Method of detecting use of a stolen communication unit
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United States of America Patent
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Jun 10, 1997
Issued Date -
N/A
app pub date -
Dec 11, 1995
filing date -
Apr 12, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
Unauthorized access of a wireless communication system may be prevented by providing a communication apparatus. The communication apparatus includes a communication unit (102) and a proximity user card (115). The proximity user card (115) communicates user identification information with the communication unit (102) over a second RF communication path (119). The user identification information indicates whether the proximity (115) is within a predetermined distance of the communication unit (102). When the proximity user card (115) is separated by more than the predetermined distance, the communication unit (102) will transmit an invalid proximity message to the central controller (101).
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