Communications: electrical – Traffic control indicator – Combined
Patent
1995-11-01
1997-06-17
Hofsass, Jeffery
Communications: electrical
Traffic control indicator
Combined
340933, 340937, 235384, 455 541, G08G 100
Patent
active
056401566
ABSTRACT:
A mobile communication method wherein a pilot signal is repeatedly transmitted toward a communication zone. As an IU on a vehicle arrives at the communication zone, it transmits a pilot response signal in reply to the pilot signal. When the confirmation antenna receives the pilot response signal, a procedure relating to the confirmation of debiting is executed. When a given time period has passed after this procedure has terminated, the IU transmits an existence-in-second-gantry-zone signal in response to the pilot signal, if the vehicle still exists in the communication zone. By receiving the existence-in-second-gantry-zone signal, it can be ascertained that the vehicle having a confirmed debiting associated therewith exists in the communication zone. Even if a plurality of vehicles are running in the same lane side-by-side, each of these vehicles can be distinguished from one another. The mobile communication method may be similarly applied to any other moving body, as well as to a road vehicle.
REFERENCES:
patent: 4303904 (1981-12-01), Chasek
patent: 5086389 (1992-02-01), Hassett et al.
patent: 5310999 (1994-05-01), Claus et al.
patent: 5485520 (1996-01-01), Chaum et al.
Okuda Takehiko
Yagi Koichi
Hofsass Jeffery
Toyota Jidosha & Kabushiki Kaisha
Wu Daniel J.
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