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.

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  1. D. K. Hunter, M. C. Chia and I. Andonovic, "Buffering in optical packet switches", J. Lightwave Technol., vol. 16, pp. 2081-2094, Dec. 1998 .
  2. D. K. Hunter, D. Cotter, R. B. Ahmad, W. D. Cornwell, T. H. Gilfedder, P. J. Legg and I. Andonovic, "2 < dformula > < dtex > < /dtex > < /dformula > 2 buffered switch fabrics for traffic routing, merging and shaping in photonic cell networks", J. Lightwave Technol., vol. 15, pp. 86-101, Jan. 1997.
  3. D. K. Hunter, W. D. Cornwell, T. H. Gilfedder, A. Franzen and I. Andonovic, "SLOB: A switch with large optical buffers for packet switching", J. Lightwave Technol., vol. 16, pp. 1725-1735, Oct. 1998.
  4. Y. Shimazu and M. Tsukada, "Ultrafast photonic ATM switch with optical output buffers", J. Lightwave Technol., vol. 10, pp. 265-272, Feb. 1992.
  5. A. Olsson, "Lightwave systems with optical amplifiers", J. Lightwave Technol., vol. 7, pp. 1071-1082, July 1989 .
  6. W. D. Zhong and R. S. Tucker, "Wavelength routing-based photonic packet buffers and their applications in photonic packet switching systems", J. Lightwave Technol., vol. 16, pp. 1737-1745, Oct. 1998.
  7. S. L. Danielsen, B. Mikkelsen, C. Joergensen, T. Durhuus and K. E. Stubjaer, "WDM packet switch architectures and analysis of the influence of tunable wavelength converters on the performance", J. Lightwave Technol., vol. 15, pp. 219-226, Feb. 1997 .

J. Lightwave Technol. (7)

D. K. Hunter, M. C. Chia and I. Andonovic, "Buffering in optical packet switches", J. Lightwave Technol., vol. 16, pp. 2081-2094, Dec. 1998 .

D. K. Hunter, D. Cotter, R. B. Ahmad, W. D. Cornwell, T. H. Gilfedder, P. J. Legg and I. Andonovic, "2 < dformula > < dtex > < /dtex > < /dformula > 2 buffered switch fabrics for traffic routing, merging and shaping in photonic cell networks", J. Lightwave Technol., vol. 15, pp. 86-101, Jan. 1997.

D. K. Hunter, W. D. Cornwell, T. H. Gilfedder, A. Franzen and I. Andonovic, "SLOB: A switch with large optical buffers for packet switching", J. Lightwave Technol., vol. 16, pp. 1725-1735, Oct. 1998.

Y. Shimazu and M. Tsukada, "Ultrafast photonic ATM switch with optical output buffers", J. Lightwave Technol., vol. 10, pp. 265-272, Feb. 1992.

A. Olsson, "Lightwave systems with optical amplifiers", J. Lightwave Technol., vol. 7, pp. 1071-1082, July 1989 .

W. D. Zhong and R. S. Tucker, "Wavelength routing-based photonic packet buffers and their applications in photonic packet switching systems", J. Lightwave Technol., vol. 16, pp. 1737-1745, Oct. 1998.

S. L. Danielsen, B. Mikkelsen, C. Joergensen, T. Durhuus and K. E. Stubjaer, "WDM packet switch architectures and analysis of the influence of tunable wavelength converters on the performance", J. Lightwave Technol., vol. 15, pp. 219-226, Feb. 1997 .

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