EP-4738893-A1 - POSITIONING METHOD, APPARATUS, CHIP SYSTEM, AND STORAGE MEDIUM

EP4738893A1EP 4738893 A1EP4738893 A1EP 4738893A1EP-4738893-A1

Abstract

A positioning method and apparatus, a chip system, and a storage medium are provided, to perform more accurate positioning based on information that indicates a reflective surface of a path. In this application, a first apparatus receives at least one first signal. The first apparatus determines first information based on measurement results of a plurality of paths of the at least one first signal, where the first information includes information that indicates reflective surfaces of the plurality of paths. Because the first information may indicate the reflective surfaces of the plurality of paths, the first information may be used to assist in constructing an accurate geometric relation model between the plurality of paths, so that when a location management apparatus solves location information of a to-be-positioned apparatus based on the geometric relation model, accuracy of the location information can be improved.

Inventors

YU, YINGJIE
HUANG, SU

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240724

Claims (20)

A positioning method, wherein the method is applied to a first apparatus, and the method comprises: receiving, by the first apparatus, at least one first signal; and determining, by the first apparatus, first information based on measurement results of a plurality of paths of the at least one first signal, wherein the first information comprises information that indicates reflective surfaces of the plurality of paths.
The method according to claim 1, wherein the information that indicates the reflective surfaces of the plurality of paths comprises at least one of the following: information that indicates a type of the reflective surface of the path; information that indicates a material of the reflective surface of the path; information that indicates a reflectivity of the reflective surface of the path; information that indicates reflected energy of the reflective surface of the path; information that indicates a surface feature of the reflective surface of the path; information that indicates a direction of the reflective surface of the path; or information that indicates a location of the reflective surface of the path.
The method according to claim 1 or 2, wherein the method further comprises: sending, by the first apparatus, the first information.
The method according to any one of claims 1 to 3, wherein before determining, by the first apparatus, the first information based on the measurement results of the plurality of paths of the at least one first signal, the method further comprises: receiving, by the first apparatus, first configuration information, wherein the first configuration information comprises information about a reflective surface of a to-be-searched path; and measuring, by the first apparatus, the at least one first signal based on the first configuration information, to obtain the measurement results of the plurality of paths of the at least one first signal.
The method according to claim 4, wherein the information about the reflective surface of the to-be-searched path comprises at least one of the following: information that indicates a type of the reflective surface of the to-be-searched path; information that indicates a material of the reflective surface of the to-be-searched path; information that indicates a reflectivity of the reflective surface of the to-be-searched path; information that indicates reflected energy of the reflective surface of the to-be-searched path; information that indicates a surface feature of the reflective surface of the to-be-searched path; information that indicates a direction of the reflective surface of the to-be-searched path; or information that indicates a location of the reflective surface of the to-be-searched path.
The method according to any one of claims 1 to 5, wherein the method further comprises: obtaining, by the first apparatus, second configuration information, wherein the second configuration information indicates that a second signal is associated with a spatial relation of a first path, and the second configuration information further indicates that a third signal is associated with a spatial relation of a second path; and sending, by the first apparatus, the second signal and the third signal based on the second configuration information.
A positioning method, wherein the method is applied to a location management apparatus, and the method comprises: receiving, by the location management apparatus, first information, wherein the first information is determined based on measurement results of a plurality of paths of at least one first signal, and the first information comprises information that indicates reflective surfaces of the plurality of paths; and determining, by the location management apparatus, location information of a to-be-positioned apparatus based on the first information.
The method according to claim 7, wherein the information that indicates the reflective surfaces of the plurality of paths comprises at least one of the following: information that indicates a type of the reflective surface of the path; information that indicates a material of the reflective surface of the path; information that indicates a reflectivity of the reflective surface of the path; information that indicates reflected energy of the reflective surface of the path; information that indicates a surface feature of the reflective surface of the path; information that indicates a direction of the reflective surface of the path; or information that indicates a location of the reflective surface of the path.
The method according to claim 7 or 8, wherein before receiving, by the location management apparatus, the first information, the method further comprises: sending, by the location management apparatus, first configuration information, wherein the first configuration information comprises information about a reflective surface of a to-be-searched path.
The method according to claim 9, wherein the information about the reflective surface of the to-be-searched path comprises at least one of the following: information that indicates a type of the reflective surface of the to-be-searched path; information that indicates a material of the reflective surface of the to-be-searched path; information that indicates a reflectivity of the reflective surface of the to-be-searched path; information that indicates reflected energy of the reflective surface of the to-be-searched path; information that indicates a surface feature of the reflective surface of the to-be-searched path; information that indicates a direction of the reflective surface of the to-be-searched path; or information that indicates a location of the reflective surface of the to-be-searched path.
The method according to any one of claim 7 to 10, wherein after receiving, by the location management apparatus, the first information, the method further comprises: sending, by the location management apparatus, second information based on the first information, wherein the second information comprises fourth information and/or the information that indicates the reflective surfaces of the plurality of paths; and the fourth information indicates that a second signal is associated with a spatial relation of a first path, and the fourth information further indicates that a third signal is associated with a spatial relation of a second path.
A positioning method, wherein the method is applied to a second apparatus, and the method comprises: receiving, by the second apparatus, second information, wherein the second information is obtained based on measurement results of a plurality of paths of at least one first signal received by a first apparatus; and sending, by the second apparatus, second configuration information based on the second information, wherein the second configuration information indicates that a second signal is associated with a spatial relation of a first path, the second configuration information further indicates that a third signal is associated with a spatial relation of a second path, and the second configuration information is used by the first apparatus to send the second signal and the third signal.
The method according to claim 12, wherein the second information comprises: information that indicates reflective surfaces of the plurality of paths; and/or fourth information, wherein the fourth information indicates that the second signal is associated with the spatial relation of the first path, and the fourth information further indicates that the third signal is associated with the spatial relation of the second path.
A positioning apparatus, wherein the apparatus comprises a processor and an interface circuit; and the processor is configured to: receive at least one first signal through the interface circuit; and determine first information based on measurement results of a plurality of paths of the at least one first signal, wherein the first information comprises information that indicates reflective surfaces of the plurality of paths.
The apparatus according to claim 14, wherein the information that indicates the reflective surfaces of the plurality of paths comprises at least one of the following: information that indicates a type of the reflective surface of the path; information that indicates a material of the reflective surface of the path; information that indicates a reflectivity of the reflective surface of the path; information that indicates reflected energy of the reflective surface of the path; information that indicates a surface feature of the reflective surface of the path; information that indicates a direction of the reflective surface of the path; or information that indicates a location of the reflective surface of the path.
The apparatus according to claim 14 or 15, wherein the interface circuit is further configured to: send the first information.
The apparatus according to any one of claims 14 to 16, wherein the interface circuit is further configured to: receive first configuration information, wherein the first configuration information comprises information about a reflective surface of a to-be-searched path; and the processor is further configured to: measure the at least one first signal based on the first configuration information, to obtain the measurement results of the plurality of paths of the at least one first signal.
The apparatus according to claim 17, wherein the information about the reflective surface of the to-be-searched path comprises at least one of the following: information that indicates a type of the reflective surface of the to-be-searched path; information that indicates a material of the reflective surface of the to-be-searched path; information that indicates a reflectivity of the reflective surface of the to-be-searched path; information that indicates reflected energy of the reflective surface of the to-be-searched path; information that indicates a surface feature of the reflective surface of the to-be-searched path; information that indicates a direction of the reflective surface of the to-be-searched path; or information that indicates a location of the reflective surface of the to-be-searched path.
The apparatus according to any one of claims 14 to 18, wherein the processor is further configured to: obtain second configuration information, wherein the second configuration information indicates that a second signal is associated with a spatial relation of a first path, and the second configuration information further indicates that a third signal is associated with a spatial relation of a second path; and send the second signal and the third signal based on the second configuration information through the interface circuit.
A positioning apparatus, wherein the apparatus comprises a processor and an interface circuit; and the processor is configured to: receive first information through the interface circuit, wherein the first information is determined based on measurement results of a plurality of paths of at least one first signal, and the first information comprises information that indicates reflective surfaces of the plurality of paths; and determine location information of a to-be-positioned apparatus based on the first information.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202311021975.8, filed with the China National Intellectual Property Administration on August 11, 2023 and entitled "POSITIONING METHOD AND APPARATUS, CHIP SYSTEM, AND STORAGE MEDIUM", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of positioning technologies, and in particular, to a positioning method and apparatus, a chip system, and a storage medium. BACKGROUND With rapid development of communication technologies, high-precision positioning is gradually determined as an important research project in a 5th generation mobile communication system (5th generation mobile networks or 5th generation wireless systems, 5G) of the 3rd generation partnership project (3rd generation partnership project, 3GPP). Scenarios of new radio (New Radio, NR) positioning mainly include: enhanced mobile broadband (enhanced mobile broadband, eMBB) outdoor, eMBB indoor, ultra-reliable low-latency communication (ultra-reliable low-latency communication, URLLC), and massive machine-type communications (massive machine-type communications, mMTC)/internet of things (internet of things, IoT). Features such as high security, scalability, high availability, and precision assurance in high-speed application are also required. In a 3GPP standard, a plurality of positioning technologies such as a downlink time difference of arrival (downlink time of arrival, DL-TDOA), a downlink angle of departure (downlink angle of departure, DL-AOD), an uplink time difference of arrival (uplink time of arrival, UL-TDOA), an uplink angle of arrival (uplink angle of arrival, UL-AOA), and a round trip time (round trip time, RTT) are supported. Positioning technologies may be mainly classified into an uplink positioning technology, a downlink positioning technology, and an uplink/downlink positioning technology. The uplink positioning technology includes, for example, the UL-AOA. In this technology, a base station may measure a signal sent by a terminal, to obtain an angle of arrival (angle of arrival, AOA). The angle of arrival may be used to estimate a location of the terminal. The uplink/downlink positioning technology includes, for example, the RTT. In this positioning technology, a terminal and a base station each need to measure time of arrival of a received signal, to obtain an RTT through solving. In all the positioning technologies, apparatuses that participate in positioning need to send signals, and a measurement result of the signals may be used to position a to-be-positioned apparatus. How to improve positioning accuracy becomes a problem that needs to be urgently resolved currently. SUMMARY Embodiments of this application provide a positioning method and apparatus, a chip system, and a storage medium, to perform more accurate positioning based on information that indicates a reflective surface of a path. For example, a base station sends at least one positioning reference signal (positioning reference signal, PRS), and a terminal measures the at least one PRS to obtain measurement results of a plurality of paths. The terminal sends a sounding reference signal (sounding reference signal, SRS) in transmission directions of these paths. Measurement values such as angles of arrival and round trip times RTTs corresponding to the SRS and the PRS may be used to solve a location of the terminal. However, the transmission directions of the plurality of paths obtained by the terminal are not fixed. Some paths may be direct paths, some paths may be reflection paths reflected by a ground, and some paths may be reflection paths reflected by a wall. When the transmission directions of the plurality of paths are different, several relations constructed based on the plurality of paths may be different, and algorithms that are used to solve location information and that correspond to the different geometric relations may also be different. For example, a path is a direct path, and another path is a ground reflection path. In this scenario, in a geometric relation constructed based on the plurality of paths, location information may be solved according to an algorithm #1. For another example, a path is a direct path, and another path is a wall reflection path. In this scenario, in a geometric relation constructed based on the plurality of paths, location information needs to be solved according to an algorithm #2. However, in an existing solution, a location management apparatus cannot distinguish between the geometric relations between the plurality of paths that are measured by the UE, and therefore cannot find an accurate geometric relation model. However, in solutions provided in this application, the location management apparatus may obtain first information, and the first information may indicate reflective surfaces of the plurality of paths. The location management apparatus may constru