Designing an optimal scheduler buffer in OBS networks

Andrew Zalesky, Hai L. Vu

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)


In this paper, we dimension a buffer in which headers are enqueued before processing in an optical burst switching (OBS) network. For the first time, we develop and analyze a unified OBS model comprising a set of homogeneous and independent edge buffers that feed bursts to a standalone link and their headers to a scheduler. Packets arrive at each edge buffer and are assembled into bursts, after which they are transmitted on a wavelength channel if their corresponding headers are successfully processed. In a case study, we demonstrate numerically that an optimal scheduler buffer size may exist and depends on the number of packets comprising a burst and the size of an edge buffer. We also show that packet blocking probability can be minimized using a simple rule of thumb for determining the optimal size of a scheduler buffer and the number of packets comprising a burst. All our analytical results are validated by way of simulation.

Original languageEnglish
Pages (from-to)2046-2054
Number of pages9
JournalJournal of Lightwave Technology
Issue number14
Publication statusPublished - 15 Jul 2008
Externally publishedYes


  • Blocking probability
  • Buffer dimensioning
  • Buffer overflow
  • Burst scheduling
  • Offset time
  • Optical burst switching (OBS)

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