Near-field positioning method, and communication apparatus

Abstract

Provided in the present application are a near-field positioning method, and a communication apparatus. The method comprises: a terminal device measuring N reference signals which correspond to N beams from a network device, so as to acquire RSRPs corresponding to the N beams, wherein N is a positive integer; and the terminal device determining the position of the terminal device on the basis of the RSRPs corresponding to the N beams and distances and angles corresponding to the N beams, wherein the distance and angle corresponding to any beam are the distance and angle of the central position of the beam relative to a reference antenna of the network device. The method defines how to position a terminal device within a near-field communication range.

Description

Near-field positioning method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 30, 2023, with application number 202311435298.4 and application name “Near-field positioning method and communication device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a near-field positioning method and a communication device. Background Art

[0003] As antenna panels grow larger and communication frequency bands increase, the near-field communication range of base stations may be further expanded. For example, the communication radius of the near-field communication range can reach tens or even hundreds of meters, making near-field communication possible in the future. Positioning methods in far-field communication are generally based on the plane wave assumption, and the isophase surface of a plane wave is a plane. However, the plane wave assumption does not hold true in the near field. Near-field communication must be modeled based on a spherical wave model, and the isophase surface during electromagnetic wave propagation is a sphere. Since existing positioning technologies are based on the plane wave assumption in far-field communication, how to achieve positioning of terminal devices within the near-field communication range has become an urgent problem to be solved.

[0004] Summary of the Invention

[0005] The present application provides a near-field positioning method and communication device, which clarifies the positioning of a terminal device within a near-field communication range. For ease of description, the following description is based on an example of execution by a terminal device.

[0006] In a first aspect, a near-field positioning method is provided. The method can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation.

[0007] The method includes: the terminal device measures N reference signals corresponding to N beams from the network device to obtain RSRPs corresponding to the N beams, where N is a positive integer; the terminal device determines the position of the terminal device based on the RSRPs corresponding to the N beams and the distances and angles corresponding to the N beams, wherein the distance corresponding to the first beam is the distance between the center position of the first beam and the reference antenna of the network device, the angle corresponding to the first beam is the angle of the center position of the first beam relative to the reference antenna, and the first beam is any one of the N beams.

[0008] It can be understood that when this method is applied in near field communication, the N beams are all beams formed by spherical waves.

[0009] It can also be understood that the N RSRPs obtained above correspond one-to-one to the N reference signals measured, the N reference signals correspond one-to-one to the N beams, and therefore, the N beams correspond one-to-one to the N RSRPs.

[0010] It can also be understood that this method is applicable to downlink positioning, and in this method, the target terminal device calculates its own position information.

[0011] The above technical solution clarifies that within the near-field communication range, the terminal device can be positioned based on the measured RSRP corresponding to the beam, as well as the distance and angle information corresponding to the beam.

[0012] In certain implementations of the first aspect, N is equal to 1, and the N beams are beams with the largest RSRP among at least one beam received by the terminal device from the network device.

[0013] It can be understood that in this method, the position determined based on the distance and angle corresponding to the beam with the maximum RSRP is the center position of the beam with the maximum RSRP. That is, in this method, the center position of the beam with the maximum RSRP is used as the position of the terminal device. This technical solution is easy to implement and relatively simple to calculate.

[0014] In certain implementations of the first aspect, N is greater than 1, and the terminal device determines the position of the terminal device based on the RSRP corresponding to the N beams and the distance and angle corresponding to the N beams, including: the terminal device determines the position of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam and the distance and angle corresponding to the N beams, wherein the reference beam is any one of the N beams.

[0015] The above technical solution can improve positioning accuracy based on the RSRP corresponding to multiple beams and the corresponding distance and angle information. This positioning method can be applied to positioning services with higher positioning accuracy requirements.

[0016] In certain implementations of the first aspect, the method also includes: the terminal device receives a first request message from a positioning management function LMF, the first request message is used to request positioning measurement of the terminal device; the terminal device sends a first request response message to the LMF, the first request response message includes the location information of the terminal device.

[0017] In certain implementations of the first aspect, the method also includes: the terminal device receives first information from the positioning management function LMF, the first information includes at least one of the following parameters: identifiers of N reference signal resources corresponding to the N reference signals, configuration information of the N reference signals, information on the distance and angle corresponding to any one of the N beams, and relative values ​​of the field strength of the N reference signals at multiple first positions corresponding to multiple first combinations, wherein the multiple combinations and the multiple first positions correspond one-to-one, the first combination includes a first distance and a first angle, and the first distance and the first angle are used to determine the corresponding first position.

[0018] In certain implementations of the first aspect, the terminal device determines the position of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam and the distance and angle corresponding to the N beams, including: the terminal device determines the position of the terminal device based on the RSRP ratio of the N beams, the relative values ​​of the field strengths of the N reference signals at multiple first positions corresponding to multiple first combinations, and multiple first combinations.

[0019] In the above technical solution, the terminal device can compare the relative values ​​of the RSRP of the N beams measured by the terminal device at the solved position with the relative values ​​of the RSRP of the N beams theoretically measured at multiple preset first positions, and select a first position that meets certain conditions from the multiple first positions as the position of the terminal device. Thereafter, the position of the terminal device is determined based on the corresponding distance and angle of the first position.

[0020] In certain implementations of the first aspect, the method further includes: the terminal device receiving N reference signals from the network device on N reference signal resources, where the N reference signal resources correspond to different frequency domain units.

[0021] It is understandable that the network device may send multiple beams for positioning to the terminal device. When resources are limited, multiple beams may be sent in a time-division manner, which may increase the positioning delay or reduce the accuracy and real-time performance of positioning. For example, in the above technical solution, the network device can allocate different frequency domain units to different beams, and precode different frequency domain units of the reference signals corresponding to different beams respectively. In this way, the network device can simultaneously send different beams to the terminal device based on different frequency domain units. Compared with sending different beams in time division, it can reduce the positioning delay and obtain real-time positioning results.

[0022] In certain implementations of the first aspect, the first information further includes an identifier of a frequency domain unit corresponding to any reference signal resource among the N reference signal resources.

[0023] In a second aspect, a near-field positioning method is provided. The method can be performed by a terminal device, or can also be performed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on an example of a terminal device performing the method.

[0024] The method includes: a terminal device measures at least one reference signal corresponding to at least one beam from a network device to obtain an RSRP corresponding to at least one beam; the terminal device sends first information to a positioning management function LMF, wherein the first information indicates a reference signal resource corresponding to a beam with the largest RSRP among at least one beam; or, the first information indicates the RSRP corresponding to N beams or the ratio of the RSRP corresponding to N beams to the RSRP corresponding to a reference beam, wherein N is a positive integer and the reference beam is any one of the N beams.

[0025] If the first information indicates the reference signal resource corresponding to the beam with the largest RSRP among at least one beam, for example, the first information may specifically include an identifier of the reference signal resource corresponding to the beam with the largest RSRP among at least one beam.

[0026] If the first information indicates the RSRP corresponding to N beams or the ratio of the RSRP corresponding to N beams to the RSRP corresponding to the reference beam, for example, the first information may also include an identifier of the reference signal resources corresponding to the N beams in at least one beam, wherein one identifier indicates one reference signal resource.

[0027] It can be understood that when this method is applied in near-field communication, the N beams are all beams formed by spherical waves.

[0028] It can also be understood that this method is applicable to downlink positioning, and that this method is for LMF to calculate its own position information.

[0029] The above technical solution clarifies that within the near-field communication range, the terminal device can be positioned based on the measured RSRP corresponding to the beam, as well as the distance and angle information corresponding to the beam.

[0030] Regarding the beneficial effects of the first information indicating the identifier of the beam with the largest RSRP among at least one beam, or the first information indicating the identifier of N beams among at least one beam, and the RSRP corresponding to the N beams or the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam, please refer to the description of the first aspect and will not be repeated here.

[0031] In certain implementations of the second aspect, the method also includes: the terminal device receives a first request message from the LMF, the first request message is used to request positioning measurement of the terminal device; the terminal device sends first information to the positioning management function LMF, including: the terminal device sends a first request response message to the LMF, the first request response message includes the first information.

[0032] In certain implementations of the second aspect, the method further includes: the terminal device receives second information from the LMF, the second information including at least one of the following parameters: an identifier of at least one reference signal resource, configuration information of at least one reference signal, wherein the at least one reference signal resource includes a reference signal resource corresponding to each reference signal in at least one reference signal.

[0033] In certain implementations of the second aspect, the method further includes: the terminal device receives at least one reference signal from the network device on different frequency domain units of a reference signal resource corresponding to at least one reference signal, and the at least one reference signal resource corresponds to different frequency domain units.

[0034] It is understandable that the network device may send multiple beams for positioning to the terminal device. When resources are limited, multiple beams may be sent in a time-division manner, which may increase the positioning delay or reduce the accuracy and real-time performance of positioning. For example, in the above technical solution, the network device can allocate different frequency domain units to different beams, and precode different frequency domain units of the reference signals corresponding to different beams respectively. In this way, the network device can simultaneously send different beams to the terminal device based on different frequency domain units. Compared with sending different beams in time division, it can reduce the positioning delay and obtain real-time positioning results.

[0035] In certain implementations of the second aspect, the second information further includes an identifier of a frequency domain unit corresponding to any reference signal resource among the reference signal resources corresponding to the at least one reference signal.

[0036] In the above technical solution, the LMF can inform the terminal device to receive the corresponding beam on the corresponding frequency domain unit through the second information.

[0037] In certain implementations of the first aspect or the second aspect, the method further includes: the terminal device determines third information, the third information indicating that the terminal device is in a near-field communication range or a far-field communication range corresponding to the network device; and the terminal device sends the third information to the LMF.

[0038] In the above technical solution, the terminal device can inform the LMF whether it has entered the near-field communication range through the third information. For example, when the terminal device informs the LMF that it has entered the near field, the LMF can use the above-mentioned near-field positioning method to locate the target terminal device. This method can avoid the problem of inaccurate positioning results caused by the LMF's inability to perceive that the terminal device has entered the near-field communication range and the use of inappropriate positioning methods.

[0039] In certain implementations of the first aspect or the second aspect, the third information is carried in a positioning protocol message. For example, the positioning protocol message is an LPP message.

[0040] For example, the positioning protocol message is used to request assistance data for positioning measurement. For example, the positioning protocol message is a request for assistance data (Request Assistance Data).

[0041] For example, the positioning protocol message is used to provide positioning information of the terminal device. For example, the positioning protocol message is Provide Location Information.

[0042] In certain implementations of the first aspect or the second aspect, the third information is carried in a non-access stratum (NAS) message or a location service (LCS) message.

[0043] For example, a NAS message or an LCS message is used to initiate a positioning service request.

[0044] In certain implementations of the first or second aspects, the terminal device determining the third information includes: the terminal device determining the third information based on system broadcast information from a network device, the system broadcast information indicating that the terminal device receiving the system broadcast information is within a near-field communication range or a far-field communication range; or the terminal device determining the third information based on historically acquired terminal device location information; or the terminal device determining the third information based on channel information obtained by measuring a reference signal. For example, if the channel characteristics are closer to those in the near field, the terminal device considers that the terminal device has entered the near-field range.

[0045] The above technical solution provides several possible methods for a terminal device to determine whether it is located in a near-field communication range or a far-field communication range.

[0046] In a third aspect, a near-field positioning method is provided. The method can be performed by a positioning management function network element, or can also be performed by a component of the positioning management function network element (such as a chip or circuit), without limitation. For ease of description, the following description uses the positioning management function network element LMF as an example.

[0047] The method includes: a positioning management function LMF receives first information from a terminal device, wherein the first information indicates a reference signal resource corresponding to a beam with a maximum reference signal received power RSRP among at least one beam received by the terminal device from a network device; or, the first information indicates RSRPs corresponding to N beams or a ratio of RSRPs corresponding to N beams to RSRPs corresponding to a reference beam, wherein the reference beam is any one of the N beams; and the LMF determines the position of the terminal device based on the first information.

[0048] For the beneficial effects of the third aspect, please refer to the description of the second aspect and will not be repeated here.

[0049] In certain implementations of the third aspect, the first information indicates a reference signal resource corresponding to a beam with the largest RSRP among at least one beam received by the terminal device from a network device, and the LMF determines the position of the terminal device based on the first information, including: the LMF determines the position of the terminal device based on the corresponding distance and angle of the beam with the largest RSRP, wherein the distance corresponding to the beam with the largest RSRP is the distance between the center position of the beam with the largest RSRP and the reference antenna of the network device, and the angle corresponding to the beam with the largest RSRP is the angle of the center position of the beam with the largest RSRP relative to the reference antenna.

[0050] In certain implementations of the third aspect, the first information indicates the RSRP corresponding to N beams or the ratio of the RSRP corresponding to N beams to the RSRP corresponding to a reference beam, and the LMF determines the position of the terminal device based on the first information, including: the LMF determines the position of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam and the distance and angle corresponding to the N beams.

[0051] In certain implementations of the third aspect, the method also includes: the LMF sends a first request message to the terminal device, the first request message is used to request positioning measurement of the terminal device; the LMF receives first information from the terminal device, including: the LMF receives a first request response message from the terminal device, the first request response message includes the first information.

[0052] In certain implementations of the third aspect, the method also includes: the LMF sends second information to the terminal device, the second information including at least one of the following parameters: an identifier of at least one reference signal resource, and configuration information of a reference signal corresponding to at least one beam, wherein the at least one reference signal resource includes a reference signal resource corresponding to each beam in at least one beam.

[0053] In certain implementations of the third aspect, the second information further includes an identifier of a frequency domain unit corresponding to any reference signal resource among the at least one reference signal resource.

[0054] In certain implementations of the third aspect, the method further includes: the LMF sends a second request message to the network device, where the second request message is used to request second information; and the LMF receives a second request response message from the network device, where the second request response message includes the second information.

[0055] In certain implementations of the third aspect, the method further includes: LMF receiving third information, the third information indicating that the terminal device is in the near-field communication range or far-field communication range corresponding to the network device; LMF selecting an appropriate positioning method based on the third information to locate the terminal device.

[0056] In certain implementations of the third aspect, the LMF receives third information from the terminal device.

[0057] In certain implementations of the third aspect, the third information is carried in a positioning protocol message. For example, the positioning protocol message is an LPP message.

[0058] For example, the positioning protocol message is used to request assistance data for positioning measurement. For example, the positioning protocol message is a request for assistance data (Request Assistance Data).

[0059] For example, the positioning protocol message is used to provide positioning information of the terminal device. For example, the positioning protocol message is Provide Location Information.

[0060] In certain implementations of the third aspect, the third information is carried in a non-access stratum (NAS) message or a location service (LCS) message.

[0061] For example, a NAS message or an LCS message is used to initiate a positioning service request.

[0062] In certain implementations of the third aspect, the LMF receives third information from the network device.

[0063] In certain implementations of the third aspect, the method also includes: LMF sends a request message #3 to the network device, request message #3 requests the network device to report that the terminal device is in the near-field communication range or the far-field communication range; then LMF receives the third information from the network device, including: LMF receives a request response message #3 from the network device, request response message #3 includes the third information.

[0064] In a fourth aspect, a near-field positioning method is provided. This method can be performed by a network device, or by a component (e.g., a chip or circuit) within the network device, without limitation. For ease of description, the following description uses the method performed by a network device as an example.

[0065] The method includes: the network device receives a reference signal from the terminal device; the network device measures the reference signal to obtain a first distance and a first angle corresponding to a first position, wherein the first position is a position within the near-field communication range of the network device, the first distance is the distance between the first position and a reference antenna of the network device, and the first angle is the angle of the first position relative to the reference antenna; the network device sends the first distance and the first angle to a positioning management function LMF, wherein the first distance and the first angle are used to determine the position of the terminal device, and the position of the terminal device is the first position; or the network device sends the position information of the terminal device to the LMF, wherein the position of the terminal device is the first position determined based on the first distance and the first angle.

[0066] It can be understood that this method is suitable for uplink positioning within the near-field communication range, and in this method the network device can measure the reference signal from the terminal device to determine the first distance and the first angle. The network device can send the first distance and the first angle to the LMF, and the LMF calculates the location information of the terminal device. Alternatively, the network device can determine the location of the terminal device based on the first distance and the first angle, and then inform the LMF of the calculation result.

[0067] In certain implementations of the fourth aspect, the method further includes: the network device determines third information, the third information indicating that the terminal device is in a near-field communication range or a far-field communication range corresponding to the network device; and the network device sends the third information to the positioning management function LMF.

[0068] For example, the network device may determine whether the terminal device is located in the near field based on a reference signal (eg, SRS) sent by the terminal device, and thereby determine the third information.

[0069] In certain implementations of the fourth aspect, the method also includes: the network device receives a request message #3 from the LMF, the request message #3 requests the network device to report that the terminal device is in the near-field communication range or the far-field communication range; then the network device sends a third information to the LMF, including: the network device sends a request response message #3 to the LMF, the request response message #3 includes the third information.

[0070] In a fifth aspect, a near-field positioning method is provided. The method can be performed by a positioning management function network element, or can also be performed by a component (such as a chip or circuit) in the positioning management function network element, without limitation. For ease of description, the following description is based on an example of execution by a positioning management function network element LMF.

[0071] The method includes: a positioning management function LMF receives a first distance and a first angle corresponding to a first position from a network device, wherein the first position is a position within a near-field communication range of the network device, the first distance is the distance between the first position and a reference antenna of the network device, and the first angle is the angle of the first position relative to the reference antenna; the LMF determines the position of the terminal device based on the first distance and the first angle, and the position of the terminal device is the first position.

[0072] In the method, the LMF determines the location of the terminal device based on a first distance and a first angle received from a network device.

[0073] In certain implementations of the fifth aspect, the method also includes: LMF receives third information, the third information indicates that the terminal device is in the near-field communication range or far-field communication range corresponding to the network device; LMF selects an appropriate positioning method based on the third information to locate the terminal device.

[0074] In certain implementations of the fifth aspect, the LMF receives third information from the terminal device.

[0075] In certain implementations of the fifth aspect, the third information is carried in a positioning protocol message. For example, the positioning protocol message is an LPP message.

[0076] For example, the positioning protocol message is used to request assistance data for positioning measurement. For example, the positioning protocol message is a request for assistance data (Request Assistance Data).

[0077] For example, the positioning protocol message is used to provide positioning information of the terminal device. For example, the positioning protocol message is Provide Location Information.

[0078] In certain implementations of the fifth aspect, the third information is carried in a non-access stratum NAS message or a location service LCS message.

[0079] For example, a NAS message or an LCS message is used to initiate a positioning service request.

[0080] In certain implementations of the fifth aspect, the LMF receives third information from the network device.

[0081] In certain implementations of the fifth aspect, the method also includes: LMF sends a request message #3 to the network device, request message #3 requests the network device to report that the terminal device is in the near-field communication range or the far-field communication range; then LMF receives third information from the network device, including: LMF receives a request response message #3 from the network device, request response message #3 includes the third information.

[0082] In the sixth aspect, a communication device is provided, which is used to execute the method provided in any one of the first to fifth aspects. Specifically, the communication device may include a unit and / or module for executing the method provided in the first aspect or any one of the above-mentioned implementations of the first aspect, or, include a unit and / or module for executing the method provided in the second aspect or any one of the above-mentioned implementations of the second aspect, or, include a unit and / or module for executing the method provided in the third aspect or any one of the above-mentioned implementations of the third aspect, or, include a unit and / or module for executing the method provided in the fourth aspect or any one of the above-mentioned implementations of the fourth aspect, or, include a unit and / or module for executing the method provided in the fifth aspect or any one of the above-mentioned implementations of the fifth aspect.

[0083] In one implementation, the communication device is a device (e.g., a terminal device, an LMF, or a network device). When the communication device is a device, the transceiver unit may be a transceiver or an input / output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0084] In another implementation, the communication device is a chip, chip system, or circuit used in a device (e.g., a terminal device, an LMF, or a network device). When the communication device is a chip, chip system, or circuit used in a device, the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0085] In the seventh aspect, a communication device is provided, which includes: a memory for storing programs; at least one processor for executing computer programs or instructions stored in the memory to execute the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or to execute the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect, or to execute the method provided by the third aspect or any one of the above-mentioned implementations of the third aspect, or to execute the method provided by the fourth aspect or any one of the above-mentioned implementations of the fourth aspect, or to execute the method provided by the fifth aspect or any one of the above-mentioned implementations of the fifth aspect.

[0086] In one implementation, the communication device is a device (such as a terminal device, a LMF, or a network device).

[0087] In another implementation, the device is a chip, a chip system, or a circuit used in a device (such as a terminal device, a LMF, or a network device).

[0088] In an eighth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0089] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be understood as processor output, reception, input and other operations, and can also be understood as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0090] In the ninth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes instructions for executing the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or includes instructions for executing the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect, or includes instructions for executing the method provided by the third aspect or any one of the above-mentioned implementations of the third aspect, or includes instructions for executing the method provided by the fourth aspect or any one of the above-mentioned implementations of the fourth aspect, or includes instructions for executing the method provided by the fifth aspect or any one of the above-mentioned implementations of the fifth aspect.

[0091] In the tenth aspect, a computer program product comprising instructions is provided. When the computer program product is run on a computer, the computer is caused to execute the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or the computer is caused to execute the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect, or the computer is caused to execute the method provided by the third aspect or any one of the above-mentioned implementations of the third aspect, or the computer is caused to execute the method provided by the fourth aspect or any one of the above-mentioned implementations of the fourth aspect, or the computer is caused to execute the method provided by the fifth aspect or any one of the above-mentioned implementations of the fifth aspect.

[0092] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface. The processor reads instructions stored in the memory through the communication interface, executes the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or executes the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect, or executes the method provided by the third aspect or any one of the above-mentioned implementations of the third aspect, or executes the method provided by the fourth aspect or any one of the above-mentioned implementations of the fourth aspect, or executes the method provided by the fifth aspect or any one of the above-mentioned implementations of the fifth aspect.

[0093] Optionally, as an implementation, the chip also includes a memory, in which a computer program or instruction is stored, and the processor is used to execute the computer program or instruction stored on the memory. When the computer program or instruction is executed, the processor is used to execute the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or execute the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect, or execute the method provided by the third aspect or any one of the above-mentioned implementations of the third aspect, or execute the method provided by the fourth aspect or any one of the above-mentioned implementations of the fourth aspect, or execute the method provided by the fifth aspect or any one of the above-mentioned implementations of the fifth aspect.

[0094] In the twelfth aspect, a communication system is provided, comprising at least one of the terminal device, LMF and network device mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] FIG1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application.

[0096] FIG2 is a schematic diagram of a wireless communication system 200 applicable to an embodiment of the present application.

[0097] FIG3 is a schematic diagram of the basic process of downlink positioning.

[0098] FIG4 is a schematic diagram of a near-field communication range and a far-field communication range.

[0099] FIG5 is a schematic flowchart of a near-field positioning method 500 provided in the present application.

[0100] FIG6 is a schematic diagram of the distance and angle corresponding to a beam within the near field communication range.

[0101] FIG. 7 is a schematic diagram of multiple beams transmitted by a network device within a near field communication range.

[0102] FIG8 is a schematic flowchart of a near-field positioning method 800 provided in the present application.

[0103] FIG9 is a schematic diagram of frequency-division transmission of multiple beams on multiple subcarriers within a near-field communication range.

[0104] FIG10 is a schematic flowchart of a near-field positioning method 1000 provided in the present application.

[0105] FIG11 is a schematic block diagram of a communication device 1100 provided in an embodiment of the present application.

[0106] FIG12 is a schematic block diagram of a communication device 1200 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0107] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0108] Before introducing the embodiments of the present application, the following points are first explained.

[0109] First, in this application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their internal logical relationships.

[0110] It can be understood that some optional features in the embodiments of the present application may not depend on other features in certain scenarios, and may also be combined with other features in certain scenarios, without limitation.

[0111] It can be understood that the solutions in the embodiments of this application can be used in combination, and the explanations or descriptions of each term, similar operations or steps appearing in the embodiments can be referenced or explained with each other in each embodiment, and this application does not limit this.

[0112] Second, in this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple, respectively.

[0113] Third, throughout this application, the terms "first," "second," and various numerical references are used for descriptive purposes only and are not intended to limit the scope of the embodiments of this application. For example, they are used to distinguish between different messages, rather than to describe a specific order or precedence. It should be understood that these references are interchangeable, where appropriate, to allow for the description of scenarios beyond the embodiments of this application.

[0114] Fourth, in this application, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0115] Fifth, in this application, "indication" can include direct indications and indirect indications. When describing that a certain indication information indicates A, it can include that the indication information directly indicates A or indirectly indicates A, but it does not mean that the indication information must contain A.

[0116] Sixth, in this application, "sending information to XX (device)" can be understood as the destination of the information being the device. This can include sending information to the device directly or indirectly. "Receiving information from XX (device) or receiving information from XX (device)" can be understood as the source of the information being the device, which can include receiving information from the device directly or indirectly. The information may undergo necessary processing between the source and destination, such as format changes, but the destination can still understand the valid information from the source.

[0117] Seventh, the arrows or boxes shown by dotted lines in the schematic diagrams of the accompanying drawings in the specification of this application represent optional steps or optional modules.

[0118] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or new radio (NR) and future communication systems, vehicle-to-other devices (V2X), where V2X may include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc., long term evolution-vehicle (LTE-V), Internet of Vehicles, machine type communication (MTC), Internet of Things (IoT), etc. things, IoT), long term evolution-machine (LTE-M), machine to machine (M2M), etc.

[0119] The terminal device in the embodiments of the present application may refer to user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, an audio device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited thereto.

[0120] The terminal device in this application can also be a road side unit (RSU). RSU is a facility deployed on the roadside for auxiliary communication in the vehicle-mounted delay-tolerant network. It is directly connected to the backbone network and can communicate wirelessly with the vehicle. Compared with the vehicles in the vehicle-mounted delay-tolerant network, RSU has better communication capabilities, coverage and transmission speed, and can communicate with multiple vehicles at the same time. In addition, RSU has a large storage space that can store information and increase the probability of communication. Therefore, by deploying relevant RSU in the road traffic system, on the one hand, it can effectively solve the existing vehicle-mounted Internet access problem, and on the other hand, it can greatly increase the communication opportunities between vehicles. By caching messages through RSU, efficient transmission of messages between vehicles can be achieved.

[0121] Exemplarily, the terminal device may include: a radio resource control (RRC) signaling interaction module, a media access control (MAC) signaling interaction module, and a physical (PHY) signaling interaction module. Among them, the RRC signaling interaction module may be: a module used by the network device and the terminal device to send and receive RRC signaling. The MAC signaling interaction module may be: a module used by the network device and the terminal device to send and receive MAC control element (CE) (MAC-CE) signaling. PHY signaling and data may be: a module used by the network device and the terminal device to send and receive uplink control signaling or downlink control signaling, uplink and downlink data, or downlink data.

[0122] The network device in the embodiment of the present application can be a device for communicating with a terminal device, and the network device includes but is not limited to: an evolved nodeB (eNB or eNodeB) in an LTE system, a wireless controller in a cloud radio access network (CRAN) scenario, a radio network controller (RNC), a base station controller (BSC), a home base station (for example, home evolved nodeB, or home nodeB, HNB), a baseband unit (BBU), or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, or a network device in a future evolved PLMN network, etc., and can be an access point (AP) in a wireless local area network (WLAN), a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc., and can be a new wireless system (new The gNB or transmission point (TRP or TP) in the radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or transmission point, is not limited in the embodiments of the present application.

[0123] In some deployments, the gNB may include a centralized unit (CU) and a distributed unit (DU). The gNB may also include an active antenna unit (AAU). The CU implements some gNB functions, while the DU implements some gNB functions. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. The AAU implements some physical layer processing functions, RF processing, and active antenna-related functions. Because RRC layer information ultimately becomes PHY layer information, or is converted from PHY layer information, in this architecture, higher-layer signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or by a combination of the DU and the AAU. It is understood that the network device may include one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be classified as a network device in an access network (RAN) or a network device in a core network (CN), which is not limited in this application.

[0124] The network device in the embodiment of the present application may also be an open radio access network (O-RAN) device (open RAN, or ORAN), that is, the network device includes multiple RAN nodes, and the multiple RAN nodes collaborate to assist the terminal device to achieve wireless access, and different RAN nodes respectively implement part of the functions of the network device. As an example, the RAN node can be a CU, DU, CU-control plane (CP), CU-user plane (UP), or radio unit (RU), etc. Among them, the CU and DU can be set separately, or can also be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or radio frequency unit, for example, a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). For example, in some deployments, the network device may include a centralized unit (CU) and a DU. In different systems, CU (or CU-CP and CU-UP), DU, or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be referred to as O-CU (Open CU), DU may also be referred to as O-DU (Open DU), CU-CP may also be referred to as O-CU-CP (Open CU-CP), CU-UP may also be referred to as O-CU-UP (Open CU-UP), and RU may also be referred to as O-RU (Open RU). For convenience of description, this application uses CU, CU-CP, CU-UP, DU and / or RU as examples for description. Any unit in the CU (or CU-CP, CU-UP), DU and / or RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0125] Optionally, for network elements in the ORAN system, each network element may implement the protocol layer functions shown in Table 1 below.

[0126] Table 1

[0127] It should be noted that, in the ORAN system, the network device in this application may be one or more network elements in Table 1 above.

[0128] The following describes the architecture of the CU and DU of an access network device. The access network device includes at least one CU and at least one DU. Optionally, the access network device also includes at least one RU.

[0129] The following is an introduction using the example of an access network device including a CU and a DU. The CU has some functions of the core network, and the CU may include a CU-CP and a CU-UP. The CU and the DU may be configured according to the protocol layer functions of the wireless network they implement. For example, the CU is configured to implement the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above it (for example, the RRC layer and / or the SDAP layer). The DU is configured to implement the functions of the protocol layers below the PDCP layer (for example, the RLC layer, the MAC layer, and / or the physical (PHY) layer). For another example, the CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and the DU is configured to implement the functions of the PDCP layer and the protocol layers below it (for example, the RLC layer, the MAC layer, and / or the PHY layer, etc.).

[0130] When a CU includes a CU-CP and a CU-UP, the CU-CP is used to implement the control plane functions of the CU, and the CU-UP is used to implement the user plane functions of the CU. For example, when the CU is configured to implement the functions of the PDCP layer, RRC layer, and SDAP layer, the CU-CP is used to implement the RRC layer functions and the control plane functions of the PDCP layer, and the CU-UP is used to implement the SDAP layer functions and the user plane functions of the PDCP layer.

[0131] The CU-CP can interact with network elements in the core network that implement control plane functions. The network elements in the core network that implement control plane functions can be access and mobility function network elements, such as the access and mobility management function (AMF) in the 5G system. The access and mobility function network element is responsible for mobility management in the mobile network, such as location update of terminal devices, registration network of terminal devices, and switching of terminal devices.

[0132] The CU-UP can interact with network elements in the core network that implement user plane functions. Network elements in the core network that implement user plane functions, such as the User Plane Function (UPF) in the 5G system, are responsible for forwarding and receiving data in terminal devices.

[0133] The above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, the CU or DU can be configured to have the functions of more protocol layers, or the CU or DU can be configured to have partial processing functions of the protocol layer. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of the CU or DU can be divided according to the service type or other system requirements. For example, according to the delay, the functions whose processing time needs to meet the smaller delay requirement are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.

[0134] The DU and RU can work together to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the mid-RF function. For another example, the DU is configured to implement the high-layer functions in the PHY layer, and the RU is configured to implement the low-layer functions in the PHY layer or to implement the low-layer functions and the RF functions. The high-layer functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer, and the low-layer functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.

[0135] It should be noted that the network device can be a device or apparatus with a chip, or a device or apparatus with an integrated circuit, or a chip, chip system, module or control unit in the aforementioned device or apparatus, and this application does not limit this. It should be noted that in this application, when referring to a network device, it can refer to the network device itself, or it can refer to a chip, functional module or integrated circuit in the network device that performs the method provided in this application, and this application does not limit this.

[0136] To facilitate understanding of the embodiments of the present application, a communication system to which the embodiments of the present application may be applied is first described.

[0137] FIG1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. The communication system 100 includes a terminal device (represented as a UE in FIG1 ), a radio access network (represented as a next generation radio access network (NG-RAN) in FIG1 ), and a core network.

[0138] The radio access network includes one or more next-generation evolved node Bs (ng-eNBs) and gNBs. An ng-eNB represents an LTE base station connected to the 5G core network, and a gNB represents a 5G base station connected to the 5G core network. Communication between ng-eNBs, between two ng-eNBs, or between two gNBs occurs over the Xn interface. The Xn interface is also called the XnAP interface. The radio access network connects to the core network via the NG-C interface.

[0139] The core network includes other functions such as access and mobility management function (AMF) and location management function (LMF).

[0140] LMF is responsible for supporting different types of location services related to UE, including positioning of UE and transmission of auxiliary data to UE. LMF may exchange signals with RAN, such as ng-eNB or gNB, and UE. For example, LMF and ng-eNB or gNB exchange information through new radio positioning protocol annex (NRPPa) messages, such as obtaining configuration information of positioning reference signal (PRS), sounding reference signal (SRS), cell timing, cell location information, etc. For another example, LMF and UE transmit UE capability information, auxiliary information, measurement information, etc. through LTE positioning protocol (LPP) messages.

[0141] The AMF entity can receive location service requests related to the UE from the location services (LCS) entity of the 5G core network (5G core, 5GC), or the AMF itself can start some location services on behalf of a specific UE and forward the location service request to the LMF.

[0142] The terminal device connects to the radio access network via the ng-eNB via the LTE-Uu interface. The terminal device can also connect to the radio access network via the gNB via the NR-Uu interface.

[0143] It should also be understood that the communication system 100 may include one or more terminal devices, for example, one or more terminal device groups (such as the UE set shown in FIG1 ). A gNB may send data or control signaling to one or more terminal devices. Multiple gNBs may also simultaneously send data or control signaling to a single terminal device.

[0144] Optionally, the ng-eNB and gNB in ​​Figure 1 can also be replaced by TRP, TP, reception point (RP), cell, etc.

[0145] Figure 2 is a schematic diagram of a wireless communication system 200 applicable to an embodiment of the present application. As shown in Figure 2, the wireless communication system 200 may include at least one terminal device, such as UE101 shown in Figure 2. The wireless communication system 200 may also include multiple network devices (for example, the network device may be a base station (BS) or TRP, and the base station is taken as an example below), wherein the multiple base stations include the base station of the service cell of the terminal device 101 and the base stations of one or more neighboring cells of the service cell. The base station of the service cell (also referred to as the service base station) is shown as 102 in Figure 2, and the base stations of the neighboring cells (also referred to as neighboring base stations) may include base stations 103 and base stations 104 (not shown in the figure). Both the network device and the terminal device may be configured with multiple antennas, and the network device and the terminal device may communicate using multi-antenna technology.

[0146] Optionally, the base station in Figure 2 can be replaced by TRP, TP, RP, cell, etc.

[0147] In addition to network devices and terminal devices, the wireless communication system 200 may also include an LMF network element 105. The LMF network element 105 can be used to implement location estimation of terminal devices. The LMF network element 105 can be deployed inside the core network, that is, the LMF network element 105 is also a core network element. The LMF network element 105 can communicate with network devices through an AMF network element (not shown in the figure). For ease of description, in the embodiment of the present application, the LMF network element sending information to the network device through the AMF network element is referred to as the LMF network element sending information to the network device. In other words, the LMF network element sending a message to the network device in the embodiment of the present application can be understood as the LMF network element first sending the information to the AMF network element, and the AMF network element forwarding 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 the information to the network device.

[0148] In some embodiments, some functions of LMF network element 105, such as the location management component (LMC), can be integrated into the network device. For example, base station 102 of the serving cell and base stations 103 and 104 of two neighboring cells all have integrated LMCs. The LMC of the LMF network element integrated into the network device sending information to the network device can also be considered as the LMF network element sending information to the network device.

[0149] It should be noted that the communication system architecture shown in FIG2 is merely an example and is not limited to other architectures. For example, FIG2 shows base station 102 of a serving cell and base stations 103 and 104 of two neighboring cells. Obviously, communication system 200 may also include base stations of more neighboring cells.

[0150] In communication systems 100 and 200, LMF network elements communicate with base stations using the NRPPa protocol. LMF network elements communicate with UEs using the LPP protocol. LMFs exchange cell information with base stations using the NRPPa protocol, such as cell reference signal configuration information, cell timing information, and cell geographic location information. LMFs also communicate with UEs using the LPP protocol, including UE capability information, auxiliary information, and measurement information.

[0151] It should be noted that the names of the various network elements and interfaces in Figures 1 and 2 are merely examples. This application does not exclude the possibility that the network elements may be named differently in the future, or that the functions of the network elements may be merged. As technology evolves, any device or network element that can implement the functions of the aforementioned network elements falls within the scope of protection of this application. Furthermore, the aforementioned network elements may also be referred to as entities, devices, apparatuses, functions, or modules, etc., and this application does not specifically limit these terms.

[0152] It should also be noted that the network architecture used in the embodiments of the present application is merely an example of a network architecture described from the perspective of a traditional point-to-point architecture and a service-oriented architecture. The network architecture applicable to the embodiments of the present application is not limited thereto. Any network architecture that can implement the functions of each of the above-mentioned network elements is applicable to the embodiments of the present application. The following explains some of the terms or concepts used in the embodiments of the present application to facilitate understanding by those skilled in the art.

[0153] 1. Beam: The electromagnetic wave radiation pattern of a group of antenna systems.

[0154] 2. Beamforming: A technique for establishing antenna radiation patterns. Specifically, beamforming is the process of adjusting the amplitude or phase of the signal on the RF link to form a directional electromagnetic wave radiation direction.

[0155] 3. Reference Signal Received Power (RSRP): RSRP measures the power of the reference signal received by the UE. The reference signal here is sent by the base station and measured by the UE. The unit of RSRP is dBm.

[0156] 4. TRP: A group of geographically co-located antennas (e.g., an antenna array with one or more antenna elements) that supports TP and / or RP functionality.

[0157] Positioning is an important function in mobile communication systems, requiring the system to provide users' location information in real time. Currently, the target UE (target UE) can be located through positioning technology, so that the positioning initiator that initiates the positioning service can obtain the location information of the target UE. The positioning initiator can be LCS, UE, or AMF network element. For example: LCS requests the target UE's service AMF to locate the target UE; or, the target UE's service AMF decides to locate the target UE; or, the target UE requests the positioning service from its service AMF, such as due to positioning or transmission of auxiliary information. When the positioning service is triggered, the LMF will further perform positioning-related operations. LMF needs to interact with the base station, such as obtaining auxiliary information related to air interface positioning; LMF also needs to interact with the target UE, such as the capability transmission process, including obtaining the UE's positioning capability, providing the UE with positioning-related auxiliary information, etc.

[0158] In existing positioning, positioning can be performed by transmitting and / or receiving positioning-related reference signals by the target UE, and positioning methods supported in NR and LTE can be used to achieve positioning of the target UE. For example, the positioning-related reference signals include PRS and / or SRS, where PRS is a downlink signal and SRS is an uplink signal.

[0159] Currently, positioning methods include uplink positioning methods and downlink positioning methods. Among them, the uplink positioning method sends a reference signal related to positioning (such as SRS) in the uplink, and the base station performs position calculation. Typical positioning methods include uplink time difference of arrival (UL-TDOA) and uplink angle of arrival (UL-AOA). These two positioning methods determine the UE's position by measuring the time difference (TDOA) or angle of arrival (AOA) between the positioning-related signals sent by the UE and the arrival of multiple cell base stations. Correspondingly, the downlink positioning method sends a reference signal related to positioning (such as PRS) in the downlink, and the terminal performs position calculation. Typical positioning methods include downlink time difference of arrival (DL-TDOA). The following describes the basic process of downlink positioning in detail using downlink positioning as an example.

[0160] Figure 3 is a schematic diagram of the basic process of downlink positioning. As shown in Figure 3, the downlink positioning process includes:

[0161] 301. The LMF obtains UE capabilities through the LPP capability transfer process.

[0162] The UE capability may include the UE's ability to process downlink (DL) reference signals (RS). For ease of description, the process is described using the PRS as an example.

[0163] 302. The LMF sends a TRP information request to multiple NG-RAN nodes. Correspondingly, the NG-RAN nodes receive the TRP information request.

[0164] The TRP information request may be used to request TRP information of a TRP. Exemplarily, the TRP information may include at least one of the following: cell information, coordinates, TRP ID of the NG-RAN TRP, PRS configuration, etc. Among them, the PRS configuration may include the time domain resource configuration of the PRS, the frequency domain resource configuration of the PRS, etc. Exemplarily, the time domain resource configuration of the PRS includes the period of the PRS, the slot offset, etc., which are not listed here one by one. The frequency domain resource configuration of the PRS may include the frequency point, comb size, etc., which are not listed here one by one.

[0165] 303. The NG-RAN node sends a TRP information response to the LMF. Correspondingly, the LMF receives the TRP information response.

[0166] It is understood that the TRP information response is used to respond to the TRP information request. The TRP information response may carry the information requested by the LMF.

[0167] 304. The LMF provides the UE with the assistance data required for measurement and / or calculation through the assistance data transfer process. The assistance data may include cell information of multiple TRPs, PRS configuration, etc.

[0168] 305. The LMF sends a request location information to the UE, and the UE receives the request location information.

[0169] The requested location information can be used to request the UE to measure the PRS to obtain corresponding measurement values ​​or position estimation results. For example, in DL-TDOA positioning technology, the LMF can request the UE to measure the downlink reference signal arrival time difference (DL RSTD) by requesting the location information.

[0170] 306. The UE measures the PRS and obtains the measurement result.

[0171] 307. The UE sends a provide location information to the LMF, reporting the measurement value or location estimation result to the LMF. Correspondingly, the LMF receives the provide location information.

[0172] Optionally, the UE supports different modes for positioning. For example, the LMF calculates the location information of the target UE, which can be called an LMF-based mode or a UE-assisted mode. For another example, the target UE calculates its own location information, which can be called a UE-based mode.

[0173] For example, for the DL-TDOA positioning method, if it is LMF-based, the target UE needs to report to the LMF the DL RSTD obtained by the target UE from measuring PRSs of multiple base stations, and the LMF calculates the location information of the target UE based on the DL RSTD reported by the UE.

[0174] For example, if it is UE-based, the target UE can calculate its own location information based on the DL RSTD obtained by measuring PRS from multiple base stations and the auxiliary information provided by the network side, and provide the UE's location information to the LMF through a location information message.

[0175] The following describes the near-field communication involved in this application. When an antenna radiates a wireless signal in free space, the electromagnetic diffraction domain of the wireless signal can be divided into an inductive near-field region, a radiating near-field region, and a far-field region based on the radiation characteristics of the wireless signal in free space. Figure 4 shows a schematic diagram of each region, with the communication radii corresponding to the inductive near-field region and the radiating near-field region being d1 and d2, respectively.

[0176] Optionally, the near-field communication range described in this application may be a radiated near-field area. For example, the near-field communication range can generally be determined using formula (1), but this is also related to the specific channel model, etc. This application does not limit the formula used to calculate the communication radius of the radiated near-field area.

[0177] Where D is the maximum geometric dimension of the antenna, and λ is the wavelength of the electromagnetic wave.

[0178] Optionally, the near field communication range described in this application may be a specified or configured range. For example, an area with a communication radius of d3 may be defined as the near field communication range. d3 may be defined by a protocol or configured by the network side, and is not limited in this application.

[0179] As antenna panels grow larger and communication frequency bands become higher, the near-field communication range of base stations may be further expanded. For example, the communication radius can reach tens or even hundreds of meters, making near-field communication possible in the future. Positioning methods in far-field communication are generally based on the plane wave assumption, and the isophase surface of a plane wave is a plane. However, the plane wave assumption does not hold true in the near field. Near-field communication must be modeled based on a spherical wave model, and the isophase surface during electromagnetic wave propagation is a sphere. Because existing positioning technologies are based on the plane wave assumption in far-field communication, they are no longer applicable when the UE is in the near-field range. Therefore, how to achieve UE positioning within the near-field communication range has become an urgent problem to be solved.

[0180] In view of this, the present application proposes a near-field positioning method that can effectively solve the above technical problems. The positioning method in near-field communication proposed in the present application is described in detail below.

[0181] Figure 5 is a schematic flow chart of a near-field positioning method 500 provided by the present application. The method is applicable to downlink positioning, and the method is for the target terminal device to calculate its own location information (ie, UE-based), and the method includes the following steps.

[0182] S510, the terminal device measures N reference signals corresponding to N beams from the network device to obtain RSRPs corresponding to the N beams, where N is a positive integer.

[0183] It is understood that this method is applied in near-field communication, and therefore the N beams are all beams formed by spherical waves. In this application, a beam formed by a spherical wave indicates that the electromagnetic wave signal is based on the spherical wave assumption. For example, the beam in near-field communication can also be referred to as a spherical wave beam, a near-field beam, etc., and this application does not limit the specific name.

[0184] It can also be understood that the N reference signals are N reference signals sent by the network device on N reference signal resources respectively, each reference signal corresponds to a beam, and the terminal device measures the N reference signals to obtain N RSRPs.

[0185] It can also be understood that the N RSRPs obtained above correspond one-to-one to the N reference signals measured, and the N reference signals correspond one-to-one to the N beams. Therefore, the N beams correspond one-to-one to the N RSRPs. For example, the network device sends reference signal #1 through reference signal resource #1, reference signal #1 corresponds to beam #1, and the terminal device measures reference signal #1 to obtain RSRP #1. In this embodiment of the application, RSRP #1 can also be referred to as the RSRP corresponding to beam #1, or the RSRP corresponding to reference signal resource #1, or the RSRP corresponding to reference signal #1.

[0186] Optionally, the reference signal may be a PRS, or other reference signals that may be used for positioning, which is not limited in this application.

[0187] Optionally, before S510, the method further includes: S530, the network device sends a reference signal to the terminal device through at least one beam, and correspondingly, the terminal device receives the reference signal corresponding to at least one beam from the network device. Similarly, this method is applied in near-field communication, so the at least one beam is a beam formed by a spherical wave. Then, in S510, the terminal device measures the reference signals corresponding to N beams from the network device to obtain the RSRP corresponding to the N beams, including: the terminal device measures the reference signal corresponding to at least one beam to obtain the RSRP corresponding to the at least one beam, and the at least one beam includes the N beams.

[0188] S520, the terminal device determines the position of the terminal device based on the RSRP corresponding to the N beams and the distances and angles corresponding to the N beams, wherein the distance corresponding to the first beam is the distance between the center position of the first beam and the reference antenna of the network device, the angle corresponding to the first beam is the angle of the center position of the first beam relative to the reference antenna, and the first beam is any one of the N beams.

[0189] For example, the center position of the first beam is also referred to as the energy convergence center of the first beam, that is, the highest energy point of the first beam.

[0190] It is understood that the distance corresponding to the first beam may be the distance between the center position of the first beam and a position corresponding to the reference antenna. For example, the position corresponding to the reference antenna may be a position corresponding to a point on the reference antenna, or may be a virtual position corresponding to the reference antenna, which is not limited in this application.

[0191] Exemplarily, if the network device is an O-RAN device, S530 may be implemented by the DU and / or the RU.

[0192] The following specifically describes the distance and angle corresponding to the first beam in conjunction with Figure 6. For example, as shown in Figure 6, the antenna panel of the network device includes (2M+1) antennas, where M is a natural number, and the (2M+1) antennas are numbered in sequence as antenna (-M), antenna (-M+1), ... antenna 0, ... antenna (M-1), antenna M. Taking antenna 0 as the reference antenna, the center position of the first beam is shown in the figure, and r0 is the straight-line distance between the center position of the first beam and antenna 0. is the angle of the center position of the first beam relative to the reference antenna. For example, in FIG6 , It is the angle between the direction of the line connecting antenna 0 and the center of the first beam and the direction perpendicular to antenna 0. For example, the direction perpendicular to antenna 0 is 0 degrees, the left is positive, the right is negative, and vice versa.

[0193] It can be understood that during beamforming, the beamforming vector corresponding to the first beam is as shown in formula (2):

[0194] Where, k = 2π / λ, λ is the wavelength of electromagnetic wave. m represents the straight-line distance between the center of the first beam and antenna m, r m (-M≤m≤M, m is a natural number) can be obtained by the following formula (3):

[0195] Among them, d mis the distance between antenna m and antenna 0. For example, as shown in FIG6 , the distance d between antenna (-M) and antenna 0 is (-M) , the straight-line distance between the center of the first beam and the antenna (-M) is r (-M) .

[0196] It can be understood that the beamforming vector of the first beam in the near field can be obtained by the corresponding Indicates that the distance and angle corresponding to the first beam described in this application can be the same as the beamforming of the first beam Corresponding. For example, the at least one beam can come from the same network device or from different network devices. However, it should be noted that if the at least one beam comes from the same network device (for example, network device #1), the distance and angle corresponding to any beam in the at least one beam are the distance and angle relative to the same reference antenna of network device #1. If the at least one beam comes from different network devices, for example, at least one beam includes 8 beams, of which beam #1 to beam #4 come from network device #1, and beam #5 to beam #8 come from network device #2, then the distance and angle corresponding to any beam in beam #1 to beam #4 are the distance and angle relative to the same reference antenna of network device #1, and the distance and angle corresponding to any beam in beam #5 to beam #8 are the distance and angle relative to the same reference antenna of network device #2. For the convenience of description, the following text will take the received beams coming from the same network device as an example for explanation.

[0197] It can be understood that the N beams ultimately used to determine the location of the terminal device are N beams selected from the at least one beam based on different near-field positioning implementations. Two possible near-field positioning implementations are given below.

[0198] Implementation method 1: The terminal device determines the position of the terminal device according to the distance and angle corresponding to the beam with the largest RSRP in the at least one beam (ie, N=1).

[0199] It can be understood that the position determined based on the distance and angle corresponding to the beam with the maximum RSRP in this method is the center position of the beam with the maximum RSRP, that is, the center position of the beam with the maximum RSRP in this method is used as the position of the terminal device. The following example illustrates this.

[0200] For example, if there are three beams in the area where the terminal device is located, the three beams are beam 1, beam 2, and beam 3, and the three beams correspond to reference signal 1, reference signal 2, and reference signal 3, respectively. The terminal device measures the reference signals corresponding to the three beams to obtain three RSRPs, which are RSRP1 corresponding to beam 1, RSRP2 corresponding to beam 2, and RSRP3 corresponding to beam 3. The terminal device determines that RSRP1 is the maximum RSRP value, then the terminal device determines the position of the terminal device according to the distance and angle corresponding to beam 1. Based on implementation method one, the terminal device considers the center position of beam 1 as the position estimation result.

[0201] Optionally, in this implementation method 1, the terminal device may also select any one of the at least one beams whose RSRP is greater than an RSRP threshold, and estimate the terminal device's position based on the distance and angle of the selected beam. It can be understood that the center position of the selected beam is the estimated terminal device position. For example, the threshold can be determined by the terminal device itself, specified by the protocol, or configured on the network side.

[0202] This positioning method can achieve downlink single-station positioning in the near field, and the measurement calculation is relatively simple. It is suitable for positioning services with low positioning accuracy requirements within the near field. For positioning services with higher positioning accuracy requirements, this application proposes another positioning method that can improve positioning accuracy. For details, see Implementation Method 2.

[0203] Implementation method 2: The terminal device measures N reference signals corresponding to N beams (N is greater than 1) to obtain N RSRPs corresponding to the N beams. The terminal device determines the position of the terminal device based on the relative values ​​of the N RSRPs and the distances and angles corresponding to the N beams.

[0204] The relative value of the N RSRPs represents a ratio of the N RSRPs to a reference RSRP, where the reference RSRP is the value of one of the N RSRPs. Exemplarily, the reference signal resource corresponding to the reference RSRP is referred to as a reference resource, or the beam corresponding to the reference RSRP is referred to as a reference beam, or the reference signal corresponding to the reference RSRP is referred to as a reference signal.

[0205] Optionally, the N beams are beams whose RSRPs corresponding to the at least one beam are located in the first N digits. For example, as shown in FIG7 , taking the case where a network device sends a reference signal PRS as an example, the network device sends PRS#0, PRS#1, PRS#2, PRS#3 and PRS#4 respectively through PRS resource #0, PRS resource #1, PRS resource #2, PRS resource #3 and PRS resource #4 in the near field. Each PRS corresponds to a beam (a beam is an ellipse in the figure), and PRS#0 to PRS#4 correspond to beams#0 to beam#4 respectively. The terminal device can measure the RSRPs corresponding to PRS#0 to PRS#4. If N=3, the terminal device selects beams#0 to beam#4 corresponding to the beams whose RSRPs are located in the first 3 digits to estimate the position of the terminal device. Assuming that the top three RSRPs for beams #0 to #4 are beam #2, beam #1, and beam #3, the terminal device can determine its location based on the relative strengths of the RSRPs for beams #2, #1, and #3, as well as the distance and angle information for beams #2, #1, and #3. For example, the reference RSRP can be the RSRP for the beam with the largest RSRP value, i.e., the reference RSRP can be the RSRP for beam #2.

[0206] Optionally, the N beams are any N beams in the at least one beam whose RSRP is greater than an RSRP threshold. The threshold may be determined by the terminal device, specified by a protocol, or configured by the network. This application does not limit how the N beams are selected.

[0207] Based on this second implementation, a possible specific positioning method is described below. For ease of description, this method is described as follows: a terminal device receives a reference signal (PRS) from the same network device and selects the N largest RSRPs from at least one received beam. This positioning method is described in detail below.

[0208] The N RSRPs used by the terminal device to calculate the terminal device's position are p0, p1, p2, ..., p N-1 , p0,p1,p2,…,p N-1 The N beams are obtained by measuring PRS#1, PRS#2, ..., PRS#(N-1), and the corresponding N beams are beam#0, beam#1, beam#2, ..., beam#(N-1). Then the terminal device can estimate the terminal device's position using formula (4):

[0209] In formula (4), Mark the distance and angle of any position relative to the reference antenna. It can be understood that the purpose of the above formula is to solve the target position corresponding to a terminal device. The distance and angle corresponding to the target position are The expression in formula (4) can be made Get the maximum value.

[0210] In formula (4), Indicates the ratio of RSRP corresponding to different beams measured by the terminal device at the current location, where p0 is the reference RSRP.

[0211] In formula (4), a i (0≤i≤N-1) is the beamforming vector corresponding to beam #i in beam #0 to beam #(N-1). Taking Figure 6 as an example, the reference antenna is 0. Assume that the distance and angle of the center position of beam #i (0≤i≤N-1) in beam #0 to beam #(N-1) relative to the reference antenna 0 are respectively Then the beamforming vector a of beam #i is i As shown in formula (5):

[0212] Wherein, k = 2π / λ, λ is the wavelength of electromagnetic wave, and T represents transposition. i,-M 、r i,-M+1 ,…,r i,0 …、r i,M-1 、r i,M represents the straight-line distances between the center position of beam i and antenna (-M), antenna (-M+1), ... antenna 0, ... antenna (M-1), and antenna M. As shown in Figure 6, according to the cosine theorem, r i,m (-M≤m≤M, m is a natural number) can be obtained by the following formula (6):

[0213] Among them, d m is the distance between antenna m and antenna 0.

[0214] In formula (4), it is assumed that the distance and angle of the current terminal device relative to the reference antenna are β can be defined as shown in formula (7):

[0215] Among them, β H For example, a0, β H a0 represents the field strength value or antenna gain of PRS#0 at that location, or the theoretical RSRP value obtained by the terminal device when measuring PRS#0 at that location. H represents the conjugate transpose. The meanings of other parameters are similar and will not be repeated here. Elements in It indicates the field strength ratio or antenna gain ratio of PRS#i and PRS#k at the location, or the theoretical RSRP ratio of PRS#i and PRS#k measured by the terminal device at the location.

[0216] It can be understood that the terminal device can traverse (or search) multiple locations based on formula (2) to obtain This application does not specifically limit which positions within the near field communication range are traversed and how to determine the traversed positions. For example, the terminal device can traverse all the grid points given in Figure 7. The position of the triangle surrounded by the dotted circle in the figure is the final estimated position of the terminal device. The distance and angle of the triangle relative to the reference antenna are

[0217] The above describes two possible positioning implementation methods in detail. The following describes other processes involved in the method.

[0218] Optionally, before the terminal device performs positioning measurement, the method further includes: the LMF sending a first request message to the terminal device, the first request message being used to request the terminal device to perform positioning measurement, and the terminal device correspondingly receiving the first request message from the LMF. Thereafter, in S520, the terminal device determines the location of the terminal device based on the above-described positioning implementation method, and then the terminal device sends a first request response message to the LMF, the first request response message including the location information of the terminal device, and correspondingly, the LMF receives the first request response message from the network device.

[0219] For example, the first request message may be the request location information (request location information) in 305 of FIG. 3 , and the first request response message may be the provide location information (provide location information) in S307 of FIG. 3 .

[0220] As previously mentioned, when the positioning service is triggered, the LMF needs to perform further positioning-related operations before the terminal device measures the reference signal. For example, the LMF needs to interact with network equipment, such as obtaining auxiliary information related to air interface positioning. The LMF also needs to interact with the target terminal device, such as the capability transmission process, including obtaining the terminal device's positioning capabilities and providing the terminal device with positioning-related auxiliary information. The positioning-related operations further performed by the LMF in near-field positioning will be described in method 800 below and will not be described in detail here.

[0221] Figure 8 is a schematic flow chart of a near-field positioning method 800 provided in this application. This method is applicable to downlink positioning, and the method calculates the location information of the target terminal device by LMF (i.e., LMF-based). The difference between method 800 and method 500 is that in method 800, the target terminal device only needs to measure the reference signal to obtain a measurement value, and send the measurement value to the network device, which determines the location information of the target terminal device based on the measurement value. The method includes the following steps.

[0222] S810: The terminal device measures at least one reference signal corresponding to at least one beam from the network device to obtain an RSRP corresponding to the at least one beam.

[0223] It can be understood that this method is applied in near field communication, and therefore, the at least one beam is a beam formed by a spherical wave.

[0224] Optionally, before S810, the method also includes: S840, the network device sends the at least one reference signal to the terminal device through at least one beam, and correspondingly, the terminal device receives the at least one reference signal corresponding to the at least one beam from the network device.

[0225] For the correspondence between the reference signal, the reference signal resource and the beam, please refer to the description in S510 and will not be repeated here.

[0226] For example, the at least one beam may come from the same network device or from different network devices. For details, please refer to the description in S520, which will not be repeated here.

[0227] S820: The terminal device sends first information to the LMF. Correspondingly, the LMF receives the first information from the terminal device.

[0228] Example 1: The first information indicates the reference signal resource corresponding to the beam with the largest RSRP. For example, the first information may specifically include an identifier of the reference signal resource corresponding to the beam with the largest RSRP among at least one beam.

[0229] It is understood that the beam with the largest RSRP here can be the beam with the largest RSRP among the at least one beam, or any beam among the at least one beam whose RSRP is greater than the RSRP threshold. This application does not limit this. For a specific description, please refer to the description of implementation method 1 in S520, which will not be repeated here.

[0230] Optionally, the first information may also include the RSRP value corresponding to the beam with the largest RSRP.

[0231] In Example 2, the first information indicates relative values ​​of N RSRPs corresponding to the N beams. In an example, the first information may further include identifiers of reference signal resources corresponding to the N beams in at least one beam, where one identifier indicates one reference signal resource.

[0232] The relative values ​​of the N RSRPs represent the ratios of the N RSRPs to the RSRP corresponding to the reference beam, where the reference beam is any one of the N beams and N is a positive integer. For details, refer to S520 and will not be repeated here.

[0233] In Example 3, the first information indicates the reference signal resources corresponding to N beams in at least one beam and the RSRP corresponding to the N beams, where N is a positive integer. For example, the first information may specifically include identifiers of the reference signal resources corresponding to N beams in at least one beam and the RSRP corresponding to the N beams.

[0234] S830: The LMF determines the location of the terminal device according to the first information. The following describes how the LMF determines the location of the terminal device with reference to the first information.

[0235] In Example 1, the LMF estimates the position of the terminal device based on the distance and angle corresponding to the beam with the largest RSRP. For details, please refer to the description of the implementation method 1 of S520, which will not be repeated here.

[0236] In Example 2, LMF determines the location of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam, as well as the position and angle information corresponding to the N beams. For example, LMF can traverse the corresponding RSRPs of different positions by formula (2). Estimate the location of the terminal device. For a detailed description, refer to the description of the second implementation method of S520, which will not be repeated here.

[0237] In Example 3, the terminal device can directly send the RSRP corresponding to the N beams to the LMF. The LMF determines the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam. The LMF then determines the location of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam, as well as the position and angle information corresponding to the N beams. For a detailed description, see the description of Implementation Method 2 of S520, which is not repeated here.

[0238] Optionally, before S810, the method further includes: the LMF sending a first request message to the terminal device, the first request message being used to request the terminal device to perform positioning measurement, and the terminal device correspondingly receiving the first request message from the LMF. Thereafter, the terminal device determines the first information. For example, in S820, the terminal device sends a first request response message to the LMF, the first request response message including the first information, and the LMF correspondingly receives the first request response message from the network device.

[0239] For example, the first request message may be the request location information (request location information) in 305 of FIG. 3 , and the first request response message may be the provide location information (provide location information) in S307 of FIG. 3 .

[0240] Exemplarily, if the network device is an O-RAN device, S840 may be implemented by the DU and / or the RU.

[0241] The following describes the process in which the LMF needs to further perform positioning-related operations before the terminal device measures the reference signal after the positioning service is triggered in method 500 and method 800.

[0242] Optionally, method 500 and method 800 may further include: the LMF sends information #1 to the terminal device, and correspondingly, the terminal device receives information #1 from the LMF. Information #1 includes at least one of the following parameters:

[0243] 1) An identifier of at least one reference signal resource, wherein the at least one reference signal resource may be at least one reference signal resource corresponding to at least one beam in method 500 and method 800. Each reference signal resource corresponds to a unique reference signal resource identifier.

[0244] Exemplarily, the reference signal is a PRS, and the identifier of the reference signal may be an identifier of a PRS resource set (PRS resource set ID) and / or an identifier of a PRS resource (PRS resource ID).

[0245] 2) Configuration information of at least one reference signal. For example, the configuration information of the reference signal resource includes configuration information in the time domain and frequency domain.

[0246] 3) Information on the distance and angle corresponding to any one of the at least one beam in method 500 and method 800.

[0247] 4) The relative value of the field strength of at least one reference signal corresponding to at least one beam in method 500 and method 800 at multiple positions corresponding to multiple first combinations. The first combination includes a first distance and a first angle, which can be used to determine the first position. The first distance and the first angle are the distance and angle of the first position relative to the reference antenna of the network device. For example, the first combination includes Among them, the first distance r0 and the first angle are

[0248] For example, the at least one reference signal includes a reference signal #i and a reference signal #k, and the relative field strength ratio of the reference signal #i and the reference signal #k corresponding to the first position of the first combination can be expressed as about The specific meaning of each parameter in is described in formula (7), which will not be repeated here. It can be understood that when parameter 4) includes When , parameter 4) also includes the identifier of the reference signal resource #i corresponding to the reference signal #i.

[0249] For example, parameter 4) also includes an identifier of reference signal resource #k corresponding to reference signal #k.

[0250] For example, since method 800 is LMF-based, information #1 may not carry relevant parameters for calculating the location of the terminal device, for example, it does not need to carry parameters 3) and 4) in information #1, and this application does not limit this.

[0251] For example, information #1 may also be referred to as assistance information. For example, information #1 may be assistance data transfer in 304 of FIG. 3 , or information #1 may be providing assistance information.

[0252] Optionally, before the LMF sends information #1 to the terminal device, method 500 and method 800 may also include: the LMF sends a second request message to the network device, the second request message is used to request information #1, and correspondingly, after receiving the second request message from the LMF, the network device sends a second request response message to the LMF, the second request response message includes information #1, and the corresponding LMF receives the second request response message from the network device.

[0253] For example, the second request message may be the TRP information request (TRP information request) in 302 of FIG. 3 , and the second request response message may be the TRP information response (TRP information response) in S303 of FIG. 3 .

[0254] Optionally, before the LMF sends the second request message to the terminal device, the method 500 and the method 800 may further include: the LMF obtaining near-field positioning capability information from the terminal device, for example, whether the terminal device supports near-field positioning and the supported positioning technology.

[0255] For example, the LMF obtains the UE capability through the LPP capability transfer process in 301 of FIG. 3 , where the UE capability includes the capability information of the UE near-field positioning.

[0256] In addition, the network device in the methods 500 and 800 may send multiple beams for positioning to the terminal device. When resources are limited, multiple beams may be sent in a time-division manner, which may increase the positioning delay or reduce the accuracy and real-time performance of positioning. Therefore, in the present application, the above-mentioned problem can be solved by frequency division. Specifically, the reference signal resources corresponding to the different reference signals described above can be divided into multiple frequency domain units in the frequency domain. The network device can send corresponding reference signals on the resources corresponding to multiple frequency domain units, and the reference signal resources corresponding to each frequency domain unit correspond to different beams. More specifically, the frequency domain unit can be a subcarrier, a resource block (RB), etc. When measuring the reference signal, the terminal device can regard the frequency domain unit with the strongest measured energy as the frequency domain unit corresponding to the reference signal resource, so that the identifier of the frequency domain unit can be determined and / or reported.

[0257] As shown in Figure 9, an ellipse is a beam, and different beams in the figure correspond to different frequency domain units. i Identifies the center frequency of frequency domain unit i. For example, in FIG9 , frequency domain unit 1 corresponding to f1, frequency domain unit 2 corresponding to f2, and frequency domain unit 3 corresponding to f3 form beams at different distances in the same direction.

[0258] For example, the network device can form different beams in different frequency domain units by digital precoding or by analog precoding plus a true time delayer (TTD). This application does not limit the specific implementation method.

[0259] Optionally, based on the above description of the frequency-division transmission beam, the network device described in method 500 and method 800 sends a reference signal to the terminal device, including: the network device sends a reference signal to the terminal device on different frequency domain units of at least one reference signal resource, and correspondingly, the terminal device receives the reference signal from the network device on different frequency domain units of at least one reference signal resource.

[0260] An example is given in which a network device sends a reference signal to a terminal device on different frequency domain units of at least one reference signal resource. For example, taking the reference signal as PRS, the frequency domain resources of PRS resource #1 include frequency domain unit #1 and frequency domain unit #2, and the frequency domain resources of PRS resource #2 include frequency domain unit #3 and frequency domain unit #4. Then, the network device can send PRS #1-1 and PRS #1-2 to the terminal device on frequency domain unit #1 and frequency domain unit #2 corresponding to PRS resource #1, and the network device can send PRS #2-1 and PRS #2-2 to the terminal device on frequency domain unit #3 and frequency domain unit #4 corresponding to PRS resource #2.

[0261] For example, based on the network device sending reference signals on different frequency domain units, information #1 may also include at least one of the following:

[0262] 5) Identification of frequency domain units.

[0263] When the frequency domain resources of the reference signal resources corresponding to the identifier of the reference signal resources indicated by parameter 1) of information #1 can be divided into multiple frequency domain units, the network device can send reference signals through the resources corresponding to different frequency domain units, and each reference signal corresponds to a beam. It can be understood that at this time, the network device can assign an identifier described in parameter 1) to the resources corresponding to each frequency domain unit, that is, the identifier of the frequency domain unit, that is, the identifier corresponding to the reference signal resource described in parameter 1). In another method, in addition to the identifier described in parameter 1), the network device can also assign a new identifier to the resources corresponding to each frequency domain unit. For example, when the frequency domain unit is a subcarrier, the subcarrier serial number can be used as the identifier.

[0264] 6) Configuration information of resources corresponding to different frequency domain units.

[0265] It should be understood that different frequency domain units refer to frequency domain units corresponding to any reference signal resource in at least one reference signal resource.

[0266] For example, frequency domain unit #1 is any frequency domain unit in at least one frequency domain unit corresponding to reference signal resource #1, then the resource information corresponding to frequency domain unit #1 may include the center frequency point of frequency domain unit #1, and / or the offset of the center frequency point of frequency domain unit #1 relative to the center frequency point of reference signal resource #1.

[0267] 7) Taking PRS#1-1 as an example, if PRS#1-1 is sent on the frequency domain unit #1 corresponding to the reference signal resource #1, the information #1 may also include the identifier of the frequency domain unit #1. i，j Indicates the beam corresponding to the reference signal sent on subcarrier #j of reference signal resource #i. At this time, in addition to the relative field strength in parameter 4) and the identifier of reference signal resource #i in parameter 1), the serial number of subcarrier #j can also be provided to uniquely identify the corresponding reference signal or beam.

[0268] In this scenario, the method by which the target terminal device or LMF determines the location of the target terminal device is the same as the aforementioned method. For example, the target terminal device measures the RSRP of the reference signal corresponding to the beams transmitted on different frequency domain units, and determines the location of the target terminal device based on the beam corresponding to the frequency domain unit with the strongest measured RSRP, or the relative RSRP of the beams on different frequency domain units. This description is not further elaborated here.

[0269] The above describes the downlink positioning method in near field communication in detail. The following will continue to introduce the uplink positioning in near field communication.

[0270] Figure 10 is a schematic flow chart of a near-field positioning method 1000 provided by the present application. The method is applicable to uplink positioning and includes the following steps.

[0271] S1010: The terminal device sends a reference signal to the network device. Correspondingly, the network device receives the reference signal from the terminal device.

[0272] Optionally, the reference signal may be an SRS or other reference signals related to positioning, which is not limited in this application.

[0273] S1020, the network device measures a reference signal to obtain a first distance and a first angle corresponding to a first position, wherein the first position is a position within a near-field communication range of the network device, the first distance is the distance between the first position and a reference antenna of the network device, and the first angle is the angle of the first position relative to the reference antenna.

[0274] It should be understood that the first distance and the first angle are used to determine the position of the terminal device. Since the position determined based on the distance and angle corresponding to the first position is the first position, the first position is used as the position of the terminal device in this method.

[0275] In one possible implementation, the network device obtains the first distance and the first angle in the following manner: the network device measures the positioning reference signal sent by the terminal device, obtains the channel H for transmitting the reference signal, and the network device multiplies the channel H with the precoding vectors at different positions. The distance and angle corresponding to the precoding vector with the largest multiplication value are the first distance and the first angle, respectively.

[0276] It can be understood that the different locations here are multiple locations within the near field communication range, and this application does not make specific limitations.

[0277] For example, the network device may obtain the first distance and the first angle based on a Music algorithm in a near field. The following describes in detail the process of obtaining the first distance and the first angle based on the algorithm.

[0278] (1) X is the reference signal received by the network device, N is the noise, A is the steering vector, and S is the reference signal sent by the terminal device, then X satisfies: X = A*S + N

[0279] Where X=[x1(t),x2(t),…,x M (t)] T , M represents the number of antenna elements.

[0280] S=[s1(t),s2(t),…,s D (t)] T , D represents the number of signal sources.

[0281] in, and r represent the angle and distance from the signal source to the array element respectively. M (t)] T .

[0282] (2) According to the theory of matrix eigenvalue decomposition, the covariance matrix of array X is decomposed and MD smaller eigenvalues ​​are selected to construct the noise matrix E n : E n =[v D+1 ,v D+2 ,…,v M ]

[0283] Among them, v D+1 ,v D+2 ,…,v M represents the feature vector.

[0284] (3) Define the spectral function

[0285] Therefore, network devices can Scan and solve the corresponding This allows the location of the terminal device to be determined.

[0286] It should be understood that the above is only an example of obtaining the first distance and the first angle through the Music algorithm. In practice, the first distance and the first angle can also be obtained based on other algorithms, and this application does not limit this.

[0287] Optionally, after measuring the reference signal, the network device may send the measurement result to the LMF, and the LMF may determine the location of the terminal device. The method may further include S1030 and S1040.

[0288] S1030: The network device sends a first distance and a first angle to the LMF. Correspondingly, the LMF receives the first distance and the first angle from the network device.

[0289] S1040, LMF determines the position of the terminal device according to the first distance and the first angle, wherein the position of the terminal device is the first position.

[0290] Optionally, after measuring the reference signal, the network device may independently determine the location of the terminal device based on the measurement result, and the method may further include S1050 and S1060.

[0291] S1050: The network device determines the position of the terminal device according to the first distance and the first angle, wherein the position of the terminal device is the first position.

[0292] S1060: The network device sends the location information of the terminal device to the LMF. Correspondingly, the LMF receives the location information of the terminal device from the network device.

[0293] For example, if the network device is an O-RAN device, S1110 can be implemented by DU and / or RU, and S1120 can be implemented by CU-CP, CU-UP or DU.

[0294] Optionally, this application also implements near-field single-station positioning using a carrier phase method. At least three antennas can be selected on the antenna panel, and the position of the target terminal device can be determined based on the phase or phase difference of the at least three antennas on the antenna panel of the network device when the signal sent by the target terminal device reaches the network device.

[0295] It should be understood that the size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0296] It should also be understood that in some of the above embodiments, devices in existing network architectures are mainly used as examples for illustrative purposes, and it should be understood that the embodiments of the present application do not limit the specific form of the devices. For example, devices that can achieve the same functions in the future are applicable to the embodiments of the present application.

[0297] It can be understood that in the above-mentioned method embodiments, the methods and operations implemented by the device (such as the LMF, terminal device, etc.) can also be implemented by components of the device (such as chips or circuits).

[0298] The method provided by the embodiment of the present application is described in detail above in conjunction with Figures 1 to 10. The above method is mainly introduced from the perspective of the interaction between the LMF and the terminal device. It is understood that in order to implement the above functions, the LMF and the terminal device include the corresponding hardware structures and / or software modules for performing each function.

[0299] Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0300] Hereinafter, the communication device provided by the embodiment of the present application will be described in detail with reference to Figures 11 and 12. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for the content that is not described in detail, please refer to the method embodiment above. For the sake of brevity, some content will not be repeated. The embodiment of the present application can divide the LMF or terminal device into functional modules according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0301] The above describes in detail the data transmission method provided by this application. The following describes the communication device provided by this application. In one possible implementation, the device is used to implement the steps or processes corresponding to the terminal device in the above method embodiment. In another possible implementation, the device is used to implement the steps or processes corresponding to the LMF in the above method embodiment.

[0302] Figure 11 is a schematic block diagram of a communication device 1100 provided in an embodiment of the present application. As shown in Figure 11, the device 1100 may include a communication unit 1110 and a processing unit 1120. The communication unit 1110 can communicate with the outside world, and the processing unit 1120 is used for data processing. The communication unit 1110 may also be referred to as a communication interface or a transceiver unit.

[0303] Optionally, the transceiver unit may include a receiving unit and a sending unit, which is not limited in this application.

[0304] In one possible design, the apparatus 1100 may implement steps or processes corresponding to those executed by the LMF in the above method embodiments, wherein the processing unit 1120 is configured to perform operations related to processing the LMF in the above method embodiments, and the communication unit 1110 is configured to perform operations related to sending the LMF in the above method embodiments. For example, in method 800, the communication unit 1110 may be configured to perform the operations performed by the LMF in S820, and the processing unit 1120 may be configured to perform the operations performed by the LMF in S830.

[0305] In another possible design, the device 1100 may implement steps or processes corresponding to those performed by the terminal device in the above method embodiment, wherein the communication unit 1110 is used to perform the reception-related operations of the terminal device in the above method embodiment, and the processing unit 1120 is used to perform the processing-related operations of the terminal device in the above method embodiment. For example, in method 500, the processing unit 1120 may be used to perform the operations performed by the terminal device in S510 and S520, and the communication unit 1110 may be used to perform the operations performed by the terminal device in S530. For another example, in method 800, the processing unit 1120 may be used to perform the operations performed by the terminal device in S810 and S840, and the communication unit 1110 may be used to perform the operations performed by the terminal device in S820.

[0306] Optionally, the communication device 1100 may further include a storage unit, which may be used to store instructions and / or data. The processing unit 1120 may read the instructions and / or data in the storage unit so that the communication device 1100 implements the aforementioned method embodiment.

[0307] It should be understood that the device 1100 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 1100 can be specifically the LMF in the above embodiment, and can be used to execute the various processes and / or steps corresponding to the LMF in the above method embodiment, or the device 1100 can be specifically the terminal device in the above embodiment, and can be used to execute the various processes and / or steps corresponding to the terminal device in the above method embodiment. To avoid repetition, it will not be described here.

[0308] The apparatus 1100 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the LMF in the above-mentioned method, or the apparatus 1100 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the terminal device in the above-mentioned method. The functions can be implemented by hardware, or the corresponding software can be implemented by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the communication unit can be replaced by a transceiver (for example, the sending unit in the communication unit can be replaced by a transmitter, and the receiving unit in the communication unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the sending and receiving operations and related processing operations in each method embodiment.

[0309] In one implementation, the communication device is a device (e.g., a terminal device, an LMF, or a network device). When the communication device is a device, the transceiver unit may be a transceiver or an input / output interface; the processing unit may be at least one processor or processor-related circuit. Alternatively, the transceiver may be a transceiver circuit (e.g., including a receiving circuit and a transmitting circuit). Alternatively, the input / output interface may be an input / output circuit.

[0310] In another implementation, the communication device is a chip, chip system, or circuit used in a device (e.g., a terminal device, an LMF, or a network device). When the communication device is a chip, chip system, or circuit used in a device, the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be a processor, microprocessor, or integrated circuit integrated in the chip, chip system, or circuit.

[0311] Figure 12 is a schematic block diagram of a communication device 1200 provided in an embodiment of the present application. The device 1200 includes a processor 1210 and a transceiver 1220. The processor 1210 and the transceiver 1220 communicate with each other via an internal connection path. The processor 1210 is configured to execute instructions to control the transceiver 1220 to send and / or receive signals.

[0312] Optionally, the apparatus 1200 may further include a memory 1230, which communicates with the processor 1210 and the transceiver 1220 via an internal connection path. The memory 1230 is used to store instructions, and the processor 1210 may execute the instructions stored in the memory 1230.

[0313] Optionally, the memory 1230 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The memory 1230 is used to store instructions, and the processor 1210 may be used to execute the instructions stored in the memory. When the processor 1210 executes the instructions stored in the memory, the processor 1210 is used to perform the various steps and / or processes of the above-mentioned method embodiments corresponding to the LMF or terminal device.

[0314] Optionally, the communication device 1200 may include one or more memories 1230 .

[0315] Optionally, the memory 1230 may be integrated with the processor 1210 or provided separately.

[0316] In one possible implementation, the apparatus 1200 is configured to implement the various processes and steps corresponding to the LMF in the above method embodiments. For example, in method 800, the transceiver 1220 may be configured to execute the operations performed by the LMF in S820, and the processor 1210 may be configured to execute the operations performed by the LMF in S830.

[0317] In another possible implementation, apparatus 1200 is configured to implement the various processes and steps corresponding to the terminal device in the above-described method embodiments. For example, in method 500, processor 1210 may be configured to execute the operations performed by the terminal device in S510 and S520, and transceiver 1220 may be configured to execute the operations performed by the terminal device in S530. For another example, in method 800, processor 1210 may be configured to execute the operations performed by the terminal device in S810 and S840, and transceiver 1220 may be configured to execute the operations performed by the terminal device in S820.

[0318] In one implementation, the communication device 1200 is a device (e.g., a terminal device, an LMF, or a network device). When the communication device is a device, the transceiver may be an input / output interface; and the processor may be at least one processor-related circuit. Alternatively, the transceiver may be a transceiver circuit (e.g., including a receiving circuit and a transmitting circuit). Alternatively, the input / output interface may be an input / output circuit.

[0319] In another implementation, the communication device 1200 is a chip, chip system, or circuit used in a device (e.g., a terminal device, an LMF, or a network device). The transceiver may be an input / output circuit or a communication interface; the processor may be a processing module, microprocessor, or integrated circuit integrated on the chip. The sending operation of the device in the above method embodiment can be understood as the chip's output, and the receiving operation of the device in the above method embodiment can be understood as the chip's input.

[0320] It should be understood that apparatus 1200 may specifically be the LMF or terminal device described in the above embodiments, or may be a chip or chip system. Correspondingly, transceiver 1220 may be the transceiver circuit of the chip, without limitation herein. Specifically, apparatus 1200 may be used to execute the various steps and / or processes corresponding to the LMF or terminal device in the above method embodiments.

[0321] Optionally, the transceiver includes a transmitter and a receiver, which respectively implement the steps of sending and receiving in the device (e.g., terminal device, LMF, or network device) in the embodiments of the present application. When the device 1200 is a chip, the transmitter and receiver can serve as the input and output interfaces of the chip. The transmitter corresponds to output, and the receiver corresponds to input.

[0322] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0323] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above-mentioned method embodiment can be completed by hardware integrated logic circuits in the processor or by software instructions. The above-mentioned processor can be a general-purpose processor, digital signal processing (DSP), ASIC, field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The processor in the embodiments of the present application can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above-mentioned method.

[0324] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0325] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0326] In addition, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are run on a computer, the operations and / or processes performed by the LMF or terminal device in each method embodiment of the present application are executed.

[0327] The present application also provides a computer program product, which includes computer program code or instructions. When the computer program code or instructions are run on a computer, the operations and / or processes performed by the LMF or terminal device in the various method embodiments of the present application are executed.

[0328] In addition, the present application further provides a chip including a processor. A memory for storing a computer program is provided independently of the chip, and the processor is configured to execute the computer program stored in the memory, so that the operations and / or processing performed by the LMF or the terminal device in any of the method embodiments are performed.

[0329] Furthermore, the chip may further include a communication interface. The communication interface may be an input / output interface, or an interface circuit, etc. Furthermore, the chip may further include a memory.

[0330] In addition, the present application also provides a communication system, including the LMF, terminal equipment and at least one network element in the network equipment in the embodiment of the present application.

[0331] It should also be noted that the memory described herein is intended to comprise, but not be limited to, these and any other suitable types of memory.

[0332] Those skilled in the art will appreciate that the various exemplary units and algorithmic steps described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented using hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application. Those skilled in the art will clearly understand that, for ease of description and brevity, the specific operating processes of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units described is merely a logical functional division. In actual implementation, other divisions may be used, such as multiple units or components being combined or integrated into another system, or some features being omitted or not implemented. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interface, or indirect coupling or communication connection between devices or units, which may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0333] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that can make a contribution or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

[0334] It should be understood that references to "embodiments" throughout this specification mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0335] It should also be understood that in this application, "when", "if" and "if" all mean that the network element will make corresponding processing under certain objective circumstances, which is not a time limit, and does not require the network element to make judgment actions when implementing it, nor does it mean that there are other limitations.

[0336] It should also be understood that in each embodiment of the present application, "A corresponds to B" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, and B can also be determined based on A and / or other information.

[0337] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A near-field positioning method, characterized in that: include: The terminal device measures N reference signals corresponding to N beams from the network device to obtain reference signal received powers RSRP corresponding to the N beams, where N is a positive integer; The terminal device determines the position of the terminal device based on the RSRP corresponding to the N beams and the distances and angles corresponding to the N beams, wherein the distance corresponding to the first beam is the distance between the center position of the first beam and the reference antenna of the network device, the angle corresponding to the first beam is the angle of the center position of the first beam relative to the reference antenna, and the first beam is any one of the N beams.

2. The method according to claim 1, characterized in that The N is equal to 1, and the N beams are the beams with the largest RSRP among at least one beam received by the terminal device from the network device.

3. The method according to claim 1, characterized in that , the N is greater than 1, and the terminal device determines the position of the terminal device according to the RSRP corresponding to the N beams and the distance and angle corresponding to the N beams, including: The terminal device determines the position of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam and the distance and angle corresponding to the N beams, wherein the reference beam is any one of the N beams.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: The terminal device receives a first request message from a location management function LMF, where the first request message is used to request the terminal device to perform a location measurement; The terminal device sends a first request response message to the LMF, and the first request response message includes the location information of the terminal device.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: The terminal device receives first information from the location management function LMF, where the first information includes at least one of the following parameters: Identifiers of N reference signal resources corresponding to the N reference signals, configuration information of the N reference signals, distance and angle information corresponding to any one of the N beams, and relative values ​​of field strength of the N reference signals at multiple first positions corresponding to multiple first combinations, wherein the multiple first combinations and the multiple first positions correspond one-to-one, the first combination includes a first distance and a first angle, and the first distance and the first angle are used to determine the corresponding first position.

6. The method according to claim 5, characterized in that The method further comprises: The terminal device receives the N reference signals from the network device on the N reference signal resources, and the N reference signal resources correspond to different frequency domain units.

7. The method according to claim 6, characterized in that The first information also includes an identifier of a frequency domain unit corresponding to any reference signal resource among the N reference signal resources.

8. A near-field positioning method, characterized in that: include: The terminal device measures at least one reference signal corresponding to at least one beam from the network device to obtain a reference signal received power RSRP corresponding to the at least one beam; The terminal device sends a first message to the location management function LMF, wherein: The first information indicates a reference signal resource corresponding to a beam having a maximum RSRP among the at least one beam; or, The first information indicates RSRPs corresponding to N beams or a ratio of RSRPs corresponding to the N beams to RSRPs corresponding to a reference beam, wherein N is a positive integer and the reference beam is any one of the N beams.

9. The method according to claim 8, characterized in that The method further comprises: The terminal device receives a first request message from the LMF, where the first request message is used to request a positioning measurement for the terminal device; The terminal device sends first information to the location management function LMF, including: The terminal device sends a first request response message to the LMF, where the first request response message includes the first information.

10. The method according to claim 8 or 9, characterized in that: The method further comprises: The terminal device receives second information from the LMF, where the second information includes at least one of the following parameters: The identifier of at least one reference signal resource, the configuration information of the at least one reference signal, the at least one reference signal resource comprising The method includes a reference signal resource corresponding to each reference signal in the at least one reference signal.

11. The method according to any one of claims 8 to 10, characterized in that The method further comprises: The terminal device receives the at least one reference signal from the network device on a reference signal resource corresponding to the at least one reference signal, and the at least one reference signal resource corresponds to different frequency domain units.

12. The method according to claim 10, characterized in that The second information further includes an identifier of a frequency domain unit corresponding to any reference signal resource among the reference signal resources corresponding to the at least one reference signal.

13. A near-field positioning method, characterized in that: include: The location management function LMF receives first information from the terminal device, wherein: The first information indicates a reference signal resource corresponding to a beam having a maximum reference signal received power RSRP among at least one beam received by the terminal device from a network device; or, The first information indicates RSRPs corresponding to the N beams or a ratio of the RSRPs corresponding to the N beams to the RSRP corresponding to a reference beam, wherein the reference beam is any one of the N beams; The LMF determines the location of the terminal device based on the first information.

14. The method according to claim 13, characterized in that The first information indicates a reference signal resource corresponding to a beam with the largest RSRP among at least one beam received by the terminal device from a network device, and the LMF determines the position of the terminal device according to the first information, including: The LMF determines the position of the terminal device based on the corresponding distance and angle of the beam with the largest RSRP, wherein the distance corresponding to the beam with the largest RSRP is the distance between the center position of the beam with the largest RSRP and the reference antenna of the network device, and the angle corresponding to the beam with the largest RSRP is the angle of the center position of the beam with the largest RSRP relative to the reference antenna.

15. The method according to claim 13, characterized in that , the first information indicates the RSRP corresponding to the N beams or the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam, then the LMF determines the position of the terminal device according to the first information, including: The LMF determines the position of the terminal device based on the ratio of the RSRP corresponding to the N beams to the RSRP corresponding to the reference beam and the distance and angle corresponding to the N beams.

16. The method according to any one of claims 13 to 15, characterized in that The method further comprises: The LMF sends a first request message to the terminal device, where the first request message is used to request a positioning measurement for the terminal device; The LMF receives first information from a terminal device, including: The LMF receives a first request response message from a terminal device, where the first request response message includes the first information.

17. The method according to any one of claims 13 to 16, characterized in that The method further comprises: The LMF sends second information to the terminal device, where the second information includes at least one of the following parameters: An identifier of at least one reference signal resource and configuration information of a reference signal corresponding to the at least one beam, wherein the at least one reference signal resource includes a reference signal resource corresponding to each beam in the at least one beam.

18. The method according to claim 17, characterized in that The second information further includes an identifier of a frequency domain unit corresponding to any reference signal resource among the at least one reference signal resource.

19. The method according to claim 17 or 18, characterized in that The method further comprises: The LMF sends a second request message to the network device, where the second request message is used to request the second information; The LMF receives a second request response message from the network device, where the second request response message includes the second information.

20. A near-field positioning method, characterized in that: include: The network device receives a reference signal from the terminal device; The network device measures the reference signal to obtain a first distance and a first angle corresponding to a first position, wherein the first position is a position within a near field communication range of the network device, the first distance is a distance between the first position and a reference antenna of the network device, and the first angle is an angle of the first position relative to the reference antenna; The network device sends the first distance and the first angle to a location management function LMF, The LMF receives the first distance and the first angle from the network device, The LMF determines the position of the terminal device according to the first distance and the first angle, and the position of the terminal device is the first position; or, The network device sends the location information of the terminal device to the LMF, wherein the location of the terminal device is the first location determined based on the first distance and the first angle; The LMF receives location information of the terminal device from the network device.

21. A communication device, characterized in that: The device includes: a module for executing the method as claimed in any one of claims 1 to 7, or a module for executing the method as claimed in any one of claims 8 to 12, or a module for executing the method as claimed in any one of claims 13 to 19, or a module for executing the method as claimed in claim 20.

22. A communication device, characterized in that: include: A processor, configured to execute a computer program stored in a memory so that the apparatus performs the method as claimed in any one of claims 1 to 7, or so that the apparatus performs the method as claimed in any one of claims 8 to 12, or so that the apparatus performs the method as claimed in any one of claims 13 to 19, or so that the apparatus performs the method as claimed in claim 20.

23. A computer-readable storage medium, characterized in that: include: The computer-readable storage medium stores a computer program; when the computer program runs on a computer, the computer executes the method as claimed in any one of claims 1 to 7, or the computer executes the method as claimed in any one of claims 8 to 12, or the computer executes the method as claimed in any one of claims 13 to 19, or the computer executes the method as claimed in claim 20.

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