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Subscriber authentication for radio local loop system

  • US 5,987,316 A
  • Filed: 10/30/1996
  • Issued: 11/16/1999
  • Est. Priority Date: 07/31/1996
  • Status: Expired due to Term
First Claim
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1. A method of subscriber authentication in a static radio local loop system, comprising the steps of:

  • monitoring one or more characteristics of signals received at the base station purporting to be from a subscriber station, said one or more characteristics being indicative of the distance between said purported subscriber station and said base station;

    comparing said one or more characteristics with stored information indicative of the expected distance between the corresponding genuine subscriber station and said base station; and

    producing a failed-authentication signal if said one or more characteristics do not agree with said stored information.

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