Patent ID: 7038590
Filing Date: 2006-05-02
Classification: G08B

Abstract:
1. A personal security and tracking system comprising: a portable signaling unit including a GPS receiver for receiving a GPS signal including position information for the portable signaling unit, and a cellular telephone antenna adapted to transmit a cellular digital packet data (CDPD) signal that includes the position information; a central dispatch station located remote from the portable signaling unit and adapted to transmit a control signal, the central dispatch station including a computer adapted to determine a location of the portable signaling unit based at least in part on the position information received in the CDPD signal; and a cellular telephone system adapted to receive the CDPD signal from the portable signal unit and re-transmit the CDPD signal to the central dispatch station, and to receive the control signal from the central dispatch station and re-transmit the control signal to the portable signaling unit, thereby providing two-way digital communication between the portable signaling unit and the central dispatch station.