Data exchange with strong data transmission time guarantees is necessary in the internal communication of an aircraft. The Avionics Full Duplex Switched Ethernet (AFDX) has been developed for this purpose. Its design is based on the principle of a switched network with physically redundant links to support availability. It should also be tolerant to transmission and link failures in the network...

The ARINC-664, Part 7 (AFDX) standard defines a communications network based on Ethernet and the UDP/ IP protocols. Contrary to general-purpose Ethernet, the timing behavior in AFDX is deterministic due to the use of special network switches and end-systems with static routing tables and traffic policing at the sending end through mechanisms called virtual links. Even though the latencies in th...

Avionics systems distributed on AFDX networks are subject to stringe nt real-time constraints that require guaranteeing the Worst-Case Traversal Time (WCTT) on the network for each of the data flows. Over the last 10 years, since the initial use of Network Calculus in certification, important progresses have been made in AFDX timing verification. The maximum pessimism for the latencies is now k...

The present work aims at the reduction of transmission delay at the level of AFDX ES (Avionics Full Duplex Switched Ethernet End-Systems). To this end, two approaches, namely Network Calculus and response time analysis (RTA), are employed in the computation of upper bound delay. To evaluate the delay regarding different scheduling policies, the arrival curve of the flow on output of ES is estab...