Patent ID: 8848585

Claim:
A method for managing power of a user device having a plurality of interfaces, the method comprising: exchanging information regarding centralized reachability states with a base station, the centralized reachability states defining vendor and technology independent descriptions of power and reachability modes of the user device; determining a first set of centralized reachability states, wherein the centralized reachability states comprise a reachable directly state, a reachable via another interface state, and a not reachable state, and wherein the user device is in the reachable directly state when a first interface of the user device is in an in-service mode, a power save mode, or in an extended power save mode, the user device is in the reachable via another interface state when the first interface of the user device is shut off or out of range of a first wireless network, and the user device is reachable via a second interface configured to communicate with a second wireless network, and the user device is in the not reachable state when the first interface of the user device is shut off or out of range of the first wireless network, and the user device is not reachable via the second interface configured to communicate with the second wireless network; mapping the first set of centralized reachability states to physical power states of the plurality of interfaces; and controlling the physical power states of the plurality of interfaces based on the mapping, the controlling comprising controlling one of the plurality of interfaces in accordance with a signal received from the base station via another one of the plurality of interfaces.