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Method and system for switching a radio access technology between wireless communication systems with a multi-mode wireless transmit/receive unit

  • US 7,924,785 B2
  • Filed: 03/11/2005
  • Issued: 04/12/2011
  • Est. Priority Date: 03/12/2004
  • Status: Expired due to Fees
First Claim
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1. A method implemented in a multi-mode wireless transmit/receive unit (WTRU), the method comprising:

  • receiving a service from a core network via a cellular access network;

    sending a first message via the cellular access network, the first message indicating that the WTRU is capable of communicating using wireless local area network (WLAN) technology;

    receiving a second message via the cellular access network, wherein the second message is responsive to the first message and includes Service Set Identifiers (SSIDs) indicating WLANs available for handoff;

    selecting one of the WLANs indicated by the SSIDs;

    initiating a handover to the selected WLAN; and

    in response to the handover, receiving the service from the core network via the selected WLAN.

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