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Distributed network clock synchronization system

A distributed network, clock synchronization technology, applied in the field of electronics and communication, can solve the problem of unable to achieve clock synchronization accuracy, and achieve the effect of reliable time synchronization scheme and strong robustness

Inactive Publication Date: 2018-09-28
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the IEEE1588 protocol is used to complete the clock synchronization of the system, and the time signal is transmitted to the terminal node through the system channel, which requires a delay, and the delay required by different terminal nodes is also different. Therefore, this timing method can only meet the requirements of medium precision. The requirements of time users, that is, can only meet the requirements of time synchronization accuracy at the ms level. Some distributed network systems that have very strict requirements for time synchronization accuracy cannot achieve the required clock synchronization accuracy.

Method used

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Embodiment 1

[0043] See figure 1 with figure 2 , figure 1 A schematic structural diagram of a distributed network clock synchronization system provided by an embodiment of the present invention; figure 2 It is a schematic structural diagram of a slave device of a distributed network clock synchronization system provided by an embodiment of the present invention. A distributed network clock synchronization system, comprising:

[0044] Clock source, used to send clock synchronization information;

[0045] At least one level of slave equipment is connected to the clock source step by step, and is used to receive the clock synchronization information step by step and complete clock synchronization; wherein,

[0046] Both the clock source and the at least one slave device are nodes in a distributed network clock synchronization system.

[0047] Preferably, the slave device includes: an interface module, a link delay module, a time difference module, and a synchronization module; wherein ...

Embodiment 2

[0071] Please continue to see figure 1 with figure 2 , figure 1 A schematic structural diagram of a distributed network clock synchronization system provided by an embodiment of the present invention; figure 2 It is a schematic structural diagram of a slave device of a distributed network clock synchronization system provided by an embodiment of the present invention. This embodiment further describes the clock synchronization system in detail on the basis of the foregoing embodiments. The distributed network is formed by the interconnection of nodes distributed in different locations with multiple terminals, which has high reliability and is easy to expand. A distributed network clock synchronization system, such as figure 1 As shown, N is a natural number greater than or equal to 1, and the distributed network clock synchronization system includes a clock source and at least one level of slave equipment, wherein the clock source is used to send clock synchronization in...

Embodiment 3

[0082] Please continue to see image 3 with Figure 4 , image 3 A schematic diagram of the delay measurement principle of a distributed network clock synchronization system provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of a time difference principle of a distributed network clock synchronization system provided by an embodiment of the present invention. This embodiment describes the time awareness module and its time synchronization system in detail on the basis of the above embodiments.

[0083] A distributed network is formed by the interconnection of node machines distributed in different locations and having multiple terminals. Any point in the network is connected to at least two lines. When any line fails, the communication can be completed through other links, which has high reliability. At the same time, the network is easy to expand.

[0084] Preferably, all nodes in the distributed network constitute a clock synchronizat...

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Abstract

The invention relates to a distributed network clock synchronization system. The system comprises a clock source for sending clock synchronization information; and at least one level of slave equipment progressively connected to the clock source and used for progressively receiving the clock synchronization information and accomplishing the clock synchronization, wherein the clock source and the at least one level of slave equipment are nodes in the distributed network clock synchronization system. Through the system disclosed by the embodiment of the invention, the link delay is measured, thetime difference is computed through the link delay, and then the clock synchronization is realized, so that the clock synchronization precision of the distributed network clock synchronization systemcan achieve nanosecond level; and the system has strong stability; when the equipment in the distributed network is abnormal, the distributed network can self-adaptively adjust the network structurein the short time, and the appropriate main clock is reselected to accomplish the clock synchronization.

Description

technical field [0001] The invention belongs to the field of electronics and communication, and in particular relates to a distributed network clock synchronization system. Background technique [0002] With the development of information technology, the application of the distributed network system is becoming more and more diversified, and the application equipment relying on the distributed network system is also rich and diverse. The clock synchronization of the distributed network system can make each network node in the system complete Accurate time synchronization is provided to the control equipment applications where each node in the system is located. With the improvement of equipment, the accuracy requirements of clock synchronization are getting higher and higher. [0003] At present, most distributed network systems use the IEEE1588 (precise clock synchronization protocol standard for network measurement and control systems) protocol to complete the clock synchr...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04L29/08
Inventor 吕宁陈晨王昌明吕高登李彦鑫郑昊
Owner XIDIAN UNIV
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