The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2014
Filed:
Jul. 11, 2008
Chang Sub Shin, Daejeon, KR;
Gwang Ja Jin, Daejeon, KR;
SO Young Hwang, Busan, KR;
Yoonmee Doh, Daejeon, KR;
Bong Soo Kim, Daejeon, KR;
Cheol Sig Pyo, Daejeon, KR;
Jong-suk Chae, Daejeon, KR;
Chang Sub Shin, Daejeon, KR;
Gwang Ja Jin, Daejeon, KR;
So Young Hwang, Busan, KR;
Yoonmee Doh, Daejeon, KR;
Bong Soo Kim, Daejeon, KR;
Cheol Sig Pyo, Daejeon, KR;
Jong-Suk Chae, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
A time synchronization method in a wireless sensor network, a low power routing method using a reservation scheme, and an apparatus for performing the method are provided. The time synchronization method in the wireless sensor network may include: receiving a first synchronization request command packet from a parent node that manages time synchronization for a predetermined synchronization region; receiving, from the parent node, a second synchronization request command packet that has a transmission timestamp value of the first synchronization request command packet; and performing time synchronization for a child node based on a reception time of the first synchronization request command packet, a reception time of the second synchronization request command packet, and the transmission timestamp value of the first synchronization request command packet.