Patent ID: 8583107

Claim:
A system for providing call mobility between a cellular network and a home wireless network for a dual-mode phone having a cellular identity and a home identity, wherein the home identity is active when the dual-mode phone is in communication with the home wireless network, the system comprising: a residential gateway to connect the home wireless network to a public network; the residential gateway configured to communicate, via the public network, with a VoIP service provider in communication with a mobile switching center on the cellular network and the public network; the residential gateway further configured to receive a signal from the dual-mode phone to the residential gateway for initiating the movement of a call between the cellular network and the home wireless network while the call is ongoing, wherein the signal is a DTMF key sequence received by the residential gateway from the dual-mode phone on a voice channel previously established between the dual-mode phone and the residential gateway; the residential gateway being further configured to interpret the signal and bridge the call; and wherein all calls to the dual-mode phone are anchored in the residential gateway with voice traffic being routed through the residential gateway; wherein the proxy server is an SIP proxy server and the registrar server is an SIP registrar server, wherein the residential gateway comprises a broadband communication port to facilitate communication with the public network, a wireless access point to facilitate communication with wireless devices on the home wireless network, a proxy server, and a registrar server, and the residential gateway is provisioned with an identity mapping table containing the cellular identity and the home identity of the dual-mode phone and provides a mapping from the home identity to the cellular identity and vice-versa.