Abstract:
PURPOSE: A system for searching a semantic service is provided to implement various services by sharing service concepts between a user and a developer after establishing sensor ontology and service ontology. CONSTITUTION: A USN(Ubiquitous Sensor Network) ontology module(11) includes actual data depending on the metadata of both a sensor ontology(11A) and a service ontology(11B). A semantic DBMS(DataBase Management System)(13) stores the metadata of both the sensor ontology and the service ontology. A semantic DB utility module(15) transfers the metadata to the semantic DBMS. The semantic DB utility model transfers the received query to the semantic DBMS.
Abstract:
PURPOSE: A system using a ubiquitous sensor network performing wireless communication service and a data transceiving method thereof are provided to offer information generated in a total network or user customized interest information regardless of the region where a user locates in real time. CONSTITUTION: An infra nodes(210) performs data relay among coordinators connected to a server node and a plurality of lower sensor end nodes. A poster nodes(212) is dispersed randomly within a ubiquitous sensor network. The poster nodes displays a specific event delivered through the infra node. A user mobile terminal node(214) is connected to the infra nodes. A Zigbee transceiving a signal to the user mobile terminal node is installed.
Abstract:
A system and a method for keeping and receiving a parcel using RFID(Radio Frequency Identification) are provided to keep a parcel in an unmanned parcel storage unit safely and conveniently using an RFID tag attached to the parcel even though a recipient is absent. A parcel storage unit(100) includes an RFID reader(120), a data converter(130), a controller(140), and a locking device(110). The RFID reader receives information of an RFID tag attached to a parcel. The data converter converts the received RFID tag information into a predetermined code and stores the code in a memory. The controller controls opening and closing of a door of the parcel storage unit in connection with the code of the data converter.
Abstract:
An indoor localization system and a method thereof are provided to prevent children's accidents by finding out the children's position based on wireless position recognition technology and showing children's approaching to a dangerous factor in advance. A method for preventing children's accidents by showing children's approaching to a dangerous factor in advance includes the steps of: emitting a signal from a tag attached to the children(S52); receiving the signal of the tag by each receiver and detecting the distance between the receiver and the tag; transmitting the detected distance value from the receiver to a server(S54); gathering the detected distance value by the server and calculating the position of the tag; deciding whether the children are dangerous by comparing the position of the tag with the position of the dangerous factor(S56); and showing danger from the server if the children are dangerous(S57).