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Worst-case latency analysis for AVB traffic under overlapping-based time-triggered windows in time-sensitive networks


Citation

Shalghum, Khaled M. and Noordin, Nor K. and Sali, Aduwati and Hashim, Fazirulhisyam (2022) Worst-case latency analysis for AVB traffic under overlapping-based time-triggered windows in time-sensitive networks. IEEE Access, 10. pp. 43187-43208. ISSN 2169-3536

Abstract

Deterministic and low end-to-end latency communication is an urgent demand for many safety-critical applications such as autonomous vehicles and automated industries. The time-sensitive network (TSN) is introduced as Ethernet-based amendments in IEEE 802.1 TSN standards to support timetriggered (TT) traffic in these applications. In the presence of TT flows, TSN is designed to integrate Audio/Video Bridging (AVB) and Best Effort (BE) traffic types. Although AVB traffic has a lower priority than TT, it still requires low and deterministic latency performance, which may not be guaranteed under strict predefined TT scheduling constraints. For this reason, a window-overlapping scheduling algorithm is recently proposed in different works as analytical forms for TT latency under overlapping-windows based. But worst-case AVB latency evaluation under overlapped TT windows is also essential for critical optimizations and tradeoffs. In this paper, a worst-case end-to-end delay (WCD) for AVB traffic under overlapping-based TT windows (AVB-OBTTW) algorithm is proposed. Separate analytical models are derived using the network calculus (NC) approach for AVB-OBTTW with both non-preemption and preemption mechanisms. Using an actual vehicular use case, the proposed models are evaluated with backto-back and porosity configurations under light and heavy loading scenarios. For specific AVB credit bounds, a clear WCD reduction has been achieved by increasing the overlapping ratio (OR), especially under back-to-back configuration. Preemption and non-preemption modes are compared under different loading conditions, resulting in lower WCDs using preemption mode than non-preemption, especially with porosity style. Compared to the latest related works, AVB-OBTTW reduces WCD bounds and increases unscheduled bandwidth, leading to the highest enhancements with the maximum allowable OR.


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Official URL or Download Paper: https://ieeexplore.ieee.org/document/9758791

Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1109/ACCESS.2022.3168136
Publisher: Institute of Electrical and Electronics Engineers
Keywords: Safety-critical real-time systems; Time-sensitive network; Network calculus; Worst-case latency analysis; AVB traffic; Credit-based shaping; Autonomous vehicles; Time-aware shaping; Gate control list
Depositing User: Mr. Mohamad Syahrul Nizam Md Ishak
Date Deposited: 07 Feb 2024 01:42
Last Modified: 07 Feb 2024 01:42
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/ACCESS.2022.3168136
URI: http://psasir.upm.edu.my/id/eprint/102648
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