Various communication systems may benefit from optimized transmissions. A method can include receiving data to be forwarded to a first wireless device. The method can also incude determining the data as delay tolerant data. Moreover, the method can include defining a role of at least one second wireless device for forwarding the delay tolerant data. Also, the method can include transmitting the delay tolerant data to the second wireless device to be forwarded to the first wireless device.

This application discloses a nomadic data access system and provides a new communication system and relevant devices to lower the complexity of the system. The system includes a core network and an NDA NodeB, wherein an NDA part in the core network is configured to establish a communication interface with the NDA NodeB, to establish a communication link for an NDA user equipment through the NDA NodeB and to transmit an NDA user data service to a 3GPP part in the core network; and the NDA NodeB is configured to establish the communication interface with the NDA part in the core network, to establish for the NDA user equipment the communication link with the NDA part in the core network and to transmit the NDA user data service, or to establish a communication link with a local area or wide area Internet and to transmit the NDA user data service to the local area or wide area Internet. This application further discloses devices in the system and relevant cell access and switching methods.

A telecommunications system operable to provide a facility for mobile communications to a mobile device. The system comprises a core network, an access control function and a plurality of radio access networks. Each radio access network is operable to communicate data to and from the mobile device in accordance with one of a plurality of radio access technologies. In response to an attach request from the mobile device requesting a connection with the core network via a chosen radio access technology, the core network is operable to establish a connection with the mobile device via at least one of the plurality of radio access interfaces for communicating data to and from the mobile device. An access control function is operable to identify the mobile device requesting the connection with the core network and in accordance with access control criteria generate an attach response indicating with which if any of the plurality of radio access technologies the mobile device may establish the connection and communicate the attach response to the radio access network via which the mobile device has requested the connection.

A method for selecting and establishing a direct interface is provided. The method includes: when a target network element accesses a network element of a core network (CN) via a target gateway, a source side or a target side selects to establish a direct interface with the target gateway and/or the target network element. A system for selecting and establishing a direct interface is also provided. The system includes a selection and establishment unit for, when the target network element accesses the network element of the CN via the target gateway, selecting to establish the direct interface with the target gateway and/or the target network element by the source side or the target side. Use of the method and system in the present invention can realize establishment of an optional direct interface, so that a plurality of direct interface schemes can be selected.

In general, a mobile virtual private network (VPN) is described in which service provider networks cooperate to dynamically extend a virtual routing area of a home service provider network to the edge of a visited service provider network and thereby enable IP address continuity for a roaming wireless device. In one example, a home service provider network allocates an IP address to a wireless device and establishes a mobile VPN. The home service provider network dynamically provisions a visited service provider network with the mobile VPN, when the wireless device attaches to an access network served by the visited service provider network, to enable the wireless device to exchange network traffic with the visited service provider network using the IP address allocated by the home service provider network.

A system and method, in a mobile communication device, providing N-way communication through a plurality of communication services. Various aspects of the present invention provide a mobile communication device comprising a user interface and at least one communication interface module adapted to perform a first communication with a first communication device through a first communication service and perform a second communication with a second communication device through a second communication service. At least one module may be adapted to receive outgoing information from the user interface and to receive first information from the first communication device through the first communication service. The at least one module may also combine at least the received outgoing information and the received first information and transmit such combined information to the second communication device through the second communication service.