US 12,069,536 B2
Revising an unstable location fingerprint database for an area
Gennadii Berkovich, Calgary (CA); Dmitry Churikov, Calgary (CA); and Iurii Kotik, Calgary (CA)
Assigned to InvenSense, Inc., San Jose, CA (US)
Filed by InvenSense, Inc., San Jose, CA (US)
Filed on Jan. 7, 2020, as Appl. No. 16/735,761.
Claims priority of provisional application 62/820,823, filed on Mar. 19, 2019.
Prior Publication US 2020/0304952 A1, Sep. 24, 2020
Int. Cl. H04W 24/00 (2009.01); H04W 4/02 (2018.01); H04W 4/029 (2018.01); G01R 33/10 (2006.01); G01S 5/02 (2010.01); G01S 5/16 (2006.01); G01S 5/18 (2006.01)
CPC H04W 4/029 (2018.02) [H04W 4/026 (2013.01); H04W 4/027 (2013.01); G01R 33/10 (2013.01); G01S 5/0252 (2013.01); G01S 5/16 (2013.01); G01S 5/18 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method of revising an unstable location fingerprint database for an area, the method comprising:
accessing a plurality of initial location fingerprint databases comprising at least a stable location fingerprint database and an unstable location fingerprint database;
collecting signal measurement data together with motion-based data from each of a plurality of portable devices transiting a portion of the area of the unstable location fingerprint database;
determining reference positions associated with locations in the unstable location fingerprint database by using the stable location fingerprint database to process the collected signal measurement data and the motion-based data into the reference positions; and
employing the reference positions and the signal measurement data to revise unstable data in the unstable location fingerprint database.