Patent ID: 6847825
Filing Date: 2005-01-25
Classification: G01S

Abstract:
1. A method of voice and GPS satellite constellation positional location data radio communication over a cellular phone network having a user cellular radio voice channel path communicating at a cellular phone network frequency with a network operations control center, and a separate data radio channel path separately communicating along a different frequency with said network operations control center, the method comprising user voice-calling the control center from a portable cellular telephone location over the cellular radio frequency voice path, requesting user location and other information services; upon user verification, sending a radio wake-up signal from the control center over the data different frequency channel path to be received at said location; installing a radio transponder operable at said different frequency and a GPS receiver of GPS satellite constellation location data transmission frequency and a microprocessor module at said location; activating the GPS receiver, in response to receipt of said wake-up radio signal by the transponder, to receive and process the location data received at the GPS frequency from the GPS satellite constellation by the GPS receiver and thereupon to activate the transponder to transmit the processed location data over the data channel path to said control center; associating the transmitted location data received at the control center with the user voice call request at the control center; and sending location services information from the control center to the user over the cellular radio frequency voice channel path.