Design And Implementation Of End-to-End Network Slicing Based On SDN/NFV

Faced with the emergence of multi-service scenarios in the era of 5G network,traditional network is difficult to flexibly adapt to diversified business needs due to its closed and rigid architecture.Therefore,the business-driven 5G network will meet the business needs of different vertical industries based on the shared physical network infrastructure.As a key technology in the evolution of 5G network architecture,end-to-end network slicing can logically divide unified physical network into multiple virtual networks.Depending on the development of Software Defined Networking(SDN)and Network Function Virtualization(NFV)technology,end-to-end network slicing can be used to distribute differentiated network resources to business data in the network on demand,thus greatly improving the utilization rate of network resources.In this paper,an end-to-end network slicing implementation scheme is designed based on SDN/NFV technology,and the implementation scheme of end-to-end network slicing is designed hierarchically from the user plane and the control plane.Among them,the userplane network slice is composed of terminal layer,forwarding layer and application layer,which is used to build end-to-end logical paths for different business data.The control-plane network slice is composed of three layers: network virtualization layer,control layer and business management layer.It is used to develop differentiated control strategies for the business data in the user-plane network slice,so as to realize fine-grained management of the user-plane network slice.Furthermore,this paper introduces in detail the design process of user-plane network slice and control-plane network slice,and implements the key technologies used in each level.Combining the implementation of technologies at every level,this paper also builds an end-to-end network slicing experiment platform based on Wi Fi wireless network.By providing customized network resources for web pages and video services accessed by end users,the Qo S of each service is guaranteed.What's more,the feasibility of the end-to-end network slicing scheme is verified.Facing the three basic business scenarios in 5G network,this paper also builds a remote selfcontrolled inverted pendulum service scenario based on the realized end-to-end network slicing platform.As a typical u RLLC service,industrial remote control has high delay and reliability requirements for data transmission networks.The remote self-control inverted pendulum system built in this paper is composed of four parts: main control development board,Wi Fi wireless module,network slice module and strategy control module.The main control development board is used to collect sensor data of the underlying hardware,and then the collected data is sent to the strategy control module in Wi Fi wireless mode through the Wi Fi wireless module.The control algorithm in the strategy control module processes the data and feeds the results to the underlying hardware.During the process of data interaction,the network slice module realizes Qo S guarantee for inverted pendulum service.In this paper,a more optimized Qo S guarantee strategy was developed for the inverted pendulum business from the two aspects of the queue priority of the forwarding layer of the user-plane network slice and the container resource limitation of the application layer,which realized the normal operation of the remote self-controlled inverted pendulum system and verified the supporting characteristics of the end-to-end network slicing for u RLLC business.To sum up,this paper mainly designs and verifies the end-to-end network slicing technology in 5G network,and formulates and optimizes the Qo S guarantee strategy for the u RLLC business oriented end-to-end network slicing.In addition,there are also some deficiencies in the program design process in this paper.For example,when creating network slices for different businesses,the optimal allocation of slice resources is not carried out,but the normal operation of each business is fully guaranteed.Similarly,the hierarchical end-to-end network slicing scheme designed in this paper requires slicing configuration at all levels when creating network slicing,it is difficult to efficiently manage the life cycle of network slicing.Therefore,the resource allocation mechanism and management scheduling function can be introduced in future studies to further optimize the scheme.