Patent ID: 6560462
Filing Date: 2003-05-06
Classification: H04W

Abstract:
For use in a wireless network comprising a plurality of base stations capable of communicating with a plurality of mobile stations, a mobile station locating system associated with a first one of said plurality of base stations for determining the location of a first one of said plurality of mobile stations, said mobile station position locating system comprising:a timer capable of measuring a first round trip delay time associated with a position locator message transmitted from said first base station to said first mobile station and a position locator acknowledgment message transmitted from said first mobile station back to said first base station; a power monitor capable of measuring a power level of said position locator acknowledgment message received by said first base station and determining that said received power level has saturated a receiver associated with said first base station; and a data processor coupled to said timer and to said power monitor capable of causing said first base station to transmit at least one power control message to said first mobile station capable of causing said first mobile station to increase a transmission power level of said position locator acknowledgment message, said increased transmission power level causing said receiver to saturate, wherein said data processor, in response to a determination that said first base station receiver has saturated, calculates from said first round trip delay time a first distance between said first mobile station and said first base station.