Patent ID: 8781469

Claim:
A telecommunications system operable to provide a facility for mobile communications to a mobile device, the system comprising: a core network, an access control function, and a plurality of radio access networks, each radio access network operable to communicate data to and from the mobile device in accordance with one of a plurality of radio access technologies, and in response to an attach request from the mobile device requesting a connection via a chosen radio access technology with the core network, the core network is operable to establish a connection with the mobile device via at least one of the plurality of radio access technologies for communicating data to and from the mobile device, wherein the access control function is operable to identify the mobile device requesting the connection with the core network and in accordance with one or more access control criteria to generate an attach response indicating whether the mobile device may establish the connection with the chosen radio access technology and communicating the attach response to the radio access network via which the mobile device has requested the connection.