Vehicle to roadside communication system for determining equipment problems

• US 5,666,109 A
• Filed: 05/30/1995
• Issued: 09/09/1997
• Est. Priority Date: 07/11/1994
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Fukui, Mitsuhiro, Ishihara, Fuminari
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Wu, Daniel J.
• Application Number:
  US08/452,787
• Time in Patent Office: 833 Days
• Field of Search: 340/905, 340/928, 235/384, 364/436, 455/54.1, 455/67.1, 455/67.7
• US Class Current: 340/905
• CPC Class Codes: G08G 1/096716 where the received information does not generate an automatic action on the vehicle control
• CPC Class Codes: G08G 1/096758 where no selection takes place on the transmitted or the received information
• CPC Class Codes: G08G 1/096775 where the origin of the information is a central station
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element

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).

Claims

1. A vehicle to roadside communication system, for performing vehicle to roadside communication between a plurality of road side equipments arranged on a road and a plurality of on-vehicle equipments carried on a plurality of cars, comprising:

a down link system problem determining section carried on the car for determining the presence/absence of a down link problem in down link communication in the on-vehicle equipment, when the down link communication from the road side equipment to the on-vehicle equipment is performed,

a down link problem reporting section for reporting, to at least one of the road side equipments, the information regarding the down link problem for specifying the road side equipment by which the abnormal down link communication has been performed, in the case that the down link problem has been detected by the down link system problem determining section carried on the car, and

a road side down link problem determining section for determining the down link problem of the specific road side equipment, in the case that the information regarding the down link problem of the specific road side equipment is received plural times in one road side equipment,

whereby the down link problem in the road side equipment is determined.

2. The vehicle to roadside communication system according to claim 1 wherein a plurality of the road side equipments are connected to an observation center via a communication line, whereby the information regarding the other road side equipment judged to be abnormal is reported to the observation center.

3. A vehicle to roadside communication equipment, carried on a vehicle, for performing vehicle to roadside communication with a plurality of road side equipments arranged on a road, comprising:

a down link system problem determining section, carried on the car, for determining the presence/absence of a down link problem in down link communication, when the down link communication from the road side equipment is performed, and

a road side down link problem determining section for determining that the down link is abnormal, when the down link problem is detected in the down link communication from a plurality of the road side equipments by the down link system problem determining section, wherein the down link problem is determined to be an on-vehicle down link problem or a road side equipment down link problem.

4. A vehicle to roadside communication equipment, carried on a vehicle, for performing vehicle roadside communication with a plurality, of road equipment arranged along a road, comprising:

a down link system problem determining section, carried on the car, for determining the presence/absence of a down link problem in down link communication, when the down link communication from the road side equipment is performed; and

a road side down link problem determining section for determining that the down link is abnormal when the down link problem is detected in the down link communication from a plurality of the road side equipments by the down link system problem determining section, wherein the down link problem is judged to be an on-vehicle down link problem, in the case that data cannot be received, and the down link problem is judged to be an on-vehicle down link defect, in the case that an error is present in the data.

5. The vehicle to roadside communication equipment according to claim 4 wherein when the down link problem is detected this problem is displayed on a display.

6. A vehicle to roadside communication system, for performing vehicle to roadside communication between a plurality of road side equipments arranged on a road and a plurality of on-vehicle equipments carried on a plurality of vehicles, comprising:

an up link system problem determining section for determining, in the road side equipment, the presence/absence of an up link problem in up link communication, when the up link communication from the on-vehicle equipment to the road side equipment is performed, and

a road side up link problem determining section for determining the up link of the road side equipment is abnormal, when the up link problem is detected in the up link communication from a plurality of on-vehicle equipments by the up link system problem determining section,

whereby the up link problem in the road side equipment is determined.

7. The vehicle to roadside communication system according to claim 6 wherein a plurality of the road side equipments are connected to an observation center via a communication line, whereby the information regarding the other road side equipment judged to be abnormal is reported to the observation center.

8. A vehicle to roadside communication system, for performing vehicle to roadside communication between a plurality of road side equipments arranged along a road and a plurality of on-vehicle equipments carried on a plurality of cars, comprising

a road side equipments memory section, disposed on the on-vehicle equipment, for memorizing passage data designating the road side equipments from which signals were received,

a passage data communication section, disposed on the on-vehicle equipment, for performing the up link communication of the passage data to the road side equipment, and

a road side down link problem determining section, disposed on the road side equipment, for determining a down link problem of the other road side equipment by checking the received passage data with the information regarding the disposition state of the other road side equipment which the road side equipment has,

whereby the down link problem in the road side equipment is determined.

9. The vehicle to roadside communication system according to claim 8 wherein a plurality of the road side equipments are connected to an observation center via a communication line, whereby the information regarding the other road side equipment judged to be abnormal is reported to the observation center.

10. A vehicle to roadside communication system, for performing vehicle to roadside communication between a plurality of road side equipments arranged along a road and a plurality of on-vehicle equipments carried on a plurality of cars, comprising:

a specific information down link section, disposed on each of the plurality of road side equipments, for performing the down link transmission of specific information to the plurality of on-vehicle equipments, and

an on-vehicle up link problem determining section, disposed on each of the on-vehicle equipments, for determining that an up link system is abnormal, when the specific information is not obtained from a plurality of roadside equipments though the up link information is supplied,

whereby the up link problem in the plurality of on-vehicle equipments is determined.

11. A vehicle to roadside communication equipment, carried on a car, for performing vehicle to roadside communication with a plurality of road side equipments arranged along a road, comprising:

an on-vehicle up link communication section for supplying up link information to the plurality of road side equipments requesting the supply of specific information, and

an on-vehicle up link problem determining section for determining that an up link system is abnormal, when the specific information is not obtained from the plurality of road side equipments though the up link information is supplied,

whereby file up link problem in the on-vehicle equipment is determined.

12. A vehicle to roadside communication equipment, carried on a car, for performing vehicle to roadside communication with road side equipments arranged along a road, comprising:

an on-vehicle up link communication section for supplying up link information requesting the supply of specific information from the road side equipment, and

an on-vehicle up link problem determining section for determining that an up link system is abnormal, when the specific information is not obtained from a plurality of roadside equipments though the up link information is supplied,

whereby the up link problem in the on-vehicle equipment is determined and wherein when the up link problem is detected, this problem is displayed on a display.