Method for performing OTDOA-related operation by terminal in wireless communication system, and apparatus therefor

Patent metadata

Field	Value
Publication number	US-11243291-B2
Application number	US-201816759174-A
Country	US
Kind code	B2
Filing date	Oct 29, 2018
Priority date	Oct 27, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

Disclosed according to various embodiments are a method for performing an observed time difference of arrival (OTDOA)-related operation by a terminal in a wireless communication system, and an apparatus therefor. Disclosed are a method for performing an OTDOA-related operation by a terminal, and an apparatus therefor, the method comprising the steps of: receiving a first positioning signal from a first base station; receiving a second positioning signal from a second base station; measuring a first phase difference between reference signals included in the first positioning signal, and a second phase difference between reference signals included in the second positioning signal; and feeding back, to the first base station, positioning information including the difference value between the first phase difference and the second phase difference.

First claim

The invention claimed is:

1. A method of performing an operation related to observed time difference of arrival (OTDOA) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a first base station, a first positioning signal including two reference signals having a first frequency interval;
receiving, from a second base station, a second positioning signal including two reference signals having a second frequency interval;
measuring a first phase difference between the two reference signals included in the first positioning signal;
measuring a second phase difference between the two reference signals included in the second positioning signal;
calculating a difference value between the first phase difference and the second phase difference; and
reporting, to the first base station, the difference value instead of a value of a reference signal time difference (RSTD),
wherein the difference value is reported to the first base station through transmission of a reference signal having a phase rotated by the difference value.

2. The method of claim 1 , wherein the UE determines whether to apply a predetermined scale value to the difference value based on a magnitude of the difference value.

3. The method of claim 1 , wherein the first phase difference and the second phase difference are preconfigured to any one of 90 KHz and 180 KHz.

4. The method of claim 1 , wherein the predetermined first frequency interval is determined by a location server for estimating a location of the UE.

5. The method of claim 1 , wherein the first frequency interval and the second frequency interval are preconfigured based on channel selectivity.

6. A device for performing an operation related to observed time difference of arrival (OTDOA) in a wireless communication system, the device comprising:
a processor; and
a memory storing instructions that, based on being executed by the processor, control the device to perform operations comprising:
receiving, from a first base station, a first positioning signal including two reference signals having a first frequency interval;
receiving, from a second base station, a second positioning signal including two reference signals having a second frequency interval;
measuring a first phase difference between the two reference signals included in the first positioning signal;
measuring a second phase difference between the two reference signals included in the second positioning signal;
calculating a difference value between the first phase difference and the second phase difference; and
reporting, to the first base station, the difference value instead of a value of a reference signal time difference (RSTD),
wherein the difference value is reported to the first base station through transmission of a reference signal having a phase rotated by the difference value.

7. The device of claim 6 , wherein the processor is configured to receive a user input to switch a drive mode from an autonomous mode to a manual mode, or to switch from a manual mode to an autonomous mode.

Assignees

• Lg Electronics Inc

Inventors

• Chae Hyukjin
• Lee Seungmin

Classifications

• G01S5/02

  using radio waves (using satellite radio beacon systems for determining position G01S19/00) · CPC title

• G01S5/10 Primary

  Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308}) · CPC title

• G01S5/0221

  Receivers · CPC title

• H04W4/029

  Location-based management or tracking services · CPC title

• G01S5/06

  Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements (G01S5/12 takes precedence) · CPC title