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High-precision real-time synchronization method based on IEEE1588

A real-time synchronization and high-precision technology, applied in the direction of synchronization devices, time-division multiplexing systems, digital transmission systems, etc., can solve problems such as being in a blank state, achieve uniformity and accuracy problems, and reduce data transmission time fluctuations Effect

Inactive Publication Date: 2008-07-30
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although the IEEE1588 protocol has only been formulated for a few years since 2002, it has shown its wide application prospects, and the current research on hardware is still in a blank state.

Method used

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  • High-precision real-time synchronization method based on IEEE1588
  • High-precision real-time synchronization method based on IEEE1588
  • High-precision real-time synchronization method based on IEEE1588

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the drawings and embodiments.

[0044] As shown in Figure 1, a sub-network based on industrial Ethernet, there are N (N≥1) devices, each device can be regarded as a node on the network, and each node contains a clock, the most accurate clock is determined. As the master clock, and other nodes are set as slave clocks, our purpose is to achieve certain functions for specific devices in this sub-network, so that the time of all devices in the network sub-domain is synchronized with the most accurate device. time. The master-slave characteristics of the device can be changed during the synchronization process. It is achieved through the optimal master clock algorithm. The change is based on their respective priorities. The higher the priority, the greater the possibility of becoming the master clock, and the priority is based on the clock. The features are configured by themselves, and the better the feat...

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Abstract

The invention relates to a real-time synchronization method based on PTP precision clock synchronization protocol of IEEE1588. The research on hardware of IEEE1588 protocol is still a blank at present. The method of the invention includes the following steps: sending messages; receiving messages; correcting the local system time; selecting the optimal master clock. And the synchronization action is different when the corresponding equipment is a master clock or a slave clock. The hardware method reduces the inherent fluctuation of data transmission time of internet technology, while not affecting the scope of precision control, thus resolving the problem of the clock uniformity and precision in a distributed network system.

Description

Technical field [0001] The invention belongs to the technical field of integrated circuits, and relates to a hardware implementation method for real-time synchronization of field devices in an industrial real-time Ethernet, and in particular to a real-time synchronization method based on the PTP precision clock synchronization protocol of IEEE1588. Background technique [0002] With the development of network technology, many application systems are currently built in a distributed network environment. At this time, without a unified and accurate clock, it is difficult for these applications to work and run normally. Especially in distributed control systems, taking into account real-time scheduling and control, the requirements for time unity are more stringent. Therefore, the establishment of a time-uniform distributed system is the basic requirement of a distributed network. The industrial Ethernet we are involved in belongs to the category of this distributed network. PTP (Pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L7/00H04L29/06H04J3/06
CPCH04J3/0667
Inventor 张艳韩雁霍明旭陈金龙廉玉平
Owner ZHEJIANG UNIV
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