• Journal of Korea Spatial Information System Society
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• v.11 no.1
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• pp.43-54
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• 2009

As R&D(Research and Development) is going on actively to develop technologies for the ubiquitous computing environment, which Is the human-oriented future computing environment, GIS dealing with spatio-temporal data is emerging as a promising technology. This also increases the necessity of the middleware for providing services to give interoperability in various heterogeneous environments. The core technologies of the middleware are real-time processing technology of data streams coming unceasingly from positioning systems and data stream processing technology developed for non-spatio-temporal data. However, it has problems in processing queries on spatio-temporal data efficiently. Accordingly, this paper designed and implemented the spatio-temporal middleware that provides interoperability between a mobile spatio-temporal DBMS(DataBase Management System) and a server spatio-temporal MMDBMS(Main Memory DataBase Management System). The spatio-temporal middleware maintains interoperability among heterogeneous devices and guarantees data integrity in query processing through real-time processing of unceasing spatio-temporal data streams and two way synchronization of spatio-temporal DBMSs. In addition, it manages session for the connection of each spatio-temporal DBMS and manages resources for its stable operation. Finally, this paper proved the usability of the spatio-temporal middleware by applying it to a real-time position tracking system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.5
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• pp.159-166
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• 2008

Recently, according to the rapid development of location positioning technology and wireless communications technology and increasement of usage of moving object data, many researches and developments on the real-time locating systems which provides real time service of moving object data stream are under proceeding. However, MO (Moving Object) DBMS used based system in the in these systems is the inefficient management of moving object data streams, and the existing DSMS (Data Stream Management System) has problems that spatio-temporal data are not handled efficiently. Therefore, in this thesis, we designed and implemented spatio-temporal DSMS for efficient real-time management of moving object data stream. This thesis implemented spatio-temporal DSMS based STREAM (STanford stREam dAta Manager) of Stanford University is supporting real-time management of moving object data stream and spatio-temproal query processing and filtering for reduce the input loading. Specifically, spatio-temporal operators of the spatio-temporal DSMS support standard interface of SQL form which extended "Simple Feature Specification for SQL" standard specifications presented by OGC for compatibility. Finally, implemented spatio-temporal DSMS in this thesis, proved the effectiveness of the system that as applied real-time monitoring areas that require real-time locating of object data stream DSMS.

• 한국공간정보시스템학회:학술대회논문집
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• 2007.06a
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• pp.9-14
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• 2007

오늘날 모바일 장치 기술, 위치 측위 기술, 무선 통신 기술 등이 급속도로 발달하고 이동체 위치 데이타가 널리 활용됨에 따라 차량 관리 시스템, 차량 배차 및 제어 시스템 등과 같은 이동체 위치 데이타를 실시간으로 서비스하기 위한 시스템이 개발되고 있다. 그러나 이러한 시스템에서 기반 시스템으로 사용되는 MO(Moving Object) DBMS 같은 이동체 관리 시스템은 이동체의 실시간 스트림 관리에 비효율적이고, 기존의 DSMS(Data Stream Management System)와 같은 스트림 관리 시스템은 공간 데이터를 효율적으로 처리하지 못하고 있다. 따라서, 본 논문에서는 이동체 위치 데이타의 효율적인 실시간 관리를 위한 시공간 DSMS를 설계 및 구현하였다. 본 논문에서 구현한 시공간 DSMS는 스탠포드 대학의 STREAM(STanford stREam dAta Manager)을 기반으로 이동체 위치 데이타의 실시간 관리와 공간 및 시공간 질의 처리 기능을 지원하는 시스템이다. 특히, 시공간 DSMS에서 사용하는 시공간 함수는 호환성을 위해서 OGC에서 제시한 "SQL을 위한 심플 피쳐 명세"를 따르는 표준 인터페이스를 지원한다. 마지막으로 본 논문에서 구현한 시공간 DSMS를 이동체 위치 데이타의 실시간 관리가 필요한 실시간 모니터링 분야에 적용해 봄으로써 시스템의 효용성을 입증하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.145-152
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• 2010

With the recent development of the ubiquitous computing technology, there are increasing interest and research in technologies such as sensors and RFID related to information recognition and location positioning in various ubiquitous fields. Especially, RTLS(Real-Time Locating Services) dealing with spatio-temporal data is emerging as a promising technology. For these reasons, the ISO/IEC published the RTLS standard specification for compatibility and interoperability in RTLS. Therefore, in this paper, we designed and implemented Spatio-temporal Query Processing Systems for efficiently managing and searching the incoming Spatio-temporal data stream of moving objects. Spatio-temporal Query Processing Systems's spatio-temporal middleware maintains interoperability among heterogeneous devices and guarantees data integrity in query processing through real time processing of unceasing spatio-temporal data streams and two way synchronization of spatio-temporal DBMSs. Web Server uses the SOAP(Simple Object Access Protocol) message between client and server for interoperability and translates client's SOAP message into CQL(Continuous Query Language) of the spatio-temporal middleware. Finally, this thesis proved the utility of the system by applying the spatio-temporal Query Processing Systems to a real-time Locating Services.