摘要
时间同步作为无线传感器网络的关键技术之一,对整个无线传感器网络的发展起着不可替代的作用。提出了类似于分簇结构的基站—簇首—组首—组内的层次结构。在基站簇首之间采用了单向广播同步机制和双向成对同步机制,有效利用网络中节点的广播信息;在簇首组首之间采用了主动和被动结合的双向同步算法;在组内采用了TPSN算法;用实验仿真的方式,清晰的显示出这种层次结构的特点;将这些算法结合在一起,在保证精度的前提下,大幅度的降低了能量消耗。
Time synchronization is one of the key technologies for wireless sensor networks, and that plays an irreplaceable role for the development of the entire wireless sensor network. A the base station-the first cluster-the first group-the group＇s hierarchy is proposed similaring structure of clustering. It combines unidirectional reference broadcast and pair-wise mechanism between the base station and the first cluster, the messages for time synchronization are reduced greatly. A combined active and inactive two-way synchronization algorithm is used between the first cluster and the first group. In experimental simulation, it clearly shows the characteristics of this hierarchy. Combi- nation of these algorithms are not only ensure the accuracy of network, but also greatly reduce energy consumption.
出处
《计算机测量与控制》
CSCD
北大核心
2012年第9期2597-2599,共3页
Computer Measurement &Control
关键词
无线传感器网络
时间同步
簇首
组首
双向同步
单向同步
TPSN
wireless sensor network
time synchronization
the first cluster
the first group
Two-way synchronization
One-waysynchronization
TPSN
