Vehicle to roadside communication system for determining equipment problems
US5666109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1995 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | May 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096783
- WIPO fieldControl
- WIPO sectorInstruments
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.