US 12,307,830 B2
Vehicle communication system
Shuji Tomimatsu, Tokyo (JP); Tomoya Kitano, Tokyo (JP); Tatsuroh Saitoh, Tokyo (JP); Takumi Nomura, Tokyo (JP); and Sora Nishigaki, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Dec. 7, 2022, as Appl. No. 18/076,737.
Claims priority of application No. 2021-208253 (JP), filed on Dec. 22, 2021; and application No. 2022-133180 (JP), filed on Aug. 24, 2022.
Prior Publication US 2023/0196848 A1, Jun. 22, 2023
Int. Cl. G07C 5/00 (2006.01); H04L 12/40 (2006.01)
CPC G07C 5/008 (2013.01) [H04L 12/40 (2013.01); H04L 2012/40273 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A vehicle communication system comprising:
a relay device that relays data communication between a plurality of vehicle control ECUs mounted in a vehicle; and
two communication buses that connect between the relay device and each of the vehicle control ECUs,
wherein the relay device and the vehicle control ECUs:
perform communication of control data relating to a control operation for the vehicle by using a first communication bus that is one of the two communication buses, and
perform communication of the control data and/or communication of non-control data excluding data relating to a control operation for the vehicle by using a second communication bus that is another one of the two communication buses, and
wherein data to be communicated between the relay device and the vehicle control ECUs is assigned a priority level,
the relay device and the vehicle control ECUs communicate data to which a higher priority level is assigned in priority to other pieces of data,
the control data is assigned a higher priority level than that of the non-control data, and
a communication band of communication via the second communication bus to be performed between the relay device and the vehicle control ECUs is narrower than a communication band of communication via the first communication bus;
wherein the relay device has a priority level management unit that manages assignment of the priority level to the non-control data, and
while the vehicle stops, the priority level management unit assigns a higher priority level to the non-control data compared to a time when the vehicle is not stopped.