Information processing apparatus, information processing method, and computer readable medium

An information processing apparatus comprising:

• processing circuitry:
• to predict as a prediction parameter value, a future parameter value of each of a plurality of types of time synchronization parameters each of which is used for time synchronization calculation which is calculation for synchronizing times of two devices;
• and
• when a measured parameter value which is a measured value corresponding to the prediction parameter value is generated with elapse of time, to calculate as a prediction error, a difference between the measured parameter value and the prediction parameter value, for each of the time synchronization parameters;
• wherein
• the measured parameter value of each of the time synchronization parameters is generated at a generation timing that repeatedly arrives, and
• the processing circuitry predicts for each of time synchronization parameters, n (n≥1) prediction parameter values of n future generation timings, based on m (m≥1) measured parameter values of m past generation timings, using a learning model obtained by machine learning.

An information processing apparatus comprising:

• processing circuitry:
• to predict as a prediction parameter value, a future parameter value of each of a plurality of types of time synchronization parameters each of which is used for time synchronization calculation which is calculation for synchronizing times of two devices;
• when a measured parameter value which is a measured value corresponding to the prediction parameter value is generated with elapse of time, to calculate as a prediction error, a difference between the measured parameter value and the prediction parameter value, for each of the time synchronization parameters;
• to calculate an abnormality degree indicating possibility that an abnormality is included in the measured parameter value, using the prediction error, for each of the time synchronization parameters;
• and
• to specify a time synchronization parameter having the maximum abnormality degree as an abnormality inclusion time synchronization parameter, based on an assumption that an abnormality is included in a measured parameter value of a time synchronization parameter having the maximum abnormality degree among the plurality of types of time synchronization parameters, and to estimate a cause of the abnormality assumed to be included in the measured parameter value of the abnormality inclusion time synchronization parameter.

An information processing method comprising:

• predicting as a prediction parameter value, a future parameter value of each of a plurality of types of time synchronization parameters each of which is used for time synchronization calculation which is calculation for synchronizing times of two devices;
• when a measured parameter value which is a measured value corresponding to the prediction parameter value is generated with elapse of time, calculating as a prediction error, a difference between the measured parameter value and the prediction parameter value, for each of the time synchronization parameters;
• calculating an abnormality degree indicating possibility that an abnormality is included in the measured parameter value, using the prediction error, for each of the time synchronization parameters;
• and
• presenting the plurality of types of time synchronization parameters in descending order of the abnormality degree.

A non-transitory computer readable medium storing an information processing program causing a computer to execute:

• a parameter value prediction process to predict as a prediction parameter value, a future parameter value of each of a plurality of types of time synchronization parameters each of which is used for time synchronization calculation which is calculation for synchronizing times of two devices;
• a prediction error calculation process, when a measured parameter value which is a measured value corresponding to the prediction parameter value is generated with elapse of time, to calculate as a prediction error, a difference between the measured parameter value and the prediction parameter value, for each of the time synchronization parameters;
• an abnormality degree calculation process to calculate an abnormality degree indicating possibility that an abnormality is included in the measured parameter value, using the prediction error, for each of the time synchronization parameters;
• and
• a presentation process to present the plurality of types of time synchronization parameters in descending order of the abnormality degree.