摘要
提出了一种适用于水下传感器网络(UWSN,Underwater Wireless Sensor Networks)的时间同步方法。在设计过程中,对同步能耗、同步精度和同步效率进行了综合考虑;在实现中,对水声网络时间同步过程的主要误差因素进行了补偿,然后采用一种循环收敛的方法使所有节点时间戳收敛到一定误差范围内,减小了节点间同步误差在水声对等网络中多跳引起的累计效应。最后的仿真与实验结果表明,该同步方法达到了较高的时间同步精度和收敛速度。
A time synchronization method was proposed for underwater wireless sensor networks. In the design of the proposed method, the tradeoff among the time synchronization precision, communication efficiency and power consumption was considered well. In the realization of the proposed method, the main factors, which had effects on the synchronization precisons in underwater acoustic networks, were compensated firstly,＂ and then a loop convergence method was designed to make all nodes＇ time lable convergent to be identical, which decreased the cumulative errors in the multi-hop scene. The simulation and experimental results show that the proposed method has good performance on synchronization precision and convergence speed.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2011年第1期108-112,117,共6页
Journal of System Simulation
基金
国家自然科学基金(60635010
60725309)
关键词
时间同步
水声通信
链路访问控制
水下无线传感器网络
time synchronization, underwater acoustic, medium control, underwater wireless sensor networks
