一种基于数据链路层的局域网时间同步新机制  

New mechanism of realizing time-synchronization in LAN based on data link layer

作　　者：谌华金[1] 何佳洲[1] 

机构地区：[1]江苏自动化研究所,江苏连云港222006

出　　处：《计算机应用》2010年第5期1183-1187,共5页journal of Computer Applications

摘　　要：常用的网络时间协议在应用层实现时精度较低,而在物理层实现时虽精度高但有一定的硬件要求。借鉴著名的网络抓包软件——Win Pcap时间戳管理机制,在数据链路层以纯软件方式实现了一种高精度的局域网(LAN)相对时间同步算法。在Windows XP环境下的小型局域网内的测试结果表明,该算法可达100μs以内的同步精度。The precision of the common network time protocol is low when being realized in the application layer,while high in physical layer yet a definite hardware is in need.With reference to the WinPcap time stamps management method of the famous network packet pawing software,a new high precision relative time synchronization algorithm was implemented with pure software in data link layer.Besides,the software was tested under Windows XP circumstance in an abbreviated LAN.The result indicates that the proposed algorithm can attain synchronization precision within 100 μs.

关 键 词：数据链路层 同步 时间戳 局域网 相对 驱动 

分 类 号：TP393.07[自动化与计算机技术—计算机应用技术]