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Method for calibrating PTP master clock in non-real-time system

A non-real-time, master clock technology, applied in the direction of time-division multiplexing system, electrical components, multiplexing communication, etc., can solve the problem of not providing strong real-time performance, and achieve the effect of simplifying the difficulty of processing and high real-time performance

Active Publication Date: 2019-02-19
青岛理工大学(临沂)管理委员会办公室
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Problems solved by technology

[0003] In some non-real-time operating systems, take the Linux operating system as an example, Linux itself has powerful network functions, and has an open source PTP protocol stack, but standard Linux does not provide strong real-time

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  • Method for calibrating PTP master clock in non-real-time system

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Embodiment Construction

[0045] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0046] figure 1 , figure 2 They are respectively a schematic flow diagram and a schematic diagram of hardware connection of a method for calibrating a PTP master clock in a non-real-time system provided by the embodiment of the present application. In this embodiment, the Linux operating system is adopted in the soft...

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Abstract

The embodiment of the invention discloses a method for calibrating a PTP master clock in a non-real-time system, and relates to the technical field of clock synchronization. The calibrating method comprises the steps of configuring a PTP chip in the non-real-time system, and calibrating the accuracy of the time of the PTP chip; setting a timer thread for detecting the change of the system clock and second pulse hopping in the non-real-time system; checking a satellite message and a second pulse signal by the non-real-time system, and adjusting PHY hardware time and system time when the satellite message and the second pulse signal are valid. The method for calibrating the PTP master clock in the non-real-time system provided by the invention is high in timeliness, the non-real-time systemcan be extremely convenient to calibrate the accuracy of the PTP master clock, the calibration accuracy reaches a submicrosecond level, and the requirements of most PTP time systems are met.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of clock synchronization, and in particular to a method for calibrating a PTP master clock in a non-real-time system. Background technique [0002] PTP (Precision Time Protocol, Precision Time Protocol) is a time synchronization protocol, which itself can be used for high-precision time synchronization between devices, and can also be used for frequency synchronization between devices. Compared with NTP (NetworkTime Protocol, Network Time Protocol), PTP can meet higher precision time synchronization requirements. Generally, NTP can only achieve sub-second time synchronization accuracy, while PTP can reach sub-microsecond level, and the real-time performance is very high. . [0003] In some non-real-time operating systems, take the Linux operating system as an example, Linux itself has powerful network functions, and has an open source PTP protocol stack, but standard Linux does not...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0644H04J3/0667
Inventor 张强丁建
Owner 青岛理工大学(临沂)管理委员会办公室
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