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Precision Time Protocol

About: Precision Time Protocol is a research topic. Over the lifetime, 604 publications have been published within this topic receiving 6006 citations. The topic is also known as: PTP & IEEE 1588.


Papers
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Proceedings ArticleDOI
01 May 2018
TL;DR: A fundamentally redesigned Global Navigational Satellite System (GNSS) receiver to master clock interface is presented based on the previous design for IEEE 1588 Precision Time Protocol (PTP) master clocks, optimized for modern timing GNSS receivers.
Abstract: In this paper we present a fundamentally redesigned Global Navigational Satellite System (GNSS) receiver to master clock interface based on our previous design for IEEE 1588 Precision Time Protocol (PTP) master clocks. The new design is optimized for modern timing GNSS receivers; including GPS, Galileo, and GLONASS GNSS; which provide better timing accuracy and precision than previous generic navigational or even older timing GPS receivers. The new design is required because new timing GNSS receivers have lower than 10 ns error while the errors introduced by the previous interface solution is one or two magnitudes bigger than that, causing degraded system wide timing performance for new systems. Better performance is achieved by an error source analysis and a delicate component selection based on the results of the analysis, and in addition, timing oriented PCB routing. Furthermore, the new design is more compact, integrated with a CPU board, and therefore, ready to be deployed in prototype applications. The paper also provides an initial performance evaluation of the improved reference clock interface.

3 citations

01 May 2017
TL;DR: This document specifies a new Generic Associated Channel (G-ACh) for Residence Time Measurement (RTM) and describes how it can be used by time synchronization protocols within an MPLS domain.
Abstract: This document specifies a new Generic Associated Channel (G-ACh) for Residence Time Measurement (RTM) and describes how it can be used by time synchronization protocols within an MPLS domain. Residence time is the variable part of the propagation delay of timing and synchronization messages; knowing this delay for each message allows for a more accurate determination of the delay to be taken into account when applying the value included in a Precision Time Protocol event message.

3 citations

Proceedings ArticleDOI
24 Oct 2013
TL;DR: The paper elaborates in more detail on the packet delay variation monitoring and node performance monitoring functions and a possible extension to the PTP standard increasing and simplifying support for slave performance monitoring and testing.
Abstract: The IEEE1588-2008 (precision time protocol, PTP) is being deployed in various application domains including domains requiring specified synchronization performance. Deploying appropriately defined monitoring functions will support the continuous operation of synchronization networks at the required synchronization quality. The paper addresses the field of synchronization monitoring, first introducing the relevant background. It shortly reviews synchronization quality performance criteria and possible measurement metrics. This is followed by a review and analysis of synchronization performance factors and possible failure points. Synchronization monitoring functions addressing the various factors are defined and shortly described. The paper elaborates in more detail on the packet delay variation monitoring and node performance monitoring functions. Finally, a possible extension to the PTP standard increasing and simplifying support for slave performance monitoring and testing is described.

3 citations

Proceedings ArticleDOI
04 Nov 2010
TL;DR: This paper provides a scheme of time synchronization based on NTP that uses a new approach to get local clock, which improves the accuracy of local clock and improves the synchronization precision.
Abstract: Time synchronization is an important middleware service of distributed systems, amongst which Distributed Intrusion Detection System (DIDS) makes extensive use of time synchronization in particular1. Time synchronization has become a critical area of research today. Network Time Protocol (NTP) and Precision Time Protocol (PTP) are the current widely accepted standards for synchronizing clock over. This paper makes a comparison on the merits and the shortcomings of the two protocols and then provides a scheme of time synchronization based on NTP. This scheme uses a new approach to get local clock, which improves the accuracy of local clock. The results of experiments approve the scheme is feasible and improves the synchronization precision.

3 citations

Proceedings ArticleDOI
06 May 2019
TL;DR: The proposed wireless white rabbit protocol has been tested by simulations over a single carrier point to point communication system, and different channel models, and shows significant improvements of the time transfer accuracy in Line Of Sight channels compared to other common wireless time transfer approaches.
Abstract: The implementation of 5G networks has several technological challenges, which are mainly related to the UltraReliable and Low Latency Communications (URLLC). One of these challenges is precise time transfer. Precision Time Protocol (PTP) is the most widely used protocol for precise time transfer. However, PTP performance may not be sufficient in large 5G networks.In this paper, we propose the use of white rabbit as the main technology for frequency and time transfer in 5G transport networks. However, white rabbit can only be implemented in wired links, thus the time transfer performance in wireless links may not be enough for the most challenging URLLC use cases. Therefore, we propose in this paper a modification of the white rabbit protocol that can be used in wireless communications. The proposed wireless white rabbit protocol has been tested by simulations over a single carrier point to point communication system, and different channel models. The results show significant improvements of the time transfer accuracy in Line Of Sight channels compared to other common wireless time transfer approaches and a similar performance to white rabbit over wired links.

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202126
202045
201936
201839
201732
201654