Tracking system and method for tracking a movable object carrying a cellular phone unit, and integrated personal protection system incorporating the tracking system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 7, 1996
Issued Date -
N/A
app pub date -
Aug 2, 1994
filing date -
Jun 1, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tracking system for tracking a portable or mobile phone unit utilizes an array of fixed wireless signal transceivers forming part of a wireless telephone system. The phone unit includes a processor for generating an emergency signal on detection of an emergency condition and transmitting the emergency signal to a remote monitoring station via the wireless telephone network. The emergency signal includes identifying information for identifying the phone unit, as well as identifying or control channel signals received by the phone unit from adjacent wireless signal transceivers which are retransmitted as part of the emergency signal to be used at the remote monitoring station to compute an approximate location of the phone unit.
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