Protective method for wave length conversion unit sharing, realizing device and applicating system

Abstract

This invention provides an OUT share protection method including: A, converting the service signals carried by fault OUT to a backup OUT, B, switching the converted backup wavelength signal to the aim node of said service signal, C, finishing the end to the backup wavelength signal at the aim node and converting the service signal to a corresponding service side process unit. This invention also provides an OTC share protection device and a system capable of realizing OTC share, at the same time, multiple nodes with a same aim or different aims are allowed to share one backup OTC so as to reduce the configuration numbers of the OTC.

Description

technical field [0001] The present invention relates to equipment protection of a dense wavelength division multiplexing system, in particular to a wavelength conversion unit sharing protection method, implementation device and application system. Background technique [0002] There are two common optical wavelength channel protection modes in Dense Wavelength Division Multiplexing (DWDM, Dense Wavelength Division Multiplexing) systems: N:M and N+M optical wavelength protection modes. [0003] The working method of N:M is as attached figure 1 As shown, the N backup optical wavelength channels transmit low-priority services when the system is not faulty, but when one or more of the M optical wavelength channels fails, the low-priority services of the backup channels are discarded , the services of the faulty channel are switched to the backup channel for transmission. In most cases, N is often smaller than M. At this time, if the working wavelength channel fails, the backup...

AI Technical Summary

Problems solved by technology

[0007] However, the above two existing technologies all require that the backup OTU and the working OTU have the same source node and destination node

When there are service connections between multiple nodes, multiple backup OTUs need to be configured for service connections of different source nodes or different destination nodes, resulting in redundant configuration of backup resource nodes

If the services transmitted by multiple OTU units of a site correspond to different nodes, the existing N:M OTU unit sharing protection method cannot realize that these OTU units share the same backup OTU unit

[0008] Moreover, in an actual network, it is very rare for a site to have multiple OTU failures at the same time. Therefore, using the existing N:M OTU device sharing protection method, the OTU groups of multiple destination nodes will be protected differently. The number of backup OTUs is greatly increased, which increases system protection costs and maintenance costs

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