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Method and system for integrating media independent handovers

  • US 7,746,825 B2
  • Filed: 12/23/2005
  • Issued: 06/29/2010
  • Est. Priority Date: 05/16/2005
  • Status: Active Grant
First Claim
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1. A wireless transmit/receive unit (WTRU) operable in an unlicensed mobile access (UMA) wireless communication network, the WTRU comprising:

  • a processor configured to operate;

    a UMA protocol stack including a physical (PHY) layer, a medium access control (MAC) layer, and a plurality of higher layers including a UMA radio resource control (UMA-RR) layer operable to facilitate mobility of the WTRU;

    a cellular protocol stack including a PHY layer, a MAC layer, and a plurality of higher layers; and

    a media independent handover (MIH) entity configured to communicate MIH information for mobility management between the UMA PHY layer, the UMA MAC layer, and the UMA-RR layer via an MIH service access point (MIH-SAP), wherein the MIH entity is configured to;

    monitor handover related information through an information service;

    collect the handover related information;

    receive information from a higher layer of the cellular protocol stack via a cellular link SAP;

    create a compound message containing information relating to the UMA protocol stack and the cellular protocol stack;

    compare the information in the compound message to a threshold;

    generate a handover trigger on a condition that the information in the compound message exceeds the threshold; and

    communicate the trigger to an upper level of the UMA protocol stack on a condition that the threshold is exceeded.

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