Abstract: A device and method for operating a communications network in a vehicle, or for operating an industrial communications network; a control entity for the communications network, in particular, a software-defined networking controller, determining a countermeasure after detection of an attack; an infrastructure component being configured as a function of the countermeasure, in particular, by setting at least one filtering, blocking or forwarding rule; and at least one data stream from or to at least one other infrastructure component being isolated by the infrastructure component, in a portion of the communications network; or at least one data stream to or from an end node being isolated by the infrastructure component, in a portion of the communications network.

Abstract: A device and method for operating a communications network in a vehicle, or for operating an industrial communications network; a control entity for the communications network, in particular, a software-defined networking controller, determining a countermeasure after detection of an attack; an infrastructure component being configured as a function of the countermeasure, in particular, by setting at least one filtering, blocking or forwarding rule; and at least one data stream from or to at least one other infrastructure component being isolated by the infrastructure component, in a portion of the communications network; or at least one data stream to or from an end node being isolated by the infrastructure component, in a portion of the communications network.

Abstract: A method for generating a shared key between two users of a network. The two users respectively have at least one clock as well as an arrangement for detecting a certain surroundings variable. The two users detect the certain surroundings variable synchronously at respectively predefined points in time or start a detection of a course of the surroundings variable. Finally, the two users respectively generate the shared key taking values detected in this manner for the surroundings variable into account.

Abstract: A method for generating a shared key between two users of a network. The two users respectively have at least one clock as well as an arrangement for detecting a certain surroundings variable. The two users detect the certain surroundings variable synchronously at respectively predefined points in time or start a detection of a course of the surroundings variable. Finally, the two users respectively generate the shared key taking values detected in this manner for the surroundings variable into account.

Abstract: A method for synchronizing two communication networks of an electronic data-processing system, each of the networks including one or more respective nodes, may include establishing for each of the networks a respective time schedule that establishes at least one respective time slot for a respective synchronization message. The synchronization message time slots are established to coincide. The synchronization message of the first communication network is generated by one of the nodes of the first communication network. The synchronization message of the second communication network is generated as a function of the synchronization message of the first communication network.

Abstract: A method for synchronizing two communication networks of an electronic data-processing system. One or a plurality of nodes is connected to the two communication networks in each case. Each of the two communication networks has a schedule, which specifies at least one time slot for a synchronization message. One of the nodes of the first communication network, and one of the nodes of the second communication network are linked to one another by a shared arithmetic unit. A deviation between the time slots for the synchronization messages on the two communication networks is determined as a function of the schedules of the two communication networks. The deviation is used to determine correction values, which are forwarded to at least one other node. The occurrence of the time slots for the synchronization messages is modified by the other node as a function of the correction values.

Abstract: A method for diagnosing a synchronization of two communications networks of an electronic data-processing system, each communications network including at least one node and having a respective schedule that specifies at least one respective time slot for a respective synchronization message, may include detecting, by each of the two communications networks, an individual time-based variable, comparing the two detected time-based variables to each other, and determining a quality of the synchronization of the two communications networks based on the comparison.

Abstract: A method for synchronizing two communication networks of an electronic data-processing system, each of the networks including one or more respective nodes, may include establishing for each of the networks a respective time schedule that establishes at least one respective time slot for a respective synchronization message. The synchronization message time slots are established to coincide. The synchronization message of the first communication network is generated by one of the nodes of the first communication network. The synchronization message of the second communication network is generated as a function of the synchronization message of the first communication network.

Abstract: The invention refers to a method for monitoring a communication media access schedule of a communication controller (5) of a communication system (1) by means of a bus guardian (6). The communication system (1) comprises a communication media (2) and nodes (3) connected to the communication media (2). Each node (3) comprises a communication controller (5) and a bus guardian (6) assigned to the communication controller (5). Messages are transmitted among the nodes (3) across the communication media (2) based on a cyclic time triggered communication media access scheme.

Abstract: A method and a bit stream decoding unit for bit stream decoding has a bit stream comprising a number of consecutive samples. In order to provide for rapid and, in particular, reliable decoding of the bit stream, a detection window comprising a number of samples is defined and the detection window is positioned at certain positions on the bit stream in order to comprise certain samples with respective sample values. A majority voting is applied to the sample values in the detection window and, in dependence on the result of the majority voting, the bit stream is decoded and respective bit values are generated.

Abstract: The invention refers to one of a number of nodes of a communication system. The nodes are connected to a communication media for transmitting data among the nodes. Said one node comprises a communication controller, across which the node is connected to the communication media, and a bus guardian for controlling access of the communication controller to the communication media. In order to provide a cheap but nevertheless reliable way for monitoring the synchronized clock signal of a node of a communication system and in particular for detecting deviations of the synchronized clock signal it is suggested that a synchronized clock signal from the communication controller is made available to the bus guardian, and that the bus guardian comprises means for monitoring the synchronized clock signal using a bus guardian internal clock signal, which is generated by means of an electronic circuit and which is less accurate than the synchronized clock signal to be monitored.

Abstract: A method and a bit stream decoding unit for bit stream decoding has a bit stream comprising a number of consecutive samples. In order to provide for rapid and, in particular, reliable decoding of the bit stream, a detection window comprising a number of samples is defined and the detection window is positioned at certain positions on the bit stream in order to comprise certain samples with respective sample values. A majority voting is applied to the sample values in the detection window and, in dependence on the result of the majority voting, the bit stream is decoded and respective bit values are generated.

Abstract: Method for transmitting data within a communication system, the communication system comprising a communication media and a number of nodes connected to the communication media, the data being transmitted across the communication media within a communication cycle comprising a number of time slots assigned to one or more nodes of the communication system. In order to provide a possibility for a data transmission within communication cycles, which can satisfy the demands in communication systems for safety critical applications, too, it is suggested, that the communication cycle is initiated by an external event. The external event can be caused by manually setting a bit by a host, by a configurable timer in a controller host interface (CHI) or by an external trigger.

Abstract: The invention refers to a method for monitoring a communication media access schedule of a communication controller (5) of a communication system (1) by means of a bus guardian (6). The communication system (1) comprises a communication media (2) and nodes (3) connected to the communication media (2). Each node (3) comprises a communication controller (5) and a bus guardian (6) assigned to the communication controller (5). Messages are transmitted among the nodes (3) across the communication media (2) based on a cyclic time triggered communication media access scheme.