US 9,813,863 B2
Enhanced passive positioning with adaptive active positioning
Jubin Jose, Bound Brook, NJ (US); Xinzhou Wu, Hillsborough, NJ (US); and Lionel Jacques Garin, Palo Alto, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 6, 2015, as Appl. No. 14/820,437.
Prior Publication US 2017/0041750 A1, Feb. 9, 2017
Int. Cl. H04W 24/00 (2009.01); H04W 4/02 (2009.01); G01S 5/02 (2010.01); G01S 5/10 (2006.01); H04L 12/841 (2013.01); H04W 24/08 (2009.01)
CPC H04W 4/023 (2013.01) [G01S 5/0263 (2013.01); G01S 5/10 (2013.01); H04L 47/283 (2013.01); H04W 24/08 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method at mobile device, comprising:
obtaining passive measurements of signals transmitted from terrestrial transmitters;
obtaining a first estimated location of said mobile device based, at least in part, on said passive measurements; and
deferring initiating active measurements for said terrestrial transmitters for obtaining a second estimated location of said mobile device until a determination that said first estimated location is not of sufficient quality based, at least in part, on said first estimated location and a spatial configuration of said terrestrial transmitters.