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arXiv 0912.0602cs.NI
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光WDM网络中的一种可靠容错路由

A Reliable and Fault Tolerant Routing for Optical WDM Networks

G. Ramesh, S. SundaraVadivelu

摘要:

在光WDM网络中,由于每条光路都可以承载大量的业务,因此故障可能会严重损害最终用户的应用。因此,容错成为这些网络上的一个重要问题。在正常运行时承载业务的光路称为主路,在故障时业务将在备用路径上重新路由。在本文中,我们提出了设计一个可靠的和容错的路由算法,建立主,备路径。为了建立主路径,该算法使用负载均衡,其中基于链路的当前负载来估计链路成本度量。在备用路径设置中,源通过从目的地接收的反馈来计算阻塞概率,方法是沿着现有路径发送一小部分探测数据包。然后选择具有最低阻塞概率的最佳光路。仿真结果表明,可靠的容错路由算法降低了阻塞概率和延迟,同时增加了吞吐量和信道利用率。

英文摘要:

In optical WDM networks, since each lightpath can carry a huge mount of traffic, failures may seriously damage the end user applications. Hence fault tolerance becomes an important issue on these networks. The light path which carries traffic during normal operation is called as primary path. The traffic is rerouted on a backup path in case of a failure. In this paper we propose to design a reliable and fault tolerant routing algorithm for establishing primary and backup paths. In order to establish the primary path, this algorithm uses load balancing in which link cost metrics are estimated based on the current load of the links. In backup path setup, the source calculates the blocking probability through the received feedback from the destination by sending a small fraction of probe packets along the existing paths. It then selects the optimal light path with the lowest blocking probability. Based on the simulation results, we show that the reliable and fault tolerant routing algorithm reduces the blocking probability and latency while increasing the throughput and channel utilization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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