Positioning method and apparatus

Patent metadata

Field	Value
Publication number	US-2022015060-A1
Application number	US-202117486703-A
Country	US
Kind code	A1
Filing date	Sep 27, 2021
Priority date	Mar 28, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

This application provides a positioning method and an apparatus. The method includes: A location management device provides assistance information for a terminal device, where the assistance information includes information about one or more cells used for positioning of the terminal device and reference signal configuration information of each of the one or more cells. The location management device provides a first request message for the terminal device, where the first request message includes measurement reporting configuration information. The location management device receives a reference signal measurement result of each of the one or more cells from the terminal device, where the reference signal measurement result is obtained based on the measurement reporting configuration information. The location management device obtains a DAOD of the terminal device relative to each of the one or more cells based on the reference signal measurement result.

First claim

What is claimed is:

1 . A method performed by a location management device, the method, comprising:
providing assistance information for a terminal device, the assistance information comprising information about one or more cells for positioning the terminal device and reference signal configuration information of each of the one or more cells; providing, by the location management device, a first request message for the terminal device, the first request message comprising measurement reporting configuration information; receiving, by the location management device, a reference signal measurement result of each of the one or more cells from the terminal device, the reference signal measurement result being obtained based on the measurement reporting configuration information; and determining, by the location management device based on the reference signal measurement result, a downlink angle of departure (DAOD) of the terminal device relative to each of the one or more cells.

2 . The method according to claim 1 , further comprising:
receiving, by the location management device, capability information of the terminal device from the terminal device; and determining, by the location management device, the reference signal configuration information and the measurement reporting configuration information based on the capability information of the terminal device, wherein the capability information of the terminal device comprises at least one of the following:
a quantity of receive beams;
a quantity of receive antenna panels;
whether path power reporting is supported; and
a quantity of paths whose powers can be reported when path power reporting is supported.

3 . The method according to claim 1 , further comprising:
receiving, by the location management device, a second request message from the terminal device, the second request message comprising information about a special cell in which the terminal device is located; and determining, by the location management device based on the information about the special cell, the one or more cells to be used for determination of terminal device position.

4 . The method according to claim 3 , wherein the second request message comprises a result of measurement performed by the terminal device on a historical downlink reference signal in at least one cell, at least one of the cells being the same as the one or more cells used to determine terminal device position; the method further comprising:
determining, by the location management device, the reference signal configuration information based on the measurement result performed by the terminal device.

5 . The method according to claim 4 , the measurement result performed by the terminal device on the historical downlink reference signal in the at least one cell comprising at least one of the following:
a reference signal received power (RSRP) measured by the terminal device based on serving cell channel state information (CSI) obtaining/beam management framework configuration; an RSRP measured by the terminal device based on serving cell mobility management configuration; and an RSRP of a reference signal for another purpose measured by the terminal device based on configuration of the location management device.

6 . The method according to claim 1 , the reference signal configuration information comprising at least one of the following information of a reference signal: time domain resource information, frequency domain resource information, and sequence information.

7 . The method according to claim 6 , the reference signal comprising any one of the following: a channel state information reference signal (CSI-RS), a positioning reference signal (PRS), or a synchronization signal block (SSB).

8 . The method according to claim 1 , the reference signal configuration information comprising baseline resource configuration information used by the terminal device for path power measurement.

9 . The method according to claim 1 , the measurement reporting configuration information comprising at least one of the following:
a quantity of to-be-reported reference signal received powers (RSRPs); whether a path power needs to be reported; and a quantity of powers to be reported in each path when the path power needs to be reported.

10 . The method according to claim 1 , the reference signal measurement result comprising at least one of reference signal received power (RSRP) and path power.

11 . A positioning method performed by a terminal device, comprising:
receiving assistance information from a location management device, the assistance information comprising information about one or more cells used for positioning of a terminal device and reference signal configuration information of each of the one or more cells; receiving a first request message from the location management device, wherein the first request message comprises measurement reporting configuration information; receiving a reference signal from the one or more cells based on the reference signal configuration information; measuring the received reference signal based on the measurement reporting configuration information, to obtain a reference signal measurement result of the one or more cells; and sending a positioning message to the location management device, wherein the positioning message comprises the reference signal measurement result of the one or more cells.

12 . The method according to claim 11 , further comprising:
sending capability information of the terminal device to the location management device, wherein the capability information of the terminal device comprises at least one of the following: a quantity of receive beams, a quantity of receive antenna panels, whether path power reporting is supported, and a quantity of paths whose powers can be reported when path power reporting is supported.

13 . The method according to claim 11 , the method further comprising:
sending a second request message to the location management device, the second request message comprising information about a special cell in which the terminal device is located.

14 . The method according to claim 13 , the second request message comprising a result of measurement performed by the terminal device on a historical downlink reference signal in at least one cell, at least one of the cells being the same as the one or more cells used to determine terminal device position.

15 . The method according to claim 14 , wherein the result of measurement performed by the terminal device on the historical downlink reference signal in the at least one cell comprises at least one of the following:
a reference signal received power (RSRP) measured by the terminal device based on serving cell channel state information (CSI) obtaining/beam management framework configuration; an RSRP measured by the terminal device based on serving cell mobility management configuration; and an RSRP of a reference signal measured by the terminal device based on configuration of the location management device.

16 . The method according to claim 11 , the reference signal configuration information comprising at least one of the following information of the reference signal: time domain resource information, frequency domain resource information, and sequence information.

17 . The method according to claim 16 , wherein the reference signal comprises any one of the following: a channel state information reference signal (CSI-RS), a positioning reference signal (PRS), or a synchronization signal block (SSB).

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Yi

Classifications

• H04W64/00

  Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management · CPC title

• H04W8/24

  Transfer of terminal data · CPC title

• H04B17/327 Primary

  Received signal code power [RSCP] · CPC title

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title