Roadside-to-vehicle communication system and driving support system

• US 8,618,953 B2
• Filed: 05/12/2011
• Issued: 12/31/2013
• Est. Priority Date: 05/12/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Morimoto, Kazuhiro
• Primary Examiner(s): BLOUNT, ERIC
• Application Number:
  US13/574,725
• Publication Number:
  US 20130135117A1
• Time in Patent Office: 964 Days
• Field of Search: 340/905, 340/903, 340/901, 340/995.13, 340/991, 370/328, 370/389
• US Class Current: 340/905
• CPC Class Codes: G08G 1/092 Coding or decoding of the information
• CPC Class Codes: G08G 1/093 Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
• CPC Class Codes: G08G 1/096716 where the received information does not generate an automatic action on the vehicle control
• CPC Class Codes: G08G 1/09675 where a selection from the received information takes place in the vehicle
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element

Abstract

Disclosed is a roadside-to-vehicle communication system which allows a vehicle, which is traveling within a roadside-to-vehicle communication area, to receive signal information from a roadside device multiple times. The roadside-to-vehicle communication system includes determination means for determining whether or not new information is added to the signal information transmitted from the roadside device, and update means for, only when the determination means determines that the new information is added to the signal information, updating the signal information which is used on the vehicle side. With this configuration, it is possible to reduce the processing load on the signal information even when the signal information is received multiple times through roadside-to-vehicle communication.

Claims

1. A roadside-to-vehicle communication system which allows a vehicle, which is traveling within a roadside-to-vehicle communication area, to receive signal information from a roadside device multiple times, the roadside-to-vehicle communication system comprising:

determination means for determining whether or not new information is added to the signal information transmitted from the roadside device; and

update means for, only when the determination means determines that the new information is added to the signal information, updating the signal information which is used on the vehicle side

wherein the determination means determines whether or not the new information is added by comparing the number of light color changes included in the signal information transmitted at different times.

2. The roadside-to-vehicle communication system according to claim 1, wherein the new information is a new signal cycle.

3. The roadside-to-vehicle communication system according to claim 1,

wherein the new information is the duration of each light color of a signal.

4. The roadside-to-vehicle communication system according to claim 1,

wherein the determination means determines whether or not the new information is added by comparing the number of light colors in which a minimum remaining time and a maximum remaining time of a display remaining time of each light color in the signal information transmitted at different times match each other.

5. A driving support system which, in a roadside-to-vehicle communication system which allows a vehicle traveling within a roadside-to-vehicle communication area to receive signal information from a roadside device multiple times, performs driving support on the basis of the signal information received by the vehicle from the roadside device,

wherein the driving support is performed on the basis of the signal information which is used on the vehicle side and updated by the update means of the roadside-to-vehicle communication system according to claim 1.