Handover between a cellular system and a wireless local area network

  • US 7,089,005 B2
  • Filed: 07/25/2003
  • Issued: 08/08/2006
  • Est. Priority Date: 07/31/2002
  • Status: Active Grant
First Claim
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1. System for handover of a mobile wireless transmit/receive unit (WTRU) between a cellular network and a wireless local area network (WLAN) comprising:

  • a network communication device in a cellular network for communicating between a WLAN and the cellular network;

    a cellular network communication device in a mobile unit for communicating between the mobile unit and the cellular network;

    a WLAN communication device in the mobile unit for communicating between the mobile unit and the WLAN;

    a WTRU location device in the cellular network for determining the location of the mobile unit;

    a WLAN location device in the cellular network for determining the coverage area of the WLAN;

    a correlation device in the cellular network for correlating the location of the mobile unit with the coverage area of the WLAN;

    an informing device in the cellular network for sending a message to the mobile unit informing the mobile unit of the existence of the WLAN when the mobile unit approaches the coverage area of the WLAN prior to handover;

    a selection device in the mobile unit to provide user selection of the WLAN in response to the message indicating the availability of WLAN coverage, whereby the WTRU is configured to pre-select acceptance of communication through the WLAN; and

    a handoff device in the mobile unit for handing over the mobile unit between the cellular network and the WLAN when the mobile unit is in the corresponding coverage area.

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