Research On Resource Scheduling Optimization Algorithm For D2D Mobile Users In Cellular Network

With the development of communication technology and the improvement of people's material living standards,the number of users in cellular networks is increasing,resulting in the phenomenon of co-channel interference becoming more and more serious and the system becoming more crowded.During the commercialization of 5G,some new technologies have entered people's vision.In the field of wireless technology,the introduction of Device-to-Device(D2D),ultra-dense networks,new multiple access technologies,full-spectrum access technologies,and MIMO technologies have increased the speed of communication services,expanded the coverage of communication.Using terminal pass-through technology in cellular networks can not only improve spectrum utilization,increase system capacity and expand coverage areas,but also reduce the burden on cellular networks and reduce terminal power consumption.To this end,this paper has conducted an in-depth study on the resource scheduling optimization algorithm for D2 D mobile users in cellular network systems.This paper first introduces the various working modes of D2 D communication in cellular networks and their advantages and disadvantages,and determines the system model studied in this paper.Next,the traditional resource allocation algorithm is analyzed in depth.On this basis,by jointly considering the frequency selection of cellular users and the frequency selection of D2 D users,a resource scheduling algorithm based on the maximum data transmission rate is proposed,which effectively improves the data transmission rate of the system.Then,from the perspective of reducing complexity,a new resource scheduling algorithm based on position relationship is proposed.The simulation results verify the feasibility of the resource scheduling algorithm based on position relationship.The algorithm complexity is greatly reduced,and the performance good.Finally,further study the location relationship of users,analyze the common situation caused by user movement,design the priority of different users in access disconnection,and propose CT stability tolerance and DT stability tolerance to measure the stability of the system,Further proposed an optimization algorithm based on user mobility.Theoretical analysis and simulation results show that,compared with the resource scheduling algorithm based on the maximum data transmission rate,its system capacity has been greatly improved,and the system has good stability.