面向能耗控制的无线传感器网络节点协议优化

Protocol Optimization for Energy Consumption Control in Wireless Sensor Networks

能量受限是无线传感器网络一个显著的特征。对网络进行能耗优化并延长网络生命周期是无线传感器网络研究的重点。提出了面向能耗控制的无线传感器网络节点协议优化方法。针对网络中数据发送所占较大的能耗比重,通过对协议优化,对发送功率的参数设置方法进行改进,改变以往发射功率的固定参数设置法,通过终端节点之间的距离动态调整发送功率的方法,以达到节省能耗并延长网络生命周期的目的。仿真和实验结果表明,改进后的发射功率动态参数设置法较改进之前的固定参数设置方法能更多地节约网络能耗。

Energy restriction is a remarkable characteristic in wireless sensor networks （WSNs）.Most of the works in the study of wireless sensor networks focuses on the optimization of energy consumption and prolonging the network life. Therefore, a method of protocol optimization for energy consumption control is presented in this paper.Considering that the sending of packets occupies larger proportion of energy consumption, the method of parameter setting on the transmission power is improved. Compared with the previous method of fixed parameter setting,this method eanadjust dynamically the parameters of sending power according to the distance between the terminal nodes to reduce energy consumption and prolong the network life. Simulation and experimental results show that the improved method of dynamic parameter setting can significantly reduce the energy consumption of the network, compared with the method of fixed parameter setting.