Sensor network system, sensor node, sensor information collector, method of observing event, and program thereof
First Claim
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1. A sensor network system, comprising:
- a plurality of sensor nodes each including a sensor for detecting an event that has occurred, and a communicating facility configured to transmit sensor information indicating the event detected by said sensor at a timing corresponding to an influence that the event detected by said sensor exerts upon a sensor information distribution indicating a temporal distribution and a spatial distribution of said event; and
an application apparatus for employing said sensor information distribution, thereby to process said sensor information.
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Abstract
In a sensor network system, sensor data having a high precision (high resolution) is collected, and congestion of a communication network and an apparatus for processing the sensor data is suppressed. A sensor node has a contribution degree calculator for calculating an influence that the detected sensor information exerts upon the entire system precision (resolution). A first communicating circuit transmits sensor information responding to a calculated contribution so that no congestion caused by transmitting too large a quantity of data all at once occurs.
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Citations
35 Claims
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1. A sensor network system, comprising:
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a plurality of sensor nodes each including a sensor for detecting an event that has occurred, and a communicating facility configured to transmit sensor information indicating the event detected by said sensor at a timing corresponding to an influence that the event detected by said sensor exerts upon a sensor information distribution indicating a temporal distribution and a spatial distribution of said event; and an application apparatus for employing said sensor information distribution, thereby to process said sensor information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A sensor node, comprising:
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a sensor for detecting an event; and a communicating means for transmitting sensor information indicating the event detected by said sensor at a timing directly related to an influence that the event detected by said sensor exerts upon a sensor information distribution indicating a temporal distribution or a spatial distribution of the event. - View Dependent Claims (15, 16, 17, 18)
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19. A sensor information collector that is connected to a plurality of sensor nodes each comprising a sensor for detecting an event that has occurred, and receives sensor information indicating the event detected by said sensor, comprising:
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a receiving means for receiving the sensor information; and a data collecting means for, based upon said received sensor information, generating a sensor information distribution indicating a temporal distribution or a spatial distribution of the event; and further comprising; an estimating means for estimating, based upon the sensor information received from the other sensor node, or the sensor information that temporally or spatially neighbors sensor information that is deficient, and an event model that has been set, said event model obtained by making a modeling of the event that the sensor detects, said sensor information that is deficient, thereby to restore the sensor information distribution. - View Dependent Claims (20)
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21. An event observation method employing a sensor network system comprising a plurality of sensor nodes each including a sensor for detecting an event that has occurred, and an application apparatus for processing sensor information indicating the event detected by said sensor, the method comprising:
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an event detection step in which said sensor detects the event; a sensor information transmission step in which a communicating means of said sensor node transmits the sensor information at a timing corresponding to an influence that the event detected by said sensor in said event detection step exerts upon a sensor information distribution indicating a temporal distribution or a spatial distribution of said event; and a sensor information process step in which said application apparatus employs the sensor information distribution, thereby to process the sensor information. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A record medium having a program stored therein, said record medium being a computer-readable record medium, wherein said program is a sensor node program incorporated in and operable to cause a computer to perform a process of, in transmitting sensor information indicating an event detected by a sensor, more preferentially transmitting the sensor information that exerts a larger influence upon a sensor information distribution indicating a temporal distribution or a spatial distribution of the event.
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35. A record medium having a program stored therein, said record medium being a computer-readable record medium, wherein said program is a sensor information collection program that is installed in a computer that is connected to a plurality of sensor nodes each comprising a sensor for detecting an event that has occurred, and receives sensor information indicating the event detected by said sensor, said sensor information collection program causing said computer to perform a data collection process of, based upon the received sensor information, generating a sensor information distribution indicating a temporal distribution or a spatial distribution of the event.
Specification