Traffic grooming in WDM/SONET BLSR rings with multiple line speeds

Huan Liu, F. Tobagi
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引用次数: 13

Abstract

WDM/SONET provides a natural migration path to support traffic growth. In WDM/SONET, each wavelength is a separate SONET ring and each ring can be set to one of several line speeds. The line speed should be high if there is enough traffic to realize the economy of scale, otherwise, it should be low to reduce the cost. Despite of the advantages, there are no general tools and methodologies available to help network designers enjoy the benefits of multiple line speeds. For the first time, we propose a comprehensive approach to solve the traffic grooming problem, which includes both novel, complete ILP formulations that can be used to solve small size problems exactly and an efficient heuristic algorithm that can be used to solve large problems quickly. Using the tools we developed, we study the trade-offs of shortest path routing, study the cost benefits of traffic switching, compare UPSR and BLSR, and show that multiple line speeds can significantly reduce cost
具有多种线路速度的WDM/SONET BLSR环中的流量疏导
WDM/SONET提供了一个自然的迁移路径来支持业务增长。在WDM/SONET中,每个波长是一个单独的SONET环,每个环可以设置为几种线路速度之一。如果有足够的流量以实现规模经济,则线速度应高,否则应低,以降低成本。尽管有这些优点,但目前还没有通用的工具和方法来帮助网络设计人员享受多线路速度的好处。我们首次提出了一种解决流量疏导问题的综合方法,其中包括可用于精确解决小规模问题的新颖完整的ILP公式和可用于快速解决大问题的高效启发式算法。使用我们开发的工具,我们研究了最短路径路由的权衡,研究了流量交换的成本效益,比较了UPSR和BLSR,并表明多种线路速度可以显着降低成本
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