| 摘要 |
A novel method of and system for enabling the use of one portable cellular phone only, in voice communication with a cellular network control center fo r voice-requesting position or location data services, and, with the aid of a vehicle GPS-transponder activated in response to signaling from the control center over cellular network channel control paths, to receive and process a t the vehicle GPS location data from satellites, and to transmit the data over the said channel control paths to the control center, for then sending therefrom to the user of the portable cellular phone.
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