基于智能P圈的多播业务光保护方案  

Efficiency-Score Based Intelligent P-cycle Protection of Multicast Sessions in WDM Networks

作　　者：刘非[1] 褚兵兵 沈建华[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《光通信研究》2016年第2期22-23,36,共3页Study on Optical Communications

摘　　要：生存性是WDM(波分复用)光网络的核心技术之一,对多播业务而言,IpC(智能P圈保护)是一种具有快速、高效等特点的保护算法。文章提出一种EIpC(增强型智能P圈)保护方案,包括分段和路径IpC算法,分段和路径IpC算法分别为每个分段和路径寻找新的P圈。理论分析和仿真结果表明,路径IpC在资源利用率、P圈构造个数以及圈平均覆盖度等方面最优,分段IpC次之,传统(链路)IpC最低。在先验效率方面,链路IpC最优,分段IpC次之,路径IpC最低。Survivability is one of the most important promising technologies in Wavelength Division Multiplexing(WDM)networks.The P-cycle based dynamic multicast protection scheme(IpC)is widely accepted as a good solution due to its fast restoration time and high capacity efficiency.This paper presents an improved IpC mechanism named EIpC including both the segment IpC and the path IpC algorithm simultaneously.The main feature of EIpC is to use segment IpC algorithm to find a new P-cycle for a segment and path IpC algorithm to find a new P-cycle for a path,respectively.Theoretical analysis and simulation results show that the path IpC has better performance in resource utilization,the number of P-cycle(s)and the P-cycle's average coverage,than the segment IpC and the classical(link)IpC.However,the link IpC has a higher average AE than the segment IpC and the path IpC.

关 键 词：波分复用 生存性 多播 P圈 

分 类 号：TN915.01[电子电信—通信与信息系统]