A relay device transmits a frame received from any of a plurality of external devices that are connected via a plurality of communication lines. The external device is connected to one of the communication lines and to another one of the communication lines by searching a relay information table for specifying a relay destination of the frame. In the relay information table, information for identifying a frame type is stored in association with relay destination identifying information for identifying a communication line serving as a relay destination of a frame. The relay information table is partitioned into a plurality of sub-tables in accordance with priority based on the type identifying information or the relay destination identifying information. The relay device searches the sub-tables in descending order of priority using the type identifying information contained in the frame received from the external device as a search key specifying the relay destination.

A communication master device (101) manages a plurality of communication slave devices (102). An investigation unit (301) investigates status of retention of transmission waiting data in the plurality of communication slave devices (102). A period specification unit (302) specifies a length of a transmission permitted period in which transmission of the transmission waiting data is permitted and a length of a transmission prohibited period in which the transmission of the transmission waiting data is prohibited, based on the status of the retention of the transmission waiting data in the plurality of communication slave devices (102).

An operation method of a first end node in a vehicle network supporting a PLCA function is provided. The method includes performing a monitoring operation in a first time interval configured for communication of the first end node and detecting a transmission request signal transmitted from a second end node by the monitoring operation. In response to detecting the transmission request signal, a transmission operation of the first end node in the first time interval is stopped. The first time interval is used for communication of a second end node instead of the first end node.

Provided is an in-vehicle gateway device which is capable of performing efficient path selection control when data is transferred to a different network. In an in-vehicle gateway device that performs transfer control of data between a first network and a second network, the second network has a different network form from the first network, and a virtual IP address is allocated to the second network.

A system for data transmission in a motor vehicle includes a central control unit, a first zonal control module, and a first LIN bus. The central control unit includes at least a first LIN master and a second LIN master. The first zonal control module is operably coupled to the central control unit via a first data connection. The first LIN bus is operably coupled to the first zonal control module. A first LIN slave connected to the LIN bus is assigned to the first LIN master, and a second LIN slave connected to the LIN bus is assigned to the second LIN master.

Method for configuring a functionality of real and/or simulated control units, comprising a functionality belonging to a functionality class, such that the functionality has one or more functions and parameters dependent on the functionality class. The functionality is further assigned to at least one control unit. The functionality class has categories, including an else category and a default category and its functionalities each belong to a category. A predetermined value is stored for parameter and if the functionality is assigned to the default category, the predetermined value is adopted for the parameter. If the predetermined value of the parameter changes, the change is adopted for all functionalities which have already been assigned to the default category. And the control unit assigned to the functionality is configured with the function and the values of the parameters of the functionality.

In an anti-fraud control system, a first error monitoring device includes a first frame transmitting and receiving unit that receives a frame flowing on the on-board network; and a first error detector that causes transmission of an error notification frame for notifying of an occurrence of an error in the frame when detecting the occurrence of the error in the frame received by the first frame transmitting and receiving unit. Each of second error monitoring devices includes: a second frame transmitting and receiving unit that receives the error notification frame; and a second error detector that regards, as a frame to be invalidated, the frame subjected to the error and included in the received error notification frame, and shifts the second error monitoring device to an invalidation mode for invalidating reception of subsequent frames, if no error is detected in an own branch with respect to the frame.

The disclosure relates to a motor vehicle with a vehicle internal data network through which control devices of the motor vehicle are coupled with each other for exchanging messages. The invention provides that the data network is subdivided into a plurality of security zones, within each of which at least one of the control devices is arranged, and domain controllers are provided, each separating at least two of the security zones and adapted to transmit at least one of the messages between at least two of the security zones separate from it if the message meets a predetermined safety criterion and to block the transmission of the message if the safety criterion is violated.

Method for operating a monitoring apparatus of a data network in a motor vehicle, and monitoring apparatus, control device and motor vehicle

The invention relates to a method for operating a monitoring apparatus (23) of a data network (11) in a motor vehicle (10), wherein the monitoring apparatus (23) receives a data message (19) comprising at least one electrical signal (20, 21) from the data network (11) at a network connection (12). The invention provides for the monitoring apparatus (23) to determine at least one level value of a respective signal level of the at least one electrical signal (20, 21) in a predetermined message section of the message (19) and to generate a test value on the basis of the at least one level value and to determine, for the data message (19), an item of sender information indicating an alleged sender device of the data message (19) and to determine a reference value on the basis of the sender information, and to generate a warning signal (28) if a difference between the test value and the reference value is greater, in terms of absolute value, than a predetermined threshold value. The signal level of the electrical signal is attenuated or generally changed by the impedance which results for the line section connecting the sender device and the monitoring apparatus (23). Use is made of the fact that characteristic attenuations on the lines between the individual control devices (ECUs), which are largely fixed and therefore deterministic in static networks, apply in a network. The monitoring apparatus therefore provides a method and an apparatus in which amplitudes or amplitude differences of bus signals from a transmitting station ECU X (14, 15, 16) are captured in a network at a receiving station ECU M (13), are compared with an expected amplitude or amplitude difference and are used to detect an anomaly. This makes it difficult for a sender device to conceal an incorrect item of sender information.

Systems and methods for implementing FlexRay communications between FlexRay nodes using Ethernet are provided. An Ethernet switch includes ports, each of which receives an Ethernet data packet from a respective FlexRay node. Each Ethernet data packet includes a FlexRay message, which includes at least one of a data frame and a frame identification. The Ethernet switch also includes a controller module that is configured to route the Ethernet data packets to their respective destinations.