异构网络下基于全网吞吐量最优的多用户D2D模式选择算法

2D (Device-to-Device) technology is a kind of new technology that allows to reuse cellfrequency resources to conduct an end-to-end direct communication.In order to ensure the communicationquality of the original userunderheterogeneous network, the multi-user can selectthe model simultaneously. Under the premise of underlying to ensure thecommunication quality of the original user, the maximizationof D2D user'sSINR is taken as the principle to propose the power distribution of D2D usersin three kinds of communication models(reuse, exclusive use and cellular) when the originalnetwork users use or unuse the relaying to conduct cellular communication in this paper, and then based on the highest principle of entire network throughput, the weighted bipartite graph maximum matching algorithm is used to achieve the mode selection algorithm of multi-user global optimum.Simulation analyzes themultiple D2D users' law that models changed with the D2D user's maximum distanceunder the condition of a large or small number of micro networkusers.Simulation shows thatthis algorithm effectively improves the total throughput of entire network usersunder different background as compared to the international mainstream algorithm in recent years.