Research On D2D Communication Technology Based On Energy Harvesting And Wireless Charging Network

D2D communication means direct communication between devices,it doesn't have to be forwarded through the base station and meets higher rate requirements,but it also leads to high energy consumption.At the same time,in order to avoid the interference caused by multiple D2 D users reusing the same uplink resources,an energy harvesting based clustering scheme called EH-DILA is introduced in this paper.Users can harvest energy from the surrounding environment first,then the users satisfying the energy threshold are divided into clusters according to the interference limited area.Users in the same cluster reuse the same resource blocks,and the interference between users in the same cluster is very small,thus high energy consumption and interference problem can be relieved.Compared with the traditional clustering scheme,simulation analysis shows that the scheme proposed in this paper will effectively improve the service rate of D2 D and enhance the throughput of D2 D users in information transmission phase.The energy harvesting method adopted in EH-DILA scheme is inefficient and unstable.To solve this problem,this paper proposes a user bidirectional selection scheme based on energy relay devices,called ER-BUSC scheme.In ER-BUSC scheme,some cellular users are regarded as energy relay devices,a bidirectional selection method is used to achieve one-to-one matching between D2 D users and energy relay devices,base station then charge remote D2 D users wirelessly via energy relay devices,thus the problem of limited energy harvesting efficiency is solved.Compared with traditional single-hop energy harvesting scheme,simulation analysis shows that ER-BUSC scheme will effectively improve the energy harvesting efficiency of users and enhance the throughput of D2 D users in information transmission phase.