REMOTE MONITORING SYSTEM, NETWORK INTERCONNECTION DEVICE AND COMMUNICATION CONTROL METHOD
First Claim
1. A network interconnection device in a remote monitoring system including one or a plurality of sensor equipped communication terminals, the network interconnection device configured to communicate with the sensor equipped communication terminal through a first network, and a monitoring center configured to communicate with the network interconnection device through a second network, the network interconnection device comprising:
- a receiving unit configured to receive measurement data measured at the sensor equipped communication terminal;
a determining unit configured to sort the received measurement data into first data to be sent in priority over other data and second data not necessarily to be sent in priority over other data;
a first data accumulating unit configured to accumulate the first data;
a second data accumulating unit configured to accumulate the second data;
a transmission buffer configured to store the first data in priority in sending the first data accumulated in the first data accumulating unit and the second data accumulated in the second data accumulating unit to the second network;
a transmitting unit configured to sequentially read the first data and the second data stored in the transmission buffer and send the first data and the second data to the second network; and
a transmission control unit configured to dynamically control an inlet rate in causing the first data accumulated in the first data accumulating unit and the second data accumulated in the second data accumulating unit to come in the transmission buffer based on a communication rate of the second network.
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Accused Products
Abstract
Even though a network with communication rate large fluctuations is applied to a remote monitoring system, data communication delay time is kept smaller for which a shorter communication delay time is demanded and a high throughput is implemented. A sensor equipped terminal sends measurement data to a network interconnection device. A priority level determining unit of the device sorts the data into first data necessary to be delivered to a monitoring center within requested communication delay time and second data not necessarily to be delivered to the center within requested communication delay time. A transmission buffer unit is a buffer storing the first and second data accumulated in first and second data accumulating units in sending the data to a wide area network by FIFO. A transmission control unit dynamically controls a rate in causing the data to come in the transmission buffer unit based on a network communication rate.
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Citations
15 Claims
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1. A network interconnection device in a remote monitoring system including one or a plurality of sensor equipped communication terminals, the network interconnection device configured to communicate with the sensor equipped communication terminal through a first network, and a monitoring center configured to communicate with the network interconnection device through a second network, the network interconnection device comprising:
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a receiving unit configured to receive measurement data measured at the sensor equipped communication terminal; a determining unit configured to sort the received measurement data into first data to be sent in priority over other data and second data not necessarily to be sent in priority over other data; a first data accumulating unit configured to accumulate the first data; a second data accumulating unit configured to accumulate the second data; a transmission buffer configured to store the first data in priority in sending the first data accumulated in the first data accumulating unit and the second data accumulated in the second data accumulating unit to the second network; a transmitting unit configured to sequentially read the first data and the second data stored in the transmission buffer and send the first data and the second data to the second network; and a transmission control unit configured to dynamically control an inlet rate in causing the first data accumulated in the first data accumulating unit and the second data accumulated in the second data accumulating unit to come in the transmission buffer based on a communication rate of the second network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A remote monitoring system comprising:
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one or a plurality of sensor equipped communication terminals; a network interconnection device configured to communicate with the sensor equipped communication terminal through a first network; and a monitoring center configured to communicate with the network interconnection device through a second network, wherein; the sensor equipped communication terminal sends measured measurement data to the network interconnection device; and the network interconnection device includes; a determining unit configured to sort the received measurement data into first data to be sent in priority over other data and second data not necessarily to be sent in priority over other data; a first data accumulating unit configured to accumulate the first data; a second data accumulating unit configured to accumulate the second data; a transmission buffer configured to store the first data in priority in sending the first data accumulated in the first data accumulating unit and the second data accumulated in the second data accumulating unit to the second network; a transmitting unit configured to sequentially read the first data and the second data stored in the transmission buffer and send the first data and the second data to the second network; and a transmission control unit configured to dynamically control an inlet rate in causing the first data accumulated in the first data accumulating unit and the second data accumulated in the second data accumulating unit to come in the transmission buffer based on a communication rate of the second network.
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15. A communication control method for a remote monitoring system including one or a plurality of sensor equipped communication terminals, a network interconnection device configured to communicate with the sensor equipped communication terminal through a first network, and a monitoring center configured to communicate with the network interconnection device through a second network, the communication control method causing the network interconnection device to perform:
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receiving measurement data measured at a sensor equipped communication terminal; sorting the received measurement data into first data to be sent in priority over other data and second data not necessarily to be sent in priority over other data; accumulating the first data and the second data; storing the first data in priority in a transmission buffer in sending the accumulated first data and the accumulated second data to the second network; sequentially reading the first data and the second data stored in the transmission buffer to send the first data and the second data to the second network; and dynamically controlling an inlet rate in causing the accumulated first data and the accumulated second data to come in the transmission buffer based on a communication rate of the second network.
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Specification