无线传感器网络的低功耗研究

Research on low energy consuming wireless sensor netwoks

在野外等一些环境下的无线数据采集系统中,由于地理环境恶劣、节点数量多等原因很难更换电源电池,因此有效地降低系统各层的功耗、提高系统的生命周期尤为重要。文中在论述传感器节点结构的基础上,分析如何对传感器节点的动态电压调度、MCU能量消耗控制、动态功率管理、收发模块节能等硬件电路以及对MAC层、网络层的软件协议降低系统耗能。

In outdoor environment,the power source cell of wireless data acquisition system is very difficult to be replaced,because of the bad geographical circumstance and lot of nodes and so on,so that it is especially significant to cut down each layer energy consuming of the system effectively and to improve the system life cycle.Base on sensor nodes structure discussion,this paper analyzes the method to reduce energy consuming by dynamic voltage dispatch of sensor node,MCU(micro controller unit) energy consumption controlling,dynamic power management,energy saving of hardware electric circuits as receiving and launching module MAC layer,network layer software protocol etc.