基于广义时间同步的无线传感器节点休眠机制  

Sleeping mechanism of wireless sensor nodes based on generalized time synchronization

作　　者：徐振峰[1] 李刚[1] 陈俊杰[1,2] 

机构地区：[1]东南大学仪器科学与工程学院,南京210096 [2]东南大学常州研究院,常州213164

出　　处：《华中科技大学学报（自然科学版）》2013年第S1期196-199,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：江苏省科技支撑计划资助项目(BE2011340);江苏省自然科学基金资助项目(BK2010196);2012年度江苏省工业和信息产业转型升级专项引导基金资助项目

摘　　要：针对许多应用领域中被测对象变化缓慢,提出了广义时间同步的概念,详细分析了广义时间同步成立的条件以及数据重发次数对网络通信质量的影响,阐述了基于广义时间同步的无线传感器节点的休眠机制,并将该机制应用于温室无线监测网络.分析及实验结果表明:数据重发次数不小于4次时可以确保很好的通信质量,在相同时间内节点处于工作/休眠模式下的功耗约为发射/空闲模式下的1/10左右.Because tested parameters of objects in many monitoring domains vary slowly,the concept of generalized time synchronization was proposed.The establishing conditions of generalized time synchronization and the influence of data retransmission number to communication quality of wireless networks were analyzed in details.Sleep mechanism of wireless sensor nodes based on generalized time synchronization was illustrated,and adopted in a wireless monitoring network of greenhouse.Analytical and experimental results show that high communication quality can be guaranteed if data retransmission number is no less than 4.Energy consumption of nodes in work/sleep mode can be reduced to 1/10of that in transmission/idle mode during the same time interval.

关 键 词：无线传感器网络 同步 传输延时 休眠机制 低功耗 通信质量 

分 类 号：TN929.5[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]