| 统计同步算法原理及在局域网中的应用 |
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| 引用本文： | 汤廷松,李广云,吴凤娟,吴平安.统计同步算法原理及在局域网中的应用[J].测绘科学技术学报,2007,24(5):377-380. |
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| 作者姓名： | 汤廷松 李广云 吴凤娟 吴平安 |
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| 作者单位： | 信息工程大学,测绘学院,河南,郑州,450052;61081部队,北京,100094;66240部队,北京,100042 |
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| 摘 要： | 针对局域网中计算机间的时间同步问题,分析了统计同步算法PCS的基本原理,介绍了局域网中网络延迟精确测定的方法,提出了利用一台时统设备实现局域网中PCS算法精度测试的方法,给出了频率漂移的修正公式,并在局域网中对算法性能进行了测试.测试结果表明,计算机时钟的漂移是影响算法精度的主要因素.经过频漂修正,PCS算法性能得到了很大的改善,同步周期较设计周期大大增加,算法同步精度在20min内优于1 ms.
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| 关 键 词： | 时间同步 统计同步算法 时钟漂移 网络延迟 GPS OEM板 |
| 文章编号： | 1673-6338（2007）05-0377-04 |
| 收稿时间： | 2007-03-01 |
| 修稿时间： | 2007-06-20 |
Principle of Statistic Synchronization Algorithms and Application in LAN |
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| TANG Ting-song,LI Guang-yun,WU Feng-juan,WU Ping-an.Principle of Statistic Synchronization Algorithms and Application in LAN[J].Journal of Zhengzhou Institute of Surveying and Mapping,2007,24(5):377-380. |
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| Authors: | TANG Ting-song LI Guang-yun WU Feng-juan WU Ping-an |
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| Institution: | 1. Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052, China; 2. 61081 Troops, Beifing 100094, China; 3. 66240 Troops, Beijing 100042, China |
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| Abstract: | This paper introduced a study on measuring the network delay in LAN. It analyzed the principle of the Statistic Synchronization Algorithms, PCS. At the same time, it brought forward a way of testing the precision of PCS in LAN through a single equipment, presented a correction formula on frequency drift, and had an analysis of the result. As a result, after the correction, the synchronization precision of PCS was better than 1 ms within 20 minutes. |
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| Keywords: | time synchronization statistic synchronization clock drift network delay GPS OEM board |
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