针对双链路失效的鲁棒抗毁研究

Study on the Robust Survivability during Double-link Failure in Power WDM Network

伴随着电力通信传输系统网络拓扑的网状化发展,光纤链路失效的相关性日益增强,双链路失效成为亟待解决的问题。文章探究电力WDM光网络在业务需求矩阵不确知情况下的双链路抗毁问题,提出了两种基于软管模型和Valiant负载平衡机制的启发式算法:CVLBSP算法和DVLBSP算法,并通过计算机仿真对两种算法的性能进行了评估。结果表明,CVLBSP算法比以前的方案更节约开销,而DVLBSP算法则实现了开销和可靠性之间的较好折衷,能更加灵活地满足用户的需求。

In power WDM network survivability design, since the traffic demand matrix are difficult to forecast accurately, the traditional protection scheme can only be made based on peak volume of service between network nodes, often resuiting in a huge waste of resources. On the other hand, the failures of fiber links becomes increasingly more relevant in accompany with the development of power communication transmission system, whose topology trends to be meshed. As a result, it becomes quite urgent to study the issue of double-link failure survivability. This paper explores the double-link failure survivability in power WDM optical networks where the traffic demand matrix is not fully known. Two hose-model- based and Valiant-load-balancing-based heuristic algorithms, CVLBSP and DVLBSP are proposed and evaluated by com- puter simulations. The simulation results show that CVLBSP is more cost-efficient than previous scheme, while DVLBSP can not only reach a nice trade-off between cost and reliability, but also meet users＇ demands in a more flexible manner.