Scheduling algorithms for shared fiber-delay-line optical packet switches - Part II: The three-stage Clos-Network case

Shi Jiang, Gang Hu, Soung Y. Liew, H. Jonathan Chao

Research output: Contribution to journalArticlepeer-review

Abstract

In all-optical packet switching, packets may arrive at an optical switch in an uncoordinated fashion. To prevent packet loss in the switch, fiber delay lines (FDLs) are used as optical buffers to store optical packets. However, assigning FDLs to the arrival packets to achieve high throughput, low delay, and low loss rate is nota trivial task. In the authors' companion paper, several efficient scheduling algorithms were proposed for single-stage shared-FDL optical packet switches (OPSs). To further enhance the switch's scalability, this work was extended to a multistage case. In this paper, two scheduling algorithms are proposed: 1) sequential FDL assignment and 2) multicell FDL assignment algorithms for a three-stage optical Clos-Network switch (OCNS). The paper shows by simulation that a three-stage OCNS with these FDL assignment algorithms can achieve satisfactory performance.

Original languageEnglish (US)
Pages (from-to)1601-1609
Number of pages9
JournalJournal of Lightwave Technology
Volume23
Issue number4
DOIs
StatePublished - Apr 2005

Keywords

  • All-optical network
  • Clos-Network switch
  • Fiber delay line (FDL)
  • Optical cell switching (OCS)
  • Scheduling algorithm

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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