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. 12, 2010
Filed:
Sep. 30, 2009
Thua Van Ho, Mississauga, CA;
Daniel Terrier, Toronto, CA;
Roger Tong, Oakville, CA;
Wai-cheung Tang, Mannheim, CA;
Japjeev Kohli, Waterloo, CA;
Thua Van Ho, Mississauga, CA;
Daniel Terrier, Toronto, CA;
Roger Tong, Oakville, CA;
Wai-Cheung Tang, Mannheim, CA;
Japjeev Kohli, Waterloo, CA;
Mark IV Industries Corp., Mississauga, Ontario, CA;
Abstract
An electronic toll collection system wherein the reader includes a switching network and a plurality of transceivers operating under the control of a controller. The reader further includes failure detection circuitry for determining whether any of the transceivers have failed based upon the RF outputs of the transceivers. If the controller determines that a transceiver has failed, then it alters the switching pattern such that the switching network excludes the failed transceiver from being connected to the antennas. The reader thereby provides for adaptive RF channel assignment, as the particular transceiver used to excite a particular antenna may be dynamically altered, and the provision of at least two transceivers in the reader ensures transceiver redundancy.