生存波分复用网络的保护容量需求优化

Optimization of Protection Capacity Requirements in Survivable Wavelength Division Multiplexing Networks

为了最小化光传送网络生存方法的保护容量需求 ,以生存方法的工作机理为基础 ,使用多商品流理论构建了以网络链路容量造价为优化目标的优化模型 ,分析了不同生存方法的优化模型表达形式 ,解释了残余释放对路径保护方法的保护容量需求产生的优化效果 .使用禁止搜索算法对优化模型进行了仿真求解 .实验结果表明 :面向故障的路径保护方法对保护容量的需求要小于链路保护方法 。

An optimization model, whose objective is minimizing the cost of capacity accommodated on every fiber link in optical transport networks, is constructed on the basis of multi-commodity flow theory and survivability scheme operating principle. Representation of model is analyzed for different survivability schemes and the optimal effect for protection capacity requirements caused by stub release is investigated in path protection. The results obtained by tabu-search algorithm shows that fault-oriented path protection needs more protection capacity than link protection. It also reveals that selection of protection route and distribution of traffic demand have some effects on protection capacity requirements and complexity of algorithm.