Method for reliably improving time synchronization precision based on IEEE1588 protocol

An IEEE1588, time synchronization accuracy technology, applied in the field of network communication, can solve the problems of long synchronization interval, complexity, limited network bandwidth, etc., achieve high synchronization accuracy, small calculation amount, and improve the effect of synchronization accuracy
CN103647614AInactive Publication Date: 2014-03-19SHANGHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI UNIV
Publication Date
2014-03-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for reliably improving time synchronization precision based on an IEEE1588 protocol. The method comprises a master clock sends an IEEE1588 synchronization message every two seconds, and a slave clock, based on the content of the protocol, carries out synchronization; within the two second interval, the master clock sends a precision synchronization message every 100 milliseconds, wherein the message only comprises starting synchronization identification so as to reduce network overhead; the slave clock regards the time difference of the arrival of the two precision synchronization messages being 100 milliseconds; a slave clock device is provided with a storage device and a counter, wherein the storage device saves a value N, and the value is the accumulation times of the counter in the 100 milliseconds under the theoretical work frequency; when the next precision synchronization message arrives, the slave clock compares the N and the true value of the counter, and the time of the slave clock is adjusted based on the difference value of between; and thus the problem of generation of master clock and slave clock drift due to no synchronization measure within 2 seconds is solved, and the time synchronization precision is further improved.
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Description

technical field

[0001] The invention belongs to the technical field of network communication, and specifically relates to a method for reliably improving time synchronization accuracy based on the IEEE1588 protocol. The method is based on the IEEE1588 standard, utilizes synchronization gaps, and adopts a simplified protocol synchronization method. Background technique

[0002] Time has always been an important concept in measurement and industrial control systems. Time is relative in the execution of a closed electronic circuit or computer program. As sensors, repeaters, or distributed computers are added to industrial systems, accurate time recording is important for system robustness.

[0003] The full name of IEEE1588 is "Precise Clock Synchronization Protocol Standard for Network Measurement and Control Systems". Its appearance provides an effective and feasible method for solving time synchronization problems in the system. The IEEE1588 clock protocol can achieve sub-m...

Claims

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