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Integrated model for performance analysis of all-optical multihop packet switches

机译：用于全光多跳数据包交换机性能分析的集成模型

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摘要

The overall performance of an all-optical packet switching system is usually determined by two criteria, i.e., switching latency and packet loss rate. In some real-time applications, however, in which packets arriving later than a timeout period are discarded as loss, the packet loss rate becomes the most dominant criterion for system performance. Here we focus on evaluating the performance of all-optical packet switches in terms of the packet loss rate, which normally arises from the insufficient hardware or the degradation of an optical signal. Considering both aspects, we propose what we believe is a new analysis model for the packet loss rate that reflects the complicated interactions between physical impairments and system-level parameters. On the basis of the estimation model for signal quality degradation in a multihop path we construct an equivalent analysis model of a switching network for evaluating an average bit error rate. With the model constructed we then propose an integrated model for estimating the packet loss rate in three architectural examples of multihop packet switches, each of which is based on a different switching concept. We also derive the bounds on the packet loss rate induced by bit errors. Finally, it is verified through simulation studies that our analysis model accurately predicts system performance.
机译：全光分组交换系统的总体性能通常由两个标准来确定，即交换等待时间和分组丢失率。但是，在某些实时应用中，将比超时时间晚的数据包作为丢失丢弃，丢包率成为系统性能的最主要标准。在这里，我们着重于根据丢包率评估全光包交换机的性能，这通常是由于硬件不足或光信号质量下降而引起的。考虑到这两个方面，我们提出了一种我们认为是丢包率的新分析模型，该模型反映了物理损伤和系统级参数之间的复杂相互作用。基于多跳路径中信号质量下降的估计模型，我们构建了交换网络的等效分析模型，用于评估平均误码率。通过构建模型，我们然后提出了一个集成模型，用于估计多跳分组交换机的三个体系结构示例中的分组丢失率，每个示例均基于不同的交换概念。我们还导出了由误码引起的丢包率的界限。最后，通过仿真研究证明我们的分析模型可以准确预测系统性能。

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