Patent ID: 7031280
Filing Date: 2006-04-18
Classification: H04W

Abstract:
1. A wireless communication unit arranged and constructed for operation within a communication network comprising a first communication network and a second communication network, the wireless communication unit comprising: a transceiver configured to support an air interface with the first communication network and with the second communication network; a controller arranged to control and cooperatively operate with the transceiver; to exchange messages corresponding to call appearance information with a network switch in the first communication network, wherein to exchange the messages corresponding to the call appearance information further comprises querying the network switch and receiving the call appearance information from the network switch, wherein the controller is operable to decide whether a call within the second communication network can be handed in based on a comparison of the call appearance information and local call appearance information for calls in the second communication network, a favorable comparison indicating the decision is affirmative; to decide whether a call within the second communication network can be handed in to the first communication network based on the exchange of the messages corresponding to the call appearance information and provide a corresponding decision; and to initiate a handing of the call to the first communication network only when the decision is affirmative.