Patent ID: 6542823
Filing Date: 2003-04-01
Classification: G01S,H04W

Abstract:
A geolocation system, comprising:a geolocation server, wherein the geolocation server receives at least one signal from at least one GPS satellite; and a wireless communications device, comprising a GPS receiver section, the GPS receiver being selectively switchable between a standalone mode and at least one other mode for determining a geolocation of the wireless communications device, the at least one other mode is selected from a group comprising an autonomous mode, a network aided mode, a network centric mode, and a reverse aiding mode, wherein the wireless communication device selectively sends the determined geolocation of the wireless communication device to the geolocation server, the wireless communications device periodically transmitting a frequency reference message to the GPS receiver, and wherein the frequency reference message steers the call processing clock onto the base station clock.