DATA COLLECTION DEVICE, SENSOR TERMINAL, METADATA COLLECTION SYSTEM, METADATA COLLECTION METHOD, AND PROGRAM
An object is to provide a data collection device and the like capable of reducing a load on an IoT terminal in metadata transmission and power consumption associated with the metadata transmission. In the present invention, a controller is provided on a data collection side that collects metadata, the metadata transmitted from an IoT terminal is grasped, and the IoT terminal is instructed to reduce the transmission frequency of metadata that does not need high real-time property according to a sensor, the type of the IoT terminal, or the like. The IoT terminal transmits the metadata only at a window time (transmission timing, data size, metadata type, or the like) permitted by the metadata controller. As a result, the IoT terminal transmits the metadata only at a limited timing, and thus can reduce a transmission load and power consumption.
1 . A data collection device configured to collect metadata transmitted by a sensor terminal, the data collection device comprising
a controller configured to indicate, to the sensor terminal, a transmission frequency for each type of the metadata on a basis of types of the metadata.
2 . The data collection device according to claim 1 , wherein the controller is configured to not indicate, to the sensor terminal, the transmission frequency for a certain period of time.
3 . A sensor terminal configured to transmit metadata to a data collection device, the sensor terminal comprising
a transmitter configured to make a frequency of transmission different for each kind of the metadata according to a transmission frequency for each kind of the metadata indicated by the data collection device.
4 . The sensor terminal according to claim 3 , wherein the transmitter is configured to discard the metadata that has failed to be transmitted to the data collection device.
5 . (canceled)
6 . A metadata collection method for collecting metadata transmitted by a sensor terminal, the metadata collection method comprising:
indicating, to the sensor terminal, a transmission frequency for each type of the metadata on a basis of types of the metadata; and making a frequency at which the sensor terminal transmits the metadata different for each type of the metadata.
7 . The metadata collection method according to claim 6 , wherein the transmission frequency is not indicated to the sensor terminal for a certain period of time.
8 . (canceled)