Journal of Computer Applications

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Dynamic virtual topology reconfiguration algorithms for WDM optical networks

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  • Received:2008-07-24 Revised:2008-09-12 Online:2009-01-01 Published:2009-01-01
  • Contact: Li-Min PENG

WDM光网络动态虚拟拓扑重构算法

彭利民 刘浩 王伟兵   

  1. 华南理工大学 计算机科学与工程学院
  • 通讯作者: 彭利民

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Abstract: Aiming at the problem of the traffic changing dynamically in a Wavelength Division Multiplexing （WDM） optical network, the virtual topology designed for an old traffic set needs to be reconfigured to route more connections. Based on maximum link load and the average packet hop distance for increasing network throughput, an adaptive topology reconfiguration algorithm, which determined the change in the virtual topology with a corresponding change in the demand set, was proposed by formulating the reconfiguration problem as mixed-integer linear program in the paper. The performance of the proposed algorithm was studied through extensive simulation experiments. The simulation results show that the network performance can be improved significantly by the proposed algorithm.

Key words: dynamic traffic, virtual topology reconfiguration, mixed-integer linear program, optical networks, wavelength division multiplexing

摘要： 针对波分复用光纤网络上业务流量动态改变的问题，为了使光纤网络能支持更多的业务连接，需要对虚拟拓扑进行重构。基于链路最大负载和包平均跳步距离，利用混合线性规划公式对重构问题进行描述，在此基础上提出一个自适应拓扑重构算法,达到提高网络吞吐量的目的。仿真结果表明，该算法可以有效地改善网络性能。

关键词: 动态流量, 虚拟拓扑重构, 混合整数线性规划（MILP）, 光纤网络, 波分复用

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