Communication station, optical communication system, data transmission method, and storage medium

An optical communication system comprising:

• at least two communication stations, wherein the at least two communication stations comprise a first station, and the first station comprises:
• a first reconfigurable optical add-drop multiplexing (ROADM) device which includes a first port being capable of connecting a cable in a first direction of a network;
• a second ROADM device connected to the first ROADM device, which includes a second port being capable of connecting a cable in a second direction of the network, wherein the second direction is different from the first direction;
• and
• an optical protection device;
• wherein the optical protection device is respectively connected to the first ROADM device and the second ROADM device, and is configured to control the first station to perform communication of corresponding service with the second station in the first direction corresponding to the first ROADM device, or to perform communication of the corresponding service with the second station in the second direction corresponding to the second ROADM device;
• wherein when a communication abnormality is detected to occur when the communication with the second station for the corresponding service is transmitted in the first direction corresponding to the first ROADM device, the optical protection device is configured to switch the communication in the first direction corresponding to the first ROADM device to the second direction corresponding to the second ROADM device to transmit communication with the second station corresponding to the service;
• and
• wherein the communication is capable of being performed between the two communication stations in a first direction or a second direction, and the second direction is different from the first direction.

A data transmission method applied to a first station, comprising:

• detecting whether a communication abnormality occurs when communication with a second station for a corresponding service is transmitted in a first direction corresponding to a first ROADM device included in the first station;
• and
• when the communication abnormality is detected, switching the communication to a second direction corresponding to a second ROADM device included in the first station to transmit the communication with the second station for the corresponding service, comprising:
• when the communication abnormality is detected, switching, by an optical protection device in the first station corresponding to the communication service, the communication in the first direction corresponding to the first ROADM device to the second direction corresponding to the second ROADM device included in the first station to transmit communication with the second station corresponding to the service.