High-precision NTP (Network Time Protocol) timing system and timing method thereof

A time service system, high-precision technology, applied in time-division multiplexing systems, electrical components, multiplexing communications, etc., can solve the problem of small load capacity, high dependence on processing speed, and inaccurate acquisition of NTP packet arrival time, etc. problem, to achieve the effect of improving timing accuracy and carrying capacity

Inactive Publication Date: 2012-07-11
孙得膑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]1. The arrival time of the NTP packet is inaccurate;
[0006] 2. The sending time of the NTP packet is inaccurate;
[0007] 3. The accuracy of NTP depends too much on the processing speed of the hardware CPU;

Method used

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  • High-precision NTP (Network Time Protocol) timing system and timing method thereof
  • High-precision NTP (Network Time Protocol) timing system and timing method thereof

Examples

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Embodiment Construction

[0053] The specific embodiments of the present invention are given below with reference to the accompanying drawings, which are used to further describe the present invention.

[0054] The high-precision NTP time service system of the present embodiment includes CPU2 for sending out NTP packets, and CPU2 is connected with a programmable logic device 1 for receiving NTP packets and compensating and correcting each time stamp in the NTP packets, and the programmable logic device The output end of 1 is connected to the Ethernet PHY circuit and the physical interface 3 and the timing output interface unit 4, the input end of the programmable logic device 1 is connected to the standard time source input interface 5, and the CPU2 is connected to the user management interface 6;

[0055] The timing method of the above-mentioned high-precision NTP timing system comprises the following steps:

[0056] Server side: CPU2 receives the NTP packet, and accurately records the arrival time T ...

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Abstract

The invention relates to a high-precision NTP (Network Time Protocol) timing system and a timing method thereof and belongs to the technical field of a time synchronous system and a primary-secondary clock system. The timing system comprises a CPU (Central Processing Unit) for sending an NTP packet, wherein the CPU is communicated with a PLD (Programmable Logic Device); the PLD is used for receiving and sending the NTP packet and compensating and correcting each timestamp in the NTP packet; the PLD is communicated with an Ethernet PHY (Physical Layer) circuit and a timing output interface unit; an input end of the PLD is connected with an input port of a standard time source for conveying standard time; and the CPU is communicated with a user management interface. The high-precision NTP timing system has the advantages of high precision, accurate obtained data and convenience in networking, and the high-precision NTP timing system is free from occupying a special network.

Description

technical field [0001] The invention relates to a high-precision NTP time service system and a time service method thereof, and belongs to the technical field of time synchronization systems and master clock systems. Background technique [0002] At present, NTP (Network Time Protocol), as a network timing protocol, has been widely used in various industries, but the traditional NTP itself has the disadvantages of low precision and great dependence on hardware performance. Generally, the precision of NTP is at the millisecond level , and as an NTP server, it is highly dependent on the CPU processing speed of the server. As the number of clients increases, the timing accuracy of the NTP server will decrease significantly; [0003] For industries that require high time precision, such as our time synchronization system and master clock system, the time precision requirements have reached the microsecond level or even nanosecond level. The application of NTP in these field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 孙得膑
Owner 孙得膑
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