Method and device for feeding back channel information

Abstract

A method and apparatus for feeding back channel information, the method comprising: an access network device sending a feedback mode map to a terminal, the feedback mode map comprising a correspondence between different spaces and feedback modes; the terminal can match the corresponding space according to the geographical location information of the terminal, and feed back the channel information to the access network equipment according to the feedback mode corresponding to the space, so that the feedback efficiency of downlink data is improved, and the air interface overhead is reduced.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a method and apparatus for feedback channel information. Background Art

[0002] With the continuous development of wireless communication, the scenarios of wireless communication applications are becoming increasingly rich. For example, smart phones, vehicle-to-everything (V2X), or the Internet of Things (IoT), etc. While the number of terminals increases, the demand for communication quality also increases. It is expected that the next-generation wireless communication system will generate a large amount of air interface data, such as channel information. How terminals can efficiently feedback information to access network devices is a research direction. Summary of the Invention

[0003] Embodiments of this application provide a method and apparatus for feedback channel information, in order to reduce the transmission overhead caused by air interface data and improve the information feedback efficiency.

[0004] In a first aspect, a method for feedback information is provided. The method is applied to a first communication device and includes: obtaining indication information of a correspondence between spatial information and a feedback mode, where the feedback mode includes a mode in which the first communication device feedbacks channel information to a second communication device; and feedbacking 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.

[0005] Through the above design, taking the first communication device as a terminal and the second communication device as an access network device as an example: The access network device sends a feedback mode map to the terminal, and the feedback mode map includes the correspondence between different spaces and feedback modes. The terminal can match the corresponding space according to the geographical location information of the terminal, and feedback channel information to the access network device according to the feedback mode corresponding to the space, thereby improving the feedback efficiency of downlink data and reducing the air interface overhead.

[0006] In a possible implementation manner, the feedback mode includes a feedback mode related to an electromagnetic map or a feedback mode unrelated to an electromagnetic map. For example, the feedback mode related to the electromagnetic map includes a mode of feedbacking location information and a mode of feedbacking calibrated multipath information. 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.

[0007] In a possible implementation manner, it further includes: feedbacking second information to the second communication device, where the second information is the accuracy information of the first terminal device in feedbacking 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.

[0008] With 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.

[0009] In a possible implementation, the accuracy information of the feedback 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 positions and / or different times.

[0010] In a possible implementation, 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, including: 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.

[0011] In a possible implementation, 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.

[0012] In a possible implementation, when the spatial information is represented by the reference point in the electromagnetic map, the indication information for obtaining the correspondence between the spatial information and the feedback mode includes: obtaining the electromagnetic map, and the electromagnetic map includes the indication information of the correspondence between the reference point and the feedback mode.

[0013] With the above design, by adopting the above - mentioned method of fusing and transmitting the electromagnetic map and the correspondence between the spatial information and the feedback mode, the access network device does not need to additionally indicate the spatial information in the correspondence to the terminal, and only needs to indicate the feedback mode in the correspondence.

[0014] In a possible implementation, when the first feedback mode is associated with the electromagnetic map when feeding back the first information, it further includes: obtaining the electromagnetic map of the first spatial information corresponding to the first feedback mode.

[0015] With the above design, 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 rely on the electromagnetic map; 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 rely on the electromagnetic map. In the embodiments of the present application, when a certain feedback mode is related to the electromagnetic map when feedbacking the first information: assuming that this 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; when a certain feedback mode is not related to the electromagnetic map when feedbacking the first information: assuming that this 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, thus reducing the wireless resource overhead of transmitting the electromagnetic map.

[0016] In a possible implementation manner, it further includes: obtaining third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

[0017] Through the above design, the access network device can flexibly update the correspondence between the spatial information and the feedback mode, so that the terminal can adopt a better feedback mode to transmit channel information in the corresponding space. Further, through the accuracy information of different feedback modes reported by the terminal, the access network device can refine the correspondence between the spatial information and the feedback mode, improving the fineness of the spatial information and the feedback mode.

[0018] In a possible implementation manner, 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.

[0019] In a possible implementation manner, adding 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.

[0020] The second aspect is a device corresponding to the first aspect. For the beneficial effects, refer to the description of the first aspect. A method for providing feedback information is provided. The method is applied to a second communication device and includes: sending indication information about the correspondence between spatial information and a feedback mode to a first communication device, where the feedback mode includes a mode in which the first communication device feeds back channel information to the second communication device; receiving 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 the feedback mode and the location information of the first communication device.

[0021] In a possible implementation, the feedback mode includes a feedback mode related to an electromagnetic map or a feedback mode unrelated to an electromagnetic map. Optionally, 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. 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.

[0022] In a possible implementation, it further includes: receiving second information from the first 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.

[0023] In a possible implementation, 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.

[0024] In a possible implementation, 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.

[0025] In a possible implementation, 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.

[0026] In a possible implementation, when the spatial information is represented by a reference point in the electromagnetic map, the sending of the indication information about the correspondence between the spatial information and the feedback mode includes: sending an electromagnetic map, where the electromagnetic map includes the indication information about the correspondence between the reference point and the feedback mode.

[0027] In a possible implementation, when the first feedback mode is associated with an electromagnetic map when feeding back the first information, it further includes: sending an electromagnetic map of the first spatial information corresponding to the first feedback mode.

[0028] In a possible implementation, it further includes: sending third information, where the third information is used to update the correspondence between the spatial information and the feedback mode.

[0029] In a possible implementation, updating 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 pieces of spatial information, replacing the feedback mode corresponding to one or more pieces of spatial information, or adding the feedback mode corresponding to one or more pieces of spatial information.

[0030] In a possible implementation, adding the feedback mode corresponding to one piece of spatial information includes: adding a correspondence between one piece of spatial information and the feedback mode, or dividing the spatial information into multiple sub-spatial information and adding the correspondences between these multiple sub-spaces and the feedback mode.

[0031] In a third aspect, there is provided a device that can implement the method of the first aspect above. For example, the device includes means corresponding to the first aspect above. The device can be implemented by hardware, by software, or by hardware executing corresponding software.

[0032] In a possible design, the device includes units that execute the first aspect above.

[0033] In a possible design, the device includes a processor, and the processor is used to execute the method of the first aspect above.

[0034] In a 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. The processing circuit uses logic circuits or executes code instructions to implement the method in the first aspect above. Optionally, the processing circuit can be a processor, and the interface circuit can be a transceiver or an input / output interface.

[0035] In a possible design, the device includes a processor and a memory; wherein, the processor is used to execute computer programs or instructions stored in the memory; the memory is used to store the computer programs or the instructions; when the computer programs or the instructions run, the method of the first aspect is executed.

[0036] Optionally, the device may be the first device, or a module or unit (such as a chip, or a chip system, or a circuit) corresponding one by one to the method / operation / step / action described in the first aspect in the first device, or a device that can be used in combination with the first device.

[0037] In a fourth aspect, a device is provided, and the device can implement the method in the second aspect above. For example, the device includes means corresponding to the second aspect above. The device can be implemented by hardware, by software, or by hardware executing corresponding software.

[0038] In a possible design, the device includes units for performing the second aspect above.

[0039] In a possible design, the device includes a processor, and the processor is configured to execute the method in the second aspect above.

[0040] In a possible design, the device includes a processing circuit and an interface circuit. The interface circuit is configured 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. The processing circuit is configured to implement the method in the second aspect above through logic circuits or by executing code instructions.

[0041] In a possible design, the device includes a processor and a memory; wherein, the processor is configured to execute a computer program or instruction stored in the memory; the memory is used to store the computer program or the instruction; when the computer program or the instruction runs, the method in the second aspect is executed.

[0042] Optionally, the device may be the second device, or a module or unit (such as a chip, or a chip system, or a circuit) corresponding one by one to the method / operation / step / action described in the second aspect in the second device, or a device that can be used in combination with the second device.

[0043] In a fifth aspect, a computer-readable storage medium is provided, storing a computer program or instruction. When the computer program or instruction runs on a computer, the computer is caused to execute the method in the first aspect or the second aspect above.

[0044] In a sixth aspect, a computer program product is provided. The computer program product includes a computer program or instruction for executing the method described in the first aspect, or the computer program product includes a computer program or instruction for executing the method described in the second aspect.

[0045] In a seventh aspect, a chip is provided, including a processor coupled to a memory for executing computer programs or instructions stored in the memory, such that the chip implements the method of the first aspect or the second aspect described above.

[0046] In an eighth aspect, a communication system is provided, including: a first communication device and a second communication device; wherein, the first communication device is used to implement the method of the first aspect described above, and the second communication device is used to implement the method of the second aspect described above. Description of the Drawings

[0047] Figure 1 is a schematic diagram of the architecture of the communication system provided by an embodiment of the present application;

[0048] Figure 2 is a schematic diagram of the electromagnetic map provided by an embodiment of the present application;

[0049] Figure 3 is a schematic flowchart provided by an embodiment of the present application;

[0050] Figure 4 is a schematic diagram of the correspondence between spatial information and feedback modes provided by an embodiment of the present application;

[0051] Figure 5 is another schematic diagram of the correspondence between spatial information and feedback modes provided by an embodiment of the present application;

[0052] Figure 6 is a schematic diagram of further dividing spatial information and feedback modes for a reference point provided by an embodiment of the present application;

[0053] Figure 7 is a schematic diagram of the accuracy corresponding to different feedback modes reported by a terminal provided by an embodiment of the present application;

[0054] Figure 8 is a schematic diagram of binding and transmitting first information and second information provided by an embodiment of the present application;

[0055] Figure 9 is a schematic diagram of the correspondence between spatial information and feedback modes provided by an embodiment of the present application;

[0056] Figure 10 and Figure 11 is a schematic diagram of updating spatial information and feedback modes provided by an embodiment of the present application;

[0057] Figure 12 is another schematic flowchart provided by an embodiment of the present application;

[0058] Figure 13 and Figure 14 is a schematic diagram of the structure of the device provided by an embodiment of the present application. Detailed Implementation Manner

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the following will further describe this application in detail 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.

[0060] In the embodiments of this application, the various digital numbers and terms such as "first" and "second" involved are only for the convenience of description and are not used to limit the scope of the embodiments of this application. The magnitudes of the serial numbers of the above processes do not mean the sequence of execution. The execution sequence of each process should be determined by its function and internal logic.

[0061] In the embodiments of this application, for the number of nouns, unless otherwise specified, it means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. "Including at least one of A, B, or C" can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0062] Figure 1 Shows a possible, non-limiting system schematic diagram. As Figure 1 shown, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. Optionally, it also includes the Internet 300.

[0063] 1. RAN

[0064] Among them, the RAN 100 includes at least one RAN node (for example, Figure 1 110a and 110b in Figure 1 etc., which can be collectively referred to as 110) and at least one terminal (for example, 120a to 120j in Figure 1 etc., which can be collectively referred to as 120). Other RAN nodes may also be included in the RAN 100, such as wireless relay devices and / or wireless backhaul devices, etc. (

[0065] The terminal 120 can be connected to the RAN node 110 wirelessly. The RAN node 110 is connected to the core network 200 wirelessly or wiredly. The core network elements in the core network 200 and the RAN nodes 110 in the RAN 100 can be different physical devices respectively, or the same physical device integrating the logical functions of the core network elements and the logical functions of the radio access network.

[0066] Multiple RAN nodes 110 in the communication system 10 can be of the same type or different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative. For example, Figure 1 The network element 120i can be a helicopter or a drone, which can be configured as a mobile base station. For the terminal 120j accessing the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal.

[0067] The RAN 100 can be a cellular system related to the 3rd generation partnership project (3GPP), such as the 4th generation (4G) mobile communication system, the 5th generation (5G) mobile communication system, or an evolved system for the future, such as the 6th generation (6G) mobile communication system. The RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 can also be a communication system integrating two or more of the above systems.

[0068] 1.1. RAN Node

[0069] In a possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), the next generation base station in the 6G mobile communication system, the base station in the future mobile communication system, or an access node in the WiFi system, etc. The RAN node can be a macro base station (such as Figure 1 110a in Figure 1Among them, it can be the 110b) in it, a relay node or a donor node, or a radio controller in a CRAN scenario. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the RAN node in the embodiments of the present application can 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 can also be a logical node, a logical module or software that can implement all or part of the RAN node functions.

[0070] In another possible scenario, multiple RAN nodes cooperate to assist the terminal to achieve wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0071] In different systems, the 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, the CU can also be called an O-CU (open CU), the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU, and RU are used as examples in the present application. Any one of the CU (or CU-CP, CU-UP), DU, and RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0072] RAN nodes, sometimes also referred to as access network devices, RAN entities, access nodes, etc., form part of a communication system and are used to assist terminals in achieving wireless access. In the subsequent descriptions of this application, unless otherwise specified, the term "access network device" will be used for description.

[0073] It can be understood that an access network device can be referred to as a communication device. For example, an access network device can be understood as a device with the function of an access network device. For example, a device for implementing the function of an access network device can be an access network device; or some components in the access network device, such as, for example, CU, DU, etc. It can also be a device that can support the access network device to implement this function, such as a chip system, a hardware circuit, a software module, or a combination of a hardware circuit and a software module. This device can be installed in the access network device or can be used in matching with the access network device. In the embodiments of this application, the chip system can be composed of chips or can also include chips and other discrete devices.

[0074] 1.2. Terminals

[0075] Terminals can also be referred to as terminal devices, user equipment (UE), mobile stations, mobile terminals, etc. Terminals can be widely applied 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, remote medical treatment, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc. Terminals can be mobile phones, head-mounted display devices, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the device form of the terminals.

[0076] It can be understood that a terminal can be referred to as a communication device. For example, a terminal can be understood as a device with the function of a terminal. For example, a device for implementing the function of a terminal can be a terminal; or it can also be a device that can support the terminal to implement this function, such as a chip system, a hardware circuit, a software module, or a combination of a hardware circuit and a software module. This device can be installed in the terminal or can be used in matching with the terminal.

[0077] 2. CN

[0078] CN200 includes at least one core network element. Taking the 5G communication system as an example, CN200 includes network elements such as an access and mobility management function (AMF) network element, a session management function (SMF) network element, a user plane function (UPF) network element, a policy control function (PCF) network element, a unified data management (UDM) network element, and an application function (AF) network element, etc.

[0079] In Figure 1 In the communication system shown, an electromagnetic map is set in the access network device. For example, the access network device establishes an electromagnetic map through methods such as actual measurement, environment modeling + ray tracing (RT), or artificial intelligence (AI), etc. The electromagnetic map is used to represent the distribution of electromagnetic signals in the environment, and it records the intensity and characteristics of various electromagnetic signals in a specific area. For example, the electromagnetic map may partially or wholly include but is not limited to: multipath information, noise level, and spectrum occupancy, etc., at one or more locations. For example, the electromagnetic map may include information on regular regions and / or irregular regions, each region corresponding to one or more reference points. For regular regions, it may also be called a grid region, and the reference points corresponding to the grid region may also be called grids, or lattice points, etc. Exemplarily, the region may include the following information:

[0080] 1. Channel state information

[0081] a) At least one path, each path corresponding to one multipath information;

[0082] b) Scalar intensity identification, such as channel impulse response (CIR), channel quality indicator (CQI), power delay profile (PDP), or angle delay profile (ADP), etc.

[0083] 2. Information on scattering points or virtual anchors of virtual stations.

[0084] 3. Other information.

[0085] Taking the multipath information in the channel state information as an example, the electromagnetic map on the access network device side corresponds to at least one reference point, and each reference point corresponds to a geographical area, which is used to characterize the multipath information from the access network device to the terminals within this geographical area. For example Figure 2 as shown, the electromagnetic map mainly includes:

[0086] 1. The electromagnetic map elements of N reference points N is an integer greater than zero.

[0087] 2. The electromagnetic map elements of each reference point include the multipath information of M n paths between the access network device and this reference point, and M n is an integer greater than zero.

[0088] 3. The multipath information of each path includes amplitude, delay, and angle. Among them, the amplitude can exist in the form of the amplitude or power of the signal. If the access network device and the 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). Further, if the antenna array is a uniform linear array (ULA), AoA and AoD are scalars. Or, if the antenna array is a uniform planar array (UPA), AoA and AoD can be represented by the elevation angle and the yaw angle. In the following description, taking "amplitude" as "power" and the angle including AoA and AoD as an example, the description is carried out.

[0089] In Figure 1 the communication system shown, the terminal can feedback the downlink channel information to the access network device. The access network device performs operations such as precoding on the downlink data according to the downlink channel information feedback by the terminal, so as to improve the transmission quality of the downlink data. In one scheme, the terminal uses a single feedback mode to feedback the downlink channel information to the access network device. Since the terminal is in different geographical locations, the corresponding optimal feedback mode is not the same. The terminal uses a single feedback mode to feedback the downlink data information to the access network device, which may cause low feedback efficiency of the downlink data information and large overhead on the air interface.

[0090] In view of this, an embodiment of the present application provides a method and device for feedback channel information. The method includes: an access network device sends a feedback mode map to a terminal, and the feedback mode map includes the correspondence between different spaces and feedback modes. The terminal can match the corresponding space according to the geographical location information of the terminal, and feedback channel information to the access network device according to the feedback mode corresponding to the space, thereby improving the feedback efficiency of downlink data and reducing the air interface overhead.

[0091] In the following process description, the "terminal" and the "access network device" are used as the execution entities for description. The "terminal" can be understood as a device with terminal functions. For example, the "terminal" can be replaced by a "first communication device", and the first communication device is a device that realizes terminal functions. For example, the first communication device is a terminal, or the first communication device can be a module in the terminal (such as a chip or a circuit, etc.). The "access network device" can be understood as a device with access network device functions. For example, the "access network device" can be replaced by a "second communication device", and the second communication device is a device that realizes access network device functions. 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 (such as a chip or a circuit, etc.), and can also be a logical node (such as a CU, DU, or RU), a logical module, or software that fully or partially realizes access network device functions.

[0092]

Embodiment 1

[0093] As Figure 3 shown, an embodiment of the present application provides a schematic flow diagram, including:

[0094] Step 310: The access network device sends indication information of the correspondence between space information and feedback mode to the terminal, and the terminal receives the indication information of the correspondence between space information and feedback mode from the access network device.

[0095] For example, the feedback mode includes the mode in which the terminal feeds back channel information to the access network device. The terminal can determine the correspondence between the space information and the feedback mode according to the received indication information of the correspondence between the space information and the feedback mode. In a possible implementation manner, the access network device sends a feedback mode map to the terminal, and the feedback mode map includes the indication information of the correspondence between the space information and the feedback mode. The indication information can explicitly indicate the correspondence between the space information and the feedback mode, or implicitly indicate the correspondence between the space 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 space information and the feedback mode in the feedback mode map and determines the correspondence between the space information and the feedback mode. For example, the feedback mode map sent by the access network device to the terminal includes the correspondence between K pieces of space information and feedback modes, and the correspondence between one piece of space information and the feedback mode is expressed as F i, where i is a positive integer greater than or equal to 1 and less than or equal to K, and 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}}.

[0096] 1. Indication of feedback mode.

[0097] The access network device can indicate to the terminal the feedback mode corresponding to each spatial information. Alternatively, the access network device and the terminal can preset the correspondence between the agreed feedback mode and its index. When the access network device indicates the correspondence between the spatial information and the feedback mode to the terminal, it can indicate to the terminal the index corresponding to the feedback mode. "Index" can be replaced by "identifier".

[0098] Among them, the "feedback mode" can refer to the feedback mode adopted by the terminal when feeding back channel information to the access network device. For example, the feedback mode includes a feedback mode related to the electromagnetic map or a feedback mode unrelated to the electromagnetic map. The feedback mode related to the electromagnetic map means that when using this feedback mode to feedback the first information, the electromagnetic map needs to be applied. The feedback mode unrelated to the electromagnetic map means that when using this feedback mode to feedback the first information, the electromagnetic map does not need to be applied.

[0099] For example, the feedback mode related to the electromagnetic map includes a mode of feedbacking location information and a mode of feedbacking calibrated multipath information.

[0100] Mode of feedbacking location information: The terminal determines the matching reference point in the electromagnetic map according to the location information. For example, each reference point in the electromagnetic map has a certain coverage area. The terminal can determine in the electromagnetic map the reference point that can cover the current location of the terminal, and this reference point is considered the matching reference point. The location information of the terminal can refer to the geographical location information of the terminal, and the geographical location of the terminal can be represented in the form of coordinates. For example, the geographical location of the terminal is represented as: the longitude coordinate of the terminal, the latitude coordinate of the terminal. Further, it also includes: the height coordinate of the terminal. The terminal can feedback the location information of the matching reference point to the access network device. The access network device determines the multipath information of this reference point according to the location information of the reference point feedback by the terminal. Further, according to the multipath information of this reference point, operations such as precoding the downlink data are performed. For example, the location information of the reference point can be the index of the reference point or the coordinates of the reference point in the electromagnetic map, etc. Alternatively, the terminal can feedback the location information of the terminal to the access network device. When the access network device receives the location information of the terminal, it determines the matching reference point in the electromagnetic map; the access network device performs operations such as precoding the downlink data according to the multipath information of the matching reference point.

[0101] Mode of feedback calibration of multipath information: The terminal performs channel estimation on the downlink reference signal to determine local multipath information. The terminal determines a matching reference point in the electromagnetic map according to the location information of the terminal; the terminal uses the multipath information of the matching reference point to calibrate the local multipath information to determine the calibrated multipath information. The terminal feeds back the calibrated multipath information to the access network device, and the access network device performs operations such as precoding on the downlink data according to the calibrated multipath information. Optionally, in the mode of feeding back the calibrated multipath information, the terminal can also feed back to the access network device: the location information of the terminal.

[0102] For example, the feedback modes independent of the electromagnetic map include the feedback mode of type II channel state information (CSI), the feedback mode of artificial intelligence (AI), and the feedback mode based on prediction.

[0103] Feedback mode of type II CSI: It includes a codebook of type II CSI, simply referred to as type II CSI. In the feedback mode of type II CSI, the terminal receives the downlink reference signal from the access network device and determines the CSI according to the downlink reference signal; the terminal feeds back the compressed CSI to the access network device. The access network device decompresses the compressed CSI and restores the downlink channel information according to the decompressed CSI. Further, the access network device can perform operations such as precoding on the downlink data according to the restored downlink channel information, so as to improve the downlink data transmission quality.

[0104] Feedback mode of AI: The terminal measures the downlink reference signal to determine the downlink channel information. The terminal can input the downlink channel information into the AI compression model, and the output of the AI compression model is the compressed CSI; the terminal feeds back the compressed CSI to the access network device, and the access network device inputs the received compressed CSI into the CSI decompression model, and the output of the CSI decompression model is the restored downlink channel information, etc. Further, the access network device performs operations such as precoding on the downlink data according to the restored downlink channel information.

[0105] Feedback mode based on prediction: The access network device uses algorithms such as autoregressive model and Kalman filter to predict the channel information. Further, the access network device can correct the predicted channel information according to the channel information reported by the terminal.

[0106] For example, the correspondence between the feedback mode and the index is shown in Table 1.

[0107] Table 1

[0108] Index Feedback mode 1 Mode of feedback position information 2 Mode of feedback calibration multipath information 3 CSI feedback mode of type II 4 Feedback mode of AI 5 Prediction-based feedback mode

[0109] It can be understood that the correspondence between the feedback mode and the index can be preset. For example, it can be stipulated by a protocol, or configured by the access network device for the terminal. For example, the access network device configures the correspondence between the feedback mode and the index for the terminal through radio resource control (RRC) signaling.

[0110] 2. Indication of spatial information.

[0111] 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.

[0112] a) The reference point of the electromagnetic map

[0113] 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: [the 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, etc.

[0114] In a possible implementation, the access network device uses a bitmap to indicate the correspondence between the reference point in the electromagnetic map and the feedback mode. For example, the electromagnetic map includes 5 reference points, and these 5 reference points can be represented by a bitmap with a length of 5 bits. The correspondence between the reference point indicated by the access network device to the terminal and the feedback mode is [01100, feedback mode 1], [10000, feedback mode 2], [00011, feedback mode 3], which means: reference point 3 and reference point 4 correspond to feedback mode 1, reference point 5 corresponds to feedback mode 2, and reference point 1 and reference point 2 correspond to mode 3.

[0115] As Figure 4 shown, the access network device sends the correspondence between the reference point of the electromagnetic map and the feedback mode to the terminal, and the reference point can be indicated by means of the coordinates of the reference point, or the index, or the bitmap, etc. In Figure 4 there are 3 feedback modes, which are respectively represented as 1, 2, and 3. The access network device takes its own geographical location as the center and indicates the correspondence between the reference point and the feedback mode to the terminal.

[0116] In Figure 4 the sizes of the boxes are different. It can be understood that Figure 4 the smallest - granularity box in

[0117] For example, the terminal determines a matching reference point in the electromagnetic map according to the location information of the terminal. For example, when the terminal is within the coverage area of a certain reference point, it is considered that the terminal matches the reference point. Or, when the distance between the terminal and the central position of a certain reference point is less than a threshold, it is considered that the terminal matches the reference point. The terminal determines the feedback mode corresponding to the matching reference point according to the correspondence between the reference point and the feedback mode. The terminal feeds back the first information to the access network device according to the matching feedback mode. It can be understood that the terminal can obtain the electromagnetic map. The ways for the terminal to obtain the electromagnetic map include, but are not limited to: the access network device sends the electromagnetic map to the terminal, and the terminal receives the electromagnetic map from the access network device. The access network device can be Figure 3 the access network device in steps 310 and 320. Or, multiple access network devices send the electromagnetic map to the terminal, and the terminal determines the electromagnetic map in the embodiment of the present application according to the electromagnetic maps sent by the multiple access network devices. For example, each access network device among the multiple access network devices sends a part of the electromagnetic map to the terminal, and the terminal merges the electromagnetic maps sent by the multiple access network devices to determine the electromagnetic map in the embodiment of the present application. Or, the terminal can obtain the electromagnetic map through the D2D method. For example, other terminals send the electromagnetic map to the terminal, and the terminal receives the electromagnetic map from other terminals, etc.

[0118] b) Leaf node of the K-ary tree

[0119] For example, the 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 called leaf nodes. Optionally, if there are other layers in addition to the first layer and the last layer, the nodes in the other layers are called intermediate nodes. Taking a quadtree as an example, a quadtree means that each node corresponds to 4 child nodes. For example, as Figure 5As shown in the figure, the quadtree includes three layers. The nodes in the first layer are called root nodes, and each root node corresponds to four child nodes. The second layer includes four intermediate nodes. The feedback modes corresponding to intermediate node 1 and intermediate node 3 are different. Therefore, the key value information corresponding to intermediate node 1 and intermediate node 3 is "special value". For example, this special value can be -1. Further, the access network device indicates the feedback modes corresponding to the four child nodes under intermediate node 1, which are feedback mode 1, feedback mode 3, feedback mode 2, and feedback mode 1 respectively. The access network device indicates the feedback modes corresponding to the first child node and the fourth child node under intermediate node 3, which are feedback mode 3 and feedback mode 1 respectively. Optionally, when the feedback modes corresponding to the child nodes under an intermediate node are different, the access network device indicates to the terminal the child nodes with the feedback modes indicated by the access network device. For example, for intermediate node 1, the access network device indicates 1111 to the terminal, which means the access network device indicates the feedback modes of the four child nodes corresponding to intermediate node 1 to the terminal. For intermediate node 3, the access network device indicates 1001 to the terminal, which means the access network device indicates the feedback modes of child node 1 and child node 4 corresponding to intermediate node 3 to the terminal. Optionally, for child nodes 2 and 3 under intermediate node 3, the access network device does not indicate their corresponding feedback modes. Then, when the terminal is within the coverage ranges of child nodes 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. The feedback modes corresponding to intermediate node 2 and intermediate node 4 are the same. Therefore, the access network device can indicate the feedback modes corresponding to intermediate node 2 and intermediate node 4 to the terminal, which are: feedback mode 2 and feedback mode 3 respectively.

[0120] In a possible implementation manner, the access network device may use

the topological structure of leaf nodes, key value information

[0121] For example, the terminal determines the geographical location corresponding to each node based on the geographical location of the root node and the K-ary tree. The terminal determines the matching node according to the location information of the terminal. For example, when the terminal is within the coverage area of a certain node, it is considered that the terminal matches the node. Or, when the distance between the terminal and a certain node is less than the threshold, it is considered that the terminal matches the node. The terminal determines the feedback mode corresponding to the matching node according to the corresponding relationship between the node and the feedback mode; the terminal feeds back the first information to the access network device according to the corresponding feedback mode.

[0122] 3) Reference points of the geographical map

[0123] The access network device can take a certain location as the center and divide several geographical regions, and each geographical region corresponds to a reference point. The corresponding relationship between the spatial information indicated by the access network device to the terminal and the feedback mode is specifically: the corresponding relationship between the reference point of the geographical map and the feedback mode.

[0124] For example, the terminal determines the matching reference point according to the location information of the terminal. For example, when the terminal is within the coverage area of the geographical region corresponding to a certain reference point, it is considered that the terminal matches the reference point area. Or, when the distance between the terminal and the center position of a certain reference point is less than the threshold, it is considered that the terminal matches the reference point. The terminal determines the feedback mode corresponding to the reference point matched by the terminal according to the corresponding relationship between the reference point of the geographical map and the feedback mode; the terminal feeds back the first information to the access network device according to the corresponding feedback mode.

[0125] It can be understood that the terminal includes a radio frequency module (component) and a processing module (component). For example, the processing module includes a chip, for example, 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 the indication information of the corresponding relationship between the spatial information and the feedback mode from the access network device through the air interface. The processing module obtains the indication information of the corresponding relationship between the spatial information and the feedback mode through the radio frequency module. The "receiving the indication information of the corresponding relationship between the spatial information and the feedback mode from the access network device" in step 310 can be replaced by "obtaining the indication information of the corresponding relationship between the spatial information and the feedback mode". For example, when the processing module of the terminal obtains the indication information of the corresponding relationship between the spatial information and the feedback mode, it can be understood that: the processing module of the terminal obtains the information corresponding to the indication information of the corresponding relationship between the spatial information and the feedback mode through the input / output (I / O) interface. Another example, when the radio frequency module of the terminal obtains the indication information of the corresponding relationship between the spatial information and the feedback mode, it can be understood that the radio frequency module of the terminal receives the indication information of the corresponding relationship between the spatial information and the feedback mode from the access network device.

[0126] Step 320: The terminal sends the first information to the access network device, and the access network device receives the first information from the terminal.

[0127] For example, 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 location information of the terminal. For example, after the terminal obtains the correspondence between the spatial information and the feedback mode: The terminal determines the first spatial information according to the location information of the terminal; The terminal determines the first feedback mode corresponding to the first spatial information according to the correspondence between the spatial information and the feedback mode; The terminal determines the first information according to the first feedback mode, etc. What specific information the first information includes depends on the first feedback mode. In different feedback modes, the first information fed back by the terminal to the access network device can be different.

[0128] It can be understood that: In the description of this application, "send" can be replaced by "feedback". For example, the terminal sending the first information to the access network device can be replaced by: The terminal feeding back the first information to the access network device. In a possible implementation manner, in step 320, the radio frequency module of the terminal can send the first information to the access network device through the air interface. For example, the processing module of the terminal outputs the first information to the radio frequency module through the I / O interface, and then the radio frequency module of the terminal sends the first information to the access network device through the air interface.

[0129] When the spatial information is represented by the reference points in the electromagnetic map, the electromagnetic map and the correspondence between the spatial information and the feedback mode can be sent in a fused manner:

[0130] The terminal obtains the indication information of the correspondence between the spatial information and the feedback mode, including: The terminal obtains the electromagnetic map, and the electromagnetic map includes the indication information of the correspondence between the reference points 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, etc.

[0131] 1. One reference point in the electromagnetic map corresponds to one feedback mode. For example, in addition to the multipath information of N reference points included in the electromagnetic map, it also includes the reference points and their corresponding feedback modes. For example, the reference point l in the electromagnetic map is represented as: It represents that the reference point l corresponds to the feedback mode F l . It can be understood 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 can be default.

[0132] 2. Multiple reference points in the electromagnetic map correspond to one feedback mode. For example, the electromagnetic map sent by the access network device to the terminal is represented as: It represents that the feedback mode corresponding to the reference points 1 to a in the electromagnetic map is F1, and the feedback mode corresponding to the reference points a + 1 to the reference point b is F2.

[0133] 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:

[0134] In this way, it is necessary to determine 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 to the terminal, etc., 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 manner in which the access network device sends the correspondence between the spatial information and the feedback mode to the terminal is as follows:

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

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

[0139] It is understandable that in the above description, one reference point or multiple reference points in the electromagnetic map correspond 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 bound to the reference point, which can be a reference point in the electromagnetic map or a reference point in the 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 in the coverage area corresponding to the reference point.

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

[0141] For example, Figure 6 As shown, for 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 l, the area corresponding to reference point l can be divided into multiple sub-reference points, and one or more sub-reference points correspond to one feedback mode. Figure 6 In the figure, the numbers "1", "2" and "3" are used to represent feedback modes 1, 2 and 3.

[0142] It is understandable that in Figure 6 In the example, the box with the smallest granularity represents a sub-reference point, and the box with large granularity includes multiple boxes with small granularity. 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 box with large granularity.

[0143] In an embodiment of the present application, the access network device may transmit a complete electromagnetic map to the terminal, or, when the terminal's mobile range is small or the area of ​​the reference point 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 mode, some feedback modes are related to the electromagnetic map, that is, when the terminal uses the feedback mode to feedback the first information, it needs to use the electromagnetic map; some feedback modes are not related to the electromagnetic map, that is, when the terminal uses the 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 when feeding back the first information, when it is not related to the electromagnetic map: 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 part of the 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 channel information fed back by the terminal in different feedback modes, and the access device can determine the correspondence between the spatial information and the feedback mode according to the information fed back by the terminal.

[0146] For example, the terminal may send second information to the access network device. The second information is the accuracy information of the terminal's feedback of 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. Optionally, the accuracy information of the feedback of channel information in different feedback modes includes: in different feedback modes, the accuracy information of the terminal's feedback of channel information at different positions and / or different times.

[0147] In a possible implementation, the terminal may collect the accuracy information of the terminal's feedback of channel information 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 reconstructs the channel according to the first information; the terminal determines the local channel according to the downlink reference signal; the terminal determines the difference degree between the reconstructed channel and the local channel. It can be understood that when the difference degree between the reconstructed channel and the local channel is smaller, it indicates that the accuracy of the first information fed back using the current feedback mode is higher, otherwise it indicates lower accuracy. In the following example, taking the difference degree information between the reconstructed channel and the local channel as an example to represent the accuracy information of the access network device's feedback of channel information, the difference degree information between the reconstructed channel and the local channel can be simply referred to as difference degree information. For example, at location 1, the terminal determines that the difference degree information corresponding to the CSI feedback mode of type II is 0.85, the difference degree information corresponding to the mode of feedback calibration of multipath information is 0.91, and the difference degree 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 location), {CSI feedback mode of type II: 0.85}, {mode of feedback calibration of multipath information: 0.91}, {AI feedback mode: 0.92}}. For example, the terminal location can be represented by the longitude and latitude coordinates of the terminal, for example, expressed as [longitude coordinate, longitude coordinate].

[0148] Alternatively, the terminal may collect the accuracy information of the terminal's feedback of channel information to the access network device at different times. For example, the time may be a time slot. The second information fed back by the terminal to the access network device can be expressed as: {UE location, {difference degree information of feedback mode 1 at time slot t1, difference degree information of feedback mode 1 at time slot t2,...}} and so on. For example, for the CSI feedback mode of type II, the second information fed back by the terminal to the access network device can be expressed as: {(terminal location), {CSI feedback of type II: 0.85, 0.83, 0.87,...}}. Optionally, the second information further includes: indication information of the time slot, such as the time slot number. Or, when the second information does not include the 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 according to the time of receiving the second information.

[0149] Alternatively, the terminal can collect the accuracy information of the channel information fed back by the terminal to the access network device at different positions. For example, the second information fed back by the terminal to the access network device can be expressed as: {{terminal location 1, {differential information of feedback mode 1},...}, {terminal location 2, {differential information of feedback mode 2},...},...}.

[0150] It can be understood that the terminal can combine at least two of the differential information of different feedback modes, the differential information of different times, or the differential information of different positions as the second information and feed it back to the access network device. For example, as Figure 7 shown, the terminal is mobile. As the terminal moves, the geographical location of the terminal changes. In time slot 1, the terminal is located at position 1 and the terminal collects 3 feedback modes. In time slot 2, the terminal is located at position 2 and the terminal collects 5 feedback modes; in time slot 3, the terminal is located at position 3 and the terminal collects 2 feedback modes; in time slot 4, the terminal is located at position 4 and the terminal collects 1 feedback mode. The terminal obtains the accuracy information corresponding to the 11 feedback modes, combines the accuracy information corresponding to the 11 feedback modes together, generates the second information, and reports it to the access network device. Optionally, the above 11 feedback modes can be the same or different, without limitation.

[0151] In a possible implementation manner, the terminal can periodically report the second information to the access network device. For example, the terminal reports the second information to the access network device every interval period T. Alternatively, the terminal can report the second information to the access network device aperiodically. For example, during the connection between the terminal and the access network device, when the terminal receives an activation signaling or meets certain conditions, the terminal reports the second information to the access network device. For example, the conditions include that the differential information collected by the terminal is greater than or equal to a threshold value, etc.

[0152] Optionally, the terminal can compress the second information and the terminal feeds back the compressed second information to the access network device. For example, the compression method includes fixed-length compression. For example, when the number of differential information collected by the terminal reaches a fixed value, the fixed-length compression method is used to compress the differential information of the fixed value. Alternatively, the terminal can perform variable-length compression, entropy compression or other compression methods 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 and the first information can be bound for transmission. For example, the second information can be transmitted in series after the first information, as Figure 8As shown. Optionally, if the first information includes the location of the terminal, for example, in the mode of feedback calibration of multipath information, the first information fed back may include the location information of the terminal, then the location information of the terminal 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 identifier of the feedback mode 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 according to 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, the classification algorithms include: machine learning statistical discrimination (such as decision tree, SVM algorithm), clustering (K-means, DBSCAN, etc. algorithms), deep learning (DL) (such as classification based on neural network). Based on the classification algorithm, the determined correspondence between the spatial information and the feedback mode is as Figure 9 shown in a of. Or, after receiving the second information, the access network device may determine the correspondence between the spatial information and the feedback mode based on the method of region division. For example, the access network device may divide the geographical map into different regions, one region may correspond to a reference point, and the access network device may determine the optimal feedback mode corresponding to a geographical region and establish the correspondence between the reference point corresponding to the geographical region and the feedback mode. Or, the access network device may determine the optimal feedback mode corresponding to the region corresponding to the reference point in the electromagnetic map and determine the correspondence between the reference point and the optimal feedback mode. Or, the access network device may determine the optimal feedback mode corresponding to the region corresponding to the node in the K-ary tree and establish the correspondence between the node and the optimal feedback mode. The determined correspondence between the spatial information and the feedback mode based on the region division may be referred to Figure 9 shown in b of. In a possible implementation manner, the difference degree 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 spatial information, the terminal reports the cosine similarities of 2 feedback modes. Then, when the feedback bits (i.e., the bits of the first information) corresponding to the 2 feedback modes are the same, the access network device selects the feedback mode with a better cosine similarity and establishes the correspondence between the feedback mode and the spatial information. Or, the difference degree 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 spatial information, the terminal reports the NMSEs of 2 feedback modes. Then, when the feedback bits corresponding to the 2 feedback modes are the same, the access network device preferentially selects the feedback mode with a smaller NMSE and establishes the correspondence between the feedback mode and the spatial information.

[0155]

Embodiment III

[0156] The access network device can update the "corresponding relationship between spatial information and feedback mode". For example, the access network device sends the third information to the terminal, and the terminal obtains the third information, which is used to update the corresponding relationship between spatial information and feedback mode. For example, for Figure 3 the spatial information and feedback mode indicated by the access network device to the terminal in step 310 are updated.

[0157] For example, the access network device can update the corresponding relationship between the spatial information and feedback mode that has been indicated to the terminal according to the received second information, or upper-layer instructions, etc. The update includes at least one of the following: addition, deletion, replacement. For example, updating the corresponding relationship between spatial information and 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.

[0158] 1. Update according to the electromagnetic map or the geographic map:

[0159] a. The access network device updates according to the reference point, which can be a reference point in the electromagnetic map or a reference point in the geographic map.

[0160] For example, the access network device can indicate to the terminal the corresponding relationship between the spatial information and feedback mode to be updated. In the case where one spatial information corresponds to one feedback mode, the corresponding relationship between the spatial information and feedback mode indicated by the access network device to the terminal can be expressed as: {spatial information 1, feedback mode}, {spatial information 2, feedback mode}. After receiving the above update information, the terminal updates the feedback modes corresponding to spatial information 1 and spatial information 2 according to the above indication. Or, in the case where one spatial information corresponds to multiple feedback modes, the corresponding relationship between the spatial information and feedback mode indicated by the access network device to the terminal can be expressed as: {{spatial information 1, spatial information 2}, feedback mode}, {{spatial information 3, spatial information 4}, feedback mode}. After receiving the above update information, the terminal updates spatial information 1 and spatial information 2 to the corresponding feedback modes according to the above indication, and updates spatial information 3 and spatial information 4 to the corresponding feedback modes.

[0161] It can be understood that the above spatial information can be represented by the coordinates of the reference point in the electromagnetic map or the geographic map, or index, etc. Or, the access network device can update the corresponding relationship between spatial information and feedback mode in the form of a bitmap, without limitation. Regarding the indication of the corresponding relationship between spatial information and feedback mode by using the location method, reference can be made to the previous description.

[0162] b. The access network device is updated according to regions.

[0163] For example, the correspondence between the spatial information to be updated indicated by the access network device to the terminal and the feedback mode can be expressed as {Region 1, feedback mode}. Then the terminal updates the feedback mode corresponding to Region 1 above according to the indication of the access network device. Or, it can be expressed as {{Region 1, Region 2}, feedback mode}, then the terminal updates the feedback modes corresponding to Region 1 and Region 2 above according to the indication of the access network device.

[0164] Optionally, a region refers to a contiguous whole region. For example, the ways for the access network device to indicate a region to the terminal include: {center of a circle, radius}. The terminal can determine a circular region based on the center of the circle and the radius, and the reference points covered by this circular region are all updated to the feedback mode corresponding to this region. Or, the ways for the access network device to indicate a region to the terminal include: {center of a cuboid, length, width, and height}. The terminal can determine a cuboid based on the center of the cuboid and the length, width, and height, and the reference points covered by this cuboid are all updated to the feedback mode corresponding to this region.

[0165] As Figure 10 shown in a, it represents the correspondence between the spatial information and the feedback mode. The square represents the region corresponding to the spatial information, and the number in the square is used to represent the feedback mode corresponding to this spatial information. For example, when the number in the square is 3, it means that the feedback mode corresponding to the spatial information corresponding to this square is 3. When the number in a certain square is 0, it means that the feedback mode for the spatial information corresponding to this square is not configured. The access network device can add Figure 10 the correspondence between the spatial information and the feedback mode in a. For example, as Figure 10 shown in b, the access network device adds the feedback modes corresponding to several pieces of spatial information that are not configured with feedback modes to 2, 3, 3, and 2 respectively. The access network device can also change the correspondence between the spatial information and the feedback mode. As Figure 10 shown in c, for a piece of spatial information whose corresponding feedback mode is 2, the access network device can change the feedback mode corresponding to this spatial information to 3. The access network device can also delete the correspondence between the spatial information and the feedback mode. As Figure 10 shown in d, for a piece of spatial information whose corresponding feedback mode is 3, the access network device can delete the feedback mode corresponding to this spatial information.

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

[0167] As previously described, in the K-ary tree structure, the correspondence between the spatial information and the feedback mode can be expressed as: [index of the leaf node, key value information]. Since operations such as addition, update, and deletion only involve changes in the feedback mode, the access network device can modify the key value information corresponding to the index of the leaf node.

[0168] It can be understood that in the above description, "adding a feedback mode corresponding to a spatial information" includes: adding a correspondence between a spatial information and a feedback mode. For example, if a spatial information has not been configured with a feedback mode before, then in the updating process, a corresponding feedback mode can be configured for this spatial information. "Or, adding a feedback mode corresponding to a spatial information" can also be understood as: dividing a spatial information into multiple sub-spaces and adding the correspondence between the multiple sub-spaces and the feedback mode. It can be understood that the sub-spaces divided into multiple sub-spatial information may or may not have corresponding feedback modes before, without limitation. In this process description, the refinement degree of the spatial information is refined, so as to increase the accuracy of the correspondence between the spatial information and the feedback mode.

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

[0170] 1. Refine the correspondence between the spatial information and the 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 newly added. When the terminal receives the indication, it can split the area corresponding to this reference point into multiple sub-areas. The reference point can refer to the reference point in the electromagnetic map or the reference point in the geographical 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 can be {reference point 1, feedback mode 2, feedback mode 3, and feedback mode 4}. Then when the terminal receives this indication information, it can divide the area corresponding to the reference point into 3 sub-areas, and the corresponding feedback modes are feedback mode 2, 3, and 4 respectively. Further, the access network device can also indicate to the terminal the correspondence between the sub-areas and the feedback mode. Or, the correspondence between the sub-areas and the feedback mode can be predefined, and the terminal can determine the correspondence between the feedback mode and the sub-areas according to the predefined rules. Further, the access network device can also indicate to the terminal the space corresponding to each sub-area. For example, the space corresponding to each sub-area can be represented in the form of {center of the circle, radius} or {center of the cuboid, length, width, and height}, etc. Or, the terminal can divide the area corresponding to the reference point into the corresponding number of sub-areas according to the predefined method.

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

[0174] The access network device indicates to the terminal the identifier of the node to be newly added and the 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 identifier of the node.

[0175] In a possible implementation, as Figure 11 shown, it is a schematic diagram of the correspondence between the newly added spatial information of the nodes in the quadtree and the feedback mode. Initially, the access network device indicates three regions to the terminal, and the feedback modes of these three regions are 1, 2, and 3 respectively. At this time, the quadtree is called the initial tree 0. For the first increment, the access network device indicates that the feedback mode corresponding to the second region is 3, and subdivides the fourth region. For example, the fourth region is further divided into 4 sub-regions, and the corresponding feedback modes are 1, 3, 2, and 1 respectively. At this time, the quadtree is called the increment tree 1. For the second increment, the access network device subdivides the first region and the third region, and the fourth region is subdivided again. At this time, the quadtree is called the increment tree 2. For example, in the second increment, the first region is divided into 4 sub-regions. Among them, the feedback modes corresponding to the first sub-region and the fourth sub-region are both 1. The second sub-region and the third sub-region are not configured with feedback modes, and the corresponding feedback mode can be 0. The second region is divided into 4 sub-regions. Among them, the feedback modes corresponding to the first sub-region, the second sub-region, and the fourth sub-region are 3, 2, and 1 respectively. Among them, the third sub-region is not configured with a feedback mode, and the corresponding feedback mode is 0. The fourth region is divided into 4 sub-regions. Among them, the feedback mode corresponding to the fourth sub-region is 1, and the first to third sub-regions are not configured with feedback modes, and the corresponding feedback mode is 0.

[0176] Through the above design, the access network device can flexibly update the correspondence between the spatial information and the feedback mode, so that the terminal can use a better feedback mode to transmit channel information in the corresponding space. Further, through the accuracy information of different feedback modes reported by the terminal, the access network device can refine the correspondence between the spatial information and the feedback mode, and improve the fineness of the spatial information and the feedback mode.

[0177]

Embodiment 4

[0178] The embodiment of the present application also provides a process, as Figure 12 shown, including:

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

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

[0181] The feedback of the first information based on the correspondence between spatial information and feedback mode can also be referred to as the feedback of the first information based on the feedback mode map. It can be understood that the feedback mode map includes the correspondence between spatial information and feedback mode. 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 embodiments of the present application; otherwise, the terminal decides by itself the way to feed back channel information to the access network device.

[0182] b) Activate the distribution process of the correspondence between spatial information and feedback mode.

[0183] It can be understood that the downlink process of the correspondence between spatial information and 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 spatial information and feedback mode in the feedback mode map.

[0184] c) Activate the accuracy information of the feedback mode adopted by the terminal and report the second information to the access network device.

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

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

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

[0188] e) The method for determining the difference degree between the reconstructed channel and the local channel

[0189] For example, the access network device and the terminal can negotiate the method for determining the difference degree between the reconstructed channel and the local channel. For example, the cosine similarity function and NMSE, etc. can be used to measure the difference degree between the two.

[0190] It can be understood that in the above pre-interaction process, the information negotiated between the terminal and the access network device can also be predefined. 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 spatial information and feedback mode and the electromagnetic map to the terminal.

[0192] For example, the correspondence between the electromagnetic map and the spatial information and feedback mode can be transmitted in a bound 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, etc.

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

[0194] For example, the terminal determines the matching spatial information according to the position of the terminal, and the matching spatial information can be called the first spatial information. The feedback mode corresponding to the first spatial information determined by the terminal is called the first feedback mode.

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

[0196] Optionally, the terminal can collect the accuracy information of the first piece of information fed back in different time slots, different positions, and different feedback modes by the terminal, and the terminal feeds back a second piece of information including the accuracy information to the access network device. According to the second piece of information, the access network device can determine the correspondence between spatial information and feedback mode, or update the determined correspondence between spatial information and feedback mode. The first piece of information and the second piece of information can be transmitted in a bound manner or independently, without limitation. For example, the transmission mode of the first piece of information and the second piece of information can be in accordance with protocol rules, indicated by the access network device, or reported by the terminal, etc., without limitation.

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

[0198] After receiving the updated correspondence between spatial information and feedback mode, the terminal can determine the spatial information matching the position information of the terminal according to the updated spatial information and feedback mode, and further determine the matching feedback mode; according to the matching feedback mode, the terminal sends a second piece of information to the access network device.

[0199] Through the above design, the access network device indicates the correspondence between spatial information and feedback mode to the terminal. According to 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, saving the computing resources of the terminal and reducing the processing complexity on the terminal side.

[0200] It can be understood that in the embodiments of this application:

[0201] 1. In each process, the order of different steps is not restricted. And in each process, it may include fewer steps or more steps than those shown in the process schematic diagram or described in words.

[0202] 2. In the embodiments of the present application, "receiving information from (such as an access network device) by (such as a terminal)" can be understood as the source end of the information being the access network device and the destination end being the terminal, and it may include the terminal directly or indirectly receiving information from the access network device. Necessary processing may be performed on the information between the source end and the destination end of the information transmission, such as format change, etc., but the destination end can understand the valid information from the source end. Similar expressions in the present application can be understood similarly and will not be elaborated here.

[0203] In the above embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspective of the interaction between the terminal and the access network device. To implement each function in the methods provided by the embodiments of the present application, the terminal or the 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 combination of a hardware structure and a software module. Which way among a hardware structure, a software module, or a combination of a hardware structure and a software module is used to execute a certain function among the above functions depends on the design constraints of the specific application of the technical solution.

[0204] Figure 13 and Figure 14 is a schematic structural diagram of a possible communication device provided by the embodiments of the present application. These communication devices can implement one or more corresponding functions in the above 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 method embodiments. In the 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 the terminal or the access network device.

[0205] such as Figure 13 As shown, the 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 the access network device in the above Figure 3 method embodiments.

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

[0207] When the communication device 1300 is used to implement Figure 3When the function of the terminal is involved, specifically: a transceiver unit 1320, configured to obtain indication information of the correspondence between spatial information and feedback modes, where the feedback modes include the modes in which the first communication device feeds back channel information to the second communication device; a processing unit 1310, configured to generate first information; the transceiver unit 1320 is further configured to feed back the 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.

[0208] In a possible implementation manner, the feedback modes include feedback modes related to an electromagnetic map or feedback modes unrelated to an electromagnetic map. For example, the feedback modes related to an electromagnetic map include a mode of feeding back location information and a mode of feeding back calibrated multipath information. The feedback modes unrelated to an electromagnetic map include a type II channel state information (CSI) feedback mode, an artificial intelligence (AI) feedback mode, and a prediction-based feedback mode.

[0209] In a possible implementation manner, the transceiver unit 1320 is further configured to: feed back second information to the second 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 the feedback mode.

[0210] In a possible implementation manner, 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 at different times.

[0211] In a possible implementation manner, 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, including: 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.

[0212] In a possible implementation manner, 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.

[0213] In a possible implementation manner, when the spatial information is represented by a reference point in the electromagnetic map, the obtaining of the indication information of the correspondence between the spatial information and the feedback mode includes: obtaining an electromagnetic map, where the electromagnetic map includes the indication information of the correspondence between the reference point and the feedback mode.

[0214] In a possible implementation, when the first feedback mode is associated with the 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, the updating 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.

[0217] In a possible implementation, adding 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 correspondence between the multiple sub-spaces and the feedback mode.

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

[0219] In a possible implementation, the feedback mode includes a feedback mode related to the electromagnetic map or a feedback mode unrelated to the electromagnetic map. Optionally, 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. 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.

[0220] In a possible implementation, the transceiver unit 1320 is further configured to: 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 the feedback mode.

[0221] In a possible implementation, the accuracy information of the feedback 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 positions and / or different times.

[0222] In a possible implementation, 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, including: the first feedback mode is the feedback mode corresponding to the first spatial information, and the first spatial information is determined according to the position information of the first communication device.

[0223] In a possible implementation, 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.

[0224] In a possible implementation, when the spatial information is represented by a reference point in the electromagnetic map, the indication information of the correspondence between the transmitted spatial information and the feedback mode includes: transmitting an electromagnetic map, where the electromagnetic map includes the indication information of the correspondence between the reference point 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: transmit 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: transmit a third piece of information, where the third piece of information is used to update the correspondence between the spatial information and the feedback mode.

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

[0228] In a possible implementation, the adding of the feedback mode corresponding to one piece of spatial information includes: adding a correspondence between one piece of 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.

[0229] For a more detailed description of the processing unit 1310 and the transceiver unit 1320, reference may be made to the description in the above method embodiments Figure 3 and will not be elaborated here.

[0230] In a 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 the O-CU-CP entity and the O-CU-UP entity, the processing unit 1310 may be located on the O-CU-CP entity or the O-CU-UP entity. Or, the processing unit 1310 is located on the O-DU entity, and the transceiver unit 1320 is located on the O-RU entity. Or, 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 can be understood that the division of units in the embodiments of the present application is illustrative, merely a logical function division, and there may be other division methods in actual implementation. In addition, each functional unit in the embodiments of the present application may be integrated in a physical device (for example, in a processor), or each functional unit may be a separate physical device, or two or more units may be integrated in one unit for implementation. The above integrated units may be implemented in the form of hardware, or in the form of software function modules, etc.

[0232] As Figure 14 shown, 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 can be understood that the processing circuit 1410 may be a processor, and the interface circuit 1420 may be a transceiver or an input / output interface.

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

[0234] Optionally, the memory (such as 1430) in the embodiments of the present application may be integrated in the processing circuit (such as 1414), or the memory (such as 1430) and the processing circuit (such as 1414) may be provided separately.

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

[0236] When the above communication device is a chip applied to a terminal, the chip implements the functions of the terminal in the above method embodiments. The chip receives the information sent by the access network device to the terminal through other modules (such as radio frequency modules or antennas) in the terminal; or, the chip sends information to other modules (such as radio frequency modules or antennas) in the terminal, and this information is sent by the terminal to the access network device.

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

[0238] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), 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 may be a random access memory (RAM), flash memory, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), register, hard disk, removable hard disk, CD-ROM, or any other form of storage medium well-known in the art.

[0240] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a removable hard disk, a 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 a component of the processor. The processor and the storage medium can be located in an ASIC.

[0241] The embodiments of the present application further provide a communication device, which includes a processor and a memory. The processor is used to implement Figure 3 the functions of the access network device or the terminal in Figure 3 For example, the processor is used to execute the computer program or instructions stored in the memory, and the memory is used to store the computer program or the instructions. When the computer program or the instructions run,

[0242] The embodiments of the present application further provide a communication device, including a processor, and the processor is used to implement Figure 3 the functions of the access network device or the terminal in

[0243] The embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores instructions, which can also be referred to as computer programs, computer program codes, etc. The instructions run on a computer, so that the computer executes the Figure 3 functions of the access network device or the terminal in the above method embodiments.

[0244] The embodiments of the present application further provide a computer program product, including a computer program or instructions. The computer program product includes computer programs or instructions for executing Figure 3 the methods of the terminal in Figure 3 or the computer program product includes computer programs or instructions for executing

[0245] The embodiments of the present application further provide a chip, which includes a processor. The processor is coupled to the memory, and the processor is used to execute the computer program or instructions stored in the memory, so that Figure 3 the functions of the access network device or the terminal in

[0246] The embodiments of the present application further provide a communication system, including a first communication device and a second communication device. The first communication device is used to implementFigure 3 The functions of the middle terminal, which are implemented by the second communication device Figure 3 The functions of the access network device

[0247] In the above embodiments, they can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part 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 executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can 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 can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile types of storage media.

[0248] In various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their internal 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 of 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 at 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 of the correspondence between the spatial information and the feedback mode includes: obtaining an electromagnetic map, where the electromagnetic map includes the indication information of 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 the 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, characterized in that, The adding of the feedback mode corresponding to one spatial information includes: adding a 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.

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 modes for the first communication device to feedback 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 the feedback mode and the location information of the first communication device.

15. The method according to claim 14, wherein 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 feedbacking location information and the mode of feedbacking calibrated multipath information.

17. The method according to claim 15, wherein The feedback modes unrelated to the electromagnetic map include the type II channel state information (CSI) feedback mode, 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 in feedbacking channel information 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.

19. The method according to claim 18, characterized in that, The accuracy information of feedbacking channel information under different feedback modes includes: under different feedback modes, the accuracy information of the first communication device in feedbacking 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 the feedback mode 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, wherein 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 the feedback mode includes: sending the electromagnetic map, where the electromagnetic map includes the indication information on the correspondence between the reference point and the feedback mode.

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 feedbacking 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 the feedback mode.

25. The method according to claim 24, wherein The updating of the correspondence between the spatial information and the feedback mode 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 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.

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

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

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

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