Research On Architecture And Choice Admission Algorithm Of 5G Network Slicing

Network slices are formed by technologies such as SDN and NFV.With each network slice to carry specific network functions and form a logical network to meet the needs of different network functions in multiple usage scenarios in a 5G environment,The idea of making 5G network all-connected is possible,and has aroused widespread concern in academia and industry,It is considered as one of the core technologies of the next-generation wireless communication system.However,network slicing is an emerging technology,the selection architecture of network slice and network functions for UE is an important factor that affects its system performance.In order to further research on the emerging technology of network slicing,this thesis intends to study the selection function and architecture of network slicing,and make the research on network slicing further.The main work is summarized as follows:1.Analyze the basic principles and architecture of network slicing and consider the similarity between RAN's network slicing scheme and other RAN slicing and CN slicing schemes.On the basis of reviewing the existing network slicing architecture,a more suitable network slicing selection architecture scheme is given.2.In order to enable the UE to efficiently select network slices,In view of the characteristics of the network slicing,the dual influence of the network slicing on the user and the priority of the service is reflected,this thesis presents a new heuristic-based 5G network slice selection admission algorithm.First it dictates for the simultaneous management of the priority among different slices(i.e.,inter-slice)and the priority among the users belonging to the same slice(i.e.,intra-slice).And then meet the user's access request according to the inter-slice and intra-slice priority,and dynamically allocate network resources to different slices.The user experience quality(QoE)within each slice is maximized by taking into account the inter-slice priority to maximize the user's needs.The simulation results show that the proposed algorithm can provide a higher user experience,increase the utilization of network resources,and satisfy higher scalability when the number of users in each slice increases.3.In view of the idea of increasing operator's revenue in 5G network,Network slicing is introduced to partition the physical network to different slices to be configured for providing different quality of service as requested by the slice' operator and required by the slice' users.This thesis proposes 5G network slice based on auction model.Using this model can greatly increase the operator's network revenue.And analyzes the auction scheme of network slice and network slice based on price competition mechanism,proposed a pricing mechanism based on price competition and a network slices two-step auction mechanism to improve satisfaction.Through extensive simulation study,we demonstrate our proposed auction model can allocate network resources to network slices for providing higher satisfaction of requirements per network slice,and increased network revenue.