A network-based time synchronization method, system and device

Abstract

An embodiment of the invention provides a time synchronization method, system and device based on a network. The time synchronization method, system and device comprises a main clock unit and at least one subordination clock unit, and the subordination clock unit comprises a backup clock module and is used for conducting clock synchronization through time synchronization signals provided by the main clock unit when the subordination clock unit is determined to be a backup main clock unit. A method comprises that the subordination clock unit receives backup main clock selection message to obtain priority information carried by the backup main clock selection message; the time synchronization is carried out through the time synchronization signals provided by the main clock unit when the subordination clock unit is determined to be the backup main clock unit according to the priority information and self priority information; and a self clock source is switched into the subordination clock module and the time synchronization signals are provided to conduct time synchronization when the time synchronization signals provided by the main clock unit are determined to be lost. The time synchronization method, system and device can improve reliability of a system.

Description

technical field [0001] The present invention relates to the technical field of communication networks, in particular to a network-based time synchronization method, system and device. Background technique [0002] In order to solve the real-time requirements of network protocols for industrial networks, the precise clock protocol (IEEE1588 protocol) realizes precise clock synchronization in measurement and control systems implemented by technologies such as network communication, local computing, and distributed objects. Among them, in the IEEE1588 protocol, three clock types are defined, namely, an ordinary clock (OC, Ordinary clock), a boundary clock (BC, Boundary clock) and a transparent transmission clock (TC, Transparent clock). Among them, the transparent clock is further divided into two types: a point-to-point transparent clock (EC, End-to-end transparent clock) and an end-to-end transparent clock (PC, Peer-to-peer transparent clock). [0003] In industrial Ethernet...

AI Technical Summary

Problems solved by technology

However, in the clock synchronization system in industrial Ethernet, since only one master clock unit is set, when the master clock unit fails and cannot work normally, other slave clock units will lose time information, thus making the industrial network unit Lower-level components are unavailable, making the system less reliable

[0004] To sum up, since there is no solution proposed in the prior art to ensure the clock synchronization of the entire network in the case of failure of the main clock unit in the industrial Ethernet, the reliability of the system is relatively high. Low

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