Abstract: In this paper，a flooding time synchronization protocol based on send-send theory is proposed，which uses the single synchronization grouping to realize the synchronization between a couple nodes.This algorithm is robust and adaptive to characters of sensor network.The contribution of this paper is that the authors design and implement the software of time synchronization on real sensor nodes，and control the error within microsecond，which has great profit for the real environment of sensor network.

Key words: wireless sensor network, time synchronization implementation, flooding

摘要： 介绍了洪泛时间同步协议基于发送者-发送者的基本理论，利用单个同步分组实现节点对之间的同步，算法的鲁棒性好，能够适应传感器网络的特点。该文的贡献在于在实际的传感器节点上设计并实现了时间同步算法的软件并分析了实验结果，以此将时间同步的误差保持在微秒级的范围内，对传感器网络应用到实际环境中有一定的意义。

关键词: 无线传感器网络, 时间同步实现, 洪泛