基于干扰估计的虚拟功能服务链创建及部署方法

摘要

针对网络功能虚拟化中服务链性能受到负载干扰的问题，提出一种考虑虚拟功能间干扰的虚拟功能服务链部署方法。首先，基于CPU利用率和I／O带宽对虚拟功能干扰度进行估计；然后，构建虚拟功能部署和链路创建模型，从链路速率、节点数量、延迟等角度提出了服务链部署优化目标；最后，以干扰度估计结果为依据，根据模拟退火思想提出一种服务链功能组合和选择方法，并利用部署模型将链路实例化。实验结果表明，与现有方法相比，该方法能够有效提高服务链的执行性能并满足部署优化目标。%Given the performance interference among virtual network functions,this paper proposed a method of deploying the service chain of virtual functions in order to solve such problems in network function virtualization.First,it evaluated the per-formance interference among virtual functions based on the utilization of CPU and I/O bandwidth.Then,it proposed a model of deploying the service chains of virtual functions,which took the link rate,the number of nodes and delay into consideration. Finally,it proposed a method of function composition and deployment of service chains based on performance interference.Ex-periments show that the proposed method can improve the execution performance of service chains effectively and reach the op-timization goals of the deployment.