What is it about?
Ever wonder how the one-way delay is measured even when there is no time synchronization between the network nodes? Check our survey to see how this is done in traditional IP networks and also in SDN. This survey analyzes the merits and the shortcomings of 30 research works and standards, compares them according to their coverage, granularity, accuracy, cost and robustness; and discusses the advantages of SDN techniques with respect to delay measurement.
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Why is it important?
Our survey makes it easy to pick the technique suitable for measuring the one-way delay in many networks. Whether the delay is measured, per packet, per flow, per path aggregate, per-link, per-hop, end-to-end, in microseconds or in milliseconds; resilient to packet loss, duplication and re-ordering; Our survey will help master all these details to obtain the delay information that can be used for time sensitive apps, routing, load balancing, security analysis, packet queue management, congestion control, etc.
Perspectives
I hope you find this survey useful and join me in thinking about how to: unclog the controller in SDN when carrying network wide delay measurements, marry OWAMP with OpenFlow to increase the deployment of the former, exploit the streaming telemetry data and deep learning schemes to predict the average future delay; and other unsolved issues detailed in the conclusion of this paper.
Djalel CHEFROUR
University of Souk Ahras, Algeria
Read the Original
This page is a summary of: One-Way Delay Measurement From Traditional Networks to SDN, ACM Computing Surveys, July 2021, ACM (Association for Computing Machinery),
DOI: 10.1145/3466167.
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