A wireless transmit/receive unit (WTRU) includes a mobility management function and a multihoming function. The mobility management function may implement the Media Independent Handover (MIH) protocol and the multihoming function may implement the Shim6 protocol. The mobility management function may communicate link status information to the multihoming function. Based on the link status information, the multihoming function may accelerate or decelerate a link failure detection procedure, may modify a list of possible paths for consideration for a path exploration procedure, and/or may determine to initiate a path exploration procedure. The multihoming function may communicate to the mobility management function that additional communications resources are required. In response, the mobility management function may activate an inactive radio interface. Subsequent path exploration procedures may include the exploration of paths that may be established over the activated radio interface.