Hitachi, Ltd.

Tsuyoshi Taniguchi

Masato Inagaki

Kenji Naka

Hiroki Hanawa

An unauthorized communication detection apparatus comprises: a reception module configured to receive operational data; a transmission module configured to transmit the operational data; an acquisition module configured to acquire a correction value for correcting a determination expression for calculating a score for determining whether the operational data is involved in unauthorized communication, based on a parameter for extending an application range of a specific learning model and on a specific feature amount corresponding to the specific learning model among a plurality of feature amounts of the operational data; a determination module configured to calculate the score based on the plurality of learning models, the plurality of feature amounts, and the correction value, and determine whether the operational data is involved in unauthorized communication based on the calculated score; and a transmission control module configured to control the transmission of the operational data based on a determination result.

Unauthorized communication detection apparatus and recording medium

In a mobile communication system, a base station controller has a handoff information management table for storing distance information for each mobile station notified from each of base stations and a detection unit for updating the handoff information management table each time a new handoff information was received from the base stations and detecting any of the mobile stations that is moving out of a service area into an out-of-communication range. The detection unit performs the out-of-range detection by selecting any of the mobile stations currently communicative only with one or more of the border cell base stations as a detection target and comparing the distance information in the handoff information management table with a predetermined threshold value.

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Fujisawa, Japan

Tsuyoshi Taniguchi