电讯技术2024，Vol.64Issue(1)：83-90,8.DOI:10.20079/j.issn.1001-893x.220823003
特征关联的服务功能链可靠性优化算法
Reliability Optimization Algorithm of Service Function Chain Based on Feature Association
摘要
Abstract
For the problem of low resource utilization when optimizing the reliability of service function chain(SFC),a reliability optimization algorithm for SFC based on feature association is proposed.First,the advantages of the underlying node as a candidate node for virtual network function(VNF)instances are evaluated from the resource availability rate,the density of surrounding resources,and the centrality of the entire network,and the advantages of VNF instance as an alternative object are evaluated from the node degree and bandwidth traffic of VNF instance.Second,backup underlying nodes for the VNF instance with the highest superiority are selected one by one until the reliability of all SFCs meets customer requirements.When selecting backup underlying nodes for VNF instances,a backup node selection algorithm based on resource feature association awareness is proposed.The algorithm associates the underlying node mapped by the current VNF instance with the adjacent nodes of the underlying node of other VNF instances to be backed up.While selecting the optimal backup underlying node for the current VNF instance,it reduces the link overhead when selecting the backup underlying node for other VNF instances to be backed up.The simulation results show that compared with that of the existing algorithms,the number of backup instances is reduced by about 29%,the backup bandwidth resource consumption is reduced by about 42%,and the SFC acceptance rate is improved by about 12%.关键词
网络功能虚拟化(VNF)/服务功能链(SFC)/服务可靠性/资源备份/特征关联Key words
network function virtualization(NFV)/service function chain(SFC)/service reliability/resource backup/feature association分类
信息技术与安全科学引用本文复制引用
张顺利,邵苏杰..特征关联的服务功能链可靠性优化算法[J].电讯技术,2024,64(1):83-90,8.基金项目
国家重点研发计划(2018YFB1402704) （2018YFB1402704）
信息网络安全公安部重点实验室开放课题(C20612) （C20612）
