Energy Efficiency Optimization in Relay-Assisted Networks with Energy Harvesting Relay Constraints

作     者：ZHAO Ming ZHAO Jing ZHOU Wuyang ZHU Jinkang ZHANG Sihai 

作者机构：Key Laboratory of Wireless-Optical CommunicationsChinese Academy of SciencesUniversity of Science and Technology of China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2015年第12卷第2期

页      面：84-94页

核心收录：

学科分类：0810[工学-信息与通信工程] 080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0839[工学-网络空间安全] 08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by National programs for High Technology Research and Development(2012AA011402) National Basic Research Program of China(2012CB316002) National Nature Science Foundation of China(61172088) 

主　　题：energy efficiency energy harvesting relay sleep mode 

摘      要：In this paper we consider data transmission in a decode-and-forward(DF)relay-assisted network in which the relay is energy harvesting(EH) powered while the base station(BS) is power-grid *** purpose is to maximize the BS s energy efficiency(EE) while making full use of the relay s renewable energy and satisfying the specific average throughput *** contrast to existing literature on energy harvesting system which only considers the radio transmission power,we take the static circuit power into account as *** formulate the EE optimization problem and prove that the EE of the BS and relay are both quasiconvex in the instantaneous transmission *** we divide the complex optimization problem into two point-to-point link level optimization parts and propose an energyefficient resource allocation(EERA) scheme in which power control and sleep mode management are jointly *** simulation results demonstrate that EERA may achieve good energy saving *** also compare the EE of an energy harvesting relay system with a power-grid powered one and provide more insight into the EE problem of energy harvesting relay system.