Patent ID: 7746825

Claim:
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.