To realize the low cost and high-resolution precision in the process of time synchronization, three methods are put forward by the deference of getting timestamp, and the precision is analyzed according to these motheds. Based on Windows, a mothed are proposed, it is inserted a procedure between the net work card and the transmission driver, the clock counter is captured, and it is turned system time at the same time, then the algorithm is lead into in order to adjust the clock's frequency. Results of the simulation indicate precision is less than 100 microsecond, and simulation analysis demonstrates the feasibility of the model and the effectiveness of the algorithm.%为了实现低成本、高精度的时间同步,根据时间戳获取的不同方式,设计了3种方法,并分析了采用这3种方法所能取得的时间戳精度.在此基础上,提出了一种基于Windows平台的时间同步方法,通过在网卡驱动程序和传输驱动程序之间插入一层处理程序,截获时钟计数器并在应用层与系统时间建立关联,同时引入时钟频率调整算法,实现了高精度时间同步.实验结果表明,该方法的同步精度达到亚毫秒级,从而证明了模型的可行性和算法的有效性.
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