Nokia Corporation

Nokia Telecommunications Oy

Jarmo Virtanen

Heikki Juhani Einola

Miikka Huomo

Tuomas Niemelä

Juha Matti Pirkola

Tero Koskivirta

Aki Petteri Mikkonen

Jari Liukkonen

A method selects a network entity in a communication system. The method includes receiving, in a controller entity of an unlicensed radio spectrum access network, location information of a communication device connected to one of the unlicensed radio spectrum access network and another access network. The method further includes determining a routing area indication based on the location information. The method further includes selecting, based on the routing area indication, a serving network entity, which provides services for the communication device using at least the unlicensed radio spectrum access network and the another radio access network. Furthermore, a computer program, a controller entity and a communication system are configured to execute the method.

Selecting a network entity

According to an embodiment of the present invention, a system is provided that includes a cellular network, a Public Switched Telephone Network (PSTN) and a mobile IP-telephony network (MIPTN). Both the cellular network and the MIPTN include a Home Function and one or more visited Functions. MIPTN subscribers can roam within the MIPTN. Also, a Gateway Function interfaces the PSTN and the MIPTN to allow roaming between the cellular network and the MIPTN. The Gateway Function performs a dynamic mapping function between PSTN/cellular addresses (e.g., in E.16440 format) and MIPTN addresses (e.g., IP addresses) to allow registration and call delivery for subscribers roaming between the cellular network and the MIPTN. A similar type of Gateway Function also allows Short Message Service (SMS) messages to be delivered over the MIPTN as well.

Short message service support over a packet-switched telephony network

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Helsinki, Finland

Jarmo Virtanen