Towards a bufferless optical internet

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

21 Scopus Citations
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Author(s)

  • Lachlan L. H. Andrew
  • Tony Cui
  • Bill Moran
  • Andrew Zalesky
  • Rodney S. Tucker

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2817-2833
Journal / PublicationJournal of Lightwave Technology
Volume27
Issue number14
Publication statusPublished - 2009

Abstract

This paper investigates the relationship between buffer size and long-term average TCP performance in dense wavelength division multiplexing (DWDM) networks. By investigating TCP NewReno, we demonstrate that buffer requirements are related to the number of wavelength channels at a bottleneck. With sufficient wavelengths, high throughput can be obtained with a buffer of one packet per channel; furthermore, there may be situations where an entirely bufferless optical packet switching (OPS) will become feasible. For this study, we develop new evaluation tools. First, we propose a method based on a two-part analytical model, with a new "open loop" component which approximates packet discarding in a bottleneck DWDM switch, and a "closed loop" fixed-point which reflects the impact of TCP. This analytical method provides accurate and scalable approximations of throughput and packet loss rate that can be used as part of a tool for DWDM network and switch design. Second, we propose an extrapolation technique to allow simulation of TCP over long ultra-high bit rate links, avoiding the intractable processing and memory requirements of direct simulation. This extrapolation technique enables us to validate the analytical model for arbitrarily high bit rate scenarios. © 2009 IEEE.

Research Area(s)

  • Bufferless optical packet switching (OPS), dense wavelength division multiplexing (DWDM) network, TCP

Citation Format(s)

Towards a bufferless optical internet. / Wong, Eric W.M.; Andrew, Lachlan L. H.; Cui, Tony; Moran, Bill; Zalesky, Andrew; Tucker, Rodney S.; Zukerman, Moshe.

In: Journal of Lightwave Technology, Vol. 27, No. 14, 2009, p. 2817-2833.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review