US 11,940,546 B2
User equipment position determination using an uplink random access channel message
Yuwei Ren, Beijing (CN); Huilin Xu, Temecula, CA (US); and Alexandros Manolakos, Escondido, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 17/310,518
Filed by QUALCOMM Incorporated, San Diego, CA (US)
PCT Filed Feb. 10, 2020, PCT No. PCT/CN2020/074616
§ 371(c)(1), (2) Date Aug. 6, 2021,
PCT Pub. No. WO2020/173296, PCT Pub. Date Sep. 3, 2020.
Prior Publication US 2022/0099787 A1, Mar. 31, 2022
Int. Cl. G01S 5/02 (2010.01); G01S 5/06 (2006.01); H04L 5/00 (2006.01); H04W 74/0833 (2024.01)
CPC G01S 5/02213 (2020.05) [G01S 5/06 (2013.01); H04L 5/0051 (2013.01); H04W 74/0833 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a base station, comprising:
transmitting, to a user equipment (UE), an instruction that triggers the UE to transmit an uplink random access channel (RACH) message, the instruction identifying at least a RACH preamble index corresponding to a RACH preamble to be used for the uplink RACH message;
transmitting, to a plurality of neighbor base stations, information that identifies at least the RACH preamble index;
receiving the uplink RACH message from the UE;
receiving, from the plurality of neighbor base stations, feedback that indicates respective timings with which the uplink RACH message was received by the plurality of neighbor base stations; and
estimating a position of the UE based at least in part on a timing with which the uplink RACH message was received by the base station and at least two of the respective timings with which the uplink RACH message was received by the plurality of neighbor base stations.