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:
Jun. 23, 1998
Filed:
Oct. 04, 1996
Hironao Hayashi, Motosu-gun, JP;
Kan Watanabe, Nishikamo-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A mobile unit communication control method is for exchanging information accurately between a plurality of responders and a questioner in a communication area without information drop-off. A ground unit constituting the questioner transmits an inquiry signal. A vehicle-mounted unit constituting the responder stores and returns the current time the vehicle-mounted unit first received the inquiry signal as a starting time. The ground unit selects a vehicle-mounted unit with the earliest starting time as an object of communication among a plurality of the vehicle-mounted units. A vehicle-mounted unit expected to pass the communication area at the earliest time is selected, and the ground unit transmits a response signal for handshaking with the particular vehicle-mounted unit, to which the vehicle-mounted unit replies. With the establishment of the handshake, data are exchanged between the ground unit and the vehicle-mounted unit.