Channel state information feedback method and device

Abstract

The embodiment of the invention provides a channel state information feedback method and device. The method comprises the following steps that: terminal equipment receives report configuration from network equipment, wherein the report configuration comprises codebook indication information and feedback configuration information; measuring the channel state information reference signal to obtain channel state information; processing the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and feeding back the first channel state information to the network device.

Description

Channel state information feedback method and device Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] Multi-antenna technology has been widely adopted in LTE, LTE-A, and 5G NR systems. In particular, massive MIMO (massive MIMO) technology has been well supported in the 5G standard. It is foreseeable that massive MIMO will be even more widely used in the 5G-Advanced and 6G phases. Performance-enhancing massive and ultra-large-scale antenna technologies are also a research focus for next-generation mobile communication systems.

[0003] With the advancement of artificial intelligence (AI) and machine learning (ML) technologies, applying AI / ML to wireless communications to overcome the difficulties of traditional methods has become a current technological trend. The application of AI / ML models to wireless communication systems, particularly in air interface transmission, is a new technology in the 5G-Advanced and 6G phases.

[0004] For example, for channel state information (CSI) measurement and feedback, the terminal device measures CSI and uses an AI / ML model to generate CSI feedback information. This information is then sent to the network device via the air interface. The network device then receives the CSI feedback information and uses the corresponding AI / ML model to recover the original CSI. In such cases, the AI / ML model can reduce CSI feedback overhead or improve feedback quality, thereby improving communication quality.

[0005] For another example, similarly, the information from the sender (network device or terminal device) is processed by the AI / ML model and then sent to the receiver (terminal device or network device) through the air interface. The receiver uses a model corresponding to the sender's AI / ML model to restore the information input into the AI / ML model. This type of AI / ML model is usually called a two-sided model.

[0006] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0007] Summary of the Invention

[0008] However, the inventors have discovered that the channel state information ultimately obtained by network devices can be inaccurate. For example, the channel state information obtained by the network device may differ significantly from the actual downlink channel over which it will be used for information transmission, resulting in reduced or no precoding gain. Therefore, high-precision channel state information feedback is required to enable network devices to verify the accuracy of the channel state information feedback.

[0009] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for feeding back channel state information.

[0010] According to one aspect of an embodiment of the present application, a method for feeding back channel state information is provided, including:

[0011] The terminal device receives a reported configuration from the network device, wherein the reported configuration includes codebook indication information and feedback configuration information;

[0012] The terminal device measures a channel state information reference signal to obtain channel state information;

[0013] Processing the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and

[0014] Feedback the first channel state information to the network device.

[0015] According to another aspect of an embodiment of the present application, a channel state information feedback device is provided, including:

[0016] a receiving unit configured to receive a reported configuration from a network device, wherein the reported configuration includes codebook indication information and feedback configuration information;

[0017] a processing unit that measures a channel state information reference signal to obtain channel state information; and processes the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and

[0018] A sending unit is configured to feed back the first channel state information to the network device.

[0019] According to another aspect of an embodiment of the present application, a method for feeding back channel state information is provided, including:

[0020] The terminal device receives a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information used to configure similarity of channel state information reported by the terminal device;

[0021] The terminal device measures a channel state information reference signal to obtain channel state information;

[0022] Processing the channel state information according to the feedback configuration information to obtain first channel state information, and calculating similarity information based on the channel state information corresponding to the feedback configuration information; and

[0023] Feedback the first channel state information and / or the similarity information to the network device.

[0024] According to another aspect of an embodiment of the present application, a channel state information feedback device is provided, including:

[0025] A receiving unit, configured to receive a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring similarity of channel state information reported by a terminal device;

[0026] a processing unit that measures a channel state information reference signal to obtain channel state information; processes the channel state information according to the feedback configuration information to obtain first channel state information, and calculates similarity information based on the channel state information corresponding to the feedback configuration information; and

[0027] A sending unit is configured to feed back the first channel state information and / or the similarity information to the network device.

[0028] According to another aspect of an embodiment of the present application, a method for feeding back channel state information is provided, including:

[0029] The terminal device receives similarity request information from the network device;

[0030] estimating feedback configuration information for reporting channel state information according to the similarity requirement information, and feeding back the feedback configuration information to the network device;

[0031] The terminal device receives reporting configuration information of the first channel state information sent by the network device, wherein the reporting configuration information is generated by the network device according to feedback configuration information fed back by the terminal device;

[0032] The terminal device measures a channel state information reference signal to obtain channel state information;

[0033] The terminal device processes the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and

[0034] Feedback the first channel state information to the network device.

[0035] According to another aspect of an embodiment of the present application, a channel state information feedback device is provided, including:

[0036] a receiving unit configured to receive similarity requirement information from a network device;

[0037] a processing unit, configured to estimate feedback configuration information for channel state information reporting based on the similarity requirement information; and

[0038] a sending unit configured to feed back the feedback configuration information to the network device;

[0039] The receiving unit further receives reporting configuration information of the first channel state information sent by the network device, wherein the reporting configuration information is generated by the network device according to feedback configuration information fed back by the terminal device;

[0040] The processing unit measures a channel state information reference signal to obtain channel state information; processes the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and

[0041] The sending unit feeds back the first channel state information to the network device.

[0042] One of the beneficial effects of the embodiments of the present application is that: a terminal device receives a reporting configuration from a network device, wherein the reporting configuration includes codebook indication information and feedback configuration information; the terminal device processes channel state information according to the codebook indication information and feedback configuration information to obtain first channel state information; and the terminal device feeds back the first channel state information to the network device. As a result, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0043] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0044] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0045] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0047] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0048] FIG2 is a schematic diagram of a method for feeding back channel state information according to an embodiment of the present application;

[0049] FIG3 is an example diagram of channel state information feedback according to an embodiment of the present application;

[0050] FIG4 is a schematic diagram of a method for feeding back channel state information according to an embodiment of the present application;

[0051] FIG5 is an example diagram of channel state information feedback according to an embodiment of the present application;

[0052] FIG6 is an example diagram of channel state information feedback according to an embodiment of the present application;

[0053] FIG7 is another example diagram of channel state information feedback according to an embodiment of the present application;

[0054] FIG8 is a schematic diagram of a method for feeding back channel state information according to an embodiment of the present application;

[0055] FIG9 is a schematic diagram of a channel state information feedback device according to an embodiment of the present application;

[0056] FIG10 is another schematic diagram of a channel state information feedback device according to an embodiment of the present application;

[0057] FIG11 is a schematic diagram of a network device according to an embodiment of the present application;

[0058] FIG12 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0059] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0060] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0061] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0062] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0063] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other communication protocols currently known or to be developed in the future.

[0064] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0065] Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio head (RRH, Remote Radio Head), remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). The term "base station" can include some or all of their functions. Each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0066] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0067] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0068] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0069] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0070] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0071] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0072] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0073] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0074] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, an MIB, system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0075] In embodiments of the present application, one or more AI / ML models may be configured and run in a network device and / or a terminal device. The AI / ML models may be used for various signal processing functions in wireless communications, such as CSI estimation and reporting, beam management, and beam prediction, etc.; the present application is not limited thereto.

[0076] The network device configures the terminal device to feedback CSI information, especially the channel state information used for downlink precoding, such as the precoding matrix indicator (PMI). In traditional methods, the terminal device uses a codebook index based on the codebook for feedback, such as feedback based on Rel-15 Type 1 and Type 2 codebooks, or based on Rel-16 Type 2 codebooks, or based on Rel-17 and Rel-18 codebooks, etc., as well as the quantized codebook vector and corresponding indication information for the wireless channel between the network device and the terminal device defined in subsequent Releases or 6G. Considering the mobility of the terminal device and the delay of the feedback channel, there may be a poor match between the channel feedback received by the network device and the channel traversed by the precoded signal transmitted based on the feedback.

[0077] On the other hand, because feedback using channel state information with relatively high quantization accuracy results in high feedback overhead, the terminal device can use AI / ML algorithms to compress the channel state information and feed the compressed and quantized information back to the network device. The network device then uses the decompression model corresponding to the terminal device to recover the channel state information.

[0078] However, all of the above processes may result in inaccurate channel state information ultimately obtained by the network device. For example, the channel state information obtained by the network device may differ significantly from the actual downlink channel over which it will be used for information transmission, resulting in reduced or no precoding gain. Therefore, high-precision channel state information feedback is required for network devices to verify the accuracy of the channel state information feedback.

[0079] Embodiments of the first aspect

[0080] The embodiment of the present application provides a method for feeding back channel state information (CSI). FIG2 is a schematic diagram of the method for feeding back channel state information according to the embodiment of the present application. As shown in FIG2 , the method includes:

[0081] 201. The terminal device receives a reported configuration from a network device, where the reported configuration includes codebook indication information and feedback configuration information.

[0082] 202. The terminal device measures a channel state information reference signal to obtain channel state information;

[0083] 203. The terminal device processes the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and

[0084] 204. The terminal device feeds back the first channel state information to the network device.

[0085] It is worth noting that FIG2 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG2 above.

[0086] In an embodiment of the present application, the network device configures not only codebook indication information but also feedback configuration information, so that the terminal device can obtain more information and generate high-precision CSI (first channel state information). This high-precision CSI can be used to verify the AI / ML model. For example, this high-precision CSI can be used as label data for the AI / ML model. As a result, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0087] Figure 3 is an example diagram of channel state information feedback in an embodiment of the present application. As shown in Figure 3, after the terminal device obtains the channel state information, it can select a codebook based on the HiR_CSI parameters (for example, parameters obtained based on the codebook indication information and / or feedback configuration information) and generate HiR_CSI (first channel state information). After receiving the HiR_CSI, the network device can perform operations such as codebook reconstruction and use the reconstructed HiR_CSI as verification information (for example, label data) for channel state information feedback.

[0088] In the embodiment of the present application, the network device can send CSI-RS to the terminal device, so that the terminal device performs CSI measurement based on the CSI-RS. For details about CSI-RS, CSI measurement and its configuration, please refer to the relevant technology and will not be repeated here.

[0089] In some embodiments, the feedback configuration information includes at least one of the following information: information on the number of DFT basis vectors, information on the number of amplitude bits, information on the number of phase bits, information on time domain basis vectors, information on Doppler basis vectors, information related to delay, or information related to the number of CSI feedback bits. The present application is not limited to the above information and may also include other information.

[0090] In some embodiments, the feedback configuration information is used to indicate the terminal device's quantization method for channel state information; processing the channel state information includes: quantizing the channel state information based on the feedback configuration information and generating feedback bit information according to predefined rules in the code book corresponding to the code book indication information.

[0091] For example, if the feedback configuration information includes the number of CSI feedback bits, the terminal device can quantize the channel state information according to the number of CSI feedback bits and generate feedback bit information.

[0092] For example, the Type2 codebook has the following configuration parameters:

[0093] Table 1

[0094]

[0095] For example, L represents the number of DFT basis vectors or DFT beams. According to existing standards, its maximum value is 4. To improve the similarity between the feedback information and the original information, or to enhance quantization accuracy, a higher L value, such as 8, 10, or 16, can be configured.

[0096] For the Rel-16e-Type2 codebook, the following parameters are further included:

[0097] Table 2

[0098] Parameters of e-TypeⅡcodebook

[0099]

[0100] Table 3

[0101] PMI of codebookType=e-TypeⅡ

[0102]

[0103] Table 4

[0104] Codebook parameter configurations for L,βand p υ

[0105]

[0106] The definitions of the above parameters can be found in the standard document 3GPP 38.214, and no further explanation is given here.

[0107] Using the codebook defined based on the standard, for the following set of parameters, there may be the following examples:

[0108] For example, if the subband amplitude adopts 3-bit quantization, other parameters are given in Table 5 below, and the obtained GCS and SGCS are shown in the last two columns of Table 5. In the first column, pc represents paramCombination-r16.

[0109] Table 5

[0110]

[0111]

[0112] It can be seen that the highest square similarity SGCS can only reach 0.8324, which is not accurate enough to be used as a model monitoring or training label.

[0113] To improve feedback accuracy, parameters other than those supported by the standard can be used. Alternatively, some parameters may be parameters other than those supported by the standard, but channel quantization and feedback may still be performed according to the criteria of the Rel-16 Type 2 codebook. The results are shown in Table 6 below.

[0114] Table 6

[0115] Subband amplitude coefficient quantization 3bit

[0116]

[0117] Referring to the last row of Table 6, the number of feedback bits is 1424, and the corresponding SGCS can reach 0.9212.

[0118] This shows that while the feedback configuration information is used to configure parameter configuration information beyond the number of configurations supported by existing standards, the corresponding feedback bit information and number of feedback bits can still be derived based on the codebook provisions of existing standards. When the total number of feedback bits corresponding to the feedback configuration information is relatively high, quantization accuracy is significantly improved, and the similarity of the feedback channel information is also improved.

[0119] It can be seen that, generally, the larger the number of bits corresponding to the feedback configuration information is, the higher the quantization accuracy of the first channel state information is.

[0120] For example, the more DFT basis vectors there are, and / or the more amplitude bits there are, and / or the more phase bits there are, and / or the more time domain basis vectors there are, and / or the more Doppler basis vectors there are, and / or the longer the delay is, and / or the more CSI feedback bits there are, the higher the quantization accuracy of the channel state information.

[0121] Furthermore, the inventors discovered that different parameter configuration combinations correspond to different quantization accuracies. Under different feedback parameter configurations, a higher total number of feedback bits does not necessarily equate to higher quantization accuracy. Instead, there are relatively optimized configuration combinations that can achieve excellent quantization results with relatively low feedback overhead.

[0122] For example, Table 7 below shows some evaluation results:

[0123] Table 7

[0124] Subband amplitude coefficient quantization 4bit

[0125]

[0126] Here, the subband amplitude uses 4 bits, and the parameter configuration is shown in Table 7 above. For example, the performance is 0.9319 when the total number of bits is 730, which is higher than the performance after the configuration of 1424 bits in Table 6 above. Using the configuration in Table 7 (corresponding to the last row), with a total number of bits of 1579, the SGCS accuracy reaches 0.9762. This improvement is largely due to the change from 3-bit quantization to 4-bit quantization of the subband amplitude coefficients.

[0127] For example, if the sub-band amplitude coefficient quantization still adopts 4 bits, other parameters are changed as shown in Table 8.

[0128] Table 8

[0129]

[0130] As shown in Table 8, the results of SGCS are also different. For example, even if the subband amplitude coefficients are quantized using 4 bits and the number of bits in the last row is 537, the SGCS is still only 0.87.

[0131] In some embodiments, the network device may configure the total number of feedback bits to be larger as needed, that is, to configure the total number of feedback bits to be greater than a threshold. Generally speaking, the larger the total number of feedback bits, the higher the accuracy of the fed-back CSI.

[0132] In some embodiments, the terminal device may combine various feedback parameters of the feedback configuration information and / or select one or more feedback parameters. This may result in better CSI accuracy or quantization performance, or lower overhead for the same performance, even when the total number of feedback bits remains the same.

[0133] In some embodiments, the terminal device may also send the selected feedback parameters and / or parameter combinations to the network device. The network device generates appropriate feedback configuration information based on the feedback from the terminal device and sends it to the terminal device for CSI reporting.

[0134] In some embodiments, the above-mentioned different configurations can be indicated by different configuration IDs, and the association between the configuration ID and the configuration combination can be given by predefinition or configured by RRC signaling.

[0135] In this embodiment of the present application, the codebook indication information can indicate the type of codebook used to generate CSI information. However, the parameters configured by the network may not be consistent with the parameters predefined in the codebook. By using the codebook indication information and feedback configuration information, a channel state information quantization result that is closer to the actual channel can be generated, and the additional channel quantization overhead is acceptable.

[0136] In some embodiments, the feedback configuration information is represented by a configuration ID.

[0137] In some embodiments, a configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0138] Table 9 shows an example of feedback configuration information.

[0139] Table 9

[0140]

[0141] Table 19 shows another example of feedback configuration information.

[0142] Table 10

[0143] Configure ID codebook parameter 1 bit Digital codebook parameter 2 bit Digital codebook parameter 3 bit number Total number of CSI feedback bits 001A11B11C11G11002A12B12C12G12003A13B13C13G11……………

[0144] As shown in Table 9, for example, a network device can only send information with configuration ID = 001. The terminal device can then obtain information about the number of DFT basis vectors, the number of amplitude bits, the number of phase bits, time domain basis vectors, Doppler basis vectors, delay-related information, or information about the number of CSI feedback bits. This allows the terminal device to provide feedback on CSI with higher accuracy. Not all column parameters in Table 9 are required; for example, one configuration ID can correspond to one or several column parameters.

[0145] As shown in Table 10, for example, a network device can only send information for configuration ID = 001. This allows the terminal device to obtain information about the number of bits of one or more codebook parameters or the number of CSI feedback bits. This allows the terminal device to provide more accurate CSI feedback. Not all column parameters are required in Table 10; for example, one configuration ID can correspond to one or more column parameters.

[0146] In some embodiments, the configuration ID further corresponds to an indication of the number of multi-antenna layers (MIMO layer indication).

[0147] In some embodiments, one total number of feedback bits corresponds to multiple different codebook parameter bit configurations, and / or multiple total numbers of feedback bits correspond to multiple different codebook parameter bit configurations.

[0148] For example, as shown in Table 10, more generally, different configuration IDs correspond to different combinations of codebook parameter bit numbers. For example, for the same total number of feedback bits, different codebook parameter bit number configurations can be used, as shown in Table 10 for configuration IDs 001 and 003. For another example, for different total numbers of feedback bits, different codebook parameter bit number configurations can be used, as shown in Table 10 for configuration IDs 001 and 002. Other possible configurations are not listed here.

[0149] In some embodiments, different feedback configuration information corresponds to different total numbers of feedback bits and different codebook parameters, or different feedback configuration information corresponds to the same total number of feedback bits but different specific codebook parameters. However, the similarity level or quantization accuracy corresponding to different configurations is expected to be different.

[0150] Therefore, by feeding back configuration information, the network device can require the terminal device to feed back CSI of different accuracies as needed, which can further improve the efficiency of CSI feedback.

[0151] In some embodiments, the codebook indication information indicates one of the following codebooks: Rel-15 type 2 codebook, Rel-16 type 2 codebook, Rel-18 type 2 codebook, Rel-18 other type codebook, Rel-19 codebook, or a codebook of a later version, or an AI / ML-specific codebook. However, the present application is not limited thereto, and for example, other codebooks may also be indicated.

[0152] In some embodiments, the feedback of the first channel state information is aperiodic reporting.

[0153] For example, when a network device determines that channel state information feedback verification is required, it can send codebook indication information and feedback configuration information to the terminal device, configuring the terminal device to report the first channel state information (high-precision CSI). In this way, the first channel state information can be reported as needed, avoiding excessive resource consumption and reducing overall system overhead.

[0154] In some embodiments, the reporting configuration further instructs the terminal device to report the first channel state information based on a rank equal to 1 (RANK=1).

[0155] For example, for a model based on a single-layer eigenvector, in addition to configuring the above-mentioned codebook indication information and feedback configuration information, the network device may also configure the terminal device to provide feedback of the first channel state information based on RANK=1.

[0156] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0157] As can be seen from the above embodiment, a terminal device receives a reporting configuration from a network device, wherein the reporting configuration includes codebook indication information and feedback configuration information; the terminal device processes the channel state information based on the codebook indication information and feedback configuration information to obtain first channel state information; and the terminal device feeds back the first channel state information to the network device. As a result, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0158] Embodiments of the second aspect

[0159] The embodiment of the present application provides a method for feedback of channel state information (CSI). The embodiment of the second aspect can be combined with the embodiment of the first aspect, or can be implemented separately, and the same contents as the embodiment of the first aspect will not be repeated.

[0160] FIG4 is a schematic diagram of a method for feeding back channel state information according to an embodiment of the present application. As shown in FIG4 , the method includes:

[0161] 401. A terminal device receives a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information used to configure similarity of channel state information reported by the terminal device;

[0162] 402. The terminal device measures a channel state information reference signal to obtain channel state information;

[0163] 403: Process the channel state information according to the feedback configuration information to obtain first channel state information, and calculate similarity information based on the channel state information corresponding to the feedback configuration information; and

[0164] 404 : Feedback the first channel state information and / or the similarity information to the network device.

[0165] It is worth noting that FIG4 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG4 above.

[0166] In an embodiment of the present application, the network device is configured with not only feedback configuration information but also similarity indication information, thereby enabling the network device to obtain not only high-precision CSI (first channel state information) but also similarity information. The high-precision CSI and / or similarity information can be used to verify the AI / ML model, for example, the high-precision CSI and / or similarity information can be used as label data for the AI / ML model. As a result, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0167] Figure 5 is an example diagram of channel state information feedback in an embodiment of the present application. As shown in Figure 5, for example, a terminal device can use an AI / ML algorithm (such as a CSI compression neural network in a CSI generator) to compress the channel state information. The compressed CSI is sent by the terminal device to the network device, and the network device uses a corresponding AI / ML algorithm (such as a CSI decompression neural network in a CSI reconstructor) to reconstruct the channel state information.

[0168] Due to the richness, diversity, and variability of wireless channels, the channel information used during training of the neural networks in the CSI generator and CSI reconstructor may not be consistent with the channel information characteristics of the wireless environment in which they are used. As a result, the channel state information reconstructed by the CSI reconstructor may be inaccurate or highly inconsistent with the actual corresponding channel state information (i.e., low similarity).

[0169] To determine the accuracy of the CSI reconstructed by the CSI reconstructor, network devices can configure and schedule terminal devices to provide high-precision CSI feedback. This high-precision CSI can be used as ground truth labels to assess the performance of the CSI generator / reconstructor.

[0170] For example, the network device may send feedback configuration information and / or similarity indication information to the terminal device. As shown in Figure 5, the terminal device may obtain corresponding parameters (e.g., quantization parameters, codebook information, etc.) based on the feedback configuration information, then process the channel state information to obtain first channel state information (e.g., high-precision CSI), and calculate similarity information based on the similarity indication information. After obtaining the first channel state information and / or similarity information, the network device may reconstruct the information and use the reconstructed information for verification of the CSI generator / CSI reconstructor.

[0171] For example, this information can be used to fine-tune the AI / ML model; for another example, this information can be used to monitor the AI / ML model; for another example, this information can be used for online or offline training of the AI / ML model, etc.; this application is not limited to this.

[0172] FIG5 is merely an exemplary illustration of an embodiment of the present application, but the present application is not limited thereto. For example, the first channel state information and / or similarity information may also be used for verification of non-AI / ML channel state information feedback. Furthermore, FIG5 may also be applicable to the aforementioned embodiment of the first aspect or the embodiment of the third aspect described later.

[0173] In some embodiments, the similarity information is calculated based on channel state information corresponding to the feedback configuration information and channel state information estimated via the channel state information reference signal (CSI-RS).

[0174] For example, the terminal device quantizes the channel state information based on the feedback configuration information to obtain high-precision channel state information, and feeds it back to the network device via the uplink channel. Furthermore, the terminal device calculates the degree of similarity between the high-precision channel state information and the channel state information before quantization. This degree of similarity is predefined or configurable, for example, using GCS, SGCS, etc.

[0175] Here, GCS or SGCS can represent the similarity between the channel state information before and after quantization, as shown in Table 11:

[0176] Table 11

[0177]

[0178]

[0179] For example, this metric can be simply understood as representing the similarity between the channel state information before and after quantization. For CSI feedback from terminal devices, in addition to the feedback information itself, network equipment wants to know the similarity between the quantized CSI information and the channel information before quantization before passing through the air interface. This value helps network equipment use labeled data to verify the performance of CSI information reconstruction performed by AI / ML models.

[0180] In some embodiments, the similarity information is represented by multiple bits.

[0181] In some embodiments, the similarity is expressed based on a predefined rule, or the similarity is expressed based on a configuration of Radio Resource Control (RRC) signaling.

[0182] For example, similarity information also needs to be quantified, and the quantization can be based on predefined rules. For example, N bits can be used for indication, and different N bits correspond to different similarity levels.

[0183] For example, using bit 00 corresponds to a similarity of 0.9, 01 corresponds to a similarity of 0.95, 10 corresponds to a similarity of 0.98, 11 corresponds to a similarity of 0.99, etc. The above is only an example of an embodiment of the present application, and other methods are also possible, and the present application is not limited thereto.

[0184] In some embodiments, the feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay related information, or CSI feedback bit number related information.

[0185] In some embodiments, one total number of feedback bits corresponds to multiple different codebook parameter bit configurations, and / or multiple total numbers of feedback bits correspond to multiple different codebook parameter bit configurations.

[0186] For example, different feedback configuration information corresponds to different combinations of codebook parameter bit counts. For example, for the same total number of feedback bits, different codebook parameter bit count configurations can be used; for another example, for different total number of feedback bits, different codebook parameter bit count configurations can be used. Other possibilities are not listed here. The codebook parameters can specifically be the parameters described in the above-mentioned embodiment, or other possible codebook parameters used for channel information quantization.

[0187] In some embodiments, the feedback configuration information is represented by a configuration ID.

[0188] In some embodiments, a configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0189] In some embodiments, the configuration ID further corresponds to an indication of the number of multi-antenna layers (MIMO layer indication).

[0190] In some embodiments, the terminal device may further receive a second reporting configuration from the network device; generate second channel state information based on the second reporting configuration; and feed back the second channel state information to the network device.

[0191] For example, the second channel state information may be generated by a channel state information generation method based on AI / ML, or by a channel state information generation method based on an AI / ML codebook, or by a channel state information generation method with a low feedback information amount.

[0192] In some embodiments, the first channel state information is channel feedback information of an uplink high payload, and the second channel state information is channel feedback information of an uplink low payload.

[0193] Thus, the network device can receive the similarity information and / or the first CSI information and the second CSI information. The network device can further improve the performance of the CSI generator and CSI reconstructor by comparing the difference between the first CSI information and the second CSI information, or obtain the loss function required for training the CSI generator and CSI reconstructor.

[0194] In some embodiments, the terminal device feeds back the first channel state information and / or the similarity information to the network device non-periodically.

[0195] In some embodiments, the terminal device feeds back the first channel state information and / or the similarity information to the network device semi-continuously or periodically multiple times.

[0196] For example, network devices can configure terminal devices to provide multiple high-precision CSI feedback reports, with semi-continuous or periodic reporting. Network devices can use these multiple high-precision CSI reports to monitor AI / ML model performance or fine-tune AI / ML model parameters.

[0197] In some embodiments, the terminal device receives a group of CSI-RS (CS-RS burst) including multiple CSI-RSs configured by the network device; and feeds back the first channel state information and / or the similarity information for the group of CSI-RS (CS-RS burst).

[0198] Figure 6 illustrates an example of channel state information feedback according to an embodiment of the present application. A network device configures a terminal device to provide CSI feedback (reporting), which may include resource configuration and reporting configuration. As shown in Figure 6, the resource configuration includes a set of CSI-RSs, also referred to as a CSI-RS burst.

[0199] As shown in Figure 6, in a single reporting configuration, the terminal device is configured to feedback corresponding multiple CSI channel state information. This reporting is aperiodic reporting, which can report multiple high-precision channel state information in a single report, corresponding to multiple CSI-RSs in a CSI-RS burst.

[0200] In some embodiments, the interval between two adjacent CSI-RSs in a group of CSI-RSs (CS-RS burst) is smaller than a typical CSI-RS period. For example, the duration of a CSI-RS burst is very short and can be much smaller than a typical CSI-RS period.

[0201] For example, the typical CSI-RS period is 4 slots; the group of CSI-RSs (CS-RS burst) is transmitted within a time window; and the time window is 1 slot, 4 slots, or 5 ms. The present application is not limited thereto. For another example, the CS-RS burst refers to multiple CSI-RSs transmitted in a dense manner, where the interval between two CSI-RSs is smaller than the minimum CSI-RS period, and may be less than one slot.

[0202] In some embodiments, the terminal device receives multiple CSI-RSs configured by the network device; and feeds back the first channel state information and / or the similarity information for the multiple CSI-RSs.

[0203] Figure 7 is another example diagram of channel state information feedback in an embodiment of the present application. The network device configures the terminal device to provide CSI feedback (reporting), and the feedback is completed within a feedback time unit. That is, the CSI feedback can be for multiple CSI-RSs, feeding back multiple high-precision CSIs at a time.

[0204] For example, the feedback time unit includes at least one of the following: a symbol, a time slot, multiple slots, multiple symbols, and a subframe. The present application is not limited thereto, and the specific length of the feedback time unit can be determined according to actual needs.

[0205] In some embodiments, the feedback time unit is configured through RRC signaling; the present application is not limited thereto.

[0206] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0207] As can be seen from the above embodiment, the terminal device receives a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information; obtains first channel state information based on the feedback configuration information, and calculates similarity information based on the similarity indication information; and feeds back the first channel state information and / or the similarity information to the network device. As a result, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0208] Embodiments of the third aspect

[0209] The embodiment of the present application provides a method for feeding back channel state information (CSI). The embodiment of the third aspect can be combined with the embodiments of the first and second aspects, or can be implemented separately, and the contents that are the same as those of the embodiments of the first and second aspects will not be repeated.

[0210] FIG8 is a schematic diagram of a method for feeding back channel state information according to an embodiment of the present application. As shown in FIG8 , the method includes:

[0211] 801, the terminal device receives similarity request information from the network device;

[0212] 802. Estimating feedback configuration information for reporting channel state information according to the similarity requirement information, and feeding back the feedback configuration information to the network device;

[0213] 803. The terminal device receives reporting configuration information of first channel state information sent by a network device, where the reporting configuration information is generated by the network device according to feedback configuration information fed back by the terminal device.

[0214] 804, the terminal device measures a channel state information reference signal to obtain channel state information;

[0215] 805. The terminal device processes the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and

[0216] 806. Feedback the first channel state information to the network device.

[0217] It is worth noting that FIG8 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG8 above.

[0218] In the embodiments of the present application, it is considered that for a given total number of feedback bits, different combinations of codebook parameters may result in different similarities. This is due to the characteristics of the channel, which can be estimated by the terminal device using the CSI-RS.

[0219] Therefore, the network device can send similarity requirement information to the terminal device based on the accuracy requirements of the label data of model monitoring or model training. The terminal device estimates the feedback configuration information that can achieve the similarity based on the channel information estimated by the CSI-RS and the similarity requirement information sent by the network device. The feedback configuration information includes the number of bits corresponding to each code book parameter and / or the total number of feedback bits, and the terminal device feeds back the feedback configuration information to the network device. The network device further sends the CSI reporting configuration to the terminal device based on this feedback configuration information. In this way, the channel state information reporting of the terminal device can not only meet the quantization accuracy or similarity requirements of the network device, but also use the optimal code book parameter bit combination and the total number of feedback bits for feedback.

[0220] In an embodiment of the present application, the network device sends similarity requirement information and the terminal device estimates and feeds back configuration information, thereby enabling the network device to obtain high-precision CSI (first channel state information). This high-precision CSI can be used to verify the AI / ML model, for example, by using this high-precision CSI as label data for the AI / ML model. As a result, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0221] In some embodiments, the similarity requirement information is used to indicate to the terminal device: the degree of similarity between the channel state information that the network device expects the terminal device to feed back and the channel state information estimated by the terminal device based on a channel state information reference signal (CSI-RS).

[0222] For example, the representation of the similarity level is predefined or configured, for example, it can be represented by GCS, SGCS, etc. Please refer to Table 2 and Table 4 above. The similarity requirement information can be represented by multiple bits, for example, the similarity can be represented based on a predefined rule, or the similarity can be represented based on the configuration of Radio Resource Control (RRC) signaling.

[0223] For example, N bits may be used for indication, and different N bits correspond to different similarity levels.

[0224] For example, using bit 00 corresponds to a similarity of 0.9, 01 corresponds to a similarity of 0.95, 10 corresponds to a similarity of 0.98, 11 corresponds to a similarity of 0.99, etc. The above is only an example of an embodiment of the present application, and other methods are also possible, and the present application is not limited thereto.

[0225] In some embodiments, the terminal device calculates feedback configuration information required to meet the requirement based on the similarity requirement information and feeds back the feedback configuration information to the network device.

[0226] For example, the network device may send similarity requirement information corresponding to a certain channel state information to the terminal device, and allow the terminal device to estimate the feedback configuration information (such as quantization information parameters) required to achieve the similarity information based on the corresponding similarity information.

[0227] In some embodiments, the feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay related information, or CSI feedback bit number related information.

[0228] In some embodiments, the feedback configuration information is represented by a configuration ID.

[0229] In some embodiments, a configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0230] In some embodiments, the configuration ID further corresponds to an indication of the number of multi-antenna layers (MIMO layer indication).

[0231] Thus, the network device can send similarity requirement information and generate reporting configuration information based on the feedback configuration information fed back by the terminal device. The terminal device obtains first channel state information based on the reporting configuration information and / or the feedback configuration information and feeds it back to the network device. This can further improve the performance of the CSI generator and CSI reconstructor, or obtain the loss function required for training the CSI generator and CSI reconstructor.

[0232] In some embodiments, the terminal device feeds back the first channel state information to the network device non-periodically.

[0233] In some embodiments, the terminal device feeds back the first channel state information to the network device semi-continuously or periodically multiple times.

[0234] For example, network devices can configure terminal devices to provide multiple high-precision CSI feedback reports, with semi-continuous or periodic reporting. Network devices can use these multiple high-precision CSI reports to monitor AI / ML model performance or fine-tune AI / ML model parameters.

[0235] In some embodiments, the terminal device receives a set of CSI-RSs (CS-RS bursts) including a plurality of CSI-RSs configured by the network device, and feeds back the first channel state information for the set of CSI-RSs (CS-RS bursts). For details, please refer to FIG. 6 above.

[0236] In some embodiments, the interval between two adjacent CSI-RSs in a group of CSI-RSs (CS-RS burst) is smaller than a typical CSI-RS period. For example, the duration of a CSI-RS burst is very short and can be much smaller than a typical CSI-RS period.

[0237] For example, the general CSI-RS period is 4 slots; the group of CSI-RS (CS-RS burst) is sent within a time window; the time window is 1 slot, or 4 slots, or 5 ms. The present application is not limited thereto.

[0238] In some embodiments, the terminal device receives multiple CSI-RSs configured by the network device; and feeds back the first channel state information for the multiple CSI-RSs. The feedback is completed within a feedback time unit. That is, the CSI feedback can feed back multiple high-precision CSIs for multiple CSI-RSs at once. For details, please refer to Figure 7 above.

[0239] For example, the feedback time unit includes at least one of the following: a symbol, a time slot, multiple slots, multiple symbols, and a subframe. The present application is not limited thereto, and the specific length of the feedback time unit can be determined according to actual needs.

[0240] In some embodiments, the feedback time unit is configured through RRC signaling; the present application is not limited thereto.

[0241] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0242] As can be seen from the above embodiment, the network device sends similarity requirement information and generates reporting configuration information based on the feedback configuration information fed back by the terminal device. The terminal device obtains first channel state information based on the reporting configuration information and / or the feedback configuration information and feeds it back to the network device. This allows the network device to obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0243] Embodiments of the fourth aspect

[0244] The present application provides a channel state information (CSI) feedback device. The device may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device. The contents that are the same as those in the first to third aspects of the embodiment are not repeated here.

[0245] FIG9 is a schematic diagram of a channel state information feedback apparatus according to an embodiment of the present application. As shown in FIG9 , the channel state information feedback apparatus 900 includes: a receiving unit 901 , a processing unit 902 , and a sending unit 903 .

[0246] In some embodiments, the receiving unit 901 receives a reporting configuration from a network device, wherein the reporting configuration includes codebook indication information and feedback configuration information;

[0247] The processing unit 902 measures a channel state information reference signal to obtain channel state information; and processes the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and

[0248] The sending unit 903 feeds back the first channel state information to the network device.

[0249] In some embodiments, the feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay related information, or CSI feedback bit number related information.

[0250] In some embodiments, the feedback configuration information is used to indicate the terminal device's quantization method for channel state information, and processing the channel state information includes: quantizing the channel state information based on the feedback configuration information and generating feedback bit information according to the predefined rules in the code book corresponding to the code book indication information.

[0251] In some embodiments, the larger the number of bits corresponding to the feedback configuration information, the higher the quantization accuracy of the first channel state information.

[0252] In some embodiments, the feedback configuration information is represented by a configuration ID;

[0253] A configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information; and / or, the configuration ID also corresponds to an indication of the number of multiple antenna layers.

[0254] In some embodiments, different feedback configuration information corresponds to different total numbers of feedback bits and / or quantization precisions.

[0255] In some embodiments, the feedback of the first channel state information is aperiodic reporting.

[0256] In some embodiments, the reporting configuration further instructs the terminal device to report the first channel state information based on a rank equal to 1 (RANK=1).

[0257] In some embodiments, the receiving unit 901 receives a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring similarity of channel state information reported by the terminal device;

[0258] The processing unit 902 measures a channel state information reference signal to obtain channel state information; processes the channel state information according to the feedback configuration information to obtain first channel state information, and calculates similarity information based on the channel state information corresponding to the feedback configuration information; and

[0259] The sending unit 903 feeds back the first channel state information and / or the similarity information to the network device.

[0260] In some embodiments, the similarity information is calculated based on channel state information corresponding to the feedback configuration information and channel state information estimated via the channel state information reference signal (CSI-RS).

[0261] In some embodiments, the similarity information is represented by a plurality of bits;

[0262] The similarity is expressed based on a predefined rule, or is expressed based on a configuration of a radio resource control (RRC) signaling.

[0263] In some embodiments, the receiving unit 901 further receives a second reporting configuration from the network device;

[0264] The processing unit 902 generates second channel state information based on the second reporting configuration; and

[0265] The sending unit 903 feeds back the second channel state information to the network device.

[0266] In some embodiments, the second channel state information is generated by a channel state information generation method based on AI / ML, or the second channel state information is generated by a channel state information generation method based on AI / ML code book, or the second channel state information is generated by a channel state information generation method with low feedback information amount.

[0267] In some embodiments, the first channel state information is channel feedback information of an uplink high payload, and the second channel state information is channel feedback information of an uplink low payload.

[0268] In some embodiments, the sending unit 903 feeds back the first channel state information and / or the similarity information to the network device semi-continuously or periodically for multiple times.

[0269] In some embodiments, the receiving unit 901 receives a group of CSI-RS (CS-RS burst) including multiple CSI-RSs configured by the network device; and the sending unit 903 feeds back the first channel state information and / or the similarity information for the group of CSI-RS (CS-RS burst).

[0270] In some embodiments, the interval between two adjacent CSI-RSs in a group of CSI-RSs (CS-RS burst) is smaller than a normal CSI-RS period.

[0271] In some embodiments, the receiving unit 901 receives multiple CSI-RSs configured by the network device; and the sending unit 903 feeds back the first channel state information and / or the similarity information for the multiple CSI-RSs.

[0272] In some embodiments, the feedback is completed within one feedback time unit;

[0273] The feedback time unit includes at least one of the following: a symbol, a slot, multiple slots, multiple symbols, and a subframe;

[0274] The feedback time unit is configured through RRC signaling.

[0275] In some embodiments, the receiving unit 901 receives similarity requirement information from a network device;

[0276] The processing unit 902 estimates feedback configuration information for channel state information reporting according to the similarity requirement information; and

[0277] The sending unit 903 feeds back the feedback configuration information to the network device;

[0278] The receiving unit 901 further receives reporting configuration information of the first channel state information sent by the network device, wherein the reporting configuration information is generated by the network device according to feedback configuration information fed back by the terminal device;

[0279] The processing unit 902 measures a channel state information reference signal to obtain channel state information; processes the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and

[0280] The sending unit 903 feeds back the first channel state information to the network device.

[0281] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0282] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The channel state information feedback apparatus 900 may also include other components or modules. For details of these components or modules, please refer to the relevant art.

[0283] In addition, for the sake of simplicity, FIG9 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0284] Through the embodiments of the present application, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0285] Embodiments of the fifth aspect

[0286] The present application provides a channel state information (CSI) feedback device. The device may be, for example, a network device, or one or more components or assemblies configured on the network device. The contents that are the same as those in the first to third aspects of the embodiment are not repeated here.

[0287] FIG10 is a schematic diagram of a channel state information feedback apparatus according to an embodiment of the present application. As shown in FIG10 , the channel state information feedback apparatus 1000 includes: a sending unit 1001 and a receiving unit 1002 .

[0288] In some embodiments, the sending unit 1001 sends a reporting configuration to the terminal device, wherein the reporting configuration includes codebook indication information and feedback configuration information; and the receiving unit 1002 receives the first channel state information fed back by the terminal device.

[0289] In some embodiments, the sending unit 1001 sends a first reporting configuration to the terminal device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring the similarity of the channel state information reported by the terminal device; the receiving unit 1002 receives the first channel state information and / or similarity information fed back by the terminal device.

[0290] In some embodiments, the sending unit 1001 sends similarity requirement information to the terminal device; the receiving unit 1002 receives feedback configuration information for channel state information reporting estimated by the terminal device based on the similarity requirement information; and generates reporting configuration information based on the feedback configuration information fed back by the terminal device;

[0291] The sending unit 1001 further sends the reporting configuration information to the terminal device; and the receiving unit 1002 receives the first channel state information fed back by the terminal device.

[0292] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0293] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The channel state information feedback apparatus 1000 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0294] In addition, for the sake of simplicity, FIG10 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0295] Through the embodiments of the present application, the network device can obtain more accurate CSI, thereby improving the accuracy of CSI feedback.

[0296] Embodiments of the sixth aspect

[0297] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents identical to those in the first to fifth aspects of the embodiments will not be repeated.

[0298] In some embodiments, the communication system 100 may include at least:

[0299] A terminal device, comprising: receiving a reporting configuration from a network device, wherein the reporting configuration includes codebook indication information and feedback configuration information; measuring a channel state information reference signal to obtain channel state information; processing the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and feeding back the first channel state information to the network device;

[0300] A network device sends a reporting configuration to a terminal device, wherein the reporting configuration includes codebook indication information and feedback configuration information; and receives first channel state information fed back by the terminal device.

[0301] In some embodiments, the communication system 100 may include at least:

[0302] A terminal device, comprising: receiving a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring similarity of channel state information reported by the terminal device; measuring a channel state information reference signal to obtain channel state information; processing the channel state information according to the feedback configuration information to obtain first channel state information, and calculating similarity information based on the channel state information corresponding to the feedback configuration information; and feeding back the first channel state information and / or the similarity information to the network device;

[0303] A network device sends a first reporting configuration to a terminal device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring the similarity of the channel state information reported by the terminal device; and receives the first channel state information and / or similarity information fed back by the terminal device.

[0304] In some embodiments, the communication system 100 may include at least:

[0305] A terminal device, comprising: receiving similarity requirement information from a network device; estimating feedback configuration information for reporting channel state information based on the similarity requirement information, and feeding back the feedback configuration information to the network device; receiving reporting configuration information for first channel state information sent by the network device; measuring a channel state information reference signal to obtain channel state information; processing the channel state information based on the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and feeding back the first channel state information to the network device;

[0306] A network device that sends similarity requirement information to a terminal device; receives feedback configuration information for reporting channel state information estimated by the terminal device based on the similarity requirement information; generates reporting configuration information based on the feedback configuration information fed back by the terminal device; sends the reporting configuration information to the terminal device; and receives first channel state information fed back by the terminal device.

[0307] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0308] Figure 11 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 11 , network device 1100 may include a processor 1110 (e.g., a central processing unit (CPU)) and a memory 1120 ; the memory 1120 is coupled to the processor 1110 . The memory 1120 may store various data and may also store an information processing program 1130 , which is executed under the control of the processor 1110 .

[0309] For example, the processor 1110 may be configured to execute a program to implement the channel state information feedback method as described in the embodiment of the first aspect. For example, the processor 1110 may be configured to perform the following control: sending a reporting configuration to a terminal device, where the reporting configuration includes codebook indication information and feedback configuration information; and receiving first channel state information fed back by the terminal device.

[0310] For example, the processor 1110 may be configured to execute a program to implement the channel state information feedback method as described in the embodiment of the second aspect. For example, the processor 1110 may be configured to perform the following control: sending a first reporting configuration to a terminal device, where the first reporting configuration includes feedback configuration information and similarity indication information used to configure the similarity of the channel state information reported by the terminal device; and receiving the first channel state information and / or similarity information fed back by the terminal device.

[0311] For example, the processor 1110 may be configured to execute a program to implement the channel state information feedback method as described in the embodiment of the third aspect. For example, the processor 1110 may be configured to perform the following control: sending similarity requirement information to a terminal device; receiving feedback configuration information for channel state information reporting estimated by the terminal device based on the similarity requirement information; generating reporting configuration information based on the feedback configuration information fed back by the terminal device; sending the reporting configuration information to the terminal device; and receiving first channel state information fed back by the terminal device.

[0312] In addition, as shown in FIG11 , the network device 1100 may further include: a transceiver 1140 and an antenna 1150, etc.; wherein, the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that the network device 1100 does not necessarily include all the components shown in FIG11 ; in addition, the network device 1100 may also include components not shown in FIG11 , and reference may be made to the prior art for details.

[0313] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0314] Figure 12 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 12 , terminal device 1200 may include a processor 1210 and a memory 1220. Memory 1220 stores data and programs and is coupled to processor 1210. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0315] For example, the processor 1210 may be configured to execute a program to implement the channel state information feedback method as described in the embodiment of the first aspect. For example, the processor 1210 may be configured to perform the following control: receiving a reporting configuration from a network device, where the reporting configuration includes codebook indication information and feedback configuration information; measuring a channel state information reference signal to obtain channel state information; processing the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and feeding back the first channel state information to the network device.

[0316] For example, the processor 1210 may be configured to execute a program to implement the channel state information feedback method as described in the embodiment of the second aspect. For example, the processor 1210 may be configured to perform the following control: receiving a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring the similarity of the channel state information reported by the terminal device; measuring a channel state information reference signal to obtain channel state information; processing the channel state information according to the feedback configuration information to obtain first channel state information, and calculating similarity information based on the channel state information corresponding to the feedback configuration information; and feeding back the first channel state information and / or the similarity information to the network device.

[0317] For example, the processor 1210 may be configured to execute a program to implement the channel state information feedback method as described in the embodiment of the third aspect. For example, the processor 1210 may be configured to perform the following control: receiving similarity requirement information from a network device; estimating feedback configuration information for channel state information reporting based on the similarity requirement information, and feeding back the feedback configuration information to the network device; receiving reporting configuration information of first channel state information sent by the network device, wherein the reporting configuration information is generated by the network device based on the feedback configuration information fed back by the terminal device; measuring a channel state information reference signal to obtain channel state information; processing the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and feeding back the first channel state information to the network device.

[0318] As shown in Figure 12 , the terminal device 1200 may further include: a communication module 1230, an input unit 1240, a display 1250, and a power supply 1260. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 1200 does not necessarily include all of the components shown in Figure 12 , and these components are not essential. Furthermore, the terminal device 1200 may also include components not shown in Figure 12 , for which reference may be made to the prior art.

[0319] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to perform the channel state information (CSI) feedback method described in the embodiments of the first to third aspects.

[0320] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the channel state information (CSI) feedback method described in the embodiments of the first to third aspects.

[0321] An embodiment of the present application also provides a computer program, wherein when the program is executed in a network device, the program enables the network device to perform the channel state information (CSI) feedback method described in the embodiments of the first to third aspects.

[0322] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the channel state information (CSI) feedback method described in the first to third aspects of the embodiments.

[0323] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0324] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0325] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0326] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0327] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0328] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0329] 1. A method for feeding back channel state information (CSI), comprising:

[0330] The terminal device receives a reported configuration from the network device, wherein the reported configuration includes codebook indication information and feedback configuration information;

[0331] The terminal device measures a channel state information reference signal to obtain channel state information;

[0332] Processing the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; and

[0333] Feedback the first channel state information to the network device.

[0334] 2. The method according to Note 1, wherein the feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0335] 3. The method according to Note 1 or 2, wherein the feedback configuration information is used to indicate a quantization method of the channel state information by the terminal device,

[0336] Processing the channel state information includes: quantizing the channel state information and generating feedback bit information based on the feedback configuration information according to a rule predefined in the codebook corresponding to the codebook indication information.

[0337] 4. The method according to any one of Notes 1 to 3, wherein the larger the number of bits corresponding to the feedback configuration information, the higher the quantization accuracy of the first channel state information.

[0338] 5. The method according to any one of Notes 1 to 4, wherein the feedback configuration information is represented by a configuration ID.

[0339] 6. The method according to Note 5, wherein a configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0340] 7. The method according to Note 5 or 6, wherein the configuration ID also corresponds to an indication of the number of multi-antenna layers (MIMO layer indication).

[0341] 8. The method according to any one of Notes 5 to 7, wherein different configuration IDs correspond to different combinations of codebook parameter bit numbers.

[0342] 9. The method according to any one of Notes 1 to 8, wherein one total number of feedback bits corresponds to multiple different codebook parameter bit configurations, and / or multiple total numbers of feedback bits correspond to multiple different codebook parameter bit configurations.

[0343] 10. The method according to any one of Notes 1 to 9, wherein different feedback configuration information corresponds to different total number of feedback bits and / or quantization accuracy.

[0344] 11. A method according to any one of Notes 1 to 10, wherein different feedback configuration information corresponds to different total number of feedback bits and different codebook parameters, or different feedback configuration information corresponds to the same total number of feedback bits and corresponds to different codebook parameters.

[0345] 12. A method according to any one of Notes 1 to 11, wherein the codebook indication information indicates one of the following codebooks: Rel-15 type 2 codebook, Rel-16 type 2 codebook, Rel-18 type 2 codebook, Rel-18 other type codebook, Rel-19 codebook, or a subsequent version of a codebook, or an AI / ML-specific codebook.

[0346] 13. The method according to any one of Notes 1 to 12, wherein the feedback of the first channel state information is non-periodic reporting.

[0347] 14. The method according to any one of Notes 1 to 13, wherein the reporting configuration further instructs the terminal device to report the first channel state information based on a rank equal to 1 (RANK=1).

[0348] 15. A method according to any one of Notes 1 to 14, wherein the network device configures channel state information feedback for the terminal device through the feedback configuration information, in which the total number of feedback bits is greater than a normal value.

[0349] 16. The method according to any one of Notes 1 to 15, wherein the terminal device combines various feedback parameters of the feedback configuration information and / or selects one or more feedback parameters.

[0350] 17. The method according to Note 16, wherein the terminal device sends the selected feedback parameters and / or parameter combinations to the network device.

[0351] 18. A method according to Note 16 or 17, wherein the selected feedback parameters and / or parameter combinations are represented by a configuration ID; wherein the association between the configuration ID and the feedback parameters and / or parameter combinations is predefined or configured by RRC signaling.

[0352] 19. A method for feeding back channel state information (CSI), comprising:

[0353] The terminal device receives a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information used to configure similarity of channel state information reported by the terminal device;

[0354] The terminal device measures a channel state information reference signal to obtain channel state information;

[0355] Processing the channel state information according to the feedback configuration information to obtain first channel state information, and calculating similarity information based on the channel state information corresponding to the feedback configuration information; and

[0356] Feedback the first channel state information and / or the similarity information to the network device.

[0357] 20. The method according to Note 19, wherein the similarity information is calculated based on the channel state information corresponding to the feedback configuration information and the channel state information estimated via the channel state information reference signal (CSI-RS).

[0358] 21. The method according to Note 19 or 20, wherein the similarity information is represented by multiple bits.

[0359] 22. The method according to Note 21, wherein the similarity is expressed based on a predefined rule, or the similarity is expressed based on the configuration of radio resource control (RRC) signaling.

[0360] 23. A method according to any one of Notes 19 to 22, wherein the feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0361] 24. The method according to any one of Notes 19 to 23, wherein the feedback configuration information is represented by a configuration ID.

[0362] 25. The method according to Note 24, wherein a configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0363] 26. The method according to Note 24 or 25, wherein the configuration ID also corresponds to an indication of the number of multi-antenna layers (MIMO layer indication).

[0364] 27. A method according to any one of Notes 24 to 26, wherein different configuration IDs correspond to different combinations of codebook parameter bit numbers.

[0365] 28. A method according to any one of Notes 19 to 27, wherein one total number of feedback bits corresponds to multiple different codebook parameter bit configurations, and / or multiple total numbers of feedback bits correspond to multiple different codebook parameter bit configurations.

[0366] 29. A method according to any one of Notes 19 to 28, wherein different feedback configuration information corresponds to different total number of feedback bits and / or quantization accuracy.

[0367] 30. A method according to any one of Notes 19 to 29, wherein different feedback configuration information corresponds to different total numbers of feedback bits and different codebook parameters, or different feedback configuration information corresponds to the same total number of feedback bits and corresponds to different codebook parameters.

[0368] 31. The method according to any one of Notes 19 to 30, wherein the method further comprises:

[0369] The terminal device receives a second reporting configuration from the network device;

[0370] generating second channel state information based on the second reporting configuration; and

[0371] The second channel state information is fed back to the network device.

[0372] 32. The method according to Note 31, wherein the second channel state information is generated by a channel state information generation method based on AI / ML, or the second channel state information is generated by a channel state information generation method based on an AI / ML code book, or the second channel state information is generated by a channel state information generation method with a low feedback information amount.

[0373] 33. The method according to Note 31, wherein the first channel state information is channel feedback information of an uplink high payload, and the second channel state information is channel feedback information of an uplink low payload.

[0374] 34. A method according to any one of Notes 19 to 33, wherein the terminal device semi-continuously or periodically feeds back the first channel state information and / or the similarity information to the network device multiple times.

[0375] 35. The method according to any one of Notes 19 to 33, wherein the method further comprises:

[0376] The terminal device receives a group of CSI-RSs (CS-RS burst) including a plurality of CSI-RSs configured by the network device; and

[0377] The first channel state information and / or the similarity information is fed back for the group of CSI-RSs (CS-RS bursts).

[0378] 36. The method according to Note 35, wherein the interval between two adjacent CSI-RSs within a group of CSI-RSs (CS-RS burst) is smaller than a normal CSI-RS period.

[0379] 37. The method according to supplementary note 36, wherein the normal CSI-RS period is 4 slots;

[0380] The group of CSI-RS (CS-RS burst) is sent within a time window; the time window is 1 time slot, or 4 time slots, or 5ms.

[0381] 38. The method according to any one of Notes 19 to 33, wherein the method further comprises:

[0382] The terminal device receives a plurality of CSI-RSs configured by the network device; and

[0383] The first channel state information and / or the similarity information is fed back for the multiple CSI-RSs.

[0384] 39. The method according to any one of Notes 35 to 38, wherein the feedback is completed within one feedback time unit.

[0385] 40. The method according to Note 39, wherein the feedback time unit includes at least one of the following: a symbol, a slot, multiple slots, multiple symbols, and a subframe.

[0386] 41. A method according to Note 39, wherein the feedback time unit is configured through RRC signaling.

[0387] 42. A method for feeding back channel state information (CSI), comprising:

[0388] The terminal device receives similarity request information from the network device;

[0389] estimating feedback configuration information for reporting channel state information according to the similarity requirement information, and feeding back the feedback configuration information to the network device;

[0390] The terminal device receives reporting configuration information of the first channel state information sent by the network device, wherein the reporting configuration information is generated by the network device according to feedback configuration information fed back by the terminal device;

[0391] The terminal device measures a channel state information reference signal to obtain channel state information;

[0392] The terminal device processes the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; and

[0393] Feedback the first channel state information to the network device.

[0394] 43. A method according to Note 42, wherein the similarity requirement information is used to indicate to the terminal device: the degree of similarity between the channel state information that the network device expects the terminal device to feedback and the channel state information estimated by the terminal device based on a channel state information reference signal (CSI-RS).

[0395] 44. The method according to Note 42, wherein the terminal device calculates the feedback configuration information required to meet the requirement based on the similarity requirement information and feeds it back to the network device.

[0396] 45. A method according to any one of Notes 42 to 44, wherein the feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0397] 46. ​​The method according to any one of Notes 42 to 45, wherein the feedback configuration information is represented by a configuration ID.

[0398] 47. A method according to Note 46, wherein a configuration ID corresponds to a combination of at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay-related information, or CSI feedback bit number information.

[0399] 48. The method according to Note 46 or 47, wherein the configuration ID also corresponds to an indication of the number of multi-antenna layers (MIMO layer indication).

[0400] 49. A method according to any one of Notes 46 to 48, wherein different configuration IDs correspond to different combinations of codebook parameter bit numbers.

[0401] 50. A method according to any one of Notes 42 to 49, wherein one total number of feedback bits corresponds to multiple different codebook parameter bit configurations, and / or multiple total numbers of feedback bits correspond to multiple different codebook parameter bit configurations.

[0402] 51. A method according to any one of Notes 42 to 50, wherein different feedback configuration information corresponds to different total number of feedback bits and / or quantization accuracy.

[0403] 52. A method according to any one of Notes 42 to 51, wherein different feedback configuration information corresponds to different total numbers of feedback bits and different codebook parameters, or different feedback configuration information corresponds to the same total number of feedback bits and corresponds to different codebook parameters.

[0404] 53. The method according to any one of Notes 42 to 52, wherein the feedback of the first channel state information is non-periodic reporting.

[0405] 54. A method according to any one of Notes 42 to 52, wherein the terminal device semi-continuously or periodically feeds back the first channel state information to the network device multiple times.

[0406] 55. The method according to any one of Notes 42 to 52, wherein the method further comprises:

[0407] The terminal device receives a group of CSI-RSs (CS-RS burst) including a plurality of CSI-RSs configured by the network device; and

[0408] The first channel state information is fed back for the group of CSI-RSs (CS-RS bursts).

[0409] 56. The method according to Note 55, wherein the interval between two adjacent CSI-RSs within a group of CSI-RSs (CS-RS burst) is smaller than a normal CSI-RS period.

[0410] 57. The method according to note 56, wherein the normal CSI-RS period is 4 slots;

[0411] The group of CSI-RS (CS-RS burst) is sent within a time window; the time window is 1 time slot, or 4 time slots, or 5ms.

[0412] 58. The method according to any one of Notes 42 to 52, wherein the method further comprises:

[0413] The terminal device receives a plurality of CSI-RSs configured by the network device; and

[0414] The first channel state information is fed back for the multiple CSI-RSs.

[0415] 59. A method according to any one of Notes 55 to 58, wherein the feedback is completed within one feedback time unit.

[0416] 60. The method according to Note 59, wherein the feedback time unit includes at least one of the following: a symbol, a slot, multiple slots, multiple symbols, and a subframe.

[0417] 61. A method according to Note 59, wherein the feedback time unit is configured through RRC signaling.

[0418] 62. A method for feeding back channel state information (CSI), comprising:

[0419] The network device sends a reporting configuration to the terminal device, wherein the reporting configuration includes codebook indication information and feedback configuration information; and

[0420] The network device receives first channel state information fed back by the terminal device.

[0421] 63. A method for feeding back channel state information (CSI), comprising:

[0422] The network device sends a first reporting configuration to the terminal device, wherein the first reporting configuration includes feedback configuration information and similarity indication information used to configure the similarity of the channel state information reported by the terminal device;

[0423] The network device receives the first channel state information and / or similarity information fed back by the terminal device.

[0424] 64. A method for feeding back channel state information (CSI), comprising:

[0425] The network device sends similarity request information to the terminal device;

[0426] receiving feedback configuration information for channel state information reporting estimated by the terminal device according to the similarity requirement information;

[0427] The network device generates reporting configuration information according to the feedback configuration information fed back by the terminal device;

[0428] Sending the reporting configuration information to the terminal device; and

[0429] Receive first channel state information fed back by the terminal device.

[0430] 65. A terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the channel state information feedback method as described in any one of Notes 1 to 61.

[0431] 66. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the channel state information feedback method as described in any one of Notes 62 to 64.

Claims

1. A channel state information feedback device, comprising: a receiving unit configured to receive a reported configuration from a network device, wherein the reported configuration includes codebook indication information and feedback configuration information; a processing unit configured to measure a channel state information reference signal to obtain channel state information; and process the channel state information according to the codebook indication information and the feedback configuration information to obtain first channel state information; as well as A sending unit is configured to feed back the first channel state information to the network device.

2. The device according to claim 1, wherein The feedback configuration information includes at least one of the following information: DFT basis vector number information, amplitude bit number information, phase bit number information, time domain basis vector information, Doppler basis vector information, delay related information, or channel state information feedback bit number related information.

3. The device according to claim 1, wherein The feedback configuration information is used to indicate the quantization method of the channel state information of the terminal device. Processing the channel state information includes: quantizing the channel state information and generating feedback bit information based on the feedback configuration information according to a rule predefined in the codebook corresponding to the codebook indication information.

4. The device according to claim 1, wherein The larger the number of bits corresponding to the feedback configuration information is, the higher the quantization accuracy of the first channel state information is.

5. The device according to claim 1, wherein The feedback configuration information is represented by a configuration ID; A configuration ID corresponds to a combination of at least one of the following information: information on the number of DFT basis vectors, information on the number of amplitude bits, information on the number of phase bits, information on time domain basis vectors, information on Doppler basis vectors, information on delay-related information, or information on the number of channel state information feedback bits; and / or, the configuration ID further corresponds to an indication of the number of multiple antenna layers; Different configuration IDs correspond to different combinations of codebook parameter bit numbers.

6. The device according to claim 1, wherein One total number of feedback bits corresponds to multiple different codebook parameter bit configurations, and / or multiple total numbers of feedback bits correspond to multiple different codebook parameter bit configurations; Different feedback configuration information corresponds to different total number of feedback bits and / or quantization precisions, or different feedback configuration information corresponds to different total number of feedback bits and different codebook parameters, or different feedback configuration information corresponds to the same total number of feedback bits and different codebook parameters.

7. The device according to claim 1, wherein The feedback of the first channel state information is aperiodic reporting, and / or, The reporting configuration also instructs the terminal device to report the first channel state information based on a rank equal to 1.

8. The device according to claim 1, wherein The network device configures, for the terminal device, channel state information feedback with a total number of feedback bits greater than a normal value through the feedback configuration information, and / or The terminal device combines various feedback parameters of the feedback configuration information and / or selects one or more feedback parameters.

9. A channel state information feedback device, comprising: A receiving unit, configured to receive a first reporting configuration from a network device, wherein the first reporting configuration includes feedback configuration information and similarity indication information for configuring similarity of channel state information reported by a terminal device; a processing unit configured to measure a channel state information reference signal to obtain channel state information; Processing the channel state information according to the feedback configuration information to obtain first channel state information, and calculating similarity information based on the channel state information corresponding to the feedback configuration information; as well as A sending unit is configured to feed back the first channel state information and / or the similarity information to the network device.

10. The device according to claim 9, wherein The similarity information is calculated based on the channel state information corresponding to the feedback configuration information and the channel state information estimated via the channel state information reference signal.

11. The device according to claim 10, wherein The similarity information is represented by a plurality of bits; The similarity is expressed based on a predefined rule, or is expressed based on a configuration of a radio resource control signaling.

12. The device according to claim 9, wherein The receiving unit further receives a second reporting configuration from the network device; The processing unit generates second channel state information based on the second reporting configuration; and The sending unit feeds back the second channel state information to the network device.

13. The device according to claim 12, wherein The second channel state information is generated by a channel state information generation method based on AI / ML, or the second channel state information is generated by a channel state information generation method based on AI / ML codebook, or the second channel state information is generated by a channel state information generation method with low feedback information amount.

14. The device according to claim 12, wherein The first channel state information is channel feedback information of an uplink high load, and the second channel state information is channel feedback information of an uplink low load.

15. The device according to claim 9, wherein The sending unit feeds back the first channel state information and / or the similarity information to the network device semi-continuously or periodically for multiple times.

16. The device according to claim 9, wherein The receiving unit receives a group of CSI-RSs including a plurality of channel state information reference signals configured by the network device; and The sending unit feeds back the first channel state information and / or the similarity information for the group of CSI-RSs.

17. The device according to claim 16, wherein The interval between two adjacent CSI-RSs in the group of CSI-RSs is smaller than a normal CSI-RS period.

18. The device according to claim 9, wherein The receiving unit receives a plurality of channel state information reference signals configured by the network device; as well as The sending unit feeds back the first channel state information and / or the similarity information for the multiple channel state information reference signals.

19. The device according to claim 18, wherein The feedback is completed within one feedback time unit; The feedback time unit includes at least one of the following: one symbol, one time slot, multiple time slots, multiple symbols, and one subframe; The feedback time unit is configured through radio resource control signaling.

20. A channel state information feedback device, comprising: a receiving unit configured to receive similarity requirement information from a network device; a processing unit configured to estimate feedback configuration information for channel state information reporting based on the similarity requirement information; as well as a sending unit configured to feed back the feedback configuration information to the network device; The receiving unit further receives reporting configuration information of the first channel state information sent by the network device, wherein the reporting configuration information is generated by the network device according to feedback configuration information fed back by the terminal device; The processing unit measures a channel state information reference signal to obtain channel state information; processes the channel state information according to the reporting configuration information and / or the feedback configuration information to obtain first channel state information; as well as The sending unit feeds back the first channel state information to the network device.

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