The analysis of end-to-end delays based on AFDX configuration

AFDX (Avionics Full Duplex Switched Ethernet) is a new kind of real-time Ethernet, of which the end-to-end transmission delay has been a major concern. In this paper, configuration decomposition method based on AFDX configuration is proposed in three steps. Firstly, Virtual Links (VLs) are divided into direct influence set, indirect influence set and no influence set. Secondly, the whole AFDX configuration is divided into direct influence module and indirect influence module. Finally, network calculus theory is adopted to get the end-to-end delay upper bound. This method, which considers fully the mutual influence among the VLs, can provide guidance on the optimization design of delay in AFDX. Moreover, we show on a sample configuration, that configuration decomposition method outperforms the end-to-end delay upper bound obtained by the Trajectory approach.