Patent ID: 7536188
Filing Date: 2009-05-19
Classification: G01S,H04L,H04W

Abstract:
1. A method for locating a communication device, comprising: using a first active identification device located within a first communication device, identifying at least a first passive identification tag; providing information identifying said at least a first passive identification tag from said first communication device to a location server; determining from an identity of said at least a first passive identification tag provided by said first active identification device a first vicinity of said first communication device, wherein said first passive identification tag has a known location, wherein said known location of said first passive identification tag is a fixed location, and wherein said determining a first vicinity of said first communication device includes determining that said first active identification device located within said first communication device is in the vicinity of the location of the first passive identification tag; and using a second active identification device in a vicinity of said first communication device, identifying a second passive identification tag located within said first communication device; providing information identifying said second passive identification tag from the second active identification device to said location server; determining from an identity of said second passive identification tag provided by said second active identification device a second vicinity of said first communication device, wherein said second active identification device has a known location, wherein said known location of said second active communication device is a fixed location, wherein said determining a second vicinity of said first communication device further includes determining that said second passive identification tag located within said first communication device is in the vicinity of the second active communication device, wherein said first active identification device and said first passive identification tag comprise a first communication pair, wherein said second active identification device and said second passive identification tag comprise a second communication pair, and wherein said first vicinity of said first communication device overlaps said second vicinity of said first communication device.