Research On Deployment Strategy For Wireless Network Slice Based On SDN/NFV

For 5G communication system,network slicing has become a key concept to meet a variety of different application scenarios.By dividing the infrastructure network into multiple dedicated logical networks,wireless networks can support multiple services.However,how to quickly deploy the end-to-end chip is the main problem in the multi-domain wireless network infrastructure.Generally speaking,network slicing is an end-to-end virtual network,including not only core network slicing,but also RAN slicing.At present,the application scenario of RAN slicing has not been considered separately,and the research of RAN slicing is still on the support of core network slicing function.Therefore,a flexible slice deployment strategy is needed to support unified user and service access by using the flexible and customizable access mechanism and protocol of wireless access network,improve the utilization rate of basic resources,increase the revenue of service providers,and provide support for the flexible deployment of 5G application and service adaptive wireless resources.This essay established a mathematical model to describe the deployment of network slices.Aiming at the three main service cases of 5G network: eMBBB slice,mMTC slice and uRLLC slice,the optimization objective and solution algorithm are proposed respectively.Based on the complex network theory,the topological characteristics of network infrastructure are analyzed.In the deployment of network slices,the topological characteristics of the network are combined with the local resources of the nodes.Tests are conducted to evaluate the performance of service-oriented deployment strategies.The results show that our deployment strategy performs better in resource efficiency and acceptance rate,and the execution time is shorter.