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Registration of mobile packet data terminals after disaster

  • US 6,771,634 B1
  • Filed: 04/09/1999
  • Issued: 08/03/2004
  • Est. Priority Date: 06/10/1996
  • Status: Expired due to Fees
First Claim
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1. A method of controlling registration attempt by a terminal using a contention protocol to communicate with a central system, the method comprising:

  • transmitting a registration index from the central system to the terminal at specified temporal periods; and

    modifying the value of the registration index when the terminal should attempt to register with the central system, wherein modifying the value of the registration index comprises modifying when a routing table included in the central system becomes unusable.

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