Research On Ran Template Based 5g End-to-end Network Slicing Model And Deployment Strategy

With the evolution from 4G to 5G,mobile networks will support more diverse business scenarios.However,due to the simplification of existing network services,the ability of network services provisioning in complex environments is poor,and the joint optimization of multi-dimensional resource is inefficient.Therefore,there is an imperative requirement for mobile networks to be customized and coordinated.Network slicing,as a key technology of 5G,is dedicated to satisfy the differentiated Quality of Service requirements in 5G multi-service scenarios.Therefore,how to design and build end-to-end network slices for different business scenarios is a difficult problem for operators.In this paper,a 5G-oriented end-to-end network slicing model and several deployment strategies are proposed to realize the automatic generation and deployment of network slices.The main contributions of this dissertation are listed as follows:(1)A Radio Access Network(RAN)template based end-to-end network slicing model is proposed.This paper presents a general slice request model and an end-to-end network slice architecture based on the access network CU/DU funcationl split architecture.On this basis,an instantiation model of end-to-end network slicing for 5G different business scenarios is established,i.e.,RAN template.By abstracting common elements in end-to-end network,constraining slicing topology and node link parameters,the model fully reflects the attributes of network functional units and logical connections between nodes in slice instances.Based on the RAN template,two end-to-end network slice mapping algorithms and an algorithm optimization strategy based on slice classification are proposed.The simulation results show that the two mapping algorithms can achieve the slice embedding of the underlying physical network,and can reflect their own performance advantages under different traffic loads.At the same time,the optimization strategy improves the success rate of two slice mapping algorithms.(2)A resource management platform supporting end-to-end network slicing is designed and implemented.Considering the collaborative processing and flexible scheduling requirements of multi-dimensional resources in end-to-end networks and based on RAN template,this paper proposes the architecture of an resource management platform for optical and wireless convergence accessing which supporting end-to-end network slicing,and completed the development of several core modules in the platform.On this basis,combined with existing communication equipment and programmable hardware facilities,an experimental platform based on a variety of open source proj ects is built and achieves the establishment of end-to-end network slices.