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DRAD:一种基于异步休眠调度的无线传感器网络数据收集协议
引用本文:刘微姗,陈晓江,段任,陈文娟,刘晨,房鼎益.DRAD:一种基于异步休眠调度的无线传感器网络数据收集协议[J].计算机工程与科学,2010,32(11):40-43.
作者姓名:刘微姗  陈晓江  段任  陈文娟  刘晨  房鼎益
作者单位:西北大学信息科学与技术学院,陕西,西安,710127
基金项目:陕西省科技攻关项目,陕西省自然科学基础研究计划项目,陕西省教育厅自然科学专项项目,西北大学研究生自主创新项目
摘    要:数据收集是无线传感器网络的基本功能之一,被大量应用到环境监测。如何降低网络能耗、延长网络生命周期是环境监测中数据收集的首要问题。大多数应用都选择使用休眠调度,通过监听空闲侦听的时间来节省能量,而这通常是在MAC层进行。本文则在网络层路由中考虑休眠调度的影响,将路由和休眠调度综合起来考虑,提出了一种基于异步休眠调度的无线传感器网络数据收集协议DRAD。DRAD通过异步休眠调度避免了时间同步的消耗,节点只需维护与邻居节点间的时间差,通过顺带时间差修正机制解决时间偏移问题,降低了能量开销。实验用占空比来衡量系统能量消耗,结果显示DRAD可以稳定在预先设定的占空比,有效降低网络能耗,延长网络寿命。

关 键 词:无线传感器网络  数据收集  异步休眠调度  时间差修正
收稿时间:2010-07-13
修稿时间:2010-09-10

DRAD:A Data Collection Algorithm Based on Asynchronous Duty-Cycle in Wireless Sensor Networks
LIU Wei-shan,CHEN Xiao-jiang,DUAN Ren,CHEN Wen-juan,LIU Chen,FANG Ding-yi.DRAD:A Data Collection Algorithm Based on Asynchronous Duty-Cycle in Wireless Sensor Networks[J].Computer Engineering & Science,2010,32(11):40-43.
Authors:LIU Wei-shan  CHEN Xiao-jiang  DUAN Ren  CHEN Wen-juan  LIU Chen  FANG Ding-yi
Affiliation:(School of Information Science and Technology,Northwest University,Xi’an 710127,China)
Abstract:Data collection is one of the basic functions of wireless sensor networks and has been applied to environmental monitoring. How to reduce power consumption and prolong the network lifetime is the frontier issue. This paper proposes DRAD, a data collection routing algorithm based on asynchronous duty cycle in wireless sensor networks. The asynchronous duty cycle avoids the consumption caused by time synchronization. Nodes only maintain the time differences from neighbors. So the network lifetime can be significantly prolonged through the asynchronous duty cycle. The duty cycles is used to measure energy consumption in experiments. The results show that DRAD performs in a stable range of low duty cycles and is effective in minimizing energy consumption and prolonging network lifetime.
Keywords:wireless sensor networks  data collection  asynchronous duty cycle  time difference modification
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