network state change detection system and traffic information storage device and network status change detection method and a traffic information storage program

摘要

PROBLEM TO BE SOLVED: To detect a change in network state in real time from packet information captured at a plurality of places on a path.;SOLUTION: In the present invention, a traffic information storage device acquires traffic information from a traffic information acquisition device and stores the correspondence of a plurality of passed times of day or received times of day corresponding to the same packet, a temporal difference between the plurality of passed times of day, and a plurality of passed times of day received from the same traffic information acquisition device in storage means in order of time series, and a network state change detection device extracts information associated with a specific traffic from the traffic information storage device on the basis of packet flow information, calculates a statistic value every designated unit time, and generates an alert when the calculated statistic value exceeds a designated threshold at a designated time.;COPYRIGHT: (C)2014,JPO&INPIT