电网技术2018，Vol.42Issue(3)：981-988,8.DOI:10.13335/j.1000-3673.pst.2017.1106
电力光通信网中基于P圈的多播业务保护算法
P-Cycle Based Protection Algorithm for Multicasting Services in Electric Optical Network
摘要
Abstract
In order to solve the problem of link protection for multicast services and improve wavelength utilization ratio in electric optical communication networks, a protection algorithm based on preconfigured cycle, namely p-cycle, is presented to protect the multicast communication services with link failure scenario in this paper. Based on analyzing the multicast services in electric optical communication network, an improved Prim algorithm is used to generate optimized multicast tree corresponding to multicast request. Based on this, a heuristic p-cycle generation algorithm is designed to connect destination nodes of the multicast tree to form a cycle to protect entire tree. Aiming to improve utilization efficiency of wavelength, multiplexing conditions of the p-cycles are studied, and by multiplexing the p-cycles configured in the network, the wavelength utilization ratio could be raised. In order to decrease blocking probability of the network, a capacity balancing strategy is adopted to generate the multicast tree and p-cycles. Simulation results show that the proposed algorithm significantly reduces redundancy and blocking probability of the electric optical communication network compared to existing Hamiltonian p-cycle and flow p-cycle protection schemes and performs well when the multicast group size is small.关键词
电力光通信网/P圈/多播保护/冗余度/光网络生存性Key words
electric optical communication network/p-cycle/multicast protection/redundancy/optical network survivability分类
信息技术与安全科学引用本文复制引用
李彬,卢超,朱朝阳,景栋盛,祁兵,孙毅..电力光通信网中基于P圈的多播业务保护算法[J].电网技术,2018,42(3):981-988,8.基金项目
国家电网公司科技项目(大受端电网紧急故障条件下用户负荷群快速调控系统的信息通信关键支撑技术研究,编号:SGJSSZ00FZWT1701004). Project Supported by Science and Technology Project of SGCC (SGJSSZ00FZWT1701004). （大受端电网紧急故障条件下用户负荷群快速调控系统的信息通信关键支撑技术研究,编号:SGJSSZ00FZWT1701004）
