Clock synchronizing method and equipment

Abstract

The invention discloses a clock synchronizing method and equipment, which is used for avoiding the frequency fluctuation and phase fluctuation of downstream equipments due to the tracking of selecting the failed previous equipment, thus ensuring the stability of the clock synchronizing network. The clock synchronizing method comprises the following steps that the clock transmission messages sent by all upstream equipment are received by the downstream equipment; according to the clock synchronizing information carried in the clock transmission message, the upstream equipment except those with unusual clock synchronization is selected as the previous equipment to be tracked when the corresponding upstream equipment having unusual clock synchronization is determined by the downstream equipment, or neglect the cock synchronizing information carried in the clock transmission messages sent by the upstream equipment with unusual clock synchronization is neglected, and the upstream equipment is selected from the all upstream equipment to be taken as the previous equipments to be tracked; and before the clock synchronization unusualness of the corresponding upstream equipment is determined, all upstream equipment is selected as the previous equipment so as to be tracked.

Description

technical field [0001] The present invention relates to the technical field of clock synchronization, in particular to a clock synchronization method and equipment. Background technique [0002] In the communication network, the clock synchronization network is an indispensable part, and different services have different requirements for synchronization. With the rapid development of the 3G network, there are two types of feasible technologies to realize the transmission of frequency and phase synchronization signals in the packet network: one is the synchronization technology based on the physical layer, such as the synchronous Ethernet technology of ITU-TG.8261; The second is packet-based synchronization technology, such as IEEE 1588 V2. SyncE can only support the transmission of frequency signals, not the transmission of phase signals, so the simple syncE solution is only suitable for scenarios that do not require phase synchronization requirements; IEEE 1588V2 is a prec...

AI Technical Summary

Problems solved by technology

[0008] From the above analysis, it can be seen that if the parent device selected by the downstream device does not lock the frequency or the phase is not synchronized due to a fault, the frequency and phase of the downstream device fluctuate, which affects the stability of the clock synchronization network.

Images