Method and device for automatically acquiring unsymmetrical delay of 1588 links

Abstract

The present invention provides a method and device for automatically acquiring unsymmetrical delay of 1588 links. The method includes the following steps that: a 1588 time synchronization protocol is operated on a master clock and a slave clock separately, a first group of timestamps is obtained, a 1588 transmitting link and receiving link are set between the master clock and the slave clock; a reversion protocol is operated on the master clock and the slave clock separately, the 1588 receiving link and the 1588 transmitting link at the master clock side and the slave clock side are reversed; the 1588 time synchronization protocol is operated on the master clock and the slave clock, a second group of timestamps is obtained; and the unsymmetrical delay of the 1588 transmitting link and receiving link between the master clock and the slave clock is calculated according to the obtained first group of timestamps and the second group of timestamps. According to the method and device of the invention, the reversion protocol is operated, so that effective conduction of a reversion process can be ensured, a situation that the links cannot be restored after being reversed can be prevented, and reliability can be improved, and at the same time, a large quantity of labor cost and high instrument test cost can be saved, time can be saved, and efficiency can be improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for automatically obtaining the asymmetric delay of 1588 links. Background technique [0002] With the rapid development of communication networks, the 1588 time synchronization protocol has been used more and more in communication networks. The 1588 protocol provides a method for how to realize time synchronization. A basic prerequisite is that the physical link is symmetrical. However, there is an unavoidable asymmetry problem in the actual network, that is, the transmission delay of the sending and receiving links is not equal, so the time deviation is calculated using the 1588 time synchronization protocol, and half of the asymmetric error value is not calculated into the deviation value, so that Time offsets are not corrected correctly, reducing time synchronization quality. In the case of severe asymmetric delay, it may even lead to time...

AI Technical Summary

Problems solved by technology

[0005] The synchronization error is corrected by reversing the line, but there are still several problems: how to negotiate between the two devices when the line is reversed? How to ensure that the process is carried out effectively? When an abnormal situation occurs, how to ensure that the reversed line returns to its original state? If these problems are not resolved, the reliability of this solution cannot be guaranteed and cannot be effectively implemented in the actual environment

However, the optical splitter has a large attenuation of the optical signal, and it also does not support the case where the transmission link is a circuit.

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