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. 29, 2008
Filed:
Sep. 01, 2004
Kiyohide Yamashita, Yokohama, JP;
Yuji Nagano, Yokohama, JP;
Yuji Nomura, Yokohama, JP;
Hiroshi Ogura, Kawasaki, JP;
Kazuyoshi Nagai, Kawasaki, JP;
Takato Ohashi, Yokohama, JP;
Kanna Okamura, Yokohama, JP;
Kiyohide Yamashita, Yokohama, JP;
Yuji Nagano, Yokohama, JP;
Yuji Nomura, Yokohama, JP;
Hiroshi Ogura, Kawasaki, JP;
Kazuyoshi Nagai, Kawasaki, JP;
Takato Ohashi, Yokohama, JP;
Kanna Okamura, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A traffic management system manages, distributes, and controls various traveling states of vehicles at a high quality level. A vehicle-mounted unit performs an interconnection process for user authentication when entering a predetermined radio-wave zone. A radio unit disposed on a road sends interconnection process completion information to a center device when the interconnection process for connection to the vehicle is completed. If the vehicle does not connect to the radio unit after elapsed of a predicted time at which the vehicle is expected to travel across the radio unit, then the radio unit sends an overtime to the center device. The interconnection process completion information is received, the center device calculates a predicted time at which the vehicle is expected to pass across a radio unit, and sends the predicted time to the radio unit. When the overtime is received, the center device determines whether a fault has occurred or not. When it is judged that the fault has occurred, the center device sends alarm information to vehicles traveling near a site where the fault has occurred on the vehicle.