An Energy-Efficient Scheme for Multirelay Cooperative Networks with Energy Harvesting

被引：3

作者：

Yang, Dingcheng ^{[1
]}

Zhu, Chuanqi ^{[1
]}

Xiao, Lin ^{[1
]}

Shen, Xiaomei ^{[2
]}

Zhang, Tiankui ^{[2
]}

机构：

[1] Nanchang Univ, Informat Engn Sch, Nanchang 330031, Jiangxi, Peoples R China

[2] Beijing Univ Posts & Telecommun, Beijing, Peoples R China

来源：

MOBILE INFORMATION SYSTEMS | 2016年 / 2016卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

POWER ALLOCATION; RELAY SELECTION; CHANNELS;

D O I：

10.1155/2016/5618935

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This study investigates an energy-efficient scheme in multirelay cooperative networks with energy harvesting where multiple sessions need to communicate with each other via the relay node. A two-step optimal method is proposed which maximizes the system energy efficiency, while taking into account the receiver circuit energy consumption. Firstly, the optimal power allocation for relay nodes is determined to maximize the system throughput; this is based on directional water-filling algorithm. Secondly, using quantum particle swarm optimization (QPSO), a joint relay node selection and session grouping optimization is proposed. With this algorithm, sessions can be classified into multiple groups that are assisted by the specific relay node with the maximum energy efficiency. This approach leads to a better global optimization in searching ability and efficiency. Simulation results show that the proposed scheme can improve the energy efficiency effectively compared with direct transmission and opportunistic relay-selected cooperative transmission.

引用

页数：10

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