CSI feedback configuration methods, devices, equipment, and media

Abstract

This invention discloses a CSI feedback configuration method, apparatus, device, and medium, relating to the field of communication technology, to address the problem of poor matching between CSI feedback methods and real-time channel status. The method includes: determining an error index for each of the at least two CSI feedback methods based on the error between a first CSI and a second CSI corresponding to each of the at least two CSI feedback methods; determining first error information based on the error indices of the at least two CSI feedback methods; sending the first error information to a network-side device; and receiving first status indication information sent by the network-side device. Embodiments of this invention can improve the accuracy of CSI feedback based on CSI feedback methods.

Description

Technical Field

[0001] This invention relates to the field of wireless technology, and in particular to a CSI feedback configuration method, apparatus, device, and medium. Background Technology

[0002] The process of a terminal device reporting downlink channel quality to a base station typically involves the base station sending a Channel State Information Reference Signal (CSI-RS) to the terminal device. Based on the CSI-RS, the terminal device measures Channel State Information (CSI) using the CSI feedback method provided by the base station, and then feeds back the estimated CSI to the base station via the uplink channel. The accuracy of CSI feedback varies depending on the channel conditions and the CSI feedback method used.

[0003] In existing technologies, base stations typically configure only one CSI feedback method and send it to the terminal device. Therefore, it is difficult for base stations to select a suitable CSI feedback method based on the real-time channel state, resulting in a poor match between the CSI feedback method and the real-time channel state. Summary of the Invention

[0004] This invention provides a CSI feedback configuration method, apparatus, device, and medium to solve the problem that base stations have difficulty selecting a suitable CSI feedback method based on real-time channel conditions, resulting in poor matching between the CSI feedback method and the channel conditions.

[0005] In a first aspect, embodiments of the present invention provide a CSI feedback configuration method, applied to a terminal device, including:

[0006] Based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods, an error index for each of the at least two CSI feedback methods is determined; the second CSI is the CSI obtained by the terminal device recovering the bitstream through the CSI feedback method, and the bitstream is obtained by the terminal device converting the first CSI through the CSI feedback method;

[0007] The first error information is determined based on the error indices of the at least two CSI feedback methods;

[0008] The first error information is sent to the network-side device. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device.

[0009] The system receives first status indication information sent by the network-side device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0010] Optionally, before determining the error index of each of the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the method further includes:

[0011] Receive the at least two CSI feedback methods and initial status indication information sent by the network-side device;

[0012] The initial state indication information indicates that the state of any one of the at least two CSI feedback methods is active, and the state of the other CSI feedback methods is deactivated.

[0013] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0014] Optionally, the first error information includes at least one of the following:

[0015] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0016] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0017] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0018] Optionally, determining the error index for each of the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods includes:

[0019] If the time interval between the moment of receiving the initial state indication information or the moment of the last determination of the error index of the at least two CSI feedback methods is equal to a preset time interval, the error index of each CSI feedback method among the at least two CSI feedback methods is determined based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods.

[0020] Optionally, after receiving the first status indication information sent by the network-side device, the method further includes:

[0021] The CSI is reported to the network-side device based on the first CSI feedback method.

[0022] Secondly, embodiments of the present invention provide a CSI feedback configuration method, applied to network-side devices, including:

[0023] Based on the first error information sent by the terminal device, a first CSI feedback method is determined and activated from at least two CSI feedback methods. The first error information is determined based on the error indices of the at least two CSI feedback methods. The error indices of the CSI feedback methods are determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method. The second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bitstream. The bitstream is obtained by the terminal device through the CSI feedback method to convert the first CSI.

[0024] Send a first status indication message to the terminal device. The first status indication message indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0025] Optionally, before determining the first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device, the method further includes:

[0026] Configure at least two CSI feedback methods;

[0027] Set the state of any one of the at least two CSI feedback methods to the active state, and set the state of the other CSI feedback methods to the deactivated state, thereby obtaining initial state indication information;

[0028] Send the at least two CSI feedback methods and initial status indication information to the terminal device.

[0029] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0030] Optionally, the first error information includes at least one of the following:

[0031] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0032] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0033] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0034] Optionally, determining and activating the first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device includes:

[0035] Based on the first error information sent by the terminal device, a first CSI feedback method is determined from at least two CSI feedback methods. If the first CSI feedback method is different from the CSI feedback method that was active when the first error information was received, the state of the first CSI feedback method is switched to the active state, and the state of the CSI feedback methods other than the first CSI feedback method among the at least two CSI feedback methods is switched to the deactivated state to obtain the first state indication information.

[0036] Optionally, the step of switching the state of the first CSI feedback mode to the active state, and switching the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, to obtain the first state indication information, includes:

[0037] The Media Access Control-Control Unit (MAC-CE) layer of the network-side device switches the state of the first CSI feedback mode to the active state, and switches the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, thereby obtaining the first state indication information.

[0038] Optionally, determining and activating the first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device includes:

[0039] Receive first error information sent by at least one terminal device, determine and activate the first CSI feedback mode corresponding to each of the at least one terminal device from at least two CSI feedback modes.

[0040] Optionally, after sending the first status indication information to the terminal device, the method further includes:

[0041] Receive the CSI reported by the terminal device based on the first CSI feedback method.

[0042] Thirdly, embodiments of the present invention provide a CSI feedback mode configuration device, wherein the CSI feedback mode configuration device is a terminal device, comprising:

[0043] The first determining module is used to determine the error index of each of the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods; the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is obtained by the terminal device through the CSI feedback method to convert the first CSI.

[0044] The second determining module is used to determine the first error information based on the error indicators of the at least two CSI feedback methods;

[0045] The first sending module is used to send the first error information to the network-side device. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device.

[0046] The first receiving module is configured to receive first status indication information sent by the network-side device, wherein the first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0047] Fourthly, embodiments of the present invention provide a CSI feedback mode configuration device, wherein the CSI feedback mode configuration device is a network-side device, comprising:

[0048] A processing module is configured to determine and activate a first CSI feedback method from at least two CSI feedback methods based on first error information sent by a terminal device, wherein the first error information is determined based on the error indices of the at least two CSI feedback methods, the error indices of the CSI feedback methods are determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bitstream, and the bitstream is the first CSI conversion obtained by the terminal device through the CSI feedback method.

[0049] The second sending module is used to send first status indication information to the terminal device. The first status indication information indicates that the state of the first CSI feedback method is active, and indicates that the state of the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, is deactivated.

[0050] Fifthly, embodiments of the present invention provide a CSI feedback configuration device, wherein the CSI feedback configuration device is a terminal device, including: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor;

[0051] The processor is configured to read a program from memory to implement the steps described in the first aspect of the method.

[0052] In a sixth aspect, embodiments of the present invention provide a CSI feedback configuration device, which is a network-side device, including: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor;

[0053] The processor is configured to read a program from memory to implement the steps described in the second aspect of the method.

[0054] In a seventh aspect, embodiments of the present invention provide a readable storage medium for storing a program, which, when executed by a processor, implements the steps of the method described in the first or second aspect.

[0055] In this embodiment, the first error information is determined based on the error indices of at least two CSI feedback methods. The error indices of the CSI feedback methods are the error indices between the first CSI and the second CSI corresponding to the CSI feedback method. The first CSI characterizes channel state information, and the second CSI is obtained by converting the first CSI into a bitstream using the CSI feedback method and then converting the bitstream again using the CSI feedback method. Since the determination of the first error information is related to the channel state, the first CSI feedback method determined by the network-side device from at least two CSI feedback methods based on the first error information is more consistent with the channel state. This results in a higher degree of matching between the CSI feedback method used by the terminal device for reporting CSI and the channel state, leading to better CSI reporting quality and higher accuracy. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a block diagram of a wireless communication system applicable to an embodiment of the present invention;

[0058] Figure 2 This is one of the flowcharts of the CSI feedback configuration method provided in the embodiments of the present invention;

[0059] Figure 3 This is the second flowchart of the CSI feedback configuration method provided in this embodiment of the invention;

[0060] Figure 4 This is the third flowchart of the CSI feedback configuration method provided in this embodiment of the invention;

[0061] Figure 5 This is one of the structural diagrams of the CSI feedback method configuration device provided in the embodiments of the present invention;

[0062] Figure 6 This is the second structural diagram of the CSI feedback configuration device provided in this embodiment of the invention;

[0063] Figure 7 This is one of the structural diagrams of the CSI feedback method configuration device provided in the embodiments of the present invention;

[0064] Figure 8 This is the second structural diagram of the CSI feedback configuration device provided in this embodiment of the invention. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0066] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0067] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th Generation (6G) communication systems.

[0068] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal device 11 and a network-side device 12. The terminal device 11 can also be referred to as a first terminal or a user terminal (UE). The terminal device 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle user equipment (VUE), pedestrian user equipment (PUE), etc. Wearable devices include wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of the terminal device 11. Network-side equipment 12 can be a base station or core network equipment. The base station can be referred to as a Node B, Evolved Node B, access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), B node, Evolved Node B (eNB), home B node, home evolved B node, Wireless Local Area Network (WLAN) access point, WiFi node, Transmitting Receiving Point (TRP), or any other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in this embodiment, only a base station in an NR system is used as an example, but the specific type of base station is not limited. Core network equipment can be referred to as a Location Management Function (LMF), Enhanced Serving Mobile Location Center (E-SMLC), location server, or any other suitable term in the field.

[0069] See Figure 2 , Figure 2This is one of the flowcharts of the CSI feedback configuration method provided in the embodiments of the present invention, such as... Figure 2 As shown, the CSI feedback configuration method provided in this embodiment is applied to a terminal device, and the method specifically includes the following steps:

[0070] Step 201: Based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods, determine the error index of each CSI feedback method among the at least two CSI feedback methods; the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is obtained by the terminal device through the CSI feedback method to convert the first CSI conversion.

[0071] Step 202: Determine the first error information based on the error indices of the at least two CSI feedback methods.

[0072] Step 203: Send the first error information to the network-side device. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device.

[0073] Step 204: Receive first status indication information sent by the network-side device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0074] It should be noted that the first error information is calculated by the terminal device and reported to the network-side device. Specifically, the terminal device determines the error index of the CSI feedback method based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods, and then determines the first error information.

[0075] To facilitate understanding, an example will be provided below. For instance, there are two CSI feedback methods: CSI feedback method A and CSI feedback method B. The error between the first CSI and the second CSI corresponding to CSI feedback method A is used as the error index for CSI feedback method A. The error between the first CSI and the second CSI corresponding to CSI feedback method B is used as the error index for CSI feedback method B. The terminal device determines the first error information based on the error indices of CSI feedback method A and CSI feedback method B.

[0076] The error index for the CSI feedback method is the error between the first CSI and the corresponding second CSI. The first CSI is the information obtained by the terminal device through measurement and estimation of the channel state; it is information that can characterize the channel state of the terminal device, i.e., it can characterize the channel state. For example, the terminal device can measure and estimate the current channel state to obtain the first CSI, which can characterize the current channel state. The second CSI is the CSI obtained by converting the first CSI into a bitstream and then converting the bitstream using the CSI feedback method.

[0077] To facilitate understanding, the following explanation uses the determination process of the error index for CSI feedback method A as an example to illustrate the relationship between the second CSI and the first CSI. The terminal device's calculation of the error index for CSI feedback method A is equivalent to calculating the error between the second CSI and the first CSI corresponding to CSI feedback method A. Specifically, the terminal device first performs CSI measurement estimation to obtain the first CSI. The terminal device then calculates the bitstream corresponding to the first CSI based on CSI feedback method A. Since CSI is typically a floating-point matrix, there is an error in the process of converting the first CSI into a bitstream based on CSI feedback method A. The terminal device then converts the calculated bitstream based on CSI feedback method A, restoring the bitstream to the form of a CSI matrix. The CSI obtained by restoring the bitstream using CSI feedback method A is the second CSI corresponding to CSI feedback method A. Since CSI is typically a floating-point matrix, there is also an error in the process of restoring the bitstream to the second CSI using CSI feedback method A. Calculating the error between the second CSI and the first CSI yields the error index for CSI feedback method A.

[0078] In practical implementation, the terminal device performs the above operation for each of the at least two CSI feedback methods to obtain the error index of each CSI feedback method, and then determines the first error information based on the error index of at least two CSI feedback methods.

[0079] It should be understood that the specific type of CSI feedback method in this embodiment is not limited, and the CSI feedback method in this embodiment can be any CSI feedback method in the related art. Optionally, in some embodiments, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and Artificial Intelligence (AI).

[0080] In some embodiments, R16 Type II is also referred to as eType II, eType II codebook, or R16 Type II codebook. In some embodiments, Type I may also be referred to as Type I codebook. In other embodiments, Type II may also be referred to as Type II codebook. The R16 Type II codebook, Type I codebook, and Type II codebook are codebooks specified in the relevant protocols of the Third Generation Partnership Projects (3GPP).

[0081] In some embodiments, when the at least two CSI feedback methods include AI, the terminal device can convert the first CSI into a bitstream based on the structure and parameters of the AI ​​neural network configured by the AI ​​feedback method, and the terminal device can report the converted bitstream when reporting CSI.

[0082] In practical implementation, the error index of the CSI feedback method can be used to reflect the feedback performance of the CSI feedback method. In other words, the error index of the CSI feedback method can characterize the performance of the terminal device in performing CSI feedback based on this method under the current channel conditions. Therefore, it can be considered that the smaller the error index of the CSI feedback method, the better the feedback effect of the terminal device based on this CSI feedback method under the current channel conditions.

[0083] It should be understood that the fact that the terminal device calculates the error index of each of the at least two CSI feedback methods indicates that the terminal device has at least two CSI feedback methods pre-stored. Therefore, the terminal device can calculate the error index of each CSI feedback method based on the at least two pre-stored CSI feedback methods.

[0084] Optionally, in some embodiments, before step 201, the method further includes:

[0085] Receive the at least two CSI feedback methods and initial status indication information sent by the network-side device;

[0086] The initial state indication information indicates that the state of any one of the at least two CSI feedback methods is active, and the state of the other CSI feedback methods is deactivated.

[0087] The network-side device configures at least two CSI feedback methods and sends these two configured CSI feedback methods to the terminal device. The terminal device then saves the received CSI feedback methods. Specifically, in some embodiments, the network-side device's Radio Resource Control (RRC) layer configures at least two CSI feedback methods. When configuring at least two CSI feedback methods, the network-side device can configure them according to the functions supported by the terminal device.

[0088] In some embodiments, when a network-side device configures at least two CSI feedback methods and sends these at least two CSI feedback methods to a terminal device, the network-side device can, according to preset conditions or based on the supported functions of the terminal device, set the state of any one of the at least two CSI feedback methods to an active state, and set the states of the other CSI feedback methods to a deactivated state, thus obtaining initial state indication information. Before reporting the first error information, the terminal device performs CSI reporting based on the CSI feedback method that is in the active state.

[0089] In other embodiments, when the network-side device configures at least two CSI feedback methods and sends the configured at least two CSI feedback methods to the terminal device, it can instruct the terminal device to report the first error information at the current moment, thereby determining the first CSI feedback method from the at least two CSI feedback methods based on the first error information sent by the terminal device.

[0090] It should be understood that the specific form of the error metric is not limited herein. For example, in some embodiments, the error metric includes cosine similarity. In other embodiments, the error metric includes normalized mean squared error (NMSE). In still other embodiments, the error metric may include mean absolute error (MAE), root mean square error (RMSE), and normalized mean squared error (NMSE), etc.

[0091] Furthermore, in other embodiments, the error index can also be obtained by processing MAE, RMSE, and NMSE accordingly. For example, the error index can be the average, maximum, or root mean square deviation of MAE, RMSE, and NMSE.

[0092] The terminal device sends first error information to the network-side device. The network-side device receives the first error information sent by the terminal device, and determines and activates a first CSI feedback method from at least two CSI feedback methods based on the first error information.

[0093] The specific method by which the network-side device determines the first CSI feedback method from at least two CSI feedback methods based on the first error information is not limited here. For example, in some embodiments, the network-side device may determine the CSI feedback method with the smallest error index among at least two CSI feedback methods as the first CSI feedback method based on the first error information.

[0094] After determining the first CSI feedback method, the network-side device sets the first CSI feedback method to an active state, obtaining first status indication information to indicate the status of the at least two CSI feedback methods. The network-side device sends the first status indication information to the terminal device. The terminal device receives the first status indication information sent by the network-side device.

[0095] Optionally, in some embodiments, after step 204, the method further includes:

[0096] The CSI is reported to the network-side device based on the first CSI feedback method.

[0097] The first state indication information indicates that the first CSI feedback method is in an active state. An active CSI feedback method can be understood as the terminal device periodically reporting CSI based on this method. Therefore, in this embodiment, after receiving the first state indication information, the terminal device will periodically report CSI to the network-side device based on the first CSI feedback method. The network-side device receives the CSI reported by the terminal device based on the first CSI feedback method and determines and sends out the precoding matrix based on the CSI reported by the terminal device.

[0098] In some embodiments, the process of a terminal device reporting CSI to a network-side device based on a first CSI feedback method is as follows: the terminal device performs CSI measurement estimation to obtain a first CSI, and converts the first CSI into a bit stream based on the first CSI feedback method. The terminal device reports the bit stream to the network-side device, and the network-side device uses its own pre-stored first CSI feedback method to restore the bit stream into a second CSI.

[0099] It should be understood that the CSI reporting by the terminal device based on the active-state CSI feedback method is a periodic behavior. That is, the terminal device periodically reports CSI based on the active-state CSI feedback method, and the terminal device receives the CSIs periodically reported by the terminal device based on the CSIs reported by the terminal device, and selects a precoding / transmission scheme based on the CSIs reported by the terminal device.

[0100] In some embodiments, the state of a CSI feedback method includes an active state and a deactivation state. A first state indication information is used to indicate that the first CSI feedback method is in the active state, and that the other CSI feedback methods (excluding the first CSI feedback method) are in the deactivation state. In a specific implementation, only one of the at least two CSI feedback methods is in the active state.

[0101] In this embodiment, since the network-side device has pre-configured at least two CSI feedback methods and distributed them to the terminal device, and the terminal device has pre-stored at least two CSI feedback methods, when it is necessary to switch the CSI feedback method used by the terminal device for CSI feedback, the network-side device does not need to configure the CSI feedback method; it can switch the CSI feedback method simply by changing the state of the CSI feedback method. This improves the flexibility and timeliness of switching the CSI feedback method used by the terminal device for CSI feedback.

[0102] In this embodiment, the first error information is determined based on the error indices of at least two CSI feedback methods. The error indices of the CSI feedback methods are the error between the first CSI and the second CSI corresponding to the CSI feedback method. The first CSI characterizes channel state information, and the second CSI is obtained by converting the first CSI into a bitstream using the CSI feedback method and then converting the bitstream again using the CSI feedback method. Since the determination of the first error information is related to the channel state, the first CSI feedback method determined by the network-side device from at least two CSI feedback methods based on the first error information is more consistent with the channel state. This results in a higher degree of matching between the CSI feedback method used by the terminal device for reporting CSI and the channel state, leading to better CSI reporting quality and higher accuracy.

[0103] The specific method by which the first error information is determined based on error indices from at least two CSI feedback methods varies. The content of the first error information also differs depending on the determination method. Optionally, in some embodiments, the first error information includes at least one of the following:

[0104] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0105] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0106] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0107] In the first scenario, the first error information includes a set of error indicators, which comprises the error indicators corresponding to each of the at least two CSI feedback methods. Therefore, in this scenario, the terminal device calculates the error indicators corresponding to each of the at least two CSI feedback methods, and then sends the error indicators corresponding to all CSI feedback methods as the first error information to the network-side device.

[0108] In the second scenario, the first error information includes a target ranking, which is the ranking result of the at least two CSI feedback methods based on the error index. In this case, the terminal device calculates the error index corresponding to each of the at least two CSI feedback methods, then obtains the ranking result of all CSI feedback methods based on the error index according to a preset rule, and only sends the obtained ranking result as the first error information to the network-side device. This reduces the overhead of the terminal device reporting the first error information.

[0109] It should be understood that the preset rules used for sorting are predetermined. For example, in some embodiments, the preset rules may be based on error indices from largest to smallest. In other embodiments, the preset rules may be based on error indices from smallest to largest.

[0110] In practical implementation, both the network-side device and the terminal device know the number of CSI feedback methods, and all possible sorting results can be obtained based on the number of CSI feedback methods. To further reduce the overhead of the terminal device reporting the first error information, the network-side device and the terminal device can predetermine the index corresponding to each possible sorting result, and the first error information finally sent can be the index corresponding to the target sorting.

[0111] In the third scenario, the first error information includes a target index, which is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods. In this case, the terminal device calculates the error index corresponding to each of the at least two CSI feedback methods, then determines the CSI feedback method with the smallest error index, and sends the CSI feedback method index of that CSI feedback method as the first error information to the network-side device. This further reduces the overhead of the terminal device reporting the first error information.

[0112] It should be understood that, in some embodiments, the first error information may also include the CSI feedback method indices corresponding to the top X CSI feedback methods sorted by error index from smallest to largest among at least two CSI feedback methods, where X is a positive integer. In specific implementations, the value of X can be adjusted and set according to the actual situation.

[0113] To facilitate understanding, examples will be provided below. For instance, in some embodiments, the network-side device configures and sends three CSI feedback methods to the terminal device: CSI feedback method A, CSI feedback method B, and CSI feedback method C. The configurations for these three CSI feedback methods are pre-stored on the terminal device. The terminal device calculates the error indices for each of the three CSI feedback methods, obtaining the error A corresponding to CSI feedback method A, the error B corresponding to CSI feedback method B, and the error C corresponding to CSI feedback method C.

[0114] In this embodiment, it is assumed that error A is greater than both error B and error C, and error C is greater than error B. Therefore, assuming the preset rule is to arrange the targets from largest to smallest, the target order should be "CSI feedback method A, CSI feedback method C, CSI feedback method B", and the target index is the CSI feedback method index corresponding to CSI feedback method B.

[0115] When the first error information includes an error index set, the first error information is "Error A, Error C, Error B". When the first error information includes target sorting, the first error information is "CSI Feedback Method A, CSI Feedback Method C, CSI Feedback Method B", or the index corresponding to "CSI Feedback Method A, CSI Feedback Method C, CSI Feedback Method B". When the first error information includes a target index, the first error information is the CSI feedback method index corresponding to CSI feedback method B.

[0116] In this embodiment, the first error information includes at least one of the following: an error index set, a target ranking, and a target index. When the first error information includes an error index set, the network-side device can obtain more detailed error indicators for the CSI feedback method, providing more basis for the network-side device to determine the first CSI feedback method. When the first error information includes a target ranking and a target index, the overhead of the terminal device reporting the first error information can be reduced, saving communication resources.

[0117] Optionally, in some embodiments, step 201 includes:

[0118] If the time interval between the moment of receiving the initial state indication information or the moment of the last determination of the error index of the at least two CSI feedback methods is equal to a preset time interval, the error index of each CSI feedback method among the at least two CSI feedback methods is determined based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods.

[0119] In practical implementation, the terminal device can periodically send error information to the network-side device. The network-side device receives the error information and determines the active CSI feedback mode based on the current error information. Therefore, the active CSI feedback mode may switch periodically, but this switching does not affect the periodic reporting of CSI; the terminal device always reports CSI according to the currently active CSI feedback mode. In practical implementation, the CSI reporting cycle and the CSI feedback mode switching cycle can be the same or different.

[0120] In this embodiment, the specific length of the preset time interval is not limited. In the embodiment where the terminal device periodically sends error information to the network-side device, the preset time interval can be the period during which the terminal device sends error information to the network-side device. Therefore, in this embodiment, the preset time interval can also be called the error information reporting period.

[0121] For ease of description, in the following embodiments, the moment when step 201 is executed is referred to as the first moment, and the moment when the error index of the at least two CSI feedback methods was last determined is referred to as the second moment. The second moment is located before the first moment, and the time interval between the second moment and the first moment is equal to a preset time interval.

[0122] In this embodiment, assuming that the error information reporting period configured by the network-side device is T, the second time can be understood as n*T, and the first time can be understood as (n+1)*T, where n is a positive integer.

[0123] The first error information is determined based on the error indices of the at least two CSI feedback methods at a first time step. The second error information is determined based on the error indices of the at least two CSI feedback methods at a second time step.

[0124] The terminal device sends the second error information to the network-side device. The second error information is used to determine and activate a second CSI feedback method from the at least two CSI feedback methods. The terminal device receives second status indication information sent by the network-side device. The second status indication information is used to indicate that the state of the second CSI feedback method is the active state, and to indicate that the state of the other CSI feedback methods among the at least two CSI feedback methods is the deactivated state.

[0125] It should be understood that the specific method by which the terminal device determines the second error information based on the error index at the second time based on the at least two CSI feedback methods can be found in the foregoing content, and will not be repeated here to avoid repetition.

[0126] It should be noted that, in some embodiments, the second error information may include at least one of the following: an error index set, a target ranking, and a target index. The content of the second error information may be the same as or different from that of the first error information.

[0127] In this embodiment, by setting a preset time interval between the first time and the second time, the terminal device can calculate the error index corresponding to at least two CSI feedback methods at the first time after reporting CSI a certain number of times based on the second CSI feedback method, and report it to the network-side device. This allows the network-side device to re-determine the CSI feedback method with the best feedback performance under the channel state at the first time, further improving the matching degree between the CSI feedback method used by the terminal device to report CSI and the real-time channel state, and improving the quality of CSI reporting.

[0128] In some embodiments, the network-side device configures an error information reporting period and sends the configured error information reporting period to the terminal device. The terminal device can periodically calculate the error index of the CSI feedback method and periodically report the error information. That is, the terminal device reports the error information according to the error information reporting period. Specifically, in some embodiments, the Radio Resource Control (RRC) layer of the network-side device configures the error information reporting period.

[0129] It should be noted that, in practical implementation, the network-side device can instruct the terminal device to periodically report CSI based on the active-state CSI feedback method, and also instruct the terminal device to periodically report error information. The period for the terminal device to report CSI and the period for reporting error information can be the same or different. The periodic reporting of CSI based on the active-state CSI feedback method and the periodic reporting of error information by the terminal device can be considered two independent processes.

[0130] It should be understood that channel conditions differ at different times, therefore the error metrics for each CSI feedback method will also differ at different times. Take AI and R16 Type II as examples. Under relatively fixed environments and configurations, the performance of terminal devices using AI-based CSI feedback is often better than that using R16 Type II. However, when the environment changes, such as changes in transmit / receive antenna configuration or other environmental factors, the feedback performance of AI-based CSI feedback will be significantly affected. Therefore, the error metrics for CSI feedback methods differ under different channel conditions.

[0131] Therefore, the first CSI feedback method may be the same or different. The network-side device determines whether to switch to the second CSI feedback method based on the first CSI feedback method. Switching to the second CSI feedback method can also be understood as switching the active CSI feedback method from the second CSI feedback method back to the first CSI feedback method.

[0132] In this embodiment, the first error information is determined based on the error indices of at least two CSI feedback methods at a first time; the second error information is determined based on the error indices of at least two CSI feedback methods at a second time. Through this configuration, the network-side device can obtain error information under different channel conditions, and thus determine whether to switch the active CSI feedback method based on the channel condition. This makes the selection of the CSI feedback method used by the terminal device for periodic CSI reporting more consistent with the current channel condition, improving the accuracy of CSI reporting.

[0133] Optionally, in some embodiments, determining and activating the first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device includes:

[0134] Based on the first error information sent by the terminal device, a first CSI feedback method is determined from at least two CSI feedback methods. If the first CSI feedback method is different from the CSI feedback method that was active when the first error information was received, the state of the first CSI feedback method is switched to the active state, and the state of the CSI feedback methods other than the first CSI feedback method among the at least two CSI feedback methods is switched to the deactivated state to obtain the first state indication information.

[0135] In some embodiments, the network-side device determines whether to switch to a second CSI feedback method based on the first CSI feedback method. If the first CSI feedback method is in an inactive state, the network-side device switches the state of the first CSI feedback method to the active state, and switches the states of all CSI feedback methods other than the first CSI feedback method to an inactive state, thereby obtaining first state indication information. The network-side device sends the first state indication information to the terminal device.

[0136] When the first CSI feedback method and the second CSI feedback method are the same, and the first CSI feedback method is active at the first moment, it can be assumed that the terminal device continuously reports CSI using the first CSI feedback method between the first and second moments. Therefore, it is not necessary to send a first status indication message to the terminal device to enable it to continue reporting CSI using the first CSI feedback method. Of course, in specific implementations, even when the second CSI feedback method and the first CSI feedback method are the same, a first status indication message can also be sent to the terminal device.

[0137] It should be understood that when the first CSI feedback method and the second CSI feedback method are different, the state of the first CSI feedback method is inactive at the first moment. In order to switch the terminal device to report CSI according to the first CSI feedback method, the network side device switches the state of the first CSI feedback method to active, and switches the state of at least two CSI feedback methods other than the first CSI feedback method to inactive, and obtains the first state indication information.

[0138] Optionally, in some embodiments, when the first CSI feedback mode is different from the CSI feedback mode that is in an active state when the first error information is received, the Medium Access Control-Control Element (MAC-CE) layer of the network-side device switches the state of the first CSI feedback mode to the active state, and switches the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, thereby obtaining the first state indication information.

[0139] In this embodiment, the network-side device switches the CSI feedback mode state through the MAC-CE layer. Since the MAC-CE layer is closer to the physical layer of the network-side device than the RRC layer, switching the CSI feedback mode state through the MAC-CE layer can improve the timeliness of the CSI feedback mode state switching.

[0140] Optionally, in some embodiments, the network-side device determines and activates a first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device, including:

[0141] The network-side device receives first error information sent by at least one terminal device, and determines and activates the first CSI feedback method corresponding to each of the at least two terminal devices from at least two CSI feedback methods. The specific content of the first error information sent by different terminal devices may be the same or different.

[0142] It should be understood that, in specific implementations, one network-side device can correspond to at least one terminal device. Therefore, the network-side device receives first error information sent by at least one terminal device. Based on the received first error information, the network-side device determines and activates the first CSI feedback method corresponding to each of the at least one terminal device from at least two CSI feedback methods.

[0143] In practice, when determining the first CSI feedback method, the network-side equipment can also consider factors such as other users in the same cell and system resources. Different terminal devices can use the same or different first CSI feedback methods.

[0144] It should be noted that when there is more than one terminal device, the network-side device can configure at least two CSI feedback methods for different terminal devices that are the same or different. If the network-side device configures at least two different CSI feedback methods for different terminal devices, the network-side device can only determine the first CSI feedback method from the at least two CSI feedback methods pre-stored by that terminal device.

[0145] It should be noted that, in this embodiment, the network-side device corresponds to at least one terminal device. The time at which each terminal device reports the first error information may be the same or different. When the time at which each terminal device reports the first error information is different, the network-side device can only determine and activate the first CSI feedback mode corresponding to the terminal device based on the first error information reported by the terminal device.

[0146] In some embodiments, the network-side device is configured to provide the same error information reporting period for multiple terminal devices. In a specific implementation, when there are multiple terminal devices, the network-side device can divide the multiple terminal devices into different terminal device groups. Each terminal device group includes at least one terminal device, and the network-side device can determine and activate the same first CSI feedback mode for terminal devices within the same terminal device group.

[0147] For example, in some embodiments, the terminal device group includes only one terminal device, and the network side device determines and activates the first CSI feedback method corresponding to the terminal device from at least two CSI feedback methods based on the first error information reported by the terminal device.

[0148] In other embodiments, the terminal device group includes multiple terminal devices. The network side device receives first error information reported by multiple terminal devices and determines and activates the first CSI feedback mode corresponding to the terminal devices in the terminal device group based on the multiple first error information.

[0149] In specific implementation, the method by which the network-side device determines the first CSI feedback method corresponding to the terminal device within the terminal device group based on multiple first error information is not limited here. For example, the network-side device first determines the CSI feedback method with the smallest error index for each terminal device, and then determines the CSI feedback method with the largest number of corresponding terminals as the first CSI feedback method corresponding to the terminal device within the terminal device group.

[0150] The first error information of each terminal device is determined based on the error indicators corresponding to at least two CSI feedback methods at the first time, and the second error information of each terminal device is determined based on the error indicators corresponding to at least two CSI feedback methods at the second time. The network-side device receives the second error information sent by at least one terminal device. The specific process for determining the second CSI feedback method corresponding to each terminal device from at least two CSI feedback methods can be found in the above content, and will not be limited here to avoid repetition.

[0151] In this embodiment, the network-side device receives first error information sent by at least one terminal device, and determines and activates the first CSI feedback method corresponding to each of the at least two terminal devices from at least two CSI feedback methods. Through this setting, the network-side device, while determining the first CSI feedback method corresponding to each terminal device, also considers other users in the same cell, thereby making the determination of the first CSI feedback method more reasonable and the allocation of resources more efficient.

[0152] See Figure 3 , Figure 3 This is the second flowchart of the CSI feedback configuration method provided in this embodiment of the invention, as shown below. Figure 3 As shown, the CSI feedback configuration method provided in this embodiment is applied to network-side devices, and the method specifically includes the following steps:

[0153] Step 301: Based on the first error information sent by the terminal device, determine and activate a first CSI feedback method from at least two CSI feedback methods, wherein the first error information is determined based on the error index of the at least two CSI feedback methods, the error index of the CSI feedback method is determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is the first CSI conversion obtained by the terminal device through the CSI feedback method;

[0154] Step 302: Send first status indication information to the terminal device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0155] Optionally, before step 301, the method further includes:

[0156] Configure at least two CSI feedback methods;

[0157] Set the state of any one of the at least two CSI feedback methods to the active state, and set the state of the other CSI feedback methods to the deactivated state, thereby obtaining initial state indication information;

[0158] Send the at least two CSI feedback methods and initial status indication information to the terminal device.

[0159] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0160] Optionally, the first error information includes at least one of the following:

[0161] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0162] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0163] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0164] Optionally, determining and activating the first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device includes:

[0165] Based on the first error information sent by the terminal device, a first CSI feedback method is determined from at least two CSI feedback methods. If the first CSI feedback method is different from the CSI feedback method that was active when the first error information was received, the state of the first CSI feedback method is switched to the active state, and the state of the CSI feedback methods other than the first CSI feedback method among the at least two CSI feedback methods is switched to the deactivated state to obtain the first state indication information.

[0166] Optionally, the step of switching the state of the first CSI feedback mode to the active state, and switching the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, to obtain the first state indication information, includes:

[0167] The Media Access Control-Control Unit (MAC-CE) layer of the network-side device switches the state of the first CSI feedback mode to the active state, and switches the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, thereby obtaining the first state indication information.

[0168] Optionally, step 301 includes:

[0169] Receive first error information sent by at least one terminal device, determine and activate the first CSI feedback mode corresponding to each of the at least one terminal device from at least two CSI feedback modes.

[0170] Optionally, after step 302, the method further includes:

[0171] Receive the CSI reported by the terminal device based on the first CSI feedback method.

[0172] The implementation methods of the above steps can be found in the description on the terminal device side; to avoid repetition, they will not be repeated here. It should be understood that this embodiment is intended to be used in conjunction with... Figure 2 The implementation method corresponding to the network-side device side of the illustrated embodiment can be found in the following examples. Figure 2 The relevant descriptions in the illustrated embodiments will not be repeated here to avoid repetition. This implementation method can also be applied to... Figure 2 The corresponding embodiments achieve the same beneficial effects.

[0173] For ease of understanding, the following will use a specific embodiment as an example to illustrate the specific process of the CSI feedback configuration method provided by this invention. Please refer to [link / reference] for details. Figure 4 For ease of description, this embodiment will use the network-side device as the base station and the terminal device as the user equipment (UE) as an example.

[0174] The base station's RRC layer is configured with at least two CSI feedback methods. In this embodiment, the base station's RRC layer is configured with three CSI feedback methods: AI, Type II, and R16 Type II. The base station also selects AI as the initial CSI feedback method. The base station's MAC-CE layer sets Type I and R16 Type II to a deactivated state and sets AI to an active state, obtaining the corresponding initial state indication information. The base station configures the first period T1 for the UE to calculate the error index of the CSI feedback method and the second period T2 for the UE to report CSI.

[0175] The base station sends AI, Type II, R16 Type II, initial state indication information, first period T1, and second period T2 to the UE. The UE receives and saves the AI, Type II, and R16 Type II sent by the base station, and also saves T1 and T2. Based on the initial state indication information, the UE reports CSI according to the preset second period T2 based on AI.

[0176] The base station receives the CSI reported by the UE according to the second cycle T2, calculates the precoding matrix based on the CSI and AI reported by the UE, and sends downlink precoding to the UE.

[0177] At times T1, 2T1, 3T1, 4T1...kT1, the UE will calculate error information and report it to the base station. The following explanation will take times iT1 and (i+1)T1 as examples, where i is a positive integer less than k and k is a positive integer.

[0178] At time iT1, the UE determines the second error information based on the error indices of AI, Type II, and R16 Type II. Taking AI as the CSI feedback method as an example, the UE performs CSI measurement estimation to obtain the first CSI. The UE calculates the bitstream corresponding to the first CSI based on AI. Since CSI is usually a floating-point matrix, there is an error in the process of converting the first CSI into a bitstream based on AI. Then, the UE converts the bitstream based on AI, restoring the bitstream to the form of a CSI matrix. The CSI obtained by converting the bitstream through AI is recorded as the second CSI corresponding to AI. The error index of AI can be obtained by calculating the error between the second CSI and the first CSI.

[0179] Calculate the error indices for Type II and R16 Type II according to the above process, and obtain the error index W1 corresponding to AI. AI1 The error index W1 corresponding to Type II Type II The error index W1 corresponding to R16 Type II R16 TypeII .

[0180] In this embodiment, the second error information includes a target index, which is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods. Therefore, the target index is W1. AI W1 Type II and W1 R16 Type II The minimum value in the range corresponds to the CSI feedback method. In this embodiment, let W1 be... AI W1 Type II and W1 R16 Type II The minimum value in is W1 AI Then the second error information includes the index of AI.

[0181] The UE sends second error information to the base station. After receiving the second error information, the base station determines AI as the second CSI feedback mode based on the second error information. The MAC-CE layer of the base station determines whether the state of AI is active. If the state of AI is active, the base station does not switch the state of CSI feedback mode until time (i+1)T1, when the base station receives the first error information reported by the UE.

[0182] When AI is in the deactivated state, the MAC-CE layer of the base station switches AI to the activated state, sets the states of Type II and R16 Type II to the deactivated state, and obtains the corresponding second state indication information to indicate the current state of AI, Type II and R16 Type II.

[0183] The base station sends a second state indication message to the UE. After receiving the second state indication message, the UE, according to the active state AI indicated by the second state indication message, reports CSI based on the AI ​​starting from the time corresponding to the next second period jT2, where j is a positive integer. The value of j varies depending on the difference between T2 and T1.

[0184] At time (i+1)T1, the UE determines the first error information based on the error indices of AI, Type II, and R16 Type II.

[0185] Specifically, the UE obtains the first CSI at time (i+1)T1 according to the above process, and then calculates the error indices of AI, Type II, and R16 Type II to obtain the error index W2 corresponding to AI. AI1The error index W2 corresponding to Type II Type II The error index W2 corresponding to R16 Type II R16 Type II .

[0186] In this embodiment, the first error information includes target ranking, which is the ranking result of the at least two CSI feedback methods based on the error index. AI, due to limitations such as generalization, cannot guarantee that its performance will always be higher than R16 Type II. Assuming that in this embodiment, at time (i+1)T1, W2 AI W2 Type II and W2 R16 Type II The sorting order from smallest to largest is W2 Type II W2 AI W2 R16 Type II If the target sort is "Type II, AI, R16 Type II", then the index corresponding to the target sort is preset, so the first error information includes the index corresponding to the target sort.

[0187] The UE sends first error information to the base station. Upon receiving the first error information, the base station determines Type II as the first CSI feedback mode based on the first error information. The base station's MAC-CE layer determines whether the state of Type II is active. In this embodiment, since the second CSI feedback mode is AI, the state of Type II is deactivated.

[0188] The MAC-CE layer of the base station switches the state of Type II to active state, sets the states of AI and R16 Type II to inactive state, and obtains the corresponding first state indication information to indicate the current state of AI, Type II and R16 Type II.

[0189] The base station sends a first state indication message to the UE. After receiving the first state indication message, the UE, according to the active state Type II indicated by the first state indication message, reports CSI based on Type II starting from the time corresponding to the next second period (j+a)T2 according to the second period T2. The value of 'a' varies depending on the difference between T2 and T1, and 'a' is a positive integer.

[0190] To facilitate understanding, the following example will illustrate the scenario where the base station serves multiple UEs, using time iT1 as an example. Assume the UEs served by the base station are UE1, UE2, UE3, and UE4. All four UEs have pre-stored AI, Type II, and R16Type II, and their corresponding time T1 is the same.

[0191] At time iT1, the second error information reported by UE1 is target index 1, which includes the CSI feedback method index for Type II. The second error information reported by UE2 is target index 2, which includes the CSI feedback method index for R16 Type II. The second error information reported by UE3 is target sorting 1, which is "Type II, AI, R16 Type II". The second error information reported by UE4 is target sorting 2, which is "Type II, R16 Type II, AI".

[0192] In the first scenario, the base station can determine the corresponding second CSI feedback method for each of UE1, UE2, UE3, and UE4 based on the second error information reported by UE1, UE2, UE3, and UE4. In the second scenario, the base station can divide UE1, UE2, UE3, and UE4 into at least two UE groups, determine a second CSI feedback method for each UE group, and UEs within the same UE group will use the same second CSI feedback method. In the third scenario, the base station can determine a second CSI feedback method based on the second error information reported by UE1, UE2, UE3, and UE4, and all UE1, UE2, UE3, and UE4 will use this second CSI feedback method.

[0193] Taking the third scenario as an example, the base station determines Type II as the second CSI feedback mode corresponding to UE1, UE2, UE3 and UE4 based on the second error information reported by UE1, UE2, UE3 and UE4 and the system resource status. The MAC-CE layer sets the state of Type II to active state and sets the states of AI and R16 Type II to deactivated state, generates the corresponding second state indication information, and sends the second state indication information to UE1, UE2, UE3 and UE4.

[0194] After receiving the second state indication information, UE1, UE2, UE3 and UE4 will report CSI based on Type II starting from the time corresponding to the next second cycle T2, according to their respective second cycle T2.

[0195] This invention also provides a CSI feedback mode configuration device, which is a terminal device. See also... Figure 5 , Figure 5 This is one of the structural diagrams of the CSI feedback configuration device provided in this embodiment of the invention. Because the CSI feedback configuration device solves the problem based on... Figure 2 The CSI feedback configuration method in the illustrated embodiment is similar, so the implementation of the CSI feedback configuration device can refer to the implementation of the method, and the repeated parts will not be described again.

[0196] like Figure 5 As shown, this embodiment of the invention provides a CSI feedback mode configuration device 500, which is a terminal device. The CSI feedback mode configuration device 500 includes:

[0197] The first determining module 501 is used to determine the error index of each CSI feedback method among the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods; the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is obtained by the terminal device through the CSI feedback method to convert the first CSI conversion;

[0198] The second determining module 502 is used to determine the first error information based on the error indicators of the at least two CSI feedback methods;

[0199] The first sending module 503 is used to send the first error information to the network-side device. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device.

[0200] The first receiving module 504 is configured to receive first status indication information sent by the network-side device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0201] Optionally, the CSI feedback mode configuration device 500 further includes:

[0202] The second receiving module is used to receive the at least two CSI feedback methods and initial state indication information sent by the network-side device;

[0203] The initial state indication information indicates that the state of any one of the at least two CSI feedback methods is active, and the state of the other CSI feedback methods is deactivated.

[0204] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0205] Optionally, the first error information includes at least one of the following:

[0206] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0207] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0208] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0209] Optionally, the first determining module 501 is used for:

[0210] If the time interval between the moment of receiving the initial state indication information or the moment of the last determination of the error index of the at least two CSI feedback methods is equal to a preset time interval, the error index of each CSI feedback method among the at least two CSI feedback methods is determined based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods.

[0211] Optionally, the CSI feedback mode configuration device 500 further includes:

[0212] The reporting module is used to report CSI to the network-side device based on the first CSI feedback method.

[0213] The CSI feedback configuration device 500 provided in this embodiment of the invention can perform the above-described... Figure 2 The method embodiments shown are similar in principle and technical effect, and will not be described again here.

[0214] The CSI feedback method configuration device 500 of this embodiment determines first error information based on the error index of each of at least two CSI feedback methods. The terminal device sends the first error information to the network-side device, and the terminal device receives first status indication information sent by the network-side device. Through this configuration, the terminal device can calculate the error index of different CSI feedback methods based on real-time channel conditions, thereby obtaining the first error information. The network-side device can determine a CSI feedback method that better matches the channel conditions from at least two CSI feedback methods based on the first error information, thus making the CSI feedback method used by the terminal device for reporting CSI more closely matched to the real-time channel conditions, resulting in better CSI reporting quality and higher accuracy.

[0215] This invention also provides a CSI feedback mode configuration device, which is a network-side device. See also... Figure 6 , Figure 6 This is the second structural diagram of the CSI feedback configuration device provided in this embodiment of the invention. Because the CSI feedback configuration device solves the problem based on... Figure 3 The CSI feedback configuration method in the illustrated embodiment is similar, so the implementation of the CSI feedback configuration device can refer to the implementation of the method, and the repeated parts will not be described again.

[0216] like Figure 6 As shown, this embodiment of the invention provides a CSI feedback mode configuration device 600, which is a network-side device. The CSI feedback mode configuration device 600 includes:

[0217] Processing module 601 is configured to determine and activate a first CSI feedback method from at least two CSI feedback methods based on first error information sent by a terminal device, wherein the first error information is determined based on the error indices of the at least two CSI feedback methods, the error indices of the CSI feedback methods are determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is the first CSI conversion obtained by the terminal device through the CSI feedback method.

[0218] The second sending module 602 is used to send first status indication information to the terminal device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0219] Optionally, the CSI feedback mode configuration device 600 further includes:

[0220] The configuration module is used to configure at least two CSI feedback methods;

[0221] The setting module is used to set the state of any one of the at least two CSI feedback methods to an active state and the state of the other CSI feedback methods to a deactivated state, thereby obtaining initial state indication information;

[0222] The third sending module is used to send the at least two CSI feedback methods and initial status indication information to the terminal device.

[0223] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0224] Optionally, the first error information includes at least one of the following:

[0225] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0226] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0227] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0228] Optionally, the processing module 601 is used for:

[0229] Based on the first error information sent by the terminal device, a first CSI feedback method is determined from at least two CSI feedback methods. If the first CSI feedback method is different from the CSI feedback method that was active when the first error information was received, the state of the first CSI feedback method is switched to the active state, and the state of the CSI feedback methods other than the first CSI feedback method among the at least two CSI feedback methods is switched to the deactivated state to obtain the first state indication information.

[0230] Optionally, the step of switching the state of the first CSI feedback mode to the active state, and switching the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, to obtain the first state indication information, includes:

[0231] The Media Access Control-Control Unit (MAC-CE) layer of the network-side device switches the state of the first CSI feedback mode to the active state, and switches the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, thereby obtaining the first state indication information.

[0232] Optionally, the processing module 601 includes:

[0233] The processing unit is configured to receive first error information sent by at least one terminal device, determine and activate the first CSI feedback mode corresponding to each of the at least one terminal device from at least two CSI feedback modes.

[0234] Optionally, the CSI feedback mode configuration device 600 further includes:

[0235] The third receiving module is used to receive the CSI reported by the terminal device based on the first CSI feedback method.

[0236] The CSI feedback configuration device 600 provided in this embodiment of the invention can perform the above-described... Figure 3 The method embodiments shown are similar in principle and technical effect, and will not be described again here.

[0237] The CSI feedback method configuration device 600 of this embodiment of the invention can determine a CSI feedback method that is more in line with the channel state from at least two CSI feedback methods based on the first error information, thereby making the CSI feedback method used by the terminal device to report CSI more compatible with the real-time channel state, and improving the reporting quality and accuracy of CSI.

[0238] This invention also provides a CSI feedback configuration device, which is a terminal device. Because the principle of the CSI feedback configuration device in solving the problem is similar to... Figure 2 The CSI feedback configuration method in the illustrated embodiment is similar; therefore, the implementation of the CSI feedback configuration device can be found in the method implementation, and repeated details will not be elaborated further. Figure 7 As shown, the base station of this embodiment includes: a processor 700, configured to read a program from a memory 720 and execute the following processes:

[0239] Based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods, an error index for each of the at least two CSI feedback methods is determined; the second CSI is the CSI obtained by the terminal device recovering the bitstream through the CSI feedback method, and the bitstream is obtained by the terminal device converting the first CSI through the CSI feedback method;

[0240] The first error information is determined based on the error indices of the at least two CSI feedback methods;

[0241] Processor 700 is used to read the program from memory 720 and execute the following procedures:

[0242] The first error information is sent to the network-side device via transceiver 710. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device.

[0243] The transceiver 710 receives first status indication information sent by the network-side device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in a deactivated state.

[0244] Transceiver 710 is used to receive and send data under the control of processor 700.

[0245] Among them, Figure 7 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 700 and memory represented by memory 720 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 710 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium. For different user equipment, the user interface 730 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0246] Optionally, the processor 700 is also used to read the program from the memory 720 and perform the following steps:

[0247] The transceiver 710 receives the at least two CSI feedback methods and initial status indication information sent by the network-side device.

[0248] The initial state indication information indicates that the state of any one of the at least two CSI feedback methods is active, and the state of the other CSI feedback methods is deactivated.

[0249] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0250] Optionally, the first error information includes at least one of the following:

[0251] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0252] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0253] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0254] Optionally, the processor 700 is also used to read the program from the memory 720 and perform the following steps:

[0255] If the time interval between the moment of receiving the initial state indication information or the moment of the last determination of the error index of the at least two CSI feedback methods is equal to a preset time interval, the error index of each CSI feedback method among the at least two CSI feedback methods is determined based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods.

[0256] Optionally, the processor 700 is also used to read the program from the memory 720 and perform the following steps:

[0257] The transceiver 710 reports CSI to the network-side device based on the first CSI feedback method.

[0258] The CSI feedback configuration device provided in this embodiment of the invention can perform the above-described... Figure 2 The method embodiments shown are similar in principle and technical effect, and will not be described again here.

[0259] This invention also provides a CSI feedback configuration device, which is a network-side device. Because the principle of the CSI feedback configuration device in solving the problem is similar to... Figure 3 The CSI feedback configuration method in the illustrated embodiment is similar; therefore, the implementation of the CSI feedback configuration device can be found in the method implementation, and repeated details will not be elaborated further. Figure 8 As shown, the CSI feedback configuration device of this embodiment includes: a processor 800, configured to read a program from a memory 820 and execute the following processes:

[0260] Based on the first error information sent by the terminal device, a first CSI feedback method is determined and activated from at least two CSI feedback methods. The first error information is determined based on the error indices of the at least two CSI feedback methods. The error indices of the CSI feedback methods are determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method. The second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bitstream. The bitstream is obtained by the terminal device through the CSI feedback method to convert the first CSI.

[0261] Processor 800 is used to read the program from memory 820 and execute the following procedures:

[0262] The transceiver 810 sends a first status indication message to the terminal device, the first status indication message indicating that the first CSI feedback method is in an active state, and indicating that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

[0263] Transceiver 810 is used to receive and send data under the control of processor 800.

[0264] Among them, Figure 8 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 800) and memory (memory 820). The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 810 can be multiple elements, including transmitters and transceivers, providing a unit for communicating with various other devices over a transmission medium. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 during operation.

[0265] The processor 800 is responsible for managing the bus architecture and general processing, while the memory 820 can store the data used by the processor 800 during operation.

[0266] Optionally, the processor 800 is also used to read the program from the memory 820 and perform the following steps:

[0267] Configure at least two CSI feedback methods;

[0268] Set the state of any one of the at least two CSI feedback methods to the active state, and set the state of the other CSI feedback methods to the deactivated state, thereby obtaining initial state indication information;

[0269] The transceiver 810 sends the at least two CSI feedback methods and initial status indication information to the terminal device.

[0270] Optionally, the at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

[0271] Optionally, the first error information includes at least one of the following:

[0272] An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods;

[0273] The target ranking is the ranking result of the at least two CSI feedback methods based on the error index;

[0274] The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

[0275] Optionally, the processor 800 is also used to read the program from the memory 820 and perform the following steps:

[0276] Based on the first error information sent by the terminal device, a first CSI feedback method is determined from at least two CSI feedback methods. If the first CSI feedback method is different from the CSI feedback method that was active when the first error information was received, the state of the first CSI feedback method is switched to the active state, and the state of the CSI feedback methods other than the first CSI feedback method among the at least two CSI feedback methods is switched to the deactivated state to obtain the first state indication information.

[0277] Optionally, the processor 800 is also used to read the program from the memory 820 and perform the following steps:

[0278] The MAC-CE layer of the network-side device switches the state of the first CSI feedback mode to the active state, and switches the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, thereby obtaining the first state indication information.

[0279] Optionally, the processor 800 is also used to read the program from the memory 820 and perform the following steps:

[0280] The transceiver 810 receives first error information sent by at least one terminal device, and determines and activates the first CSI feedback mode corresponding to each of the at least one terminal device from at least two CSI feedback modes.

[0281] Optionally, the processor 800 is also used to read the program from the memory 820 and perform the following steps:

[0282] The transceiver 810 receives the CSI reported by the terminal device based on the first CSI feedback method.

[0283] The CSI feedback configuration device provided in this embodiment of the invention can perform the above-described... Figure 3 The method embodiments shown are similar in principle and technical effect, and will not be described again here.

[0284] The readable storage medium provided in this application embodiment is used to store a program, which can be executed by a processor to implement as follows: Figure 2 The various steps in the method embodiments shown, or implementations such as Figure 3 Each step in the method embodiment shown.

[0285] In the several embodiments provided in this application, it should be understood that the disclosed methods and apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0286] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can be physically comprised separately, or two or more units can be integrated into one unit. The integrated unit described above can be implemented in hardware or in the form of hardware plus software functional units.

[0287] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the transmission and reception methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0288] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for configuring Channel State Information (CSI) feedback, applied to a terminal device, characterized in that, include: Based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods, an error index for each of the at least two CSI feedback methods is determined; the second CSI is the CSI obtained by the terminal device recovering the bitstream through the CSI feedback method, and the bitstream is obtained by the terminal device converting the first CSI through the CSI feedback method; The first error information is determined based on the error indices of the at least two CSI feedback methods; The first error information is sent to the network-side device. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device. The system receives first status indication information sent by the network-side device. The first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

2. The method according to claim 1, characterized in that, Before determining the error index of each of the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the method further includes: Receive the at least two CSI feedback methods and initial status indication information sent by the network-side device; The initial state indication information indicates that the state of any one of the at least two CSI feedback methods is active, and the state of the other CSI feedback methods is deactivated.

3. The method according to claim 1, characterized in that, The at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and Artificial Intelligence (AI).

4. The method according to claim 1, characterized in that, The first error information includes at least one of the following: An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods; The target ranking is the ranking result of the at least two CSI feedback methods based on the error index; The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

5. The method according to claim 1, characterized in that, The step of determining the error index for each of the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to each of the at least two CSI feedback methods includes: If the time interval between the moment of receiving the initial state indication information or the moment of the last determination of the error index of the at least two CSI feedback methods is equal to a preset time interval, the error index of each CSI feedback method among the at least two CSI feedback methods is determined based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods.

6. The method according to claim 1, characterized in that, After receiving the first status indication information sent by the network-side device, the method further includes: The CSI is reported to the network-side device based on the first CSI feedback method.

7. A CSI feedback configuration method, applied to network-side equipment, characterized in that, include: Based on the first error information sent by the terminal device, a first CSI feedback method is determined and activated from at least two CSI feedback methods, wherein the first error information is determined based on the error index of the at least two CSI feedback methods, the error index of the CSI feedback method is determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the second CSI is the CSI obtained by the terminal device to recover the bit stream through the CSI feedback method, and the bit stream is the first CSI converted by the terminal device through the CSI feedback method; Send a first status indication message to the terminal device. The first status indication message indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

8. The method according to claim 7, characterized in that, Before determining the first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device, the method further includes: Configure at least two CSI feedback methods; Set the state of any one of the at least two CSI feedback methods to the active state, and set the state of the other CSI feedback methods to the deactivated state, thereby obtaining initial state indication information; Send the at least two CSI feedback methods and initial status indication information to the terminal device.

9. The method according to claim 7, characterized in that, The at least two CSI feedback methods include at least two of the following: Type I, Type II, R16 Type II, and AI.

10. The method according to claim 7, characterized in that, The first error information includes at least one of the following: An error index set, the error index set including the error index corresponding to each of the at least two CSI feedback methods; The target ranking is the ranking result of the at least two CSI feedback methods based on the error index; The target index is the CSI feedback method index corresponding to the CSI feedback method with the smallest error index among the at least two CSI feedback methods.

11. The method according to claim 7, characterized in that, The step of determining and activating a first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device includes: Based on the first error information sent by the terminal device, a first CSI feedback method is determined from at least two CSI feedback methods. If the first CSI feedback method is different from the CSI feedback method that was active when the first error information was received, the state of the first CSI feedback method is switched to the active state, and the state of the CSI feedback methods other than the first CSI feedback method among the at least two CSI feedback methods is switched to the deactivated state to obtain the first state indication information.

12. The method according to claim 11, characterized in that, The step of switching the state of the first CSI feedback mode to the active state, and switching the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, to obtain the first state indication information, includes: The Media Access Control-Control Unit (MAC-CE) layer of the network-side device switches the state of the first CSI feedback mode to the active state, and switches the state of the CSI feedback modes other than the first CSI feedback mode among the at least two CSI feedback modes to the deactivated state, thereby obtaining the first state indication information.

13. The method according to claim 7, characterized in that, The step of determining and activating a first CSI feedback method from at least two CSI feedback methods based on the first error information sent by the terminal device includes: Receive first error information sent by at least one terminal device, determine and activate the first CSI feedback mode corresponding to each of the at least one terminal device from at least two CSI feedback modes.

14. The method according to claim 7, characterized in that, After sending the first status indication information to the terminal device, the method further includes: Receive the CSI reported by the terminal device based on the first CSI feedback method.

15. A CSI feedback mode configuration device, wherein the CSI feedback mode configuration device is a terminal device, characterized in that, include: The first determining module is used to determine the error index of each CSI feedback method among the at least two CSI feedback methods based on the error between the first CSI and the second CSI corresponding to each CSI feedback method among the at least two CSI feedback methods; the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is the first CSI obtained by the terminal device through the CSI feedback method; The second determining module is used to determine the first error information based on the error indicators of the at least two CSI feedback methods; The first sending module is used to send the first error information to the network-side device. The first error information is used to determine and activate the first CSI feedback method from the at least two CSI feedback methods. The first CSI feedback method is the feedback method in which the terminal device reports CSI to the network-side device. The first receiving module is configured to receive first status indication information sent by the network-side device, wherein the first status indication information indicates that the first CSI feedback method is in an active state, and indicates that the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, are in an inactive state.

16. A CSI feedback mode configuration device, wherein the CSI feedback mode configuration device is a network-side device, characterized in that, include: A processing module is configured to determine and activate a first CSI feedback method from at least two CSI feedback methods based on first error information sent by a terminal device, wherein the first error information is determined based on the error indices of the at least two CSI feedback methods, the error indices of the CSI feedback methods are determined based on the error between the first CSI and the second CSI corresponding to the CSI feedback method, the second CSI is the CSI obtained by the terminal device through the CSI feedback method to recover the bit stream, and the bit stream is the first CSI obtained by the terminal device through the CSI feedback method. The second sending module is used to send first status indication information to the terminal device. The first status indication information indicates that the state of the first CSI feedback method is active, and indicates that the state of the other CSI feedback methods among the at least two CSI feedback methods, excluding the first CSI feedback method, is deactivated.

17. A CSI feedback configuration device, wherein the CSI feedback configuration device is a terminal device, comprising: A transceiver, a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, The processor is configured to read a program from memory to implement the steps of the method as described in any one of claims 1 to 6.

18. A CSI feedback configuration device, wherein the CSI feedback configuration device is a network-side device, comprising: A transceiver, a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, The processor is configured to read a program from memory to implement the steps of the method as described in any one of claims 7 to 14.

19. A readable storage medium for storing a program, characterized in that, When the program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 6, or the steps of the method as described in any one of claims 7 to 14.

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