摘要
为了应对网络切片中共享物理资源的虚拟网络功能(VNF)间因资源竞争带来的性能下降问题,提出了一种基于性能感知的网络切片部署方法。在网络切片实例部署时,采用先虚拟节点映射再虚拟链路映射的两阶段部署方式。在虚拟节点部署阶段,首先从资源供需的角度定义了VNF的性能影响因子,以量化VNF的性能影响程度;然后求出网络切片实例中所有VNF在可部署的物理服务器上的性能影响因子总和,将性能影响因子总和最小的物理服务器作为映射位置,采用模拟退火-离散粒子群算法求出节点映射结果。在虚拟链路部署阶段,采用最短路径算法求出链路映射结果。仿真结果表明,所提方法有效降低了其他网络切片实例对自身的服务性能影响。
In order to deal with the performance degradation caused by resource contention due to the sharing of physical resources between VNF in the network slicing,a network slicing deployment method based on performance-awareness was proposed.When deploying network slice instances,first two-phase deployment that mapping virtual nodes was adopted,and then virtual links were mapped.In the virtual nodes mapping phase,the VNF performance influences factor was defined from the perspective of resource supply and demand to quantify the degree of VNF performance impact.Then the sum of the performance influence factors of all VNF on the deployable physical server was found in the network slice instance,the physical server with the smallest sum of performance influence factors was used as the mapping location,and the simulated annealing-discrete particle swarm algorithm was used to find the nodes mapping result.In the virtual links mapping phase,the shortest path algorithm was used to obtain the link mapping result.The simulation results show that the proposed method reduces the impact of other network slices on its own service performance.
作者
黄开枝
潘启润
袁泉
游伟
汤红波
HUANG Kaizhi;PAN Qirun;YUAN Quan;YOU Wei;TANG Hongbo(National Digital Switching System Engineering and Technological R&D Center,Zhengzhou 450002,China)
出处
《通信学报》
EI
CSCD
北大核心
2019年第8期114-122,共9页
Journal on Communications
基金
国家重点研发计划网络空间安全专项基金资助项目(No.2016YFB0801605)
国家自然科学基金创新群体资助项目(No.61521003)
关键词
网络切片
虚拟网络映射
性能下降
性能隔离
network slicing
virtual network embedding
performance degradation
performance isolation