Method and device for measuring position

Patent metadata

Field	Value
Publication number	US-11129130-B2
Application number	US-201716956550-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 21, 2017
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

According to an embodiment of the present specification, a method for measuring a position by a terminal in a wireless communication system can be provided. The method for measuring a position by a terminal may comprise the steps of: receiving MIB information from a base station by a terminal; setting a reference for time on the basis of the received MIB information; receiving a positioning-related signal from the base station by the terminal; measuring the positioning-related signal; and acquiring distance information and orientation information of the terminal on the basis of the measured positioning-related signal. The terminal is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.

First claim

The invention claimed is:

1. A method of performing positioning by a user equipment (UE) in a wireless communication system, the method performed by the UE and comprising:
receiving, from a base station (BS), master information block (MIB) information;
setting a time reference based on the MIB information;
receiving, from the BS, a positioning-related signal allocated to a plurality of beams;
measuring received power information of two beams having a largest signal strength among the plurality of beams based on the positioning-related signal; and
obtaining distance information about the UE and direction information about the UE based on the measured positioning-related signal,
wherein the direction information is obtained from the received power information based on information of direction angles allocated to the two beams.

2. The method according to claim 1 , wherein the positioning-related signal includes a time stamp, and the time stamp is information about a transmitted time of the positioning-related signal.

3. The method according to claim 2 , further comprising obtaining information about a measured time of the positioning-related signal,
wherein the distance information about the UE is obtained by using the information about the measured time of the positioning-related signal based on the set time reference and the time stamp.

4. The method according to claim 3 , wherein the UE and the BS share information about an absolute time based on the set time reference.

5. The method according to claim 4 , wherein the UE and the BS share the information about the absolute time at an orthogonal frequency division multiplexing (OFDM) symbol level based on the set time reference.

6. The method according to claim 3 , wherein the distance information is measured based on a difference between the information about the measured time of the positioning-related signal and the time stamp.

7. The method according to claim 1 , wherein the information of the direction angles of the plurality of beams is shared between the UE and the BS.

8. The method according to claim 1 , wherein the MIB information is periodically broadcast by the BS.

9. A user equipment (UE) for performing positioning in a wireless communication system, the UE comprising:
a receiver configured to receive a signal;
a transmitter configured to transmit a signal; and
a processor configured to control the receiver and the transmitter,
wherein the processor is configured to:
receive, from a base station (BS), master information block (MIB) information;
set a time reference based on the MIB information;
receive, from the BS, a positioning-related signal allocated to a plurality of beams;
measure received power information of two beams having a largest signal strength among the plurality of beams based on the positioning-related signal; and
obtain distance information about the UE and direction information about the UE based on the measured positioning-related signal,
wherein the direction information is obtained from the received power information based on information of direction angles allocated to the two beams.

10. The UE according to claim 9 , wherein the positioning-related signal includes a time stamp, and the time stamp is information about a transmitted time of the positioning-related signal.

11. The UE according to claim 10 , wherein the processor is configured to further obtain information about a measured time of the positioning-related signal, and obtain the distance information about the UE by using the information about the measured time of the positioning-related signal based on the set time reference and the time stamp.

12. The UE according to claim 11 , wherein the UE and the BS share information about an absolute time based on the set time reference.

13. The UE according to claim 12 , wherein the UE and the BS share the information about the absolute time at an orthogonal frequency division multiplexing (OFDM) symbol level based on the set time reference.

14. The UE according to claim 11 , wherein the distance information is measured based on a difference between the information about the measured time of the positioning-related signal and the time stamp.

15. The UE according to claim 9 , wherein the information of the direction angles of the plurality of beams is shared between the UE and the BS.

16. The UE according to claim 15 , wherein the MIB information is periodically broadcast by the BS.

Assignees

• Lg Electronics Inc

Inventors

• Ku Gwanmo
• Han Sangwook
• Lee Woonghee

Classifications

• H04B17/27

  for locating or positioning the transmitter · CPC title

• G01S3/12

  Means for determining sense of direction, e.g. by combining signals from directional antenna or goniometer search coil with those from non-directional antenna (determining direction by amplitude comparison of signals derived by combining directional and non-directional signals G01S3/24, G01S3/34) · CPC title

• H04W4/029

  Location-based management or tracking services · CPC title

• H04W4/40 Primary

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title

• H04W16/28

  using beam steering · CPC title