Patent ID: 7640026

Claim:
A localization method of a mobile station communicating with at least one central server through a wireless network comprising a plurality of wireless radio frequency transmitting access points, comprising: measuring the signal strengths received by said mobile station from the plurality of access points; storing each measured signal strength with an address identifying the corresponding connected access point; comparing said stored signal strengths to values of a predetermined table of signal strength thresholds assigned to access points, the signal strength thresholds defining one or more event zones (EZ), at least one of the one or more each event zone (EZ) comprising multiple attenuation ranges of multiple access points, wherein the multiple access points comprise a first access point and a second access point configured to be in the same event zone and a first signal attenuation range around the first access point is different from a second signal attenuation range around the second access point in the same event zone; and considering the mobile station as located in a given event zone if the measured signal strength corresponding to a selected access point in the given event zone is within a pre-determined attenuation range of the selected access point.