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구분 출원국
출원년도 ~ 키워드

상세정보

등록 무선 센서망에서 노드의 클럭 주파수 오차에 둔감한 이동노드의 위치추정 방식

무선 센서망에서 노드의 클럭 주파수 오차에 둔감한 이동노드의 위치추정 방식
이미지 확대
발명자
남윤석, 허재두, 박광로
출원번호
12808394 (2008.07.30)
공개번호
20110119024 (2011.05.19)
등록번호
8862430 (2014.10.14)
출원국
미국
협약과제
초록
There is provided a method for estimating a position of a mobile node in a wireless sensor network. The method includes estimating a frequency offset between anchor nodes and estimating a difference between times when ranging frames from a mobile node are received by two anchor node, without use of a separate synchronization unit, such as a network synchronized clock supply unit that supplies a network synchronized clock via a cable, in a wireless sensor network, unlike a conventional method of estimating Time of Flight (TOF) using Two-Way Ranging (TWR) and Symmetric Double Sided-TWR (SDS-TWR) schemes. The estimated receiving time difference is directly applied to a Time Difference Of Arrival (TDOA) algorithm in order to estimate the position of the mobile node.
KSP 제안 키워드
Conventional methods, Double-sided, Mobile node(MN), SDS-TWR, Sensor networks, Synchronization Unit, Time Difference of Arrival(TDOA), Two-way ranging, Wireless sensor networks(WSNs), anchor nodes, difference of arrival, directly applied, frequency offset, time difference, time-of-flight(TOF), two-way, wireless sensor