白兔:一个用于鲁棒亚纳秒同步的PTP应用程序

2011 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication Pub Date : 2011-11-07 DOI:10.1109/ISPCS.2011.6070148

M. Lipinski, T. Wlostowski, J. Serrano, P. Alvarez

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引用次数: 200

摘要

本文描述了白兔网络中的时间分布。我们首先简要介绍White Rabbit项目，解释其需求，以强调系统计时方面的重要性。然后，我们介绍了用于在网络的所有组件中实现高时钟精度，稳定性和弹性的技术。特别说明了IEEE 1588-2008 (PTP)和同步以太网标准的选择。为了适应硬件支持的机制来提高PTP同步精度，我们为PTP引入了白兔扩展(WRPTP)。给出了支持twrptp的硬件。WRPTP性能的测量结果表明，在5km光纤链路上，精度低于10ps, ptp消息交换速率降低，精度达到亚纳秒级。实现的测试表明与现有的PTP设备完全兼容。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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White rabbit: a PTP application for robust sub-nanosecond synchronization

This article describes time distribution in a White Rabbit Network. We start by presenting a short overview of the White Rabbit project explaining its requirements to highlight the importance of the timing aspects of the system. We then introduce the technologies used to achieve high clock accuracy, stability and resilience in all the components of the network. In particular, the choice of the IEEE 1588-2008 (PTP) and Synchronous Ethernet standards are explained. In order to accommodate hardware-supported mechanisms to increase PTP synchronization accuracy, we introduce the White Rabbit extension to PTP (WRPTP). The hardware used to supportWRPTP is presented.Measured results of WRPTP performance demonstrate sub-nanosecond accuracy over a 5km fiber optic link with a precision below 10ps and a reduced PTP-message exchange rate. Tests of the implementation show full compatibility with existing PTP gear.

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2011 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication

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