Roaming arrangement

A wireless terminal equipment configured to set up a data transmission connection at least with a wireless local network, wherein

• the terminal equipment is configured to receive public land mobile network identifiers and network element identifiers linked therewith,
• the terminal equipment is configured to select a public land mobile network on the basis of a comparison of said received public land mobile network identifiers and the public land mobile network identifiers contained in the terminal equipment,
• the terminal equipment is configured to set up a connection via the local network to a network element defined by the network element identifier linked with the identifier of the public land mobile network selected by the terminal equipment, wherein the terminal equipment is configured to transmit a message for Internet Protocol (IP)-based data transmission whose network access identifier (NAI) comprises the domain name of an authentication server of the selected public land mobile network as a realm section.

A computer program product operable on a processor of a mobile station, the computer program product comprising a computer program code portion for causing the mobile station to select a public land mobile network on the basis of a comparison of received public land mobile network identifiers and public land mobile network identifiers contained in the mobile station, and a computer program code portion for causing the mobile station to set up a connection via the local network to a network element defined by the network element identifier linked with the identifier of the selected public land mobile network, wherein the computer program product comprises a computer program code portion for causing the mobile station to transmit a message for Internet Protocol (IP)-based data transmission whose network access identifier (NAI) comprises the domain name of an authentication server of the selected public land mobile network as a realm section.

A method for a wireless terminal equipment configured to set up a data transmission connection at least with a wireless local network in a system further comprising at least one public land mobile network, the method comprising:

• receiving public land mobile network identifiers and network element identifiers linked therewith,
• selecting a public land mobile network by means of a comparison of said received public land mobile network identifiers and public land mobile network identifiers contained in the terminal equipment, and
• setting up an access via the local network to the network element determined by the network element identifier linked with the identifier of the selected public land mobile network, wherein the terminal equipment is configured to transmit a message for Internet Protocol (IP)-based data transmission whose network access identifier (NAI) comprises the domain name of an authentication server of the selected public land mobile network as a realm section.

An access controller for a wireless local network, wherein

• the access controller is configured to operate as a gateway in data transmission between an access point of the local area network and a public land mobile network;
• the access controller is configured to determine public land mobile network identifiers and network element identifiers linked with said public land mobile network identifiers, and
• the access controller is configured to transmit said public land mobile network identifiers and the network element identifiers linked therewith to the terminal equipment, wherein data transmission between the local network and the public land mobile network is based on the Internet Protocol (IP) and the access controller is configured to provide data transmission between the terminal equipment and the network element of the selected public land mobile network on the basis of messages whose network access identifiers (NAI) comprise the domain name of an authentication server of the selected public land mobile network as a realm section.

A method for providing system information for roaming in a telecommunications system comprising at least one wireless local network, at least one public land mobile network, and at least one wireless terminal equipment comprising means for setting up a data transmission connection at least with the local network, the method comprising:

• determining, in access controller for the wireless local network, public land mobile network identifiers and network element identifiers linked with said public land mobile network identifiers, and
• transmitting said public land mobile network identifiers and the network element identifiers linked therewith to the terminal equipment, wherein data transmission between the local network and the public land mobile network is based on the Internet Protocol (IP) and the access controller is configured to provide data transmission between the terminal equipment and the network element of the selected public land mobile network on the basis of messages whose network access identifiers (NAI) comprise the domain name of an authentication server of the selected public land mobile network as a realm section.