IEEE1588 based accurate clock synchronization protocol system and synchronization method thereof

A precise clock synchronization and protocol technology, applied in transmission systems, synchronization devices, digital transmission systems, etc., can solve the problems of increased network traffic, no frequency compensation, and reduced synchronization accuracy, so as to overcome crystal oscillator drift and reduce communication. The effect of bandwidth
CN101977104AActive Publication Date: 2011-02-16SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2011-02-16

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Abstract

The invention relates to an IEEE 1588 based accurate clock synchronization protocol system and a synchronization method thereof, belonging to the technical field of network information transmission. By adopting the invention, a main clock carries an accurate timestamp while sending a synchronization message, and a follow message is not required to be sent, thus greatly reducing communication bandwidth required for realizing clock synchronization. Meanwhile a frequency adjustable clock counter is constructed, and clock synchronization algorithm is combined, so as to realize frequency compensation function and achieve high accuracy clock synchronization requirement.
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Description

technical field

[0001] The present invention relates to a system in the technical field of network information transmission and a synchronization method thereof, in particular to an IEEE 1588 precise clock synchronization protocol system without follow-up messages and a synchronization method thereof. Background technique

[0002] In recent years, due to its openness, mature technology, high transmission rate, wide application and low price, Ethernet has received more and more attention, and has a tendency to be further applied to industrial sites. However, because its MAC layer protocol adopts CSMA / CD, it has the defect of uncertain queuing delay, which makes it unable to be effectively used in industrial control. The "uncertainty" of response time (that is, poor real-time performance) and the "asynchrony" of each module in the system have become the bottlenecks that hinder the "one network to the end" of Ethernet technology. Among them: Some industrial sites require extre...

Claims

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