In an electronic control unit, it is determine whether a data frame received from a different electronic control unit via a communication network is abnormal. A prediction data, which is predicted to be a normal data supposed to be included in the data frame determined to be abnormal, is generated by using a past data that is a data included in stored data frames, based on a stored prediction generation method. A prediction data frame including the prediction data is transmitted via the communication network.

In one or more embodiments, a system includes a plurality of network devices comprising a plurality of ports, a power bus connecting the network devices, wherein power is shared between the network devices over the power bus, and a controller for identifying available power and allocating power to the ports. The ports include a plurality of PSE (Power Sourcing Equipment) PoE (Power over Ethernet) ports each operable to transmit power to a device connected to one of the PSE PoE ports, a plurality of PD (Powered Device) PoE ports each operable to receive power from a device connected to one of the PD PoE ports, and a plurality of bi-directional PoE ports each configurable to operate as a PSE PoE port to transmit power to a device connected to one of the bi-directional PoE ports or as a PD PoE port to receive power from the connected device.

One embodiment is directed a powered device that comprises a connector to connect a multi-conductor cable to the powered device and device circuits partitioned into a first partition and a second partition. The powered device is configured to receive power from a first cable circuit and a second cable circuit provided over the multi-conductor cable. The powered device is configured to separately power the first partition using power received from the first cable circuit and power the second partition using power received from the second cable circuit and to power isolate the first cable circuit from the second cable circuit. The powered device further comprises at least one isolation device coupled to the first partition and the second partition and configured to enable information to be communicated between the first partition and the second partition. Other embodiments are disclosed.

The master interface generates copy data by copying the first data, and generates an error detection code based on the copy data. The protocol conversion unit generates the second data by converting the first data from the first protocol to the second protocol. The slave interface detects errors in the copy data based on the error detection code. The slave interface also generates the first verification data by performing a conversion from one of the first protocol or the second protocol to the other for one of the second data or copy data. In addition, the slave interface compares the second verification data with the first verification data, using the other of the second data or copy as the second verification data.

A low voltage drive circuit includes a transmit digital to analog circuit that converts transmit digital data into analog outbound data by: generating a DC component; generating a first oscillation at a first frequency; generating a second oscillation at the first frequency; and outputting the first oscillation or the second oscillation on a bit-by-bit basis in accordance with the transmit digital data to produce an oscillating component, wherein the DC component is combined with the oscillating component to produce the analog outbound data, and wherein the oscillating component and the DC component are combined to produce the analog outbound data. A drive sense circuit drives an analog transmit signal onto a bus, wherein the analog outbound data is represented within the analog transmit signal as variances in loading of the bus at the first frequency and wherein analog inbound data is represented within an analog receive signal as variances in loading of the bus at a second frequency.

Methods and systems for identifying manufacturer-specific controller-area (CAN) data for a vehicle type are provided. Manufacturer-specific CAN data may be identified by processing defined CAN data having a correlation relationship with the target data and undefined manufacturer-specific CAN data for determining if there is a correlation relationship therebetween. Also provided are methods and systems for identifying and automatically collecting manufacturer-specific CAN data for a vehicle type.

Methods and systems for identifying manufacturer-specific controller-area (CAN) data for a vehicle type are provided. Manufacturer-specific CAN data may be identified by processing defined CAN data having a correlation relationship with the target data and undefined manufacturer-specific CAN data for determining if there is a correlation relationship therebetween. Also provided are methods and systems for identifying and automatically collecting manufacturer-specific CAN data for a vehicle type.

A user station for a serial bus system. The user station includes a receiver for receiving a signal from a bus of the bus system, and a device for evaluating the reception signal that is output by the receiver. The receiver generates a digital reception signal from the signal received from the bus and to output the signal to the device at a terminal. The device evaluates the digital reception signal with regard to a predetermined communication protocol that establishes when a predetermined communication phase, which indicates a subsequent transfer of useful data in a message, begins and ends. The device reverses the data flow of the digital reception signal to the receiver at the terminal for a time period of at least one bit if the evaluation of the device shows that data at that time are being received from the bus in the predetermined communication phase.

A user station for a serial bus system. The user station includes a receiver for receiving a signal from a bus of the bus system, and a device for evaluating the reception signal that is output by the receiver. The receiver generates a digital reception signal from the signal received from the bus and to output the signal to the device at a terminal. The device evaluates the digital reception signal with regard to a predetermined communication protocol that establishes when a predetermined communication phase, which indicates a subsequent transfer of useful data in a message, begins and ends. The device reverses the data flow of the digital reception signal to the receiver at the terminal for a time period of at least one bit if the evaluation of the device shows that data at that time are being received from the bus in the predetermined communication phase.

A relay device relays a management frame between nodes connected to mutually different communication buses. The relay device includes (i) communicator units provided respectively to correspond to the communication buses, and (ii) communication controller units provided respectively to correspond to the communicator units. The communication controller unit respectively includes a corresponding transmission buffer configured to store the management frame, which is to be transmitted from the communicator unit corresponding to the communication controller unit. In response to determining that the management frame is retained in the transmission buffer corresponding to the communication controller unit, the communication controller unit transmits the management frame, which is received at a present time and stored in the transmission buffer, from the communicator unit corresponding to the communication controller unit.