A method, system and terminal for avoiding clock looping in a digital synchronous network

Abstract

The present invention discloses a method and a system for avoiding digital synchronization network clock ring formation and a terminal. The method comprises the steps of: receiving a clock identifierwith a clock source ID type sent by an adjacent network element or a clock identifier with an MAC address type having a corresponding relation with the clock source ID from a corresponding circuit through each circuit clock source; for each circuit clock source, determining whether the circuit clock source is available or not according to the received clock identifier; according to the received clock identifier type, determining the clock source ID transmitted by the adjacent network element, comparing whether the clock source ID is consistent with all the clock source IDs or not to determinewhether the circuit clock sources are available or not; selecting one clock source from the available clock sources as a current used clock source; and controlling each circuit clock source to send the clock identifier, the clock quality grade and the clock of the current used clock source to the adjacent network element through the corresponding circuit. The method and the system for avoiding digital synchronization network clock ring formation and the terminal can flexibly avoid clock ring formation.

Description

technical field [0001] The invention relates to clock synchronization technology, in particular to a method, system and terminal for avoiding clock looping in a digital synchronization network. Background technique [0002] Digital synchronous network technology is widely used. If there is a frequency difference and excessive drift between network elements in a digital synchronous network, frame slip and code slip will occur. In order to ensure reliable data transmission, frequency synchronization between network elements is required on the digital synchronous network to avoid data errors. [0003] In order to ensure the accurate synchronization of the frequency of each network element in the digital synchronization network, it is necessary for all network elements to obtain synchronous reference clocks from at least two paths. When the main link is disconnected, the entire network can switch to the backup link for protection. effect. The timing reference of the digital sy...

AI Technical Summary

Problems solved by technology

[0012] 2) It can only communicate with devices using the same scheme

[0014] 1) Because the MAC address of the network element is placed in the position of the source MAC address of the ESMC message, the source MAC address in the message is modified, so it will affect the correct learning of the MAC address

[0015] 2) It can only communicate with devices using the same scheme

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