Journal of the Institute of Electronics Engineers of Korea CI (전자공학회논문지CI)

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A Formal Framework for Context-Aware System Modeling

상황인식 시스템 모델링을 위한 정형화 프레임워크

  • Cho, Eun-Sun (Dept. of Computer Sci. & Eng. Chungnam National University) ;
  • Min, Young-Mok (Dept. of Computer Sci. & Eng. Chungnam National University)
  • Published : 2009.03.25
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Abstract

Context-aware systems are reactive computing systems, aware of external context. Considering various sensors and actuators connected, application programming on top of such systems is known to be much more complex than in contentional ones. This paper suggests a formal framework for context-aware systems, by extracting their common properties. That makes a useful birds-eye view for the behaviors of a whole complex system, as a base for a convenient developing environment and systematic analysis. In this framework, reactive-ness is handled by event-condition-action rules and global state-transitions, which are essential in a lot of context-aware applications. In addition, behaviors of each elementary device are modelled with its own state-transitions, and tightly bound to the entire task.

상황인식 시스템은 이용자의 주변 상황을 인지해서 적절한 대응을 수행하는 시스템이다. 컴퓨터 외에도 각종 센서나 실행기들이 시스템에 연결되어 동작하게 되므로 전통적인 시스템과 상이하며 응용 프로그램 개발의 복잡성이 증가하는 것이 특징이다. 본 논문에서는 이러한 상황인식 시스템들이 공통적으로 가지고 있는 특징을 기반으로 하여 정형화된 프레임워크를 제시한다. 이것은 복잡한 전체 시스템을 조망할 수 있는 도구가 되며, 이를 반영한 시스템 개발 환경은 편의를 제공할 뿐 아니라, 유용한 분석의 기반이 되는 등의 장점들을 가진다. 제시된 프레임워크에서는 반응적 (reactive) 작업 수행을 위해 이벤트에 대한 규칙을 통해 동작하도록 정의하고, 많은 상황인식 응용 프로그램에서 인식하는 상태 전이 개념을 도입하였다. 또한, 각 장비의 상태 변화가 전체 작업 수행에 연결되어 모델링 될 수 있도록 하였다.

Keywords

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