Patent ID: 8032133

Claim:
A method, comprising: receiving location information of a communicator connected to an unlicensed radio spectrum access network or another radio access network; determining a routing area identity for the unlicensed radio spectrum access network based on said location information, wherein the determining comprises selecting the routing area identity for the unlicensed radio spectrum access network based on another routing area identity of said another radio access network; obtaining a mapping of the routing area identity to an internet protocol address of a serving network entity from a domain name server; and selecting, in a circuit switched part of a controller of the unlicensed radio spectrum access network, the serving network entity using the internet protocol address of the serving network entity, the serving network entity comprising a packet switched part of an unlicensed network controller separate from the circuit switched part, wherein the selecting is based on the mapping of the routing area identity to the internet protocol address of the serving network entity, and wherein the serving network entity is configured to provide services for said communicator using at least said unlicensed radio spectrum access network and said another radio access network.