Research On D2D Communication Energy Harvesting Mechanism And Resource Reuse Technology

The rapid growth in the number of mobile Internet users has led to a proliferation of new applications and services.The increasing number of terminals,services and the network traffic will undoubtedly have a serious impact on the current status of limited spectrum resources.D2 D Communications as an integral part of the future 5G standard,aimed to increase system capacity,spectrum efficiency,and coverage by enabling direct communication between devices with minimal input from base stations in cellular networks.D2D communication enhances the system spectrum utilization,but the interference can not be ignored.This thesis optimizes the issue of unfair resource distribution caused by D2 D multiplexing resources in cellular systems.In order to ensure the quality of service for cellular users and D2 D users,it is necessary to improve the fairness of the spectrum resources used by the system.In this thesis,an Improved Proportional Fairness interference control scheme is proposed.The scheme not only optimizes the throughput of the system by adjusting the transmit power of the users,but also optimizes the fair service for all users.Simulation results show that IMPF scheme can effectively improve the overall fairness of the cellular system and increase the throughput of edge users compared with the traditional scheme of cellular resource allocation.The thesis also introduces energy harvesting technology into heterogeneous cellular D2 D networks in view of the limited battery capacity of communication equipment and then proposes an EMA scheme based on energy harvesting.This scheme firstly determines whether the rechargeable device meets the battery capacity threshold for normal communication,and then perceives the matching object set with the distance constraint between devices.Then,maximize the total system throughput as the goal,subject to maximum power and charging capacity together for constraints to achieve the power control.Finally,it improves the proportion of fair scheduling strategy for the allocation of multiplexed resources.The simulation results show that the EMA greatly improves the equipment standby time and effectively protects the fairness of resources allocated by cellular subscribers.Meanwhile,it also ensures the overall throughput of the all system.