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On the Benefits of Traffic Segregation in WDM Networks

Fernando TrazziMoises RibeiroHelio Waldman

This paper investigates whether performance of WDM optical switching may be improved by traffic shaping. Heavy-tailed Pareto traffic transmission split into different wavelengths, according to the holding time, is here proposed as a means of traffic shaping aimed at the minimization of mean delay, jitter, or blocking-time probability in optical burst switching. It is found that burst segregation across n wavelengths (n x M/PT/1) may outperform classical WDM (M/P/n) systems as far as overall residual-service time is concerned. The existence of optimal segregation thresholds is analytically demonstrated. Results for the whole traffic show one order of magnitude reduction in mean delay, while jitter and blocking-time are, respectively, two and three orders of magnitude better than the classic WDM non-segregated approach.

http://www.lbd.dcc.ufmg.br:8080/colecoes/sbrc/2005/061.pdf

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