Control apparatus, communication system, control method and program

A communication system comprising a distributed station and a control device, wherein

• the distributed station comprises a notification processor that notifies information related to one or more events occurred within a predetermined time period at a predetermined notification frequency, and
• the control device comprises
• an acquisitor that acquires the information used for judging a wavelength switching to an optical path,
• an information analyser that executes analysis processing on the information,
• a frequency derivator that derives an occurrence frequency of the information,
• a load derivator that derives a load of analysis processing of the information, and
• a frequency controller that controls the predetermined notification frequency with a frequency lower than the occurrence frequency as an upper limit on the basis of an occurrence frequency of the information, and
• a storage processor that records the information notified from the distributed station in a storage in association with the notification time, and discards the information from the storage when it is judged that the occurrence frequency of the information is less than a predetermined threshold value.

A control method executed by a control device, the control method comprising:

• acquiring information used for judging a wavelength switching to an optical path, from a distributed station that notifies the information related to one or more events occurred within a predetermined time period at a predetermined notification frequency;
• executing analysis processing on the information;
• deriving an occurrence frequency of the information;
• deriving a load of analysis processing of the information;
• controlling the predetermined notification frequency with a frequency lower than the occurrence frequency as an upper limit on the basis of an occurrence frequency of the information;
• and
• recording the information notified from the distributed station in a storage in association with the notification time, and discarding the information from the storage when it is judged that the occurrence frequency of the information is less than a predetermined threshold value.