Communication device and optical communication network

An optical communication network, comprising:

• a communication device, and
• a plurality of central office (CO) site rings, wherein the plurality of CO rings are connected to different branch ports of the first WSS in the communication device, and the plurality of CO rings comprise at least one target site;
• the communication device comprising a first wavelength adding/dropping unit and a first wavelength selective switch (WSS), wherein
• the first wavelength adding/dropping unit is connected to a first common port of the first WSS, and a wavelength adding resource pool signal from the first wavelength adding/dropping unit is input to the first WSS through the first common port;
• the first WSS comprises a plurality of branch ports, and the first WSS is configured to schedule different add wavelength signals in the wavelength adding resource pool signal to corresponding branch ports based on a configuration, wherein in the configuration, different add wavelength signals correspond to different branch ports;
• and
• the plurality of branch ports are in one-to-one correspondence with the plurality of CO site rings, and are configured to transmit corresponding add wavelength signals to the corresponding CO rings.