METHOD FOR REDUNDANCY IN AN OPTICAL COMMUNICATION NETWORK WITH WAVELENGTH DIVISION MULTIPLEXING SYSTEMS Russian patent published in 2022 - IPC H04B10/00 

FIELD: communication.

SUBSTANCE: invention relates to communication equipment and can be used in optical communication networks (OCN). To realise the technical result, the structure of an optical communication network is pre-formed as to provide at least three independent routes between each pair of corresponding nodes, with a minimum total consumption of the length of the optical cable; the maximum permissible value of the level of received optical signal, whereat a permissible error coefficient is provided, is set; the level of optical signal is monitored in the optical fibres of the lines of the optical communication network; if the optical power in the optical fibres of the optical cable included in the main route is reduced or lost, an automatic switch to one of the two remaining routes is performed in the fibres of optical cables with a sufficient level of the power of optical signal.

EFFECT: increase in the reliability of OSS due to the use of two other routes with a simultaneous reduction in the level of optical signal.

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