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:
Oct. 19, 2010
Filed:
Jan. 09, 2007
Jong-hun Park, Suwon-si, KR;
Min-seop Jeong, Seoul, KR;
Woo-jong Park, Suwon-si, KR;
Min-q Kim, Seoul, KR;
Daeyoung Kim, Daejeon, KR;
Hyunhak Kim, Daegu, KR;
Jong-hun Park, Suwon-si, KR;
Min-seop Jeong, Seoul, KR;
Woo-jong Park, Suwon-si, KR;
Min-Q Kim, Seoul, KR;
Daeyoung Kim, Daejeon, KR;
Hyunhak Kim, Daegu, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A time synchronization method in a wireless sensor network, has an upper node that provides back-off scheduling to lower nodes in the wireless sensor network of a hierarchical structure. Each of the lower nodes synchronizes time according to the back-off scheduling based on its local clock. The time synchronous method also allows the number of packets required for synchronization in the wireless sensor network to sharply decrease, and the life time of the network to increase. Additionally, the time synchronous method provides a response packet from a lower node in response to a synchronization packet from an upper node, which is used as a synchronization start packet for secondary lower nodes, so that synchronization in the entire network is rapidly processed.