Concepts for Bitrate Enhancement and Latency Reduction in Recurring Disturbed CAN FD Networks

The automotive wiring harness poses a challenging electromagnetic environment with its extension and small distances between wires. The introduction of high voltage applications and Wide-Band-Gap (WBG) semiconductors in power electronic systems leads to steeper slopes of control signals, e.g. PWM signals. These signals can cause serious coupling to communication wires and reduce the bitrate. As the safety and reliability of communication are essential requirements of new technologies like autonomous driving, immunity of communication systems has to be investigated. This paper shows a theoretical analysis on the impact of recurring disturbances on communication performance caused by wire coupling. To reduce the impact of disturbance, cooperative operating strategies of the power electronic system and the communication system are proposed to avoid serious delays or bitrate reductions. The presented cooperative operating strategy is an adapted access method based on available time-triggered concepts.