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:
Jan. 26, 1999
Filed:
Jan. 17, 1997
Douglas Dwyer, Brea, CA (US);
Stephen J Feitelson, Corona, CA (US);
Robert H Kramp, II, Fullerton, CA (US);
Patrick P Lim, Hacienda Heights, CA (US);
Raytheon Company, Lexington, MA (US);
Abstract
Data transmissions between a transponder and a reader of a toll collection system are minimized while the transponder moves through a communication zone of the system. A plurality of dimensionally programmable detection regions, are defined within the communication zone. Detection criteria are also defined that indicate whether the transponder transitions into, out of, or both into and out of one of a plurality of 'in' detection regions. Then it is determined if the current geolocation of the transponder is within any of the detection regions. The current location of the transponder is compared to the previous location of the transponder. If a change in the location of the transponder occurs and one of the detection criteria has been met, a detection region report message is generated. The detection region report message is sent to an application processor for processing, and if the transponder moves out of any of the 'in' detection regions, the application processor drops the communications link to that transponder. This minimizes the amount of processing and data transfer between the transponders and the reader and processor.