无线传感器网络基于概率分发的时间同步协议

Probability Distribution Based Time Synchronization Protocol for Wireless Sensor Networks

针对移动传感器网络中的网络特性,提出了一种基于概率分发的时间同步协议.该协议中已同步节点根据自身的当前状态,以动态变化的概率发送同步信息对其他节点进行同步,在保证网络同步信息充足的前提下。大幅度降低了同步信息的冗余度.该协议不需要建立网络的层次拓扑结构,节点之间只需要进行1次通信即可实现同步,能够满足移动传感器网络的时间同步需求.

Taking the dynamic topology characteristic of mobile sensor networks into account, a probability distribution-based time synchronization protocol （PDTS） is proposed. In PDTS, synchronized nodes send out synchronization messages with self-adaptive probability according to their current states to synchronize other nodes. By this means, the sufficiency of synchronization messages is guaranteed and the redundancy in the networks is reduced remarkably. Additionally, there is no need to establish network hierarchy and merely one communication is required to synchronize a pair of nodes in PDTS. Due to the before-mentioned advantages, PDTS can be applied to mobile sensor networks effectively.