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Priority-based grant-aware scheduling for low-latency switching

  • Jongtae Song
  • Kyeong-Eun Han
  • Dae-Ub Kim
  • Chansung Park
  • Kwangjoon Kim
Original Paper
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Abstract

This paper introduces new scheduling algorithms supporting low-latency switching. The proposed grant-aware (GA) algorithm improves the average delay performance by using the grant information of previous iteration. The simulation result shows that the average delay of GA algorithm is about one-tenth of the existing algorithm in high-load condition. We also introduce two priority-based scheduling algorithms grant-aware and priority-aware (GAPA) algorithm and cyclic scheduling with the longest-queue-first (C-LQF) algorithm. In the priority-based scheduling, the scheduling priority of VoQ is determined based on its queue size. GAPA and C-LQF consider the priority only after the first iteration to prevent the starvation problem. The simulation result shows that GAPA and C-LQF scheduling achieves better performance than GA in terms of average delay, maximum delay, and hotspot throughput.

Keywords

Input-buffered switch Switch scheduling Low latency Priority scheduling 

Notes

Acknowledgements

This work was supported by Institute for Information & communications Technology Promotion (IITP) grant funded by the Korea government (MSIT) (No. 2016-0-00573, Development of Data Center Optical Networking Core Technologies for Photonic Frame-based Packet Switching).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Jongtae Song
    • 1
  • Kyeong-Eun Han
    • 1
  • Dae-Ub Kim
    • 1
  • Chansung Park
    • 1
  • Kwangjoon Kim
    • 1
  1. 1.ETRIDaejeonRepublic of Korea

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