Patent ID: 8942709
Filing Date: 2015-01-27
Classification: H04W

Abstract:
1. A method for routing incoming calls directed to a dual-mode device, the method comprising: updating a database in a VoIP based wireless local area network with routing information of the dual mode device in a wireless telecommunication network; wherein the dual-mode device is identified by a single dialable address that is functional in either network, the single dialable address being mapped to a Session Initiation Protocol (SIP) address; in response to an incoming call being routed to a VoIP based wireless local area network, an entity in the VoIP based wireless local area network querying the database to determine whether the dual-mode device is active and receiving calls in the VoIP based wireless local area network; when the dual-mode device is determined to be operating in the VoIP based wireless local area network, using a SIP INVITE message to route the incoming call to the dual-mode device; and when the dual-mode device is determined to be operating in the wireless telecommunication network, redirecting the incoming call to the wireless telecommunication network.