Channel map acquisition method and communication apparatus

Abstract

The present application discloses a channel map acquisition method and a communication apparatus. The method comprises: a second network element receives a first reference signal, determines first information, and sends the first information to a first network element, the first information indicating a first grid in a channel map, the first information being obtained on the basis of a first feature of a wireless signal, and the first feature of the wireless signal being obtained on the basis of the first reference signal; the first network element determines first channel map information, the first channel map information being channel map information corresponding to the first grid in the channel map; and the first network element sends second information to the second network element, the second information indicating the first channel map information. The first network element receives, from the second network element the first grid in the channel map corresponding to the first feature of the wireless signal, and the first network element may send the first channel map information corresponding to the first grid to the second network element. The acquisition of the channel map does not depend on actual positioning measurement, thereby improving channel map auxiliary communication performance.

Description

Method for acquiring channel map and communication device

[0001] The present application claims priority from the Chinese patent application No. 202410994755.1 filed on July 23, 2024, and entitled "Method for acquiring channel map and communication device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of communication perception, and in particular to a method for acquiring a channel map and a communication device. BACKGROUND

[0003] In a communication application such as environment perception constructing a channel map, a grid-level channel feature library needs to be used to assist communication, and therefore, the real-time position of a terminal device needs to be acquired to apply the channel map. However, a commonly used positioning method is to acquire the real-time position of the terminal device by sending a reference signal, which is too long in a measurement period for the reference signal, and difficult to adapt to a scenario in which a physical environment changes greatly. Moreover, due to privacy security issues, accurate physical position coordinate information cannot be necessarily acquired.

[0004] Therefore, how to acquire corresponding channel map information in time is a problem to be solved. SUMMARY

[0005] The present application provides a method for acquiring a channel map and a communication device, and acquires corresponding map information in time.

[0006] In a first aspect, a method for acquiring a channel map is provided. The method can be applied to a first network element side, that is, the method can be executed by a first network element or a component (such as a chip or a chip system or a circuit or a communication module) having a function of the first network element. The chip is, for example, a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core. The present application does not limit this.

[0007] The method can include: receiving first information, the first information indicating a first grid in a channel map, the channel map corresponding to at least one grid, the first grid being any one of the at least one grid, the first information being obtained based on a first feature of a wireless signal; determining first channel map information, the first channel map information being channel map information corresponding to the first grid in the channel map; and sending second information, the second information indicating the first channel map information.

[0008] By using the method, the first network element can send, to the second network element, first channel map information corresponding to the first grid in the channel map corresponding to the first feature of the wireless signal, acquisition of the channel map information not depending on actual positioning measurement, thereby improving channel map assisted communication performance.

[0009] With reference to the first aspect, in a possible design, the method further includes: sending third information, the third information indicating a first correspondence relationship, the first correspondence relationship including a correspondence relationship among the first grid, a first value range corresponding to the first feature of the wireless signal, and the first channel map information.

[0010] By using the design, the first network element configures the first correspondence relationship, so that the second network element can determine the first grid based on the first feature of the wireless signal and the first correspondence relationship after obtaining the first feature of the wireless signal based on the first reference signal.

[0011] With reference to the first aspect, in another possible design, the method further includes: sending fourth information, the fourth information indicating a second correspondence relationship, the second correspondence relationship including a correspondence relationship among the first grid, physical location information corresponding to the first grid, and the first channel map information; and sending fifth information, the fifth information indicating a third correspondence relationship, the third correspondence relationship including a correspondence relationship between the physical location information corresponding to the first grid and a first value range corresponding to the first feature of the wireless signal.

[0012] By using the design, the first network element configures the second correspondence relationship and the third correspondence relationship, so that the second network element can determine the first grid based on the first feature of the wireless signal, the second correspondence relationship, and the third correspondence relationship after obtaining the first feature of the wireless signal based on the first reference signal.

[0013] With reference to the first aspect, in still another possible design, the first feature of the wireless signal includes at least one of the following: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, angle of arrival peak, angle of departure, identifier of a beam, angle of a beam, reference signal received power, reference signal received quality, and reference signal received indication.

[0014] With reference to the first aspect, in a possible design of the method, the method further includes: receiving sixth information, where the sixth information indicates a first grid set in the channel map, the channel map includes at least one grid set, the first grid set includes the first grid and at least one second grid, and the sixth information is obtained based on the second characteristic of the wireless signal; and sending seventh information, where the seventh information indicates second channel map information corresponding to the first grid set, and the second channel map information includes the first channel map information.

[0015] With this design, the second network element can obtain a second value range corresponding to the second characteristic of the wireless signal by measuring the second reference signal, determine the first grid set based on the second value range corresponding to the second characteristic of the wireless signal, and indicate the first grid set to the first network element; the first network element can send, to the third network element, second channel map information corresponding to the first grid set based on the first grid set; the third network element can determine the first grid based on the second channel map information and a first value range corresponding to the first characteristic of the wireless signal obtained by measuring the third reference signal, and indicate the first grid to the first network element; and the first network element can send, to the third network element, the first channel map information corresponding to the first grid based on the first grid. Through the foregoing scheme, the accuracy of obtaining channel map information can be improved.

[0016] With reference to the first aspect, in a possible design of the method, the seventh information further includes a correspondence between at least one grid of the first grid set, at least one first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

[0017] With this design, by carrying the correspondence in the seventh information, the first network element does not need to previously send the correspondence under multiple grid sets, and signaling overhead can be saved.

[0018] With reference to the first aspect, in a possible design of the method, the method further includes: sending eighth information, where the eighth information indicates a fourth correspondence, and the fourth correspondence includes a correspondence between the first grid set, a second value range corresponding to the second characteristic of the wireless signal, and the second channel map information.

[0019] With reference to the first aspect, in a possible design of the method, the method further includes: sending ninth information, where the ninth information indicates a fifth correspondence, and the fifth correspondence includes a correspondence between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

[0020] With this design, by previously sending the correspondence, the execution efficiency of a subsequent process can be improved.

[0021] With reference to the first aspect, in a possible design of the method, the method further includes: sending tenth information, where the tenth information indicates a sixth correspondence relationship, and the sixth correspondence relationship includes a correspondence relationship among the first grid, physical location information corresponding to the first grid, and first channel map information; and sending eleventh information, where the eleventh information indicates a seventh correspondence relationship, and the seventh correspondence relationship includes a correspondence relationship between the physical location information corresponding to the first grid and a first value range corresponding to the first characteristic of the wireless signal.

[0022] With reference to the first aspect, in a possible design of the method, the second characteristic of the wireless signal includes at least one of: a time delay, a time delay spread, a k-factor, a number of multipaths, an angle of arrival, an angle of arrival peak, an angle of departure, an identifier of a beam, a beam angle, a reference signal received power, a reference signal received quality, and a reference signal received indication.

[0023] With reference to the first aspect, in a possible design of the method, the first channel map information includes at least one of the following channel characteristics: grid-associated scatterer information, a channel statistical covariance matrix, an angle spectrum, a time delay spectrum, and a path loss.

[0024] The second aspect provides a method for acquiring a channel map, which can be applied to a second network element side, that is, the method can be executed by the second network element or a component (for example, a chip or a chip system or a circuit or a communication module) having a function of the second network element, where the chip is, for example, a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SiP) chip containing a modem core. The present application does not limit this.

[0025] The method can include: receiving a first reference signal; determining first information, where the first information indicates a first grid in a channel map, the channel map corresponds to at least one grid, the first grid is any one of the at least one grid, and the first information is obtained based on a first characteristic of a wireless signal, the first characteristic of the wireless signal is obtained based on the first reference signal; sending the first information; and receiving second information, where the second information indicates first channel map information, and the first channel map information is channel map information corresponding to the first grid in the channel map.

[0026] By using the method, the second network element sends, to the first network element, a first grid in a channel map corresponding to a first characteristic of a wireless signal, and the first network element sends, to the second network element, first channel map information corresponding to the first grid, where acquisition of the channel map information does not depend on actual positioning measurement, and the performance of channel map assisted communication is improved.

[0027] With reference to the second aspect, in a possible design of the method, the method further includes: receiving third information, where the third information indicates a first correspondence relationship, and the first correspondence relationship includes a correspondence relationship between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

[0028] With reference to the second aspect, in another possible design of the method, the method further includes: receiving fourth information, where the fourth information indicates a second correspondence relationship, and the second correspondence relationship includes a correspondence relationship between the first grid, physical location information corresponding to the first grid, and the first channel map information; and receiving fifth information, where the fifth information indicates a third correspondence relationship, and the third correspondence relationship includes a correspondence relationship between the physical location information corresponding to the first grid and the first value range corresponding to the first characteristic of the wireless signal.

[0029] With reference to the second aspect, in another possible design of the method, the first characteristic of the wireless signal includes at least one of: a time delay, a time delay spread, a k-factor, a number of multipaths, an angle of arrival, a peak angle of arrival, an angle of departure, an identifier of a beam, a beam angle, a reference signal received power, a reference signal received quality, and a reference signal received indication.

[0030] With reference to the second aspect, in another possible design of the method, the method further includes: receiving a second reference signal; and sending sixth information, where the sixth information indicates a first grid set in the channel map, the channel map includes at least one grid set, the first grid set includes the first grid, and the first grid set further includes at least one second grid, and the sixth information is obtained based on a second characteristic of a wireless signal, and the second characteristic of the wireless signal is obtained based on the second reference signal.

[0031] With reference to the second aspect, in another possible design of the method, the method further includes: receiving eighth information, where the eighth information indicates a fourth correspondence relationship, and the fourth correspondence relationship includes a correspondence relationship between the first grid set, a second value range corresponding to the second characteristic of the wireless signal, and the second channel map information.

[0032] With reference to the second aspect, in another possible design of the method, the second characteristic of the wireless signal includes at least one of: a time delay, a time delay spread, a k-factor, a number of multipaths, an angle of arrival, a peak angle of arrival, an angle of departure, an identifier of a beam, a beam angle, a reference signal received power, a reference signal received quality, and a reference signal received indication.

[0033] With reference to the second aspect, in another possible design of the method, the first channel map information includes at least one of the following channel characteristics: grid-associated scatterer information, a channel statistical covariance matrix, an angle spectrum, a time delay spectrum, and a path loss.

[0034] In a third aspect, a method for acquiring a channel map is provided. The method can be applied to a third network element side, that is, the method can be executed by the third network element or a component (for example, a chip or a chip system or a circuit or a communication module) with the function of the third network element. The chip can be a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SiP) chip containing a modem core. The present application does not limit this.

[0035] The method can include receiving seventh information indicating second channel map information corresponding to a first grid set, the first grid set including a first grid and at least one second grid; receiving a third reference signal; and sending first information indicating the first grid, the first information being obtained based on a first characteristic of a wireless signal, the first characteristic of the wireless signal being obtained based on the third reference signal.

[0036] With this design, the second network element can obtain a second value range corresponding to a second characteristic of a wireless signal by measuring a second reference signal, determine a first grid set based on the second value range corresponding to the second characteristic of the wireless signal, and indicate the first grid set to the first network element. The first network element can send second channel map information corresponding to the first grid set to the third network element based on the first grid set. The third network element can determine a first grid based on the second channel map information and a first value range corresponding to a first characteristic of a wireless signal obtained by measuring a third reference signal, and indicate the first grid to the first network element. The first network element can send first channel map information corresponding to the first grid based on the first grid. Through the above scheme, the accuracy of acquiring channel map information can be improved.

[0037] In combination with the first aspect, in yet another possible design, the seventh information further includes a correspondence between at least one grid of the first grid set, at least one first value range corresponding to the first characteristic of the wireless signal, and at least one first channel map information.

[0038] With this design, by carrying the above correspondence in the seventh information, the first network element does not need to previously send the above correspondence under multiple grid sets, and signaling overhead can be saved.

[0039] In combination with the third aspect, in a possible design, the method further includes receiving ninth information indicating a fifth correspondence, the fifth correspondence including a correspondence between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and first channel map information.

[0040] With this design, by previously receiving the above correspondence, the execution efficiency of subsequent processes can be improved.

[0041] With reference to the third aspect, in an alternative design, the method further includes receiving a tenth information, where the tenth information indicates a sixth correspondence, and the sixth correspondence includes a correspondence between the first grid, physical location information corresponding to the first grid, and first channel map information; and receiving an eleventh information, where the eleventh information indicates a seventh correspondence, and the seventh correspondence includes a correspondence between the physical location information corresponding to the first grid and a first value range corresponding to the first characteristic of the wireless signal.

[0042] With reference to the third aspect, in yet another design, the first characteristic of the wireless signal includes at least one of: a delay, a delay spread, a k-factor, a number of multipaths, an angle of arrival, an angle of arrival peak, an angle of departure, an identity of a beam, a beam angle, a reference signal received power, a reference signal received quality, and a reference signal received indication.

[0043] With reference to the third aspect, in yet another design, the second characteristic of the wireless signal includes at least one of: a delay, a delay spread, a k-factor, a number of multipaths, an angle of arrival, an angle of arrival peak, an angle of departure, an identity of a beam, a beam angle, a reference signal received power, a reference signal received quality, and a reference signal received indication.

[0044] A fourth aspect provides a communication apparatus. The communication apparatus can implement the method in the first aspect or in any of the implementation forms of the first aspect. For example, the communication apparatus can be a chip or a first network element. The method can be implemented by software, hardware, or by hardware executing corresponding software.

[0045] In an alternative design, the apparatus includes a transceiver and a processing unit, where: the transceiver is configured to receive first information, where the first information indicates a first grid in a channel map, the channel map corresponds to at least one grid, the first grid is any one of the at least one grid, and the first information is obtained based on a first characteristic of a wireless signal; the processing unit is configured to determine first channel map information, where the first channel map information is channel map information in the channel map corresponding to the first grid; and the transceiver is further configured to send second information, where the second information indicates the first channel map information.

[0046] Optionally, the processing unit is further configured to generate third information, where the third information indicates a first correspondence, and the first correspondence includes a correspondence between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information; and the transceiver is further configured to send the third information.

[0047] Optionally, the processing unit is further configured to generate fourth information, the fourth information indicating a second correspondence relationship, the second correspondence relationship comprising a correspondence relationship among the first grid, physical position information corresponding to the first grid, and the first channel map information; the transceiver is further configured to transmit the fourth information; the processing unit is further configured to generate fifth information, the fifth information indicating a third correspondence relationship, the third correspondence relationship comprising a correspondence relationship between the physical position information corresponding to the first grid and a first value range corresponding to the first feature of the wireless signal; and the transceiver is further configured to transmit the fifth information.

[0048] Optionally, the first feature of the wireless signal comprises at least one of: a time delay, a time delay spread, a k-factor, a number of multipaths, an angle of arrival, an angle of arrival peak, an angle of departure, an identifier of a beam, a beam angle, a reference signal received power, a reference signal received quality, and a reference signal received indication.

[0049] Optionally, the transceiver is further configured to receive sixth information, the sixth information indicating a first grid set in the channel map, the channel map comprising at least one grid set, the first grid set comprising the first grid and at least one second grid, the sixth information being obtained based on a second feature of a wireless signal; the processing unit is further configured to generate seventh information, the seventh information indicating second channel map information corresponding to the first grid set, the second map information comprising the first channel map information; and the transceiver is further configured to transmit the seventh information.

[0050] Optionally, the transceiver is further configured to transmit eighth information, the eighth information indicating a fourth correspondence relationship, the fourth correspondence relationship comprising a correspondence relationship among the first grid set, a second value range corresponding to the second feature of the wireless signal, and the second channel map information.

[0051] Optionally, the transceiver is further configured to transmit ninth information, the ninth information indicating a fifth correspondence relationship, the fifth correspondence relationship comprising a correspondence relationship among the first grid, a first value range corresponding to the first feature of the wireless signal, and the first channel map information.

[0052] Optionally, the transceiver is further configured to transmit tenth information, the tenth information indicating a sixth correspondence relationship, the sixth correspondence relationship comprising a correspondence relationship among the first grid, physical position information corresponding to the first grid, and the first channel map information; and the transceiver is further configured to transmit eleventh information, the eleventh information indicating a seventh correspondence relationship, the seventh correspondence relationship comprising a correspondence relationship between the physical position information corresponding to the first grid and a first value range corresponding to the first feature of the wireless signal.

[0053] Optionally, the second characteristic of the wireless signal comprises at least one of: a time delay, a time delay spread, a k-factor, a number of multipaths, an angle of arrival, an angle of arrival peak, an angle of departure, an identity of a beam, a beam angle, a reference signal received power, a reference signal received quality, a reference signal received indication.

[0054] Optionally, the first channel map information comprises at least one channel characteristic of: a grid associated scatterer information, a channel statistical covariance matrix, an angle spectrum, a time delay spectrum, a path loss.

[0055] Further features and advantages can be found in the corresponding description of the first aspect.

[0056] In a fifth aspect, a communication apparatus is provided. The communication apparatus can implement the method in the second aspect or any of the implementations of the second aspect. For example, the communication apparatus can be a chip or a second network element. The method can be implemented by software, hardware, or by hardware executing corresponding software.

[0057] In a possible implementation, the apparatus comprises: a transceiver and a processing unit; wherein the transceiver is configured to receive a first reference signal; the processing unit is configured to determine first information, the first information indicating a first grid in a channel map, the channel map corresponding to at least one grid, the first grid being any one of the at least one grid, the first information being obtained based on a first characteristic of a wireless signal, the first characteristic of the wireless signal being obtained based on the first reference signal; the transceiver is further configured to send the first information; and the transceiver is further configured to receive second information, the second information indicating first channel map information, the first channel map information being channel map information in the channel map corresponding to the first grid.

[0058] Optionally, the transceiver is further configured to receive third information, the third information indicating a first correspondence relationship, the first correspondence relationship comprising a correspondence relationship between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

[0059] Optionally, the transceiver is further configured to receive fourth information, the fourth information indicating a second correspondence relationship, the second correspondence relationship comprising a correspondence relationship between the first grid, physical location information corresponding to the first grid, and the first channel map information; and the transceiver is further configured to receive fifth information, the fifth information indicating a third correspondence relationship, the third correspondence relationship comprising a correspondence relationship between the physical location information corresponding to the first grid and the first value range corresponding to the first characteristic of the wireless signal.

[0060] Optionally, the first characteristic of the wireless signal comprises at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, angle of arrival peak, angle of departure, identity of a beam, angle of a beam, reference signal received power, reference signal received quality, reference signal received indication.

[0061] Optionally, the transceiver is further configured to receive a second reference signal; the processor is further configured to generate sixth information, the sixth information indicating a first grid set in the channel map, the channel map comprising at least one grid set, the first grid set comprising the first grid and at least one second grid, the sixth information being based on a second characteristic of a wireless signal, the second characteristic of the wireless signal being based on the second reference signal; and the transceiver is further configured to transmit the sixth information.

[0062] Optionally, the transceiver is further configured to receive eighth information, the eighth information indicating a fourth correspondence relationship, the fourth correspondence relationship comprising a correspondence relationship between a first grid set, a second value range corresponding to a second characteristic of a wireless signal, and second channel map information.

[0063] Optionally, the second characteristic of the wireless signal comprises at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, angle of arrival peak, angle of departure, identity of a beam, angle of a beam, reference signal received power, reference signal received quality, reference signal received indication.

[0064] Optionally, the first channel map information comprises at least one channel characteristic of: grid-associated scatterer information, channel statistical covariance matrix, angle spectrum, time delay spectrum, path loss.

[0065] Further features and advantages can be found in the description of the second aspect.

[0066] In a sixth aspect, a communication apparatus is provided. The communication apparatus can implement the method in the third aspect or any of the implementations of the third aspect. For example, the communication apparatus can be a chip or a third network element. The method can be implemented by software, hardware, or by hardware executing corresponding software.

[0067] In a possible implementation, the apparatus includes: a transceiver and a processing unit; the transceiver is configured to receive seventh information, the seventh information indicating second channel map information corresponding to a first grid set, the first grid set including a first grid and at least one second grid; the transceiver is further configured to receive a third reference signal; the processing unit is configured to generate first information, the first information indicating the first grid, the first information being obtained based on a first characteristic of a wireless signal, the first characteristic of the wireless signal being obtained based on the third reference signal; and the transceiver is further configured to send the first information.

[0068] Optionally, the transceiver is further configured to receive ninth information, the ninth information indicating a fifth correspondence relationship, the fifth correspondence relationship including a correspondence relationship between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

[0069] Optionally, the transceiver is further configured to receive tenth information, the tenth information indicating a sixth correspondence relationship, the sixth correspondence relationship including a correspondence relationship between the first grid, physical location information corresponding to the first grid, and the first channel map information; and the transceiver is further configured to receive eleventh information, the eleventh information indicating a seventh correspondence relationship, the seventh correspondence relationship including a correspondence relationship between the physical location information corresponding to the first grid and the first value range corresponding to the first characteristic of the wireless signal.

[0070] Optionally, the first characteristic of the wireless signal includes at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, peak angle of arrival, angle of departure, identifier of a beam, beam angle, reference signal received power, reference signal received quality, and reference signal received indication.

[0071] In another possible implementation, the communication apparatus in the above fourth aspect to sixth aspect includes a processor coupled with a memory; the processor is configured to support the apparatus to perform corresponding functions in the above channel state information reporting method. The memory is coupled with the processor, and stores computer programs (or computer executable instructions) and / or data necessary for the apparatus. Optionally, the communication apparatus can further include a communication interface for supporting communication between the apparatus and other network elements, such as transmission or reception of data and / or signals. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module, or other types of communication interfaces. Optionally, the memory can be located inside the communication apparatus and integrated with the processor; or located outside the communication apparatus.

[0072] In a further possible implementation form of the fourth aspect to the sixth aspect, the communication apparatus comprises a processor and a transceiver, the processor is coupled to the transceiver, and the processor is configured to execute a computer program or instructions to control the transceiver to receive and send information; and when the processor executes the computer program or instructions, the processor is further configured to implement the above method by a logic circuit or an execution code instruction. The transceiver can be a transceiver, a transceiver circuit or an input / output interface, configured to receive a signal from another communication apparatus outside the communication apparatus and transmit the signal to the processor, or send a signal from the processor to another communication apparatus outside the communication apparatus. When the communication apparatus is a chip, the transceiver is a transceiver circuit or an input / output interface.

[0073] When the communication apparatus in the fourth aspect to the sixth aspect is a chip, the sending unit can be an output unit, such as an output circuit or a communication interface; and the receiving unit can be an input unit, such as an input circuit or a communication interface. When the communication apparatus is a terminal device, the sending unit can be a transmitter or a transmitter; and the receiving unit can be a receiver or a receiver.

[0074] In a seventh aspect, a communication system is provided, which comprises the communication apparatus according to the fourth aspect or any possible implementation of the fourth aspect, the communication apparatus according to the fifth aspect or any possible implementation of the fifth aspect, and the communication apparatus according to the sixth aspect or any possible implementation of the sixth aspect.

[0075] In an eighth aspect, a computer readable storage medium is provided, which stores a computer program or instructions, and when the program or instructions are executed by a processor, the method according to the first aspect or any possible implementation of the first aspect is implemented, or the method according to the second aspect or any possible implementation of the second aspect is implemented, or the method according to the third aspect or any possible implementation of the third aspect is implemented.

[0076] In a ninth aspect, a computer program product is provided, which when executed on a computing device, implements the method according to the first aspect or any possible implementation of the first aspect, or the method according to the second aspect or any possible implementation of the second aspect, or the method according to the third aspect or any possible implementation of the third aspect. BRIEF DESCRIPTION OF DRAWINGS

[0077] FIG. 1 is a schematic diagram of an architecture 100 of a communication system suitable for embodiments of the present application;

[0078] FIG. 2 is a schematic diagram of a communication network element structure between a network device and a terminal device suitable for embodiments of the present application;

[0079] FIG. 3 is another schematic diagram of a wireless communication system suitable for embodiments of the present application;

[0080] FIG. 4 is a schematic diagram of constructing a channel map;

[0081] FIG. 5 is a schematic diagram of a wireless communication system 400 suitable for embodiments of the present application;

[0082] FIG. 6 is a schematic diagram of a wireless communication system 500 suitable for embodiments of the present application;

[0083] FIG. 7 is a schematic diagram of a positioning scenario 600 suitable for embodiments of the present application;

[0084] FIG. 8 is a schematic diagram of another positioning scenario 700 suitable for embodiments of the present application;

[0085] FIG. 9 is a schematic diagram of assisting communication by using a grid-level channel feature library;

[0086] FIGS. 10-11 are schematic diagrams of a method of obtaining a channel map according to embodiments of the present application;

[0087] FIGS. 12-13 are schematic diagrams of a communication device according to embodiments of the present application. DETAILED DESCRIPTION

[0088] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0089] The technical solutions provided by the present application can be applied to various communication systems, such as a new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, etc. The technical solutions provided by the present application can also be applied to future communication systems. The technical solutions provided by the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication systems. The technical solutions provided by the present application can also be applied to low-frequency scenarios, high-frequency scenarios, terahertz, etc.

[0090] The technical solutions provided in the application can also be applied to non-terrestrial network (NTN) systems such as inter-satellite communication and satellite communication. As an example, a satellite communication system includes a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with a base station. The satellite can act as a base station or a terminal device. The satellite can refer to a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, a high-orbit satellite, and the like. The satellite can also refer to a non-ground base station or a non-ground device.

[0091] A device in a communication system can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, etc. The device can also be replaced by an entity, a network entity, a network element, a communication device, a communication module, a node, a communication node, etc. The disclosure is described by taking the device as an example. For example, the communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device.

[0092] The terminal device in the embodiments of the present application can be a device or module with corresponding communication functions for accessing the above-mentioned communication system. The terminal device can include various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used in various scenarios, such as cellular communication, D2D, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city UAV, robot, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a user equipment (UE) of the 3rd generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handset, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, a transport vehicle with wireless communication function, a communication module, a road side unit (RSU) with terminal function, or a device built-in the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem. For the convenience of description, the terminal device will be described as an example of a terminal or UE hereinafter.

[0093] It should be understood that in certain scenarios, a UE can also be used to function as a base station. For example, a UE can function as a scheduling entity that provides sidelink signals between UEs in V2X, D2D, or P2P, etc. scenarios.

[0094] In the embodiments of the present application, the device for realizing the function of the terminal device, i.e., the terminal device, can be a terminal device or a device capable of supporting the terminal device to realize the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the device.

[0095] The network device in the embodiments of the present application can be a device or module with corresponding communication function. The network device can be a device for communicating with a terminal device, and the network device can also be referred to as an access network device or a radio access network device, for example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmission point, primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being arranged in the foregoing device or apparatus. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0096] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to serve as a device communicating with another base station.

[0097] In some deployments, the network device mentioned by embodiments of the application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0098] In some deployments, a plurality of RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or a radio unit (RU) (or radio frequency unit), etc. The CU and the DU can be separately arranged, or can be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or a radio frequency unit, such as an RRU, an AAU or an RRH.

[0099] In some deployments, the CU is a logical node that carries the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer and other control functions of the access network device. The CU is connected to network nodes such as core networks through some interfaces, which can be E2 interfaces, etc. Optionally, the CU has part of the functions of the core network. The CU (such as the PDCP layer and higher layers) is connected to the DU (such as the radio link control (RLC) layer and lower layers) through some interfaces, which can be F1 interfaces, etc. In some examples, these interfaces (such as the F1 interface) can provide control plane (C-Plane) and user plane (U-Plane) functions (such as interface management, system information management, UE context management, RRC message transmission, etc.). The F1 application protocol (F1AP) is an application protocol of the F1 interface, which defines the signaling procedures of the F1 in some examples. The F1 interface supports the control plane (F1 control plane, F1-C), the user plane (F1 user plane, F1-U).

[0100] In some deployments, a CU can be split into a CU-CP and a CU-UP. The CU-CP is a logical node that carries the control plane part of PDCP (PDCP-C) layer and RRC layer, and is used to implement the control plane function of the CU. The CU-CP can interact with a network element in the core network that is used to implement the control plane function. The network element in the core network that is used to implement the control plane function can be an access and mobility function network element. The CU-UP is a logical node that carries the user plane part of PDCP (PDCP-U) layer and SDAP layer, and is used to implement the user plane function of the CU. The CU-UP can interact with a network element in the core network that is used to implement the user plane function. The network element in the core network that is used to implement the user plane function. The above configurations of the CU and the DU are merely examples, and the CU and the DU can have other functions according to needs. For example, the CU or the DU can be configured to have more protocol layer functions, or the CU or the DU can be configured to have partial processing functions of the protocol layers. For example, partial functions of the RLC layer and functions of the protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and functions of the protocol layers below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to service types or other system requirements. For example, functions that need to meet a relatively short delay requirement in processing time are arranged in the DU, and functions that do not need to meet the delay requirement are arranged in the CU.

[0101] In some deployments, a DU is a logical node that carries an RLC layer, a medium access control (MAC) layer, a higher physical (Higher PHY) layer, and other functions. In some examples, a DU can control at least one RU. The DU is connected to the RU through some interfaces, which can be a front-haul interface. In some examples, the Higher PHY layer includes part of the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, and other processing functions.

[0102] In some deployments, a RU is a logical node that hosts lower physical layer (Lower PHY) and radio frequency (RF) processing. In some examples, a RU can be a TRP or a RRH or other similar functional entity. In some examples, a Low-PHY includes portions of PHY processing such as fast Fourier transform (FFT), inverse fast Fourier transformation (IFFT), digital beamforming and filtering, and other processing functions. A RU communicates with one or more UEs over a wireless link.

[0103] A DU and a RU can or can not be co-located. A DU and a RU exchange control plane information and user plane information over a fronthaul link via a lower-layer split-control, user and synchronization (LLS-CUS) interface. The LLS-CUS can include interfaces that provide control plane and user plane, respectively. In some examples, the control plane refers to real-time control between a DU and a RU. A DU and a RU have an interface of a fronthaul link (e.g., a lower layer split management plane (LLS-M) interface) to exchange management information, and the management plane (M-Plane) refers to non-real-time management operations between a DU and a RU.

[0104] A DU and a RU can cooperate to collectively implement the functionality of a PHY layer. A DU can be connected to one or more RUs. The functionality that a DU and a RU have can be configured in multiple ways according to design. For example, a DU is configured to implement baseband functionality and a RU is configured to implement mid- RF functionality. As another example, a DU is configured to implement high-layer functionality in a PHY layer and a RU is configured to implement low-layer functionality in the PHY layer or to implement the low-layer functionality and RF functionality. The high-layer functionality in the PHY layer can include a portion of functionality of the PHY layer that is closer to a MAC layer, and the low-layer functionality in the PHY layer can include another portion of functionality of the PHY layer that is closer to a mid-RF side.

[0105] In one possible design, a processing unit in a BBU that implements baseband functionality is referred to as a base band high (BBH) unit, and a processing unit in a RRU / AAU / RRH that implements baseband functionality is referred to as a base band low (BBL) unit.

[0106] The CU (or CU-CP and CU-UP), DU, or RU can also have different names in different systems, but those skilled in the art can understand their meanings. For example, the radio access network can also be an open radio access network (O-RAN) architecture, in which the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CUs (or CU-CPs, CU-UPs), DUs, and RUs in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0107] In the embodiments of the present application, the device for implementing the function of the network device can be a network device, or a device capable of supporting the network device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the device. In the embodiments of the present application, only the device for implementing the function of the network device is taken as an example for description, and the scheme of the embodiments of the present application is not limited.

[0108] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on aircraft, balloons, and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network device and the terminal device are located. In addition, the terminal device and the network device can be hardware devices, or software functions running on special-purpose hardware, software functions running on general-purpose hardware, such as virtualized functions instantiated on a platform (e.g., a cloud platform), or entities including special-purpose or general-purpose hardware devices and software functions. The specific forms of the terminal device and the network device are not limited in the present application.

[0109] First, a communication system suitable for the embodiments of the present application is briefly introduced:

[0110] Referring to FIG. 1, FIG. 1 is a schematic diagram of a wireless communication system suitable for the embodiments of the present application.

[0111] As shown in FIG. 1, the wireless communication system includes a radio access network 100. The radio access network 100 can be a next generation radio access network, or a legacy (e.g., 5G or 4G) radio access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the radio access network 100. Network elements in the wireless communication system are connected through an interface (e.g., a next generation interface (NG), Xn), or an air interface.

[0112] FIG. 1 is only a schematic diagram, and the wireless communication system can also include other devices, such as a core network (CN) device, a wireless relay device, and / or a wireless backhaul device, etc., which are not shown in FIG. 1.

[0113] FIG. 2 shows a schematic diagram of communication network element structures between a network device and a terminal device in the present application. As shown in FIG. 2(a), the terminal device 10 includes a processor 101, a memory 102, and a transceiver 103 including a transmitter 1031, a receiver 1032, and an antenna 1033. As shown in FIG. 2(b), the network device 20 includes a processor 201, a memory 202, and a transceiver 203 including a transmitter 2031, a receiver 2032, and an antenna 2033. The receiver 1032 can be configured to receive transmission control information through the antenna 1033, and the transmitter 1031 can be configured to send transmission feedback information to the network device 20 through the antenna 1033. The transmitter 2031 can be configured to send transmission control information to the terminal device 10 through the antenna 2033, and the receiver 2032 can be configured to receive transmission feedback information sent by the terminal device 10 through the antenna 2033.

[0114] The communication network element structures shown in FIG. 2 are applicable to the communication between the network device and the terminal device in the network system of FIG. 1.

[0115] Referring to FIG. 3, FIG. 3 is another schematic diagram of a wireless communication system applicable to the embodiments of the present application.

[0116] As shown in FIG. 3, the wireless communication system can include core network devices, access network devices (e.g., RANs), and terminal devices. The access network devices communicate with the core network devices through backhaul links and communicate with the terminal devices through air interfaces. For example, a BBU in an access network device communicates with a core network through a backhaul link, and a RU in the access network device communicates with a terminal device through an air interface. The BBU can communicate with the RU through a front-haul link, and the BBU and the RU can or can not be co-located. In some deployments, the BBU includes at least one CU and at least one DU, and the CU and the DU can communicate through a mid-haul link.

[0117] FIG. 3 is only a schematic diagram, and other devices can also be included in the wireless communication system, which are not shown in FIG. 3.

[0118] For example, in an open radio access network (open RAN, ORAN), a logical component service unit (SU) can also be included, which is responsible for providing specific services or functions.

[0119] The SU can be a software module, a hardware device, or a combination of the two. The SU communicates and cooperates with other ORAN components to achieve the overall wireless access network function. For example, the SU can perform the following functions: protocol processing: processing wireless access related protocols, such as air interface protocols, MAC protocols, etc. Data processing: processing uplink and downlink data, including encoding, decoding, modulation, demodulation, etc. Resource management: managing wireless resources, such as spectrum, power, time slots, etc., to ensure efficient resource utilization. Security function: providing security mechanisms, such as encryption, authentication, authorization, etc., to protect the security of wireless communication. Interface function: interfacing with other ORAN components or external networks to exchange data and work cooperatively.

[0120] It should be noted that the specific functions and definitions of the SU can vary depending on different ORAN implementations and application scenarios. For example, in the embodiments of the present application, the functions of the first network element can be implemented in the SU, that is, the SU can store the content of the channel map and transmit it to the CU / DU when called.

[0121] The channel map is a database for storing channel characteristics based on grid location information. Here, "grid" generally refers to a spatial division method that divides continuous space into a number of small, discrete units (i.e., grids). Each grid is associated with a set of channel characteristics, which describe the channel characteristics at that grid location. For example, a physical cell is divided into two-dimensional or three-dimensional grids, and each grid point stores a number of channel characteristics in the form of a matrix, a vector, or a scalar.

[0122] Exemplarily, the "grid" in this application is a term for describing the division of positions or areas, which can also be replaced by similar terms such as range, mesh, etc., and embodiments of this application do not limit this.

[0123] As shown in FIG. 4, it is a schematic diagram for constructing a channel map. By perceiving the physical world, information such as fingerprints, positions, distances, shapes, materials, etc. can be obtained. By constructing a twin environment corresponding to the physical world, a channel map can be constructed by using the twin environment, ray tracing (RT) technology and a historical database. The construction of the twin environment can utilize point cloud modeling and dynamic perception technology. The ray tracing technology involves physical optics and full-wave simulation technology. The historical database involves model interpolation, artificial intelligence (AI) / machine learning (ML) and virtual scatterer mapping technology.

[0124] The channel characteristics include at least one of the following: the channel characteristics include grid-related scatterer information, channel statistical covariance matrix, angle spectrum, time delay spectrum and path loss. The grid-related scatterer information describes the type, position, size and number of scatterers (such as buildings, mountains, trees, etc.) existing at the grid position. These scatterers will affect the propagation of wireless signals. The channel statistical covariance matrix describes the statistical properties of the channel impulse response. It contains the correlation information of the channel at different times, frequencies or spatial positions. The angle spectrum describes the directional distribution of signal arrival or departure. In a multiple input multiple output (MIMO) system, the angle spectrum is very important for beamforming and interference management. The time delay spectrum describes the multipath time delay distribution experienced by the signal during propagation. It reflects the time difference of signal propagation on different paths. The path loss describes the power attenuation of the signal during propagation. It is affected by many factors, such as distance, frequency, scatterer, etc.

[0125] FIG. 5 is a schematic diagram of a wireless communication system 400 suitable for embodiments of the present application. The communication system 400 includes terminal devices (denoted as UEs in FIG. 5), a radio access network (denoted as a next generation radio access network (NG-RAN) in FIG. 5) and a core network.

[0126] The radio access network includes one or more next generation evolved node Bs (ng-eNBs) and gNBs. The ng-eNB represents an LTE base station accessing a 5G core network, and the gNB represents a 5G base station accessing a 5G core network. The ng-eNB and the gNB communicate with each other, or two ng-eNBs, or two gNBs through an Xn interface. The Xn interface can also be referred to as an XnAP interface. The radio access network is connected to the core network through an NG control plane (NG-C) interface.

[0127] The core network includes an access and mobility management function (AMF) and a location management function (LMF) and other functions.

[0128] The LMF is responsible for supporting different types of location services related to the UE, including positioning of the UE and transmission of assistance data to the UE. The LMF can signal with the RAN, for example, an ng-eNB or a gNB, and the UE. For example, the LMF and the ng-eNB or the gNB exchange information through new radio positioning protocol annex (NRPPa) messages, such as obtaining configuration information of a position reference signal (PRS), a sounding reference signal (SRS), cell timing, cell location information, and the like. For another example, the LMF and the UE exchange UE capability information, assistance information, measurement information, and the like through LTE positioning protocol (LPP) messages.

[0129] The AMF entity can receive a location service request related to the UE from a location services (LCS) entity of a 5G core (5GC), or the AMF itself can initiate some location services on behalf of a specific UE, and forward the location service request to the LMF.

[0130] The terminal device is connected to the radio access network through an ng-eNB via an LTE user network LTE-Uu interface. The terminal device can also be connected to the radio access network through a gNB via an NR user network NR-Uu interface.

[0131] It should be understood that one or more base stations (including ng-eNB or gNB) can be included in the communication system 400. It should also be understood that one or more terminal devices can be included in the communication system 400, for example, including one or more terminal device groups (such as the UE set shown in FIG. 5). A gNB can send data or control signaling to one or more terminal devices. Multiple gNBs can also send data or control signaling to one terminal device at the same time.

[0132] Optionally, the ng-eNB and gNB in FIG. 5 can also be replaced by TRP, TP, reception point (RP), cell, etc.

[0133] Referring to FIG. 6, as an example, FIG. 6 is a schematic diagram of a wireless communication system 500 suitable for embodiments of the present application. As shown in FIG. 6, the wireless communication system 500 can include at least one terminal device, for example, the UE 501 shown in FIG. 6. The wireless communication system 500 can further include multiple network devices (which can be base stations (BS) or TRPs, and hereinafter, base stations are taken as an example), wherein the multiple base stations include a base station of a serving cell of the terminal device 501 and base stations of one or more neighboring cells of the serving cell. The base station of the serving cell (which can also be referred to as a serving base station) is 502 shown in FIG. 6, and the base stations of the neighboring cells (which can also be referred to as neighboring base stations) are 503 and 504 shown in FIG. 6. Both the network devices and the terminal device can be configured with multiple antennas, and the network devices and the terminal device can communicate using multiple antenna technology.

[0134] Optionally, the base stations in FIG. 6 can be replaced by TRP, TP, RP, cell, etc.

[0135] In addition to the network devices and the terminal device, the wireless communication system 500 can also include an LMF network element 505. The LMF network element 505 can be used to implement the location estimation of the terminal device. The LMF network element 505 can be deployed inside the core network, that is, the LMF network element 505 also belongs to a kind of core network network element. The LMF network element 505 can communicate with the network device through an AMF network element (not shown in the figure). For ease of description, the LMF network element sends information to the network device through the AMF network element in the embodiments of the present application is referred to as the LMF network element sends information to the network device. In other words, the LMF network element sends messages to the network device as claimed in the embodiments of the present application can be understood as that the LMF network element first sends information to the AMF network element, and the AMF network element forwards the information to the network device. Optionally, if there is an interface between the LMF network element and the network device, the LMF network element can directly send information to the network device.

[0136] In some embodiments, part of the function of the LMF network element 505, such as a location management component (LMC), can be integrated in the network device. For example, the base station 502 of the serving cell and the base stations 503 and 504 of the two neighboring cells all integrate the LMC. The LMC of the LMF network element integrated in the network device sending information to the network device can also be considered as the LMF network element sending information to the network device.

[0137] It should be noted that the architecture of the communication system shown in FIG. 6 is only as an example, and other architectures can be used. For example, FIG. 6 shows the base station 502 of the serving cell and the base stations 503 and 504 of the two neighboring cells. Obviously, the communication system 500 can also include more base stations of neighboring cells.

[0138] In the communication system 400 and the communication system 500, the LMF network element and the base station communicate through the NR positioning protocol (NRPPa) protocol. The LMF network element and the UE communicate through the LPP protocol. Among them, the LMF interacts with the base station through the NRPPa protocol to exchange cell information, such as the configuration information of the reference signal of the cell, the timing information of the cell, and the geographic location information of the cell. The LMF exchanges UE capability information, auxiliary information, measurement information, etc. with the UE through the LPP protocol.

[0139] Positioning assistance communication mainly involves using positioning technology to assist the communication process, thereby improving the efficiency and accuracy of communication. High-precision positioning is one of the important indicators in the communication system, and is applied in many fields of mobile communication such as factories and intelligent robots. The current positioning method mainly extracts the physical location information by measuring the channel to obtain the multi-path information, and then assists the communication according to the physical location information.

[0140] Referring to FIG. 7, as an example, FIG. 7 shows a schematic diagram of a positioning scenario 600 suitable for embodiments of the present application. The principle in the positioning scenario 600 is to obtain the geometric position relationship between the access network device and the terminal device by measuring the straight-line distance or angle between the access network device and the terminal device, and according to the known position information of the access network device, the position of the terminal device can be calculated. As shown in FIG. 7, the angle of arrival of the access network device #1 and the terminal device is θ1, the angle of arrival of the access network device #2 and the terminal device is θ2, based on θ1 and θ2, and the position information of the access network device #1 and the access network device #2, the position of the terminal device can be calculated.

[0141] It can be understood that in the positioning scenario 600, a time difference of arrival (TDOA), multi-round trip time (multi-RTT), or the like can also be used to estimate the angle or time delay information of the terminal device relative to the access network device, so as to complete terminal positioning.

[0142] It can be understood that in the scenario shown in FIG. 7, the path of the signal from the sending end to the receiving end is a direct path, which can also be referred to as a line of sight (LOS) scenario. When the path of the signal from the sending end to the receiving end is affected by an obstacle, it is a non-direct path, which is referred to as a non-line of sight (NLOS) scenario.

[0143] Referring to FIG. 8, as an example, FIG. 8 shows a schematic diagram of another positioning scenario 700 suitable for embodiments of the present application. In the positioning scenario 700, the signal is reflected to the receiving end through a scatterer, and the measured time of arrival (TOA) / angle-of-arrival (AOA) / angle-of-departure (AOD) and the like correspond to the reflection path. As shown in FIG. 8, when the signal is from UE#2 to access network device#3, the signal is reflected to access network device#1 through scatterer#1 and scatterer#2.

[0144] Using the information of the scatterer in the environment, the SRS / PRS measurement channel multi-path angle delay and the like can be obtained by using a forward ray tracing algorithm combined with the environment. As shown in FIG. 8, two rays are reflected through the scatterer and finally intersect at a point or overlap area, and finally the positioning position can be obtained.

[0145] The commonly used positioning method assisted communication needs to determine the accurate position to realize the function of assisted communication. For example, in the above positioning method, the accurate physical position information is obtained based on the channel measurement and extraction of multi-path information, and then the physical position information is used to assist communication, resulting in a loss of information amount. Because the existing positioning process will have a loss of information amount, such as non-line of sight (NLOS) path energy, time delay, and the like, it is difficult to match the accurate atlas information in the channel atlas, which affects the communication performance. In addition, privacy security problems may be involved, and accurate physical position coordinate information cannot be obtained to assist communication.

[0146] In addition, there is also a two-level positioning matching scheme of the map, and the map / sensing assisted communication can be realized by using the two-level positioning matching method. First, the first-level coarse positioning is used to determine the map large grid position information, and the map management unit issues the channel map information corresponding to all small grids in the large grid position; then, the terminal device / access network device matches the channel map information corresponding to all small grids under the corresponding large grid according to the measured signal, and reports the index of the channel map information corresponding to the small grid, and the map management unit issues the channel map information after obtaining the matching index, realizes the two-level positioning matching of the map, and enables the assisted communication. Wherein, the large grid position information represents a relatively large physical range (such as x∈(0, 20) m, y∈(0, 20) m), and the small grid represents a relatively small physical range (such as x∈(0, 5) m, y∈(0, 5) m); the channel map information corresponding to the small grid includes the basis obtained by singular value decomposition (SVD) of the statistical channel in the grid, and the loss. The basis represents the statistical average of the covariance matrix of multiple channels H in the channel map grid, and the eigenvector after SVD decomposition is obtained.

[0147] Wherein, the first-level positioning is a kind of coarse positioning, which can use traditional positioning methods, such as global positioning system (GPS) positioning, Bluetooth positioning, AOA / TDOA positioning, fingerprint positioning, etc. Or use the environment and ray tracing positioning method.

[0148] The second level is to perform feature matching. Specifically, the following two matching methods are included:

[0149] (1) Autocorrelation matrix matching: R Q = v H (n)Qv(n);

[0150] The normalized eigenvector corresponding to the maximum eigenvalue of the measured signal is matched with the autocorrelation matrix RHH of the map, and the matching correlation result is obtained, wherein the feature matrix Q of the map is UU H , U represents all normalized eigenvectors of the channel H of the map stored signal, and v(n) represents the maximum eigenvector of the measured index signal. If R Q > Threshold, it is considered that the matching correlation is high. The grid corresponding to the maximum index R Q stores the information of the map.

[0151] (2) Eigenvector matching:

[0152] (the nth user);

[0153] Wherein P = UU H, U is the 3 feature vectors stored in the map, and P is the feature matrix composed of the 3 feature vectors. If R P > threshold, it is considered that the matching correlation is high. The index R P The largest grid corresponds to the information stored in the map.

[0154] However, the above two-stage positioning matching scheme also needs to obtain a physical position information and then obtain the map information of the corresponding physical grid through indexing, which is more dependent on actual positioning measurement, and it is difficult to adapt to scenes with large changes in physical environment.

[0155] In the construction of an environmental perception channel map and other communication applications, a grid-level channel feature library needs to be used to assist communication, so the position of the UE needs to be known in real time for application. As shown in FIG. 9, it is a schematic diagram of using a grid-level channel feature library to assist communication. A terminal device enters a specific area (grid), and can use a grid-level channel feature library to assist communication. However, due to the long period of sounding reference signals (SRSs) / positioning reference signals (PRSs), it is difficult to update the positioning information in real time to assist communication.

[0156] In the application of the map, an accurate physical position coordinate is not necessarily needed to assist communication, and the correlation of the channel reconstruction of the communication system can be used to achieve communication performance enhancement. The loss of part of the information quantity caused by the process of recovering the physical position information from the channel extraction of the multipath information and then assisting the communication according to the physical position information is avoided.

[0157] Therefore, in view of the problems that the existing channel map acquisition method needs positioning information and completely using the physical position information may affect the performance of the map-assisted communication in a complex environment, an embodiment of the present application provides a channel map acquisition method. A first network element receives a first grid in a channel map corresponding to a first feature of a wireless signal based on a second network element. The first network element can send first channel map information corresponding to the first grid to the second network element. The acquisition of the channel map does not depend on actual positioning measurement, and the performance of the channel map-assisted communication is improved.

[0158] Before introducing the scheme of the present application, the following points are explained.

[0159] (1) In the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing that certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0160] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or the index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, wherein the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be only indicated in part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be realized by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending opportunity of these sub-information can be the same or different.

[0161] (2) In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, or indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, or indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as "output" of the chip interface, and "receiving" can also be understood as "input" of the chip interface. In other words, sending and receiving can be carried out between devices, for example, between network devices and terminal devices, or can be carried out within a device, for example, between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0162] (3) In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referenced if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0163] (4) In the present application, "first", "second", and "#1", "#2", and "#n1", "#n2" and the like are only for convenience of description and are used for distinguishing objects, and are not used to limit the scope of the embodiments of the present application. They are not used to describe the order or sequence of the characteristics. It should be understood that the objects thus described can be interchanged under appropriate circumstances, so as to be able to describe schemes other than the embodiments of the present application.

[0164] (5) In the present application, "predefined" can mean standard protocol predefined, or can also mean pre-agreed or pre-negotiated between devices.

[0165] (6) In this application, the words "exemplary", "for example", and the like are used to mean example, illustration, or instance, and do not imply that the embodiment or design described is preferred or advantageous over other embodiments or designs. In the description of embodiments of the application, "of", "corresponding", and "corresponding" are sometimes mixed, and it should be pointed out that when the difference is not emphasized, the meaning expressed is consistent.

[0166] The method provided by the embodiments of the application will be described in detail below with reference to the drawings. The embodiments provided by the application can be applied to the communication system shown in FIG. 1 and the communication system shown in FIG. 2, without limitation.

[0167] In the following embodiments, the first network element and the second network element are exemplarily described. The first network element can be replaced by a component (such as a chip or a chip system or a circuit) applicable to the first network element, and the second network element can be replaced by a component (such as a chip or a chip system or a circuit) applicable to the second network element. The second network element can be a terminal device or an access network device.

[0168] As shown in FIG. 10, it is a flowchart of a method for acquiring a channel map provided by an embodiment of the application. Exemplarily, the method can include the following steps:

[0169] S1001. The first network element sends third information to the second network element.

[0170] Correspondingly, the second network element receives the third information.

[0171] Exemplarily, the first network element can be an SU, and the second network element can be an access network device.

[0172] In the embodiments of the application, the first network element can store the content of the channel map.

[0173] Specifically, the first network element stores at least one corresponding relationship between at least one grid, at least one value range corresponding to a first feature of a wireless signal, and at least one channel map information. One of the at least one corresponding relationship includes a first corresponding relationship between a first grid, a first value range corresponding to the first feature of the wireless signal, and first channel map information. The first grid is any one of the at least one grid; the first value range corresponding to the first feature of the wireless signal is one of the at least one value range corresponding to the first feature of the wireless signal; and the first channel map information is any one of the at least one channel map information.

[0174] In this embodiment, the first feature of the wireless signal is acquired by the second network element, and therefore the first network element sends third information to the second network element. The third information can indicate the above-mentioned first correspondence relationship, which includes the correspondence relationship between the first grid, the first value range corresponding to the first feature of the wireless signal, and the first channel map information; or the third information can also indicate the above-mentioned at least one correspondence relationship.

[0175] The first feature of the wireless signal is used to represent the characteristics of the wireless signal propagating on the wireless channel. For example, the first feature of the wireless signal includes at least one of the following: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, peak angle of arrival, angle of departure, identifier of beam, angle of beam, reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), reference signal receiving indicator (RSRI). The first feature of the wireless signal can be obtained by measuring the reference signal transmitted on the channel.

[0176] The first feature of the wireless signal can have a certain value range; the first feature of the wireless signal can also have a fixed value, or the quantized first feature of the wireless signal has a fixed value. For example, when the first feature includes multiple characteristics of the wireless signal, some characteristics can have a certain value range, and other characteristics can have a fixed value.

[0177] For example, the grid can be represented by the identifier of the grid, the index of the grid, or the name of the grid, etc.

[0178] For example, Table 1 illustrates at least one correspondence relationship between the identifier of at least one grid, at least one value range corresponding to the first feature of the wireless channel (such as k-factor, RSRP, time delay spread), and at least one channel map information:

[0179] Table 1

[0180] For example, the third information can be carried on at least one of the following signaling: RRC signaling, media access control control element (MAC CE), downlink control information (DCI).

[0181] Further, the third information can further include configuration information of the first reference signal, such as time-frequency resource position of the first reference signal, type of the first reference signal, and the like. The first reference signal is used for the second network element to measure the first characteristic of the wireless signal.

[0182] The above describes that the first network element indicates the correspondence relationship between the first grid, the first value range corresponding to the first characteristic of the wireless signal, and the first channel map information through the third information. The first correspondence relationship can be considered as a new correspondence relationship proposed in the present application. The correspondence relationship saved by the first network element in the prior art is at least one correspondence relationship between at least one grid, physical position information corresponding to the at least one grid, and at least one channel map information. However, as described in the background, due to privacy problems or real-time problems, the second network element can not be able to obtain the physical position information corresponding to the at least one grid, and therefore, the second network element cannot determine the grid corresponding to the physical position information according to the prior art. In the embodiment, the first network element can further save a correspondence relationship between the physical position information corresponding to the at least one grid and at least one value range corresponding to the first characteristic of the wireless signal, and further, the correspondence relationship can further include information of the at least one grid.

[0183] Alternatively, the first network element can also send the fourth information and the fifth information to the second network element.

[0184] The fourth information indicates a second correspondence relationship, and the second correspondence relationship includes a correspondence relationship between the first grid, the physical position information corresponding to the first grid, and the first map information. The fifth information indicates a third correspondence relationship, and the third correspondence relationship includes a correspondence relationship between the physical position information corresponding to the first grid and the first value range corresponding to the first characteristic of the wireless signal, and further, the third correspondence relationship can further include information of the at least one grid.

[0185] Therefore, the second network element can obtain the correspondence relationship between the first grid, the first value range corresponding to the first characteristic of the wireless signal, and the first map information without obtaining the physical position information corresponding to the first grid according to the above-mentioned second correspondence relationship and the third correspondence relationship.

[0186] As shown in Table 2 below, at least one correspondence relationship between the identification of at least one grid, the horizontal physical position information (physical position of X-axis and physical position of Y-axis) corresponding to the at least one grid, and at least one map information is illustrated:

[0187] Table 2

[0188] It can be understood that the physical position information corresponding to the grid can further include a physical position in the vertical direction Z-axis.

[0189] As shown in Table 3 below, an example of at least one corresponding relationship between the identification of at least one grid, the physical location information corresponding to the at least one grid, and at least one value range corresponding to the first characteristic (such as the k-factor, RSRP) of the wireless signal is shown:

[0190] Table 3

[0191] According to Table 3 above, if the second network element measures the k-factor value to be 3 and the RSRP to be -3, it can be determined that the corresponding physical location of the X-axis is within the range of 0-5, and the physical location of the Y-axis is within the range of 5-10. Then, according to Table 2 and the determined physical locations of the X-axis and the Y-axis, it can be determined that the corresponding map information is Base 2.

[0192] It can be understood that the second network element can obtain the above-mentioned first corresponding relationship, second corresponding relationship, and / or third corresponding relationship in other ways. For example, the network management (OAM) can configure the second network element. Therefore, the above-mentioned step S1001 is optional, and is represented by a dashed line in the figure.

[0193] S1002. The third network element sends a first reference signal to the second network element.

[0194] Correspondingly, the second network element receives the first reference signal.

[0195] For example, the third network element can be a UE.

[0196] For example, the first reference signal can be an SRS.

[0197] S1003. The second network element sends first information to the first network element.

[0198] Correspondingly, the first network element receives the first information.

[0199] After receiving the first reference signal, the second network element measures the first reference signal to obtain the measurement value of the first characteristic of the wireless signal, i.e., the first characteristic of the wireless signal is obtained based on the first reference signal.

[0200] Based on the measurement value of the first characteristic of the wireless signal, the second network element determines the first value range corresponding to the first characteristic of the wireless signal according to the above-mentioned first corresponding relationship, or the above-mentioned second corresponding relationship and third corresponding relationship, and further determines the identification of the corresponding first grid. For example, referring to Table 1, if the second network element measures the RSRP to be 4 dBm and the time delay spread to be 10-20 ns, it determines that the identification of the grid is 1.

[0201] After determining the identity of the first grid, the second network element sends first information to the first network element. The first information indicates the first grid in the channel map. For example, the first information includes the identity, index, or name of the first grid. The channel map corresponds to at least one grid, and the first grid is any one of the at least one grid. The first information is obtained based on the first characteristic of the wireless signal. For example, the second network element obtains a value corresponding to the first characteristic of the wireless signal by measuring the first reference signal, determines the first grid corresponding to the value according to each value range, and thus determines the first information.

[0202] It can be understood that the embodiment is described by taking uplink measurement as an example, that is, the UE sends SRS uplink, the access network device measures the SRS to obtain the measurement value of the first characteristic of the wireless signal, then determines the identity of the first grid, and sends the first information to the first network element. In fact, the scheme of the embodiment is also applicable to downlink measurement, that is, the access network device can send channel state information-reference signal (CSI-RS) to the UE, the UE measures the CSI-RS to obtain the measurement value of the first characteristic of the wireless signal, then determines the identity of the first grid, and sends the first information to the first network element. Alternatively, the UE reports the measurement value of the first characteristic of the wireless signal to the network device, and then the network device determines the identity of the first grid and sends the first information to the first network element.

[0203] S1004. The first network element determines the first channel map information.

[0204] The first network element stores the content of the channel map. After receiving the first information, the first network element determines the first channel map information corresponding to the first grid in the channel map indicated by the first information, and the first correspondence relationship, or the second correspondence relationship and the third correspondence relationship. For example, referring to Table 1, the first channel map information is determined to be base 1 according to the identity 1 of the first grid.

[0205] S1005. The first network element sends second information to the second network element.

[0206] Correspondingly, the second network element receives the second information.

[0207] After determining the first channel map information corresponding to the first grid, the first network element sends second information to the second network element to assist in improving subsequent communication performance. The second information indicates the first channel map information.

[0208] The first channel map information includes at least one channel feature of grid-related scatterer information, a channel statistical covariance matrix, an angle spectrum, a time delay spectrum, and path loss.

[0209] It can be understood that the first channel map information can also be sent to the UE or other network elements according to needs.

[0210] According to the channel map acquisition method provided in the embodiments of the present application, the first network element can send the first channel map information corresponding to the first grid to the second network element by receiving the first grid in the channel map corresponding to the first feature of the wireless signal, the channel map acquisition does not depend on actual positioning measurement, and the channel map assisted communication performance is improved. Furthermore, the channel map information is acquired by using the features of the wireless signal, the channel map assisted communication can be implemented without physical position information. Further, since the physical position information usually has low accuracy, the accuracy of acquiring the channel map information is improved by using the channel features of the wireless signal.

[0211] The above embodiments describe a scheme in which the second network element determines the first grid according to the first feature of the measured wireless signal and indicates the first grid to the first network element. The following embodiments will describe a scheme in which the second network element and the third network element both indicate the grid information to the first network element according to the features of the wireless signal measured by themselves, and the first network element indicates more accurate map information according to the grid information reported by the second network element and the third network element respectively.

[0212] As shown in FIG. 11, it is a flowchart of another channel map acquisition method provided in the embodiments of the present application. Exemplarily, the method can include the following steps:

[0213] S1101a. The first network element sends eighth information to the second network element.

[0214] Correspondingly, the second network element receives the eighth information.

[0215] The eighth information indicates a fourth correspondence relationship between the first grid set, the second feature of the wireless signal, the second value range, and the second channel map information.

[0216] S1101b. The first network element sends ninth information to the third network element.

[0217] Correspondingly, the third network element receives the ninth information.

[0218] The ninth information indicates a fifth correspondence relationship between the first grid, the first feature of the wireless signal, the first value range, and the first channel map information.

[0219] It can be understood that the embodiment does not limit the execution sequence of S1101b, and the first network element can send the ninth information to the third network element before step S1105.

[0220] Exemplarily, the first network element can be a SU; the second network element can be an access network device; and the third network element can be a UE.

[0221] In the embodiment of the application, the first network element can store the content of the channel map.

[0222] Specifically, the first network element stores at least one grid set, at least one second value range corresponding to the second characteristic of the wireless signal, at least one second map information, at least one grid in each grid set, at least one first value range corresponding to the first characteristic of the wireless signal, and at least one corresponding relationship between the at least one channel map information. One of the at least one corresponding relationship includes a first grid set, a second value range corresponding to the second characteristic of the wireless signal, second channel map information, a first grid, a first value range corresponding to the first characteristic of the wireless signal, and a corresponding relationship between the first channel map information. Wherein, the first grid set is any one of the at least one grid set; the second value range corresponding to the second characteristic of the wireless signal is any one of the at least one second value range corresponding to the second characteristic of the wireless signal; the first grid is any one of the first grid set; and the first value range corresponding to the first characteristic of the wireless signal is any one of the at least one first value range corresponding to the first characteristic of the wireless signal.

[0223] The second characteristic of the wireless signal is also used to represent the characteristic of the wireless signal carried on the channel. The second characteristic of the wireless signal includes at least one of the following: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, peak angle of arrival, angle of departure, identifier of beam, angle of beam, RSRP, RSRQ, and RSRI. The second characteristic of the wireless signal can be obtained by measuring the reference signal transmitted on the channel. It can be understood that the first characteristic of the wireless signal and the second characteristic of the wireless signal can be completely the same, partially the same, or completely different in the embodiment.

[0224] As shown in Table 4 below, the first network element stores the corresponding relationship between the identifier of the grid set, the identifier of at least one grid in the grid set, the range of angle, the range of time delay, and the channel map information:

[0225] Table 4

[0226] In Table 4, the second column indicates the value range corresponding to the second characteristic (angle) of the wireless signal; the fourth column and the fifth column indicate the value range corresponding to the first characteristic (angle and time delay) of the wireless signal; the base 1 in the channel map information indicates the second channel map information corresponding to the grid set with the identification of 1, the base 2 indicates the second channel map information corresponding to the grid set with the identification of 2; and the base 1.1, the base 1.2 and the base 1.3 in the channel map information respectively indicate the first channel map information corresponding to the grid with the identification of 1.1, 1.2 and 1.3, the base 1 includes the base 1.1, the base 1.2 and the base 1.3, and so on. Exemplarily, the angle in Table 4 can be an angle of departure or an angle of arrival.

[0227] The second characteristic of the wireless signal corresponding to the identification of the grid set includes part of the characteristic information of the wireless signal, such as the approximate range of the angle in Table 4; one grid set can include one or more grids, and the first characteristic of the wireless signal corresponding to the identification of the grid includes more characteristic information of the wireless signal, such as the finer range of the angle and the range of the time delay in Table 4. For another example, each path corresponds to different angle and time delay (such as angle 5° and time delay 10 ns). The uplink measurement is limited to the bandwidth, and the approximate range of the corresponding angle (i.e. which path or paths can be roughly determined) can be obtained, so the approximate range of the angle corresponding to the grid set can be indicated; in combination with the downlink measurement, the time delay on the angle (i.e. the path or paths) can be further obtained, the angle-time delay pair is formed, and the grid corresponding to the angle-time delay pair can be further matched.

[0228] Based on the correspondence relationship saved by the first network element shown in Table 4, the eighth information includes the correspondence relationship between the identification of the grid set, the range of the angle and the second channel map information as shown in Table 5:

[0229] Table 5

[0230] Based on the correspondence relationship saved by the first network element shown in Table 4, the ninth information includes the correspondence relationship between the identification of at least one grid in the grid set, the range of the angle, the range of the time delay and the first channel map information as shown in Table 6:

[0231] Table 6

[0232] The first / second characteristic of the wireless signal can have a certain value range; the first / second characteristic of the wireless signal can also have a fixed value, or the quantized first / second characteristic of the wireless signal has a fixed value.

[0233] Exemplarily, the grid can be represented by the identification of the grid, the index of the grid, the name of the grid, etc.

[0234] Exemplarily, the above-mentioned grid set can be represented by an identification of the grid set, an index of the grid set, a name of the grid set, etc.

[0235] Further, the above-mentioned eighth information can further comprise configuration information of the third reference signal, such as a time-frequency resource position of the third reference signal, a type of the third reference signal, etc. The third reference signal is used for the third network element to measure the first characteristic of the wireless signal.

[0236] The above-mentioned ninth information can further comprise configuration information of the second reference signal, such as a time-frequency resource position of the second reference signal, a type of the second reference signal, etc. The second reference signal is used for the second network element to measure the second characteristic of the wireless signal.

[0237] The above describes that the first network element indicates the first grid, the fifth corresponding relationship between the first value range corresponding to the first characteristic of the wireless signal and the first channel map information to the third network element through the ninth information. The fifth corresponding relationship can be considered as a new corresponding relationship proposed in the present application. However, as described in the background, due to privacy problems or real-time problems, the third network element can not be able to obtain the physical location information corresponding to the at least one grid, so the third network element cannot determine the grid set and / or the grid corresponding to the physical location information according to the at least one corresponding relationship between the at least one grid, the physical location information corresponding to the at least one grid and the at least one channel map information sent by the first network element in the prior art. In the embodiment, the first network element can further save the corresponding relationship between the at least one grid, the physical location information corresponding to the at least one grid and the at least one first value range corresponding to the first characteristic of the wireless signal. Alternatively, the first network element can also send the tenth information and the eleventh information to the third network element. The tenth information indicates the sixth corresponding relationship, and the sixth corresponding relationship comprises the corresponding relationship between the first grid, the physical location information corresponding to the first grid and the first channel map information; the eleventh information indicates the seventh corresponding relationship, and the seventh corresponding relationship comprises the corresponding relationship between the physical location information corresponding to the first grid and the first value range corresponding to the first characteristic of the wireless signal.

[0238] It can be understood that the second network element can obtain the above-mentioned fourth corresponding relationship through other ways. Exemplarily, it can be configured to the second network element by the network management through the OAM mode. Therefore, the above-mentioned step S1101a is optional, which is represented by a dashed line in the figure.

[0239] The third network element can obtain the fifth correspondence relationship, the sixth correspondence relationship and / or the seventh correspondence relationship in other manners. For example, the network management can configure the third network element through OAM. Therefore, step S1101b is optional, and is represented by a dashed line in the figure.

[0240] S1102. The third network element sends the second reference signal to the second network element.

[0241] Correspondingly, the second network element receives the second reference signal.

[0242] For example, the second reference signal can be an SRS.

[0243] S1103. The second network element sends the sixth information to the first network element.

[0244] Correspondingly, the first network element receives the sixth information.

[0245] After receiving the second reference signal, the second network element measures the second reference signal to obtain a measurement value of the second characteristic of the wireless signal, i.e., the second characteristic of the wireless signal is obtained based on the second reference signal.

[0246] Based on the measurement value of the second characteristic of the wireless signal, the second network element determines a second value range corresponding to the second characteristic of the wireless signal according to the fourth correspondence relationship, and further determines a corresponding first grid set. The channel map includes at least one grid set. The first grid set is any one of the at least one grid set. The first grid set includes a first grid and at least one second grid.

[0247] The second network element sends the sixth information to the first network element. The sixth information indicates the first grid set in the channel map. The sixth information is obtained based on the second characteristic of the wireless signal.

[0248] For example, referring to Table 4 and / or Table 5, the second network element measures the second reference signal to obtain an angle range of -5 to 5 (i.e., it can be roughly determined which radial or which radials), and the second network element determines that the identifier of the grid set corresponding to the angle range is grid set 1. The second network element sends the sixth information to the first network element, and the sixth information indicates grid set 1.

[0249] S1104. The first network element determines the second channel map information.

[0250] The first network element stores the content of the channel map. After receiving the sixth information, the first network element determines the second channel map information corresponding to the first grid set according to the fourth correspondence relationship.

[0251] For example, the sixth information indicates the identity of the grid set 1, and the first network element determines that the identity of the grid set 1 corresponds to the base 1 according to Table 4.

[0252] S1105. The first network element sends seventh information to the third network element.

[0253] Correspondingly, the third network element receives the seventh information.

[0254] After the first network element determines the second channel map information, the first network element sends the seventh information to the third network element. The seventh information indicates the second channel map information.

[0255] It can be understood that in the embodiment, the first network element sends the ninth information to the third network element in the above step S1101b (i.e., before step S1105), which is a possible implementation. In this way, the third network element can improve the execution efficiency of the subsequent process by pre-acquiring the fifth correspondence relationship or the sixth correspondence relationship, the seventh correspondence relationship.

[0256] In another possible implementation, the first network element can not send the ninth information to the third network element in the above step S1101b, but in step S1105, i.e., in the seventh information, carries the correspondence relationship between the identity of at least one grid of the first grid set, the range of at least one angle, the range of at least one time delay, and at least one first channel map information, i.e., the 2-4 rows of Table 6; or the first network element can also send the above correspondence relationship after step S1105. In this way, the signaling overhead can be saved.

[0257] S1106. The second network element sends a third reference signal to the third network element.

[0258] Correspondingly, the third network element receives the third reference signal.

[0259] Exemplarily, the third reference signal is a CSI-RS.

[0260] S1107. The third network element sends first information to the first network element.

[0261] Correspondingly, the first network element receives the first information.

[0262] After the third network element receives the third reference signal, the third network element measures the third reference signal to obtain a measurement value of the first characteristic of the wireless signal, i.e., the first characteristic of the wireless signal is obtained based on the third reference signal. Exemplarily, when the third network element measures the third reference signal, the third network element can measure the third reference signal in the measurement range corresponding to the second channel map information (such as the angle spectrum) indicated by the seventh information to obtain the measurement value of the first characteristic of the wireless signal.

[0263] The third network element determines a first value range corresponding to the first characteristic of the wireless signal according to the fifth correspondence relationship or the sixth correspondence relationship or the seventh correspondence relationship, and further determines a corresponding first grid. The first grid belongs to the first grid set.

[0264] The third network element sends the first information to the first network element. The first information indicates the first grid in the channel map, and the first information is obtained based on the first characteristic of the wireless signal.

[0265] For example, referring to Table 4 and / or Table 6, after receiving the seventh information, the third network element determines that the identification of the first grid is 1.3 according to the base 1 indicated by the seventh information and the range of the angle is -5-0° and the time delay is 10-15ns obtained by measuring the third reference signal. The third network element sends the first information to the first network element, and the first information indicates the identification 1.3 of the first grid. Specifically, the third network element receives the second channel map information corresponding to the first grid set, for example, the second channel map information includes an angle spectrum, and it can be known that the range of the angle is -5-5, so as to know the time delay on which radial or radials are measured, and determine the angle corresponding to the radial or radials. Then, according to the fifth correspondence relationship or the sixth correspondence relationship or the seventh correspondence relationship, it is determined that the identification of the first grid is 1.3. In this way, the third network element can measure in a given range or condition, thereby reducing the measurement time and processing complexity of the third network element.

[0266] S1108. The first network element determines the first channel map information.

[0267] After receiving the first information, the first network element determines the first channel map information corresponding to the first grid according to the fifth correspondence relationship (or according to the sixth correspondence relationship or the seventh correspondence relationship).

[0268] For example, referring to Table 4, the first network element determines that the first channel map information is the base 1.3 according to the identification 1.3 of the first grid indicated by the first information.

[0269] S1109. The first network element sends the second information to the second network element.

[0270] Correspondingly, the second network element receives the second information.

[0271] After determining the first channel map information, the first network element sends the second information to the second network element. The second information indicates the first channel map information.

[0272] According to the method for acquiring a channel map provided in the embodiments of the present application, the second network element can obtain the measurement value of the second characteristic of the wireless signal by measuring the second reference signal, determine the first grid set based on the measurement value of the second characteristic of the wireless signal, and indicate the first grid set to the first network element; the first network element can send the second channel map information corresponding to the first grid set to the third network element based on the first grid set; the third network element determines the first grid based on the second channel map information and the measurement value of the first characteristic of the wireless signal obtained by measuring the third reference signal, and indicates the first grid to the first network element; the first network element can send the first channel map information corresponding to the first grid based on the first grid. The approximate range of the second characteristic of the wireless signal is determined through uplink measurement, the approximate range of the second characteristic of the wireless signal can determine the measurement range of the first characteristic of the wireless signal and the first grid set, and further through downlink measurement, the first characteristic of the wireless signal can be measured in the determined measurement range of the first characteristic of the wireless signal, so that the first grid in the first grid set can be determined based on the measurement value of the first characteristic of the wireless signal, and the first channel map information corresponding to the first grid can be acquired. The above scheme can improve the accuracy of the acquired channel map information.

[0273] In the present application, "sending information to (for example, the first network element)" or the related illustration in the drawings can be understood as that the destination of the information is the first network element. It can include directly or indirectly sending information to the first network element. "Receiving information from (for example, the first network element)" or "receiving information from (for example, the first network element)", or the related illustration in the drawings can be understood as that the source of the information is the first network element, which can include directly or indirectly receiving information from the first network element. The information between the source and the destination of the information transmission can be processed as necessary, for example, format change, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be similarly understood, and will not be described here.

[0274] It can be understood that the first network element, the second network element and the third network element are taken as an example in the present application to illustrate the execution subject of the interactive illustration, but the present application does not limit the execution subject of the interactive illustration. For example, the first network element in the method provided in the present application can also be a chip, a chip system or a processor applied to the first network element, and can also be a logic node, a logic module or software capable of realizing all or part of the function of the first network element; the second network element in the method provided in the present application can also be a chip, a chip system or a processor applied to the second network element, and can also be a logic node, a logic module or software capable of realizing all or part of the function of the second network element; the third network element in the method provided in the present application can also be a chip, a chip system or a processor applied to the third network element, and can also be a logic node, a logic module or software capable of realizing all or part of the function of the third network element.

[0275] It should be understood that, in order to realize the functions in the above-mentioned embodiments, the first network element, the second network element and the third network element comprise corresponding hardware structures and / or software modules for performing respective functions. Those skilled in the art should easily realize that, in combination with the units and method steps of the examples described in the embodiments disclosed in the present application, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is realized in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0276] FIG. 12 and FIG. 13 are structural schematic diagrams of possible communication apparatuses provided by the embodiments of the present application. These communication apparatuses can be used to realize the functions of the first network element or the second network element in the above-mentioned method embodiments, and thus can also realize the beneficial effects possessed by the above-mentioned method embodiments.

[0277] As shown in FIG. 12, the communication apparatus 1200 comprises a processing unit 1210 and a transceiver unit 1220. The communication apparatus 1200 is used to realize the functions of the first network element, the second network element or the third network element in the above-mentioned method embodiments shown in FIG. 3.

[0278] When the communication apparatus 1200 is used for the functions of the first network element: the processing unit 1210 is configured to generate the third information in step S1001 and / or perform step S1004 in the embodiment shown in FIG. 10, and the transceiver unit 1220 is configured to realize at least one of the steps S1001, S1003, S1005 performed by the first network element in the embodiment shown in FIG. 10; or, the processing unit 1210 is configured to generate the eighth information in step S1101a, the ninth information in step S1101b, perform steps S1104 and / or S1108 in the embodiment shown in FIG. 11, and the transceiver unit 1220 is configured to realize at least one of the steps S1101a, S1101b, S1103, S1105, S1107, S1109 performed by the first network element in the embodiment shown in FIG. 11.

[0279] When the communication apparatus 1200 is used to realize the functions of the second network element: the processing unit 1210 is configured to generate the first information in step S1003 in the embodiment shown in FIG. 10, and the transceiver unit 1220 is configured to realize at least one of the steps S1001, S1002, S1003, S1005 performed by the second network element in the embodiment shown in FIG. 10; or, the processing unit 1210 is configured to generate the sixth information in step S1103 and / or the third reference signal in step S1106 in the embodiment shown in FIG. 11, and the transceiver unit 1220 is configured to realize at least one of the steps S1101a, S1102, S1103, S1105, S1106, S1109 performed by the second network element in the embodiment shown in FIG. 11.

[0280] When the communication device 1200 is used to implement the function of the third network element, the processing unit 1210 is configured to generate the first reference signal of step S1002 in the embodiment shown in FIG. 10, and the transceiver unit 1220 is configured to implement the function of the third network element in step S1002 in the embodiment shown in FIG. 10; or the processing unit 1210 is configured to generate the first reference signal of step S1102 and / or the first information in step S1107 in the embodiment shown in FIG. 11, and the transceiver unit 1220 is configured to implement at least one function of the third network element in steps S1101b, S1102, S1105, S1106, S1107 in the embodiment shown in FIG. 11.

[0281] More detailed descriptions of the processing unit 1210 and the transceiver unit 1220 can be directly obtained by referring to the related descriptions in the method embodiments shown in FIG. 10 or FIG. 11, which will not be repeated here.

[0282] When the communication device is a chip applied to the first network element, the first network element chip implements the function of the first network element in the above-mentioned method embodiments. The first network element chip receives information from other modules (such as a radio frequency module or an antenna) in the first network element, and the information is sent by the second network element to the first network element; or the first network element chip sends information to other modules (such as a radio frequency module or an antenna) in the first network element, and the information is sent by the first network element to the second network element.

[0283] When the communication device is a chip applied to the second network element, the second network element chip implements the function of the second network element in the above-mentioned method embodiments. The second network element chip receives information from other modules (such as a radio frequency module or an antenna) in the second network element, and the information is sent by the first network element to the second network element; or the second network element chip sends information to other modules (such as a radio frequency module or an antenna) in the second network element, and the information is sent by the second network element to the first network element.

[0284] In addition, it should be noted that the aforementioned transceiver unit and / or processing unit can be implemented by a virtual module, for example, the processing unit can be implemented by a software function unit or a virtual device, and the transceiver unit can be implemented by a software function or a virtual device. Alternatively, the processing unit or the transceiver unit can also be implemented by an entity device, for example, if the device is implemented by a chip / chip circuit, the transceiver unit can be an input / output circuit and / or a communication interface, which performs an input operation (corresponding to the aforementioned receiving operation) and an output operation (corresponding to the aforementioned sending operation); the processing unit is an integrated processor or a microprocessor or an integrated circuit.

[0285] As shown in FIG. 13, the communication apparatus 1300 includes a processor 1310, and can further include an interface circuit 1320. The processor 1310 and the interface circuit 1320 are coupled to each other. It can be understood that the interface circuit 1320 can be a transceiver or an input / output interface. Optionally, the communication apparatus 1300 can further include a memory 1330 (shown in dashed line in the figure) for storing instructions executed by the processor 1310 or storing input data required by the processor 1310 for executing instructions or storing data generated after the processor 1310 executes instructions.

[0286] When the communication apparatus 1200 is used for the function of the first network element: the processor 1310 is configured to generate the third information in step S1001 in the embodiment shown in FIG. 10 and / or execute step S1004, and the interface circuit 1320 is configured to implement at least one of the functions performed by the first network element in steps S1001, S1003, S1005 in the embodiment shown in FIG. 10; or the processor 1310 is configured to generate the eighth information in step S1101a, the ninth information in step S1101b, execute steps S1104 and / or S1108 in the embodiment shown in FIG. 11, and the interface circuit 1320 is configured to implement at least one of the functions performed by the first network element in steps S1101a, S1101b, S1103, S1105, S1107, S1109 in the embodiment shown in FIG. 11.

[0287] When the communication apparatus 1200 is used for the function of the second network element: the processor 1310 is configured to generate the first information in step S1003 in the embodiment shown in FIG. 10, and the interface circuit 1320 is configured to implement at least one of the functions performed by the second network element in steps S1001, S1002, S1003, S1005 in the embodiment shown in FIG. 10; or the processor 1310 is configured to generate the sixth information in step S1103 and / or the third reference signal in step S1106 in the embodiment shown in FIG. 11, and the interface circuit 1320 is configured to implement at least one of the functions performed by the second network element in steps S1101a, S1102, S1103, S1105, S1106, S1109 in the embodiment shown in FIG. 11.

[0288] When the communication apparatus 1200 is used for the function of the third network element: the processor 1310 is configured to generate the first reference signal in step S1002 in the embodiment shown in FIG. 10, and the interface circuit 1320 is configured to implement the function of the third network element in step S1002 in the embodiment shown in FIG. 10; or the processor 1310 is configured to generate the first reference signal in step S1102 and / or the first information in step S1107 in the embodiment shown in FIG. 11, and the interface circuit 1320 is configured to implement at least one of the functions of the third network element in steps S1101b, S1102, S1105, S1106, S1107 in the embodiment shown in FIG. 11.

[0289] More detailed description of the processor 1310 and the interface circuit 1320 can be directly obtained by referring to the related description in the method embodiments shown in FIG. 10 or FIG. 11, and will not be repeated here.

[0290] The division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, another division manner can be used. In addition, the function modules in each example of the present application can be integrated in one processor, or can be physically separated, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software function module.

[0291] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices (PLD), transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0292] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program or instructions. When the computer program or instructions are executed, the method in the above embodiments is implemented.

[0293] The embodiments of the present application further provide a computer program product containing instructions, which, when executed on a computer, cause the computer to perform the method in the above embodiments.

[0294] The embodiments of the present application further provide a communication system, which includes the communication device.

[0295] The embodiments of the present application further provide a circuit, which is coupled with a memory and is used to execute the method shown in the above embodiments. The circuit can include a chip circuit.

[0296] When the communication device is a module applied to the second network element, the second network element module implements the functions of the second network element in the method embodiments. The second network element module receives information from other modules (such as a radio frequency module or an antenna) in the second network element, and the information is sent by the UE to the second network element; or the second network element module sends information to other modules (such as a radio frequency module or an antenna) in the second network element, and the information is sent by the second network element to the UE. The second network element module herein can be a baseband chip of the second network element, or a CU, a DU or other module, or a device under an open radio access network (O-RAN) architecture, such as an open CU, an open DU, etc.

[0297] It should be noted that one or more of the above units or units can be realized by software, hardware or a combination of both. When any of the above units or units is realized by software, the software exists in the form of computer program instructions and is stored in the memory, and the processor can be used to execute the program instructions and realize the above method flow.

[0298] In this application, the processor can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or all or part of the circuits of the foregoing devices for implementing processing functions. The methods, steps and logic block diagrams disclosed in this application can be implemented or executed by the processor. The general processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this application can be directly embodied as hardware processor execution or executed by a combination of hardware and software modules in the processor.

[0299] When the above units or units are realized by hardware, the hardware can be any one or any combination of CPU, microprocessor, digital signal processing (DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, SoC, FPGA, PLD, special purpose digital circuit, hardware accelerator or non-integrated discrete device, which can run necessary software or be independent of software to execute the above method flow.

[0300] Optionally, the embodiment of the present application further provides a chip system, comprising: at least one processor and an interface, the at least one processor is coupled with a memory through the interface, when the at least one processor runs a computer program or an instruction in the memory, the chip system executes the method in any method embodiment described above. Optionally, the chip system can be composed of a chip, or can contain a chip and other discrete devices, and the embodiment of the present application does not make specific limitation to this.

[0301] The memory in the present application can also be a circuit or other any device capable of realizing a storage function, used for storing program instructions and / or data. The memory can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited to this. For example, the memory can be a non-volatile memory such as a digital versatile disc (DVD), a hard disk drive (HDD) or a solid-state drive (SSD), etc., and can also be a volatile memory such as a random-access memory (RAM).

[0302] It should be understood that, in the description of the present application, unless otherwise specified, “ / ” represents that the objects associated before and after are in an “or” relationship, for example, A / B can represent A or B; wherein A, B can be singular or plural. And, in the description of the present application, unless otherwise specified, “multiple” means two or more than two. “At least one of the following (one)” or similar expressions means any combination of these items, including any combination of single item (one) or multiple items. For example, at least one of a, b, or c, can represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c can be single or multiple.

[0303] In the above embodiments, all or part can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode.

[0304] Although the present application is described herein in conjunction with various embodiments, other variations and modifications of the disclosed embodiments can be understood and implemented by those skilled in the art through viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. Some measures described in mutually different dependent claims can be combined and produce a good result.

[0305] It can be understood that various numerical numbers involved in the embodiments of the present application are only for convenient differentiation and do not limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined by its function and inherent logic.

[0306] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can refer to the relevant description of other embodiments.

[0307] The components in the device of the embodiments of the present application can be combined, divided and deleted according to actual needs. Those skilled in the art can combine or combine the features of different embodiments and different embodiments described in the specification.

[0308] In this application, under the premise of no logical contradiction, examples can be referred to each other, for example, methods and / or terms between method embodiments can be referred to each other, for example, functions and / or terms between device embodiments can be referred to each other, and for example, functions and / or terms between device examples and method examples can be referred to each other.

Claims

1. A method of acquiring a channel map, characterized by, The method comprises: receiving seventh information, the seventh information indicating second channel map information corresponding to a first grid set, the first grid set comprising a first grid and further comprising at least one second grid; receiving a third reference signal; sending first information, the first information indicating the first grid, the first information being obtained based on a first feature of a wireless signal, the first feature of the wireless signal being obtained based on the third reference signal.

2. The method of claim 1, wherein, The method further comprises: receiving ninth information, the ninth information indicating a fifth correspondence relationship, the fifth correspondence relationship comprising a correspondence relationship between the first grid, a first value range corresponding to the first feature of the wireless signal, and first channel map information.

3. The method of claim 1, wherein, The method further comprises: receiving tenth information, the tenth information indicating a sixth correspondence relationship, the sixth correspondence relationship comprising a correspondence relationship between the first grid, physical location information corresponding to the first grid, and first channel map information; receiving eleventh information, the eleventh information indicating a seventh correspondence relationship, the seventh correspondence relationship comprising a correspondence relationship between physical location information corresponding to the first grid and a first value range corresponding to the first feature of the wireless signal.

4. The method of any one of claims 1-3, wherein, The first feature of the wireless signal comprises at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, peak angle of arrival, angle of departure, identifier of a beam, beam angle, reference signal received power, reference signal received quality, and reference signal received indication.

5. A method of acquiring a channel map, characterized by, The method comprises: receiving first information, the first information indicating a first grid in a channel map, the channel map corresponding to at least one grid, the first grid being any one of the at least one grid, the first information being obtained based on a first feature of a wireless signal; determining first channel map information, the first channel map information being channel map information in the channel map corresponding to the first grid; sending second information, the second information indicating the first channel map information.

6. The method of claim 5, wherein, The method further comprises: sending third information, the third information indicating a first correspondence relationship, the first correspondence relationship comprising a correspondence relationship between the first grid, a first value range corresponding to the first feature of the wireless signal, and the first channel map information.

7. The method of claim 5, wherein, The method further comprises: sending fourth information, the fourth information indicating a second correspondence relationship, the second correspondence relationship comprising a correspondence relationship between the first grid, physical location information corresponding to the first grid, and the first channel map information; sending fifth information, the fifth information indicating a third correspondence relationship, the third correspondence relationship comprising a correspondence relationship between physical location information corresponding to the first grid and a first value range corresponding to the first feature of the wireless signal.

8. The method of any one of claims 5-7, wherein, The first feature of the wireless signal comprises at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, peak angle of arrival, angle of departure, identifier of a beam, beam angle, reference signal received power, reference signal received quality, and reference signal received indication.

9. The method of any one of claims 5-8, wherein, The method further comprises: receiving sixth information, the sixth information indicating a first grid set in the channel map, the channel map comprising at least one grid set, the first grid set comprising the first grid and further comprising at least one second grid, the sixth information being derived based on a second characteristic of the wireless signal; sending seventh information, the seventh information indicating second channel map information corresponding to the first grid set, the second channel map information comprising the first channel map information.

10. The method of claim 9, wherein, The method further comprises: sending eighth information, the eighth information indicating a fourth correspondence relationship, the fourth correspondence relationship comprising a correspondence relationship between the first grid set, a second value range corresponding to the second characteristic of the wireless signal, and the second channel map information.

11. The method of claim 9 or 10, wherein, The method further comprises: sending ninth information, the ninth information indicating a fifth correspondence relationship, the fifth correspondence relationship comprising a correspondence relationship between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

12. The method of claim 9 or 10, wherein, The method further comprises: sending tenth information, the tenth information indicating a sixth correspondence relationship, the sixth correspondence relationship comprising a correspondence relationship between the first grid, physical location information corresponding to the first grid, and the first channel map information; sending eleventh information, the eleventh information indicating a seventh correspondence relationship, the seventh correspondence relationship comprising a correspondence relationship between the physical location information corresponding to the first grid and the first value range corresponding to the first characteristic of the wireless signal.

13. The method of any one of claims 9-12, wherein, The second characteristic of the wireless signal comprises at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, peak angle of arrival, angle of departure, identifier of a beam, beam angle, reference signal received power, reference signal received quality, and reference signal received indication.

14. The method of any one of claims 5-13, wherein, The first channel map information comprises at least one channel characteristic of: grid-associated scatterer information, channel statistical covariance matrix, angle spectrum, time delay spectrum, and path loss.

15. A method of acquiring a channel map, characterized by, The method comprises: receiving a first reference signal; determining first information, the first information indicating a first grid in a channel map, the channel map corresponding to at least one grid, the first grid being any one of the at least one grid, the first information being derived based on a first characteristic of a wireless signal, the first characteristic of the wireless signal being derived based on the first reference signal; sending the first information; receiving second information, the second information indicating first channel map information, the first channel map information being channel map information corresponding to the first grid in the channel map.

16. The method of claim 15, wherein, The method further comprises: receiving third information, the third information indicating a first correspondence relationship, the first correspondence relationship comprising a correspondence relationship between the first grid, a first value range corresponding to the first characteristic of the wireless signal, and the first channel map information.

17. The method of claim 15, wherein, The method further comprises: receiving fourth information, the fourth information indicating a second correspondence relationship, the second correspondence relationship comprising a correspondence relationship between the first grid, physical location information corresponding to the first grid, and the first channel map information; receive fifth information, the fifth information indicating a third correspondence relationship, the third correspondence relationship including a correspondence relationship between physical position information corresponding to the first grid and a first value range corresponding to a first feature of the wireless signal.

18. The method of any one of claims 15-17, wherein, The first feature of the wireless signal includes at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, angle of arrival peak, angle of departure, identity of a beam, beam angle, reference signal received power, reference signal received quality, reference signal received indication.

19. The method of any one of claims 15-18, wherein, The method further includes: receiving a second reference signal; transmitting sixth information, the sixth information indicating a first grid set in the channel map, the channel map including at least one grid set, the first grid set including the first grid and further including at least one second grid, the sixth information being obtained based on a second feature of a wireless signal, the second feature of the wireless signal being obtained based on the second reference signal.

20. The method of claim 19, wherein, The method further includes: receiving eighth information, the eighth information indicating a fourth correspondence relationship, the fourth correspondence relationship including a correspondence relationship between the first grid set, a second value range corresponding to a second feature of a wireless signal, and second channel map information.

21. The method of claim 19 or 20, wherein, The second feature of the wireless signal includes at least one of: time delay, time delay spread, k-factor, number of multipaths, angle of arrival, angle of arrival peak, angle of departure, identity of a beam, beam angle, reference signal received power, reference signal received quality, reference signal received indication.

22. The method of any one of claims 15-21, wherein, The first channel map information includes at least one channel feature: grid-associated scatterer information, channel statistical covariance matrix, angle spectrum, time delay spectrum, path loss.

23. A communications device, characterized by A unit for implementing the method of any one of claims 1-4, or a unit for implementing the method of any one of claims 5-14, or a unit for implementing the method of any one of claims 15-22.

24. A communications device, characterized by A processor and an interface circuit, the interface circuit being used for receiving signals from other communication devices outside the communication device and transmitting the signals to the processor or transmitting signals from the processor to other communication devices outside the communication device, the processor being used for implementing the method of any one of claims 1-4, or for implementing the method of any one of claims 5-14, or for implementing the method of any one of claims 15-22, through a logic circuit or executing code instructions.

25. The communication apparatus according to claim 24, wherein, The communication device is a chip.

26. A chip module, characterized by A transceiver assembly and a chip, the chip being used for executing the method of any one of claims 1-4, or for executing the method of any one of claims 5-14, or for executing the method of any one of claims 15-22.

27. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by a processor to implement the method of any one of claims 1-4, or for executing the method of any one of claims 5-14, or for executing the method of any one of claims 15-22.

28. A computer program product, characterised in that, The computer program product comprises program instructions involved, which, when executed, implement the method as claimed in any one of claims 1-4, or implement the method as claimed in any one of claims 5-14, or implement the method as claimed in any one of claims 15-22.

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