面向多租户共享VNF实例的服务功能链动态映射方案  

Dynamic Embedding Scheme of Service Function Chain for Multitenant Shared VNF Instance

作　　者：王茗月 池亚平 杨心怡 WANG Mingyue;CHI Yaping;YANG Xinyi(School of Telecommunications Engineering,Xidian University,Xi’an Shannxi 710071,China;Department of Cyberspace Security,Beijing Electronic Science and Technology Institute,Beijing 100070,P.R.China)

机构地区：[1]西安电子科技大学通信工程学院,西安710071 [2]北京电子科技学院网络空间安全系,北京100070

出　　处：《北京电子科技学院学报》2023年第4期69-78,共10页Journal of Beijing Electronic Science And Technology Institute

摘　　要：针对如何将5G网络中动态到达的VNF实例所形成的服务功能链映射至底层物理网络的问题,设计了一种服务功能链动态映射方案。该方案将ASMA算法时延模型改进为端对端动态映射时延模型,基于该模型设计了VNF实例映射算法和VNF实例冗余算法,实现了VNF实例动态映射和冗余备份功能。通过MATLAB对整体方案进行仿真,并将该方案与ASMA的映射算法进行实验对比,结果表明该方案能够降低服务功能链映射的成本,且在业务流请求数较小时,能够有效减小服务功能链映射的传输时延与传播时延。To address the problem of embedding the service function chain composed of dynamically ar-riving VNF instances in 5G network into physical network,a dynamic service function chain embedding scheme is proposed,in which the delay model in ASMA algorithm is improved to an end-to-end dynamic embedding delay model.Based on the model,a VNF instance embedding algorithm and a VNF instance redundancy algorithm are designed to realize the functions of VNF instance dynamic embedding and in-stance redundant backup.The entire scheme is simulated in MATLAB and compared with the embed-ding algorithm in ASMA.Experiment results show that the proposed scheme could reduce the cost of service function chain embedding and efficiently reduce the transmission delay and propagation delay in-duced by the service function chain embedding in the case of small service request amount.

关 键 词：VNF实例 多租户叠加 工作流结构的服务功能链 VNF种类分组 动态映射 

分 类 号：TN91[电子电信—通信与信息系统]