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METHOD AND APPARATUS FOR HANDOVER AND SESSION CONTINUITY USING PRE-REGISTRATION TUNNELING PROCEDURE

  • US 20090017826A1
  • Filed: 07/09/2008
  • Published: 01/15/2009
  • Est. Priority Date: 07/09/2007
  • Status: Active Grant
First Claim
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1. A method for session initiation protocol (SIP) based handover of a wireless transmit receive unit (WTRU) between a 3rd Generation Partnership Project (3GPP) system and a non-3GPP system, the WTRU having a first radio transceiver a second radio transceiver, where one of the first and second radio transceivers is configured for communication with a 3GPP system and another of the first and second radio transceivers is configured for communication with a non-3GPP system, the method comprising:

  • receiving information of a handover target system on a physical (PHY) layer of the first radio transceiver;

    transferring the received target system information to a radio resource control layer and a media access control layer of the second transceiver using a crossover connection between the first radio transceiver and the second radio transceiver; and

    performing pre-authentication and pre-registration procedures by upper layers of the second transceiver.

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