一种射频能量捕获网络移动能量源均衡化充电策略

doi:10.3969/j.issn.0372-2112.2018.12.023

电子学报 ›› 2018, Vol. 46 ›› Issue (12): 2985-2992.DOI: 10.3969/j.issn.0372-2112.2018.12.023

一种射频能量捕获网络移动能量源均衡化充电策略

田贤忠¹, 祝驿楠^1,2, 何佳存¹, 郭敏¹, 刘高¹

1. 浙江工业大学计算机科学与技术学院, 浙江杭州 310023;
2. 浙江工业大学健行学院, 浙江杭州 310023

收稿日期:2017-09-15 修回日期:2018-05-24 出版日期:2018-12-25
- 作者简介:
- 田贤忠 男,1968年生于浙江杭州,博士,现为浙江工业大学计算机学院教授,当前的研究方向包括能量捕获无线传感器网络、网络编码、移动计算、无线网络协议优化等.E-mail:txz@zjut.edu.cn;祝驿楠 男,1997年出生于浙江杭州,现为浙江工业大学计算机学院本科生,研究方向包括可充电传感器网络、无线自组织网络等.E-mail:hezzyn1997@163.com;何佳存 男,1992年出生于浙江金华,2015年于浙江工业大学获得学士学位,现为浙江工业大学计算机学院研究生,研究方向包括可充电传感器网络、移动收集数据策略等.E-mail:372044849@qq.com;郭敏男,1992年生于浙江东阳,现为浙江工业大学计算机学院研究生,研究方向包括可充电传感器网络、无线协助中继网络等.E-mail:348036307@qq.com;刘高男,1991年出生于湖北洪湖,现为浙江工业大学计算机学院研究生,研究方向包括可充电传感器网络、无源感知网络等.E-mail:liugaozy@163.com
- 基金资助:
- 国家自然科学基金 (No.61672465，No.61772472）; 浙江省自然科学基金 (No.LY15F020027，No.LY17F020020）

A Balanced Charging Scheme for Mobile Energy Transmitter in RF Energy Harvesting Network

TIAN Xian-zhong¹, ZHU Yi-nan^1,2, HE Jia-cun¹, GUO Min¹, LIU Gao¹

1.College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310023, China;
2.Jianxing Honors College, Zhejiang University of Technology, Hangzhou, Zhejiang 310023, China

Received:2017-09-15 Revised:2018-05-24 Online:2018-12-25 Published:2018-12-25

摘要/Abstract

摘要： 为解决传统电池供电传感器网络存在的电池不易更换、节点能量容易耗尽等问题，射频能量捕获技术已逐步应用于无线可充电传感器网络中.由于不同位置传感器节点的工作负荷不同，捕获能量也有差异，实现节点能量的均衡化分布可以有效地提高节点的存活率.考虑射频能量源移动充电的场景，在已知节点位置信息的条件下，设计合理均衡的路由方案和充电算法.首先将区域基于蜂窝六边形网格划分，分别对网格和节点分层，提出逐层传输的均衡式路由策略，然后给出无线充电小车的移动路径，对相邻两层内节点剩余能量的方差最小化问题建模，由内层向外层依次确定能量源在各停留点的充电时间.仿真结果表明，相比已有的均衡化充电方法，该策略可以明显提高节点剩余能量的均衡性，从而延长网络的生命周期.

关键词: 射频能量捕获, 无线传感器网络, 能量均衡, 无线充电

Abstract: In order to solve the problems existing in the traditional battery-powered sensor network that the battery is not available to replace and the energy of nodes is easy to be exhausted, RF energy harvesting technology has been applied to the wireless rechargeable sensor network. Since the workload and harvested energy of sensor nodes in different positions are different, balanced distribution of nodes' energy can effectively improve the survival rate of nodes. Considering the scenario where mobile RF energy transmitter is employed for charging, we design a reasonable balanced routing scheme and charging algorithm under the conditions of known nodes' location information. First, the network area is discretized based on the cellular hexagonal grid where the grids and nodes are stratified respectively. A balanced routing scheme of hierarchical data transmission is proposed. Then we formulate mathematic model with pre-defined energy transmitter's moving path to minimize the variance of the nodes' residual energy in the adjacent two layers and derive the charging time at different charging spots from the inner layer to the outer layer. Simulation results reveal that compared with the existing balanced charging method, our proposed algorithm can significantly improve the balance of node's residual energy and prolong the network lifetime.

Key words: RF energy harvesting, wireless sensor network, nodes' energy equalization, wireless charging

中图分类号:

TN911

田贤忠, 祝驿楠, 何佳存, 郭敏, 刘高. 一种射频能量捕获网络移动能量源均衡化充电策略[J]. 电子学报, 2018, 46(12): 2985-2992.

TIAN Xian-zhong, ZHU Yi-nan, HE Jia-cun, GUO Min, LIU Gao. A Balanced Charging Scheme for Mobile Energy Transmitter in RF Energy Harvesting Network[J]. Acta Electronica Sinica, 2018, 46(12): 2985-2992.

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一种射频能量捕获网络移动能量源均衡化充电策略

A Balanced Charging Scheme for Mobile Energy Transmitter in RF Energy Harvesting Network

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