无线传感器网络S-MAC协议能量有效性改进  

Improvement of energy efficiency in S-MAC protocol for wireless sensor networks

作　　者：刘经纬[1] 郝福珍[1] 鄢楚平[1] 

机构地区：[1]华北计算技术研究所,北京100083

出　　处：《计算机工程与设计》2007年第10期2344-2347,共4页Computer Engineering and Design

摘　　要：针对无线传感器网络中节点能量受限的特点,对目前典型的无线传感器网络信道接入协议(S-MAC)的休眠机制进行了改进。改进后的协议(ES-MAC)根据传感/转发事件发生间隔的变化而自适应调整各节点的休眠时长以节省空闲监听的能量消耗,从而延长整个网络的生存时间。仿真结果表明,在传感/转发事件发生间隔较长的情况下,改进后的协议能够很好地工作,并提高了原协议的能量有效性。The sleep mechanism of the representative S-MAC protocol is improved due to the energy-constrained issue in wireless sensor networks. In the new protocol, the sleep time of the nodes is adjusted according to the change of the detecting interval and forwarding interval to save the energy consumption in listening to an idle channel and the lifetime of the whole network is extended, Simulation results show that the new protocol runs well and the better energy efficiency is achieved in the case of the longer detecting interval and forwarding interval.

关 键 词：能量消耗 休眠时长 S-MAC协议 ES-MAC协议 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]