| 摘要 |
PROBLEM TO BE SOLVED: To suppress a communication delay due to a load on the bus of a car onboard network while maintaining a bus resource to be allocated to communication for each of a car onboard ECU and an external node.SOLUTION: An ID having high priority is prepared, as a priority ID, one instance for one automotive network, and this priority ID is used in common for communication data between a plurality of car onboard ECUs. The car onboard ECUs normally are performing normal communication in which a low priority ID is set for each communication data between the ECUs, and, when a switchover request is received from an external node in normal communication with external nodes, a communication state is entered in which communication data having the priority ID imparted thereto is used. Then, the communication data having the priority ID imparted thereto is used for communication between the car onboard ECUs and external nodes. |
