Patent ID: 7769379

Claim:
A method of selecting an interface for accessing a core network over an unlicensed mobile access network, wherein the method uses a mobile terminal and a network controller for unlicensed mobile access, the method comprising: sending a request message from a mobile terminal to a network controller for unlicensed mobile access, wherein the request message is configured to request a registration of radio resources for unlicensed mobile access; including an indication into the request message by the mobile terminal which interface mode the mobile terminal supports, wherein the interface mode is either using an Iu interface between a radio access network for unlicensed mobile access and a core network, or an Gb interface between the radio access network for unlicensed mobile access and the core network; selecting the interface mode by the network controller for unlicensed mobile access; sending an accept message from the network controller for unlicensed mobile access to the mobile terminal, wherein the accept message is configured to indicate an acceptance of the registration of radio resources for unlicensed mobile access; and including another indication into the accept message by the network controller for unlicensed mobile access, wherein the interface mode that has been selected is indicated.