Optical fiber sensing system, action specifying apparatus, action specifying method, and computer readable medium

An optical fiber sensing system comprising:

• a cable including optical fibers;
• a reception unit configured to receive, from at least one optical fiber included in the cable, an optical signal on which a vibration detected on the cable is superimposed;
• and
• an action specifying unit configured to specify, based on the optical signal, a location on the cable in which the vibration has been detected and specify an action of a target to be monitored which has caused the vibration,
• wherein the action specifying unit is configured to specify a detection pattern that is used to specify the action of the target to be monitored depending on the environment of the location on the cable in which the vibration has been detected,
• wherein the cable includes a plurality of cables laid down in a plurality of environments different from one another,
• wherein the reception unit includes a plurality of reception units that are provided in such a way that the plurality of reception units correspond to the plurality of respective cables and each reception unit is configured to receive the optical signal from a corresponding one of the respective cables, and
• wherein the action specifying unit is configured to specify the environment of the location in which the vibration has been detected depending on by which one of the reception units the optical signal on which the vibration is superimposed has been received.