Patent ID: 8493935

Claim:
A wireless communication unit capable of communicating with a plurality of communication networks that are operably coupled to a gateway in a cellular communication system, where the plurality of communication networks employ a respective plurality of radio access technologies, the wireless communication unit comprising: a receiver configured to receive a message from a network device in the cellular communication system; and circuitry, operably coupled to the receiver, configured to determine from the received message a hierarchical policy of network information that applies to the plurality of radio access technologies, wherein the wireless communication unit is attached to a first communication network and the hierarchical policy of network information is segmented according to the first communication network' s mobility management geographical index, the wireless communication unit is in an active mode when attached to the first communication network, such that the circuitry is configured to retrieve a local policy of network information according to the first communication network' s mobility management from the network device, and the local policy is associated with at least one second network, such that the mobility management geographical index of the first communication network indicates that the at least one second communication network is a neighboring network of the first communication network.