Upper and lower bounds of burst loss probability for a core node in an Optical Burst Switched network with Pareto distributed arrivals

M. Morsy, Mohammed Y. S. Sowailem, H. Shalaby
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引用次数: 3

Abstract

A mathematical model is introduced for performance evaluation of an OBS core node employing either no or full wavelength conversion strategies. Furthermore, the model assumes long-range dependent (LRD) traffic arrivals to the OBS intermediate node which are accurately modeled by Pareto distribution. In our proposed model, each output port is imitated by a GI/M/w/w queue for which a single performance measure; namely the burst loss probability, is evaluated from the model equations. Also, results of this model are compared with those obtained while assuming short-range dependent (SRD) Poisson arrivals to the core node in the two cases of no and full wavelength conversion. Finally, results show that traditional Poisson traffic models yields over-optimistic performance measures in terms of lower burst loss probability when compared to the more accurate long-range dependent Pareto traffic model. This discrepancy between the two models is much clearer for light traffic scenarios due to the more significant impact of self-similarity.
Pareto分布到达光突发交换网络中核心节点突发损失概率的上界和下界
介绍了采用无波长转换策略和全波长转换策略对OBS核心节点进行性能评估的数学模型。此外,该模型还假设到达OBS中间节点的远程依赖流量(LRD),并采用Pareto分布精确建模。在我们提出的模型中,每个输出端口由GI/M/w/w队列模拟,其中单个性能度量;即从模型方程中求出突发损失概率。同时,将该模型的计算结果与在无波长转换和全波长转换两种情况下假定泊松到达核心节点的短程依赖泊松到达的结果进行了比较。最后,研究结果表明,与更精确的远程依赖帕累托交通模型相比,传统的泊松交通模型在较低的突发损失概率方面产生了过于乐观的性能指标。由于自相似性的影响更为显著,两种模型之间的差异在轻交通场景中更为明显。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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