METHOD FOR RUNNING VEHICLES DETECTING NETWORK AND SYSTEM THEREOF

• US 20100156669A1
• Filed: 10/23/2009
• Published: 06/24/2010
• Est. Priority Date: 12/23/2008
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Sung, Kyung Bok, Kim, Do Hyun, Choi, Jeong Dan, Kim, Kyeong Tae, Jang, Byung Tae, Lim, Jae Han, Yoo, Jaejun, KIM, Jungsook
• Granted Patent: US 8,362,924 B2
• Time in Patent Office: Days
• US Class Current: 340/917
• CPC Class Codes: G08G 1/01 Detecting movement of traffic to be counted or controlled G08G1/07 - G08G1/14 take precedence
• CPC Class Codes: G08G 1/08 according to detected number or speed of vehicles

Abstract

Provided are a method for running a network for vehicle detection and a system thereof. Each vehicle detecting device is classified into a plurality of groups based on information provided from the vehicle detecting devices and control information that activates or deactivates components of the corresponding vehicle detecting devices is set for each group based on the information. Power of a signal transmitting the information is set for each vehicle detecting device.

Claims

1. In a system forming a sensor network between vehicle detecting devices that are installed on a road to detect vehicles, a method for running a network linked with a traffic signal controller installed on a road to control the vehicle detecting devices, comprising:

classifying the vehicle detecting devices forming the sensor network into a plurality of groups by the system;

determining a current signal state based on traffic signal information provided from the traffic signal controller by the system;

generating first activation control information that allows the vehicle detecting device to activate or deactivate a sensing operation of detecting vehicles for each group by the system, based on the current signal state of the determined traffic signal controller and vehicle incoming and outgoing information provided from the vehicle detecting devices of each group; and

transmitting the first activation control information including an instruction code indicating the activation or deactivation and an activated or no-activated starting time and duration for each group by the system.

2. The method for running a network of claim 1, wherein the classifying classifies the vehicle detecting devices into predetermined groups based on characteristics of a road on which each vehicle detecting device is installed, a position on which each vehicle detecting device is installed, vehicle incoming and outgoing information to and from the road on which each vehicle detecting device is installed, and traffic.

3. The method for running a network of claim 2, wherein the classifying classifies the vehicle detecting devices installed on a road for each lane in consideration of a vehicle traveling direction of each road, and classifies the corresponding vehicle detecting devices into a plurality of groups for each lane in the same traveling direction.

4. The method for running a network of claim 2, further comprising grouping the vehicle detecting devices installed on a road for each time using different methods, and transmitting information according the grouping to each vehicle detecting device whenever the grouping is performed.

5. The method for running a network of claim 2, wherein the number of groups is inversely proportional to traffic.

6. The method for running a network of claim 2, wherein, when the vehicle detecting devices are installed in a vehicle detecting section of a ramp of an intersection and traffic is heavier than a set value, the classifying includes:

grouping the vehicle detecting devices located at a detecting section corresponding to a stop line nearest to the intersection and the vehicle detecting devices located at a detecting section farthest from the intersection among the vehicle detecting sections into a first group and a second group, respectively; and

grouping the remaining vehicle detecting devices except for the vehicle detecting devices included in the first and second groups among the vehicle detecting devices in the vehicle detecting section into a plurality of groups by binding the remaining vehicle detecting devices by a set number in order to group them.

7. The method for running a network of claim 2, wherein, when the vehicle detecting devices are installed in the vehicle detecting section of the ramp of the intersection and traffic is lighter than a set value, the classifying includes:

grouping the vehicle detecting devices located at a detecting section corresponding to a stop line nearest to the intersection and the vehicle detecting devices located at a detecting section farthest from the intersection among the vehicle detecting sections into a first group and a second group, respectively, by binding them by a set number in order to group them; and

forming the remaining vehicle detecting devices except for the vehicle detecting devices included in the first and second groups among the vehicle detecting devices in the vehicle detecting section into one group by binding all the remaining vehicle detecting devices.

8. The method for running a network of claim 2, wherein, when the vehicle detecting devices are installed in the vehicle detecting section on a single direction road, the vehicle detecting devices are classified in a plurality of groups according to a lane direction by binding them into a predetermined number in order to group them.

9. The method for running a network of claim 1, wherein the generating the first activation control information generates the first activation control information that deactivates the sensing operation of the vehicle detecting devices of the corresponding group until a stop signal is changed to a straight signal or a turn signal that indicates traveling, if it is determined that the signal state of the traffic signal controller is a stop signal and the vehicles stop based on the vehicle incoming and outgoing information of the corresponding group.

10. The method for running a network of claim 1, wherein the generating the first activation control information generates the first activation control information that activates the sensing operation until the signal state is changed from a stop signal to any other signals, when the signal state of the traffic signal controller is a stop signal and the road on which the vehicle detecting devices of the corresponding group are installed is a lane that allows for turn regardless of the traffic indicating signal.

11. The method for running a network of claim 1, wherein, if it is determined that the signal state of the traffic signal controller is a travelling signal and there are no vehicles in the vehicle detecting section of the intersection in which the vehicle detecting devices are installed, the generating the first activation control information includes

generating the first activation control information in order to activate the sensing operation of the vehicle detecting devices of the group installed in the detecting section farthest from the intersection among the vehicle detecting sections, and

generating the first activation control information in order to deactivate the sensing operation of the remaining vehicle detecting devices except for the vehicle detecting devices included in the group installed in the farthest detecting section among the vehicle detecting devices installed in the vehicle detecting section.

12. The method for running a network of claim 11, further comprising, when at least one vehicle detecting device of the group installed in the farthest detecting section detects the incoming of vehicles, generating the first activation control information in order to activate the sensing operation of the remaining vehicle detecting devices.

13. The method for running a network of claim 1, further comprising:

calculating traffic based on the incoming and outgoing information of vehicles provided from the vehicle detecting devices of each group;

setting at least one of a beacon tracking period that receives a beacon signal provided from the system and transmission power that transmits the detecting signal including the incoming and outgoing information of vehicles by the vehicle detecting device of the corresponding group, based on the calculated traffic; and

transmitting at least one of the second activation control information including the predetermined beacon tracking period or the transmission power information including the transmission power to the vehicle detecting devices of the corresponding group.

14. The method for running a network of claim 13, wherein the setting at least one of the beacon tracking period and the transmission power includes at least one of:

when the calculated traffic of the group is smaller than the set first traffic, setting the beacon tracking period of the corresponding group to N1×

BI (where N1 is an integer as a set value and BI is the beacon signal transmission period set in the system);

when the calculated traffic of the group is even smaller than the set first traffic, setting the transmission power of the corresponding group to the maximum transmission output×

T1/N (where T1 is an integer as a set value and N is a division number of traffic);

when the calculated traffic of the group is larger than the set first traffic and smaller than the second traffic, setting the beacon tracking period of the corresponding group to N2×

BI (where N2 is an integer as a set value and BI is a beacon signal transmission period set in the system, N1>

N2); and

when the calculated traffic of the group is larger than the set first traffic and smaller than the second traffic, setting the transmission power of the corresponding group to the maximum transmission output×

T2/N (where T2 is an integer as a set value T1<

T2).

15. The method for running a network of claim 13, wherein the second activation control information further includes the instruction code that allows the vehicle detecting device to transmit the detecting signal including the vehicle detecting information and to activate or deactivate the operation of receiving the information from the system, the activated or deactivated starting time, and the duration.

16. A network operating system linked with a traffic signal controller installed on a road to control vehicle detecting devices when a sensor network is formed between vehicle detecting devices that are installed on the road to detect vehicles, comprising:

a grouping unit that classifies each vehicle detecting device in a plurality of groups;

a controller that generates activation control information and transmission output setting information on the vehicle detecting devices for each group, based on one of a current signal state of the traffic signal controller and vehicle incoming and outgoing information provided from the vehicle detecting devices of each group, and traffic information; and

a communicating unit that transmits the activation control information and the transmission output setting information to the vehicle detecting devices of each group and receives the vehicle incoming and outgoing information provided from each vehicle detecting device to transmit it to the controller,

wherein the activation control information includes at least one of first activation control information that allows the vehicle detecting device of the corresponding group to activate or deactivate the sensing operation of detecting vehicles and second activation control information that allows the vehicle detecting devices to indicate a beacon tracking period for receiving a beacon signal provided from the system, and the transmission output setting information includes a transmission power value that allows the vehicle detecting devices to transmit the detecting signal including the vehicle incoming and outgoing information.

17. The network operating system of claim 16, wherein the second activation control information further includes information that activates or deactivates an operation of transmitting the detecting signal including the vehicle detecting information of the vehicle detecting device and receiving the information from the system, and the first and second activation information includes an instruction code indicating activation or deactivation for each group and an activation or deactivation starting time and duration.

18. The network operating system of claim 16, wherein the controller, when the calculated traffic of the group is smaller than the set first traffic based on the incoming and outgoing information of vehicles, sets the beacon tracking period of the corresponding group to N1×

BI (where N1 is an integer as a set value and BI is the beacon signal transmission period set in the system), and when the calculated traffic of the group is larger than the set first traffic and smaller than the second traffic, sets the beacon tracking period of the corresponding group to N2×

BI (where N2 is an integer as a set value and BI is a beacon signal transmission period set in the system, N1>

N2).

19. The network operating system of claim 16, wherein the controller, when the calculated traffic of the group is smaller than the set first traffic based on the incoming and outgoing information of vehicles, sets the transmission power of the corresponding group to the maximum transmission output×

T1/N (where T1 is an integer as a set value and N is a division number of traffic), and when the calculated traffic of the group is larger than the set first traffic and smaller than the second traffic, sets the transmission power of the corresponding group to the maximum transmission output×

T2/N (where T2 is an integer as a set value, T1<

T2).