Abstract: A telecommunications system for communicating internet packet data in accordance with a first internet protocol (IPV6) via a packet radio network operable in accordance a second internet protocol (IPV4) includes a user equipment operable to request a bearer for communicating internet protocol data according to the second internet protocol (IPV4) to and from a gateway support node of the packet radio network. The gateway support node is operable to establish a tunnelling protocol bearer for communicating the internet packet data to and from the user equipment across the packet radio network. The user equipment is operable in combination with the gateway support node to form an address which is compatible with the first internet protocol (IPv6). The address includes an interface identifier having a tunnel end identifier of the tunnelling protocol bearer which ends at the gateway support node of the packet radio network.

Abstract: A telecommunications system for communicating internet packet data in accordance with a first internet protocol (IPV6) via a packet radio network operable in accordance a second internet protocol (IPV4). The system comprises a user equipment operable to request a bearer for communicating internet protocol data according to the second internet protocol (IPV4) to and from a gateway support node of the packet radio network. The gateway support node is operable to establish a tunnelling protocol bearer for communicating the internet packet data to and from the user equipment across the packet radio network. The user equipment is operable in combination with the gateway support node to form an address which is compatible with the first internet protocol (IPv6). The address includes an interface identifier having a tunnel end identifier of the tunnelling protocol bearer which ends at the gateway support node of the packet radio network.

Abstract: An internet packet comprises a header field including a field identifying a source address of the internet packet, a field identifying the destination address of the internet packet and a next header field identifying whether an extension header follows the header and a type of the extension header. The extension header indicates a hop-by-hop option header including a router alert option header type indicating that the extension field is optional for a router to read, and a field providing information for a gateway support node of a packet radio system network. A gateway support node is provided with information, which may be required for example to support a mobile internet protocol (IP). By providing the router alert option field, a router is not required to read the remainder of the hop-by-hop option field.

Abstract: Apparatus for and methods of enabling a gateway node of a first packet-switched data network to select a first channel for transferring a tunnelled data packet to a destination packet data protocol address of a mobile node provided service in the first network are disclosed. The gateway node is configured to select the first channel from a plurality of channels configured to transfer data packets to the destination packet data protocol address of the mobile node, and the selection is performed by matching a packet data protocol address, associated with a data packet received by the gateway node, to one or more data packet filters associated with the plurality of channels.