Method for implementing main clock phase alignment and device thereof

Abstract

This invention discloses a method and a device for aligning phases of master and standby clocks, in which, the method includes: 1, setting a first master phase-locked loop and a first sub-phase-locked loop for the master clock and setting a second master phase-locked loop and a sub-phase-locked loop for the standby clock unit, 2, the master one controls a first clock signal to follow and lock the primary clock signal by opening the first sub-phase-locked loop and closing the first master loop, 3, the standby clock unit aligns the phases of the first and second clock signals by opening the second master loop and closing the second sub-loop and 4, the standby one reads the control value of the second-sub-loop following the first clock signal and controls that the phase of signals is the same when switching the master and sub-phase-locked loops according to the control value.

Description

technical field [0001] The present invention relates to clock synchronization technology in the field of communication technology, in particular to a method and device for phase alignment of active and standby clocks during active and standby clock switching. Background technique [0002] In the synchronous digital communication network, the clock is a very important component, so the backup working mode is adopted in the design of communication equipment, that is, there are two clock units in one network element node, and the two clocks are mutually active and standby. Under normal circumstances, the master clock unit provides timing synchronization signals for communication equipment. Once the master clock unit fails or is artificially switched, the standby clock unit immediately replaces the master clock to provide timing synchronization signals for communication devices. It is necessary to ensure that the business will not be affected when the main and standby clocks are...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for realizing the phase alignment of the main and standby clocks, which is used to solve the problem that the output clock signals of the main clock unit and the backup clock unit are of the same frequency and phase, and the clock unit is locked due to the main and secondary clocks Phase transients, system instability, and poor reliability caused by ring work switching

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