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System and method for call handoff between circuit switched and packet data wireless networks

  • US 20060154665A1
  • Filed: 12/20/2005
  • Published: 07/13/2006
  • Est. Priority Date: 01/13/2005
  • Status: Active Grant
First Claim
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1. A method of hand off from a serving one of a packet data or circuit switched wireless network to a target one of the networks, for a hybrid mobile terminal capable of communications through both networks and engaged in an existing call through the serving wireless networks, comprising:

  • receiving a new call from the mobile terminal through the target wireless network, the new call having a predetermined called party identifier;

    in response to the called party identifier, routing the new call back to the mobile terminal through the serving wireless network; and

    connecting the existing call to the mobile terminal through the target wireless network.

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