Moving-body communication device

Details Moving-body communication device Moving-body communication device

1998-07-15

1999-09-14

Hofsass, Jeffrey A.

Communications: electrical

External condition vehicle-mounted indicator or alarm

Highway information

340928, 340917, 340931, G08G 109

Patent

active

059529407

ABSTRACT:
When a vehicle-mounted device receives a FCM signal from a road-side communication device, the vehicle-mounted device receives or transmits a data signal in accordance with a link direction and a time slot specified by the FCM signal. When the vehicle-mounted device does not receive a signal to be received within an expected time, or when it transmits an ACK signal which is a last signal of communication, retry processing starts. In this retry processing, the vehicle-mounted device determines the contents of communication processing to be next carried out from both the contents of the signal transmitted from the road-side communication device and the contents of the last time communication processing.

REFERENCES:
patent: 5541928 (1996-07-01), Kobayashi et al.
patent: 5554984 (1996-09-01), Shigenaga et al.
patent: 5581249 (1996-12-01), Yoshida
patent: 5640156 (1997-06-01), Okuda et al.
patent: 5705996 (1998-01-01), Eguchi et al.
patent: 5751227 (1998-05-01), Yoshida et al.
patent: 5771008 (1998-06-01), Hayashi et al.
patent: 5777565 (1998-07-01), Hayashi et al.

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