Method for improving time synchronization precision under complex network environment

Abstract

The invention discloses a method for improving time synchronization precision under a complex network environment. The method mainly solves the problems that synchronization precision of an existing network time synchronization method can not meet requirements of engineering projects and in a serious case, master equipment and slave equipment can not be synchronized normally. The method includes the first step that that a master clock and a slave clock extract timestamps of multiple moments respectively; the second step that unlink delay and downlink delay are measured, and an uplink time delay threshold value and a downlink time delay threshold value are obtained through a time delay detection algorithm; the third step that the timestamps corresponding to the moments beyond the time delay threshold values are removed; the fourth step that precise network time delay is figured out through a time synchronization algorithm and an asymmetrical time delay compensation algorithm; the fifth step that the time of the master clock and the time of the slave clock are synchronized by the utilization of the time synchronization algorithm. The method is suitable for any network time synchronization algorithm, and by the adoption of the method, the time synchronization precision and stability can be greatly improved.

Description

technical field [0001] The invention relates to a method for improving time synchronization accuracy in a complex network environment, and belongs to the technical field of time synchronization networks. Background technique [0002] With the wide application of information technology and network technology, the signal requirements of all equipment in the system are consistent. Such as satellite launch and measurement and control system, aviation management system, social linkage system and banking system, etc. These applications have high requirements on the consistency and accuracy of the clock in the distributed system, and any error may lead to very serious consequences. [0003] Network time synchronization is based on TCP / IP technology. Commonly used network time synchronization adopts master-slave clock mode, such as NTP and PTP, etc., such as figure 1 As shown, usually the master clock records the sending synchronization time T1, and the slave clock records the tim...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for improving time synchronization accuracy in a complex network environment, aiming at complex and variable network jitter, inconsistent uplink and downlink time delays, etc., and mainly solves the problem that the synchronization accuracy of existing network time synchronization algorithms cannot meet the requirements of engineering projects, and in severe cases even The problem that the master and slave devices cannot be synchronized normally

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