摘要
综合考虑了无线传感器网络中时间同步过程中时间误差的来源,为了解决一般同步方法中普遍存在的信息开销量大的问题,提出了一种基于一次信息交换,通过簇头对各节点进行时间补偿来维持整个簇内节点同步的方法。该方法在簇头与各簇内节点进行一次成对同步之后,通过簇头对各节点时间偏差进行有效估计后进行补偿来维持同步时间精度。通过仿真实验,该方法在信息开销和同步精度上具有良好的性能。
Comprehensive considering of the time synchronization error sources in Wireless Sensor Network（WSN）,to solve the problem of huge message cost in most time synchronization methods, the approach which is based on one-time message exchanging is proposed.The approach maintains the synchronization precision through the time drift compensation computed by the cluster head after the onetime pair-synchronization between the cluster head and the members.The simulation results show that the approach performances well on the message cost and synchronization precision.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第6期99-101,180,共4页
Computer Engineering and Applications
关键词
无线传感器网络
时间同步
频偏
同步精度
信息开销
Wireless Sensor Network
time synchronization
frequency deviation
synchronization precision
message cost
