Patent ID: 8054814

Claim:
A method for an interworking device to interwork with a first network to support signaling between a terminal and a second network, the method comprising: setting, with the first network, a first wireless data path following a first wireless communication protocol; setting a first radio link following a second wireless communication protocol with the terminal; receiving an authentication message through the first radio link; transmitting the authentication message to an authentication server of the second network through the first wireless data path so that the authentication server of the second network may perform an authentication process for the terminal; setting a second wireless data path following the second wireless communication protocol with the terminal when the authentication process performed by the authentication server of the second network is finished; after the setting of the second wireless data path, receiving a first address allocation message from the terminal through the second wireless data path; transmitting the first address allocation message to an address allocation server of the second network through the first wireless data path so that the address allocation server of the second network may allocate a first network address for the terminal; receiving the first network address through the first wireless data path; and transmitting the first network address to the terminal through the second wireless data path.