Optical burst switching (OBS) - a new paradigm for an optical Internet

  • Authors:
  • Chunming Qiao;Myungsik Yoo

  • Affiliations:
  • -;-

  • Venue:
  • Journal of High Speed Networks - Special issue on optical networking
  • Year:
  • 1999

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Abstract

To support bursty traffic on the Internet (and especially WWW)efficiently, optical burst switching (OBS) is proposed as a way tostreamline both protocols and hardware in building the futuregeneration Optical Internet. By leveraging the attractiveproperties of optical communications and at the same time, takinginto account its limitations, OBS combines the best of opticalcircuit-switching and packet/cell switching. In this paper, thegeneral concept of OBS protocols and in particular, those based onJust-Enough-Time (JET), is described, along with the applicabilityof OBS protocols to IP over WDM. Specific issues such as the use offiber delay-lines (FDLs) for accommodating processing delay and/orresolving conflicts are also discussed. In addition, theperformance of JET-based OBS protocols which use an offset timealong with delayed reservation to achieve efficient utilization ofboth bandwidth and FDLs as well as to support priority-basedrouting is evaluated.