Patent ID: 8918103
Filing Date: 2014-12-23
Classification: G01S,H04W

Abstract:
1. A method performed by one or more computers, the method comprising: receiving, by a server and from a mobile device, a device location and a plurality of signal measurements, each signal measurement being a measurement of a signal from a different signal source; determining that, according to location data stored in a location database, a portion of signal sources are located in a signal source cluster, the signal source cluster being defined by a threshold number of the signal sources and a reliability threshold distance, wherein the signal source cluster comprises at least the threshold number of the signal sources located within the reliability threshold distance of one another; determining that a distance between the device location and a location of at least one signal source in the signal source cluster satisfies the reliability threshold distance; upon determining that the distance satisfies the reliability threshold distance, designating the device location as a trustworthy device location; determining that a first signal measurement of a first signal from a first signal source among the signal sources indicates a conflict between detection of the first signal and a signal source location of the first signal source as stored in the location data, including determining that the trustworthy device location is located outside of a maximum detection area surrounding the signal source location; and upon determining the conflict, designating the first signal source as an outlier signal source, including designating the signal source location of the first signal source as stored in the location database for update.