Chan, Anthony Hing-HungAnthony Hing-HungChanXia, Y.Sarikaya, B.2022-06-232022-06-232010-07-01https://repository.sfu.edu.hk/handle/sfu/3503International Patent Publication No.: WO 2010/075431 A1An apparatus comprising a mobile node (MN) comprising a first radio interface and at least one second radio interface, wherein a point of service (PoS) is configured to communicate with the MN via the first radio interface to proxy the second interface, and wherein the first interface is an active interface and the second interface is a powered off interface. Also included is an apparatus comprising at least one processor configured to implement a method comprising setting an interface between a MN and a network in a powered off mode, tracking the mobility of the MN on behalf of the network when the interface is powered off, and waking up the interface when a call arrives in the network for the interface.entechnical documentation