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arXiv · 2204.10906

Improved Network Calculus Delay Bounds in Time-Sensitive Networks

Ehsan Mohammadpour·Eleni Stai·Jean-Yves Le Boudec
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Abstract

In time-sensitive networks, bounds on worst-case delays are typically obtained by using network calculus and assuming that flows are constrained by bit-level arrival curves. However, in IEEE TSN or IETF DetNet, source flows are constrained on the number of packets rather than bits. A common approach to obtain a delay bound is to derive a bit-level arrival curve from a packet-level arrival curve. However, such a method is not tight: we show that better bounds can be obtained by directly exploiting the arrival curves expressed at the packet level. Our analysis method also obtains better bounds when flows are constrained with g-regulation, such as the recently proposed Length-Rate Quotient rule. It can also be used to generalize some recently proposed network-calculus delay-bounds for a service curve element with known transmission rate.

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Ehsan Mohammadpour, Eleni Stai, Jean-Yves Le Boudec. 2022-04-22. Improved Network Calculus Delay Bounds in Time-Sensitive Networks. https://doi.org/10.1109/tnet.2023.3275910

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