Energy efficiency optimization of relay-assisted D2D two-way communications with SWIPT  

作　　者：HE Jiai CHEN Yanjiao WANG Tong 何继爱;CHEN Yanjiao;WANG Tong(School of Computer and Communication,Lanzhou University of Technology,Lanzhou 730050,P.R.China)

机构地区：[1]School of Computer and Communication,Lanzhou University of Technology,Lanzhou 730050,P.R.China

出　　处：《High Technology Letters》2022年第3期252-258,共7页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.61561031)。

摘　　要：Aiming at the energy consumption of long-distance device-to-device(D2D) devices for two-way communications in a cellular network,this paper proposes a strategy that combines two-way relay technology(TWRT) and simultaneous wireless information and power transfer(SWIPT) technology to achieve high energy efficiency(EE) communication.The scheme first establishes a fractional programming problem to maximize EE of D2D,and transforms it into a non-fractional optimization problem that can be solved easily.Then the problem is divided into three sub-problems:power control,power splitting ratios optimization,and relay selection.In order to maximize EE of the D2D pair,the Dinkelbach iterative algorithm is used to optimize the transmitted power of two D2D devices simultaneously;the one-dimensional search algorithm is proposed to optimize power splitting ratios;an improved optimal relay selection scheme based on EE is proposed to select relay.Finally,experiments are carried out on the Matlab simulation platform.The simulation results show that the proposed algorithm has faster convergence.Compared with the one-way relay transmission and fixed relay algorithms,the proposed scheme has higher EE.

关 键 词：device-to-device(D2D) energy efficiency(EE) simultaneous wireless information and power transfer(SWIPT) two-way communications power control relay selection 

分 类 号：TN929.5[电子电信—通信与信息系统]