基于ZigBee技术的农用无线传感器网络体系架构研究

摘要

To meet the requirements in real-time, reliability and sustainability for crop-growth environment monitoring in precision agriculture, the authors of this paper proposed a wireless sensor network architecture for agriculture based on the ZigBee technology, and on the basis of the low-energy adaptive clustering hierarchy (LEACH) algorithm, presented the architecture's new routing strategy applicable to long time environmental monitoring. Thus, the first cluster establishment,broadcast, selection and scheduling were implemented, and the decision to determine whether to join a cluster or as a stand-alone node to corrnunicate directly with the control node was made in accordance with the distance and energy consumption. The simulation results show that the method can achieve real-time collection and remote transnission of farmland temperature, humidity and other information, while reducing the energy consumption in data transmission, extending the network lifetime, and ensuring the agricultural wireless sensor's efficient, stable work.%针对精准农业对农作物生长环境监测应具备实时性、可靠性及可持续性的要求,对无线传感器网络体系架构及路由策略进行了研究.详细描述了基于ZigBee技术的农用无线传感器网络体系架构,并在LEACH算法基础上提出了适用于长时间监测的路由策略,实现了网络簇首节点的建立、广播、选择和调度,并根据能量耗费确定是加入某个簇还是作为一个独立节点直接与控制节点通信.仿真实验结果表明,该算法能够实时采集和远程传输农田温度、湿度等信息,同时能有效减少传感器节点的能耗,延长网络寿命,保证农用无线传感器网络的长时间稳定地工作.