The validity of sensor data of an Ethernet onboard network in a motor vehicle is checked by: determining a delay time of a first signal on a first connecting path between a first control unit of the Ethernet onboard network and a second control unit of the Ethernet onboard network; determining a maximum speed of the first connecting path on the basis of the delay time; and determining a type of a transmission medium of the first connecting path on the basis of the maximum speed. The following steps are also carried out: identifying at least a first control unit of the Ethernet onboard network, synchronizing at least a first control unit of the Ethernet onboard network, ascertaining the synchronization interval, ascertaining a drift of a timer of the first control unit, ascertaining a timestamp of the first control unit, reading a timestamp of the first control unit.

An attack communication detection device that is robust against a deviation from the design value of a communication interval is provided. The attack communication detection device is an attack communication detection device that detects an attack communication from a communication of each electronic control unit in a communication network and includes: a receiving unit that receives communication data for detection which may or may not include an attack communication; a sum-of-communication-intervals calculation unit that calculates the sum of communication intervals, which is the sum of two adjacent communication intervals, of the communication data for detection; an estimated distribution model storage that stores in advance an estimated distribution model of a communication interval and the sum of communication intervals of communication data for learning which does not include an attack communication; and a detection unit that detects whether or not the communication data for detection includes an attack communication based on the estimated distribution model and the sum of communication intervals of the communication data for detection.

An attack communication detection device that is robust against a deviation from the design value of a communication interval is provided. The attack communication detection device is an attack communication detection device that detects an attack communication from a communication of each electronic control unit in a communication network and includes: a receiving unit that receives communication data for detection which may or may not include an attack communication; a sum-of-communication-intervals calculation unit that calculates the sum of communication intervals, which is the sum of two adjacent communication intervals, of the communication data for detection; an estimated distribution model storage that stores in advance an estimated distribution model of a communication interval and the sum of communication intervals of communication data for learning which does not include an attack communication; and a detection unit that detects whether or not the communication data for detection includes an attack communication based on the estimated distribution model and the sum of communication intervals of the communication data for detection.

The disclosure relates to a controller area network, CAN, unit and associated method and computer program. The CAN unit is configured to detect a transmit signal edge on a transmit signal for a CAN transceiver; detect a corresponding receive signal edge on a receive signal for a CAN controller of the CAN transceiver; and detect a collision on the CAN bus based on a propagation delay between the transmit signal edge and the corresponding receive signal edge.

In a network in which devices are classified into a plurality of layers, a physical first line is connected to an outdoor unit and a first indoor unit, which are first-layer devices, and a physical second line is connected to a second indoor unit, which is a second-layer device. A first intermediary unit, which is a first intermediary device, includes a first filter always connected to the first line and the second line. The first intermediary unit communicates with the outdoor unit and the second indoor unit via a first signal. The first filter is installed so as not to attenuate a high-frequency first signal used for communication among the outdoor unit, the first indoor unit, the first intermediary unit, and the second indoor unit and so as to attenuate a low-frequency second signal used for communication between the first intermediary unit and the second indoor unit.

A transceiver device for a bus system. The transceiver device includes a first bus terminal for connection to a first signal line of the bus system, a second bus terminal for connection to a second signal line of the bus system, and a receiving unit for receiving a bus receive signal from the first and second bus terminals. The transceiver device is designed to interconnect the first and second bus terminals via a predefinable electrical resistance for a predefinable first period of time. The predefinable first period of time is selectable as a function of at least one parameter of the receiving unit.

A system includes a host processor, which has a host memory and is coupled to store data in a non-volatile memory in accordance with a storage protocol. A network interface controller (NIC) receives data packets conveyed over a packet communication network from peer computers containing, in payloads of the data packets, data records that encode data in accordance with the storage protocol for storage in the non-volatile memory. The NIC processes the data records in the data packets that are received in order in each flow from a peer computer and extracts and writes the data to the host memory, and when a data packet arrives out of order, writes the data packet to the host memory without extracting the data and processes the data packets in the flow so as to recover context information for use in processing the data records in subsequent data packets in the flow.

An in-vehicle communication device on a transmitting side of a message includes: a delay time measuring unit measuring a delay time from when transmission of a message is first attempted to when the transmission of the message is started; and an assigning unit assigning the delay time measured by the delay time measuring unit to the message. An in-vehicle communication device on a receiving side of a message includes: a reception point acquisition unit acquiring a point in time when a message from the in-vehicle communication device on the transmitting side is received; a delay time acquisition unit acquiring a delay time assigned to the received message; and a calculation unit calculating a transmission cycle of each message based on a point in time acquired by the reception point acquisition unit and a delay time acquired by the delay time acquisition unit for each of two received messages.

In some examples, an apparatus for processing a composite signal transmitted uses a first communication protocol via a first port comprising a first connector type, in which the apparatus comprises a processor configured to execute one or more instructions stored in a memory of the apparatus, whereby to cause the apparatus to isolate multiple components of the composite signal received at a first port of the apparatus, the first port of the apparatus, whereby to generate a first and second set of signal components, process at least one component from the second set of signal components to generate a converted signal component, transmit the first set of signal components and the converted signal component from a second port of the apparatus using a second communication protocol, and receive a power supply signal over the second port of the apparatus.

Systems and methods for setting a carrier-sensing mechanism in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used—one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets the carrier-sensing mechanism based on the preamble detection.