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Method for detecting fraudulent use of a communications system

  • US 6,266,525 B1
  • Filed: 12/17/1998
  • Issued: 07/24/2001
  • Est. Priority Date: 12/17/1998
  • Status: Expired due to Term
First Claim
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1. A method for detecting fraud in wireless communications system comprising:

  • establishing one or more call events in a wireless call sequence based on potential call activities of subscriber stations;

    assigning codes corresponding to each of the subscriber stations, in response to occurrences of said call events, such that each subscriber station has a distinguishable code from all other subscriber stations even if at least two of the subscriber stations share a common subscriber identity;

    maintaining a database of subscriber identities supplemented by the codes such that a unique combination of the code and the subscriber identity uniquely identifies each subscriber station;

    identifying identical or common subscriber identities with corresponding different codes in the database, any common subscriber identities with different codes being indicative of potentially fraudulent activity on the communications system.

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