Mitsubishi Electric Corporation

Jin Kawasaki

Nobuhiro Kobayashi

Kazuhiro Komatsu

Masaki Higuchi

Yoshinori Nakajima

Teruyoshi Yamaguchi

Tsunato Nakai

Tomooki Ukiana

Toshihiro Mega

Nobuaki Tasaki

Taiki Kobayashi

Naoya Fukuoka

Hiroyasu Tabata

Takehisa Miwa

A collection unit () collects a plurality of sensor values at a plurality of measurement points from a plurality of sensors provided to the plurality of measurement points, and per measurement point, accumulates environmental information data including a sensor value, in an accumulation unit (). An interpolation unit () finds a sensor value at a virtual point based on one sensor value or more obtained by one sensor or more. A management unit () accumulates environmental information data including the sensor value at the virtual point, in the accumulation unit.

Environmental information management system

In the present invention, unauthorized access from outside a facility to a device disposed inside the facility is detected by effectively using the output from a mirror port of a network switch. A gateway device has: a monitored data acquisition unit for saving in a monitored data storage unit, as monitored data, packet data that is outputted from a mirror port of a switch, the packet data being outputted from a device being monitored; an unauthorized access detection unit for detecting unauthorized access by determining whether the monitored data is abnormal on the basis of a comparison between the monitored data and assessment rules; and an unauthorized access notification unit for notifying a server of a monitoring center, which is connected to an external network via an external communication unit, that unauthorized access has been detected.

Relay apparatus, network monitoring system, and program

Growing community of inventors

Tokyo, Japan

Jin Kawasaki