System and method of transitioning between cellular and voice over internet protocol communication

  • US 20050096024A1
  • Filed: 11/05/2003
  • Published: 05/05/2005
  • Est. Priority Date: 11/05/2003
  • Status: Active Grant
First Claim
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1. A method of forwarding a call from a mobile phone, the method comprising:

  • determining that the mobile phone is within range of a wireless local area network base station with voice over internet protocol capability;

    receiving an internet protocol address associated with the wireless local area network base station;

    sending a call forwarding message including the internet protocol address from the mobile phone to a remote cellular network element of a wide area cellular network.

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