Patent ID: 11863418
Assignee: FUJITSU LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 5:
6. A non-transitory computer-readable storage medium storing a program that causes a computer to execute a process, the process comprising:
identifying, for each target period of target periods, a prediction value to be a reference for determining whether an anomaly occurs in the target period;
acquiring a first correction coefficient from a ratio, the ratio being actual measured values of a second target period to a second prediction value of the second target period, the second target period being before a first target period;
identifying a corrected prediction value by multiplying a first prediction value of the first target period of the target periods by the first correction coefficient;
setting one of the first prediction value and the corrected prediction value as an upper limit value;
setting one of the first prediction value and the corrected prediction value as a lower limit value such that the lower limit value is different from the upper limit value;
monitoring a computer network in the first target period;
determining whether the anomaly occurs within the computer network in the first target period based on that a first anomaly degree and a second anomaly degree arc being between the upper limit value and the lower limit value, the first anomaly degree being a value of a measured value in the first target period minus the first prediction value, the second anomaly degree being a value of the actual measured value in the first target period minus the corrected prediction value;
determining whether to multiply the first correction coefficient with a third prediction value of a third target period to acquire a third corrected prediction value of the third target period of the target periods, the third target period being after the first target period;
setting a second upper limit value and a second lower limit value based on the third corrected prediction value and the third prediction value.