WDM光网络中能耗自感知的专有保护算法

Dedicated path protection algorithm with power-aware strategy in WDM optical networks

针对生存性波分复用网络中的能耗最小化和低阻塞率之间的矛盾,提出了一种基于成本因子的能耗自感知专有保护算法。首先,建立整数线性规划模型进行最优化设计;其次,通过实时感知链路的负载及能耗状态定义链路代价成本因子,使网络中工作路径和保护路径尽可能地分别汇聚在不同光纤上,同时设置空闲或保护资源为睡眠模式,从而实现网络的节能和业务的保护。仿真表明,与传统算法相比,所提算法在保持低业务阻塞率情况下,能较好地降低网络能耗。

In order to overcome the contradiction between power consmnption minimization and low blocking probability in survivable wavelength division multiplexing（WDM） networks,this paper proposed a novel heuristic algorithm of factor based cost of energy-aware with dedicated path protection（FBC-EA-DPP）.Firstly,it proposed an integer linear programming（ILP） formulation based on optimal design.Secondly,it defined the cost factor by jointly perceived the real-time load and energy consumption of links in the network.The proposed algorithm made all the working paths and backup paths converge on different fibers as much as possible,and switched idle or backup resources into sleep mode to realize power saving.Simulation results show that,compare with traditional algorithms,this algorithm can obtain notable power saving while maintaining a low blocking probability.