intermediate information 20 to obtain second CSI4, and maps CSI6 based on the mapping relationship and using intermediate information 20 to obtain second CSI6.

[0234] Finally, in a case where it is determined that the plurality of second CSIs are respectively second CSI0, second CSI2, second CSI4, and second CSI6, if the terminal determines according to S314 that the ordering of the second CSIs needs to be performed according to the second rule, and the second rule is that the more the number of reference information used when mapping the first CSI, the later the ordering of the second CSI corresponding to the first CSI, then the terminal can perform the ordering of the second CSIs according to the number of reference information used when mapping the first CSI to obtain the ordered second CSIs, i.e., second CSI0 (0), second CSI2 (1), second CSI4 (2), and second CSI6 (2).

[0235] Based on the foregoing process, when the terminal sends a CSI report to the network side device, the CSI report includes the ordered plurality of second CSIs and third information, wherein the third information is used to indicate that the reference information of CSI0 is empty, the reference information of CSI2 is CSI0, the reference information of CSI4 is CSI2 and CSI0, and the reference information of CSI6 is CSI2 and CSI0.

[0236] Optionally, in addition to directly indicating all reference information of each CSI through the third information, as an implementation manner, the third information can be used to indicate a second specific CSI, for example, for CSI4, only the second specific CSI, i.e., CSI2, in the reference information of CSI4 can be indicated, and then the network side device can determine according to the second specific CSI that the reference information of CSI4 further includes CSI0.

[0237] It is worth noting that in the mapping process corresponding to the implementation manner 1 or the implementation manner 2, the mapping relationship used for mapping different CSIs can be the same, thereby ensuring the flexibility of using the mapping relationship, reducing the number of mapping relationships required when reporting CSI, and reducing the complexity when configuring or managing the mapping relationship.

[0238] S330, after receiving the CSI report from the terminal, the network side device can separate a plurality of second CSIs from the CSI report, and demap the plurality of second CSIs based on the demapping relationship and the reference information of the first CSI to obtain a plurality of reconstructed first CSIs.

[0239] Exemplarily, corresponding to the foregoing implementation manner 1, assuming that the network side device receives the CSI report, the network side device can first separate the second CSI0, the second CSI1, the second CSI3, and the second CSI5 from the CSI report, and then determine, according to the third information in the CSI report, that the reference information of the CSI3 is the reference information of the CSI0 and the reference information of the CSI5 is the reference information of the CSI3 and the CSI0. Finally, the second CSI0 is demapped into the CSI0' and the corresponding intermediate information 0' based on the demapping relationship, the second CSI1 is demapped into the CSI1' based on the demapping relationship, the second CSI3 is demapped into the CSI3' and the corresponding intermediate information 30' based on the demapping relationship and the intermediate information 0', the second CSI5 is demapped into the CSI5' based on the demapping relationship and the intermediate information 30', thereby completing the whole CSI transmission (or feedback) process.

[0240] Corresponding to the foregoing implementation manner 2, assuming that the network side device receives the CSI report, the network side device can first separate the second CSI0, the second CSI2, the second CSI4, and the second CSI6 from the CSI report, and then determine, according to the third information in the CSI report, that the reference information of the CSI0 is empty, the reference information of the CSI2 is the CSI0, the reference information of the CSI4 is the CSI2 and the CSI0, and the reference information of the CSI6 is the CSI2 and the CSI0. Finally, the second CSI0 is demapped into the CSI0' and the corresponding intermediate information 0' based on the demapping relationship, the second CSI2 is demapped into the CSI2' and the corresponding intermediate information 20' based on the demapping relationship and the intermediate information 0', the second CSI4 is demapped into the CSI4' based on the demapping relationship and the intermediate information 20', and the second CSI6 is demapped into the CSI6' based on the demapping relationship and the intermediate information 20', thereby completing the whole CSI transmission (or feedback) process.

[0241] It is worth noting that in the demapping process corresponding to the implementation manner 1 or the implementation manner 2, the demapping relationship used for demapping different second CSIs can be the same, thereby ensuring the flexibility of using the demapping relationship, reducing the number of demapping relationships required when transmitting the CSI, and reducing the complexity when configuring or managing the demapping relationship.

[0242] It can be understood that the CSI transmission process provided in example 2 can include but is not limited to the foregoing steps, for example, can include more or fewer steps than the foregoing, which is not limited herein.

[0243] Example 3

[0244] Assuming that the mapping relationship is implemented based on an AI model, the plurality of first CSIs to be fed back are CSI0, CSI1, CSI2, and CSI3, the reference information of CSI0 is empty, the reference information of CSI1 is the intermediate information of CSI0, the reference information of CSI2 is the intermediate information of CSI0 and the intermediate information of CSI1, and the reference information of CSI3 is the intermediate information of CSI0, the intermediate information of CSI1, and the intermediate information of CSI2, then the process of CSI mapping performed by the terminal and CSI demapping performed by the network side device is as shown in FIG. 3c.

[0245] The AI model used for mapping of CSI0, CSI1, CSI2, and CSI3 is the same AI model, that is, when mapping, the AI model is first used to map CSI0 into second CSI0, the AI model and the intermediate information 0 of CSI0 are then used to map CSI1 into second CSI1, the AI model and the intermediate information 10 are then used to map CSI2 into second CSI2, and finally the AI model and the intermediate information 210 are used to map CSI3 into second CSI3. The intermediate information 10 includes the intermediate information of CSI0 and CSI1, and the intermediate information 210 includes the intermediate information of CSI0, CSI1, and CSI2.

[0246] The process of CSI demapping on the network side device is similar to the process of CSI mapping on the terminal side, and will not be described here.

[0247] In this example 3, the AI model still maps one CSI at a time, but the reference information needs to be used when mapping and demapping to help improve the mapping performance of the current CSI. The reference information can be other CSIs or intermediate information obtained after processing of other CSIs as shown in FIG. 3c. Based on this, compared with the joint mapping in the related art, the model design in this example 3 is slightly weaker than the mapping performance of mapping multiple CSIs at a time in terms of utilization of CSI correlation, but it has the advantages of high flexibility of model use and low difficulty of model training and management. In particular, the same model can process multiple joint mapping quantities through self-recurrence (this model design can be simply referred to as a “self-recurrence joint mapping model”), thereby reducing the number of AI models required for CSI mapping.

[0248] It is worth noting that the self-recurrence model also needs the network side device and the terminal to align the mapping relationship (such as an encoder) input and the demapping relationship (such as a decoder) output required for each mapping at inference time, to ensure that the network side device can recover the accurate CSI.

[0249] As shown in FIG. 4, a flowchart of a CSI transmission method 400 is provided for an example embodiment of the present application, which can be executed by a network side device, but is not limited thereto, and can be executed by hardware and / or software installed in the network side device. In this embodiment, the method 400 can include at least the following steps.

[0250] S410, the network side device receives a CSI report from a terminal, wherein the CSI report includes a plurality of second CSIs.

[0251] S420, the network side device de-maps each of the second CSIs according to reference information of a first CSI to obtain a plurality of first CSIs.

[0252] The reference information of the first CSI is reference information used when mapping the first CSI to obtain the second CSI, and the reference information of each first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0253] In an embodiment, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI, including at least one of the following: the reference information of the first CSI is a subset of the other CSIs in the plurality of first CSIs except the current first CSI; the reference information of the first CSI is a subset of related information of the other CSIs in the plurality of first CSIs except the current first CSI.

[0254] In an embodiment, the CSI report further includes third information, and the reference information of the first CSI is determined according to the third information, wherein the third information is used to indicate reference information of at least one CSI in the plurality of first CSIs.

[0255] In an embodiment, the third information includes at least one of the following: third indication information used to indicate a second specific CSI, wherein the second specific CSI is a CSI related to the reference information of the first CSI, which is mapped before the first CSI in the mapping order and is closest to the first CSI in the mapping order; and reference information of each first CSI.

[0256] In an embodiment, the method further includes: the network side device sends first information to the terminal, wherein the first information is used to indicate at least one of the following: reference information of at least one CSI in the plurality of first CSIs; and a first rule between the reference information of the current first CSI and reference information of other CSIs in the plurality of first CSIs except the current first CSI.

[0257] In an embodiment, in the case that the first information is used to indicate the reference information of at least one of the first CSIs, the first information comprises any of the following: first indication information used to indicate a mapping order of the first CSIs, the mapping order being used to determine the reference information of the first CSIs; second indication information used to indicate a first specific CSI, wherein the first specific CSI is a CSI related to the reference information of the first CSI, and the mapping order of the first specific CSI is in front of the mapping order of the first CSI and is closest to the mapping order of the first CSI; and the reference information of the first CSIs.

[0258] In an embodiment, the first rule comprises at least one of the following: a number of CSIs related to the reference information of one of the first CSIs is not more than a first threshold; a number of CSIs related to the reference information of a third CSI is different from a number of CSIs related to the reference information of a fourth CSI, the third CSI being a first CSI that must be reported, and the fourth CSI being a first CSI that can be reported; and the reference information of the first CSI is related to all CSIs in front of the mapping order of the first CSI.

[0259] In an embodiment, in the case that the first information is used to indicate the first rule, the first information comprises at least one of the following: a first identifier used to identify the first rule; and first description information used to describe content in the first rule.

[0260] In an embodiment, the method further comprises: the network side device sending second information to the terminal; wherein the second information is used to indicate at least one of the following: ordering information of the second CSIs; and a second rule between the reference information of each of the first CSIs and the second CSIs.

[0261] In an embodiment, the second rule comprises at least one of the following: ordering the second CSIs according to whether the reference information is used when each of the first CSIs is mapped; and ordering the second CSIs according to a number of reference information used when each of the first CSIs is mapped.

[0262] In an embodiment, in the case that the second information is used to indicate the second rule, the second information comprises at least one of the following: a second identifier used to identify the second rule; and second description information used to describe content in the second rule.

[0263] The embodiments mentioned in the method embodiment 400 have the same or corresponding technical features as the foregoing method embodiment 200, and therefore, the implementation of the embodiments in the method embodiment 400 can refer to the related description in the foregoing method embodiment 200 and achieve the same or corresponding technical effects. To avoid repetition, the details are not described here again.

[0264] The CSI transmission method provided in the embodiments of the present application can be executed by a CSI transmission device. In the embodiments of the present application, the CSI transmission method executed by the CSI transmission device is taken as an example to illustrate the CSI transmission device provided in the embodiments of the present application.

[0265] The CSI transmission device provided in the embodiments of the present application can be a communication device or a component in a communication device, such as a chip, as an example. The communication device can be a terminal, a network side device, a server, or the like. For example, the terminal can include, but is not limited to, the types of the terminal 11 listed above, the network side device can include, but is not limited to, the types of the network side device 12 listed above, and the embodiments of the present application do not make specific limitations.

[0266] The CSI transmission device includes a transmission module (such as a receiving module, a sending module) and a processing module. The receiving module, the sending module and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, which can include a general-purpose processor, a special-purpose processor, or the like, such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, or the like. The receiving module and the sending module can be implemented by a communication interface, which can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, or the like.

[0267] Specifically, referring to FIG. 5, when the CSI transmission device is a terminal or a component in a terminal, the CSI transmission device 500 includes a processing module 510 configured to determine reference information of a plurality of first CSIs to be fed back; the processing module 510 is further configured to respectively map each of the first CSIs according to the reference information of each of the first CSIs to obtain a plurality of second CSIs; and a transmission module 520 configured to send a CSI report to a network side device, the CSI report including the plurality of second CSIs; wherein for each of the first CSIs, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0268] In an embodiment, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI, including at least one of the following: the reference information of the first CSI is a subset of the related information of the other CSIs in the plurality of first CSIs except the current first CSI; and the reference information of the first CSI is a subset of the related information of the other CSIs in the plurality of first CSIs except the current first CSI.

[0269] In an embodiment, the determining of the reference information of the plurality of first CSIs to be fed back includes: determining the reference information of the plurality of first CSIs to be fed back according to first information; wherein the first information is used to indicate at least one of the following: reference information of at least one CSI in the plurality of first CSIs; and a first rule, the first rule being a rule between the reference information of the current first CSI and the other CSIs in the plurality of first CSIs except the current first CSI.

[0270] In an embodiment, in the case that the first information is used to indicate the reference information of at least one CSI in the plurality of first CSIs, the first information includes at least one of the following: first indication information used to indicate a mapping order of the plurality of first CSIs, the mapping order being used to determine the reference information of the first CSI; second indication information used to indicate a first specific CSI, wherein the first specific CSI is a CSI related to the reference information of each of the first CSIs, the mapping order of which is located before the mapping order of the first CSI and closest to the mapping order of the first CSI; and the reference information of the plurality of first CSIs.

[0271] In an embodiment, the first rule comprises at least one of the following: a quantity of CSI related to reference information of one of the first CSI does not exceed a first threshold; a quantity of CSI related to reference information of a third CSI, which is the first CSI that must be reported, is different from a quantity of CSI related to reference information of a fourth CSI, which is the first CSI that can be reported; the reference information of the first CSI is related to all CSI that is mapped before the first CSI in a mapping order.

[0272] In an embodiment, in a case where the first information is used to indicate the first rule, the first information comprises at least one of the following: a first identifier used to identify the first rule; first description information used to describe content in the first rule.

[0273] In an embodiment, the sending of the CSI report to the network side device comprises: sorting the second CSI by using second information; and sending, by the terminal, the CSI report to the network side device, wherein the CSI report comprises the second CSI sorted by using the second information; and wherein the second information is used to indicate at least one of the following: sorting information of the second CSI; and a second rule between the reference information of each of the first CSI and the second CSI.

[0274] In an embodiment, the second rule comprises at least one of the following: sorting the second CSI according to whether the reference information is used when each of the first CSI is mapped; and sorting the second CSI according to a quantity of reference information used when each of the first CSI is mapped.

[0275] In an embodiment, in a case where the second information is used to indicate the second rule, the second information comprises at least one of the following: a second identifier used to identify the second rule; and second description information used to describe content of the second rule.

[0276] In an embodiment, a manner of obtaining the first information or the second information comprises at least one of the following: a protocol agreement; and configuration or indication by the network side device.

[0277] In an embodiment, the CSI report further comprises third information used to indicate reference information of at least one of the first CSI.

[0278] In an embodiment, the third information comprises at least one of the following: third indication information used for indicating a second specific CSI, wherein the second specific CSI is a CSI that is mapped in a sequence before the first CSI in a sequence of CSIs related to the reference information of the first CSI and is closest to the first CSI in the sequence; and reference information of the first CSI.

[0279] In an embodiment, a mapping relationship when the first CSI is mapped according to the reference information of each first CSI to be fed back is implemented based on an artificial intelligence (AI) model; wherein the AI model comprises at least one of the following: an AI model used by the terminal; a reference AI model of the AI model used by the terminal; an AI model used by the terminal or test equipment in testing; and a reference AI model of the AI model used by the terminal or test equipment in testing.

[0280] The CSI transmission apparatus 500 provided by the embodiments of the present application can implement each process of the method embodiment of FIG. 2 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0281] Referring to FIG. 6, when the CSI transmission apparatus is a network side device or a component in the network side device, the CSI transmission apparatus 600 comprises a transmission module 610 configured to receive a CSI report from a terminal, wherein the CSI report comprises a plurality of second CSIs; and a processing module 620 configured to demap each second CSI according to reference information of a first CSI to obtain a plurality of first CSIs, wherein the reference information of the first CSI is reference information used when the first CSI is mapped to obtain the second CSI, and the reference information of each first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI.

[0282] In an embodiment, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI, comprising at least one of the following: the reference information of the first CSI is a subset of other CSIs in the plurality of first CSIs except the current first CSI; and the reference information of the first CSI is a subset of related information of other CSIs in the plurality of first CSIs except the current first CSI.

[0283] In an embodiment, the CSI report further comprises third information, and the reference information of the first CSI is determined according to the third information, wherein the third information is used for indicating reference information of at least one CSI in the plurality of first CSIs.

[0284] In an embodiment, the third information comprises at least one of the following: third indication information, used for indicating a second specific CSI, wherein the second specific CSI is a CSI, which is related to the reference information of the first CSI, has a mapping sequence before the mapping sequence of the first CSI, and is closest to the mapping sequence of the first CSI; and the reference information of each of the first CSIs.

[0285] In an embodiment, the transmission module 610 is further configured to: send first information to the terminal; wherein the first information is used for indicating at least one of the following: reference information of at least one of the first CSIs; and a first rule between other CSIs of the first CSIs except a current first CSI and the reference information of the current first CSI.

[0286] In an embodiment, when the first information is used for indicating the reference information of at least one of the first CSIs, the first information comprises any one of the following: first indication information, used for indicating a mapping sequence of the first CSIs, the mapping sequence being used for determining the reference information of the first CSIs; second indication information, used for indicating a first specific CSI, wherein the first specific CSI is a CSI, which is related to the reference information of each of the first CSIs, has a mapping sequence before the mapping sequence of the first CSI, and is closest to the mapping sequence of the first CSI; and the reference information of the first CSIs.

[0287] In an embodiment, the first rule comprises at least one of the following: a number of CSIs related to the reference information of one of the first CSIs is not more than a first threshold; a number of CSIs related to the reference information of a third CSI is different from a number of CSIs related to the reference information of a fourth CSI, the third CSI being a first CSI which must be reported, and the fourth CSI being a first CSI which can be optionally reported; and the reference information of the first CSI is related to all CSIs having mapping sequences before the first CSI.

[0288] In an embodiment, when the first information is used for indicating the first rule, the first information comprises at least one of the following: first identification, used for identifying the first rule; and first description information, used for describing content in the first rule.

[0289] In an embodiment, the transmission module 610 is further configured to: send second information to the terminal; wherein the second information is used for indicating at least one of the following: ordering information of the second CSIs; and a second rule between the reference information of each of the first CSIs and the second CSIs.

[0290] In an embodiment, the second rule comprises at least one of the following: sorting the second CSI according to whether the reference information is used in each of the first CSI mapping time; and sorting the second CSI according to a number of reference information used in each of the first CSI mapping time.

[0291] In an embodiment, when the second information is used to indicate the second rule, the second information comprises at least one of the following: a second identifier used to identify the second rule; and second description information used to describe a content of the second rule.

[0292] The CSI transmission apparatus 600 provided by the embodiments of the present application can implement each process of the method embodiment of FIG. 4 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0293] As shown in FIG. 7, the embodiments of the present application further provide a communication device 700, which comprises a processor 701 and a memory 702, and the memory 702 stores programs or instructions executable on the processor 701. For example, when the communication device 700 is a terminal, the programs or instructions are executed by the processor 701 to implement each step of the CSI transmission method embodiments described above and achieve the same technical effects. When the communication device 700 is a network side device, the programs or instructions are executed by the processor 701 to implement each step of the CSI transmission method embodiments described above and achieve the same technical effects. To avoid repetition, details are not described herein.

[0294] The embodiments of the present application further provide a terminal, which comprises a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the steps in the method embodiment shown in FIG. 2. The terminal embodiment corresponds to the terminal side method embodiment described above, and each implementation process and implementation manner of the method embodiment described above can be applied to the terminal embodiment and achieve the same technical effects. The terminal can be the CSI transmission apparatus 500 shown in FIG. 5. Specifically, FIG. 8 is a hardware structure schematic diagram of a terminal implementing the embodiments of the present application.

[0295] The terminal 800 includes, but is not limited to, at least one of 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 a processor 810.

[0296] Those skilled in the art can understand that the terminal 800 can also include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 810 through a power management system, so that the power management system can realize the functions of managing charging, discharging and power consumption management. The terminal structure shown in FIG. 8 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than the illustrated components, or combine certain components, or different component arrangements, which will not be described here.

[0297] It should be understood that in the embodiments of the present application, the input unit 804 can include a graphics processor 8041 and a microphone 8042, and the graphics processor 8041 processes image data of a still picture or a 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 can include a display panel 8061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 can include two parts of a touch detection device and a touch controller. The other input devices 8072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, which will not be described here.

[0298] In the embodiments of the present application, after the radio frequency unit 801 receives the downlink data from the network side device, it can be transmitted to the processor 810 for processing. In addition, the radio frequency unit 801 can send uplink data to the network side device. Generally, 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, etc.

[0299] The memory 809 can be used to store software programs or instructions and various data. The memory 809 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 809 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 809 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0300] The processor 810 can include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 810.

[0301] The processor 810 is configured to determine reference information of a plurality of first CSI to be fed back, and map each of the first CSI according to the reference information of the first CSI to obtain a plurality of second CSI. The radio frequency unit 801 is configured to send a CSI report to a network side device, wherein the CSI report includes the plurality of second CSI. For each of the first CSI, the reference information of the first CSI is related to other CSI in the plurality of first CSI except the current first CSI.

[0302] In an embodiment, the reference information of the first CSI is related to other CSI in the plurality of first CSI except the current first CSI, including at least one of: the reference information of the first CSI is a subset of the reference information of the other CSI in the plurality of first CSI except the current first CSI; the reference information of the first CSI is a subset of the related information of the other CSI in the plurality of first CSI except the current first CSI.

[0303] In an embodiment, the determining the reference information of the plurality of first CSI to be fed back includes: determining the reference information of the plurality of first CSI to be fed back according to first information; wherein the first information is used to indicate at least one of: the reference information of at least one CSI in the plurality of first CSI; a first rule, the first rule is a rule between the reference information of the other CSI in the plurality of first CSI except the current first CSI and the current first CSI.

[0304] In an embodiment, in the case that the first information is used to indicate the reference information of at least one CSI in the plurality of first CSI, the first information includes at least one of: first indication information, used to indicate a mapping order of the plurality of first CSI, the mapping order is used to determine the reference information of the first CSI; second indication information, used to indicate a first specific CSI, wherein the first specific CSI is a CSI related to the reference information of each first CSI, the mapping order of which is located before the mapping order of the first CSI and is closest to the mapping order of the first CSI; the reference information of the plurality of first CSI.

[0305] In an embodiment, the first rule includes at least one of: the number of CSI related to the reference information of one first CSI does not exceed a first threshold; the number of CSI related to the reference information of a third CSI is different from the number of CSI related to the reference information of a fourth CSI, the third CSI is the first CSI that must be reported, and the fourth CSI is the first CSI that can be optionally reported; the reference information of the first CSI is related to all CSI whose mapping order is before the first CSI.

[0306] In an embodiment, in the case that the first information is used to indicate the first rule, the first information includes at least one of: a first identifier, used to identify the first rule; first description information, used to describe the content in the first rule.

[0307] In an embodiment, the sending the CSI report to the network-side device comprises: sorting the multiple second CSIs according to the second information; and sending the CSI report to the network-side device, wherein the sorted multiple second CSIs are included in the CSI report; and wherein the second information is used to indicate at least one of: sorting information of the multiple second CSIs; and a second rule between the reference information of each first CSI and the multiple second CSIs.

[0308] In an embodiment, the second rule comprises at least one of: sorting each second CSI according to whether the reference information is used when mapping each first CSI; and sorting each second CSI according to a number of reference information used when mapping each first CSI.

[0309] In an embodiment, when the second information is used to indicate the second rule, the second information comprises at least one of: a second identifier used to identify the second rule; and second description information used to describe content of the second rule.

[0310] In an embodiment, the manner of obtaining the first information comprises at least one of: obtaining the first information agreed by a protocol; and obtaining the first information from the network-side device.

[0311] In an embodiment, the CSI report further comprises third information used to indicate reference information of at least one CSI in the multiple first CSIs.

[0312] In an embodiment, the third information comprises at least one of: third indication information used to indicate a second specific CSI, wherein the second specific CSI is a CSI related to the reference information of each first CSI, and is located in front of the mapping order of the first CSI and is closest to the mapping order of the first CSI; and the reference information of each first CSI.

[0313] In an embodiment, a mapping relationship when mapping each first CSI according to the reference information of each first CSI to be fed back is implemented based on an artificial intelligence (AI) model; and wherein the AI model comprises at least one of: an AI model used by the terminal; a reference AI model of the AI model used by the terminal; an AI model used by the terminal or test equipment in testing; and a reference AI model of the AI model used by the terminal or test equipment in testing.

[0314] It can be understood that the implementation process of each implementation mode mentioned in the embodiment can refer to the related description of the method embodiment 200 and achieve the same or corresponding technical effects. To avoid repetition, it will not be described here.

[0315] The embodiment of the application further provides a network side device, comprising a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run programs or instructions, and the steps of the method embodiment shown in FIG. 4 are realized. The network side device embodiment corresponds to the network side device method embodiment described above. Each implementation process and implementation mode of the above method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

[0316] Specifically, the embodiment of the application further provides a network side device, which can be the CSI transmission device shown in FIG. 6. As shown in FIG. 9, the network side device 900 comprises an antenna 901, a radio frequency device 902, a baseband device 903, a processor 904 and a memory 905. The antenna 901 is connected with the radio frequency device 902. In the uplink direction, the radio frequency device 902 receives information through the antenna 901, and sends the received information to the baseband device 903 for processing. In the downlink direction, the baseband device 903 processes the information to be sent and sends it to the radio frequency device 902. The radio frequency device 902 processes the received information and sends it out through the antenna 901.

[0317] The method performed by the network side device 900 in the above embodiment can be implemented in the baseband device 903, which comprises a baseband processor.

[0318] The baseband device 903 may, for example, comprise at least one baseband board, and a plurality of chips are arranged on the baseband board, as shown in FIG. 9. One of the chips is, for example, a baseband processor, which is connected with the memory 905 through a bus interface to call the programs in the memory 905 and execute the network device operations shown in the above method embodiment.

[0319] The network side device 900 can further comprise a network interface 906, which is, for example, a common public radio interface (Common Public Radio Interface, CPRI).

[0320] Specifically, the network side device 900 of the embodiment of the application further comprises instructions or programs stored in the memory 905 and executable on the processor 904. The processor 904 calls the instructions or programs in the memory 905 to execute the method performed by each module shown in FIG. 6, and achieves the same technical effects. To avoid repetition, it will not be described here.

[0321] The embodiment of the present application further provides a readable storage medium, which stores a program or instructions, and the program or instructions are executed by a processor to realize each process of the CSI transmission method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein.

[0322] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0323] The embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used to run a program or instructions to realize each process of the CSI transmission method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein.

[0324] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0325] The embodiment of the present application further provides a computer program / program product, which is stored in a storage medium and is executed by at least one processor to realize each process of the CSI transmission method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein.

[0326] The embodiment of the present application further provides a wireless communication system, which includes a terminal and a network side device. The terminal can be used to realize each process of the CSI transmission method embodiment 200, and the network side device can be used to realize each process of the CSI transmission method embodiment 400 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0327] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the methods and apparatuses of the present application can be carried out by specific hardware, by software, or by a combination of hardware and software. It is therefore, contemplated to this patent to cover any and all modifications, variations, or equivalents that fall within the scope of the present application. Accordingly, where a concept can have been illustrated in only one of the exemplary embodiments, various aspects of the concept can be modified and / or combined to produce a variety of other embodiments that are not specifically illustrated. Thus, for purposes of describing particular embodiments, reference has been made to orientations. However, it is to be understood that the teachings of this patent are not limited in their application to any one of the mentioned orientations, but are applicable to any assembly having the features currently described or hereinafter ascertained.

[0328] From the above description of the embodiments, it is apparent that the method of the above embodiments can be realized by means of a computer software product and a general hardware platform as necessary, of course, also by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making a terminal or a network side device execute the method described in each embodiment of the present application.

[0329] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims, and these embodiments all belong to the protection scope of the present application.

Claims

1. A method for transmitting channel state information (CSI), comprising: determining, by a terminal, reference information of a plurality of first CSI to be fed back; mapping, by the terminal, each of the first CSI according to the reference information of the first CSI, to obtain a plurality of second CSI; sending, by the terminal, a CSI report to a network side device, wherein the CSI report comprises the plurality of second CSI; wherein, for each of the first CSI, the reference information of the first CSI is related to other CSI in the plurality of first CSI except the current first CSI.

2. The method of claim 1, wherein, The reference information of the first CSI is related to other CSI in the plurality of first CSI except the current first CSI, comprising at least one of: the reference information of the first CSI is a subset of other CSI in the plurality of first CSI except the current first CSI; the reference information of the first CSI is a subset of related information of other CSI in the plurality of first CSI except the current first CSI.

3. The method of claim 1 or 2, wherein, The terminal determines the reference information of the plurality of first CSI to be fed back, comprising: determining, by the terminal, the reference information of the plurality of first CSI to be fed back according to first information; wherein, the first information is used to indicate at least one of: reference information of at least one CSI in the plurality of first CSI; a first rule, wherein the first rule is a rule between reference information of other CSI in the plurality of first CSI except the current first CSI and the current first CSI.

4. The method of claim 3, wherein, In the case that the first information is used to indicate the reference information of at least one CSI in the plurality of first CSI, the first information comprises at least one of: first indication information, used to indicate a mapping order of the plurality of first CSI, wherein the mapping order is used to determine the reference information of the first CSI; second indication information, used to indicate a first specific CSI, wherein the first specific CSI is a CSI related to the reference information of each of the first CSI, and the mapping order of the first specific CSI is before the mapping order of the first CSI and is closest to the mapping order of the first CSI; the reference information of the first CSI.

5. The method of claim 3, wherein, The first rule comprises at least one of: a number of CSI related to the reference information of one of the first CSI does not exceed a first threshold; a number of CSI related to reference information of a third CSI is different from a number of CSI related to reference information of a fourth CSI, wherein the third CSI is a first CSI that must be reported, and the fourth CSI is a first CSI that can be reported; the reference information of the first CSI is related to all CSI before the first CSI in the mapping order.

6. The method of claim 3 or 5, wherein, In the case that the first information is used to indicate the first rule, the first information comprises at least one of: a first identifier, used to identify the first rule; first description information, used to describe content in the first rule.

7. The method of any one of claims 1-6, wherein, The terminal sends the CSI report to the network side device, comprising: sorting, by the terminal, the plurality of second CSI according to second information; The terminal sends a CSI report to the network side device, wherein the CSI report includes the ranked multiple second CSIs. The second information is used to indicate at least one of the following: Ranking information of the multiple second CSIs; A second rule, which is a rule between the reference information of each first CSI and the multiple second CSIs.

8. The method of claim 7, wherein, The second rule includes at least one of the following: Ranking each second CSI according to whether the reference information is used when mapping each first CSI; Ranking each second CSI according to the number of reference information used when mapping each first CSI.

9. The method of claim 7 or 8, wherein, In the case where the second information is used to indicate the second rule, the second information includes at least one of the following: A second identifier, used to identify the second rule; Second description information, used to describe the content of the second rule.

10. The method of any one of claims 3-9, wherein, The acquisition mode of the first information or the second information includes at least one of the following: Protocol agreement; Configuration or indication of the network side device.

11. The method of any one of claims 1-10, wherein, The CSI report further includes third information, which is used to indicate the reference information of at least one CSI in the multiple first CSIs.

12. The method of claim 11, wherein, The third information includes at least one of the following: Third indication information, used to indicate a second specific CSI, wherein the second specific CSI is a CSI related to the reference information of each first CSI, which is mapped before the mapping order of the first CSI and is closest to the mapping order of the first CSI; The reference information of the first CSI.

13. The method of any one of claims 1-12, wherein, The mapping relationship of the terminal when mapping each first CSI according to the reference information of each first CSI to be fed back is realized based on an artificial intelligence (AI) model; The AI model includes at least one of the following: An AI model used by the terminal; A reference AI model of an AI model used by the terminal; An AI model used by the terminal or a test device in testing; A reference AI model of an AI model used by the terminal or a test device in testing.

14. A channel state information (CSI) transmission method, comprising: A network side device receives a CSI report from a terminal, wherein the CSI report includes multiple second CSIs; The network side device demaps each second CSI according to the reference information of a first CSI to obtain multiple first CSIs; The reference information of the first CSI is the reference information used when mapping the first CSI to obtain the second CSI, and the reference information of each first CSI is related to other CSIs in the multiple first CSIs except the current first CSI.

15. The method of claim 14, wherein, The reference information of the first CSI is related to other CSIs in the multiple first CSIs except the current first CSI, including at least one of the following: The reference information of the first CSI is a subset of other CSIs in the multiple first CSIs except the current first CSI; The reference information of the first CSI is a subset of the related information of other CSIs in the multiple first CSIs except the current first CSI.

16. The method of claim 14 or 15, wherein, The CSI report further comprises third information, reference information of the first CSI being determined according to the third information, the third information being used for indicating reference information of at least one CSI in the plurality of first CSIs.

17. The method of claim 16, wherein, The third information comprises at least one of: third indication information used for indicating a second specific CSI, wherein the second specific CSI is a CSI that is related to the reference information of the first CSI, has a mapping sequence before the mapping sequence of the first CSI, and is closest to the mapping sequence of the first CSI; reference information of each of the first CSIs.

18. The method of any one of claims 15-17, wherein, The method further comprises: The network-side device sends first information to the terminal; The first information is used for indicating at least one of: reference information of at least one CSI in the plurality of first CSIs; a first rule between other CSIs in the plurality of first CSIs and reference information of a current first CSI.

19. The method of claim 18, wherein, In a case where the first information is used for indicating reference information of at least one CSI in the plurality of first CSIs, the first information comprises any of: first indication information used for indicating mapping sequences of the plurality of first CSIs, the mapping sequences being used for determining reference information of the first CSI; second indication information used for indicating a first specific CSI, wherein the first specific CSI is a CSI that is related to reference information of each of the first CSIs, has a mapping sequence before the mapping sequence of the first CSI, and is closest to the mapping sequence of the first CSI; reference information of the first CSI.

20. The method of claim 18, wherein, The first rule comprises at least one of: a number of CSIs related to reference information of one of the first CSIs does not exceed a first threshold value; a number of CSIs related to reference information of a third CSI is different from a number of CSIs related to reference information of a fourth CSI, the third CSI being a first CSI that must be reported, and the fourth CSI being a first CSI that can be optionally reported; reference information of the first CSI is related to all CSIs before the first CSI in the mapping sequence.

21. The method of claim 18 or 20, wherein, In a case where the first information is used for indicating the first rule, the first information comprises at least one of: first identification used for identifying the first rule; first description information used for describing content in the first rule.

22. The method of any one of claims 14-21, wherein, The method further comprises: The network-side device sends second information to the terminal; The second information is used for indicating at least one of: ordering information of the plurality of second CSIs; a second rule between reference information of each of the first CSIs and the plurality of second CSIs.

23. The method of claim 22, wherein, The second rule comprises at least one of: ordering the plurality of second CSIs according to whether the reference information is used when each of the first CSIs is mapped; ordering the plurality of second CSIs according to a number of reference information used when each of the first CSIs is mapped.

24. The method of claim 22, wherein, In a case where the second information is used for indicating the second rule, the second information comprises at least one of: a second identifier, used for identifying the second rule; second description information, used for describing a content of the second rule. 25.A device for transmitting channel state information (CSI), comprising: a processing module, configured to determine reference information of a plurality of first CSIs to be fed back; the processing module is further configured to map each of the first CSIs according to the reference information of the first CSI, to obtain a plurality of second CSIs; a transmitting module, configured to transmit a CSI report to a network side device, wherein the CSI report comprises the plurality of second CSIs; wherein, for each of the first CSIs, the reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI.

26. The apparatus of claim 25, wherein, The reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI, comprising at least one of: the reference information of the first CSI is a subset of other CSIs in the plurality of first CSIs except the current first CSI; the reference information of the first CSI is a subset of related information of other CSIs in the plurality of first CSIs except the current first CSI.

27. The apparatus of claim 25 or 26, wherein, The determination of the reference information of the plurality of first CSIs to be fed back comprises: determination of the reference information of the plurality of first CSIs to be fed back according to first information; wherein, the first information is used for indicating at least one of: reference information of at least one of the plurality of first CSIs; a first rule, the first rule is a rule between reference information of other CSIs in the plurality of first CSIs except the current first CSI and the current first CSI. 28.A device for transmitting channel state information (CSI), comprising: a transmitting module, configured to receive a CSI report from a terminal, wherein the CSI report comprises a plurality of second CSIs; a processing module, configured to demap each of the second CSIs according to reference information of a first CSI, to obtain a plurality of first CSIs; wherein, the reference information of the first CSI is reference information used when the first CSI is mapped to obtain the second CSI, and reference information of each of the first CSIs is related to other CSIs in the plurality of first CSIs except the current first CSI.

29. The apparatus of claim 28, wherein, The reference information of the first CSI is related to other CSIs in the plurality of first CSIs except the current first CSI, comprising at least one of: the reference information of the first CSI is a subset of other CSIs in the plurality of first CSIs except the current first CSI; the reference information of the first CSI is a subset of related information of other CSIs in the plurality of first CSIs except the current first CSI.

30. The apparatus of claim 28 or 29, wherein, The CSI report further comprises third information, the reference information of the first CSI is determined according to the third information, and the third information is used for indicating reference information of at least one of the plurality of first CSIs.

31. The apparatus of claim 30, wherein, The third information comprises at least one of: a third indication information, used for indicating a second specific CSI, wherein the second specific CSI is a CSI which is related to the reference information of the first CSI, has a mapping sequence before the mapping sequence of the first CSI, and is closest to the mapping sequence of the first CSI; reference information of each of the first CSIs.

32. The apparatus of any one of claims 28-31, wherein, The transmission module is further configured to send first information to the terminal. The first information is used for indicating at least one of the following: reference information of at least one CSI of the multiple first CSIs; a first rule, which is a rule between the reference information of the current first CSI and other CSIs of the multiple first CSIs except the current first CSI.

33. A terminal comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions being executed by the processor to implement the steps of the method according to any one of claims 1 to 13.

34. A network side device comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions being executed by the processor to implement the steps of the method according to any one of claims 14 to 24.

35. A readable storage medium, the readable storage medium storing programs or instructions, the programs or instructions being executed by a processor to implement the steps of the method according to any one of claims 1 to 13, or to implement the steps of the method according to any one of claims 14 to 24.

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