Worst-Case Traversal Time Modelling of Ethernet Based In-Car Networks Using Real Time Calculus

The paper addresses performance modelling of safety critical Ethernet networks with special attention to in-car networks. A specific Ethernet/IP based in-car network is considered as use-case. The modelling is based on the analytical method Real-Time Calculus (RTC), providing hard bounds on delay and buffer utilization. We show how RTC can be applied on the use-case network. Furthermore, we develop a network simulation, used to evaluate the overestimation. It is found that the delays from RTC is significantly overestimated. The bounds from RTC, however, are guaranteed bounds, which is not the case for the simulated. Real-Time Calculus, Vehicular Networks, Performance Modelling, Ethernet Modelling, Delay Bounds.