US 12,445,996 B2
Distributed time synchronization for time difference of arrival (TDOA) using ultra-wideband (UWB)
Varun Amar Reddy, San Diego, CA (US); Alexandros Manolakos, Escondido, CA (US); Pooria Pakrooh, San Diego, CA (US); and Krishna Kiran Mukkavilli, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Feb. 21, 2023, as Appl. No. 18/172,092.
Claims priority of provisional application 63/268,592, filed on Feb. 25, 2022.
Prior Publication US 2023/0276403 A1, Aug. 31, 2023
Int. Cl. H04W 64/00 (2009.01); H04L 5/00 (2006.01); H04W 72/0453 (2023.01); H04W 72/1273 (2023.01)
CPC H04W 64/003 (2013.01) [H04L 5/0048 (2013.01); H04W 72/0453 (2013.01); H04W 72/1273 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method of designating a new synchronization reference anchor for a group of radio frequency (RF) positioning anchors to enable downlink Time Difference of Arrival (DL-TDoA) positioning of mobile devices, the method comprising:
obtaining, at a current synchronization reference anchor for the group of RF positioning anchors, metric information from each RF positioning anchor of the group of RF positioning anchors; and
selecting, with the current synchronization reference anchor, the new synchronization reference anchor from the group of RF positioning anchors based at least in part on the metric information.