US 12,442,911 B2
Double-differential round trip time measurement
Weimin Duan, San Diego, CA (US); Alexandros Manolakos, Escondido, CA (US); and Ning Luo, Cupertino, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 18/253,500
Filed by QUALCOMM Incorporated, San Diego, CA (US)
PCT Filed Jan. 6, 2022, PCT No. PCT/US2022/011474
§ 371(c)(1), (2) Date May 18, 2023,
PCT Pub. No. WO2022/155050, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 20210100028 (GR), filed on Jan. 14, 2021.
Prior Publication US 2024/0012130 A1, Jan. 11, 2024
Int. Cl. G01S 13/74 (2006.01); G01S 7/40 (2006.01); H04W 64/00 (2009.01)
CPC G01S 13/74 (2013.01) [G01S 7/40 (2013.01); H04W 64/00 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A method of operating a position estimation entity, comprising:
obtaining a first differential round trip time (RTT) measurement based on a first RTT measurement between a user equipment (UE) and a first wireless node and a second RTT measurement between the UE and a second wireless node;
obtaining a second differential RTT measurement based on a third RTT measurement between a third wireless node and the first wireless node and a fourth RTT measurement between the third wireless node and the second wireless node; and
determining a positioning estimate of the UE based at least in part on the first differential RTT measurement and the second differential RTT measurement.