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:
Mar. 27, 2012
Filed:
Apr. 30, 2008
Edgar H. Callaway, Jr., Boca Raton, FL (US);
David B. Taubenheim, Plantation, FL (US);
Edgar H. Callaway, Jr., Boca Raton, FL (US);
David B. Taubenheim, Plantation, FL (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A method () and cognitive radio (CR) wireless device () are provided for dynamically accessing spectrum in an opportunistic spectrum access wireless communication system (). The method includes: transmitting, from a CR wireless device, a signal () having a first bandwidth within an unoccupied portion of spectrum (), and after a time interval (T) following the transmitting, and upon determining that an adjacent spectral quantum is occupied, transmitting from the CR wireless device a signal () having a second bandwidth, the second bandwidth being less than the first bandwidth. The method doubles a rate of growth of bandwidth of a transmitted signal when a spectral quantum adjacent to one side of the signal is unoccupied and a spectral quantum adjacent to the other side of the signal is occupied. The method utilizes knowledge of location of the CR wireless device and of band-edges to intelligently use spectral fence quanta.