基于链路生命期的光数据中心网络业务恢复方案  

Link-lifetime-based service restoration in optical datacenter network

作　　者：鲍宁海[1] 袁园 刘自谦 匡明 BAO Ninghai;YUAN Yuan;LIU Ziqian;KUANG Ming(School of Communication and Information Engineering,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

出　　处：《通信学报》2018年第8期125-132,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61671092);重庆市基础科学与前沿技术研究基金资助项目(No.cstc2016jcyjA0083);重庆市高校创新团队基金资助项目(No.KJTD201312)~~

摘　　要：针对大规模灾难事件对光数据中心网络造成的关联性和级联性故障,提出一种基于链路生命期的灾后业务恢复方案。该方案利用全局业务带宽退让和局部链路的有限生命期,缓解灾后网络的带宽资源危机,根据灾难损毁业务的带宽需求和持续时间需求,确定业务恢复优先级,采用任播与多播相结合的路由策略提高业务的连通性和带宽资源利用率。仿真结果表明,所提方案能够最大限度地降低业务中断率,并有效地延长灾难损毁业务的持续时间,减少数据流量损失。Aiming at the correlated and cascading failures caused by large-scale disasters,a post-disaster service restoration scheme was proposed.This scheme utilized global service bandwidth concession and the limited lifetime of local links to mitigate resource crunch in the post-disaster network.According to their bandwidth and holding time requirements,the impacted services for restoration was prioritized firstly,then jointly employed anycast and manycast routing strategies to improve the service connectivity and bandwidth resource utilization.Simulation results show that the proposed scheme can significantly reduce the service loss ratio,effectively prolong the holding time of the impacted services and decrease the data flow loss ratio in the post-disaster network.

关 键 词：光数据中心网络 链路生命期 网络生存性 业务恢复 业务持续时间 

分 类 号：TN929.11[电子电信—通信与信息系统]