Hybrid wire-fiber data networks that include wire-fiber transceivers protected against environmental interferences. In some embodiments, a hybrid-wire-fiber data network of this disclosure provides a fiber-optic link between portions of one or more wired networks. In some embodiments, a hybrid wire-fiber data network of this disclosure includes a fiber-optic link that relies only on message-priority arbitration performed on wired portions of one or more wired networks. In some embodiments, a wire-fiber transceiver of this disclosure includes electromagnetic environment (EME) protective circuitry for one or both of input power and input signals. In some embodiments, a wire-fiber transceiver of this disclosure is configured for use with a controlled area network media-access protocol (CAN) and/or a derivative of CAN. Various data communication and other methods are also disclosed in addition to hybrid wire-fiber data networks and components thereof.

An electric system for transmitting serial communication messages with different priorities over a communication link. The data to be transmitted is arranged in serial communication messages comprising a start of packet (SOP) symbol and data symbols. The ongoing transmission of a first message is interrupted if a SOP symbol of a second message is sent before the first message has been completed. Transmission of the first message is continued only after the second message has been sent.

A method of communication in a vehicle network is provided. An example method includes transmitting a network allocation map in a TDMA cycle, indicating reservation of time slots in the TDMA cycle. The method further includes transmitting a synchronization signal in the TDMA cycle, to synchronize the timing of nodes in the vehicle network. Each of the reserved time slots is identified by at least a network ID of a transmitting node in the vehicle network, and a slot type comprising one of a low latency traffic slot, and a bulk traffic slot. Further, the low latency traffic slots are repeated in the TDMA cycle at least as frequently as a guaranteed QoS latency parameter. Further, the bulk traffic slots are at least as long as a guaranteed QoS throughput parameter.

A transfer device for coupling a priority signal and a standard signal and transferring the signal includes a reception unit that receives a plurality of signals transmitted from a device connected to an opposite side of a transfer route, a separation unit that separates the signal into the priority signal and the standard signal, a signal defragmentation unit that defragments the plurality of standard signals, a multiplexing unit that multiplexes each of the priority signal and the standard signal, a priority control unit that determines a transfer order of the signals, a header information copy unit that copy header information of the standard signal, a transmission unit that transmits the signal to a device connected to the transfer route, an interrupt transfer processing unit that perform an interruption process when the priority signal arrives during the transfer of the standard signal, a signal fragmentation unit that fragments the standard signal, a header information assignment unit that assigns the header information to the standard signal, and a transmission delaying unit that delays the transfer of the standard signal until the priority signal has been transferred.

An on-board network system includes: a main arithmetic unit; a plurality of communication paths extending in different directions toward respective portions of a vehicle body; a plurality of sub-arithmetic units on the communication paths; and a storage device storing a priority order of communications according to a type of communication data. At a disturbance of one of the communication paths connected to one of the sub-arithmetic units, the main arithmetic unit reduces communications having a priority lower than a predetermined criterion and assigns, to the area with the communications reduced, communication data having a priority higher than the predetermined criterion among the communication data in the one of communication paths disturbed to continue communications in the other communication paths.

A transceiver for sending and receiving data from a controller area network (CAN) bus is disclosed. The transceiver includes a microcontroller port, a transmitter and a receiver, wherein the transceiver is configured to determine bit timings from a data frame received by the receiver. The transceiver is further configured to detect attempts to introduce a signal glitch in a predetermined portion of the data frame and upon detection of the signal glitch, the transceiver is configured to invalidate the data frame on a transmission line and/or disable the transmitter for a predetermined period.

A network routing device for transmitting a frame between nodes connected to different communication networks among a plurality of communication networks is disclosed. The network routing device includes a routing processing circuit configured to determine a second network that is a routing target among the plurality of communication networks based on frame information received from a first network transmitting a frame among the plurality of communication networks. The network routing device also includes a frame conversion circuit configured to convert the frame to be compatible with the second network.

Hybrid wire-fiber data networks that include wire-fiber transceivers protected against environmental interferences. In some embodiments, a hybrid-wire-fiber data network of this disclosure provides a fiber-optic link between portions of one or more wired networks. In some embodiments, a hybrid wire-fiber data network of this disclosure includes a fiber-optic link that relies only on message-priority arbitration performed on wired portions of one or more wired networks. In some embodiments, a wire-fiber transceiver of this disclosure includes electromagnetic environment (EME) protective circuitry for one or both of input power and input signals. In some embodiments, a wire-fiber transceiver of this disclosure is configured for use with a controlled area network media-access protocol (CAN) and/or a derivative of CAN. Various data communication and other methods are also disclosed in addition to hybrid wire-fiber data networks and components thereof.

A computer-implemented method for synchronizing nodes on a controller area network includes identifying, via a processor, a node from a plurality of nodes as a sync master node; designating, via the processor, each of the remaining nodes as a sync slave node; designating, via the processor, the first message from the sync master node as a sync message; assigning, via the processor, the lowest number, among all the message IDs in the network system, to the message ID of the sync message; determining a sync message target receiving time on a sync slave node; and triggering an interrupt to the processor responsive to receiving the sync message on a sync slave node in the controller area network to perform time adjustment on the sync slave node.

According to an embodiment, a portable terminal provides maintenance information to a maintenance server that manages the maintenance information. The portable terminal acquires the maintenance information from an external recording medium. The portable terminal acquires, from the maintenance server, rank information indicating a transmission priority defined for the maintenance information. The portable terminal determines, in accordance with a type of a communication line that can be used by a communication device and the rank information, whether to transmit the maintenance information.