Method and apparatus for feeding back channel information

Abstract

A method and apparatus for feeding back channel information. The method comprises: an access network device sends a feedback mode map to a terminal, the feedback mode map comprising the correspondences between different spaces and feedback modes. The terminal can match a corresponding space on the basis of geographic location information of the terminal, and feed back channel information to the access network device on the basis of the feedback mode corresponding to the space, thereby improving the feedback efficiency of downlink data, and reducing air interface overhead.

Description

A method and device for feeding back channel information

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on January 5, 2024, with application number 202410029499.2 and application name “A method and device for feedback channel information”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a method and device for feeding back channel information. Background Art

[0004] With the continuous development of wireless communications, wireless communication application scenarios are becoming increasingly diverse, such as smartphones, the Internet of Vehicles, and the Internet of Things. As the number of terminals increases, so too does the demand for communication quality. Next-generation wireless communication systems are expected to generate large amounts of over-the-air data, such as channel information. How to efficiently feed this information back to access network equipment is a research area. Summary of the Invention

[0005] The embodiments of the present application provide a method and apparatus for feeding back channel information, in order to reduce the transmission overhead caused by air interface data and improve information feedback efficiency.

[0006] In a first aspect, a method for feeding back channel information is provided, which is applied to a first communication device and includes: obtaining indication information of a correspondence between spatial information and a feedback mode, the feedback mode including a mode in which the first communication device feeds back channel information to a second communication device; and feeding back first information to the second communication device, the first information being determined based on the first feedback mode, which is determined based on the correspondence between the spatial information and the feedback mode and the position information of the first communication device.

[0007] In the above design, assuming the first communication device is a terminal and the second communication device is an access network device, the access network device sends a feedback mode map to the terminal. This map includes the correspondence between different spaces and feedback modes. The terminal can match the corresponding space based on its geographic location and, based on the feedback mode corresponding to that space, feedback channel information to the access network device. This improves downlink data feedback efficiency and reduces air interface overhead.

[0008] In one possible implementation, the feedback mode includes an electromagnetic map-related feedback mode or an electromagnetic map-independent feedback mode. For example, the electromagnetic map-related feedback mode includes a mode for feeding back location information and a mode for feeding back calibration multipath information. The electromagnetic map-independent feedback mode includes a Type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

[0009] In a possible implementation, it also includes: feeding back second information to the second communication device, where the second information is accuracy information of the channel information fed back by the first terminal device in different feedback modes, and the accuracy information of the channel information is used to determine the correspondence between the spatial information and the feedback mode.

[0010] Through the above design, when the second communication device receives the second information, it can determine the correspondence between the spatial information and the feedback mode according to the second information.

[0011] In a possible implementation, feeding back the accuracy information of the channel information in different feedback modes includes: in different feedback modes, the first communication device feeding back the accuracy information of the channel information at different locations and / or at different times.

[0012] In one possible implementation, the first feedback mode is determined based on the correspondence between the spatial information and the feedback mode and the location information of the first communication device, including: the first feedback mode is a feedback mode corresponding to the first spatial information, and the first spatial information is determined based on the location information of the first communication device.

[0013] In a possible implementation, the spatial information is represented by the following means: a reference point of an electromagnetic map, a K-ary tree leaf node, or a reference point of a geographic map.

[0014] In a possible implementation, when the spatial information is represented by reference points in the electromagnetic map, obtaining information indicating the correspondence between the spatial information and the feedback mode includes: obtaining an electromagnetic map, wherein the electromagnetic map includes information indicating the correspondence between the reference points and the feedback mode.

[0015] Through the above design, by adopting the method of merging and sending the correspondence between the electromagnetic map, spatial information and feedback mode, the access network device does not need to additionally indicate the spatial information in the correspondence to the terminal, but only needs to indicate the feedback mode in the correspondence.

[0016] In a possible implementation, when the first feedback mode is associated with an electromagnetic map when feeding back the first information, the method further includes: acquiring an electromagnetic map of the first spatial information corresponding to the first feedback mode.

[0017] Through the above design, in the correspondence between spatial information and feedback modes, some feedback modes are related to electromagnetic maps, that is, when the terminal uses this feedback mode to feedback the first information, it needs to use the electromagnetic map; some feedback modes are unrelated to the electromagnetic map, that is, when the terminal uses this feedback mode to feedback the first information, it does not need to use the electromagnetic map. In an embodiment of the present application, when a certain feedback mode is related to the electromagnetic map when feeding back the first information: assuming that the feedback mode is the first feedback mode, the access network device can send the electromagnetic map of the first spatial information corresponding to the first feedback mode to the terminal; for a certain feedback mode is unrelated to the electromagnetic map when feeding back the first information: assuming that the feedback mode is the second feedback mode, the access network device no longer sends the electromagnetic map of the second spatial information corresponding to the second feedback mode to the terminal. Through the above, the access network device sends the electromagnetic map of partial spatial information to the terminal without sending the complete electromagnetic map, thereby reducing the wireless resource overhead of transmitting the electromagnetic map.

[0018] In a possible implementation manner, the method further includes: acquiring third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

[0019] This design allows access network equipment to flexibly update the mapping between spatial information and feedback modes, allowing terminals to adopt the optimal feedback mode for transmitting channel information in the corresponding space. Furthermore, based on the accuracy of different feedback modes reported by terminals, access network equipment can further refine the mapping between spatial information and feedback modes, improving their precision.

[0020] In a possible implementation, updating the correspondence between the spatial information and the feedback mode includes at least one of the following: deleting one or more feedback modes corresponding to the spatial information, replacing one or more feedback modes corresponding to the spatial information, or adding one or more feedback modes corresponding to the spatial information.

[0021] In a possible implementation, adding a feedback mode corresponding to a new spatial information includes: adding a correspondence between a spatial information and a feedback mode, or dividing the spatial information into a plurality of subspace information and adding a correspondence between the plurality of subspaces and feedback modes.

[0022] The second aspect is a device corresponding to the first aspect. For the beneficial effects, please refer to the description of the first aspect. A method for feeding back channel information is provided. The method is applied to the second communication device, including: sending indication information of the correspondence between spatial information and feedback mode to the first communication device, the feedback mode including the mode in which the first communication device feeds back channel information to the second communication device; receiving first information from the first communication device, the first information is determined according to the first feedback mode, and the first feedback mode is determined according to the correspondence between the spatial information and the feedback mode and the position information of the first communication device.

[0023] In one possible implementation, the feedback mode includes an electromagnetic map-related feedback mode or an electromagnetic map-independent feedback mode. Optionally, the electromagnetic map-related feedback mode includes a mode for feeding back location information and a mode for feeding back calibration multipath information. The electromagnetic map-independent feedback mode includes a Type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

[0024] In a possible implementation, it also includes: receiving second information from the first communication device, the second information is accuracy information of the channel information fed back by the first terminal device in different feedback modes, and the accuracy information of the channel information is used to determine the correspondence between the spatial information and the feedback mode.

[0025] In a possible implementation, feeding back the accuracy information of the channel information in different feedback modes includes: in different feedback modes, the first communication device feeding back the accuracy information of the channel information at different locations and / or at different times.

[0026] In one possible implementation, the first feedback mode is determined based on the correspondence between the spatial information and the feedback mode and the location information of the first communication device, including: the first feedback mode is a feedback mode corresponding to the first spatial information, and the first spatial information is determined based on the location information of the first communication device.

[0027] In a possible implementation, the spatial information is represented by the following means: a reference point of an electromagnetic map, a K-ary tree leaf node, or a reference point of a geographic map.

[0028] In a possible implementation, when the spatial information is represented by reference points in the electromagnetic map, sending the indication information of the correspondence between the spatial information and the feedback mode includes: sending the electromagnetic map, where the electromagnetic map includes the indication information of the correspondence between the reference points and the feedback mode.

[0029] In a possible implementation, when the first feedback mode is associated with an electromagnetic map when feeding back the first information, the method further includes: sending the electromagnetic map of the first spatial information corresponding to the first feedback mode.

[0030] In a possible implementation manner, the method further includes sending third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

[0031] In a possible implementation, updating the correspondence between the spatial information and the feedback mode includes at least one of the following: deleting one or more feedback modes corresponding to the spatial information, replacing one or more feedback modes corresponding to the spatial information, or adding one or more feedback modes corresponding to the spatial information.

[0032] In a possible implementation, adding a feedback mode corresponding to a new spatial information includes: adding a correspondence between a spatial information and a feedback mode, or dividing the spatial information into a plurality of subspace information and adding a correspondence between the plurality of subspaces and feedback modes.

[0033] In a third aspect, a device is provided that can implement the method of the first aspect. For example, the device includes means for executing the method of the first aspect. The device can be implemented in hardware, software, or by executing the corresponding software implementation in hardware.

[0034] In one possible design, the apparatus includes a unit for executing the above-mentioned first aspect.

[0035] In one possible design, the apparatus includes a processor configured to execute the method of the first aspect.

[0036] In one possible design, the device includes a processing circuit and an interface circuit. The interface circuit is configured to receive signals from a device outside the device and transmit them to the processing circuit, or to transmit signals from the processing circuit to the device outside the device. The processing circuit implements the method of the first aspect described above by means of a logic circuit or by executing code instructions. Alternatively, the processing circuit may be a processor, and the interface circuit may be a transceiver or an input / output interface.

[0037] In one possible design, the device includes a processor and a memory; wherein the processor is used to execute a computer program or instructions stored in the memory; the memory is used to store the computer program or the instructions; when the computer program or the instructions are run, the method of the first aspect is executed.

[0038] Optionally, the device may be the first device, or a module or unit (for example, a chip, or a chip system, or a circuit) in the first device that corresponds one-to-one to the method / operation / step / action described in the first aspect, or a device that can be used in combination with the first device.

[0039] In a fourth aspect, a device is provided that can implement the method of the second aspect. For example, the device includes means for executing the method of the second aspect. The device can be implemented in hardware, software, or by executing the corresponding software implementation in hardware.

[0040] In one possible design, the apparatus includes a unit for executing the second aspect described above.

[0041] In one possible design, the device includes a processor, which is used to execute the method of the second aspect above.

[0042] In one possible design, the device includes a processing circuit and an interface circuit, the interface circuit is used to receive signals from other devices outside the device and transmit them to the processing circuit or send signals from the processing circuit to other devices outside the device, and the processing circuit is used to implement the method in the above-mentioned second aspect through a logic circuit or executing code instructions.

[0043] In one possible design, the device includes a processor and a memory; wherein the processor is used to execute a computer program or instructions stored in the memory; the memory is used to store the computer program or the instructions; when the computer program or the instructions are run, the method of the second aspect is executed.

[0044] Optionally, the device may be a second device, or a module or unit (for example, a chip, or a chip system, or a circuit) in the second device that corresponds one-to-one to the method / operation / step / action described in the second aspect, or may be capable of being used in combination with the second device.

[0045] In a fifth aspect, a computer-readable storage medium is provided, which stores a computer program or instruction. When the computer program or instruction is run on a computer, the computer executes the method of the first aspect or the second aspect mentioned above.

[0046] In a sixth aspect, a computer program product is provided, wherein the computer program product includes a computer program or instructions for executing the method described in the first aspect, or the computer program product includes a computer program or instructions for executing the method described in the second aspect.

[0047] In a seventh aspect, a chip is provided, comprising a processor, wherein the processor is coupled to a memory and is configured to execute a computer program or instruction stored in the memory, so that the chip implements the method of the first or second aspect above.

[0048] In an eighth aspect, a communication system is provided, comprising: a first communication device and a second communication device; wherein the first communication device is used to implement the method of the first aspect, and the second communication device is used to implement the method of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0050] FIG2 is a schematic diagram of an electromagnetic map provided in an embodiment of the present application;

[0051] FIG3 is a schematic diagram of a process provided by an embodiment of the present application;

[0052] FIG4 is a schematic diagram of the correspondence between spatial information and feedback modes provided in an embodiment of the present application;

[0053] FIG5 is another schematic diagram of the correspondence between spatial information and feedback modes provided in an embodiment of the present application;

[0054] FIG6 is a schematic diagram of further dividing spatial information and feedback modes of reference points provided by an embodiment of the present application;

[0055] 7 is a schematic diagram of the accuracy of different feedback modes reported by the terminal according to an embodiment of the present application;

[0056] FIG8 is a schematic diagram of binding transmission of first information and second information provided in an embodiment of the present application;

[0057] FIG9 is a schematic diagram of the correspondence between spatial information and feedback modes provided in an embodiment of the present application;

[0058] 10 and 11 are schematic diagrams of updating spatial information and feedback modes according to embodiments of the present application;

[0059] FIG12 is another schematic diagram of a process according to an embodiment of the present application;

[0060] 13 and 14 are schematic diagrams of the structure of the device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of this application more clear, the application will be further described in detail below with reference to the accompanying drawings. The specific operation methods and functional descriptions in the method embodiments can also be applied to the device embodiments or system embodiments.

[0062] The various numbers and terms such as "first" and "second" used in the embodiments of this application are merely for convenience of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily indicate the order in which they are executed. The order in which the processes are executed should be determined by their functions and internal logic.

[0063] In the embodiments of the present application, the number of nouns, unless otherwise specified, means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. "Including at least one of A, B or C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0064] Figure 1 shows a possible, non-limiting system diagram. As shown in Figure 1 , a communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. Optionally, the Internet 300 is also included.

[0065] 1. RAN

[0066] The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1 , collectively referred to as 110) and at least one terminal (e.g., 120a to 120j in FIG. 1 , collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment (not shown in FIG. 1).

[0067] Terminal 120 can be connected to RAN node 110 wirelessly. RAN node 110 is connected to core network 200 wirelessly or by wire. The core network element in core network 200 and RAN node 110 in RAN 100 can be different physical devices, or they can be a single physical device that integrates the logical functions of the core network element and the logical functions of the radio access network.

[0068] The multiple RAN nodes 110 in the communication system 10 can be nodes of the same type or different types. In some scenarios, the roles of the RAN nodes 110 and the terminals 120 are relative. For example, in FIG1 , the network element 120i can be a helicopter or a drone, which can be configured as a mobile base station. For the terminals 120j accessing the RAN 100 through the network element 120i, the network element 120i is a base station; however, for the base station 110a, the network element 120i is a terminal.

[0069] RAN100 can be a cellular system related to the Third Generation Partnership Project (3GPP), such as a fourth generation (4G) mobile communication system, a fifth generation (5G) mobile communication system, or a future-oriented evolution system, such as a sixth generation (6G) mobile communication system. RAN100 can also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. RAN100 can also be a communication system that integrates two or more of the above systems.

[0070] 1.1 RAN Node

[0071] In one possible scenario, a RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node may be a macro base station (such as 110a in FIG1 ), a micro base station or an indoor station (such as 110b in FIG1 ), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, a RAN node may also be a server, a wearable device, a vehicle or an onboard device. For example, an access network device in vehicle to everything (V2X) technology may be a road side unit (RSU). All or part of the functions of the RAN node in the embodiments of the present application may also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform). The RAN node in the embodiments of the present application may also be a logical node, a logical module, or software that can implement all or part of the functions of the RAN node.

[0072] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0073] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0074] A RAN node, sometimes also referred to as an access network device, RAN entity, or access node, constitutes part of a communication system and helps terminals achieve wireless access. In the subsequent description of this application, unless otherwise specified, the term "access network device" is used for description.

[0075] It is understandable that the access network device can be referred to as a communication device. For example, the access network device can be understood as a device having the function of an access network device. For example, the device for implementing the function of the access network device can be the access network device; or some components in the access network device, such as CU, DU, etc. It can also be a device that can support the access network device to implement the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module. The device can be installed in the access network device or can be used in conjunction with the access network device. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0076] 1.2 Terminal

[0077] A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. The terminal can be a mobile phone, a head-mounted display device, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. The embodiments of the present application do not limit the device form of the terminal.

[0078] It is understood that a terminal can be referred to as a communication device. For example, a terminal can be understood as a device that has terminal functions. For example, a device used to implement the terminal function can be a terminal; it can also be a device that supports the terminal in implementing the function, such as a chip system, hardware circuit, software module, or hardware circuit and software module, which can be installed in the terminal or can be used in conjunction with the terminal.

[0079] 2. CN

[0080] CN200 includes at least one core network element. Taking the 5G communication system as an example, CN200 includes the access and mobility management function (AMF) network element, the session management function (SMF) network element, the user plane function (UPF) network element, the policy control function (PCF) network element, the unified data management (UDM) network element, and the application function (AF) network element.

[0081] In the communication system shown in FIG1 , an electromagnetic map is provided in the access network device. For example, the access network device establishes an electromagnetic map through actual measurement, environmental modeling + ray tracing (RT), or artificial intelligence (AI). The electromagnetic map is used to characterize the distribution of electromagnetic signals in the environment. It records the strength and characteristics of various electromagnetic signals in a specific area. For example, the electromagnetic map may partially or completely include, but is not limited to: multipath information, noise level, and spectrum occupancy of one or more locations. For example, the electromagnetic map may include information on regular areas and / or information on irregular areas, each area corresponding to one or more reference points. Regular areas may also be referred to as grid areas, and the reference points corresponding to the grid areas may also be referred to as grids, or grid points, etc. Exemplarily, an area may include the following information:

[0082] 1. Channel state information

[0083] a) at least one path, each path corresponding to a multipath information;

[0084] b) Scalar strength indicators, such as channel impulse response (CIR), channel quality indicator (CQI), power delay profile (PDP), or angle delay profile (ADP).

[0085] 2. Information about the virtual anchor of the scattering point or virtual station.

[0086] 3. Other information.

[0087] Taking the multipath information in the channel state information as an example, the electromagnetic map on the access network equipment side Corresponding to at least one reference point, each reference point corresponds to a geographical area, used to characterize the multipath information from the access network equipment to the terminal in this geographical area. As shown in Figure 2, the electromagnetic map Mainly include:

[0088] 1. Electromagnetic map elements of N reference points N is an integer greater than zero.

[0089] 2. Electromagnetic map elements for each reference point Including the M between the access network equipment and the reference point n Multipath information of a path, M n An integer greater than zero.

[0090] 3. The multipath information of each path includes amplitude, delay and angle. Among them, the amplitude can exist in the form of signal amplitude or power. If the access network equipment and terminal use dual-polarized antennas, the amplitude is a 2*2 matrix, and the angle includes the angle of arrival (AoA) and the angle of departure (AoD). Furthermore, if the antenna array is a uniform linear array (ULA), AoA and AoD are scalars. Alternatively, if the antenna array is a uniform planar array (UPA), AoA and AoD can be expressed in terms of pitch angle and yaw angle. In the following description, "amplitude" is taken as "power" as an example, and the angle includes AoA and AoD as an example for description.

[0091] In the communication system shown in Figure 1, a terminal can provide downlink channel information to the access network device. Based on the downlink channel information provided by the terminal, the access network device performs precoding and other operations on the downlink data, thereby improving downlink data transmission quality. In one solution, the terminal uses a single feedback mode to provide downlink channel information to the access network device. Due to the different geographical locations of terminals, the optimal feedback mode may vary. Using a single feedback mode to provide downlink data information to the access network device may result in low downlink data feedback efficiency and high air interface overhead.

[0092] In light of this, embodiments of the present application provide a method and apparatus for providing channel information feedback. The method includes: an access network device sending a feedback mode map to a terminal, the feedback mode map including correspondences between different spaces and feedback modes. The terminal can match the corresponding space based on its geographic location information and, based on the feedback mode corresponding to the space, provide channel information feedback to the access network device, thereby improving downlink data feedback efficiency and reducing air interface overhead.

[0093] In the following process description, "terminal" and "access network device" are used as the execution entities. "Terminal" can be understood as a device with terminal functions. For example, "terminal" can be replaced by "first communication device", and the first communication device is a device that implements the terminal function. For example, the first communication device is a terminal, or the first communication device can be a module in the terminal (for example, a chip or circuit, etc.). "Access network device" can be understood as a device with access network device functions. For example, "access network device" can be replaced by "second communication device", and the second communication device is a device that implements the access network device function. For example, the second communication device is an access network device, or the second communication device can be a module in the access network device (for example, a chip or circuit, etc.), or it can be a logical node (for example, CU, DU or RU), a logical module or software that fully or partially implements the access network device function.

[0094] [Example 1]

[0095] As shown in FIG3 , the embodiment of the present application provides a flow chart, including:

[0096] Step 310: The access network device sends indication information of the correspondence between spatial information and feedback mode to the terminal, and the terminal receives the indication information of the correspondence between spatial information and feedback mode from the access network device.

[0097] For example, the feedback mode includes a mode in which the terminal feeds back channel information to the access network device. The terminal can determine the correspondence between the spatial information and the feedback mode based on the received indication information of the correspondence between the spatial information and the feedback mode. In one possible implementation, the access network device sends a feedback mode map to the terminal, and the feedback mode map includes indication information of the correspondence between the spatial information and the feedback mode. The indication information can display the correspondence between the spatial information and the feedback mode, or implicitly indicate the correspondence between the spatial information and the feedback mode, without limitation. When the terminal receives the feedback mode map, it obtains the indication information of the correspondence between the spatial information and the feedback mode in the feedback mode map, and determines the correspondence between the spatial information and the feedback mode. For example, the feedback mode map sent by the access network device to the terminal includes K correspondences between spatial information and feedback modes, and a correspondence between spatial information and feedback mode is represented as F i , i is a positive integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 1. The feedback mode map can be expressed as: F:{F1,…,F K}, which specifically includes: F:{{spatial information 1, feedback mode},{spatial information 2, feedback mode},…,{spatial information K, feedback mode}}.

[0098] 1. Indication of feedback mode.

[0099] The access network device may indicate to the terminal the corresponding feedback mode for each piece of spatial information. Alternatively, the access network device and the terminal may pre-establish an agreed-upon correspondence between the feedback mode and its index. When indicating the correspondence between spatial information and the feedback mode to the terminal, the access network device may indicate to the terminal the corresponding index of the feedback mode. "Index" may be replaced with "identifier."

[0100] The "feedback mode" may refer to the feedback mode used by the terminal when feeding back channel information to the access network device. For example, the feedback mode may include an electromagnetic map-related feedback mode or an electromagnetic map-independent feedback mode. The electromagnetic map-related feedback mode requires the use of an electromagnetic map when feeding back the first information. The electromagnetic map-independent feedback mode requires the use of an electromagnetic map when feeding back the first information.

[0101] For example, electromagnetic map-related feedback modes include a mode for feeding back position information and a mode for feeding back calibration multipath information.

[0102] Position information feedback mode: Based on the position information, the terminal identifies a matching reference point in the electromagnetic map. For example, each reference point in the electromagnetic map has a certain coverage area. The terminal can identify a reference point in the electromagnetic map that covers the terminal's current location and consider this reference point as the matching reference point. The terminal's position information can refer to the terminal's geographic location, which can be expressed in coordinates. For example, the terminal's geographic location can be expressed as the terminal's longitude and latitude coordinates. Furthermore, it can include the terminal's altitude coordinates. The terminal can feedback the position information of the matching reference point to the access network device. The access network device determines the multipath information of the reference point based on the position information provided by the terminal. Furthermore, based on the multipath information of the reference point, it performs operations such as precoding for downlink data. For example, the position information of the reference point can be an index of the reference point or the coordinates of the reference point in the electromagnetic map. Alternatively, the terminal can feedback the terminal's position information to the access network device. Upon receiving the terminal's position information, the access network device identifies a matching reference point in the electromagnetic map. Based on the multipath information of the matching reference point, the access network device performs operations such as precoding for downlink data.

[0103] In the mode that provides feedback for calibrated multipath information, the terminal performs channel estimation on the downlink reference signal to determine local multipath information. Based on its location information, the terminal identifies a matching reference point in the electromagnetic map. Using the multipath information from the matching reference point, the terminal calibrates the local multipath information to determine the calibrated multipath information. The terminal then feeds back the calibrated multipath information to the access network device, which then performs operations such as downlink data precoding based on the calibrated multipath information. Optionally, in the calibrated multipath information feedback mode, the terminal can also provide the access network device with feedback for its location information.

[0104] For example, electromagnetic map-independent feedback modes include a type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

[0105] Type II CSI feedback mode: This includes a Type II CSI codebook, also referred to as Type II CSI. In this mode, the terminal receives a downlink reference signal from the access network device and determines the CSI based on the downlink reference signal. The terminal then feeds back compressed CSI to the access network device. The access network device decompresses the compressed CSI and recovers downlink channel information from the decompressed CSI. Furthermore, the access network device can perform operations such as precoding on the downlink data based on the recovered downlink channel information, thereby improving downlink data transmission quality.

[0106] AI feedback mode: The terminal measures the downlink reference signal to determine downlink channel information, which it then inputs into the AI ​​compression model. The output of this model is compressed CSI. The terminal then feeds back the compressed CSI to the access network device, which then inputs the received compressed CSI into the CSI decompression model. The output of this CSI decompression model is recovered downlink channel information. Furthermore, the access network device performs operations such as precoding the downlink data based on the recovered downlink channel information.

[0107] Prediction-based feedback mode: Access network equipment uses algorithms such as autoregressive models and Kalman filters to predict channel information. Furthermore, the access network equipment can modify the predicted channel information based on the channel information reported by the terminal.

[0108] For example, the corresponding relationship between feedback mode and index is shown in Table 1.

[0109] Table 1

[0110] It is understandable that the correspondence between the feedback mode and the index can be preset, such as specified by the protocol, or configured to the terminal by the access network device, for example, the access network device configures the correspondence between the feedback mode and the index to the terminal through radio resource control (RRC) signaling.

[0111] 2. Indication of spatial information.

[0112] The spatial information is represented by reference points of an electromagnetic map, leaf nodes of a K-ary tree, or reference points of a geographic map.

[0113] a) Reference points of electromagnetic maps

[0114] For example, the correspondence between the spatial information indicated by the access network device to the terminal and the feedback mode includes the correspondence between the reference point of the electromagnetic map and the feedback mode, which can be expressed as: [reference point of the electromagnetic map, feedback mode]. Optionally, the reference point of the electromagnetic map can be specifically represented by the coordinates of the reference point of the electromagnetic map, or the index of the reference point.

[0115] In one possible implementation, the access network device uses a bitmap to indicate the correspondence between reference points in the electromagnetic map and feedback modes. For example, if the electromagnetic map includes five reference points, these five reference points can be represented by a 5-bit bitmap. The correspondence between the reference points and feedback modes indicated to the terminal by the access network device is [01100, feedback mode 1], [10000, feedback mode 2], [00011, feedback mode 3], indicating that reference points 3 and 4 correspond to feedback mode 1, reference point 5 corresponds to feedback mode 2, and reference points 1 and 2 correspond to mode 3.

[0116] As shown in Figure 4, the access network device sends the correspondence between reference points and feedback modes on the electromagnetic map to the terminal. Reference points can be indicated using coordinates, indexes, or bitmaps. In Figure 4, there are three feedback modes, designated 1, 2, and 3. The access network device indicates the correspondence between reference points and feedback modes to the terminal, centered on its own geographic location.

[0117] In Figure 4, the boxes vary in size. It should be understood that the smallest-granularity box in Figure 4 represents the area corresponding to a single reference point. A larger-granularity box can include multiple smaller-granularity boxes. In other words, a larger-granularity box encompasses multiple reference points. Because these multiple reference points correspond to the same feedback mode and are adjacent, they are represented by a larger-granularity box.

[0118] For example, the terminal determines a matching reference point in the electromagnetic map based on its location information. For example, when the terminal is within the coverage area of ​​a reference point, the terminal is considered to match the reference point. Alternatively, when the distance between the terminal and the center of a reference point is less than a threshold, the terminal is considered to match the reference point. Based on the correspondence between the reference point and the feedback pattern, the terminal determines the feedback pattern corresponding to the matching reference point. Based on the matching feedback pattern, the terminal provides first information feedback to the access network device. It is understood that the terminal can obtain an electromagnetic map. Methods for obtaining the electromagnetic map include, but are not limited to, the access network device sending the electromagnetic map to the terminal and the terminal receiving the electromagnetic map from the access network device. The access network device may be the access network device in steps 310 and 320 in Figure 3. Alternatively, multiple access network devices send electromagnetic maps to the terminal, and the terminal determines the electromagnetic map in the embodiment of the present application based on the electromagnetic maps sent by the multiple access network devices. For example, each of the multiple access network devices sends a portion of the electromagnetic map to the terminal, and the terminal combines the electromagnetic maps sent by the multiple access network devices to determine the electromagnetic map in the embodiment of the present application. Alternatively, the terminal may obtain the electromagnetic map in a D2D manner, for example, other terminals send electromagnetic maps to the terminal, and the terminal receives electromagnetic maps from other terminals.

[0119] b) K-ary tree leaf node

[0120] For example, a K-ary tree includes at least two layers, where the nodes in the first layer are root nodes, and the nodes in the last layer are leaf nodes. Optionally, if additional layers are included in addition to the first and last layers, the nodes in the additional layers are called intermediate nodes. Taking a quadtree as an example, each node in a quadtree corresponds to four child nodes. For example, as shown in Figure 5, the quadtree includes three layers. The node in the first layer is called the root node, which corresponds to four child nodes. The second layer includes four intermediate nodes. Intermediate nodes 1 and 3 correspond to different feedback modes, so the key information corresponding to intermediate nodes 1 and 3 is a "special value," for example, -1. Furthermore, the access network device indicates the feedback modes corresponding to the four child nodes under intermediate node 1: feedback mode 1, feedback mode 3, feedback mode 2, and feedback mode 1. The access network device indicates the feedback modes corresponding to the first and fourth child nodes under intermediate node 3: feedback mode 3 and feedback mode 1, respectively. Optionally, when the subnodes under an intermediate node have different feedback modes, the access network device indicates the subnodes of the feedback mode indicated by the access network device to the terminal. For example, for intermediate node 1, the access network device indicates 1111 to the terminal, indicating that the access network device indicates the feedback modes of the four subnodes corresponding to intermediate node 1. For intermediate node 3, the access network device indicates 1001 to the terminal, indicating that the access network device indicates the feedback modes of subnodes 1 and 4 corresponding to intermediate node 3. Optionally, if the access network device does not indicate the corresponding feedback mode for subnodes 2 and 3 under intermediate node 3, when the terminal is within the coverage area of ​​subnodes 2 and 3, the terminal may not feedback channel information to the access network device, or the terminal may feedback channel information to the access network device based on its own rules. Intermediate nodes 2 and 4 have the same feedback mode, so the access network device may indicate the corresponding feedback modes of intermediate nodes 2 and 4 to the terminal: feedback mode 2 and feedback mode 3, respectively.

[0121] In one possible implementation, the access network device may use [the topological structure of the leaf nodes, the key-value information] to indicate the correspondence between the spatial information and the feedback mode. Among them, the topological structure of the leaf nodes represents the spatial information, and the key-value information represents the feedback mode. For example, the geographical location corresponding to the root node can be obtained by both the access network device and the terminal. For example, the geographical location corresponding to the root node can be predetermined, or configured to the terminal by the access network device, without limitation. At the same time, since it is a quadtree, the access network device can send the key-value information of the four nodes under the root node to the terminal. For example, the key-value information corresponding to the intermediate node 1 is -1, which indicates that the feedback modes of the four child nodes corresponding to the intermediate node 1 are different, and the access network device continues to indicate the feedback modes corresponding to its four child nodes to the terminal. For another example, the key-value information corresponding to the intermediate node 2 is 2, which indicates that the intermediate node 2 corresponds to feedback mode 2.

[0122] For example, the terminal determines the geographic location corresponding to each node based on the geographic location of the root node and the K-ary tree. The terminal then determines matching nodes based on the terminal's location information. For example, when the terminal is within the coverage area of ​​a node, the terminal is considered to match the node. Alternatively, when the distance between the terminal and a node is less than a threshold, the terminal is considered to match the node. Based on the correspondence between the node and the feedback mode, the terminal determines the feedback mode corresponding to the matching node; and based on the corresponding feedback mode, the terminal feeds back the first information to the access network device.

[0123] 3) Reference points on geographical maps

[0124] The access network device can be centered at a certain location and divided into several geographical areas, each of which corresponds to a reference point. The access network device can indicate to the terminal the correspondence between spatial information and feedback patterns, specifically the correspondence between reference points on a geographical map and feedback patterns.

[0125] For example, the terminal determines its matching reference point based on its location information. For example, when the terminal is within the coverage area of ​​the geographic area corresponding to a reference point, the terminal is considered to match the reference point. Alternatively, when the distance between the terminal and the center of a reference point is less than a threshold, the terminal is considered to match the reference point. The terminal determines the feedback mode corresponding to the reference point matched by the terminal based on the correspondence between the reference points and the feedback modes on the geographic map; the terminal feeds back the first information to the access network device based on the corresponding feedback mode.

[0126] It is understood that the terminal includes a radio frequency module (component) and a processing module (component). For example, the processing module includes a chip, such as a system on chip (SoC); the radio frequency module may include a radio frequency front end or a radio frequency front end module. The radio frequency module receives information indicating the correspondence between spatial information and feedback mode from the access network device via the air interface. The processing module obtains information indicating the correspondence between spatial information and feedback mode via the radio frequency module. In step 310, "receiving information indicating the correspondence between spatial information and feedback mode from the access network device" can be replaced with "obtaining information indicating the correspondence between spatial information and feedback mode." For example, the processing module of the terminal obtains information indicating the correspondence between spatial information and feedback mode, which can be understood as: the processing module of the terminal obtains information corresponding to the information indicating the correspondence between spatial information and feedback mode via an input / output (I / O) interface. For another example, the radio frequency module of the terminal obtains information indicating the correspondence between spatial information and feedback mode, which can be understood as: the radio frequency module of the terminal receives information indicating the correspondence between spatial information and feedback mode from the access network device.

[0127] Step 320: The terminal sends first information to the access network device, and the access network device receives the first information from the terminal.

[0128] For example, the first information is determined based on a first feedback mode, which is determined based on a correspondence between spatial information and the feedback mode and the terminal's location information. For example, after obtaining the correspondence between the spatial information and the feedback mode, the terminal may: determine the first spatial information based on the terminal's location information; determine the first feedback mode corresponding to the first spatial information based on the correspondence between the spatial information and the feedback mode; and determine the first information based on the first feedback mode. The specific information included in the first information depends on the first feedback mode. Under different feedback modes, the first information fed back by the terminal to the access network device may vary.

[0129] It is understood that, in the description of this application, "send" can be replaced with "feedback." For example, "a terminal sends first information to an access network device" can be replaced with "the terminal feeds back the first information to the access network device." In one possible implementation, in step 320, the terminal's radio frequency module can send the first information to the access network device via an air interface. For example, the terminal's processing module outputs the first information to the radio frequency module via an I / O interface, and the terminal's radio frequency module then sends the first information to the access network device via the air interface.

[0130] When the spatial information is represented by reference points in the electromagnetic map, the correspondence between the electromagnetic map, the spatial information and the feedback mode can be fused and sent:

[0131] The terminal obtains the indication information of the correspondence between the spatial information and the feedback mode, including: the terminal obtains an electromagnetic map, the electromagnetic map including the indication information of the correspondence between the reference point and the feedback mode. For example, the access network device can send the electromagnetic map to the terminal in a unicast, multicast or broadcast manner.

[0132] 1. Each reference point in the electromagnetic map corresponds to a feedback mode. For example, the electromagnetic map includes multipath information for N reference points and the corresponding feedback mode. For example, reference point l in the electromagnetic map is represented as: It indicates that the reference point l corresponds to the feedback mode F l It is understandable that when a reference point in the electromagnetic map is not configured with a corresponding feedback mode, the feedback mode corresponding to the reference point may be defaulted.

[0133] 2. Multiple reference points in the electromagnetic map correspond to a feedback mode. For example, the electromagnetic map sent by the access network device to the terminal is represented as: It indicates that the feedback mode from reference point 1 to a in the electromagnetic map is F1, and the feedback mode from reference point a+1 to reference point b is F2.

[0134] Alternatively, the feedback mode F i , which is connected in series after the electromagnetic map. For example, the electromagnetic map sent by the access network device to the terminal is: This requires additional determination of the correspondence between N reference points and K feedback modes. The correspondence between N reference points and K feedback modes can be predefined or configured by the access network device for the terminal, without limitation. The advantage is that the correspondence between reference points and feedback modes can be flexibly configured.

[0135] By adopting the above-mentioned electromagnetic map, spatial information and feedback mode corresponding relationship fusion sending method, the access network device does not need to additionally indicate F to the terminal. i The spatial information in the i The corresponding feedback mode can be used.

[0136] Alternatively, the access network device may independently indicate the electromagnetic map and the correspondence between the spatial information and the feedback mode to the terminal. The manner in which the access network device sends the electromagnetic map to the terminal will not be described in detail. The key point is the manner in which the access network device sends the correspondence between the spatial information and the feedback mode to the terminal:

[0137] 1. Periodicity: The terminal and the access network device agree in advance on a period T for sending the correspondence between spatial information and feedback mode. The access network device sends the correspondence between spatial information and feedback mode to the terminal according to the period T.

[0138] 2. Aperiodic: The access network device may aperiodically send the correspondence between spatial information and feedback mode to the terminal. For example, when the access network device receives activation signaling from the upper layer, it sends the correspondence between spatial information and feedback mode to the terminal.

[0139] It should be understood that the above description uses the example of one or more reference points in an electromagnetic map corresponding to one feedback mode. The correspondence between the spatial information indicated by the access network device to the terminal and the feedback mode can also be tied to a reference point, which can be a reference point in the electromagnetic map or a reference point on a geographic map. For example, with the reference point as the center, the access network device can indicate the feedback mode corresponding to each sub-reference point within the coverage area corresponding to the reference point.

[0140] For example, for reference point 1, the access network device sends a feedback mode map F to the terminal. l , the feedback pattern map F l The correspondence between K spatial information and feedback modes is included, for example, the feedback mode map F l Expressed as: F l:{{spatial information 1, feedback mode},…,{spatial information K, feedback mode}}.

[0141] For example, as shown in FIG6 , for a reference point l in the electromagnetic map, the access network device feeds back a feedback mode map F for the reference point l to the terminal. l For example, for reference point 1, the area corresponding to reference point 1 can be divided into multiple sub-reference points, and one or more sub-reference points correspond to one feedback mode. In Figure 6, the numbers "1", "2", and "3" are used to represent feedback modes 1, 2, and 3.

[0142] It is understood that in Figure 6, the smallest granularity box represents a sub-reference point, and a large granularity box includes multiple small granularity boxes. If the feedback modes corresponding to multiple sub-reference points are the same and the areas of the multiple sub-reference points are adjacent, the boxes corresponding to the multiple reference points form a large granularity box.

[0143] In an embodiment of the present application, the access network device may transmit a complete electromagnetic map to the terminal. Alternatively, when the terminal's range of movement is small or the area of ​​the reference points is large, the access network device may only send the electromagnetic map of some reference points to the terminal, thereby reducing the wireless resource overhead of transmitting the electromagnetic map. Alternatively, in another possible implementation, in the correspondence between spatial information and feedback modes, some feedback modes are related to the electromagnetic map, that is, when the terminal uses this feedback mode to feedback the first information, it needs to use the electromagnetic map; while some feedback modes are not related to the electromagnetic map, that is, when the terminal uses this feedback mode to feedback the first information, it does not need to use the electromagnetic map. In an embodiment of the present application, when a certain feedback mode is related to the electromagnetic map when feeding back the first information: assuming that the feedback mode is the first feedback mode, the access network device may send the electromagnetic map of the first spatial information corresponding to the first feedback mode to the terminal; for a certain feedback mode is not related to the electromagnetic map when feeding back the first information: assuming that the feedback mode is the second feedback mode, the access network device no longer sends the electromagnetic map of the second spatial information corresponding to the second feedback mode to the terminal. Through the above, the access network device sends the electromagnetic map of partial spatial information to the terminal without sending the complete electromagnetic map, thereby reducing the wireless resource overhead of transmitting the electromagnetic map.

[0144] [Example 2]

[0145] The terminal can collect accuracy information of the terminal feedback channel information in different feedback modes. The access device can determine the correspondence between the spatial information and the feedback mode based on the information fed back by the terminal.

[0146] For example, the terminal may send second information to the access network device, where the second information is accuracy information of channel information fed back by the terminal in different feedback modes. The accuracy information of the channel information is used to determine the correspondence between the spatial information and the feedback mode. Optionally, feeding back the accuracy information of the channel information in different feedback modes includes: accuracy information of the channel information fed back by the terminal at different locations and / or at different times in different feedback modes.

[0147] In one possible implementation, the terminal may collect accuracy information of the channel information fed back by the terminal to the access network device in different feedback modes. For example, the terminal may determine the first information fed back by the terminal in different feedback modes; the terminal may reconstruct the channel based on the first information; the terminal may determine the local channel based on the downlink reference signal; and the terminal may determine the difference between the reconstructed channel and the local channel. It is understandable that the smaller the difference between the reconstructed channel and the local channel, the higher the accuracy of the first information fed back using the current feedback mode; otherwise, the lower the accuracy. In the following example, the difference between the reconstructed channel and the local channel is used as an example to represent the accuracy information of the channel information fed back by the access network device. The difference between the reconstructed channel and the local channel may be referred to as the difference information. For example, when the terminal is in position 1, it determines that the difference information corresponding to the type II CSI feedback mode is 0.85, the difference information corresponding to the feedback mode of the calibration multipath information is 0.91, and the difference information corresponding to the AI ​​feedback mode is 0.92. The second information fed back by the terminal to the access network device can be expressed as: {(terminal position), {type II CSI feedback mode: 0.85}, {feedback calibration multipath information mode: 0.91}, {AI feedback mode: 0.92}}. For example, the terminal position can be expressed by the longitude and latitude coordinates of the terminal, for example, expressed as [longitude coordinate, longitude coordinate].

[0148] Alternatively, the terminal may collect accuracy information of the channel information fed back by the terminal to the access network device at different times. For example, the time may be a time slot, and the second information fed back by the terminal to the access network device may be expressed as: {UE position, {difference information of time slot feedback mode 1 t1, difference information of time slot feedback mode 1 t2, ...}}, etc. For example, for a CSI feedback mode of type II, the second information fed back by the terminal to the access network device may be expressed as: {(terminal position), {CSI feedback of type II: 0.85, 0.83, 0.87, ...}}. Optionally, the second information also includes: indication information of the time slot, such as the time slot number. Alternatively, when the second information does not include indication information of the time slot, the access network device may infer the time corresponding to the multiple accuracy information included in the second information based on the time of receiving the second information.

[0149] Alternatively, the terminal may collect accuracy information of the channel information fed back to the access network device at different locations. For example, the second information fed back by the terminal to the access network device may be represented as: {{terminal location 1, {difference information of feedback mode 1}, …}, {terminal location 2, {difference information of feedback mode 2}, …}, …}.

[0150] It is understood that the terminal can combine at least two of the following: difference information from different feedback modes, difference information from different times, or difference information from different locations, and feed the second information back to the access network device. For example, as shown in Figure 7, the terminal is mobile, and its geographical location changes as the terminal moves. In time slot 1, the terminal is at location 1, and the terminal collects three feedback modes. In time slot 2, the terminal is at location 2, and the terminal collects five feedback modes; in time slot 3, the terminal is at location 3, and the terminal collects two feedback modes; in time slot 4, the terminal is at location 4, and the terminal collects one feedback mode. The terminal obtains the accuracy information corresponding to these 11 feedback modes, combines the accuracy information corresponding to these 11 feedback modes, generates the second information, and reports it to the access network device. Optionally, the 11 feedback modes can be the same or different, without limitation.

[0151] In one possible implementation, the terminal may periodically report the second information to the access network device. For example, the terminal may report the second information to the access network device at intervals of period T. Alternatively, the terminal may report the second information to the access network device aperiodically. For example, during the connection between the terminal and the access network device, the terminal may report the second information to the access network device when it receives activation signaling or when certain conditions are met. For example, the condition may include when the difference information collected by the terminal is greater than or equal to a threshold.

[0152] Optionally, the terminal may compress the second information and feed the compressed second information back to the access network device. For example, the compression method may include fixed-length compression. For example, when the amount of difference information collected by the terminal reaches a fixed value, the fixed-length compression method may be used to compress the fixed value of difference information. Alternatively, the terminal may perform variable-length compression or other compression methods such as entropy compression on the second information. In this case, the terminal needs to indicate the length of the compressed second information to the access network device.

[0153] Optionally, the second information can be transmitted bundled with the first information. For example, the second information can be transmitted in series after the first information, as shown in Figure 8. Optionally, if the first information includes the terminal's location, for example, in a mode where the first information fed back includes the terminal's location information, the terminal's location information may not be fed back in the second information. Optionally, if the feedback mode in the second information is the same as the feedback mode corresponding to the first information, the feedback mode identifier may not be included in the second information.

[0154] After receiving the second information, the access network device may determine the correspondence between the spatial information and the feedback mode based on the second information. For example, after receiving the second information, the access network device may determine the correspondence between the spatial information and the feedback mode based on a classification algorithm. For example, classification algorithms include: machine learning statistical discrimination (e.g., decision tree, SVM algorithm), clustering (K-means, DBSCAN, etc.), and deep learning (DL) (e.g., neural network-based classification). The correspondence between the spatial information and the feedback mode determined based on the classification algorithm is shown in a of FIG9 . Alternatively, after receiving the second information, the access network device may determine the correspondence between the spatial information and the feedback mode based on regional division. For example, the access network device may divide a geographic map into different regions, each region may correspond to a reference point, and the access network device may determine a preferred feedback mode corresponding to a geographic region and establish a correspondence between the reference point corresponding to the geographic region and the feedback mode. Alternatively, the access network device may determine a preferred feedback mode corresponding to the region corresponding to a reference point in an electromagnetic map and determine a correspondence between the reference point and the preferred feedback mode. Alternatively, the access network device may determine a preferred feedback mode corresponding to the region corresponding to the node in the K-ary tree, and establish a correspondence between the node and the preferred feedback mode. Based on the region division, the correspondence between the spatial information and the feedback mode determined may be shown in b in FIG9 . In one possible implementation, the difference information of the feedback mode includes: the cosine similarity between the reconstructed channel corresponding to the feedback mode and the local channel. For example, for a piece of spatial information, the terminal reports the cosine similarity of two feedback modes. If the feedback bits (i.e., the bits of the first information) corresponding to the two feedback modes are the same, the access network device selects the feedback mode with the better cosine similarity and establishes a correspondence between the feedback mode and the spatial information. Alternatively, the difference information of the feedback mode includes the normalized mean squared error (NMSE) between the reconstructed channel corresponding to the feedback mode and the local channel. For example, for a piece of spatial information, the terminal reports the NMSE of two feedback modes. If the feedback bits corresponding to the two feedback modes are the same, the access network device preferentially selects the feedback mode with the smaller NMSE and establishes a correspondence between the feedback mode and the spatial information.

[0155] [Example 3]

[0156] The access network device may update the "correspondence between spatial information and feedback mode." For example, the access network device may send third information to the terminal, and the terminal may obtain the third information. The third information is used to update the correspondence between spatial information and feedback mode. For example, the spatial information and feedback mode indicated to the terminal by the access network device in step 310 in FIG. 3 may be updated.

[0157] For example, the access network device may update the correspondence between the spatial information and the feedback mode indicated to the terminal based on the received second information or an upper layer instruction, where the update includes at least one of the following: addition, deletion, or replacement. For example, updating the correspondence between the spatial information and the feedback mode includes at least one of the following: deletion of one or more feedback modes corresponding to the spatial information, replacement of one or more feedback modes corresponding to the spatial information, or addition of one or more feedback modes corresponding to the spatial information.

[0158] 1. Update by electromagnetic map or geographic map:

[0159] a. The access network equipment is updated according to a reference point, which may be a reference point in an electromagnetic map or a reference point in a geographical map.

[0160] For example, the access network device may indicate to the terminal the correspondence between the spatial information to be updated and the feedback mode. When one piece of spatial information corresponds to one feedback mode, the correspondence between the spatial information to be updated and the feedback mode indicated by the access network device to the terminal may be expressed as: {spatial information 1, feedback mode}, {spatial information 2, feedback mode}. After receiving the update information, the terminal updates the feedback modes corresponding to spatial information 1 and spatial information 2 in accordance with the instructions. Alternatively, when one piece of spatial information corresponds to multiple feedback modes, the correspondence between the spatial information to be updated and the feedback mode indicated by the access network device to the terminal may be expressed as: {{spatial information 1, spatial information 2}, feedback mode}, {{spatial information 3, spatial information 4}, feedback mode}. After receiving the update information, the terminal updates spatial information 1 and spatial information 2 to the corresponding feedback modes, and updates spatial information 3 and spatial information 4 to the corresponding feedback modes in accordance with the instructions.

[0161] It will be appreciated that the spatial information can be represented using coordinates of reference points in an electromagnetic map or geographic map, or an index, etc. Alternatively, the access network device can update the correspondence between the spatial information and the feedback mode using a bitmap, without limitation. Regarding indicating the correspondence between the spatial information and the feedback mode using a location-based approach, please refer to the previous description.

[0162] b. Access network equipment is updated according to regions.

[0163] For example, the correspondence between the spatial information to be updated and the feedback mode indicated by the access network device to the terminal can be expressed as {region 1, feedback mode}. The terminal then updates the feedback mode corresponding to region 1 according to the instruction of the access network device. Alternatively, it can be expressed as {{region 1, region 2}, feedback mode}. In this case, the terminal updates the feedback modes corresponding to regions 1 and 2 according to the instruction of the access network device.

[0164] Optionally, a region refers to a connected entire area. For example, the access network device may indicate a region to a terminal using the following format: {center of circle, radius}. Based on the center and radius, the terminal may determine a circular region, and all reference points covered by the circular region may be updated to the feedback mode corresponding to the region. Alternatively, the access network device may indicate a region to a terminal using the following format: {center of a cuboid, length, width, and height}. Based on the center and length, width, and height of the cuboid, the terminal may determine a cuboid, and all reference points covered by the cuboid may be updated to the feedback mode corresponding to the region.

[0165] As shown in Figure 10a, it shows the correspondence between spatial information and feedback modes. The boxes represent the areas corresponding to the spatial information, and the numbers in the boxes indicate the feedback modes corresponding to the spatial information. For example, if the number in the box is 3, it means that the spatial information corresponding to the box has a feedback mode of 3. If the number in a box is 0, it means that the spatial information corresponding to the box has not been configured with a feedback mode. The access network device can add the correspondence between spatial information and feedback modes in Figure 10a. For example, as shown in Figure 10b, the access network device adds the corresponding feedback modes of 2, 3, 3, and 2 for several pieces of spatial information that have not been configured with feedback modes, respectively. The access network device can also change the correspondence between spatial information and feedback modes. As shown in Figure 10c, if a piece of spatial information corresponds to feedback mode 2, the access network device can change the corresponding feedback mode of the spatial information to 3. The access network device can also delete the correspondence between spatial information and feedback modes. As shown in Figure 10d, if a piece of spatial information corresponds to feedback mode 3, the access network device can delete the corresponding feedback mode of the spatial information.

[0166] 2. Update according to K-ary tree

[0167] As previously explained, in a K-ary tree structure, the correspondence between spatial information and feedback patterns can be expressed as [leaf node index, key value information]. Since operations such as adding, updating, and deleting only involve changes to the feedback pattern, access network devices can simply modify the key value information corresponding to the leaf node index.

[0168] It is understandable that in the above description, "adding a feedback mode corresponding to spatial information" includes: adding a correspondence between spatial information and a feedback mode. For example, if a certain spatial information has not been configured with a feedback mode before, the corresponding feedback mode can be configured for the spatial information during the update process. "Or, adding a feedback mode corresponding to spatial information" can also be understood as: dividing a spatial information into multiple subspaces, and adding a correspondence between the multiple subspaces and the feedback mode. It is understandable that the subspace divided into multiple subspace information may have a corresponding feedback mode before, or may not have been configured with a corresponding feedback mode, etc., without limitation. In the description of this process, the degree of refinement of the spatial information is refined, thereby increasing the accuracy of the correspondence between the spatial information and the feedback mode.

[0169] For example, the access network device may refine the correspondence between the spatial information and the feedback mode according to the second information reported by the terminal or an upper-layer instruction.

[0170] 1. Refine the correspondence between spatial information and feedback mode according to the reference point.

[0171] a. The access network device indicates to the terminal the identifier of the reference point to be added. Upon receiving the identifier, the terminal can split the area corresponding to the reference point into multiple sub-areas. The reference point can be a reference point on an electromagnetic map or a reference point on a geographic map.

[0172] For example, the correspondence between the newly added spatial information and the feedback mode indicated by the access network device to the terminal may be {reference point 1, feedback mode 2, feedback mode 3, and feedback mode 4}. When the terminal receives the indication information, it may divide the area corresponding to the reference point into three sub-areas, whose corresponding feedback modes are feedback modes 2, 3, and 4, respectively. Furthermore, the access network device may indicate the correspondence between the sub-areas and the feedback modes to the terminal. Alternatively, the correspondence between the sub-areas and the feedback modes may be predefined, and the terminal may determine the correspondence between the feedback mode and the sub-area according to the predefined rules. Furthermore, the access network device may indicate the space corresponding to each sub-area to the terminal. For example, the space corresponding to each sub-area may be expressed in the form of {center of a circle, radius}, or {center of a cuboid, length, width, and height}. Alternatively, the terminal may divide the area corresponding to the reference point into a corresponding number of sub-areas according to a predefined method.

[0173] 2. Refine the correspondence between spatial information and feedback mode according to the K-ary tree.

[0174] The access network device indicates to the terminal the identifier of the node to be added, as well as information corresponding to the node. For example, the information corresponding to the node includes: the newly added spatial information of the node and the feedback mode corresponding to the spatial information. For example, the feedback mode can be represented by a key value, and the spatial information can be represented by the node identifier.

[0175] In one possible implementation, Figure 11 shows a schematic diagram of the correspondence between newly added spatial information for nodes in a quadtree and feedback modes. Initially, the access network device indicates three regions to the terminal, with feedback modes 1, 2, and 3 for these regions, respectively. The quadtree is now called initial tree 0. During the first increment, the access network device indicates to the terminal that feedback mode 3 corresponds to the second region, and that the fourth region is subdivided. For example, the fourth region is further divided into four subregions, with corresponding feedback modes 1, 3, 2, and 1, respectively. The quadtree is now called incremental tree 1. During the second increment, the access network device subdivides the first and third regions to the terminal, and further subdivides the fourth region. The quadtree is now called incremental tree 2. For example, in the second increment, the first region is subdivided into four subregions, with the feedback mode corresponding to the first and fourth subregions both being 1. Subregions 2 and 3 are not configured with a feedback mode, and their corresponding feedback mode can be 0. The second region is subdivided into four subregions. The feedback modes for the first, second, and fourth sub-areas are 3, 2, and 1, respectively. The third sub-area is not configured with a feedback mode, and its corresponding feedback mode is 0. The fourth area is divided into four sub-areas, of which the feedback mode for the fourth sub-area is 1. Sub-areas 1 through 3 are not configured with a feedback mode, and their corresponding feedback modes are 0.

[0176] This design allows access network equipment to flexibly update the mapping between spatial information and feedback modes, allowing terminals to adopt the optimal feedback mode for transmitting channel information in the corresponding space. Furthermore, based on the accuracy of different feedback modes reported by terminals, access network equipment can further refine the mapping between spatial information and feedback modes, improving their precision.

[0177] [Example 4]

[0178] The embodiment of the present application also provides a process, as shown in FIG12 , including:

[0179] Step 1200: Pre-interaction process between the terminal and the access network device. This pre-interaction process can be initiated by the terminal or the access network device, without limitation. During the pre-interaction process, the terminal and the access network device can exchange the following information:

[0180] a) Activate feedback of first information, ie, channel information, based on the correspondence between the spatial information and the feedback mode.

[0181] Feedback of the first information based on the correspondence between spatial information and feedback modes can also be referred to as feedback of the first information based on a feedback mode map. It is understood that the feedback mode map includes the correspondence between spatial information and feedback modes. For example, when the terminal receives the activation indication, the terminal feeds back the first information to the access network device according to the method in the embodiment of the present application; otherwise, the terminal independently determines the method for feeding back channel information to the access network device.

[0182] b) The process of issuing the correspondence between activation space information and feedback mode.

[0183] It is understood that the downlink process of the correspondence between the spatial information and the feedback mode can be referred to as the downlink process of the feedback mode map. For example, when the terminal receives the activation, the terminal receives the feedback mode map from the access network device and obtains the correspondence between the spatial information and the feedback mode in the feedback mode map.

[0184] c) Activating the terminal to adopt the accuracy information of the feedback mode and reporting the second information to the access network device.

[0185] This activation process is optional. When the terminal receives the activation, it may collect accuracy information corresponding to different feedback modes and report the second information including the accuracy information to the access network device. Alternatively, if the terminal does not receive the activation, the terminal will no longer collect accuracy information corresponding to different feedback modes and will no longer report the second information to the terminal.

[0186] d) The terminal or access network device negotiates at least one of the following information:

[0187] The method of indicating spatial information, for example, indicating spatial information through reference points in an electromagnetic map or geographic map, or indicating spatial information through nodes in a K-ary tree, the correspondence between feedback mode and identifier, or whether the indication of spatial information and feedback mode is bound together with the reference points in the electromagnetic map.

[0188] e) How to determine the difference between the reconstructed channel and the local channel

[0189] For example, the access network device and the terminal may agree on a method for determining the difference between the reconstructed channel and the local channel. For example, the cosine similarity function and NMSE may be used to measure the difference between the two.

[0190] It is understandable that, in the above-mentioned pre-interaction process, the information negotiated between the terminal and the access network device can also be pre-defined. Therefore, the terminal and the access network device do not need to negotiate again. Therefore, step 1200 is optional.

[0191] Step 1210: The access network device sends the correspondence between the spatial information and the feedback mode and the electromagnetic map to the terminal.

[0192] For example, the correspondence between the electromagnetic map, spatial information, and feedback mode can be transmitted in a bundled manner, or the two can be transmitted independently. The specific transmission mode can be predefined, indicated by the access network device, or reported by the terminal.

[0193] Step 1220: The terminal determines a first feedback mode according to the correspondence between the spatial information and the feedback mode.

[0194] For example, the terminal determines matching spatial information based on the terminal's location, and the matching spatial information may be referred to as first spatial information. The feedback mode corresponding to the first spatial information determined by the terminal is referred to as the first feedback mode.

[0195] Step 1230: The terminal sends first information to the access network device according to the first feedback mode.

[0196] Optionally, the terminal can collect accuracy information about the first information at different time slots and locations, and can use different feedback modes to feedback the first information. The terminal then provides the access network device with second information including the accuracy information. Based on this second information, the access network device can determine the correspondence between the spatial information and the feedback mode, or update the determined spatial information and feedback mode. The first and second information can be transmitted bundled or independently, without limitation. For example, the transmission method of the first and second information can be based on protocol rules, instructed by the access network device, or reported by the terminal, without limitation.

[0197] Step 1240: The access network device sends the updated correspondence between the spatial information and the feedback mode to the terminal.

[0198] After receiving the correspondence between the updated spatial information and the feedback mode, the terminal can determine the spatial information that matches the terminal's location information based on the updated spatial information and the feedback mode, and further determine the matching feedback mode; and send the second information to the access network device based on the matching feedback mode.

[0199] Through the above design, the access network device indicates the correspondence between spatial information and feedback mode to the terminal. Based on the correspondence between spatial information and feedback mode, the terminal can quickly determine the corresponding feedback mode under different spatial information and use the determined feedback mode to send channel information to the access network device, thereby saving the terminal's computing resources and reducing the processing complexity on the terminal side.

[0200] It is understood that in the embodiments of the present application:

[0201] 1. In each process, the order of different steps is not limited. In addition, each process may include fewer steps or more steps than the flowchart or text description.

[0202] 2. In the embodiments of the present application, "(e.g., a terminal) receives information from (e.g., an access network device)" can be understood to mean that the source of the information is the access network device and the destination is the terminal, which may include the terminal directly or indirectly receiving information from the access network device. The information may undergo necessary processing between the source and destination, such as format changes, but the destination can still understand the valid information from the source. Similar expressions in this application should be understood similarly and will not be repeated here.

[0203] In the embodiments provided above, the methods provided in the embodiments of the present application are described from the perspective of the interaction between the terminal and the access network device. In order to implement the various functions in the methods provided in the embodiments of the present application, the terminal or access network device, etc., may include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the design constraints of the specific application of the technical solution.

[0204] Figures 13 and 14 are schematic diagrams of the structures of possible communication devices provided in embodiments of the present application. These communication devices can implement one or more corresponding functions in the above-mentioned method embodiments. For example, the functions implemented by the first communication device or the second communication device, etc., may thus achieve the beneficial effects possessed by the above-mentioned method embodiments. In embodiments of the present application, the communication device may be a terminal or an access network device, or the communication device may be a module (such as a chip) applied to a terminal or an access network device.

[0205] As shown in Figure 13, a communication device 1300 includes a processing unit 1310 and a transceiver unit 1320. The communication device 1300 is used to implement the functions of the terminal or access network device in the method embodiment of Figure 3 above.

[0206] Optionally, the transceiver unit 1320 may also be referred to as an output unit, an interface unit, or a communication unit. In one possible implementation, the transceiver unit 1320 includes at least one of a transmitting unit and a receiving unit. The transmitting unit and the receiving unit may be integrated together or may be two independent units.

[0207] When the communication device 1300 is used to implement the functions of the terminal in Figure 3, specifically: the transceiver unit 1320 is used to obtain indication information of the correspondence between spatial information and feedback mode, and the feedback mode includes a mode in which the first communication device feeds back channel information to the second communication device; the processing unit 1310 is used to generate first information; the transceiver unit 1320 is also used to feed back first information to the second communication device, and the first information is determined according to the first feedback mode, and the first feedback mode is determined according to the correspondence between the spatial information and the feedback mode and the position information of the first communication device.

[0208] In one possible implementation, the feedback mode includes an electromagnetic map-related feedback mode or an electromagnetic map-independent feedback mode. For example, the electromagnetic map-related feedback mode includes a mode for feeding back location information and a mode for feeding back calibration multipath information. The electromagnetic map-independent feedback mode includes a Type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

[0209] In one possible implementation, the transceiver unit 1320 is also used to: feedback second information to the second communication device, where the second information is accuracy information of the channel information fed back by the first terminal device under different feedback modes, and the accuracy information of the channel information is used to determine the correspondence between the spatial information and the feedback mode.

[0210] In a possible implementation, feeding back the accuracy information of the channel information in different feedback modes includes: in different feedback modes, the first communication device feeding back the accuracy information of the channel information at different locations and / or at different times.

[0211] In one possible implementation, the first feedback mode is determined based on the correspondence between the spatial information and the feedback mode and the location information of the first communication device, including: the first feedback mode is a feedback mode corresponding to the first spatial information, and the first spatial information is determined based on the location information of the first communication device.

[0212] In a possible implementation, the spatial information is represented by the following means: a reference point of an electromagnetic map, a K-ary tree leaf node, or a reference point of a geographic map.

[0213] In a possible implementation, when the spatial information is represented by reference points in the electromagnetic map, obtaining information indicating the correspondence between the spatial information and the feedback mode includes: obtaining an electromagnetic map, wherein the electromagnetic map includes information indicating the correspondence between the reference points and the feedback mode.

[0214] In a possible implementation, when the first feedback mode is associated with an electromagnetic map when feeding back the first information, the transceiver unit 1320 is further configured to: obtain the electromagnetic map of the first spatial information corresponding to the first feedback mode.

[0215] In a possible implementation, the transceiver unit 1320 is further configured to: obtain third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

[0216] In a possible implementation, updating the correspondence between the spatial information and the feedback mode includes at least one of the following: deleting one or more feedback modes corresponding to the spatial information, replacing one or more feedback modes corresponding to the spatial information, or adding one or more feedback modes corresponding to the spatial information.

[0217] In a possible implementation, adding a feedback mode corresponding to a new spatial information includes: adding a correspondence between a spatial information and a feedback mode, or dividing the spatial information into a plurality of subspace information and adding a correspondence between the plurality of subspaces and feedback modes.

[0218] When the communication device 1300 is used to implement the functions of the access network device in Figure 3, specifically: the processing unit 1310 is used to generate indication information of the correspondence between spatial information and feedback mode; the transceiver unit 1320 is used to send indication information of the correspondence between spatial information and feedback mode to the first communication device, and the feedback mode includes a mode in which the first communication device feeds back channel information to the second communication device; the transceiver unit 1320 is also used to receive first information from the first communication device, where the first information is determined according to the first feedback mode, and the first feedback mode is determined based on the correspondence between the spatial information and the feedback mode and the location information of the first communication device.

[0219] In one possible implementation, the feedback mode includes an electromagnetic map-related feedback mode or an electromagnetic map-independent feedback mode. Optionally, the electromagnetic map-related feedback mode includes a mode for feeding back location information and a mode for feeding back calibration multipath information. The electromagnetic map-independent feedback mode includes a Type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

[0220] In one possible implementation, the transceiver unit 1320 is further used to: receive second information from the first communication device, where the second information is accuracy information of the channel information fed back by the first terminal device under different feedback modes, and the accuracy information of the channel information is used to determine the correspondence between the spatial information and the feedback mode.

[0221] In a possible implementation, feeding back the accuracy information of the channel information in different feedback modes includes: in different feedback modes, the first communication device feeding back the accuracy information of the channel information at different locations and / or at different times.

[0222] In one possible implementation, the first feedback mode is determined based on the correspondence between the spatial information and the feedback mode and the location information of the first communication device, including: the first feedback mode is a feedback mode corresponding to the first spatial information, and the first spatial information is determined based on the location information of the first communication device.

[0223] In a possible implementation, the spatial information is represented by the following means: a reference point of an electromagnetic map, a K-ary tree leaf node, or a reference point of a geographic map.

[0224] In a possible implementation, when the spatial information is represented by reference points in the electromagnetic map, the information indicating the correspondence between the spatial information and the feedback mode is sent, including sending an electromagnetic map, wherein the electromagnetic map includes information indicating the correspondence between the reference points and the feedback mode.

[0225] In a possible implementation, when the first feedback mode is associated with an electromagnetic map when feeding back the first information, the transceiver unit 1320 is further configured to: send the electromagnetic map of the first spatial information corresponding to the first feedback mode.

[0226] In a possible implementation, the transceiver unit 1320 is further configured to: send third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

[0227] In a possible implementation, updating the correspondence between the spatial information and the feedback mode includes at least one of the following: deleting one or more feedback modes corresponding to the spatial information, replacing one or more feedback modes corresponding to the spatial information, or adding one or more feedback modes corresponding to the spatial information.

[0228] In a possible implementation, adding a feedback mode corresponding to a new spatial information includes: adding a correspondence between a spatial information and a feedback mode, or dividing the spatial information into a plurality of subspace information and adding a correspondence between the plurality of subspaces and feedback modes.

[0229] For a more detailed description of the processing unit 1310 and the transceiver unit 1320, reference may be made to the description in FIG3 of the above method embodiment, which will not be repeated here.

[0230] In one possible implementation, when the access network device adopts the O-RAN architecture, the processing unit 1310 may be located on the O-CU entity, and the transceiver unit 1320 may be located on the O-DU or O-RU entity. Optionally, when the O-CU entity includes an O-CU-CP entity and an O-CU-UP entity, the processing unit 1310 may be located on the O-CU-CP entity or the O-CU-UP entity. Alternatively, the processing unit 1310 is located on the O-DU entity, and the transceiver unit 1320 is located on the O-RU entity. Alternatively, both the processing unit 1310 and the transceiver unit 1320 are located on the O-DU entity or the O-RU entity, etc., without limitation.

[0231] It is understood that the division of units in the embodiments of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods. In addition, the various functional units in the embodiments of the present application can be integrated into a physical device (for example, a processor), or each functional unit can be a separate physical device, or two or more units can be integrated into a unit for implementation. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional modules.

[0232] As shown in Figure 14, the communication device 1400 includes a processing circuit 1410 and an interface circuit 1420. The processing circuit 1410 and the interface circuit 1420 are coupled to each other. It is understood that the processing circuit 1410 can be a processor, and the interface circuit 1420 can be a transceiver or an input / output interface.

[0233] Optionally, the communication device 1400 may further include a memory 1430 for storing instructions executed by the processing circuit 1410 or storing input data required for the processing circuit 1410 to run the instructions or storing data generated after the processing circuit 1410 runs the instructions.

[0234] Optionally, the memory (eg, 1430 ) in the embodiment of the present application may be integrated into the processing circuit (eg, 1410 ), or the memory (eg, 1430 ) and the processing circuit (eg, 1410 ) may be provided separately.

[0235] When the communication device 1400 is used to implement the method shown in FIG. 3 , the processing circuit 1410 is used to implement the functions of the processing unit 1310 , and the interface circuit 1420 is used to implement the functions of the transceiver unit 1320 .

[0236] When the communication device is a chip used in a terminal, the chip implements the terminal functions described in the method embodiments. The chip receives information sent by the access network device to the terminal through other modules in the terminal (such as a radio frequency module or antenna); alternatively, the chip sends information to other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the terminal to the access network device.

[0237] When the above-mentioned communication device is a module applied to an access network device, the module implements the functions of the access network device in the above-mentioned method embodiments. The module receives information from other modules in the access network device (such as a radio frequency module or antenna), and the information is sent by the terminal to the access network device; or the module sends information to other modules in the access network device (such as a radio frequency module or antenna), and the information is sent by the access network device to the terminal.

[0238] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0239] The memory in the embodiments of the present application can be a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium known in the art.

[0240] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC.

[0241] The embodiment of the present application further provides a communication device, which includes a processor and a memory, wherein the processor is configured to implement the functions of the access network device or terminal in FIG3. For example, the processor is configured to execute a computer program or instruction stored in the memory, wherein the memory is configured to store the computer program or instruction. When the computer program or instruction is executed, the method of the access network device or terminal in FIG3 is executed. Optionally, the processor and the memory are coupled.

[0242] An embodiment of the present application also provides a communication device, including a processor, which is used to implement the functions of the access network device or terminal in Figure 3.

[0243] The present application also provides a computer-readable storage medium storing instructions, which may also be referred to as computer programs, computer program codes, etc. The instructions are executed on a computer, causing the computer to perform the functions of the access network device or terminal in FIG. 3 of the above method embodiment.

[0244] An embodiment of the present application also provides a computer program product, including a computer program or instructions, wherein the computer program product includes a computer program or instructions for executing the method of the terminal in Figure 3, or the computer program product includes a computer program or instructions for executing the method of the access network device in Figure 3.

[0245] An embodiment of the present application also provides a chip, which includes a processor coupled to a memory, and the processor is used to execute computer programs or instructions stored in the memory, so that the functions of the access network device or terminal in Figure 3 are implemented.

[0246] The embodiment of the present application further provides a communication system, including a first communication device and a second communication device. The first communication device is used to implement the function of the terminal in FIG3 , and the second communication device is used to implement the function of the access network device in FIG3 .

[0247] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0248] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

Claims

1. A method for feedback channel information, characterized in that, The method is applied to a first communication device and includes: Obtaining indication information on the correspondence between spatial information and a feedback mode, where the feedback mode includes a mode in which the first communication device feeds back channel information to a second communication device; Feeding back first information to the second communication device, where the first information is determined according to a first feedback mode, and the first feedback mode is determined according to the correspondence between the spatial information and the feedback mode and the location information of the first communication device.

2. The method according to claim 1, wherein The feedback mode includes a feedback mode related to an electromagnetic map or a feedback mode unrelated to an electromagnetic map.

3. The method according to claim 2, wherein The feedback mode related to the electromagnetic map includes a mode of feeding back location information and a mode of feeding back calibrated multipath information.

4. The method according to claim 2, wherein The feedback mode unrelated to the electromagnetic map includes a type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

5. The method according to any one of claims 1 to 4, characterized in that, It further includes: Feeding back second information to the second communication device, where the second information is accuracy information of the first terminal device feeding back channel information in different feedback modes, and the accuracy information of the channel information is used to determine the correspondence between the spatial information and the feedback mode.

6. The method according to claim 5, wherein The accuracy information of feeding back channel information in different feedback modes includes: in different feedback modes, the first communication device feeds back the accuracy information of the channel information at different locations and / or different times.

7. The method according to any one of claims 1 to 6, characterized in that, The first feedback mode is determined according to the correspondence between the spatial information and the feedback mode and the location information of the first communication device, and includes: The first feedback mode is a feedback mode corresponding to first spatial information, and the first spatial information is determined according to the location information of the first communication device.

8. The method according to any one of claims 1 to 7, characterized in that, The spatial information is represented in the following ways: a reference point of an electromagnetic map, a leaf node of a K-ary tree, or a reference point of a geographical map.

9. The method according to claim 8, wherein When the spatial information is represented by the reference point in the electromagnetic map, the obtaining of the indication information on the correspondence between the spatial information and the feedback mode includes: obtaining an electromagnetic map, where the electromagnetic map includes the indication information on the correspondence between the reference point and the feedback mode.

10. The method according to any one of claims 1 to 9, characterized in that, When the first feedback mode is associated with the electromagnetic map when feeding back the first information, it further includes: Obtaining an electromagnetic map of the first spatial information corresponding to the first feedback mode.

11. The method according to any one of claims 1 to 10, characterized in that, It further includes: Obtaining third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

12. The method according to claim 11, wherein The updating of the correspondence between the spatial information and the feedback mode includes at least one of the following: deleting the feedback mode corresponding to one or more spatial information, replacing the feedback mode corresponding to one or more spatial information, or adding the feedback mode corresponding to one or more spatial information.

13. The method according to claim 12, wherein The adding of the feedback mode corresponding to one spatial information includes: adding a correspondence between one spatial information and a feedback mode, or dividing the spatial information into multiple sub-spatial information and adding the correspondences between the multiple sub-spaces and the feedback mode.

14. A method for feedback channel information, characterized in that, The method is applied to a second communication device and includes: Send indication information on the correspondence between spatial information and feedback modes to the first communication device, where the feedback modes include the mode in which the first communication device feeds back channel information to the second communication device; Receive first information from the first communication device, where the first information is determined according to a first feedback mode, and the first feedback mode is determined according to the correspondence between the spatial information and feedback modes and the location information of the first communication device.

15. The method according to claim 14, characterized in that, The feedback modes include feedback modes related to the electromagnetic map or feedback modes unrelated to the electromagnetic map.

16. The method according to claim 15, wherein The feedback modes related to the electromagnetic map include the mode of feeding back location information and the mode of feeding back calibrated multipath information.

17. The method according to claim 15, wherein The feedback modes unrelated to the electromagnetic map include the channel state information (CSI) feedback mode of type II, the feedback mode of artificial intelligence (AI), and the feedback mode based on prediction.

18. The method according to any one of claims 14 to 17, characterized in that It further includes: Receive second information from the first communication device, where the second information is the accuracy information of the first terminal device feeding back channel information in different feedback modes, and the accuracy information of the channel information is used to determine the correspondence between the spatial information and feedback modes.

19. The method according to claim 18, wherein, The accuracy information of feeding back channel information in different feedback modes includes: in different feedback modes, the accuracy information of the first communication device feeding back the channel information at different locations and / or different times.

20. The method according to any one of claims 14 to 19, characterized in that, The first feedback mode is determined according to the correspondence between the spatial information and feedback modes and the location information of the first communication device, and includes: The first feedback mode is the feedback mode corresponding to the first spatial information, and the first spatial information is determined according to the location information of the first communication device.

21. The method according to any one of claims 14 to 20, characterized in that, The spatial information is represented in the following ways: the reference point of the electromagnetic map, the leaf node of the K - ary tree, or the reference point of the geographical map.

22. The method according to claim 21, characterized in that, When the spatial information is represented by the reference point in the electromagnetic map, the indication information on the correspondence between the sent spatial information and feedback modes includes: sending the electromagnetic map, where the electromagnetic map includes the indication information on the correspondence between the reference point and feedback modes.

23. The method according to any one of claims 14 to 22, characterized in that, When the first feedback mode is associated with the electromagnetic map when feeding back the first information, it further includes: Sending the electromagnetic map of the first spatial information corresponding to the first feedback mode.

24. The method according to any one of claims 14 to 23, characterized in that, It further includes: Sending third information, where the third information is used to update the correspondence between the spatial information and feedback modes.

25. The method according to claim 24, wherein The update of the correspondence between the spatial information and feedback modes includes at least one of the following: deleting the feedback modes corresponding to one or more spatial information, replacing the feedback modes corresponding to one or more spatial information, or adding the feedback modes corresponding to one or more spatial information.

26. The method according to claim 25, wherein The addition of the feedback mode corresponding to one spatial information includes: adding the correspondence between one spatial information and the feedback mode, or dividing the spatial information into multiple sub - spatial information and adding the correspondences between the multiple sub - spaces and the feedback mode.

27. A communication device, characterized in that, It includes: A processor for executing computer programs or instructions stored in a memory, The memory for storing the computer programs or the instructions, When the computer program or the instructions are run, so that the method according to any one of claims 1 to 13 is executed, or so that the method according to any one of claims 14 to 26 is executed.

28. A computer-readable storage medium, characterized in that, Instructions are stored on the computer-readable storage medium, and the instructions run on a computer to cause the computer to execute the method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 26.

29. A computer program product, characterized in that, The computer program product includes a computer program or instructions for executing the method according to any one of claims 1 to 13, or the computer program product includes a computer program or instructions for executing the method according to any one of claims 14 to 26.

30. A communication system, characterized in that, Comprising: A first communication device, the first communication device being configured to execute the method according to any one of claims 1 to 13; A second communication device, the second communication device being configured to execute the method according to any one of claims 14 to 26.

Images