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Seamless Call Switching In A Dual Mode Environment

  • US 20090191864A1
  • Filed: 04/06/2009
  • Published: 07/30/2009
  • Est. Priority Date: 11/20/2003
  • Status: Abandoned Application
First Claim
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1. A method for use by a mobile communication device in switching a voice call between two different wireless communication networks, the method comprising the steps of:

  • maintaining voice communications for a voice call with a communication terminal through call control equipment, the voice call involving a traffic channel established between a first wireless network and the mobile device with use of a first transceiver portion which operates in accordance with the first wireless network;

    causing a connecting call to be established with the communication terminal through the call control equipment based on identifying a predetermined condition, the connecting call involving a traffic channel established between a second wireless network and the mobile device using a second transceiver portion which operates in accordance with the second wireless network; and

    after the connecting call is established, maintaining voice communications for the voice call over the traffic channel established between the second wireless network and the mobile device.

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