[1]苏宇[],胡珩[][],张涛[],等. 基于 PTPd 的精准时钟同步技术的研究[J].计算机技术与发展,2016,26(01):175-180.
　SU Yu[],HU Heng[][],ZHANG Tao[],et al. Research on Precision Clock Synchronization Technology Based on PTPd[J].,2016,26(01):175-180.
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 基于 PTPd 的精准时钟同步技术的研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
26
期数:
2016年01期
页码:
175-180
栏目:
应用开发研究
出版日期:
2016-01-10

文章信息/Info

Title:
 Research on Precision Clock Synchronization Technology Based on PTPd
文章编号:
1673-629X（2016)01-0001-05
作者:
 苏宇[1] ; 胡珩[1][2] ; 张涛[1];  王金波[1]
 1.中国科学院 空间应用工程与技术中心；2.中国科学院大学
Author(s):
 SU Yu[1];  HU Heng[1][2] ; ZHANG Tao[1];  WANG Jin-bo[1]
关键词:
 ; 时钟同步; 网络时间协议; IEEE1588; PTPd
Keywords:
 ; clock synchronization; NTP; IEEE1588; PTPd
分类号:
TP202.2
文献标志码:
A
摘要:
 IEEE1588定义了一种精准时钟同步协议(PTP),因其具有高同步精度,故逐渐取代传统的 NTP(Network Time Pro-tocol)被广泛应用于更高时钟同步精度的分布式测控系统中。 PTP 协议可以通过纯硬件或纯软件方式实现,纯硬件方式通过硬件编程实现,同步精度可达纳秒量级,但是开发难度大；而纯软件实现的 PTP 利用协议实现完整的开源代码 PTPd 实现,开发难度较低,同步精度略低于纯硬件实现的 PTP 协议。文中在深入比较、分析了 IEEE1588协议与 NTP 的同步机理后,并对纯软件实现的 PTP(PTPd)进行同步精度测试。结果表明,PTPd 的同步精度可达±10μs,远优于传统的 NTP 同步协议±200 ms 的同步精度,而被成功应用于载人航天嵌入式软件第三方评测分布式测试系统中。
Abstract:
 IEEE1588 defines a Precision Time clock synchronization Protocol (PTP) which is widely used in distributed measurement and control systems where higher synchronization precision are necessary,and PTP gradually takes the replace of the traditional NTP because of its high synchronization accuracy. The PTP can be achieved by pure hardware or pure software. The pure hardware method can achieve the synchronization precision up to nanoseconds through the hardware programming,but the development is difficult,while the pure soft-ware method can be achieved by the open source PTPd code,it is simple and able to obtain a lower synchronization accuracy than the pure hardware. In this paper,synchronization mechanism of NTP and IEEE1588 precision clock synchronization protocol was compared and analyzed,the PTP(PTPd) is implemented in pure software method were tested. Result of tests proves that the synchronization preci-sion of PTPd is within 10 μs,which is much better than the NTP’s ±200 ms,so PTPd has been successfully applied in the third-party embedded software testing of distributed testing system for manned spaceflight.

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更新日期/Last Update: 2016-04-13