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Method and apparatus for spanning operation of a cellular telephone

  • US 6,643,512 B1
  • Filed: 09/14/1999
  • Issued: 11/04/2003
  • Est. Priority Date: 09/14/1999
  • Status: Expired due to Term
First Claim
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1. A method for spanning operation of a cellular telephone simultaneously between a public cellular system for packet services and an autonomous cellular system for circuit services in communication with the public cellular system, wherein the public cellular system covers a first geographic region and the autonomous cellular system covers a second geographic region, the first geographic region intersecting the second geographic region, the method comprising the steps of:

  • receiving a pointer to a public control channel associated with the public cellular system via an autonomous broadcast control channel associated with the autonomous cellular system in communication with the public cellular system;

    transmitting an attach message to the public cellular system via the public control channel, the attach message being indicative of a request for packet services;

    receiving a success message from the public cellular system via the public control channel, the success message being indicative of a positive acknowledgment to the attach message;

    transmitting a first registration message to the autonomous cellular system via the public control channel using a first tunneling protocol, the first registration message being indicative of a request to initiate circuit services;

    receiving a circuit page message from the autonomous cellular system via the public control channel using a second tunneling protocol, the circuit page message being indicative of a request to accept a pending cellular telephone voice call; and

    transmitting a page response message to the autonomous cellular system via the autonomous broadcast control channel, the page response message being indicative of a positive acknowledgment to the circuit page message.

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