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:
Jun. 18, 2013
Filed:
Sep. 02, 2010
Seung Ki Hong, Daejeon, KR;
Jong Arm Jun, Daejeon, KR;
Cheol Sig Pyo, Daejeon, KR;
Sang Hun Lee, Seoul, KR;
Lynn Choi, Seoul, KR;
Seung Ki Hong, Daejeon, KR;
Jong Arm Jun, Daejeon, KR;
Cheol Sig Pyo, Daejeon, KR;
Sang Hun Lee, Seoul, KR;
Lynn Choi, Seoul, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Korea University Research & Business Foundation, Seoul, KR;
Abstract
Provided are a communication method and system for sensor network. In reporting event occurrence in a real-time sensor network application, a cycle time is divided into an event announcement period and a data transmission period to provide real-time transmission performance and energy efficiency. Each of the periods is again divided into the number of slots equal to the maximum depth of a network. Respective nodes sequentially operate according to their depths in a routing tree during the event announcement period to receive the signal transmitted from the lower node. To remove sleep delay, a slot next to the signal reception slot becomes a signal transmission slot. A node sensed an event transmits a signal informing event occurrence during its signal transmission slot, and this signal includes only the address of the transmission node. When a signal does not exist in the event announcement period, no traffic occurs in the data transmission period and the upper nodes maintain a sleep state. When a signal is transmitted during the event announcement period, nodes transmitting/receiving a corresponding signal operate during the data transmission period to transfer data packets.