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

Abstract

Disclosed are a channel state information (CSI) transmission method, a terminal, and a network side device, belonging to the technical field of communications. The method comprises: a terminal jointly maps a plurality of pieces of first CSI to second CSI; and the terminal sends a CSI report to a network side device, wherein the CSI report comprises the second CSI, and the plurality of pieces of first CSI respectively correspond to or are associated with different measurement resources.

Description

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

[0001] Cross-reference

[0002] The present application claims priority to the Chinese patent application No. 202411271814.9, filed on September 11, 2024, and entitled "Transmission method, terminal and network side device of channel state information (CSI)", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0004] In the related art, a terminal can measure a reference signal and feed back a CSI obtained by measurement to a network side device, such as a base station, so that the network side device can accurately and efficiently perform data scheduling according to the received CSI.

[0005] However, in the CSI feedback process provided in the related art, there is still a problem of large resource overhead. SUMMARY

[0006] The present application provides a transmission method, terminal and network side device of CSI, which can reduce the resource overhead in the CSI feedback process.

[0007] In a first aspect, a transmission method of CSI is provided, comprising: a terminal jointly mapping a plurality of first CSIs into a second CSI; and the terminal sending a CSI report to a network side device; wherein the CSI report comprises the second CSI, and the plurality of first CSIs correspond to or are associated with different measurement resources respectively.

[0008] In a second aspect, a transmission method of CSI is provided, comprising: a network side device receiving a CSI report from a terminal, wherein the CSI report comprises a second CSI; and the network side device demapping the second CSI into a plurality of first CSIs; wherein the plurality of first CSIs correspond to or are associated with different measurement resources respectively.

[0009] In a third aspect, a transmission device of CSI is provided, comprising: a processing module configured to jointly map a plurality of first CSIs into a second CSI; and a transmission module configured to send a CSI report to a network side device; wherein the CSI report comprises the second CSI, and the plurality of first CSIs correspond to or are associated with different measurement resources respectively.

[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 second CSI; and a processing module configured to de-map the second CSI into a plurality of first CSIs, wherein the plurality of first CSIs correspond to or are associated with different measurement resources, respectively.

[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, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method of the first aspect.

[0013] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is configured to jointly map a plurality of first CSIs into a second CSI, and the communication interface is configured to send a CSI report to a network-side device, wherein the CSI report comprises the second CSI, and the plurality of first CSIs correspond to or are associated with different measurement resources, respectively.

[0014] In an eighth aspect, a network-side device is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method of the second aspect.

[0015] In a ninth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the communication interface is configured to receive a CSI report from a terminal, wherein the CSI report comprises a second CSI, and the processor is configured to de-map the second CSI into a plurality of first CSIs, wherein the plurality of first CSIs correspond to or are associated with different measurement resources, respectively.

[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 of the first aspect, or implement the steps of the method of the second aspect.

[0017] In an eleventh aspect, a wireless communication system is provided, comprising a terminal and a network-side device, wherein the terminal is configured to perform the steps of the method of the first aspect, and the network-side device is configured to perform the steps of the method of the second aspect.

[0018] In a twelfth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is configured to run programs or instructions to implement the method in the first aspect or implement the method in the second aspect.

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

[0020] In the embodiments of the present application, the terminal reports the joint mapping of the multiple first CSIs corresponding to different measurement resources, which can effectively reduce the resource overhead in CSI reporting. 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. 4 is a flow schematic diagram of a CSI transmission method according to an example embodiment of the present application.

[0026] FIG. 5 is a structural schematic diagram of a CSI device according to an example embodiment of the present application.

[0027] FIG. 6 is a structural schematic diagram of a CSI device according to an example embodiment of the present application.

[0028] FIG. 7 is a structural schematic diagram of a communication device according to an example embodiment of the present application.

[0029] FIG. 8 is a structural schematic diagram of a terminal according to an example embodiment of the present application.

[0030] FIG. 9 is a structural schematic diagram of a network side device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0031] 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.

[0032] 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 an "or" relationship.

[0033] 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 specific information, operation to be performed or request result, etc. in the sent indication; 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 according to the judgment result.

[0034] 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 example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0035] ​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.

[0036] 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.

[0037] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices jointly, and the embodiments of the present application do not make a specific limitation hereon. 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).

[0038] In addition, for the convenience of understanding, the related technical features involved in the present application are described herein.

[0039] 1. CSI compression feedback technology

[0040] 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.

[0041] 1) Type I codebook

[0042] 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.

[0043] 2) Type 2 codebook

[0044] 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.

[0045] 3) e type 2 codebook

[0046] 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.

[0047] 2. Artificial Intelligence (AI) unit

[0048] 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.

[0049] Considering the above characteristics of the two-end model, the following types of training collaboration are basically determined at present.

[0050] 1) Joint training at single entity (or type 1)

[0051] The joint training at single entity refers to training a complete encoder and 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.

[0052] 2) Joint training at multiple entities (or type 2)

[0053] 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 perform model transfer.

[0054] 3) Separate training at multiple entities (or type 3)

[0055] The separate training on multiple nodes refers to training a reference model on a certain node first, sending the relevant information of the reference model to the target node, and finally training the 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 for future actual use, and then sends the 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.

[0056] The training framework can be further divided into two cases: UE-first training and NW-first training. UE-first training refers to training a complete model on the UE side first, and then sending the information required by the model matched by the NW training (generally the input and output data of the model to be trained on the NW side) to the NW side. In contrast, NW-first training refers to training a complete model on the NW side first, and then sending the information required by the model matched by the UE training (generally the input and output data of the model to be trained on the UE side) to the UE side.

[0057] It is worth noting that the AI unit mentioned in the context of the present application can also be referred to as an AI model, 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, etc. Alternatively, the AI unit / AI model can refer to a processing unit that can implement specific algorithms, formulas, processing flows, capabilities, etc. related to AI, or the AI unit / AI model can be a processing method, algorithm, function, module or unit for a specific data set, or 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 here. Optionally, the specific data set includes the input and / or output of the AI unit or I model.

[0058] Optionally, the identifier of the AI ​​unit may be an AI model identifier, an AI structure identifier, an AI algorithm identifier, or an identifier of a specific dataset associated with the AI ​​unit or AI model, or an identifier of a specific scenario, environment, channel characteristics, or device related to the AI / ML, or an identifier of a function, feature, capability, or module related to the AI / ML. This application does not specifically limit this.

[0059] The technical solutions provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0060] Figure 2 shows a flowchart of a CSI transmission method 200 provided in an exemplary embodiment of this application. This method 200 can be executed by a terminal, but is not limited to that executed by a terminal; specifically, it can be executed by hardware and / or software installed in the terminal. In this embodiment, the method 200 may include at least the following steps.

[0061] S210, the terminal jointly maps multiple first CSIs to a second CSI.

[0062] S220, the terminal sends a CSI report to the network-side device, the CSI report including the second CSI.

[0063] The plurality of first CSIs correspond to or are associated with different measurement resources. Optionally, the measurement resources may be, but are not limited to, reference signals such as CSI Reference Signal (CSI-RS) and Positioning Reference Signal (PRS).

[0064] The joint mapping can be understood as joint encoding or joint compression, etc. That is, in this embodiment, multiple first CSIs corresponding to or associated with different measurement resources can be jointly compressed or encoded to obtain better CSI compression or encoding performance and reduce resource overhead during CSI transmission.

[0065] In an embodiment, the measurement resource can be associated with, but not limited to, at least one of a measurement beam, a measurement frequency point, a transmission mode, a sub-band, an antenna port, and a time slot. In this embodiment, the CSI obtained by measurement under different measurement beams, measurement frequency points, transmission modes, sub-bands, antenna ports, and time slots has certain correlation. Therefore, the correlation between the CSIs can be used for joint mapping of the CSIs in this embodiment, which can effectively improve the performance of the joint mapping of the CSIs and reduce the resource overhead during transmission of the CSIs. The "correlation" can be understood as that the multiple CSIs obtained by measurement under different measurement resources have the same or similar characteristics. For example, when the measurement resource is a measurement beam, the basis vectors corresponding to the CSIs obtained by measurement under adjacent measurement beams can have a large number of coincidences.

[0066] The transmission mode can include, but is not limited to, a single-TRP transmission mode and a multi-TRP transmission mode. The single-TRP transmission mode can also be understood as centralized MIMO, and the multi-TRP transmission mode can also be understood as distributed MIMO.

[0067] When the measurement resource is associated with a sub-band and an antenna port, the joint mapping provided in this embodiment can be understood as joint mapping in the space-frequency domain.

[0068] When the measurement resource is associated with a sub-band, an antenna port, and a time slot, the joint mapping provided in this embodiment can be understood as joint mapping in the space-time-frequency domain.

[0069] When the measurement resource is associated with a measurement beam, the joint mapping provided in this embodiment can be understood as joint mapping in the frequency domain, and the CSI reporting is joint mapping of the CSI under multiple beams.

[0070] In this embodiment, the more the domains of the joint mapping, the better the performance of the joint mapping, such as reducing more mapping overhead.

[0071] Optionally, the first CSI mentioned in the context of the present application can include, but is not limited to, all or part of a CSI reference signal resource indicator (CRI), a PMI, a rank indicator (RI), a channel quality indicator (CQI), a layer indicator (LI), and a precoding matrix.

[0072] In this embodiment, the terminal reports the joint mapping of the multiple first CSIs associated with or corresponding to different measurement resources, which can effectively reduce the resource overhead during CSI reporting.

[0073] In an embodiment, when the terminal jointly maps the plurality of first CSIs into the second CSI in S210, the joint mapping performance is related to the mapping order (or called arrangement order, input order, etc.) of the plurality of first CSIs. For example, taking the case of measuring resource associated with measuring beam as an example, although there is a certain correlation between the CSIs corresponding to each beam, the correlation between the CSIs under different orders of beams is also different, thereby causing the feature pattern between the jointly mapped CSIs to also change with the change of the beam order. For example, it is assumed that the CSIs measured at beam 0, beam 1, and beam 2 are arranged in the order of high and low of reference signal received power (RSRP), wherein the higher the RSRP, the lower the noise content in the CSI, and the higher the useful information. Then, if the CSIs arranged in the order from high to low of RSRP are jointly mapped, a possible feature pattern between the CSIs is that the useful information possessed by the first CSI is greater than the useful information possessed by the second CSI, and the useful information possessed by the second CSI is greater than the useful information possessed by the third CSI. But once the CSIs are arranged in the order from low to high of RSRP, the specific pattern between the jointly mapped CSIs becomes that the useful information possessed by the first CSI is less than the useful information possessed by the second CSI, and the useful information possessed by the second CSI is less than the useful information possessed by the third CSI, that is, the feature pattern between the CSIs caused by different joint mapping orders is different, thereby affecting the joint mapping performance.

[0074] Then in this case, when jointly mapping based on the predetermined mapping relationship, since the CSI mapping order supported by the predetermined mapping relationship is obtained by pre-configuration or training, once the mapping order of the CSI is different from the CSI mapping order supported by the predetermined mapping relationship, the joint mapping performance will be affected.

[0075] For example, when the predetermined mapping relationship is implemented based on an AI unit, the training data set used for training the AI unit does not necessarily include the CSIs corresponding to all beam combinations, so the trained AI unit may not be able to adapt to any order of CSI combination. Therefore, when jointly mapping, the mapping order of the CSI input to the AI unit needs to be aligned, thereby ensuring the inference performance of the AI unit, that is, the joint mapping performance of the AI unit. For example, in the AI unit training stage, it is possible to arrange each CSI in the order of high and low of the RSRP of each beam, and the higher the RSRP of the corresponding beam, the earlier the arrangement. At this time, if the trained AI unit is used for joint mapping without arranging the CSI in the order from high to low of the beam RSRP, the joint mapping performance of the AI unit will be affected.

[0076] Therefore, in the embodiment, the joint mapping of the multiple CSIs can be performed according to the CSI mapping order supported by the predetermined mapping relationship, so as to ensure the performance of the joint mapping based on the predetermined mapping relationship. Based on this, in an embodiment, the process of jointly mapping the multiple first CSIs into the second CSI by the terminal in S210 can include but is not limited to: determining, by the terminal, a mapping order of the multiple first CSIs, and then jointly mapping the multiple first CSIs into the second CSI according to the mapping order of the multiple first CSIs and based on the predetermined mapping relationship. Wherein, the mapping order of the multiple first CSIs is the same as the CSI mapping order supported by the predetermined mapping relationship, thereby effectively ensuring the CSI mapping performance by ensuring that the mapping order of the multiple first CSIs is the same as the CSI mapping order supported by the predetermined mapping relationship.

[0077] For example, if the CSI mapping order supported by the predetermined mapping relationship set or trained in the predetermined mapping relationship configuration stage is the CSI arranged in the order of beam0, beam2, beam1, i.e., CSI 0, CSI 2, CSI 1, then after measuring the three first CSIs corresponding to beam0, beam1, and beam2, the terminal can sort the three first CSIs in the order of beam0, beam2, beam1, and obtain the mapping order of the multiple first CSIs: CSI 0, CSI 2, CSI 1.

[0078] Corresponding to the joint mapping described above, the predetermined mapping relationship can be understood as a compressor capable of jointly compressing multiple first CSIs, or an encoder capable of jointly encoding CSI, etc. Based on this, the mapping order can also be understood as the input order of the compressor or the encoder, which is not limited here.

[0079] It should be noted that for the case where the predetermined mapping relationship is implemented based on the AI unit, although it can be considered to let the AI unit learn different CSI mapping orders in the training stage (such as through some data enhancement means), and then let the AI unit have the ability to handle multiple CSI mapping orders, to avoid the step of determining the CSI mapping order by the terminal before joint training, but limited by the learning ability of the AI unit, if the AI unit simultaneously learns too many CSI mapping orders, the performance of the AI unit joint mapping will be reduced. Therefore, in the embodiment, a compromise scheme of the expansibility of the CSI mapping order and the joint mapping performance effect is proposed, that is, the AI unit supports part of the CSI mapping order, and when the terminal performs joint mapping based on the AI unit, the mapping order of the multiple CSIs to be fed back is made the same as the CSI mapping order supported by the AI unit through the CSI mapping order determination, so as to ensure the joint mapping performance.

[0080] In an embodiment, the AI unit can include one or more of an AI unit used by the terminal, a reference AI unit of the AI unit used by the terminal, an AI unit used by the terminal in testing, and a reference AI unit of the AI unit used by the terminal in testing.

[0081] In some embodiments, the terminal can determine the mapping order of the plurality of first CSIs in various ways. For example, the mapping order can be determined according to a mapping order or rule indicated by a network-side device, or the mapping order can be determined by the terminal itself.

[0082] For example, for the case where the network-side device indicates, the network-side device can send target configuration information to the terminal for indicating the mapping order of at least part of the plurality of first CSIs. Correspondingly, the terminal receives the target configuration information from the network-side device, and determines the mapping order of the plurality of first CSIs according to the target configuration information.

[0083] In some embodiments, the target configuration information can include, but is not limited to, at least one of 11) to 15).

[0084] 11) first indication information for indicating the mapping order of at least part of the plurality of first CSIs.

[0085] That is, the network-side device can directly indicate the mapping order of at least part of the plurality of first CSIs to the terminal, so that the terminal performs joint mapping of the plurality of first CSIs based on the indicated mapping order of at least part of the plurality of first CSIs.

[0086] If the first indication information only indicates the mapping order of part of the plurality of first CSIs, the mapping order of the first CSI not indicated can be determined by the terminal, and the result of the determination can be reported to the network-side device by the terminal, so that the network-side device and the terminal are consistent in understanding the mapping order of the plurality of first CSIs.

[0087] For example, assuming that the measurement resource is a CSI-RS, the plurality of first CSIs are CSI 1, CSI 2, CSI 3, and CSI 4 corresponding to CSI-RS1, CSI-RS2, CSI-RS3, and CSI-RS4 respectively, and the network-side device indicates only the mapping order of CSI 1, CSI 2, and CSI 3, such as CSI 2, CSI 3, and CSI 1, through the first indication information, if the terminal autonomously determines the mapping order of CSI 4, such as CSI 2, CSI 3, CSI 4, and CSI 1, the terminal can report the mapping order of CSI 4, such as [CSI-RS2, CSI-RS3, CSI-RS4, CSI-RS1], to the network-side device after joint mapping based on the mapping order of “CSI 2, CSI 3, CSI 4, and CSI 1”, so that the network-side device and the terminal are consistent in understanding the mapping order of the first CSIs, and the network-side device determines which measurement resource, such as which CSI-RS, the CSI reported by the terminal corresponds to.

[0088] 12) Second indication information for indicating the order of at least part of the plurality of first CSIs after demapping.

[0089] Compared with the mapping order indicated in the first indication information when the CSIs are jointly mapped, the second indication information indirectly indicates the mapping order when the CSIs are jointly mapped by indicating the order of at least part of the plurality of first CSIs after demapping.

[0090] In an embodiment, the terminal determines that the mapping order of the plurality of first CSIs is the same as or consistent with the order of at least part of the plurality of first CSIs after demapping.

[0091] For example, assuming that the plurality of first CSIs are CSI 1, CSI 2, CSI 3, and CSI 4 corresponding to CSI-RS1, CSI-RS2, CSI-RS3, and CSI-RS4 respectively, the network-side device indicates the order of at least part of the plurality of first CSIs after demapping, such as CSI 1, CSI 2, CSI 4, and CSI 3, through the second indication information, and the terminal can determine that the CSI mapping order of the plurality of first CSIs is CSI 1, CSI 2, CSI 4, and CSI 3.

[0092] In addition, similar to the first indication information, if the second indication information indicates the order of the demapped part of the plurality of first CSIs, the CSI mapping order of the unindicated part can be determined by the terminal and reported to the network side device, so that the network side device and the terminal are consistent in understanding the mapping order of the first CSI, and then the network side device determines which measurement resource the terminal reports the CSI corresponds to, such as which CSI-RS.

[0093] 13) Third indication information for indicating at least one measurement resource group, the mapping order of the first CSI corresponding to or associated with the order of the measurement resources in the measurement resource group.

[0094] In this case, the terminal can select a target measurement resource group from at least one measurement resource group, and determine that the mapping order of the plurality of first CSIs is the same as the order of the measurement resources in the target measurement resource group.

[0095] For example, assuming that the measurement resource is CSI-RS, and the network side device indicates 3 measurement resource groups through the third indication information, such as reference signal combination 1 [CSI-RS1, CSI-RS2, CSI-RS 3], reference signal combination 2 [CSI-RS 3, CSI-RS 5, CSI-RS 7], reference signal combination 3 [CSI-RS1, CSI-RS 4, CSI-RS 6]. Then, the terminal can select reference signal combination 3 as the target measurement resource group from among them, and determine the mapping order of the CSI according to the order of each CSI-RS in reference signal combination 3 [CSI-RS1, CSI-RS 4, CSI-RS 6], that is, CSI 1 corresponding to CSI-RS1, CSI 4 corresponding to CSI-RS 4, and CSI 6 corresponding to CSI-RS 6.

[0096] For example, assume that the network-side device configures four reference signals CSI-RS1, CSI-RS2, CSI-RS3, and CSI-RS4 and indicates reference signal combination 1 [CSI-RS1, CSI-RS2, *], reference signal combination 2 [CSI-RS2, CSI-RS4, *], and reference signal combination 3 [CSI-RS3, CSI-RS1, *], where * represents no specific CSI-RS. The terminal will select reference signal combination 2 [CSI-RS2, CSI-RS4, *] as the target measurement resource group from the above reference signal combinations, and then select a * position from the remaining CSI-RSs. Finally, the terminal determines the mapping order of the CSI based on the order of the CSI-RSs in the filled target measurement resource group, for example, when the filled target measurement resource group is [CSI-RS2, CSI-RS4, CSI-RS1], the mapping order of the CSI is CSI 2 corresponding to CSI-RS2, CSI 4 corresponding to CSI-RS4, and CSI 1 corresponding to CSI-RS1.

[0097] In an embodiment, after the terminal completes the joint mapping of the CSI based on the aforementioned CSI mapping order, the terminal can report the CSI mapping order to the network-side device, so that the network-side device and the terminal are consistent in understanding the mapping order of the first CSI, and the network-side device determines which measurement resource, such as which CSI-RS, the CSI reported by the terminal corresponds to.

[0098] 14) Fourth indication information for indicating a target rule for describing the determination manner of the mapping order of at least part of the first CSI. That is, the terminal can indicate the target rule for determining the CSI mapping order to the terminal, so that the terminal determines the CSI mapping order according to the target rule.

[0099] In an embodiment, the target rule can be various, for example, the target rule can include at least one of the following rules 1-3.

[0100] Rule 1: The mapping order of the first CSI is determined according to the size of the RSRP corresponding to the measurement resource, for example, the higher the RSRP, the earlier the mapping order of the first CSI.

[0101] Exemplarily, assuming that the measurement resource is CSI-RS, and rule 1 stipulates that the first CSI is sorted in descending order of RSRP of the beam corresponding to the CSI-RS, i.e., the mapping order, if the order of RSRP of the beams corresponding to CSIRS1, CSI-RS2, and CSI-RS 3 is CSI-RS2>CSI-RS 3>CSI-RS1, and the terminal selects CSI-RS2 and CSI-RS 3 as the first CSI for joint mapping, then the mapping order is CSI 2 corresponding to CSI-RS2, and CSI 3 corresponding to CSI-RS 3.

[0102] Rule 2: The mapping order of the first CSI is in the order of configuration or indication of the measurement resource. For example, the earlier the configuration or indication of the measurement resource, the earlier the mapping order of the corresponding first CSI.

[0103] Exemplarily, assuming that the measurement resource is CSI-RS, and rule 2 stipulates that the first CSI is sorted in the order of configuration or indication of the CSI-RS, i.e., the mapping order, if the order of configuration or indication of the CSI-RS is CSI-RS1, CSI-RS2, and CSI-RS 3, and the terminal selects CSI-RS2 and CSI-RS 3 as the first CSI for joint mapping, then the mapping order is the same as that of CSI-RS2 and CSI-RS 3, i.e., CSI 2 corresponding to CSI-RS2 and CSI 3 corresponding to CSI-RS 3.

[0104] Rule 3: According to whether the first CSI is a mandatory reported CSI, determine the mapping order of the first CSI. For example, the mandatory reported first CSI is located before the optional reported first CSI.

[0105] Exemplarily, assuming that the measurement resource is CSI-RS, and rule 3 stipulates that the mandatory reported first CSI is located before the optional reported first CSI, i.e., the mapping order, if the CSI corresponding to CSI-RS1 and CSI-RS 3 is a mandatory reported CSI, and the CSI corresponding to CSI-RS2 is an optional reported CSI, and the terminal selects CSI-RS2 and CSI-RS 3 as the first CSI for joint mapping, then the mapping order is the same as that of CSI-RS2 and CSI-RS 3, i.e., CSI 3 corresponding to CSI-RS 3 and CSI 2 corresponding to CSI-RS2.

[0106] In an embodiment, the target rule can be indicated in various ways by the fourth indication information. For example, the fourth indication information can include, but is not limited to, at least one of a first identifier and first description information. The first identifier is used to identify the target rule. For example, assuming that multiple CSI mapping order determination rules, such as the aforementioned rule 1 to rule 3, are configured in the network side device and the terminal by means of a protocol agreement, the network side device can select one of them as the target rule and indicate it to the terminal.

[0107] The first description information is used to describe the content of the target rule, such as at least one of the aforementioned rule 1 to rule 3.

[0108] In an embodiment, after the terminal determines the mapping order of the first CSI based on the aforementioned target rule and completes the joint mapping of the CSI, the terminal can report the CSI mapping order to the network side device, so that the network side device and the terminal are consistent in understanding the mapping order of the first CSI, and then the network side device determines which measurement resource, such as which CSI-RS, each CSI reported by the terminal corresponds to.

[0109] 15) Fifth indication information, used to indicate the order of multiple measurement resources, and the mapping order of the first CSI corresponds to or is associated with the order of the measurement resources.

[0110] In an embodiment, if the target configuration information includes the fifth indication information, the terminal can determine that the mapping order of the multiple first CSIs is the same as the order of the multiple measurement resources.

[0111] For example, assuming that the network side device indicates the order of the measurement resources by the fifth indication information as: CSI-RS1, CSI-RS2, CSI-RS3, if the terminal selects the CSI corresponding to CSI-RS1 and the CSI corresponding to CSI-RS3 as the first CSI for joint mapping, then the mapping order of the first CSI is consistent with the order of CSI-RS1 and CSI-RS3, i.e., CSI1, CSI3.

[0112] In an embodiment, after the terminal determines the mapping order of the first CSI based on the aforementioned fifth indication information and completes the joint mapping of the CSI, the terminal can report the CSI mapping order to the network side device, so that the network side device and the terminal are consistent in understanding the mapping order of the first CSI, and then the network side device determines which measurement resource, such as which CSI-RS, each CSI reported by the terminal corresponds to.

[0113] For the aforementioned target configuration information, the network side device can employ one of the aforementioned indication information to indicate the mapping order of all the first CSIs, or employ two or more of the aforementioned indication information to jointly indicate the mapping order of all the first CSIs.

[0114] For example, for the latter, the network side device can indicate the mapping order of part of the first CSIs through the first indication information, and indicate the mapping order of another part of the first CSIs through the second indication information, etc., or indicate the mapping order of part of the first CSIs through the first indication information, and indicate the mapping order of another part of the first CSIs through the fourth indication information, etc., which is not limited herein.

[0115] In an embodiment, the network side device indicates or configures the mapping order of the first CSIs, and the terminal determines the mapping order of the first CSIs according to the indication or configuration of the network side device, so that the resource overhead problem caused by the terminal reporting the mapping of the first CSIs to the network side can be avoided, and the understanding of the mapping order of the CSI in the joint mapping by the network side device and the terminal is consistent.

[0116] In addition, in addition to the aforementioned indication or configuration of the mapping order of at least part of the first CSIs by the network side device, in the present embodiment, the network side device can also not indicate or configure the mapping order of the first CSIs, i.e., the terminal can autonomously determine the mapping order of the first CSIs. Then in this case, the terminal needs to indicate the mapping order of the first CSIs to the network side device when transmitting the CSI report, so that the network side device and the terminal have consistent understanding of the mapping order of the first CSIs, and the network side device determines which measurement resource, such as which CSI-RS, the CSI reported by the terminal corresponds to.

[0117] In an embodiment, in addition to sending the target configuration information to the terminal, the network side device can also send other configuration information for the joint mapping of the CSI to the terminal, such as configuring or indicating whether the terminal performs joint mapping of the CSI, the AI unit used by the terminal when performing joint mapping of the CSI, the uplink resource for reporting the joint mapping result of the CSI by the terminal, the number of CSIs when the terminal performs joint mapping of the CSI, etc., which is not limited herein.

[0118] In an embodiment, in the case that the terminal jointly maps the plurality of first CSIs into the second CSI based on the predetermined mapping relationship, the plurality of first CSIs also satisfy the CSI mapping requirement corresponding to the predetermined mapping relationship. In this way, the joint mapping performance can be further improved. The CSI mapping requirement can include, but is not limited to, that the reference signal received power (RSRP) corresponding to the CSI required to be jointly mapped by using the predetermined mapping relationship is higher than a first threshold value, the eigenvalue corresponding to the CSI is higher than a second threshold value, and the like, wherein the first threshold value and the second threshold value can be configured by a protocol agreement or the like.

[0119] The aforementioned "eigenvalue corresponding to the CSI" is a quantity associated with a channel matrix. For example, in the present application, when the CSI required to be jointly mapped is a precoding matrix, the precoding matrix is generally obtained by performing eigenvalue decomposition on the original measured channel. Eigenvalue decomposition will obtain left and right eigenvector matrices and eigenvalues, each eigenvector matrix contains a plurality of eigenvectors, and each eigenvector corresponds to an eigenvalue.

[0120] In an embodiment, the terminal can also report terminal capability information to the network side device to indicate whether the terminal has the capability of jointly mapping a plurality of CSIs. Correspondingly, the network side device, after receiving the terminal capability information, sends relevant configuration information for the terminal when jointly mapping CSIs, such as the target configuration information, according to the terminal capability information. For example, in the case that the terminal has the capability of jointly mapping a plurality of CSIs, the target configuration information is sent to the terminal, and otherwise, the target configuration information is not sent. In this way, the target configuration information sent by the network side to the terminal can be matched with the terminal capability.

[0121] In an embodiment, for the network side device, after the terminal sends the CSI report to the network side device, if the network side device receives the CSI report from the terminal, the network side device can demap the second CSI in the CSI report into a plurality of first CSIs, thereby completing the transmission of the first CSIs.

[0122] Optionally, the network side device can demap the second CSI into a plurality of first CSIs based on a predetermined demapping relationship. Corresponding to the aforementioned predetermined mapping relationship, the predetermined demapping relationship can be understood as a decompressor or a decoder, and it can be implemented based on an AI unit, which is not limited here.

[0123] For example, in the embodiment, when the predetermined demapping relationship is based on an AI unit, the AI unit can include one or more of an AI unit used by the network-side device, a reference AI unit of the AI unit used by the network-side device, an AI unit used by the network-side device in testing, and a reference AI unit of the AI unit used by the network-side device in testing.

[0124] In an embodiment, the terminal can indicate the mapping order of at least part of the plurality of first CSIs in the CSI report, i.e., the sixth indication information can be carried in the CSI report to indicate the mapping order of at least part of the plurality of first CSIs. Correspondingly, after demapping the plurality of first CSIs, the network-side device can determine whether the order of the plurality of first CSIs obtained by demapping is the same as the mapping order indicated by the sixth indication information. If they are the same, it is determined that the CSI transmission is correct, and subsequent data scheduling is performed based on the plurality of first CSIs obtained by demapping.

[0125] In an embodiment, the sixth indication information can be newly introduced in the present application and be specifically used to indicate the mapping order of at least part of the plurality of first CSIs, or the existing indication information can be reused.

[0126] In an embodiment, for the case of reusing the existing indication information, considering that the terminal can indicate the order of a group of CSIs when reporting the multi-beam CSI, the order is used to indicate the order of the channel quality indicator (CQI) in the CSI reporting part 2. Therefore, in the embodiment, the order can be reused to indicate the mapping order of at least part of the plurality of first CSIs, i.e., a group of CSI orders are reported to associate CQI and CSI mapping order, that is, the sixth indication information can also be used to indicate the order of other objects in addition to the mapping order of at least part of the plurality of first CSIs, and the other objects include CQI.

[0127] Alternatively, for the case of reusing the existing indication information, assuming that the sixth indication information can reuse the indication of the associated quantity of the measurement resource associated with or corresponding to the CSI, when the measurement resource is a CSI-RS, the sixth indication information can reuse the associated quantity CRI of the CSI-RS, i.e., the order of the CSI-RS indicated by the CRI can be used to indicate the mapping order of the plurality of first CSIs.

[0128] Exemplarily, assuming that the mapping order of the plurality of first CSIs is [CSI 1, CSI 4, CSI 2, CSI 3], then the sixth indication information can be [CSI-RS1, CSI-RS 4, CSI-RS2, CSI-RS 3]. Correspondingly, after receiving the sixth indication information, the network-side device can determine that the mapping order of the plurality of first CSIs is 1, 4, 2, 3, and sequentially corresponds to CSI-RS1, CSI-RS 4, CSI-RS2, CSI-RS 3 respectively.

[0129] It is worth noting that for the case that the sixth indication information indicates the mapping order of at least part of the plurality of first CSIs, it can be understood that if the network-side device only configures the mapping order of part of the plurality of first CSIs, the sixth indication information can indicate the mapping order of all first CSIs, or only indicate the order of part of the CSIs determined by the terminal.

[0130] For example, assuming that the network-side device indicates the reference signal combination [CSI-RS1, CSI-RS2, *], and the mapping order of the first CSIs determined by the terminal according to the reference signal combination [CSI-RS1, CSI-RS2, *] is [CSI 1, CSI 2, CSI 4], wherein the order of CSI 1 and CSI 2 is determined according to CSI-RS1 and CSI-RS2, and CSI 4 is determined by the terminal, then in this case, the terminal can indicate the mapping order of the plurality of first CSIs through the sixth indication information, that is, the terminal reports the complete mapping order: [CSI-RS1, CSI-RS2, CSI-RS 4]; or, the terminal can only report the mapping order of CSI4 through the sixth indication information, that is, the terminal only reports the mapping order of the CSI not configured by the network-side device: [CSI-RS 4].

[0131] Based on the foregoing description of the CSI transmission scheme, in order to better understand the implementation process, the implementation process will be exemplarily introduced in combination with examples as follows.

[0132] Example 1

[0133] Assuming that the mapping order of the terminal performing joint mapping of multiple CSIs is completely configured by the network-side device, then as shown in FIG. 3a, the transmission process of the CSI is as follows.

[0134] S311, data collection.

[0135] Among them, the network-side device can configure the terminal to measure the CSI on a plurality of 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 predetermined mapping relationship.

[0136] Optionally, if the predetermined mapping relationship is implemented based on the AI ​​unit, the data reported in S310 can be used for training the AI ​​unit.

[0137] Optionally, the terminal may report the collected data via air interface or Radio Resource Control (RRC) signaling.

[0138] S312, Terminal capability information reporting.

[0139] The terminal can send terminal capability information to the network-side device during the capability reporting phase to indicate to the network-side device whether the terminal has the capability of CSI joint mapping.

[0140] Optionally, if the terminal has the capability of CSI joint mapping, and the predetermined mapping relationship used by the terminal when performing CSI joint mapping is implemented based on AI units, then the terminal capability information can also be used to indicate the AI ​​units supported by the terminal, whether the terminal supports specific model structures, and other capabilities. The specific model structure may include, but is not limited to, one or more of fully connected models, convolutional network models, etc.

[0141] S313, Determination of the predetermined mapping relationship and the predetermined demapping relationship.

[0142] When the predetermined mapping relationship and the predetermined demapping relationship corresponding to the predetermined mapping relationship are implemented based on AI units, the network-side device can train the AI ​​unit based on the collected CSIs after collecting multiple CSIs. For example, it can train a complete AI unit (such as an encoder) for multi-CSI joint mapping and an AI unit (such as a decoder) for multi-CSI joint demapping.

[0143] Optionally, the training methods for the aforementioned AI units may 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 elaborated here.

[0144] In the case of joint training on a single node, the network-side device can send the AI ​​unit corresponding to the predetermined mapping relationship and related information (such as the identifier of the AI ​​unit) to the terminal after the training is completed.

[0145] For joint training on multiple nodes, the complete model can be jointly trained on network-side devices and terminals by exchanging forward / backward propagation information and AI unit identification information. For example, the network side is responsible for updating the AI ​​units (such as decoders) used for multi-CSI joint demapping, and the terminal side is responsible for updating the AI ​​units (such as encoders) used for multi-CSI joint mapping.

[0146] For separate (or step-by-step) training on multiple nodes, the network-side device first trains a complete model, such as a decoder, and then allows the terminal-side to train an encoder part capable of pairing with the decoder through interaction of a data set and identification information (such as a data set ID) of an AI unit.

[0147] Optionally, in the training phase, the network-side device and the terminal-side device can prepare multiple available models, each of which corresponds to a different use range. For example, model 1 can jointly map 2 CSIs, model 2 can jointly map 4 CSIs, and so on.

[0148] In S314, the network-side device sends relevant configuration information when the terminal performs CSI joint mapping.

[0149] The relevant configuration information when the terminal performs CSI joint mapping includes, but is not limited to, at least one of the following 21) to 24).

[0150] 21) Target configuration information for indicating a mapping order in the multiple first CSIs.

[0151] Optionally, the target configuration information includes at least one of first indication information, second indication information, third indication information, fourth indication information, and fifth indication information.

[0152] It can be understood that the relevant description of the target configuration information can refer to the relevant description in the foregoing method embodiment 200, which will not be described here.

[0153] 22) Seventh indication information for indicating that the terminal jointly reports CSI.

[0154] Optionally, the indication manner of the seventh indication information includes implicitly indicating that the terminal jointly reports CSI by indicating a measurement resource associated with or corresponding to the CSI, such as a CSI-RS.

[0155] 23) Target identification for identifying an AI unit (also referred to as an AI model) used when performing joint mapping, that is, a predetermined mapping relationship when performing joint mapping is implemented based on the AI unit.

[0156] The target identification includes at least one of a model identification (model ID), a data set identification (dataset ID), and a model pair identification (pairing ID), wherein the data set identification is used for a target data set used for training of the AI unit, and the model pair identification is used for identifying a target model pair including the AI unit used when the terminal performs joint mapping and an AI unit used when the network-side device performs demapping.

[0157] 24) Target uplink resource used for CSI joint reporting, used for the terminal to report the joint mapped CSI based on the uplink resource.

[0158] S315, the terminal obtains a plurality of first CSIs to be fed back through reference signal measurement.

[0159] S316, the terminal determines the mapping order of the plurality of first CSIs according to the target configuration information in S314, and jointly maps the plurality of first CSIs into a second CSI according to the mapping order of the plurality of first CSIs based on a predetermined mapping relationship.

[0160] S317, the terminal sends a CSI report to the network side device based on the target uplink resource configured in S314, and the CSI report includes the second CSI.

[0161] Optionally, if the network side device indicates a plurality of CSI mapping order determination methods for the terminal to select through the target configuration information in S314, or the network side device indicates a target rule for the terminal to determine the mapping order of the first CSI through the fourth indication information in the target configuration information, the CSI report can further include sixth indication information for indicating the mapping order of the plurality of first CSIs during joint mapping, that is, the terminal needs to report the mapping order of the first CSI determined by the terminal at the same time of reporting the second CSI after joint mapping, so that the network side device and the terminal are consistent in understanding the mapping order of the first CSI, and then the network side device determines which measurement resource, such as which CSI-RS, the CSI reported by the terminal corresponds to.

[0162] Exemplarily, assuming that the network side device indicates the order of the measurement resources, such as CSI-RS1, CSI-RS2, and CSI-RS3, through the fifth indication information in the target configuration information in S314, and the terminal selects two reference signals, CSI-RS1 and CSI-RS3, that is, the mapping order of the CSI joint mapping performed by the terminal is the same as the order of CSI-RS1 and CSI-RS3. Then, the terminal needs to report the sixth indication information to indicate the mapping order of CSI1 and CSI3, such as the order information of [CSI1, CSI3], at the same time of reporting the joint mapping result (i.e. the second CSI) of CSI1 and CSI3, so that the network side device knows the specific content of the recovered CSI, such as which CSI-RS the recovered CSI corresponds to. For example, if the sixth indication information is the order information of [CSI1, CSI3], and the network side device demaps to obtain CSI1 and CSI3, then the network side device determines that CSI1 corresponds to CSI-RS1 and CSI3 corresponds to CSI-RS3.

[0163] Generally, the sixth indication information can be carried in the CSI reporting part 1.

[0164] Optionally, the sixth indication information can be newly introduced in this application and is dedicated to indicating the mapping order of the plurality of first CSIs, or can be multiplexed with the existing indication information, i.e., the mapping order of the plurality of first CSIs can be indicated together with other information. For example, the sixth indication information can also be used to indicate the order of other objects in addition to the mapping order of at least part of the plurality of first CSIs, and the other objects include CQI.

[0165] S318, after the network side device receives the CSI report, the encoder output, i.e., the second CSI, is separated from the CSI report, and the second CSI is demapped to obtain the plurality of first CSIs.

[0166] Optionally, the network side device can determine which measurement resource each of the plurality of first CSIs obtained by demapping corresponds to according to the target configuration information in S314 and / or the sixth indication information carried in the CSI report, for subsequent data scheduling, etc.

[0167] It can be understood that more or fewer steps than the foregoing can be included in the present example 1, which is not limited herein. In addition, the implementation process of each step in the present example 1 can also refer to the related description in the foregoing method embodiment 200, which will not be repeated here.

[0168] Example 2

[0169] Compared with example 1, in the present example 2, it is assumed that the network side device configures the mapping order of part of the plurality of first CSIs in joint mapping, and the terminal determines the mapping order of the remaining CSIs (an extreme case is that the network only configures the number of jointly mapped CSIs, and the input order is completely determined by the UE) and then reports. For example, as shown in FIG. 3b, the implementation process can include but is not limited to the following steps.

[0170] S321-S323 are the same as example 1, which will not be repeated here.

[0171] S324, the network side device sends related configuration information to the terminal when performing CSI joint mapping.

[0172] The related configuration information when performing CSI joint mapping includes but is not limited to at least one of the following.

[0173] 31) Target configuration information, used to indicate the mapping order of part of the plurality of first CSIs.

[0174] Optionally, the target configuration information includes at least one of first indication information, second indication information, third indication information, fourth indication information, and fifth indication information.

[0175] It can be understood that the related description about the target configuration information can refer to the related description in the foregoing method embodiment 200, which will not be described here again.

[0176] 32) Seventh indication information for indicating that the terminal jointly reports the CSI.

[0177] Optionally, the indication manner of the seventh indication information includes implicitly indicating that the terminal jointly reports the CSI by indicating a measurement resource associated with or corresponding to the CSI, such as a CSI-RS.

[0178] 33) Target identification for identifying an AI unit (also referred to as an AI model) used when performing joint mapping, that is, a predetermined mapping relationship when performing joint mapping is implemented based on the AI unit.

[0179] The target identification includes at least one of a model identification (model ID), a dataset identification (dataset ID), and a model pair identification (pairing ID), wherein the dataset identification is used for a target dataset, and the target dataset is used for training of the AI unit. The model pair identification is used for identifying a target model pair, which includes the AI unit used when performing joint mapping of the terminal and the AI unit used when performing demapping by the network side device. 34) Target uplink resource used for CSI joint reporting, which is used for the terminal to report the CSI after joint mapping based on the uplink resource.

[0180] S325, the terminal acquires a plurality of first CSIs to be fed back through reference signal measurement.

[0181] S326, the terminal determines a mapping order of the plurality of first CSIs according to the target configuration information in S324, and jointly maps the plurality of first CSIs into a second CSI in the mapping order of the plurality of first CSIs based on a predetermined mapping relationship.

[0182] S327, the terminal sends a CSI report to the network side device based on the target uplink resource configured in S324, wherein the CSI report includes the second CSI and sixth indication information.

[0183] Since the network side device only indicates the mapping order of part of the first CSIs in S324, the terminal needs to carry the mapping order of the remaining first CSIs, that is, the sixth indication information, when reporting the CSI.

[0184] For example, assume that the network-side device indicates the reference signal combination [CSI-RS1, CSI-RS2, *], and the terminal determines the mapping order of the first CSI according to the reference signal combination [CSI-RS1, CSI-RS2, *] to be [CSI 1, CSI 2, CSI 4], wherein the order of CSI 1 and CSI 2 is determined according to CSI-RS1 and CSI-RS2, and CSI 4 is determined autonomously by the terminal. Therefore, the terminal needs to indicate the mapping order of CSI 4 in the CSI reporting part 1, i.e., the sixth indication information.

[0185] Optionally, the sixth indication information can be the mapping order of the plurality of first CSIs, i.e., the terminal still reports the complete mapping order, i.e., [CSI-RS1, CSI-RS2, CSI-RS 4].

[0186] Alternatively, the sixth indication information can also be the mapping order of CSI 4, i.e., the terminal only reports the mapping order of the CSI not configured by the network-side device, i.e., [CSI-RS 4].

[0187] Optionally, the sixth indication information can be newly introduced in the present application and be specifically used to indicate the mapping order of the plurality of first CSIs, or can reuse the existing indication information, i.e., the mapping order of the plurality of first CSIs can be indicated together with or jointly with other information. For example, the sixth indication information can also be used to indicate the order of other objects in addition to the mapping order of at least part of the plurality of first CSIs, wherein the other objects include CQI.

[0188] S328, after receiving the CSI report, the network-side device separates the encoder output, i.e., the second CSI, from the CSI report, and demaps the second CSI to obtain the plurality of first CSIs.

[0189] Optionally, the network-side device can determine, according to the target configuration information in S324 and / or the sixth indication information carried in the CSI report, to which measurement resource each of the plurality of first CSIs obtained by demapping corresponds, for subsequent data scheduling, etc.

[0190] It can be understood that the present example 2 can include more or fewer steps than the foregoing, which is not limited herein. In addition, the implementation process of each step in the present example 2 can also refer to the related description in the foregoing method embodiment 200, which will not be repeated here.

[0191] 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.

[0192] S410, the network side device receives a CSI report from a terminal, wherein the CSI report includes second CSI.

[0193] S420, the network side device demaps the second CSI into a plurality of first CSI.

[0194] The plurality of first CSI correspond to or are associated with different measurement resources, respectively.

[0195] In an embodiment, when the CSI report further includes sixth indication information, and the sixth indication information is used to indicate the mapping order of at least part of the plurality of first CSI, the network side device demaps the plurality of first CSI in the same order as the mapping order indicated by the sixth indication information.

[0196] In an embodiment, the sixth indication information is further used to indicate the order of other objects in addition to the mapping order of at least part of the plurality of first CSI, and the other objects include channel quality indication (CQI).

[0197] In an embodiment, the method further includes: the network side device sends target configuration information to the terminal; wherein the target configuration information is used to indicate the mapping order of at least part of the plurality of first CSI to the terminal.

[0198] In an embodiment, the target configuration information includes at least one of the following: first indication information, used to indicate the mapping order of at least part of the plurality of first CSI; second indication information, used to indicate the order of at least part of the plurality of first CSI after demapping; third indication information, used to indicate at least one measurement resource group, the mapping order of the first CSI corresponding to or being associated with the order of measurement resources in the measurement resource group; fourth indication information, used to indicate a target rule, the target rule being used to describe the determination manner of the mapping order of at least part of the plurality of first CSI; and fifth indication information, used to indicate the order of a plurality of measurement resources, the mapping order of the first CSI corresponding to or being associated with the order of the measurement resources.

[0199] In an embodiment, the fourth indication information includes at least one of the following: a first identifier, used to identify the target rule; and first description information, used to describe the content in the target rule.

[0200] In an embodiment, the measurement resource is associated with at least one of a measurement beam, a measurement frequency point, or a transmission mode.

[0201] In an embodiment, the method further includes: receiving, by the network-side device, terminal capability information from the terminal; wherein the terminal capability information is used to indicate whether the terminal has the capability of multiple CSI joint mapping.

[0202] The embodiments mentioned in the method embodiment 400 have the same or corresponding technical features as the foregoing method embodiment 200, and thus 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 implementation of the embodiments in the method embodiment 400 will not be described here again.

[0203] The execution subject of the CSI transmission method provided in the embodiments of the present application can be 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.

[0204] The embodiments of the present application provide a CSI transmission device. As an example, the CSI transmission device can be a communication device or a component in a communication device, such as a chip. 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.

[0205] The CSI transmission apparatus includes 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, 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, a gate circuit, a transistor, a discrete hardware component, or the like. The receiving module and the sending module can be implemented by a communication interface, which can include a transceiver, a pin, a circuit, a bus, a radio frequency unit, or the like.

[0206] Specifically, referring to FIG. 5, when the CSI transmission apparatus 500 is a terminal or a component in the terminal, the CSI transmission apparatus 500 includes a processing module 510 configured to jointly map a plurality of first CSIs into a second CSI, and a transmission module 520 configured to send a CSI report to a network side device, wherein the CSI report includes the second CSI, and the plurality of first CSIs correspond to or are associated with different measurement resources.

[0207] In an embodiment, the joint mapping of the plurality of first CSIs into the second CSI includes determining a mapping order of the plurality of first CSIs, and jointly mapping the plurality of first CSIs into the second CSI according to the mapping order of the plurality of first CSIs and based on a predetermined mapping relationship, wherein the mapping order of the plurality of first CSIs is the same as a CSI mapping order supported by the predetermined mapping relationship.

[0208] In an embodiment, the determination of the mapping order of the plurality of first CSIs includes receiving target configuration information from the network side device, the target configuration information being used to indicate a mapping order of at least part of the plurality of first CSIs, and determining the mapping order of the plurality of first CSIs according to the target configuration information.

[0209] In an embodiment, the target configuration information comprises at least one of: first indication information indicating a mapping order of at least part of the plurality of first CSIs; second indication information indicating an unmapped order of at least part of the plurality of first CSIs; third indication information indicating an order of measurement resources in at least one measurement resource group; fourth indication information indicating a target rule describing a determination manner of the mapping order of at least part of the plurality of first CSIs; and fifth indication information indicating an order of a plurality of measurement resources, the mapping order of the first CSIs corresponding to or being associated with the order of the measurement resources.

[0210] In an embodiment, the fourth indication information comprises at least one of: first identification identifying the target rule; and first description information describing content in the target rule.

[0211] In an embodiment, the determining the mapping order of the plurality of first CSIs according to the target configuration information comprises at least one of: in a case that the target configuration information comprises the second indication information, the terminal determining that the mapping order of the plurality of first CSIs is the same as the unmapped order of at least part of the plurality of first CSIs; in a case that the target configuration information comprises the third indication information, the terminal selecting a target measurement resource group from the at least one measurement resource group and determining that the mapping order of the plurality of first CSIs is the same as an order of measurement resources in the target measurement resource group; and in a case that the target configuration information comprises the fifth indication information, the terminal determining that the mapping order of the plurality of first CSIs is the same as the order of the plurality of measurement resources.

[0212] In an embodiment, the measurement resource is associated with at least one of a measurement beam, a measurement frequency point, and a transmission mode.

[0213] In an embodiment, the predetermined mapping relationship is implemented by an AI model, and the AI unit comprises at least one of: an AI unit used by the terminal; a reference AI unit of the AI unit used by the terminal; an AI unit used by the terminal in testing; and a reference AI unit of the AI unit used by the terminal in testing.

[0214] In an embodiment, the CSI report further comprises sixth indication information, and the sixth indication information is used to indicate the mapping order of at least part of the plurality of first CSIs.

[0215] In an embodiment, the sixth indication information is further used to indicate an order of another object other than the mapping order of at least part of the plurality of first CSIs, and the another object comprises a channel quality indicator (CQI).

[0216] In an embodiment, the transmission module 520 is further configured to report terminal capability information to the network-side device, wherein the terminal capability information is used to indicate whether the terminal has the capability of joint mapping of multiple CSIs.

[0217] 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.

[0218] Referring to FIG. 6, when the CSI transmission apparatus 600 is a network-side device or a component in a 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 second CSI; and a processing module 620 configured to demap the second CSI into multiple first CSIs, wherein the multiple first CSIs correspond to or are associated with different measurement resources respectively.

[0219] In an embodiment, in the case that the CSI report further comprises sixth indication information and the sixth indication information is used to indicate the mapping order of at least part of the multiple first CSIs, the network-side device demaps the multiple first CSIs in the same order as the mapping order indicated by the sixth indication information.

[0220] In an embodiment, the sixth indication information is further used to indicate the order of other objects in addition to the mapping order of at least part of the multiple first CSIs, and the other objects comprise channel quality indication (CQI).

[0221] In an embodiment, the method further comprises: the network-side device sends target configuration information to the terminal, wherein the target configuration information is used to indicate the mapping order of at least part of the multiple first CSIs to the terminal.

[0222] In an embodiment, the target configuration information comprises at least one of the following: first indication information used to indicate the mapping order of at least part of the multiple first CSIs; second indication information used to indicate the order of at least part of the multiple first CSIs after demapping; third indication information used to indicate at least one measurement resource group, wherein the mapping order of the first CSI corresponds to or is associated with the order of measurement resources in the measurement resource group; fourth indication information used to indicate a target rule, wherein the target rule is used to describe the determination manner of the mapping order of at least part of the multiple first CSIs; and fifth indication information used to indicate the order of multiple measurement resources, wherein the mapping order of the first CSI corresponds to or is associated with the order of the measurement resources.

[0223] In an embodiment, the fourth indication information comprises at least one of the following: a first identifier used to identify the target rule; and first description information used to describe content in the target rule.

[0224] In an embodiment, the measurement resource is associated with at least one of a measurement beam, a measurement frequency point, and a transmission mode.

[0225] In an embodiment, the method further comprises: receiving, by the network-side device, terminal capability information from the terminal; wherein the terminal capability information is used to indicate whether the terminal has the capability of multiple CSI joint mapping.

[0226] 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.

[0227] 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.

[0228] 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 according to an embodiment of the present application.

[0229] The terminal 800 includes, but is not limited to, at least part of the following components: 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, etc.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.), etc. 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 read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synch link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (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.

[0234] 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.

[0235] The processor 810 is configured to jointly map a plurality of first CSIs into a second CSI, and the radio frequency unit 801 is configured to send a CSI report to a network side device, wherein the CSI report includes the second CSI, and the plurality of first CSIs correspond to or are associated with different measurement resources respectively.

[0236] In an embodiment, the joint mapping of the plurality of first CSIs into the second CSI comprises: determining a mapping order of the plurality of first CSIs; and jointly mapping the plurality of first CSIs into the second CSI according to the mapping order of the plurality of first CSIs and based on a predetermined mapping relationship, wherein the mapping order of the plurality of first CSIs is the same as a mapping order of CSI supported by the predetermined mapping relationship.

[0237] In an embodiment, the determining of the mapping order of the plurality of first CSIs comprises: receiving target configuration information from the network-side device, the target configuration information being used to indicate a mapping order of at least part of the plurality of first CSIs; and determining the mapping order of the plurality of first CSIs according to the target configuration information.

[0238] In an embodiment, the target configuration information comprises at least one of: first indication information used to indicate a mapping order of at least part of the plurality of first CSIs; second indication information used to indicate an order of at least part of the plurality of first CSIs after demapping; third indication information used to indicate at least one measurement resource group, the mapping order of the first CSIs corresponding to or being associated with an order of measurement resources in the measurement resource group; fourth indication information used to indicate a target rule, the target rule being used to describe a determination manner of the mapping order of at least part of the plurality of first CSIs; and fifth indication information used to indicate an order of a plurality of measurement resources, the mapping order of the first CSIs corresponding to or being associated with the order of the measurement resources.

[0239] In an embodiment, the fourth indication information comprises at least one of: a first identifier used to identify the target rule; and first description information used to describe content in the target rule.

[0240] In an embodiment, the determining of the mapping order of the plurality of first CSIs according to the target configuration information comprises at least one of: in a case where the target configuration information comprises the second indication information, determining, by the terminal, the mapping order of the plurality of first CSIs to be the same as an order of at least part of the plurality of first CSIs after demapping; in a case where the target configuration information comprises the third indication information, selecting, by the terminal, a target measurement resource group from at least one measurement resource group and determining the mapping order of the plurality of first CSIs to be the same as an order of measurement resources in the target measurement resource group; and in a case where the target configuration information comprises the fifth indication information, determining, by the terminal, the mapping order of the plurality of first CSIs to be the same as the order of the plurality of measurement resources.

[0241] In an embodiment, the measurement resource is associated with at least one of a measurement beam, a measurement frequency point, and a transmission mode.

[0242] In an embodiment, the predetermined mapping relationship is implemented by an AI model; wherein the AI unit comprises at least one of the following: an AI unit used by the terminal; a reference AI unit of the AI unit used by the terminal; an AI unit used by the terminal in testing; a reference AI unit of the AI unit used by the terminal in testing.

[0243] In an embodiment, the CSI report further comprises sixth indication information; wherein the sixth indication information is used to indicate the mapping order of at least part of the plurality of first CSIs.

[0244] In an embodiment, the sixth indication information is further used to indicate the order of other objects in addition to the mapping order of at least part of the plurality of first CSIs, and the other objects comprise channel quality indication CQI.

[0245] In an embodiment, the radio frequency unit 801 is further configured to: report terminal capability information to the network side device; wherein the terminal capability information is used to indicate whether the terminal has the capability of joint mapping of a plurality of CSIs.

[0246] It can be understood that the implementation process of each implementation mode mentioned in the embodiment can refer to the related description of method embodiment 200 and achieve the same or corresponding technical effect. To avoid repetition, it will not be described here.

[0247] The embodiment of the application also provides a network side device comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the steps of the method embodiment shown in FIG. 4. The network side device embodiment corresponds to the network side device method embodiment described above, and each implementation process and implementation mode of the method embodiment described above can be applied to the network side device embodiment and achieve the same technical effect.

[0248] 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 to 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, which processes the received information and sends it out through the antenna 901.

[0249] 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.

[0250] The baseband device 903 can include at least one baseband board on which a plurality of chips are disposed, as shown in FIG. 9, one of the chips being, for example, a baseband processor, connected with the memory 905 through a bus interface to invoke programs in the memory 905 to perform the network device operations shown in the above method embodiments.

[0251] The network side device 900 can further include a network interface 906, which is, for example, a Common Public Radio Interface (CPRI).

[0252] Specifically, the network side device 900 of the embodiments of the present application further includes instructions or programs stored in the memory 905 and executable on the processor 904, the processor 904 invoking the instructions or programs in the memory 905 to perform the methods performed by the modules shown in FIG. 6 and achieve the same technical effects, and thus details are not repeated here.

[0253] The embodiments of the present application further provide a readable storage medium having programs or instructions stored thereon, the programs or instructions being executed by a processor to implement each process of the above CSI transmission method embodiments and achieve the same technical effects, and thus details are not repeated here.

[0254] 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.

[0255] The embodiments of the present application further provide a chip including a processor and a communication interface, the communication interface being coupled with the processor, the processor being configured to run programs or instructions to implement each process of the above CSI transmission method embodiments and achieve the same technical effects, and thus details are not repeated here.

[0256] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system on chip, a chip system or a system on chip, etc.

[0257] The embodiments of the present application further provide a computer program / program product stored in a storage medium, the computer program / program product being executed by at least one processor to implement each process of the above CSI transmission method embodiments and achieve the same technical effects, and thus details are not repeated here.

[0258] The embodiments of the present application further provide a wireless communication system, comprising a terminal and a network side device, the terminal can be used to implement each process of the CSI transmission method embodiment 200, the network side device can be used to implement each process of the CSI transmission method embodiment 400, and the same technical effects can be achieved, and details are not described herein to avoid repetition.

[0259] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, so that processes, methods, articles, or devices that comprise a list of elements not only include those elements, but also include other elements that are not expressly listed, or other elements inherent in such processes, methods, articles, or devices. Without more limitations, the element defined by the sentence "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to the order of performing the functions shown or discussed, and can also include performing the functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0260] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of computer software product and general hardware platform, of course, it can also be realized 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 the terminal or network side device execute the method described in each embodiment of the present application.

[0261] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not restrictive, and those skilled 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 scope protected by 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: mapping, by a terminal, a plurality of first CSIs to a second CSI jointly; sending, by the terminal, a CSI report to a network side device; wherein the CSI report comprises the second CSI, and the plurality of first CSIs correspond to or are associated with different measurement resources respectively.

2. The method of claim 1, wherein, mapping, by the terminal, a plurality of first CSIs to a second CSI jointly, comprising: determining, by the terminal, a mapping order of the plurality of first CSIs; mapping, by the terminal, the plurality of first CSIs to the second CSI jointly based on a predetermined mapping relationship according to the mapping order of the plurality of first CSIs; wherein the mapping order of the plurality of first CSIs is the same as a mapping order supported by the predetermined mapping relationship.

3. The method of claim 2, wherein, determining, by the terminal, a mapping order of the plurality of first CSIs, comprising: receiving, by the terminal, target configuration information from the network side device, the target configuration information being used to indicate a mapping order of at least part of the plurality of first CSIs; determining, by the terminal, the mapping order of the plurality of first CSIs according to the target configuration information.

4. The method of claim 3, wherein, the target configuration information comprises at least one of: first indication information used to indicate a mapping order of at least part of the plurality of first CSIs; second indication information used to indicate an order of at least part of the plurality of first CSIs after demapping; third indication information used to indicate at least one measurement resource group, the mapping order of the first CSIs corresponding to or being associated with an order of measurement resources in the measurement resource group; fourth indication information used to indicate a target rule, the target rule being used to describe a determination manner of the mapping order of at least part of the plurality of first CSIs; fifth indication information used to indicate an order of a plurality of measurement resources, the mapping order of the first CSIs corresponding to or being associated with the order of the measurement resources.

5. The method of claim 4, wherein, the fourth indication information comprises at least one of: a first identifier used to identify the target rule; first description information used to describe content in the target rule.

6. The method of claim 4, wherein, determining, by the terminal, the mapping order of the plurality of first CSIs according to the target configuration information, comprising at least one of: in a case where the target configuration information comprises the second indication information, determining, by the terminal, that the mapping order of the plurality of first CSIs is the same as an order of at least part of the plurality of first CSIs after demapping; in a case where the target configuration information comprises the third indication information, selecting, by the terminal, a target measurement resource group from at least one measurement resource group, and determining that the mapping order of the plurality of first CSIs is the same as an order of measurement resources in the target measurement resource group; in a case where the target configuration information comprises the fifth indication information, determining, by the terminal, that the mapping order of the plurality of first CSIs is the same as the order of the plurality of measurement resources.

7. The method of any one of claims 1-6, wherein, the measurement resources are associated with at least one of a measurement beam, a measurement frequency point, and a transmission mode.

8. The method of any one of claims 2-7, wherein, the predetermined mapping relationship is implemented by an artificial intelligence (AI) unit; wherein the AI unit comprises at least one of: an AI unit used by the terminal; and an AI unit used by the network side device. a reference AI unit of the AI unit used by the terminal; an AI unit used by the terminal in the test; a reference AI unit of the AI unit used by the terminal in the test.

9. The method of any one of claims 2-8, wherein, the CSI report further includes sixth indication information; wherein the sixth indication information is used to indicate a mapping order of at least part of the plurality of first CSIs.

10. The method of claim 9, wherein, The sixth indication information is also used to indicate an order of other objects in addition to the mapping order of at least part of the plurality of first CSIs, and the other objects include channel quality indicators (CQIs).

11. The method of any one of claims 1-10, wherein, The method further includes: The terminal reports terminal capability information to the network side device; wherein the terminal capability information is used to indicate whether the terminal has the capability of joint mapping of multiple CSIs.

12. A channel state information (CSI) transmission method, comprising: a network side device receiving a CSI report from a terminal, wherein the CSI report includes a second CSI; the network side device demapping the second CSI into a plurality of first CSIs; wherein the plurality of first CSIs correspond to or are associated with different measurement resources, respectively.

13. The method of claim 12, wherein, In the case that the CSI report further includes sixth indication information, and the sixth indication information is used to indicate a mapping order of at least part of the plurality of first CSIs, the order of the plurality of first CSIs obtained by the network side device demapping is the same as the mapping order indicated by the sixth indication information.

14. The method of claim 13, wherein, The sixth indication information is also used to indicate an order of other objects in addition to the mapping order of at least part of the plurality of first CSIs, and the other objects include channel quality indicators (CQIs).

15. The method of any one of claims 12-14, wherein, The method further includes: The network side device sends target configuration information to the terminal; wherein the target configuration information is used to indicate to the terminal a mapping order of at least part of the plurality of first CSIs.

16. The method of claim 15, wherein, The target configuration information includes at least one of the following: first indication information, used to indicate a mapping order of at least part of the plurality of first CSIs; second indication information, used to indicate an order of at least part of the plurality of first CSIs after demapping; third indication information, used to indicate at least one measurement resource group, and the mapping order of the first CSI corresponds to or is associated with an order of measurement resources in the measurement resource group; fourth indication information, used to indicate a target rule, and the target rule is used to describe a determination manner of the mapping order of at least part of the plurality of first CSIs; fifth indication information, used to indicate an order of a plurality of measurement resources, and the mapping order of the first CSI corresponds to or is associated with the order of the measurement resources.

17. The method of claim 16, wherein, The fourth indication information includes at least one of the following: a first identifier, used to identify the target rule; first description information, used to describe content in the target rule.

18. The method of any one of claims 12-16, wherein, The measurement resource is associated with at least one of a measurement beam, a measurement frequency point, and a transmission mode.

19. The method of any one of claims 12-18, wherein, The method further includes: The network side device receives terminal capability information from the terminal; wherein the terminal capability information is used to indicate whether the terminal has the capability of joint mapping of multiple CSIs.

20. A channel state information (CSI) transmission apparatus, comprising: The processing module is configured to jointly map the multiple first CSIs into a second CSI. The transmission module is configured to transmit a CSI report to a network side device. The CSI report includes the second CSI, and the multiple first CSIs correspond to or are associated with different measurement resources respectively.

21. The apparatus of claim 20, wherein, The multiple first CSIs are jointly mapped into the second CSI by: determining a mapping order of the multiple first CSIs; and jointly mapping the multiple first CSIs into the second CSI according to the mapping order of the multiple first CSIs and based on a predetermined mapping relationship. The mapping order of the multiple first CSIs is the same as a CSI mapping order supported by the predetermined mapping relationship.

22. A channel state information (CSI) transmission apparatus, comprising: a transmission module configured to receive a CSI report from a terminal, wherein the CSI report includes a second CSI; a processing module configured to demap the second CSI into multiple first CSIs. The multiple first CSIs correspond to or are associated with different measurement resources respectively.

23. The apparatus of claim 22, wherein, The transmission module is further configured to transmit target configuration information to the terminal, wherein the target configuration information is used to indicate a mapping order of at least part of the multiple first CSIs to the terminal.

24. A terminal comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement steps of the method according to any one of claims 1 to 11.

25. A network side device comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement steps of the method according to any one of claims 12 to 19.

26. A readable storage medium, wherein the readable storage medium stores programs or instructions, and the programs or instructions are executed by a processor to implement steps of the method according to any one of claims 1 to 11, or to implement steps of the method according to any one of claims 12 to 19.

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