For the purpose of improving the resources utilization efficiency and decrease network redundancy of electric power communication network (EPCN), the paper explores using failure independent path protection preconfigured cycle (FIPP p-Cycle) to provide backup paths for electric communication service and presents a protection algorithm of enhanced FIPP p-Cycle with traffic grooming (EFIPP-TG). Firstly, the multiplexing conditions of FIPP p-Cycle are analyzed specifically, and we propose a FIPP p-Cycle multiplexing algorithm to improve the utilization efficiency of backup resources. Then segment protection algorithm for working path is designed to decrease service blocking ratio as much as possible. In addition, by taking advantage of traffic grooming strategy, the routing paths of services are optimized, yielding effective decrease of network blocking probability. Simulation results from different topologies demonstrate that compared with traditional FIPP p-Cycle scheme, other p-Cycle based protection algorithms and shared backup path protection algorithm, the proposed EFIPP-TG algorithm can significantly reduce the redundancy and blocking probability of networks, shorten the length of backup path and hence improve the reliability of service and performance of network survivability.

为提高电力通信网(EPCN)的资源利用效率，减少网络冗余，探索采用故障独立路径保护预配置循环(FIPP p-Cycle)为电力通信业务提供备份路径，并提出了一种保护具有流量疏导的增强型 FIPP p-Cycle 算法 (EFIPP-TG)。首先具体分析了FIPP p-Cycle的复用条件，提出了一种FIPP p-Cycle复用算法，以提高备份资源的利用效率。然后设计工作路径分段保护算法，尽可能降低业务阻塞率。此外，利用流量疏导策略，优化业务路由路径，有效降低网络阻塞概率。不同拓扑的仿真结果表明，与传统的FIPP p-Cycle方案、其他基于p-Cycle的保护算法和共享备份路径保护算法相比，所提出的EFIPP-TG算法可以显着降低网络的冗余和阻塞概率，缩短长度备份路径，从而提高服务的可靠性和网络生存能力。