NETWORK SYSTEM AND COMMUNICATION LOG ANALYSIS SYSTEM

PROBLEM TO BE SOLVED: To provide means that associates a location where a terminal uses communication or travel route in use of the communication, with a connection destination of the terminal, in mobile communication.SOLUTION: A communication log analysis system aggregates and analyzes communication logs collected by network devices that constitute a mobile network. The communication log analysis system estimates a travel route of a mobile terminal connected to the network using: log information generated by a base station to be wirelessly connected to the mobile terminal when the mobile terminal starts the connection to the network, log information generated by a base station to be wirelessly connected to the mobile terminal for a handover when the mobile terminal executes the handover, and log information generated by a base station connected to the mobile terminal at the time of disconnection from the wireless connection.