Abstract: A method of connecting a mobile station to a communications network is provided, and includes performing an authentication of the mobile station at the network. A secure identifier, generated at the mobile station, is received at a gateway node and at an access node from an authentication node of the network if it is determined by the authentication that the mobile station is a subscriber to the network. A first secure communications tunnel is established from the access node to the mobile station using a value of the secure identifier and a second secure communications tunnel is established from the access node to the gateway node of the network using the value of the secure identifier. The first and second communications tunnels are bound together to form a communications path between the mobile station and the network.

Abstract: The invention describes a method for transmission of a DHCP message between a telecommunication network, especially a telecommunication network according to the WiMAX-standard, and an Internet Protocol (IP) subscriber (SS/MS; MN) to the telecommunication network. Therein, an information secured with an encryption key is added to the DHCP message. The encryption key is derived from a basic key being provided by a network component of the telecommunication network.

Abstract: A mobile station is designed, as a gateway for one or several mobile terminals, to establish a connection between the mobile terminal(s) and an access network. The mobile station supports a network-based mobility management such that the mobile station acts as a client instead of the mobile terminals during communication with a home agent of a home network or intermediate network connected to the access network in the framework of a mobile IP connection.

Abstract: The invention describes a method for transmission of a DHCP message between a telecommunication network, especially a telecommunication network according to the WiMAX-standard, and an Internet Protocol (IP) subscriber (SS/MS; MN) to the telecommunication network. Therein, an information secured with an encryption key is added to the DHCP message. The encryption key is derived from a basic key being provided by a network component of the telecommunication network.

Abstract: Information is transmitted in a communication system having at least two communicating devices using a link between the at least two communicating devices provided at least via a radio communication interface of a radio communication system having a number of base stations that are interlinked via a base station network. The link is realized using channels arranged in hierarchical protocol layers. Channel-specific information is given to a hierarchical higher channel at least from one channel for the radio link between a communicating device and at least one base station. This hierarchically higher channel is an Internet protocol-based channel for the overall link between the at least two communicating devices.

Abstract: A mobile station is designed, as a gateway for one or several mobile terminals, to establish a connection between the mobile terminal(s) and an access network. The mobile station supports a network-based mobility management such that the mobile station acts as a client instead of the mobile terminals during communication with a home agent of a home network or intermediate network connected to the access network in the framework of a mobile IP connection.

Abstract: A method and a device divert messages of a terminal, in particular, a mobile terminal from a first network provider connected to an access network by a gateway node of a second network provider. Network access identifiers are provided in the exchanged messages, made up of a character string for identifying the terminal and a character string for addressing a server of the network provider. The network access identifier is reformatted in the method such that the messages are not firstly transmitted to the server of the first network provider but rather to the server of the second network provider. After analysis of the data contained in the messages, the messages are then forwarded to the server of the first network provider after reverse formatting of the network access identifier.

Abstract: A first network is structured according to a first technology, especially a data network, comprising one or several network devices and/or interfaces, which are configured to establish communication with at least one station using the first technology and have basic functions for autonomous operation of the first network. In order to be able to collect subscriber-related data from a data source outside the network, especially a second network structured according to a second technology, more particularly a cellular mobile telephone network, when a subscriber who is not registered in the first network is connected, one of the two networks generically enables logical functions of components of the other network. A network facility enables the implementation of the above-mentioned method.

Abstract: A user terminal is switched between a cellular network and a worldwide interoperability for microwave access radio network within a telecommunication system. An authentication, authorization and accounting (AAA) server which is designed for use with both of these networks is disposed in the telecommunication system in such a way that user data of the user terminal stored in the AAA server can be accessed from both of these networks, thereby advantageously ensuring uninterrupted switching between the two networks free of loss.

Abstract: After a radio link is established between a mobile subscriber terminal and an access network, to authenticate the subscriber an authentication proxy server of an intermediate network forwards at least one authentication message containing a subscriber identification between the access network and a home network of the subscriber. If authentication is given by an authentication server of the home network, the authentication proxy server of the intermediate network stores the subscriber identification. The home agent receives a registration request message originating from the subscriber terminal and containing a subscriber identification; the home agent transmits a key request message, containing the subscriber identification, for a mobile key to the relevant authentication proxy server.

Abstract: A method for connection of at least one station to a data network. In a first data network based on a first technology, the data network comprises one or more network devices and/or interfaces to establish communication with at least one station of the first technology, and with base functions for an autonomous operation of the first network. According to an aspect of the invention, a station with a non-network technology may be connected to a data network via a method for the connection of the station using a logical point-to-point connection. The data network comprises network devices for the transmission of data in a communications connection, and an access device with an interface for the establishment of a communication connection with at least one station.

Abstract: Information is transmitted in a communication system having at least two communicating devices using a link between the at least two communicating devices provided at least via a radio communication interface of a radio communication system having a number of base stations that are interlinked via a base station network. The link is realized using channels arranged in hierarchical protocol layers. Channel-specific information is given to a hierarchical higher channel at least from one channel for the radio link between a communicating device and at least one base station. This hierarchically higher channel is an Internet protocol-based channel for the overall link between the at least two communicating devices.

Abstract: The invention relates to a method in a first network based on a first technology network, particularly data network ((W-)LAN), comprising one or more network devices and/or interfaces (hub, bridge, V, VL), implemented for setting up a communication with at least one station (W-H; H; MS) of the first technology, and comprising basic functions (AAA, DHCP, DNS) for autonomous operation of the first network.

Abstract: The invention relates to a method and a communications system for providing geographic data during the retrieval of information from a packet-oriented communications system. The aim of the invention is to enable information which has a geographic location reference to be requested from a network server by a data terminal (1), e.g. a WAP-enabled mobile station, via a radio communication link (V), using an information request (2). In order to provide geographic data during the retrieval of information in a simple and anonymous manner, the request for information is routed via an interfacing proxy-server (5) which supplements the information request (2) with geographic information (7).

Abstract: A video decoder including a control unit (CC), a picture memory (P) and a loop filter (F) for blockwise decoding of coded video pictures (q). The blockwise decoding generally leads to artefacts in the display of the decoded video pictures on a monitor (M), which artefacts can be substantially suppressed by filters arranged downstream of the decoder. A similarly substantial suppression of the artefacts with a small extension of the number of components is characterized by means with which the control unit (CC) is enabled, in the decoding intervals,(a) to read predetermined pixel data of a decoded video picture from the picture memory (P) and to apply them to the loop filter (F) for the purpose of filtering,(b) to select the predetermined pixel data in such a way that the filtering operation is performed beyond the block edges of the blocks provided for decoding. The measures described are compatible with a decoder as defined in the H.261 Recommendation.

Abstract: In a system for checking the access to data of a data unit (T10, T20, T30), the data unit is connected to a public network (V2) and is capable of exchanging data with a second subscriber (T4) over this network. In order that an authorized subscriber has access to the data of the data unit even without a secret telephone number, an adapter (T15, T25, T35) is allocated to the data unit (T10, T20, T30), which adapter can be dialled over a secured network (V1). The adapter (T15, T25, T35) is arranged in such a way that, in response to being dialled over the secured network (V1), the adapter causes the data unit (T10, T20, T30) to dial the second subscriber (T4) whose telephone number is stored in a memory (T11, T21, T31) allocated to data unit.

Abstract: The described memory is intended for video signals whose picture information is partitioned into fields and in which the information of the fields is arranged in lines. Separate field information components may be absent in the video signals to be stored. When fields are read from this store, they should be separated from one another by a vertical blanking interval. To avoid an elaborate write-read control for the memory and to simultaneously provide the possibility of connecting an interpolation circuit (IP) to it, with which the proximity values for the omitted fields are gained, a series arrangement of three shift registers (SR1, l SR2, SR3) is provided. A counter (ZW) generates and counts the shift pulses for the shift registers (SR1, SR2, SR3). Either the data of an incoming field (E1) or the data (E3) of the field stored in the third shift register (SR3) are applied to the first shift register (SR1) via a first controllable switch (U1).

Abstract: The described control signal generator for processing a video signal is characterized by an addressable memory (PR1) whose addresses are associated with equally long time intervals of a video picture. The binary coded amplitude is stored at an address of the memory (PR1), which amplitude is to be assumed by the control signal (SS) generated by the control signal generator in the associated time interval. A counting unit (Z) which is clocked by a counter clock pulse (T) successively generates the addresses corresponding to consecutive time intervals of a video picture and being applied to the address inputs of the addressable memory (PR1). The frequency of the counter clock pulse (T) is chosen to be such that all addresses associated with a video picture are traversed during the time length of a video picture.

Abstract: A circuit arrangement for evaluating a video synchronizing signal formed by line synchronizing pulses whose regular sequence between two fields is interrupted by a field synchronizing pulse and the time interval between the edges of a field synchronizing signal and the edges of a subsequent first line synchronizing pulse is characteristic of each field. In the circuit arrangement the evaluation of the video synchronizing signal is based on a field synchronizing pulse and the line synchronizing pulses subsequent thereto. This evaluation is effected by a detector, which detects the field synchronizing pulses in the video synchronizing signal.