Abstract: A computer implemented method includes determining, at a Wireless Local Area Network (WLAN) base station, that a mobile device capable of communicating via a Wireless Wide Area Network (WWAN) and via the WLAN is within a range of the WLAN base station. The computer implemented method includes sending a registration message including an Internet Protocol (IP) address from the WLAN base station to the mobile phone device. The mobile device sends a call forwarding message from the mobile phone device to a network element of the WWAN after receiving the registration message. The call forwarding message redirects a call destined for the mobile phone device to the WLAN base station for transmission to the mobile phone device. The computer implemented method includes receiving the redirected call from the WWAN.

Abstract: A computer implemented method includes determining, at a Wireless Local Area Network (WLAN) base station, that a mobile device capable of communicating via a Wireless Wide Area Network (WWAN) and via the WLAN is within a range of the WLAN base station. The computer implemented method includes sending a registration message including an Internet Protocol (IP) address from the WLAN base station to the mobile phone device. The mobile device sends a call forwarding message from the mobile phone device to a network element of the WWAN after receiving the registration message. The call forwarding message redirects a call destined for the mobile phone device to the WLAN base station for transmission to the mobile phone device. The computer implemented method includes receiving the redirected call from the WWAN.

Abstract: A multi-mode cellular and voice over internet protocol mobile device and a supporting network is disclosed. The mobile device includes a housing, an antenna, a wide area cellular communications module to provide wide area cellular communications, and a short-range wireless local area network module to provide a wireless communications interface to a wireless local area network having voice over internet protocol capability. In a particular embodiment, an internet protocol address managed by a wireless LAN base station is forwarded to and stored by the mobile phone device. In another embodiment, a method of forwarding a call from a mobile phone to a wireless LAN base station is disclosed. In another illustrative embodiment, a method of communicating from a wireless LAN base station to a mobile phone is disclosed.