可靠性与拓扑感知的服务功能链备份保护方法

在网络功能虚拟化环境中,针对服务功能链部署时的可靠性研究存在资源利用率较低的问题,提出一种可靠性与拓扑感知的服务功能链备份保护方法.首先,利用最小费用最大流算法将服务功能链请求中的虚拟网络功能部署在可靠性较高的服务器节点上,尽可能提高服务功能链的可靠性.其次,针对未能达到可靠性需求的服务功能链,通过为部署在可靠性较低服...

Reliability and topology aware service function chain backup protection method

In the network function virtualization environment, for the problem of low resource utilization in the reliability research of service function chain (SFC)deployment, a reliability and topology aware SFC backup protection method is proposed. Firstly, a minimum-cost maximum-flow algorithm is used to deploy the virtual network functions of the SFC request on the server nodes with high reliability, so as to improve the reliability of the SFC as much as possible. Secondly, for the SFC which can not meet the reliability service requirements, redundant resources are reserved for the virtual network functions deployed on server nodes with low reliability to improve their reliability. Finally, redundant resource consumption can be minimized by redundant resources sharing. The simulation results show that the proposed method can improve the reliable deploying success ratio and resources utilization.