Patent ID: 6754502
Filing Date: 2004-06-22
Classification: H04W

Abstract:
A method of locating a wireless communication device comprising the steps of:(a) transmitting a supervisory signal from a base station; (b) receiving said supervisory signal returned from said wireless communication device; (c) determining the range of said wireless communication device from said base station by processing said supervisory signal transmitted in step (a) and received in step (b) including compensating for signal travel time over a loopback path through said wireless communication device and using a stored compensation factor accessed in accordance with identification information transmitted to said base station from said wireless communication device; (d) determining the direction of said wireless communication device relative to said base station in accordance with signals received by said base station from said wireless communication device; and (e) locating said wireless communication device in accordance with the range determined in step (c) and the direction determined in step (d).