등록
무선 센서망에서 수동모드 단방향 거리추정 방식에 의한 이동 노드의 위치 추정 방법
- 발명자
-
남윤석, 허재두, 박광로
- 출원번호
-
12866917 (2008.10.10)
- 공개번호
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20110007650 (2011.01.13)
- 등록번호
- 8543132 (2013.09.24)
- 출원국
- 미국
- 협약과제
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07MH2800, 무선홈네트워크 기반 HD급 멀티미디어 시스템 개발,
허재두
- 초록
- The present invention relates to a method of estimating the position of a mobile node in a wireless sensor network using a passive mode OWR method. The method includes: estimating frequency offsets of anchor nodes and a mobile node; allowing the anchor nodes to sequentially transmit ranging frames; allowing the mobile node to receive the ranging frames and to estimate the difference between the reception times of signals from two anchor nodes; and applying the estimated difference between the reception times of the signals to time difference of arrival (TDOA) to estimate the position of the mobile node. According to the above-mentioned structure of the present invention, a plurality of mobile nodes can estimate their positions with a minimum number of ranging frame transmissions, without using a separate network synchronization unit. In addition, it is possible to easily construct a wireless sensor network for position recognition, and rapidly and accurately perform distance estimate using an OWR method.