Optical fiber line warning door line protection method of wavelength division system

Abstract

The invention relates to an optical fiber line warning door line protection method of a wavelength division system, which concretely comprises the following steps of: subtracting the receiving optical power of a local terminal optical protection unit from the optical power of the transmitting port of a paired optical protection unit to obtain the line insertion loss value of a fiber core, and sequentially detecting the line insertion loss values of a main fiber core and a spare fiber core; wherein the line insertion losses are adopted as switching criterions which comprise two switching criterions, one switching criterion is the criterion for switching from a main line to a spare line and comprises the conditions that the line insertion loss value of any fiber core of a main fiber exceeds the set switching threshold value of the line insertion loss, and the line insertion loss values of two spare fiber cores are both above the set warning threshold of the line insertion loss; and the other switching criterion is the criterion for switching from the spare lines to the main line and comprises the conditions that the line insertion loss of any spare fiber core in the two spare fiber cores exceeds the set switching threshold, and the line insertion loss mean value of the two fiber cores is above the set warning threshold. The invention adopts the line insertion loss as the switching criterion for the line protection of the wavelength division system and effectively solves the difficult problem on multi-span section protection of the wavelength division system.

Description

technical field [0001] The invention relates to a method for protecting optical fiber lines. In particular, it relates to an optical fiber line alarm threshold circuit protection method of a wavelength division system that can effectively solve the multi-span protection of the wavelength division system. Background technique [0002] Usually, the protection of the WDM system adopts the method of forming a multiplex section into a ring, but this protection method is very expensive, so most WDM systems are usually chained, especially a trunk line. For this kind of line, it is more effective to adopt the automatic switching protection mode of optical fiber line, and the application is more and more common. The technology currently used is that when the optical power of the main optical fiber drops, the switching action is triggered, so that the optical protection system switches to the backup route. There are many difficulties in applying this method to the protection of the ...

AI Technical Summary

Problems solved by technology

When one section is blocked, the OA of the entire WDM system will be closed, so each optical protection unit will receive the information of optical power drop, which will trigger the switching action of the optical protection unit, resulting in all OTM-OTM The optical protection unit is switched, causing switching confusion and even causing the system to be unrecoverable

Images