Research On Resource Allocation Algorithm Based On C-RAN Network Architecture

With the exponential growth of user traffic,the traditional access network architecture has failed to meet the higher requirements of speed,delay,mobility cost and spectrum efficiency in the development of modern society,which triggered the demand for new network architecture design.Cloud Radio Access Network(C-RAN)is the case in this case.C-RAN is a green wireless access network architecture based on centralized processing,collaborative radio and real-time cloud computing architecture.C-RAN not only improves the traditional network construction,reduces the number of base stations,reduces energy consumption,and has centralized processing capabilities,So that we can make efficient use of the spectrum resources in the network according to the cell service load and the quality of service(QoS)needs of users,so that the computing resources of energy resources become feasible.Under this background,this dissertation starts with the overall architecture of C-RAN,mainly considers the spectrum resources and the energy efficiency of the system,studies the related problems of resource allocation,and proposes corresponding strategies.details as follows:From the perspective of spectrum resources,this study is based on the research of spectrum resource allocation scheme under C-RAN network architecture.Considering the changes of user traffic load in different areas of a cell,a method of assigning dynamic spectrum resources based on graph coloring is proposed.The simulation results show that compared with the other two reference schemes,the proposed spectrum resource allocation mechanism effectively improves the spectrum utilization efficiency in the network.From the energy efficiency point of view,this study is based on the heterogeneous C-RAN network infrastructure under the baseband resource pool energy efficiency issues.Under the C-RAN network architecture,to minimize the energy consumption of the baseband resource pool,the base station cluster of the Remote Radio Head(RRH)is divided first,and then combined with the Baseband Unit(BBU)scheduling resource allocation scheme to form a joint resource scheduling scheme.The simulation results show that the scheme which we proposed can reduce the energy consumption of the baseband resource pool while minimizing the operating state of the BBUs.