Location based vehicle traffic signal alert system

• US 20070222638A1
• Filed: 03/17/2006
• Published: 09/27/2007
• Est. Priority Date: 03/17/2006
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Alcatel-Lucent USA, Inc. (Nokia Corporation)
• Inventors: Chen, Yang, Wang, Shengqiang, Sharma, Ranjan
• Granted Patent: US 7,466,227 B2
• Time in Patent Office: Days
• US Class Current: 340/901
• CPC Class Codes: G08G 1/095 Traffic lights
• CPC Class Codes: G08G 1/096 provided with indicators in which a mark progresses showing the time elapsed, e.g. of green phase

Abstract

Embodiments of the location based vehicle traffic signal alert system, according to the present method and apparatus, may alert drivers as to when vehicles are approaching the traffic signal lights while the signal is yellow or red. In addition, it may also warn drivers when the signal ahead is about to change colors, for example, from green to yellow or from yellow to red. In an alternative embodiment the signal alert system may also send a signal to the engine/brake system of the automobile to perform automatic throttle control or braking when the driver fails to attempt a required stop at the traffic light.

Claims

1. An apparatus, comprising:

a wireless signal message generator co-located with and operatively coupled to at least one traffic signal light;

an on-board vehicle signal alert system having a wireless signal message receiver, a GPS receiver that receives GPS (global positioning system) signals, and an alert service module operatively coupled to the wireless signal message receiver and to the GPS receiver;

a signal message generator outputting to the wireless signal message receiver at least one traffic signal message indicative of a location of the traffic signal and a current light status of the at least one traffic signal; and

an onboard alarm that is activated by the alert service module as a function of a received at least one traffic signal message and at least one received GPS signal.

2. The apparatus according to claim 1, wherein the traffic signal message comprises four messages containing a latitude and longitude of a position of the traffic light and current directions of yellow or red lights of the at least one traffic signal.

3. The apparatus according to claim 1, wherein the wireless signal message generator has a predetermined broadcast range

4. The apparatus according to claim 3, wherein the predetermined broadcast range is predetermined as a function of the location of the traffic signal light and from velocities of vehicles relative to the at least one traffic signal light.

5. The apparatus according to claim 1, wherein the alert service calculates a vehicle speed and vehicle moving direction, and wherein, when a direction in the traffic signal message matches the vehicle moving direction and when the vehicle speed is greater than zero, the signal alert system activates the onboard alarm.

6. The apparatus according to claim 1, wherein the alarm is at least one of an audible alarm and a visual alarm.

7. The apparatus according to claim 1, wherein the apparatus further comprises a shut down module operatively coupled to the alert service module that is operatively coupled to a vehicle, and wherein the signal alert system activates the shut down module send a signal to an engine/brake system of the vehicle to perform at least one of automatic throttle control and braking, when a driver of the vehicle fails to attempt a required stop at the traffic light in response to the alarm.

8. A method, comprising:

sending, by a traffic signal message generator, a traffic signal message associated with at least one traffic signal light;

receiving, by an on-board traffic signal receiver in a vehicle, the traffic signal message, when the vehicle is approaching the at least one traffic light, regardless of a moving direction of the vehicle;

determining, via GPS (global positioning system), a location of the vehicle;

calculating, by a signal alert service module in the vehicle, a speed and moving direction of the vehicle; and

generating, when a direction in the traffic signal message matches the vehicle moving direction and when the vehicle speed is not zero, an alarm.

9. The method according to claim 8, wherein traffic signal message contains the latitude and longitude of the traffic light and the direction of yellow or red lights of the at least one traffic signal light.

10. The method according to claim 8, wherein, when the vehicle speed is greater than a first predetermined value, and wherein a distance between the vehicle and the at least one traffic signal light is less than a second predetermined value, and wherein the alert system generates a signal that is sent to a engine/brake system of the vehicle to trigger at least one of a throttle control and a brake of the vehicle.

11. The method according to claim 10, wherein the first predetermined value is approximately 20 miles per hour, and wherein the second predetermined value is approximately 10 feet.

12. The method according to claim 8, wherein the method further comprises stopping the alarm when the vehicle comes to a full stop.

13. The method according to claim 8, wherein the traffic signal message comprises four messages containing a latitude and longitude of a position of the traffic light and current directions of yellow or red lights of the at least one traffic signal.

14. The method according to claim 8, wherein the wireless signal message generator has a predetermined broadcast range.

15. The method according to claim 14, wherein the predetermined broadcast range is predetermined as a function of the location of the traffic signal light and from velocities of vehicles relative to the at least one traffic signal light.

16. The method according to claim 8, wherein the method further comprises calculating a vehicle speed and vehicle moving direction, and wherein, when a direction in the traffic signal message matches the vehicle moving direction and when the vehicle speed is greater than zero, the signal alert system activates the onboard alarm.

17. The method according to claim 16, wherein the alarm is at least one of an audible alarm and a visual alarm.

18. The method according to claim 8, wherein the method further comprises sending a signal to an engine/brake system of the vehicle to perform at least one of automatic throttle control and braking, when a driver of the vehicle fails to attempt a required stop at the traffic light in response to the alarm.

19. A method, comprising:

broadcasting a traffic signal message associated with at least one traffic signal light;

receiving the traffic signal message by a vehicle, when the vehicle is approaching the at least one traffic light, regardless of a moving direction of the vehicle;

determining speed and moving direction of the vehicle; and

generating an alarm, as a function of information in the traffic signal message and the speed and direction of the vehicle, when the vehicle is approaching the at least one traffic signal light.

20. The method according to claim 19, wherein the method further comprises determining a location of the vehicle via GPS (global positioning system), and calculating the speed and moving direction of the vehicle.

21. The method according to claim 19, wherein, when the vehicle speed is greater than a first predetermined value, and wherein a distance between the vehicle and the at least one traffic signal light is less than a second predetermined value, and wherein the alert system generates a signal that is sent to a engine/brake system of the vehicle to trigger at least one of a throttle control and a brake of the vehicle.

22. The method according to claim 21, wherein the first predetermined value is approximately 20 miles per hour, and wherein the second predetermined value is approximately 10 feet.

23. The method according to claim 19, wherein the method further comprises calculating a vehicle speed and vehicle moving direction, and wherein, when a direction in the traffic signal message matches the vehicle moving direction and when the vehicle speed is greater than zero, the signal alert system activates the onboard alarm.

24. The method according to claim 23, wherein the alarm is at least one of an audible alarm and a visual alarm.