Resource Allocation And Performance Analysis In Virtualized Relaying Network

Due to the increasing demand of users,and the limited physical spectrum resources,resource allocation becomes more and more important.How to effectively allocate resources within limited spectrum resources and meet the needs of more users has become one of the important issues to be solved in communications.This article combines the virtualization technology with the relay network,deeply studies the network resource allocation technology,and completes the following work:First of all,this article introduces the key technology of relay communication resource allocation.The definition and three basic requirements of virtual network are briefly introduced.At the same time,it describes the theoretical knowledge of the important technologies in the relay network and some research results about the allocation of resources in the relay network.Secondly,this article proposes a virtual resource management allocation algorithm based on full-duplex relay network.The algorithm first virtualizes the spectrum resources,base stations and relay and models the virtualized resource allocation problem as an optimization problem that is optimized to maximize the total utility of all infrastructure providers.In order to reduce the complexity,the sub-gradient algorithm is adopted to solve the dual problem of the original optimization problem to get the optimal sub-carrier and power allocation scheme.The simulation results show that the virtualized FDR network proposed by combining wireless virtualization and full-duplex relay is feasible,and the degree of freedom obtained by users is higher in the proposed virtual network.Finally,this article proposes a hybrid wireless network virtual resource management allocation algorithm based on hybrid mode.In this algorithm,the total transmission rate of users in FDR networks and HDR networks is given respectively.By comparing their values,a method of relay modes selection is proposed.The suboptimal algorithm is used to solve the optimal relay,subcarrier and power allocation.The simulation results show that the total utility value of infrastructure providers is improved when resource allocation is under mixed mode relaying when the impact of residual self-interference factors is too large.