弹性光网络中基于频谱窗滑动的时变业务共享保护方法  

A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks

作　　者：刘焕淋[1] 张建剑 陈勇[2] 王展鹏 陈浩楠 邱艳 霍星吉 LIU Huanlin;ZHANG Jianjian;CHEN Yong;WANG Zhanpeng;CHEN Haonan;QIU Yan;HUO Xingji(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Automation,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学自动化学院,重庆400065

出　　处：《电子与信息学报》2023年第10期3694-3701,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(51977021,61275077);重庆市自然科学基金(cstc2020jcyj-msxmX0682)。

摘　　要：针对弹性光网络(EONs)中时变业务生存性传输时消耗频谱资源多和业务阻塞率高的问题,该文提出一种基于频谱窗滑动的时变业务共享保护(TTSP-SWS)算法。TTSP-SWS算法选择可用频谱块承载权重和保护频谱块共享度的共享保护路径代价函数值最小的保护路径;通过在保护路径上滑动频谱窗,将时变业务分配至频谱窗共享度最高的频隙位置;当时变业务带宽变化时,采用基于频谱窗滑动的生存性扩展或压缩频谱分配策略调整时变业务的带宽分配。仿真结果表明,该文所提TTSP-SWS算法能降低网络的业务阻塞率和保护资源冗余度。Considering the problems of high spectrum resource consumption and high traffic blocking probability during the time-varying traffic’s survivability transmission in Elastic Optical Networks(EONs),a Time-varying Traffic Shared Protection method based on Spectrum Window Sliding(TTSP-SWS)is proposed in this paper.In TTSP-SWS,the protection lightpath with the minimum cost including the load weight of available spectrum block and the sharing degree of protected spectrum block is selected as the protection lightpath for time-varying traffic.By sliding the spectrum window on the protection path,the spectrum window with high sharing degree is allocated to time-varying traffic.When the required bandwidth of time-varying traffic changes,a spectrum window sliding-based survivable spectrum expansion or compressed strategy is adopted to adjust the allocated bandwidth.Simulation results show that TTSP-SWS can reduce traffic blocking ratio and protection resources’redundancy.

关 键 词：弹性光网络 时变业务 共享保护 滑动频谱窗 阻塞率 

分 类 号：TN929.11[电子电信—通信与信息系统]