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Improving the Worst-Case Delay Analysis of an AFDX Network Using an Optimized Trajectory Approach

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3 Author(s)
Bauer, H. ; Airbus France, Toulouse, France ; Scharbarg, J. ; Fraboul, C.

Avionics Full Duplex Switched Ethernet (AFDX) standardized as ARINC 664 is a major upgrade for avionics systems. The mandatory certification implies a worst-case delay analysis of all the flows transmitted on the AFDX network. Up to now, this analysis is done thanks to a tool based on a Network Calculus approach. The more recent Trajectory approach has been proposed for the computation of worst-case response time in distributed systems. This paper shows how the worst-case delay analysis of the AFDX can be improved using an optimized Trajectory approach. The Network Calculus and the Trajectory approaches are compared on a real avionics AFDX configuration. Moreover, an evaluation of an upper bound of the pessimism of each approach is proposed.

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Industrial Informatics, IEEE Transactions on  (Volume:6 ,  Issue: 4 )