Research On Power Control Algorithm Of Two-tier Network Based On Game Theory

With the development of wireless communication technology and mobile Internet,mobile business application scenarios is much complex than ever,now more and more mobile communication services appear indoor.Mobile base is unable to solve those difficulties.Femtocell is a small indoor base station which can effectively improve the indoor mobile cellular network communication quality,a two-tier network with the original base station,but due to its location and amount of randomness,two-tier network power control is the most difficult problem,power control technology has become more and more important.This paper studies the power control problem of two-tier network,which based on the game theory,then we analyze the basic power control algorithms under the single network,and verified the differences of NPG and NPGP algorithm,explains the role of price function in power game in the algorithm;then,in the Femtocell two-tier network architecture,we optimizate power control algorithm,by adding the link protection technology of the macrocell,which reduced Femtocell excessive interference to macrocell.Not only that we increase the strategy choice to the power control process,which improves the algorithm convergence speed and enhances the robustness of the algorithm.We use MATLAB simulation tool to simulate the single-layer network model,analyzes the basic algorithm of power control based on game theory,and compiles interactive simulation program,and then establishes a system with one macrocell and a certain number of Femtocell components.The simulation results show that our algorithm converges faster,and can guarantee the minimum communication requirements of the macrocell users,and can also maximize the energy utilization in the system.