Patent ID: 9451485
Filing Date: 2016-09-20
CPC Classification: H04W

Claim Text:
1. A mobile device comprising: a tracker configured to observe multiple distinct groups of ambient identifiable wireless signal (IWS) sources about a mobile device, wherein each group includes a collection of co-observed ambient IWS sources; a misleading-IWS-source detector configured to: determine how many distinct groups in which a particular IWS source appears, wherein the determination includes the misleading-IWS-source detector being configured to: for each ambient IWS source co-observed with the particular IWS source, track a maximum number of ambient IWS sources that were co-observed with the particular IWS source; calculate a weighted value of each ambient IWS source co-observed with the particular IWS source, the calculated weighted value of each ambient IWS source being the multiplicative inverse of its associated maximum value; generate the determined number of distinct groups that the particular IWS source appears by summing the calculated weighted value of the co-observed ambient IWS sources; obtain a validity threshold that indicates a stationary, uniquely identified, and a low-range IWS source, wherein a reception range of a low-range IWS source is 300 feet or less; detect whether the particular IWS source is misleading based upon a comparison of the determined number of distinct groups in which the particular IWS source appeared, to the validity threshold; a blacklister configured to, in response to the detecting, blacklist the particular IWS source so as to exclude the particular IWS source from a location estimation.