PURPOSE: A context awareness middleware system is provided to process information accurately by reducing the number of interfaces between the context awareness middle ware system and a user. CONSTITUTION: A sensor network unit(100) outputs the result of user command processing and collects information which are collected by sensors. A sensor node unit(110) perform a communication function with a sensor in order to observe physical phenomenon. A sensor unit(120) collects physical data. An actuator(130) controls mechanism or a system. The sensor network unit includes ID which is not overlapped with other ID.
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