Vehicle to roadside communication system for determining equipme

Details Vehicle to roadside communication system for determining equipme Vehicle to roadside communication system for determining equipme

1995-05-30

1997-09-09

Hofsass, Jeffery

Communications: electrical

External condition vehicle-mounted indicator or alarm

Highway information

340928, 235384, 455 677, 455521, G08G 109

Patent

active

056661096

ABSTRACT:
On the side of a vehicle, when the CRC error check of received data is performed (S19) and an error occurs plural times (S21, S22), it can be determined that an on-vehicle down link is defective (S23). Furthermore, the results of the CRC error check are stored, and at the time of an up link communication (S14), the results are sent to another road side equipment. Thus, in the road side equipment, a down link error of the other road side equipment can be detected on the basis of the sent information. Moreover, information as to whether or not a signal regarding a link which the car has passed is received from a beacon (S23) is stored, and this is sent in the up link communication (S14), whereby an abnormal road side equipment can be detected on the basis of the sequence of this link. In addition, an up link problem on the side of the car can be detected from the fact that specific information cannot be received (S26).

REFERENCES:
patent: 4466125 (1984-08-01), Kanayama
patent: 5245346 (1993-09-01), Nishimura et al.
patent: 5289183 (1994-02-01), Hassett et al.
patent: 5424727 (1995-06-01), Shieh
patent: 5485520 (1996-01-01), Chaum et al.
patent: 5537672 (1996-07-01), Grabow et al.
Patent Abstracts of Japan, vol. 16, No. 517, 23 Oct. 1992 & JP-A-04 192626 (Fujitsu Ten Ltd) 10 Jul. 1992.

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