TRAFFIC ANALYSIS DEVICE, TRAFFIC ANALYSIS METHOD, TRAFFIC ANALYSIS PROGRAM, AND COMMUNICATION SYSTEM

摘要

To appropriately analyze traffic even if traffic to be analyzed increases in a network to be controlled.SOLUTION: A traffic analysis device for analyzing traffic of a switch which relays data transmitted and received in communication between communication devices for each flow comprises: an acquisition unit for acquiring a communication amount per unit time for each of the flows from the switch; a calculation unit for calculating an abnormality degree for each of the flows on the basis of a difference between a predicted communication amount predicted on the basis of the previous communication amount acquired last time and a current communication amount acquired this time; and an analysis unit, on the basis of the abnormality degree and a topology value corresponding to a topology of the flow, for calculating a priority for each of the flows, selecting a flow with the high priority among the calculated priorities for each of the flows, and analyzing the traffic of the selected flow.SELECTED DRAWING: Figure 6