System and method for detection of fraud in a wireless telephone system
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United States of America Patent
Stats
-
Aug 17, 1999
Grant Date -
N/A
app pub date -
Jun 27, 1996
filing date -
Jun 27, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for the detection of fraudulent use of a wireless telephone system includes a signature analyzer to analyze the transmission characteristic of an unauthenticated transmitter. If the system authenticates the transmitter, based on stored records, the system establishes a customer call profile, based on the geographical location of the wireless telephone at the time of the calls, as well as a time period in which the communication occurs. The system uses these records to establish a customer call profile. The system analyzes a subsequent call and the customer call profile to designate the subsequent call as valid or invalid. The system overrides the decision of the signature analyzer that a particular unauthenticated wireless telephone is fraudulent if the values for call parameters of the subsequent call are sufficiently close to the corresponding parameter values in the customer call profile. The system is adaptive in that old call data records are periodically deleted, thus allowing their replacement with newer call data records.
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