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Computation of tight bounds for the worst-case end-to-end delay on Avionics Full-Duplex Switched Ethernet
Date
2024-11-01
Author
Ayhan Kilinc, Zeynep
Schmidt, Şenan Ece
Schmidt, Klaus Verner
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Avionics Full-Duplex Switched Ethernet (AFDX) is a fault-tolerant real-time communication bus for safety–critical applications in aircraft. AFDX configures communication channels, denoted as virtual links (VLs), ensuring bounded message delays through traffic shaping at both end-systems and switches. Effective AFDX network design necessitates computing the worst-case end-to-end delay of time-critical VLs to meet specified message deadlines. This paper presents a new method for calculating tight bounds on the worst-case end-to-end delay for each VL in an AFDX network. We introduce the new notion of an extended uninterrupted transmission interval, which is the prerequisite for computing the worst-case queuing delay at switches. Adding up these queuing delays along the path of each VL between end-systems yields a tight upper bound on the worst-case end-to-end delay. The correctness of our results is formally proved, and comprehensive simulation experiments on different example networks confirm the tightness of our bound. These simulations also demonstrate the superior performance of our method compared to existing approaches that offer more pessimistic as well as optimistic results.
Subject Keywords
AFDX
,
Avionics
,
Real-time networks
,
Switched Ethernet
,
Worst-case delay
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85203639230&origin=inward
https://hdl.handle.net/11511/111239
Journal
Journal of Systems Architecture
DOI
https://doi.org/10.1016/j.sysarc.2024.103278
Collections
Department of Electrical and Electronics Engineering, Article
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BibTeX
Z. Ayhan Kilinc, Ş. E. Schmidt, and K. V. Schmidt, “Computation of tight bounds for the worst-case end-to-end delay on Avionics Full-Duplex Switched Ethernet,”
Journal of Systems Architecture
, vol. 156, pp. 0–0, 2024, Accessed: 00, 2024. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85203639230&origin=inward.