大规模农田传感器网络通信能耗模型

Communication Energy Model for Large Scale Fields Sensor Networks

将无线传感器网络应用于农业中,构成农田监控网络,是实现农业信息化、自动化、智能化的重要手段。然而,农田无线传感器网络具有超大规模、超低成本、拓扑变化复杂等特点,这些特征对网络通信设计提出了更加苛刻的要求。从Heinzelman的无线传输能量模型出发,建立了一个适用于大规模农田传感器网络的通信能耗模型,该能量模型考虑了部署间距、传输半径以及数据包大小对系统总能耗的影响,获得了在传输间距x确定情况下,求最佳传输半径R的计算方法。同时,仿真分析了不同部署半径、不同网络规模对全网查询能耗的影响。

It is an important technique to achieve agricultural informationization, automatization and intelligentize that wireless sensor networks is used in agriculture as a monitoring network. Farmland wireless sensor network has the characteristics of ultra-large-scale, ultra-low-cost and complex topological changing which brings the network protocol rigorous requirements. In this paper, a communication energy model for large-scale fields＇sensor network was proposed based on Heinzelman＇ s energy model, which takes the interaction with disposal space distance, transmission semi-diameter, packet size as well as the impact of components into account. Furthermore, a math method to calculate best trans-mission semi-diameter was presented while the disposal space distance was given. And then, the important factors of the disposal space distance and network scale in the model effect query energy consumption were attained by fitting the simulation results.