Angle of arrival and angle of departure system optimization by using antenna information

Patent metadata

Field	Value
Publication number	US-2023366976-A1
Application number	US-202118246660-A
Country	US
Kind code	A1
Filing date	Oct 4, 2021
Priority date	Oct 14, 2020
Publication date	Nov 16, 2023
Grant date	—

Abstract

Disclosed are various techniques for wireless positioning. In an aspect, a user equipment (UE) determines one or more angle-based measurements of one or more reference signal resources transmitted by or received at the UE on one or more antennas of the UE and reports, to a positioning entity, the one or more angle-based measurements, a beam pattern associated with the one or more reference signal resources, a type of the one or more antennas, locations of the one or more antennas on the UE, an orientation of the one or more antennas, or any combination thereof.

First claim

What is claimed is:

1 . A method of wireless communication positioning by a user equipment (UE), comprising:
determining one or more angle-based measurements of one or more reference signal resources transmitted by or received at the UE on one or more antennas of the UE; and reporting, to a positioning entity, the one or more angle-based measurements, a beam pattern associated with the one or more reference signal resources, a type of the one or more antennas, locations of the one or more antennas on the UE, an orientation of the one or more antennas, or any combination thereof.

2 . The method of claim 1 , wherein the one or more angle-based measurements comprise an uplink angle of departure (UL-AoD) measurement.

3 . The method of claim 2 , wherein the one or more reference signal resources comprise one or more sounding reference signals (SRS) resources.

4 . The method of claim 3 , wherein the UL-AoD measurement comprises:
an azimuth angle of a boresight direction in which the one or more SRS resources are transmitted, and an elevation angle of the boresight direction in which the one or more SRS resources are transmitted.

5 . The method of claim 4 , wherein the reporting comprises:
reporting the azimuth angle to the positioning entity in an SRS-azimuth field, and reporting the elevation angle to the positioning entity in an SRS-elevation field.

6 . The method of claim 4 , wherein:
the azimuth angle is reported as a value from 0 to 359.5 degrees with a step size of 0.5 degrees, and the elevation angle is reported as a value from −90 to +90 degrees with a step size of 0.5 degrees.

7 . The method of claim 3 , wherein the beam pattern comprises:
a half-power beam width (HPBW) in a horizontal plane of a beam on which the one or more SRS resources are transmitted, and an HPBW in a vertical plane of the beam on which the one or more SRS resources are transmitted.

8 . The method of claim 7 , wherein the reporting comprises:
reporting the HPBW in the horizontal plane to the positioning entity in an SRS-HPBW-Az field, and reporting the HPBW in the vertical plane to the positioning entity in an SRS-HPBW-El field.

9 . The method of claim 7 , wherein:
the HPBW in the horizontal plane is reported as a value from 0 to 120 degrees with a step size of 0.5 degrees, and the HPBW in the vertical plane is reported as a value from 0 to 120 degrees with a step size of 0.5 degrees.

10 . The method of claim 1 , wherein the orientation of the one or more antennas is reported in a local coordinate system (LCS) of the UE.

11 . The method of claim 10 , wherein reporting the orientation of the one or more antennas comprises:
reporting a bearing angle (α) of the one or more antennas for a translation of the LCS to a global coordinate system (GCS), reporting a downtilt angle (β) of the one or more antennas for the translation of the LCS to the GCS, and reporting a slant angle (γ) of the one or more antennas for the translation of the LCS to the GCS.

12 . The method of claim 1 , wherein the one or more angle-based measurements, the beam pattern associated with the one or more reference signal resources, the type of the one or more antennas, the locations of the one or more antennas on the UE, the orientation of the one or more antennas, or any combination thereof are reported in:
a UE positioning capability report, a request for assistance data, a provide location information message, or any combination thereof.

13 . The method of claim 1 , wherein the one or more angle-based measurements, the beam pattern associated with the one or more reference signal resources, the type of the one or more antennas, the locations of the one or more antennas on the UE, the orientation of the one or more antennas, or any combination thereof are reported in:
uplink control information (UCI), medium access control control element (MAC-CE), radio resource control (RRC) signaling, one or more Long-Term Evolution (LTE) positioning protocol (LPP) messages, or any combination thereof.

14 . The method of claim 1 , wherein the positioning entity comprises:
a location server, a serving base station of the UE, or another UE connected to the UE over a sidelink.

15 . The method of claim 1 , wherein the one or more angle-based measurements comprise a downlink angle of arrival (DL-AoA) measurement.

16 . The method of claim 15 , wherein the one or more reference signal resources comprise one or more positioning reference signals (PRS) resources.

17 . The method of claim 16 , wherein the DL-AoA measurement comprises:
an azimuth angle of a boresight direction in which the one or more PRS resources are received, and an elevation angle of the boresight direction in which the one or more PRS resources are received.

18 . The method of claim 16 , wherein the beam pattern comprises:
a half-power beam width (HPBW) in a horizontal plane of a beam on which the one or more PRS resources are received, and an HPBW in a vertical plane of the beam on which the one or more PRS resources are received.

19 . The method of claim 1 , wherein the beam pattern associated with the one or more reference signal resources and the locations of the one or more antennas are reported in one or more antenna placement and calibration information elements (IEs).

20 . The method of claim 19 , wherein the locations of the one or more antennas comprise x, y, z coordinates of the one or more antennas.

21 . The method of claim 19 , wherein the beam pattern comprises a value from 1 degree to 360 degrees.

22 . The method of claim 1 , wherein the reporting comprises:
reporting the one or more angle-based measurements, the beam pattern associated with the one or more reference signal resources, the locations of the one or more antennas, the orientation of the one or more antennas, or any combination thereof relative to a reference antenna of the one or more antennas.

23 . The method of claim 22 , wherein:
the one or more antennas comprise a plurality of antennas, the one or more angle-based measurements comprise an angle-based measurement associated with each of the plurality of antennas, the beam pattern associated with the one or more reference signal resources comprise a beam pattern associated with each of the plurality of antennas, the locations of the one or more antennas comprise a location of each of the plurality of antennas, and the orientation of the one or more antennas comprises an orientation of each of the one or more antennas.

24 . The method of claim 23 , wherein the reporting comprises:
reporting absolute values for the angle-based measurement, the beam pattern, the location, the orientation, or any combination thereof for the reference antenna; and reporting values for the angle-based measurement, the beam pattern, the location, the orientation, or any combination thereof for remaining antennas of the plurality of antennas relative to the absolute values for the reference antenna.

25 . The method of claim 1 , wherein the type of the one or more antennas comprises an omnidirectional antenna.

26 . The method of claim 1 , wherein the type of the one or more antennas comprises a directional antenna capable of beamforming.

27 . The method of claim 1 , further comprising:
transmitting the one or more reference signal resources on the one or m

Assignees

• Qualcomm Inc

Inventors

• Manolakos Alexandros
• Zhang Xiaoxin
• Siyari Peyman
• Ramasamy Bala

Classifications

• G01S5/08 Primary

  Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location · CPC title

• G01S5/0018

  Transmission from mobile station to base station · CPC title

• G01S5/0236

  Assistance data, e.g. base station almanac · CPC title

• G01S1/08 Primary

  Systems for determining direction or position line · CPC title

• G01S5/0009

  Transmission of position information to remote stations (involving assistance data G01S5/0236) · CPC title