System design issues for future in-vehicle Ethernet-based time- and safety-critical networks

Timing behavior predictability is a necessary real-time requirement for future switched Ethernet-based networks in the automotive and similar domains. Schedulability of such safety- and time-critical networks has to be guaranteed. The paper proposes a system architecture for future Ethernet-based advanced driver assistance systems (ADAS) and analyzes its timing requirements on transmission and forwarding deadlines. It studies the schedulability for strict priority combined with earliest deadline first (EDF) scheduling. For that, conditions on bandwidth utilization factors guaranteeing schedulability in the whole network are formally determined.