摘要
在射频供能无线传感器网络中,提高网络能效和吞吐率是一个重要的研究问题.该文统筹考虑信道分配、节点的能量阈值以及MAC(Medium Access Control)帧分块重传机制,提出高能效和高吞吐率的数据收集方案;推导了节点的充电时间、节点传输一个MAC帧的平均能耗和平均时延、网络能效和吞吐率,定义了网络效用函数,形成了最大化网络效用的优化问题.通过调整效用系数并求解优化问题,可以获得使网络能效和吞吐率最大化的最优能量阈值和MAC帧最优分块个数.仿真结果表明,所提方案的能效和吞吐率高于已有方案.
In radio frequency powered wireless sensor network(RFP-WSN),improving network energy efficiency and throughput is an important topic.A data collection scheme with high energy-efficiency and high throughput is proposed in this paper,which integrates channel allocation,energy threshold and MAC(Medium Access Control)frame block-level retransmission mechanism.In addition,the charging time of nodes,the average energy consumption and the average delay for transmitting a MAC frame,and the energy efficiency and throughput of the network are derived.The network utility function is defined,and the optimization problem(OP)of maximizing network utility is formed.By adjusting the utility coefficient and solving the OP,the optimal energy threshold and the optimal number of blocks per MAC frame can be obtained to maximize the energy efficiency and throughput.The simulation results show that the energy efficiency and throughput of the proposed scheme are higher than that of the existing schemes.
作者
邱树伟
石海燕
池凯凯
程珍
朱艺华
QIU Shu-wei;SHI Hai-yan;CHI Kai-kai;CHENG Zhen;ZHU Yi-hua(School of Computer Science and Technology,Zhejiang University of Technology,Hangzhou,Zhejiang 310023,China;;School of Mechanical and Electrical Engineering,Shaoxing University,Shaoxing,Zhejiang 312000,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2018年第9期2238-2244,共7页
Acta Electronica Sinica
基金
国家自然科学基金重点项目(No.61432015)
国家自然科学基金面上项目(No.61772470
No.61472367)
浙江省自然科学基金项目(No.LY15F020029)
关键词
射频供能通信网络
无线传感器网络
数据收集
吞吐率
能效
radio-frequency powered communications network
wireless sensor network
data collection
throughput
energy efficiency
