Analysis of frame delay probability in the FlexRay dynamic segment

Abstract

FlexRay is a hybrid protocol that has both advantages of Event-triggered and Time-triggered paradigm, and has emerged as the de-facto standard for in-vehicle automotive communication. However, in order for FlexRay to be exploited successfully for in-vehicle network, performance and timing analysis are necessary. Even though it is widely believed that performance analysis is important, the high flexibility of FlexRay dynamic segment makes it difficult. In this paper, we propose the analysis model of FlexRay dynamic segment considering variable message length that share identical frame ID. Based on the model, we also analyze frame delay probability as performance assessment. Finally, how the change of the length of dynamic segment affects frame delay probability is shown.