Method of detecting unauthorized use of a communication unit

  • US 5,535,431 A
  • Filed: 04/05/1994
  • Issued: 07/09/1996
  • Est. Priority Date: 04/05/1994
  • Status: Expired due to Term
First Claim
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1. In a wireless communication system, a method for detecting unauthorized use of a communication unit, the method comprising the steps of:

  • a) transmitting, by the communication unit, an affiliation message to a central controller via the wireless communication system;

    b) determining, by the central controller, whether a location information is included in the affiliation message;

    c) when the location message is not included in the affiliation message, transmitting, by the central controller, a request for the location information to the communication unit via the wireless communication system;

    d) determining, by the central controller, whether the location information of the communication unit deviates from a historical location pattern of the communication unit; and

    e) when the location information deviates from the historical location pattern, indicating, by the central controller, that the communication unit is a potential unauthorized communication unit.

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