Research On Power Control Technology Based On LTE-A Heterogeneous Network

In recent years,with the rapid development of the Internet,the Internet of Things,and the ubiquitous mobile devices,the demand for high-speed and low-latency wireless connections have experienced unprecedented growth,and communication technology is facing more severe challenges.Heterogeneous network as a promising way of deployment has been got extensive attention by all aspects.However,different access technologies in heterogeneous networks and the deployment of different network structures bring more interference problems.Therefore,interference management technology is one of the most critical technologies in heterogeneous network research.First of all,according to the challenges of the future development of mobile communication technology,this paper has done an in-depth study of interference management technology in power control technology by the analysis of LTE-A heterogeneous network development prospects and key technologies,so that in different network layer to improve the communication rate and ensure the user's quality of service.Secondly,in the research of power control technology,hybrid power control model which is suitable for heterogeneous network and has high-performance self-adapting parameters is adopted in this paper.Based on the theory of game theory,the power control algorithm is presented.However,the method of Nash equilibrium is not optimal.Therefore,based on the improvement of Nash equilibrium,a distributed hybrid power control algorithm is proposed to control the power.The algorithm uses the Stankelberg game theory to make the macrocell users as the game leader and the femtocell users as the follower of the game,and propose the distributed hybrid power control algorithm based on price and power by power consumption pricing.In this algorithm,macrocell users apply non-cooperative game theory to maximize their utility.In this paper,it is proved that the simulation results show that compared with Nash equilibrium,Stankelberg game method can converge faster,transmit less power,and can effectively reduce interference,to ensure fairness,and better guarantee the quality of service users.Then,In order to further study the power control technology,a better analysis of Nash equilibrium game and Stankelberg game,this paper also introduces the concept of Pareto efficiency in game theory,through the hybrid power control and Pareto efficiency which does not make any participant's utility improve under the condition that any participant is not bad,proposed the Pareto boundary algorithm,as well as the Nash equilibrium game algorithm and Stankelberg game algorithm.The Pareto boundary is formed under the optimal conditions,and the distributions of the two methods under the Pareto boundary are calculated respectively according to the Nash equilibrium game algorithm and the Stankelberg game algorithm.In the Pareto efficiency game,the simulation results depict the Pareto boundary,as well as the Nash equilibrium and Stankelberg equilibrium distribution,the results show that Stankelberg equilibrium distribution in the Pareto boundary,is effective result,that is,relatively fair,the best allocation,to achieve the best results.At last,this paper summarizes the whole thesis and points out the problems that need to be solved and consummated and the work that needs further development.