嵌入式分布系统中网络设备的时间同步  

Time Synchronization of Network Devices in Embedded Distributed System

作　　者：苏伟[1] 杨斌[1] 

机构地区：[1]西南交通大学信息科学与技术学院,成都610031

出　　处：《单片机与嵌入式系统应用》2012年第2期12-14,18,共4页Microcontrollers & Embedded Systems

摘　　要：针对航电系统中报文的处理需要时间同步的要求,采用VxWorks嵌入式操作系统,设计并实现了网络授时协议(NTP)服务器,建立了可靠的处理机制。重点对NTP协议进行介绍,包括其工作原理、网络结构、工作模式以及处理流程。最后对课题的分布式系统性能进行测试并作出详细的分析,阐明建立网络时间服务体系的必要性。NTP协议用于同步分布式系统中的计算机时间,对于分布式系统的网络应用有着重要的参考价值。For the requirements o[ processing packets with time synchronization in the avionics system, the subject is proposed using VxWorks Embedded operating system to design and implement a network time protocol（NTP）server and establish a reliable process mechanism. This paper focuses on the NTP Protocol description, including its working principle, the network structure, work patterns and processes. Finally, performance of distributed systems is tested and analysis to clarify the establishment of a network time service system is detailed. NTP protocol is used for computer time synchronization in distributed systems, and network applications for distributed systems have importance value.

关 键 词：NTP协议 嵌入式分布系统 VXWORKS 网络中间件 网络授时 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]