US 11,895,500 B2
Using positioning techniques to detect false base stations
Ravi Agarwal, San Diego, CA (US); Gavin Bernard Horn, La Jolla, CA (US); Alexandros Manolakos, Escondido, CA (US); and Jay Kumar Sundararajan, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 30, 2020, as Appl. No. 17/084,848.
Claims priority of provisional application 62/949,377, filed on Dec. 17, 2019.
Prior Publication US 2021/0185535 A1, Jun. 17, 2021
Int. Cl. H04W 64/00 (2009.01); H04W 12/122 (2021.01); H04W 12/63 (2021.01); H04W 12/104 (2021.01)
CPC H04W 12/122 (2021.01) [H04W 12/104 (2021.01); H04W 12/63 (2021.01); H04W 64/003 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A method of detecting outlier cells based on positioning of a user equipment (UE), comprising:
determining a set of a plurality of cells detectable by the UE;
calculating a plurality of location estimates for the UE based on positioning measurements of a corresponding plurality of subsets of the plurality of cells;
identifying a subset of cells of the plurality of subsets that provides a best location estimate for the UE of the plurality of location estimates, wherein the best location estimate maximizes a set of inlier cells of the plurality of cells, and wherein the set of inlier cells comprises one or more cells of the plurality of cells, other than the subset of cells, for which actual positioning measurements of the one or more cells are within a threshold of expected positioning measurements of the one or more cells;
calculating a final location estimate for the UE based on positioning measurements of the subset of cells and the set of inlier cells;
identifying any remaining cells of the plurality of cells other than the subset of cells and the set of inlier cells as at least one outlier cell; and
performing a mitigation operation based on identifying the at least one outlier cell.