Sensor device, retrieval device, and relay device

Abstract

A sensor device is provided to comprise an address storage unit (107) for storing a channel address to be used, a temperature sensor (103), a table storage unit (101) for storing an address table in which a measured value and the channel address are made to correspond to each other, an address specify unit (102) for specifying the channel address corresponding to the measured value obtained from the temperature sensor (103), an address update unit (105) for updating the channel address of the address storage unit (107), a decision unit (108) for deciding whether or not inquiry data is addressed to the channel address stored in the address storage unit (107), a response making unit (106) for making response data responding to the inquiry data in case it is decided that the inquiry data is addressed to the channel address, and a communication unit (109) for sending the response data to a retrieval node (120).

Description

technical field [0001] The present invention relates to a sensing device that measures surrounding conditions, a retrieval device that retrieves the sensing device through a network, and a relay device that relays communication between the sensing device and the retrieval device. Background technique [0002] In the past, there was a sensor network that was used as a network system for observation of natural phenomena such as weather and temperature, situation investigation at the time of a disaster, inventory management, etc. In this sensor network, in order to realize wide-ranging services, an Internet Protocol (IP) network, for example, is used as a backbone device for connecting various components such as sensors and databases. [0003] And, in order to connect the sensors to the network, a sensor node is used, which, as a sensor device, integrates one or more sensors with network communication functions. [0004] In order to make full use of the sensor network, it is n...

AI Technical Summary

Problems solved by technology

[0023] Therefore, there is a problem that the update data from each sensor node is concentrated in the range frequency band immediately below the database system, compressing the frequency band, increasing the load on the processor on the database side, and hindering the assurance of scalability.

However, the pressure of the frequency band and the increase of the load have no upper limit with the increase of the number of sensor nodes, so the problem cannot be solved in essence.

Furthermore, due to the dependence on the length of the database update interval, the measured values ​​measured by the sensor will lose real-time performance, so the update interval cannot be increased.

And, of course, with this approach, a new database system must be imported and managed

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