Centralized method for realizing 1588 time synchronization on distributed system

Abstract

The invention provides a centralized method for realizing 1588 time synchronization on a distributed system, and relates to the field of 1588 time synchronization. The method comprises: a master clock node sending a synchronization message, carrying t1 and t1'-t1, t1' being time when a same node wire board sends the synchronization message, a slave clock node receiving the synchronization message, marking t2' and t2, calculating a synchronization message correction time delay value; the slave clock node sending a delay request message, carrying t3 and t3'-t3, t3' being the time when the same node wire board sends the delay request message, receiving the delay request message by the master clock node, marking t4' and t4, calculating a delay request message corrected delay value, inserting the delay request message corrected delay value and the t4 into a delay response message, sending to the slave clock node, the slave clock node obtaining all timestamps and two corrected delay values, through a time synchronization algorithm, completing time synchronization. The method can reduce development and debugging workload, simplifies backboard wiring, reduces synchronizing signal interference, and shows for the external by integrated time source information.

Description

technical field [0001] The invention relates to the field of 1588 time synchronization, in particular to a centralized method for realizing 1588 time synchronization on a distributed system. Background technique [0002] 1588 time synchronization technology is a high-precision time synchronization technology based on the IEEE 1588V2 protocol. This protocol can achieve sub-microsecond time synchronization. In the mobile bearer network, in addition to the requirements of the TDM (Time Division Multiplexing, Time Division Multiplexing) service , it is also necessary to ensure high-precision time synchronization between base stations. [0003] Currently, operators mainly prefer to implement 1588 time synchronization through a BC (Boundary Clock, boundary clock) mode. For a centralized small device with a single board, it is relatively simple to implement the BC mode. It only needs the board to have the hardware conditions to support the 1588 function, and the 1588 protocol can ...

AI Technical Summary

Problems solved by technology

[0004] However, for distributed large and medium-sized equipment, the ports that need to support the 1588 function are distributed on each line card. Because the hardware structure of different line cards is different, all the boards need to run a set of BMC (Best Master Clock algorithm, best master clock) algorithm and 1588 protocol, not only occupying too many resources, but also the workload of development and debugging is very large

In addition, all boards need to be synchronized with each other, and the backplane wiring is complicated; when the coordination between the line cards is not correct during the switching process, the synchronization signal is easily disturbed; the device time information is divided into several pieces, and it is difficult for the node to communicate with the outside world as a whole. Time source information embodiment

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