| WDM光网中虚拓扑重构的优化设计 |
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| 引用本文： | 刘逢清,曾庆济,朱栩,肖石林.WDM光网中虚拓扑重构的优化设计[J].光子学报,2003,32(10):1175-1180. |
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| 作者姓名： | 刘逢清 曾庆济 朱栩 肖石林 |
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| 作者单位： | 上海交通大学宽带光网中心,上海,200030 |
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| 基金项目： | SupportedbyNationalHi techProject(863),withtheprojectNo.2 0 0 1AA12 10 73 |
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| 摘 要： | 采用优化方法来研究光网络业务发生改变时的虚拓扑重构问题,并提出了相应的混合整数线性规划算法.主要的思路是当业务发生改变时,寻找既能保证网络性能又对现有业务中断最小的虚拓扑.对影响虚拓扑重构的因素进行了研究,发现,如果使网络性能达到次优而不是最优可以大大减少对现有业务的中断.
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| 关 键 词： | WDM光网 虚拓扑重构 混合整数线性规划 平均分组跳数(APHD) |
| 收稿时间： | 2002-10-29 |
Virtual Topology Reconfiguration in WDM Optical Networks |
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| Abstract.Virtual Topology Reconfiguration in WDM Optical Networks[J].Acta Photonica Sinica,2003,32(10):1175-1180. |
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| Authors: | Abstract |
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| Institution: | R &; D Center for Broadband Optical Networking Techonology, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | Virtual topology reconfiguration in WDM optical networks is considered in this paper. It is formulated as an optimization problem and a Mixed Integer Linear programming (MILP) algorithm is presented. The main idea behind that is to find out the least lightpath changes needed for reconfiguration with guaranteed network performance after traffic demand changes. The relationship between lightpath changes and degradation of performance is analyzed. Numerical results show that a large cost reduction for reconfiguration can be achieved by giving up a small amount of network performance. |
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| Keywords: | WDM optical networks Virtual topology reconfiguration MILP Average packet hop distance (APHD) |
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