At present, there are more and more functions of vehicles, including driving assistance functions: such as 360-degree panoramic view, automatic parking, lane departure warning, lane keeping, ACC (adaptive cruise), forward collision warning, reverse side warning, blind spot assist, etc. ;Comfort functions: such as air suspension, seat mirror adjustment memory, etc., the realization of these functions is achieved by adding corresponding controllers. In addition, the current controller design basically considers functional safety, and its control strategy It is more complete and complex, and the number of signal interactions between the corresponding controllers is also greatly increased. These huge numbers of signals must rely on data transmission buses such as CAN, CANFD, MOST, FlexRay and the Ethernet that is gradually being used.