Research On Interference Coordination Scheme Of 5G Dense Network

Since the emergence of mobile communication technology,it has experienced analog signal transmission(1G),digital modulation transmission GSM(2G),cellular mobile communication technology(3G),fourth generation digital cellular mobile communication technology(4G).Now,5G technology of Internet of all things has begun to be used commercially.It will break through the shackles of 4G mobile communication technology,break through the limitation of time and space,and bring users a real information feast.However,the development of 5G technology inevitably faces various problems brought by system capacity and network interference,which are also the key factors restricting the further development of 5G technology.This thesis mainly studies the problem of interference coordination in 5G dense network.By comparing the two schemes,an interference coordination scheme is designed to enhance the anti-interference ability of 5G dense network and improve the performance of 5G network.The main contents of this thesis are as follows:(1)By reading the relevant literature,this thesis expounds the development process of 5G intensive network technology.Based on the analysis of the research status of interference coordination in the context of small cell and D2 D communication,the interference coordination scheme in the dense network is determined as the main research object of this thesis.Secondly,it mainly analyzes the interference problem of wireless access network in 5G dense network and the interference effect caused by network intensive,and lists several interference scenarios in the form of charts.Finally,it studies the typical interference management methods including interference coordination and interference alignment;(2)In 5G dense network scenario,the random interference coordination scheme is compared with the topology based interference coordination scheme.After the scene model building and scheme performance analysis,the two schemes are modeled and simulated respectively,and the simulation results are compared and analyzed.The simulation results show that with the increase of density ratio,the interference coordination scheme based on topology has a certain improvement in average user data rate and signal-to-noise ratio,which proves that the interference coordination scheme based on topology is better than the random interference coordination scheme in the coordination communication system;(3)Based on the comparison of the previous group of schemes,this thesis proposes two specific interference coordination schemes based on topology,i.e.incomplete coloring interferencecoordination scheme and dynamic coloring interference coordination scheme,and models and simulates the two schemes respectively.In the simulation results of incomplete coloring interference coordination scheme,it can not only determine the interference threshold for maximum system performance,but also perform better than the other two traditional schemes when the communication load and the number of small base stations are changed.In view of the simplicity of the scene model,a user-oriented dynamic coloring interference coordination scheme is proposed in this thesis.From the simulation results,we can see that the dynamic coloring interference coordination scheme leads in average user throughput,spectrum utilization and fairness.The interference coordination scheme for 5G dense network studied in this thesis,that is,the interference coordination scheme based on incomplete coloring and dynamic coloring can improve the anti-interference performance of 5G dense network.In contrast,the interference coordination scheme based on dynamic coloring can improve the network performance more obviously,which has certain significance for solving the interference problem of 5G dense network.