Method, system and device for switching and selecting clock source equipment

Abstract

The disclosure discloses a method, device, and system for clock source device selecting and switching. Wherein, the method includes: when a clock slave device receives an announce message from a clock source device, the clock slave device sends a link detection message to the clock source device; when the clock slave device receives a detection feedback message fed back by the clock source device according to the link detection message, the clock slave device determines that the clock source device is a valid clock source device; when the clock slave device determines that the valid clock source device is stable, the clock slave device adds the valid clock source device into a list of backup clock source devices; and when the clock slave device needs to switch to a new clock source device, the clock slave device selects the new clock source device from the list of backup clock source devices. The communication condition of an uplink is detected via the link detection message and the detection feedback message, so that a reliable clock source device can be found, and proper synchronization of the clock slave device can be ensured.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, system and device for switching and selecting clock source equipment. Background technique [0002] Precision Time Protocol (Precision Time Protocol, PTP)—IEEEESTD1588 protocol is one of the important technologies in the field of time and frequency synchronization control. The 1588 protocol stipulates that if each device receives 2 announce messages from a certain clock source device within the time of 4 announce messages, the source is considered stable. Generally, the clock slave device records five such clock source devices as alternative sources, and then selects the one with the highest priority as the current system clock clock source device through the best clock algorithm (Best Master Clock Algorithm, BMC) algorithm. When the announce message is received overtime, it is considered that the link between the clock slave device and the clock source device h...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method, system, and device for switching and selecting clock source devices, which are used to solve the problem that an effective clock source device may not be selected due to the blocking of the upstream path of the clock source device when switching and selecting existing clock source devices

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