Patent ID: 8838137

Claim:
A method comprising: receiving, by a data processing system, (i) a measure of a propagation delay of a first signal traveling between a wireless terminal and a base station, and (ii) a measure of a location-dependent trait of a second signal that is received by the wireless terminal; designating, by the data processing system, at least one of a plurality of possible locations of the wireless terminal as improbable based on i) the measure of the propagation delay of the first signal and ii) a measure of a propagation delay of a third signal traveling between the base station and an infrastructure antenna that is used to provide wireless telecommunications service; and estimating, by the data processing system, the location of the wireless terminal based on: (i) the measure of the location-dependent trait of the second signal, and (ii) one or more possible locations of the wireless terminal not designated as improbable.