WDM光网中虚拓扑重构的优化设计(英文)

Virtual Topology Reconfiguration in WDM Optical Networks

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 。

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.