Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Wi-Fi-Based Low-Complexity Floor Number Determination Method Based for Multistory Buildings

다층 건물을 위한 Wi-Fi 기반의 저 복잡도 층간 위치 측위 기법

  • Shi, Jian (School of Electronic Engineering, Soongsil Univ.) ;
  • Li, Xiang (School of Electronic Engineering, Soongsil Univ.) ;
  • Jung, Honggyu (School of Electronic Engineering, Soongsil Univ.) ;
  • Kim, Jinoh (Dept. of Mechanical Engineering, Soongsil Univ.) ;
  • Shin, Yoan (School of Electronic Engineering, Soongsil Univ.)
  • 석건 (숭실대학교 정보통신공학부) ;
  • 리향 (숭실대학교 정보통신공학부) ;
  • 정홍규 (숭실대학교 정보통신공학부) ;
  • 김진오 (숭실대학교 기계공학과) ;
  • 신요안 (숭실대학교 정보통신공학부)
  • Received : 2013.09.03
  • Accepted : 2013.11.27
  • Published : 2014.02.01
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Abstract

Floor number determination has attracted considerable attention because many applications require accurate floor number information for providing better localization services in multistory buildings. This paper describes a Wi-Fi-based, low-complexity floor number determination method for multistory buildings. In our scheme, with the exception of floor ID and received signal strength of each WAP, detailed information on the wireless access point (WAP) coordinates is not needed. The multi-wall-floor model is used for the simulation and analysis. The simulation results show that the floor determination accuracy is nearly 100 given an adequate deployment density of WAPs on each floor. The results also show that the proposed method provides a good estimate of floor number even when only a few WAPs are implemented on each floor. Specifically, the proposed method can work under extreme conditions, i.e., where there are no WAPs on a floor.

최근 들어, 다층 건물 내 층간 위치 측위(Floor Determination)는 다양한 위치 기반 응용 서비스를 만족하기 위해 빠르게 해결해야 되는 문제가 되었다. 본 논문에서는 다층 건물 환경에서 Wi-Fi 신호를 기반으로 한 저복잡도 층간 위치 측위 기법을 제안한다. 제안 기법에서는 WAP(Wireless Access Point)에 대한 자세한 좌표 정보가 필요 없이, 사용자 단말기에 나온 각 WAP의 층수와 각 WAP의 수신 신호 세기(Received Signal Strength) 값만을 이용한다. 제안 기법의 성능을 검증하기 위해 본 논문에서는 Multi-Wall-Floor 모델을 사용하였으며, 모의실험 결과를 통해 각층의 WAP 배치 밀도가 충분히 높을 경우 제안 기법의 정확도가 100%에 도달함을 보였다. 그리고 각층의 WAP 수가 적은 경우에서도 우수한 층간 위치 측위 성능을 보였으며, 특히 심지어 WAP 가 하나도 없는 층이 있어도 층간 위치 측위가 가능한 것을 보임으로써 제안된 기법의 우수성을 확인하였다.

Keywords

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