On-vehicle device for road-vehicle communication

Details On-vehicle device for road-vehicle communication On-vehicle device for road-vehicle communication

1996-07-18

1998-07-07

Hofsass, Jeffery A.

Communications: electrical

Traffic control indicator

Combined

235384, 235375, 395213, G08G 100

Patent

active

057775656

ABSTRACT:
An on-vehicle device for road-vehicle communication includes a communication unit for exchanging information with an on-road device, and storage unit for storing necessary information. When a communication error occurs between the on-vehicle device and the on-road device, information regarding the communication error is stored in the storage unit. The vehicle device further includes a card read-write unit into which a control card is removably inserted. The control card has a storage area for storing the above-described error information and information necessary in the on-vehicle device. Via the card read-write unit, information stored in the storage unit is transferred to the storage area of the control card to be stored therein, and information stored in the storage area of the control card is transferred to the storage unit to be stored therein. Accordingly, when a communication error occurs between the on-vehicle device and the on-road device, information regarding the communication error is transferred from the storage unit to the control card, so that information regarding the communication error can be obtained from the on-road device via the control card.

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patent: 5710702 (1998-01-01), Hayashi et al.

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