The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Bluetooth Beacon Planing Considering Position Estimation Accuracy in Small and Isolated In-Door Environment

소형독립공간에서 실내측위 정확도를 고려한 블루투스 비컨 위치선정

  • Ahn, Heejune (SeoulTech, Department of Electrical and Information Engineering) ;
  • Thuy, Tran Vinh (SeoulTech, Department of Electrical and Information Engineering) ;
  • Lee, Ye Hoon (SeoulTech, Department of Electric & IT Media Engineering)
  • Received : 2015.06.22
  • Accepted : 2015.07.06
  • Published : 2015.07.31
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Abstract

The recent adoption of Bluetooth LE technology in smart phones triggered commercial interest in RSSI-based positioning technology. Estimation error in RSSI measurement due to the antenna pattern, multipath fading, environmental noise has to be considered for designing beacon systems. The paper proposes an analysis method and beacon planning rules for a small and isolated indoor service area, based on probabilistic model of RSSI estimation error. As an practically important guide, the beacons have to be installed at the boundary of the service area to minimize the maximum position error, whereas the beacons have to be evenly distributed in the service space to minimize the average estimation error.

최근 스마트폰에 블루투스 LE의 적용을 계기로, 블루투스 비컨의 RSSI 기반 거리측정 기법에 의한 실내 측위 방법이 실용적인 측면에서 새로운 관심을 받고 있다. 정확한 위치정보의 계산을 위해서는 RSSI 측정은 안테나 패턴의 불규칙성, 환경의 영향, 동적인 사람의 움직임 등에 따른 오차를 고려해서 비컨의 위치를 결정하여야 한다. 본 논문은 비컨 송신기의 위치에 따른 RSSI/거리 확률모델을 바탕으로, 소형 서비스 공간에서의 측정의 정확성을 예측하고 보장하는 방안을 제시하였다. 그 결과, 전체공간상에서 평균적인 정확도를 최대화하기 위해서는 서비스공간에 골고루 신호가 도달할 수 있도록 분산해서 배치하는 것이 효과적인 반면, 측위오차의 최대치를 줄기위해서는 해당공간의 가장자리에 위치하는 것이 효과적임을 보였다.

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  3. 초음파와 RF를 이용한 실내 측위 시스템 vol.42, pp.2, 2017, https://doi.org/10.7840/kics.2017.42.2.413