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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 19,
  • Issue 9,
  • pp. 1241-
  • (2001)

Packet Loss and Delay Performance of Feedback and Feed-Forward Arrayed-Waveguide Gratings-Based Optical Packet Switches With WDM Inputs-Outputs

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Abstract

This paper analyzes the packet loss and delay performance of an arrayed-waveguide-grating-based (AWG) optical packet switch developed within the EPSRC-funded project WASPNET (wavelength switched packet network). Two node designs are proposed based on feedback and feed-forward strategies, using sharing among multiple wavelengths to assist in contention resolution. The feedback configuration allows packet priority routing at the expense of using a larger AWG. An analytical framework has been established to compute the packet loss probability and delay under Bernoulli traffic, justified by simulation. A packet loss probability of less than 10-9 was obtained with a buffer depth per wavelength of 10 for a switch size of 16 inputs-outputs, four wavelengths per input at a uniform Bernoulli traffic load of 0.8 per wavelength. The mean delay is less than 0.5 timeslots at the same buffer depth per wavelength.

[IEEE ]

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