Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Ryo Yamane

Tatsuya Izumi

Takeshi Hagihara

Makoto Mashita

Ichiro Kanda

Masakatsu Moriguchi

Hideyuki Tanaka

Tadashi Matsumoto

Nobuyuki Kobayashi

Kazuki Kitagawa

Kazuyuki Inoue

A communication device includes: a data transmission unit that is connected to a communication bus to which a plurality of communication equipments are connected and transmits data; and a processing unit that performs processing. The order in which the plurality of pieces of communication equipment and the data transmission unit transmit data through the communication bus is determined in advance. A start signal indicating the start of data transmission is repeatedly transmitted through the communication bus. The data transmission unit transmits data according to the order when the start signal is transmitted. The processing unit changes the transmission interval of the start signal.

Communication device, communication system, and communication method

The in-vehicle device for receiving time synchronization information transmitted from each of a plurality of reference devices and transmitting the received time synchronization information to another device, includes: a communication unit configured to communicate with the other device; and an information processing unit configured to, if the communication unit receives a frame in which the time synchronization information is stored, store the time synchronization information in a specific queue with priority over other information, wherein the communication unit transmits the time synchronization information stored in the specific queue to the other device.

In-vehicle device, in-vehicle network system, and information processing method

A first ECU and a plurality of second ECUs are connected to a communication bus. The first ECU repeatedly transmits a beacon signal through the communication bus. Each of the first ECU and the plurality of second ECUs transmits data according to an order set in advance when the beacon signal is transmitted. The first ECU or the second ECU transmits dummy data whose transmission destination is different from the remaining ECUs when there is no transmission data to be transmitted to one of the remaining ECUs other than itself.

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Osaka, Japan

Ryo Yamane