Patent ID: 8103161
Filing Date: 2012-01-24
Classification: H04B,H04J

Abstract:
1. A method for group optical channel shared protection, which is used for a ring network constituted by connecting at least two nodes with two fibers with a relation of mutually working and backing up; wherein, each of the at least two nodes performs following steps when a failure occurs: combining affected optical wavelengths, whose source node is current node and is used for adding service signals of the affected optical wavelengths, on a working fiber into a first group, and switching the first group to a backup fiber; combining optical wavelengths, whose destination node is the current node and is used for dropping service signals of the optical wavelengths, on the backup fiber into a second group, and switching the second group to the working fiber; and combining optical wavelengths, whose destination node is not the current node, on the backup fiber into a third group, and making the third group transparently pass through the current node; wherein the method further comprises: blocking or stripping off each backup wavelength transferred on the backup fiber according to source and destination information of each backup wavelength, so as to prevent the backup wavelength from forming a loopback.