Abstract: Systems, apparatus, and methods for forwarding data packets towards a mobile node roaming in a foreign packet-switched data network are disclosed. The data packets having been addressed to a home address of the mobile node, the mobile node being provided with a care of address for use in the foreign network, the systems, apparatus, and methods comprise various features.

Abstract: A packet radio network comprising a gateway support node, a serving support node and a radio network controller provides a facility for communicating internet packets with mobile user equipment. The gateway support node provides a packet data protocol context for controlling communication of internet packets between the packet radio network and mobile user equipment via a packet communications bearer. The serving support node connected to the gateway support node controls communications between the gateway support node and mobile user equipment forming the packet communications bearer. The radio network part provides a radio access bearer for communicating internet packets via a radio access interface with mobile user equipment. In response to a request message, the serving support node with the gateway support node establishes a common packet data protocol context with a packet communications bearer to communicate packets.

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.

Abstract: A packet radio network comprising a gateway support node, a serving support node and a radio network part provides a facility for communicating internet packets with mobile user equipment. The gateway support node provides a packet data protocol context for controlling communication of internet packets between the packet radio network and mobile user equipment via a packet communications bearer. The serving support node is connected to the gateway support node controls communications between the gateway support node and mobile user equipment forming the packet communications bearer. The radio network part provides a radio access bearer for communicating internet packets via a radio access interface with mobile user equipment. In response to a request message, the serving support node with the gateway support node establishes a common packet data protocol context with a packet communications bearer to communicate packets according to an internet protocol version specified by the mobile user equipment.

Abstract: The invention relates to a method and apparatus for controlling one or more characteristics of a service received by a mobile station in a mobile communications network across a radio communications link with a dynamically varying bandwidth. Bandwidth-sensing data packets are created for the purpose of determining changes in the bandwidth available across the link and transmissions of bandwidth-sensing data packets across the link are monitored. If timing information generated from the monitored transmissions indicates a change in the bandwidth, then one or more characteristics of the service received can be altered.

Abstract: The present invention relates to apparatus for and methods of performing a binding procedure in respect of a mobile node in a foreign packet data network, the mobile node having roamed from a an home packet data network and having a home packet data protocol address, the method comprising the steps of: the mobile node sending its home packet data protocol address to a node of the network responsible for allocating packet data protocol address to mobile nodes for use in the foreign network (the allocating node); the allocating node allocating or participating in the allocation of a packet data protocol address to the mobile node; the allocating node receiving a packet data protocol address of a receiving node; and in dependence on the received home packet data protocol address, the receiving node packet data protocol address, and the allocated packet data protocol address, the allocating node sending or arranging for another network node to send a message to the receiving node, the message indicating a binding

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.

Abstract: According to the present invention there is provided a telecommunications system for providing a facility for communicating internet packet data in accordance with a first internet protocol (IPV6). The system comprises a user equipment, the user equipment including a first internet protocol stack operable in accordance with a first internet protocol (IPV6) and a second internet protocol stack operable in accordance with a second internet protocol (IPV4). The system includes a packet radio system (GPRS) network operable to communicate internet packet data in accordance with the second internet protocol (IPV4), and an inter-working. The inter-working unit is operable in association with the user equipment to represent internet packet data according to the first internet protocol (IPV6) as internet packet data according to the second internet protocol (IPV4) for communication via the packet radio system network (GPRS).

Abstract: A telecommunications system for communicating internet packets between a correspondent node and a mobile node. The system comprises a packet radio network providing packet data bearers for communicating internet packets with nodes. Each of the bearers is defined with respect to a source address of the internet packets, the packet radio network including a gateway support node (GGSN) to provide an interface between the external network and the packet radio network. The GGSN detects whether an internet packet is for providing a binding update to the correspondent node of a first source address of the mobile node to a care-of-address of the mobile node. If the internet packet is a binding update, the GGSN allows egress of internet packets sent from the correspondent node. By allowing egress of packets from the correspondent node having this care-of-address as the destination address, a measure of security is provided.

Abstract: A system for forwarding data packets towards a mobile node roaming in a foreign packet-switched data network, the data packets having been addressed to a home address of the mobile node, the mobile node being provided with a care of address for use in the foreign network, the system comprising: a mobile agent control entity arranged to receive a message indicating a binding between the home address and the care of address of the mobile node, and, in response to said message, to send a control message to control the operation of a mobile agent traffic bearer entity: and a mobile agent traffic bearer entity arranged to receive the control message from the mobile agent control entity and, in response, to provide a resource for forwarding the data packets towards the mobile node at the care of address.

Abstract: A telecommunications system communicates internet packet data, carrying payload data including a plurality of different data types, with a mobile communications user equipment. The system comprises a gateway support node (GGSN), a service support node (SGSN) and a radio network controller (RNC). At least one of the gateway support node (GGSN) and the user equipment (UE) are operable to: parse the payload data in each data packet; generate a radio access bearer sub-flow indicator indicating the number of different types of data in the payload and the number of symbols in each different data type; and form a transport frame including the sub-flow indicator.

Abstract: The present invention relates to apparatus for and methods of performing a binding procedure in respect of a mobile node in a foreign packet data network, the mobile node having roamed from a an home packet data network and having a home packet data protocol address, the method comprising the steps of: the mobile node sending its home packet data protocol address to a node of the network responsible for allocating packet data protocol addresses to mobile nodes for use in the foreign network (the allocating node); the allocating node allocating or participating in the allocation of a packet data protocol address to the mobile node; the allocating node receiving a packet data protocol address of a receiving node; and in dependence on the received home packet data protocol address, the receiving node packet data protocol address, and the allocated packet data protocol address, the allocating node sending or arranging for another network node to send a message to the receiving node, the message indicating a bindi

Abstract: An applications server is operable to provide a plurality of user driven services by running an application program. The application program is arranged to provide the services in response to user commands for selecting service options. The applications server comprises in accordance with the application program a state machine able to determine a current state of the application program from one of a pre-determined set of states defining a logical procedure through the user selected service options. The states of the state machine includes for each of the modular services, one or more states associated with one or more forms within the service. Each form defines a state of a user interface for providing the services to the user, and each state includes one or more sub-states called situations, defining the commands to be recognised and the predicates to be satisfied to select that state depending upon the estimated user commands and the session state of the user session.

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 data packet to a destination packet data protocol address of a correspondent 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 correspondent node, wherein the data packet is sent from a mobile node of a second packet-switched data network external to the first network, and wherein the mobile node has been in a communication session with the correspondent node while provided service in a third packet-switched data network different to the second network.

Abstract: A data processing apparatus for inputting data by writing characters on a touch sensitive display screen. The data processing apparatus comprises a character recognition processor operable to generate an estimate of a character hand written by a user on the touch sensitive screen. The data processing apparatus includes a processing unit operable to receive the estimated character, and a graphics display device operable to receive the estimated character from the processing unit. The graphics display device is operable to display the estimated characters within a text input window of the display screen. The processing unit is operable in combination with the graphics display driver to display the estimated character on the display screen, substantially at a position proximate to a location to where the user has written the character.

Abstract: A telecommunications system communicates internet packet data, carrying a plurality of different types of data, to and/or from a mobile communications user equipment. The system comprises a gateway support node (GGSN), a serving support node (SGSN) and a radio network controller (RNC). The mobile user equipment (UE) is operable to communicate a context application request to the serving support node (SGSN) specifying main quality of service parameters and at least one other data field representing a request for a different set of quality of service parameters, each of the quality of service parameters being provided for one of the different types of data in the data packet.

Abstract: A method of customizing a mobile station in a mobile telecommunications system. A portable authentication module is provided for insertion into the mobile station, the authentication module comprising a function for authenticating a subscriber in the mobile telecommunications system when the authentication module is inserted in the mobile station. The authentication module further includes one or more software applications for customizing the mobile station. The one or more customizing software applications are transferred onto the mobile station in response to insertion of the authentication module into the mobile station, and then activated, in order to customize the mobile station.

Abstract: A method of identifying areas for improving radio communications coverage in a mobile radio network under analysis. The method comprises detecting cancel location signalling data, update location signalling data and service signalling data. The cancel location signalling data is generated to cancel a registration of mobile user equipment from a visitor subscriber database of the analyzed mobile radio network. The cancel location signalling data includes mobile subscriber identifiers of the mobile user equipment. The location update signalling data informs the home subscriber database of the home network of the mobile user equipment that the mobile user equipment is to be registered as having roamed to a visitor subscriber database of at least one other mobile network. The location update signalling data includes identifiers of the visitor subscriber database and the mobile subscriber identifier of the user equipment being registered.

Abstract: A telecommunications system provides a facility for communicating a Short Message Service (SMS) message to a mobile user equipment using a subscriber identity number when the mobile user equipment is communicating via an Internet Protocol network using an Internet Protocol (IP) communication being terminated on the IP network. The system comprises an SMS network including a Short Message Service Centre (SM-SC), a gateway mobile switching centre (GMSC), the SMS network providing a facility for communicating SMS messages, and an Internet Protocol/SMS (IP/SMS) gateway for communicating between the SMS network and the IP network. The system also includes a home location database for maintaining address data identifying a current location of a mobile user equipment. The gateway mobile switching centre is operable in response to the SMS message to interrogate the home location database for an address to which the SMS message should be sent.

Abstract: A data processing apparatus for inputting data by writing characters on a touch sensitive display screen. The data processing apparatus comprises a character recognition processor operable to generate an estimate of a character hand written by a user on the touch sensitive screen. The data processing apparatus includes a processing unit operable to receive the estimated character, and a graphics display device operable to receive the estimated character from the processing unit. The graphics display device is operable to display the estimated characters within a text input window of the display screen. The processing unit is operable in combination with the graphics display driver to display the estimated character on the display screen, substantially at a position proximate to a location to where the user has written the character.