Monitoring system, monitoring device, and monitoring method

A monitoring device comprising:

• an acquiring unit configured to acquire information indicating an environmental state in a periphery of an optical fiber based on an optical signal;
• a detecting unit configured to detect at least one of an accident or an incident and a location of the accident or the incident based on the information indicating the environmental state;
• and
• a broadcasting unit configured to, in response to the detecting unit detecting the accident or the incident:
• broadcast that the accident or the incident has occurred to an external terminal;
• and
• notify the external terminal of the location of the accident or the incident.

A monitoring method comprising:

• acquiring, using an acquiring unit, information indicating an environmental state in a periphery of an optical fiber based on an optical signal;
• detecting, using a detecting unit, at least one of an accident or an incident and a location of the accident or the incident based on the information indicating the environmental state;
• and
• in response to detecting the accident or the incident:
• broadcasting, using a broadcasting unit, that the accident or the incident has occurred to an external terminal;
• and
• notifying, using the broadcasting unit, the external terminal of the location of the accident or the incident.