Patent ID: 7979086

Claim:
A method for communication between a wireless wide area network (WWAN) and a wireless local area network (WLAN), said WWAN including a WWAN data register that contains a first data record for a multi-mode mobile station, said method comprising: receiving, at a WLAN data register, a registration notification message comprising information regarding service registration for said multi-mode mobile station; registering said multi-mode mobile station by storing a second data record regarding said multi-mode mobile station in said WLAN data register; sending, from said WLAN data register, at least one registration notification configured to facilitate roaming of said multi-mode mobile station by indicating that said multi-mode mobile station is operating in a wireless coverage area of said WLAN; receiving, at said WLAN data register, a routing request for said registered multi-mode mobile station; and in response to said routing request, sending, from said WLAN data register, routing information to route a call to said registered multi-mode mobile station.