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Lightweight Determinism in Large-Scale Networks | IEEE Journals & Magazine | IEEE Xplore
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Abstract:

In networking, determinism expresses the ability to deliver all data packets to their destinations within tight time intervals. A growing variety of network applications ...Show More

Abstract:

In networking, determinism expresses the ability to deliver all data packets to their destinations within tight time intervals. A growing variety of network applications and architectural paradigms require determinism. Examples include supercomputing, power-grid and railway control, industrial automation, and the disaggregation of mobile-network functions in edge-cloud data centers. End-to-end queuing latency is the primary metric that a network must control in order to realize determinism, since hard tight bounds on queuing latency also eliminate congestive packet losses and minimize latency jitter. IEEE and the IETF, the primary sources of standardization for determinism in bridged and routed networks, have been specifying traffic management techniques that are hard to deploy in practice because they require a complete refresh of the hardware infrastructure and complex provisioning procedures that limit their scalability and dynamicity. In this article we advocate the revival of a lightweight approach to determinism that aims at reconciling latency performance with practical feasibility. We enhance past versions of the approach with a novel traffic shaper for the ingress links of the deterministic domain that sharply lowers the queuing latency by constraining the scheduling decisions with routing information. The shaper minimizes the accumulation of queuing latency at every interior link of the domain by tightly controlling the latency contribution of every ingress link. Early experimental results consistently underscore the effectiveness of the new shaper.
Published in: IEEE Communications Magazine ( Volume: 62, Issue: 12, December 2024)
Page(s): 120 - 126
Date of Publication: 13 May 2024

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