Patent ID: 9369884
Filing Date: 2016-06-14
CPC Classification: G01S,G06Q,G08G,H04W,Y10S

Claim Text:
1. A method comprising: determining characteristics of signals received from Wi-Fi access points during a traversal of a number of drivable streets within a geographic area having a radius of one or more miles, the characteristics of a given signal including a unique identifier of a Wi-Fi access point that transmitted the signal, a location where the signal was observed, and an observed signal strength at the location where the signal was observed; calculating geographic location of each of the Wi-Fi access points in the geographic area based on locations where the signal of the Wi-Fi access point was observed and the observed signal strength at the locations where the signal of the Wi-Fi access point was observed, wherein the calculating utilizes a reverse triangulation algorithm; storing the geographic location of each of the Wi-Fi access points in records of reference database, the records storing information descriptive of Wi-Fi access points in the geographic area; maintaining the reference database on a non-transitory computer readable medium; receiving a request for a current location of a mobile device; obtaining an observed signal strength of one or more Wi-Fi access points observed by the mobile device from the current location; and computing the current location of the mobile device using at least the observed signal strength of the one or more Wi-Fi access points observed by the mobile device in comparison to the information descriptive of Wi-Fi access points in the geographic area in the reference database.