Toyota Jidosha Kabushiki Kaisha

Denso Ten Limited

Katsutomo Sasakura

Kazuki Fujita

Hiroya Ando

Yusuke Satoh

Osamu Hirashima

Shumpei Omura

The communication control apparatus includes a communication apparatus and a controller. The communication apparatus saves received data in a reception buffer, executes transfer of the received data to a transfer destination buffer from the reception buffer, erases the transferred data from the reception buffer, and interrupts the transfer upon detecting abnormality. The controller transmits data or a command to the communication apparatus. The controller checks whether the data are saved in the reception buffer after transmitting the data to the control apparatus, and transmits a command for causing the communication apparatus to execute a software reset when at least some proportion of the data are saved.

Communication control apparatus and communication method

An apparatus includes a communication apparatus and a second controller. The communication apparatus includes a memory to store a program, a reception buffer to save reception data, a transfer destination buffer to receive transfer reception data and a first controller to erase the reception data when the reception data are transferred to the transfer destination buffer, and execute a hardware reset of erasing the program and executing an initialization process upon detecting abnormality. The second controller checks, after transmitting the data to the communication apparatus, whether the transmitted data are saved in the reception buffer after an elapse of a predetermined period of time shorter than a period of time till the hardware reset upon occurrence of abnormality in transferring the data. The second controller causes the communication apparatus to execute a software reset when at least some proportion of the transmitted data are saved in the reception buffer.

To provide a data relay device which prevents a significant delay even when pieces of data are transmitted/received in protocols that are different from each other. Transmission timings at which pieces of data are transmitted/received in a network using an event trigger type communication protocol are estimated. Stay periods which occur when pieces of data are relayed and transmitted at predetermined transmission timings in a network using a time trigger type communication protocol are calculated while changing a reference time for the time trigger type communication protocol. Then, synchronization processing is performed in the network using the time trigger type communication protocol such that communication is performed using a reference time having a small stay period that has been calculated.

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Kobe, Japan

Katsutomo Sasakura