Authors:
Soubhi, Mohamed; Echtle, Klaus (University of Duisburg-Essen, Institute for Computer Science and Business Information Systems, 45141 Essen, Germany)

Abstract:

This paper deals with the simulation of Clock Synchronization in Multi-Cluster systems that use FlexRay, a communication protocol designed by the FlexRay industry consortium in order to meet the fault-tolerance and dependability requirements of distributed real-time applications. Using SiMuFlex (Simulation model for Multi-Cluster FlexRay Systems), we investigate the performance of the clock synchronization algorithm and determine the amount of the system precision which is a measure for the quality of the clock synchronization. The simulation experiments are focused on the evaluation of the convergence and stability of the clock synchronization algorithm when the clock drift rates of several nodes undergo systematic variations. Moreover, we investigate the impact of the blackout and delays on the gateway component which interconnects the system clusters.

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