Research On Resource Allocation Of Ultra Dense Networks Based On Virtualization

With the rapid development of mobile Internet,the amount of business data in the communication network is exploding.In order to guarantee the service rate demand of the users and improve the service quality of the communication network,the industry has proposed an ultra-dense networks as one of the key technologies to meet the 1000 times growth rate of the future 5G communication network data.Ultra-dense networks through the small base station intensive deployment,improve the power efficiency and spectral efficiency,in order to achieve a substantial increase in system capacity.However,the intensive deployment of the base station also brings many problems such as the complexity of the network topology.The interference management becomes more difficult and restricts the performance of the system than the traditional cellular network.Efficient.radio resource allocation can effectively avoid the interference between the base stations,improve network performance.Therefore,it is of great theoretical significance to study the resource allocation of ultra-dense networks.Firstly,in order to realize the flexible unified management and on-demand allocation of ultra-dense networks radio resources,this paper presents a virtualized ultra-dense networks radio resource management architecture,and describes in detail the composition of the architecture and the part of the function.Secondly,the allocation of virtual radio resources is realized on the basis of the proposed architecture.This paper proposes a virtual wireless resource allocation strategy based on resource reservation for the problem of low resource utilization rate caused by real-time allocation of resources.This strategy is composed of virtual radio resource demand forecasting and virtual radio resource allocation.For the virtual radio resource demand forecasting,this paper is realized by Markov model.Aiming at the allocation of virtual radio resources,this paper designs a utility function based on idle density,and maximizes the allocation of virtual radio resources by maximizing the utility function.The simulation results show that the proposed strategy can effectively improve the utilization rate of virtual radio resources and reduce the rejection rate of user requests.Finally,this paper summarizes the constraints of virtual radio resource mapping.Combined with coordinated multiple points transmission/reception can achieve the characteristics of multiple base stations transmitting data at the same time,a method based on joint transmission technology virtual radio resource mapping policy.The simulation results show that the proposed strategy can effectively improve the user throughput and spectrum efficiency.