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Method and apparatus for controlling access to a communication system

  • US 5,274,368 A
  • Filed: 09/15/1992
  • Issued: 12/28/1993
  • Est. Priority Date: 02/15/1991
  • Status: Expired due to Term
First Claim
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1. A method for controlling access to a communication system, comprising the base site steps of:

  • receiving a signal representing a request from a communication unit to access the communication system, the signal including at least an identification code and another code at least a portion of which represents when the communication unit was authorized to access the communication system;

    processing at least the identification code to initially determine that the communication unit should not be permitted access to the communication system;

    processing at least the other code to determine whether the communication unit was authorized to access the communication system within a time interval; and

    permitting access to the communication system when the base site determines that the communication unit was authorized to access the communication system within the time interval.

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