Nippon Telegraph and Telephone Corporation

Takuma Otsuka

Yusuke Tanaka

Hitoshi Shimizu

Takayuki Suyama

Hiroshi Sawada

Yoshinari Shirai

Tomoharu Iwata

Shin Mizutani

Tatsushi Matsubayashi

Yasue Kishino

Futoshi Naya

Naonori Ueda

A sensor node connected to a server device through a communication network includes an acquisition unit configured to acquire sensor data from a sensor included in the sensor node, an identification unit configured to classify the sensor data into a plurality of classes to identify occurrence of a predetermined event based on the sensor data and an identification model created by the server device in advance, a certainty degree calculation unit configured to calculate a degree of certainty of the sensor data as an indicator representing uncertainty of a result of the identification based on the result of the identification, and a transmission unit configured to select sensor data having a minimum degree of certainty from a transmission buffer in which the sensor data and the degree of certainty of the sensor data are stored in association with each other, and transmit the selected sensor data to the server device.

Sensor node, server apparatus, identification system, method and program

The present disclosure relates to an apparatus and methods of estimating a traffic volume of moving objects. In particular, the present disclosure estimates the traffic volume based on amounts of traffic volume of the moving objects observed at observation points based on a routing matrix and a visitor matrix. The routing matrix indicates whether moving objects that pass through specific waypoints are to be observed at an observation point. The visitor matrix indicates whether a moving object departing or arriving at the observation point. The present disclosure enables estimating a traffic volume of moving objects on various routes based on observed data with errors in data and varying lengths in observation periods.

Estimation apparatus, estimation method and program

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Tokyo, Japan

Takuma Otsuka