Patent ID: 11876606
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method implemented on a reconfigurable optical add-drop multiplexer (ROADM) comprising:
selecting, by a controller, a set of wavelength channels from the plurality of wavelength channels;
determining, by the controller, if there is any contention between the set of wavelength channels;
directing, by the controller, a first subset of wavelength channels from the set of wavelength channels that do not have contentions to a primary path, the primary path being included in each one of the plurality of add/drop cards in the ROADM; and
directing, by the controller, a second subset of wavelength channels from the set of wavelength channels that have contentions to a secondary path, the secondary path being included in each one of the plurality of add/drop cards in the ROADM,

wherein:
the primary path includes a plurality of M1×1 multiplexer wavelength select switches (WSSs) and a plurality of 1×M2 demultiplexer WSSs coupled in Colorless, Directionless (CD) mode of operation, M1 and M2 being integer values; and
the secondary path includes a plurality of N1×1 multiplexer wavelength select switches (WSSs) and a plurality of 1×N2 demultiplexer WSSs coupled in Colorless, Directionless (CD) mode of operation, N1 and N2 being integer values.