Method and device and system of protection of an optical network of optical rings

摘要

The invention relates to a method of protection of an optical grating that can be configured in a first and a second configuration, the optical network consisting of at least one pair of rings connecting the optical open communication nodes a of the communication nodes called communication node master comprising means for opening and / or closing of the rings, the rings are open at the level of the communication node master in the first configuration, each end of each optical ring being connected to the communication node master, characterized in that the communication node master out the steps for the generation of a predetermined signal at one end of each optical ring of a pair of rings, determination of the absence of a predetermined signal in at least one other end of an optical ring, the control of closing the opening means and / or closing of the optical rings, if the predetermined signal is absent in at least one other end of an optical ring to configure the optical network in the second configuration. The present invention also relates to the communication system and the communication node is associated.