一种基于备份代价重要度的虚拟网络功能备份方法  

Method for virtual network function backup based on backup-cost importance

作　　者：王琛 汤红波[1] 游伟[1] 牛犇[1] Wang Chen;Tang Hongbo;You Wei;Niu Ben(National Digital Switching System Engineering Technological Research Center,Zhengzhou 450000,China;32128 Troops of PLA,Jinan 250000,China)

机构地区：[1]国家数字交换系统工程技术研究中心,郑州450000 [2]中国人民解放军32128部队,济南250000

出　　处：《计算机应用研究》2019年第12期3830-3832,共3页Application Research of Computers

基　　金：国家“863”计划资助项目;国家自然科学基金资助项目;国家重点研发计划资助项目

摘　　要：为了保证网络服务的可靠性,降低备份资源成本开销,首先在初始映射视图中计算每个虚拟网络功能的备份代价重要度,每次迭代选择具有最大和次大备份代价重要度的虚拟网络功能进行联合备份,通过相应的选择和更新模型最终得到最优的备份策略。最后,将该方法与其他三种方法进行对比实验,所提算法在备份成本开销、占用的物理节点数量、服务请求接受数量和备份资源利用率上具有良好的性能。To ensure the reliability of network services and reduce the cost of backup resources,first,by ordering the backup-cost importance of the virtual network functions,this paper made a joint backup of virtual network function with the largest and second largest backup-cost importance in each iteration,and obtained the optimal backup strategy through the corresponding selection and updated model. Finally,the method was compared with other three methods,the proposed method has better performance in the backup cost,the amount of used physical node,the number of accepted service requests and backup resource utilization.

关 键 词：网络功能虚拟化 虚拟网络功能 服务功能链 备份代价重要度 联合备份 

分 类 号：TN915.81[电子电信—通信与信息系统]