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성과물

특허 검색
구분 출원국
출원년도 ~ 키워드

상세정보

등록 무선센서네트워크에서의 시각 동기화 방법

무선센서네트워크에서의 시각 동기화 방법
이미지 확대
발명자
김경태, 최정단, 김도현, 유재준, 장정아, 김정숙, 임재한, 장병태, 성경복
출원번호
12743310 (2008.06.12)
공개번호
20100260167 (2010.10.14)
등록번호
8571008 (2013.10.29)
출원국
미국
협약과제
07MD1500, USN 인프라 기반 텔레매틱스 응용 서비스 기술개발, 박종현
초록
The present invention relates to a time synchronization method in a wireless sensor network. In the present invention, if an upper node requests a lower reference node to start time synchronization, the lower reference node broadcasts a first sync reference packet. The upper node receives the first sync reference packet and transmits the first sync reference packet reception time to the lower reference node. The lower reference node broadcasts the first sync reference packet reception time, such that the other nodes perform time synchronization on the basis of the first sync reference packet reception time. Meanwhile, the lower reference node estimates the first sync reference packet reception time of the upper node to calculate the reception estimation time, and transmits the reception estimation time to a determination node that is two hops anterior to the lower reference node. Therefore, the determination node compares the reception time received from the upper node and the reception estimation time received from the lower reference node and determines whether a capture attack on the upper node has occurred.
KSP 제안 키워드
Reference nodes, Sensor networks, Static wireless sensor networks(WSNs), Time synchronization, packet reception, synchronization method, wireless sensor