电力ASON中基于SRLG完全分离P圈的链路故障保护算法  

A link failure protection algorithm applying to power automatic switched optical network based on p-cycle with completely separated SRLG

作　　者：吴润泽[1] 胡秀园[1] 李彬[1] 唐良瑞[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《电力系统保护与控制》2013年第5期119-125,共7页Power System Protection and Control

基　　金：中央高校基本科研业务费专项资金(JB2012001)

摘　　要：结合电力光纤网络对网络生存性和可靠性的需求,在共享风险链路组的约束下,为电力ASON网络动态业务提出了一种基于P圈的链路故障保护算法。该算法采用整数线性规划模型,为给定的网络拓扑离线配置SRLG完全分离P圈集,以保证100%单链路故障保护的同时实现单SRLG故障保护。在动态业务环境下,该算法给出路由策略为业务动态计算工作路径和分配保护容量。仿真结果表明,所提算法具有部分双链路故障保护能力,所需的保护容量介于单链路故障保护和完全双链路故障保护之间,可为电力ASON网络中的单链路故障和完全双链路故障提供有效的混合保护。Combined with the requirements for survivability and reliability of power optical fiber communication network, a link failure protection algorithm based on p-cycle is proposed for dynamic traffic in the power automatic switched optical network under the constraints of shared-risk-link-group （SRLG）. For the given network topology, an integer linear programming model is designed to off-line configure an optimal set of p-cycles with completely separated SRLG. This configuration guarantees 100% single link failure protection; meanwhile, it achieves a single SRLG failure protection. In case of dynamic traffic, the optimal routing strategy is used to find the working path and allocate the protection capacity dynamically. The simulation results show that the proposed algorithm has the capability of partial double-link failure protection, and its protection capacity is between the capacity of single link failure protection and the full double-link failure protection. Therefore, the proposed algorithm is a kind of effective mixed protection of single link and full double-link failures protection in the power automatic switched optical network.

关 键 词：电力ASON P圈 SRLG 双链路故障 保护 

分 类 号：TN929.11[电子电信—通信与信息系统]