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. 22, 2009
Filed:
Mar. 21, 2007
Koji Ara, Kodaira, JP;
Yuji Ogata, Hachioji, JP;
Shunzo Yamashita, Musasino, JP;
Takanori Shimura, Chiba, JP;
Koji Ara, Kodaira, JP;
Yuji Ogata, Hachioji, JP;
Shunzo Yamashita, Musasino, JP;
Takanori Shimura, Chiba, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention achieves lower electric power consumption of a sensor node for carrying out an intermittent operation, in a sensor net system. A time when the sensor node transmits a signal to a base station is estimated. Then, in accordance with the estimation, a table for storing a signal transmitted from the sensor node is installed in a wireless section of the base station. Consequently, a communication time between the sensor node and the base station can be made shorter. Also, a start time of a micro computer is set for RTC inside the sensor node, so the micro computer inside the sensor node can be put in the standby state.