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 powered.Our 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 requirements.In contrast to existing literature on energy harvesting system which only considers the radio transmission power,we take the static circuit power into account as well.We formulate the EE optimization problem and prove that the EE of the BS and relay are both quasiconvex in the instantaneous transmission rate.Then 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 used.The simulation results demonstrate that EERA may achieve good energy saving effects.We 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.
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 powered.Our 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 requirements.In contrast to existing literature on energy harvesting system which only considers the radio transmission power,we take the static circuit power into account as well.We formulate the EE optimization problem and prove that the EE of the BS and relay are both quasiconvex in the instantaneous transmission rate.Then 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 used.The simulation results demonstrate that EERA may achieve good energy saving effects.We 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.
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)
作者简介
ZHAO Fling, received the B.E. and M.E. degrees from the University of Science and Technology of China （USTC）, Hefei, China, in 1999 and 2002, respectively. He is currently a Lecturer with the Department of Electronic Engineering and Information Science, USTC. His research interests include energy efficient network management, energy-efficient resource allocation and relay technology.ZHAO Jing, received the B.Sc. degree from Hefei University of technology, Hefei, China, in 2012. She is currently working toward the M.S. degree with the Department of Electronic Engineering and Information Science, University of Science and Technology of China （USTC）, Hefei, China. Since 2012, she has been with the Personal Communication Network and Spectrum Spreading Laboratory, USTC. Her research interests include energy harvesting communication systems, wireless relay networks, and green communication.ZHOU Wuyang, received the B.Sc. and M.S. degrees from Xidian University, Xi＇an, China, in 1993 and 1996, respectively, and the Ph.D. degree from the University of Science and Technology of China, Hefei, China, in 2000. He is currently a Professor of wire- less communication networks with the Department of Electronic Engineering and Information Science, USTC. He participated in the National 863 Research Project Beyond Third Generation of Mobile System in China （FUTURE Plan） and has been a Task Director in many projects, including Innovative Wireless Campus Experimental Networks Research on High Frequency Networking Technologies, and Research on Trans- mission and Networking Technologies in Satellite Mobile Communications. His current research interests include green technologies for communication systems, satellite mobile communications, and underwater acoustic communications.ZHU Jinkang, received the B.E. degree from the Radio Department, Sichuan University, Sichuan, China, in 1966. Since 1982, he has been a Professor with the Department of EELS, USTC, and the Director of Personal Communication Network and Spread Spectrum Laboratory of the same university. His current research focuses on distributed technology for future mobile communications, multi-user protocol of wireless and mobile networks, and signal process method of wireless and mobile communications. Mr. Zhu has been China delegate of Mobile Communication Forum of Asia-Pacific Region from 1992 to 2000. He also has been Member of the Technical Program Committee of IEEE VTC＇99, IEEE VTC＇00, IEEE VTC＇01,1EEE VTC＇02, IEEE VTC＇04, and IEEE ISIC＇01-03.ZHANG Sihoi, received the B.Sc. degree from the Ocean University of China, Qingdao, China, in 1996 and the M.S. and Ph.D. degrees from the University of Science and Technology of China （USTC）, Hefei, China, in 2002 and 2006, respectively. He is current- ly an Assistant Professor of electronic engineering with the Department of Electronic Engineering and Information Science, USTC where, since 2009, he has been with the Personal Communication Network and Spectrum Spreading Laboratory. He has participated in many projects, including Innovative Wireless Cam- pus Experimental Networks, Research on High Fre- quency Networking Technologies, and Research on Transmission and Networking Technologies in Satel- lite Mobile Communications. His research interests include wireless communication, opportunistic net-works, and intelligent algorithms. The corresponding author Email： shzhang@ustc.edu.cn
