A transceiver device for a bus system. The transceiver device includes first and second bus terminals for connection to first and second signal line of the bus system, and a transmitting unit for outputting a bus transmission signal to the first and second bus terminals. The transceiver device includes an input connection for receiving a transmission input signal useable for controlling an operating state of the transmitting unit, and a detection device, which to detect the presence of a first predefinable condition and, if the first predefinable condition is present, to interconnect the first and second bus terminals via a predefinable electrical resistance for a predefinable first period of time.

An anomaly detection device for detecting anomaly in frames flowing through an in-vehicle network system includes: an obtainer that obtains one or more frames; a first holder holding a first rule defining a rule indicating that when a frame satisfies a first condition based on a source or a destination, the frame is to be transferred; a first frame controller that transfers the one or more frames in accordance with the first rule; a second holder holding a second rule defining a rule indicating that a frame satisfying a second condition is to be determined as being anomalous; and a second frame controller that performs, in accordance with the second rule, an anomaly detection process on each of the one or more frames transferred by the first frame controller. When an anomalous frame is detected, the second frame controller provides or stores a detection result.

To locate an intermittent fault in a communication structure of an aircraft comprising pieces of equipment that are interconnected by cabling forming a plurality of communication media that are shared, an analyzer retrieves an error report relating to transmission errors observed on each of said communication media, performs a count of the transmission errors, per type of error and per communication chain, computes a median of the counts for communication chains comprising the same pair of wired pieces of equipment, and when, for a communication chain, the count exceeds a threshold equal to the median plus a predefined margin, generates an alarm indicating detection of an intermittent fault in association with the communication chain that led the threshold to be exceeded. Thus, intermittent faults are easily located and repaired.

Methods, systems, and apparatus for a threat detection system. The threat detection system includes a threat forensics platform. The threat forensics platform includes a memory. The memory is configured to store a baseline model of controller area network (CAN) data. The threat forensics platform includes a processor coupled to the memory. The processor is configured to obtain CAN data including multiple messages. The processor is configured to compare the CAN data including the multiple messages with the baseline model. The processor is configured to determine a threat score for the CAN data based on the comparison and determine that there is a threat within the CAN data based on the threat score. The processor is configured to provide an indication that there is the threat to a driver of a vehicle or to a service provider.

Methods and systems of enabling a non-interfering mode in a telematics device are provided. In one aspect, a method includes receiving a co-presence policy from a telematics server, receiving asset data from the asset, determining a presence of a second device on the asset communications bus based on the co-presence policy, and activating a non-interfering mode of operation based on determining the presence of the second device and on the co-presence policy. The method may be used to prevent interference between a telematics device and a diagnostic tool connected to the same vehicle communications bus. Advantageously, tasks such as reading diagnostic trouble codes and firmware updates are not disrupted.

A transmitting/receiving device for a bus system and a method for reducing an oscillation tendency in the case of coupled-in interferences, in particular, in the transition between different bus states. The transmitting/receiving device has a transmitting stage for transmitting a transmit signal to a first bus wire of a bus of the bus system, and for transmitting the transmit signal to a second bus wire of the bus, and an oscillation reduction module for damping an oscillation of a bus signal arising at terminals for the bus wires when the transmitting/receiving device acts as the transmitter of the transmit signal. The oscillation reduction module includes a first resistor, which is switchable between the first bus wire and a terminal for ground, and the oscillation reduction module including a second resistor, which is switchable between the second bus wire and a terminal for a voltage supply of the bus system.

A network hub device used for building a simple network configuration in an in-vehicle network system is provided. A network hub device (35) is coupled to a trunk network and performs input/output of a signal to/from an in-vehicle device via a plurality of device side communication ports. A signal conversion section (35a, 35b) configured to perform signal conversion between a digital control signal and an analog control signal is provided between a trunk side communication port and an analog port. A second signal conversion section (70) configured to perform signal conversion between a digital control signal and an analog control signal is provided between a digital port (49) and a predetermined in-vehicle device (353).

This application provides a CAN bus circuit and a CAN bus communications method. The CAN bus circuit used for CAN bus communication includes: at least one CAN unit and one bus, where a first CAN unit includes an input port and an output port, the first CAN unit is any one of the at least one CAN unit, the output port is connected to the bus by using a first circuit, the input port is connected to the bus by using a second circuit, a first diode is disposed on the first circuit, and a second diode is disposed on the second circuit.

An abnormality detection apparatus for a mobility entity and for detecting an abnormality in a network system is provided. The network system includes a first network and a second network that use different communication protocols. A first communication circuit receives state information indicating a state of the mobility entity. The state information is acquired from the second network. A second communication circuit transmits and receives a first frame according to a communication protocol used in the first network. A memory stores an abnormality detection rule. A processor detects, based on the state information and the abnormality detection rule, whether a control command included in the first frame received by the second communication circuit is abnormal. In a case where the control command is abnormal, the processor prohibits the control command from being transmitted.

A system for detecting anomalies in electrical wiring in a truck trailer. The system measures and compares current drawn from the truck tractor with the current drawn by a circuit at a particular trailer component or other location in the trailer wiring. If the two current measurements differ in excess of a predetermined threshold, the system can report a wiring anomaly. The location of the anomaly can then be determined by performing the operation for different trailer components thus testing multiple different branches of the trailer power distribution circuit, and using the results of these tests to determine that an anomaly is present, and possibly the location of the issue. The system may then send a notification to a remote computing device, to the truck tractor, or any combination thereof.