KR20150146303A - Apparatus and method for traffic information - Google Patents

Abstract

The present invention relates to a device and method for providing traffic information. While a visible state is not ensured, a vehicle terminal device obtains information on a surrounding traffic environment through communications with a road device. When it is determined that there is a traffic jam in a driving road, traffic jam time is calculated by using the number of vehicles driving on a current road and the number of vehicles passing during a traffic signal of a period of a signal. When it is determined there is not a traffic jam, traffic jam time is calculated by using a position of a current vehicle, a distance to a next traffic lights, and a limit speed of a driving road, so a possibility of passing next traffic lights of a driving road and passable time are accurately determined. Accordingly, a vehicle safety accident is prevented in advance and vehicle driving is effectively provided.

Description

[0001] APPARATUS AND METHOD FOR TRAFFIC INFORMATION [0002]

The present invention relates to an apparatus for providing traffic information to a driver, and more particularly to an apparatus for providing traffic information to a driver by communicating with a road-side unit (RSU) The present invention relates to a traffic information providing apparatus and method for preventing a traffic accident from occurring and enabling a vehicle to be operated efficiently.

Background of the Invention [0002] A vehicular ad-hoc network (VANET) is an ad-hoc network constituted by vehicles capable of using wireless communication technology. In a VANET, each vehicle can communicate within the communication range of each other, or communicate with the roadside equipment installed on the road, without the aid of infrastructure such as a base station around the road. VANET can be used for various purposes. It is mainly used for smooth driving by conveying vehicle information of other vehicles while driving, and it can collect information on road condition and traffic volume in real time through various sensors mounted on vehicles and roads. Thereby providing a service for the safety of passengers.

Services provided using VANET include vehicle emergency alert, lane change assistance, intersection driving information, road condition warning, and chain collision warning. Through the service provided as described above, the driver can not only extend the field of view related to the safety of the driver but also receive various traffic information, thereby greatly improving the traffic flow as well as safety and efficiency of the vehicle.

Especially, a system that helps the smooth operation of the vehicle in an environment in which the visibility of the driver is not guaranteed due to heavy snow, heavy rain, a large vehicle ahead, a building, or a terrain, is one of technologies that are very important in terms of securing safety of a vehicle. However, the conventional traffic information providing system provides the driver with only the traffic information that is measured or received without considering the driving condition of the vehicle and the surrounding traffic environment, which is a problem in that the efficiency is low.

Korean Registered Patent No. 10-1371813 (Mar. 03, 2014)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a traffic signal passing allowable time which is outside a visible range of a driver in consideration of a surrounding traffic situation such as a speed of a vehicle, a position of a vehicle, The present invention relates to a traffic information providing apparatus and method for providing a safe and efficient running of a vehicle by warning a driver of the calculation of a traffic information and a wrong vehicle operation.

A traffic information providing apparatus according to a preferred embodiment of the present invention includes a transceiver for receiving a broadcasted beacon message, a controller for determining whether or not the specific road is congested using the received beacon message, The traffic information is generated using the calculated congestion time, the traffic information is determined based on the current vehicle position and the vehicle speed to determine whether the driver is driving the vehicle correctly, And an output unit for outputting a notification message generated by the driving determination unit.

The beacon message includes a position of a next traffic light on the road in which the vehicle is running, a current signal of the traffic light, a time remaining until the signal change, a number of vehicles running on the road, and an average traveling speed of the vehicle .

The congestion determining unit may calculate the congestion time using the number of vehicles that are running on the road and the number of vehicles that pass through the road for one period of a traffic signal when there is congestion on the road currently being driven.

The congestion determining unit may calculate the congestion time using the current position of the vehicle, the distance from the vehicle to the next traffic light, and the speed limit of the road during driving, if there is no congestion on the road currently being driven.

The traveling determining unit includes a GPS measuring unit for measuring the current position of the vehicle and a speed measuring unit for measuring the speed of the vehicle during the current driving.

The traffic information includes a current traffic signal of the next traffic light on the road in which the vehicle is running, a remaining distance to the next traffic light, a remaining time until the signal of the current traffic signal is changed, a predicted congestion time remaining until the next traffic signal passes, And a running speed for the vehicle.

When the driver judges that the driver is driving correctly, the driving judging unit generates a notification message including the traffic information. If the driver judges that the driver is driving the vehicle incorrectly, the driving judging unit generates a notification message including the traffic information and the warning signal .

A method of providing traffic information according to a preferred embodiment of the present invention includes receiving a beacon message through a transceiver of a vehicle terminal device, determining whether the congestion determining unit determines whether a specific road is congested using information included in the beacon message, Wherein the congestion determining unit calculates the congestion time in a different manner according to the determination result, the driving determining unit generates the traffic information using the calculated congestion time, And generating a notification message by using the speed of the vehicle, determining whether the driver is driving the vehicle correctly, and outputting the notification message to the driver.

The congestion determining unit may calculate the congestion time using the number of vehicles passing through the traffic signal for one period and the number of vehicles running on the road when there is congestion on the road currently being operated.

The congestion determining unit may calculate the congestion time using the current position of the vehicle, the distance from the vehicle to the next traffic light, and the speed limit of the road during driving, if there is no congestion on the road currently being driven.

According to the apparatus and method for providing traffic information according to the present invention configured as described above, traffic information of a road currently in operation and whether the road is stagnant is received through a beacon message transmitted from a road surface apparatus in a VANET environment, It is possible to anticipate the time when the traffic signal can pass outside the driver's visible range even in an environment where the visibility of the vehicle is not ensured and warn the driver of the wrong vehicle so as to secure the safety of the vehicle, .

1 is a configuration diagram of a traffic information providing apparatus according to a preferred embodiment of the present invention;
2 is a flowchart of a traffic information providing method according to a preferred embodiment of the present invention.
FIG. 3 is a graph showing the relationship between traffic volume-velocity-density according to a preferred embodiment of the present invention and FIG.
4 is a graph showing a relationship between traffic volume and density according to a preferred embodiment of the present invention.

The present invention may have various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a traffic information providing apparatus according to a preferred embodiment of the present invention.

A traffic information providing apparatus according to a preferred embodiment of the present invention comprises a road surface apparatus (1) and a vehicle terminal apparatus (2).

First, the road surface apparatus 1 is provided with a receiving section 101. The reception unit 101 receives a traffic signal control signal transmitted from the traffic control center or the next traffic signal and a response message transmitted from the vehicle terminal 2.

The traffic signal control signal includes information such as the position of the next traffic signal on the road on which the vehicle is traveling, the signal of the traffic signal presently present, and the time remaining until signal change.

The response message may include position information of the current vehicle measured by the GPS measuring unit 204 and velocity information of the current vehicle measured by the velocity measuring unit 205.

The traffic signal control signal and the response message obtained from the receiving unit 101 are transmitted to the traffic information obtaining unit 102. The traffic information detection unit 102 counts the number of response messages transmitted, grasps the number of vehicles currently running on the road, and transmits the traffic signal control signal and the response message to the beacon Message (Beacon Message). The beacon message includes the position of the next traffic light, the current signal of the next traffic light, the time remaining until the signal change, the number of vehicles running on the current road, and the average traveling speed of the vehicle running on the current road. The beacon message generated from the traffic information obtaining unit 102 is broadcast to all the vehicles within the transmission range through the transmitting unit 103 during a control channel interval (CCH interval).

The broadcasted beacon message is received by the transceiver 201 of the vehicle terminal 2 of each vehicle and transmitted to the congestion determiner 202. [

The congestion determining unit 202 calculates the congestion time using the information included in the beacon message.

A method for determining whether or not the congestion determining unit 202 is stagnant on the road currently in operation is as follows.

Generally, the traffic volume, density, and speed satisfy the following equation (1).

는 교통량,

는 주행중인 차량의 평균속도,

는 교통밀도를 나타낸다.
here,

However,

The average speed of the vehicle under running,

Represents the traffic density.

The congestion determining unit 202 determines whether the road is congested using Equation 1 and Equation 2 below.

는 최대밀도,

는 교통량이 최대 시 교통밀도,

는 특정 구간의 거리,

은 최소 차두거리,

는 현재구간을 최대속도로 달릴 때 요구되는 제동거리,

는 차량의 길이,

은 현재 구간의 차선의 수를 의미한다.here,

The maximum density,

When the traffic volume is maximum, traffic density,

The distance of a specific section,

Is the minimum distance,

Is the braking distance required when the current section runs at full speed,

The length of the vehicle,

Means the number of lanes in the current section.

를 기준으로

값이

보다 큰 경우, 상기 도로에 정체가 있다고 판단하고, 반면

값이

보다 작은 경우 상기 도로에 정체가 없다고 판단한다.Therefore, it can be seen that,

Based on

The value is

, It is determined that there is congestion on the road, while

The value is

It is determined that there is no congestion on the road.

As a result of the determination, if there is congestion on the road currently being driven, the congestion determining unit 202 calculates the congestion time using the following equation (3).

는 정체가 있는 경우의 정체시간,

는 신호등과 자신의 차량 사이의 차량 대수,

는 교통신호 한 주기 동안 통과하는 차량의 대수,

는 교통신호의 주기,

은 운전자가 원하는 신호까지 남은 시간을 나타낸다.
here

The congestion time when there is congestion,

The number of vehicles between the traffic light and the own vehicle,

The number of vehicles passing through one cycle of the traffic signal,

A traffic signal period,

Represents the time remaining until the signal desired by the driver.

On the other hand, if it is determined that there is no congestion in the current road, the congestion determining unit 202 calculates the congestion time using the following equation (4).

는 현재 차량의 위치와 다음 신호등까지의 거리,

는 주행중인 도로의 제한속도,

는 교통신호의 주기,

은 운전자가 원하는 신호까지 남은 시간,

는 운전자가 원하는 신호가 끝나는 시간까지 남은 시간을 나타낸다.
here,

The current vehicle position, the distance to the next traffic light,

The speed limit of the road in operation,

A traffic signal period,

The time remaining until the signal desired by the driver,

Represents the time remaining until the end of the signal desired by the driver.

The congestion determining unit 202 calculates the time taken for the vehicle to pass through the next traffic light using the congestion time calculated as described above, and proposes the traveling speed of the vehicle using the calculated time taken to pass.

At this time, the traveling speed of the vehicle proposed by the congestion determining unit 202 satisfies the following equation (4).

Therefore, when there is congestion on the road currently being driven according to whether or not the road is stagnated, the congestion determining unit 202 determines the congestion time using the number of vehicles that are currently running on the road and the number of vehicles passing through the traffic signal of one period If there is no congestion on the road, the congestion time is calculated using the current vehicle position, the distance to the next traffic light, and the speed limit of the road during driving.

The congestion determining unit 202 transmits the congestion time calculated in the above-described manner to the travel determining unit 203.

The travel determiner 203 receives the beacon message transmitted from the transmission / reception unit 201, the current position of the vehicle measured by the GPS measurement unit 204, the congestion time obtained by the congestion determiner 202, The traffic information is generated by using the current traveling speed of the vehicle measured from the current traveling speed of the vehicle. The traffic information includes a traffic signal of the next traffic light on the road in which the vehicle is running, a remaining distance to the next traffic light, a remaining time until the signal of the current traffic signal changes, a predicted congestion time remaining until the next traffic light passes, And the like.

When the traffic information is generated by the driving determination unit 203, if the traffic congestion is detected as a result of the congestion determining unit 202, the generated traffic information is compared with the predicted congestion time remaining until the next traffic light is passed, The traffic information generated includes the traveling speed for passing the next traffic light and the remaining time until the signal of the current traffic signal is changed, .

The traveling determining unit 203 determines whether the driver is driving the vehicle correctly using the current position of the vehicle measured by the GPS measuring unit 204, the current speed of the vehicle measured by the speed measuring unit 205, and the traffic information And generates a notification message according to the determination result. The notification message includes the generated traffic information when the driver performs the correct driving, and includes the generated traffic information when the driver makes a wrong driving (for example, when the driver does not recognize the crosswalk and enters the vehicle, The vehicle is in violation of the traffic signal, etc.), the mobile communication terminal further includes the generated traffic information and warning signal.

The travel determiner 203 generates a response message for receiving the beacon message and transmits the response message to the road surface apparatus 1 through the transceiver 201. [ The response message may include position information of the current vehicle measured by the GPS measuring unit 204 and speed information of the current vehicle measured by the traveling speed measuring unit. The road surface apparatus 1 can count the number of the vehicles that are running on the road by counting the number of the response messages received by the receiving unit 101. [

The output unit 206 outputs information to the driver using the notification message transmitted from the driving determination unit 203. The information provided by the output unit 206 includes the current traffic signal of the next traffic light on the road under running, the remaining distance to the next traffic light, the remaining time until the signal changes, the traveling speed for passing the next traffic light, Remaining time, warning message due to wrong driving or warning sound.

2 is a flowchart of a traffic information providing method according to a preferred embodiment of the present invention.

First, the reception unit 101 receives a traffic signal control signal transmitted from a traffic signal or a traffic control center and a response message transmitted from the transmission / reception unit 201 of the vehicle terminal apparatus (S301).

The traffic information obtaining unit 102 generates a beacon message using the traffic signal control signal and the response message obtained by the receiving unit 101 (S302).

The beacon message includes a position of a next traffic light on the road in which the vehicle is running, a current signal of the traffic light, a time remaining until the signal change, a number of vehicles running on the road, and an average traveling speed of the vehicle do.

The beacon message generated by the traffic information obtaining unit 102 is transmitted to the transmitting unit 103, and the transmitting unit 103 broadcasts a beacon message to all the vehicles within the transmission range during the control channel interval (S303).

The broadcasted beacon message is received through the transceiver 201 of the vehicle terminal 2 installed in each vehicle (S304).

The congestion determining unit 202 determines whether the current road of the vehicle is congested using the information included in the beacon message received from the transceiver 201 at step S305.

As a result of the determination, if there is congestion on the road, the congestion determining unit 202 calculates the congestion time using the number of vehicles currently running on the road and the number of vehicles passing through one cycle of the traffic signal (S306).

On the other hand, if there is no congestion on the road, the congestion determining unit 202 calculates the congestion time using the current vehicle position, the distance to the next traffic light, and the speed limit of the road in operation (S307).

The driving determination unit 203 receives the congestion time calculated by the congestion determining unit 202 and generates traffic information using the congestion time (S308).

The traffic information includes a traffic signal of the next traffic light on the road in which the vehicle is running, a remaining distance to the next traffic light, a remaining time until the signal of the current traffic signal changes, a predicted congestion time remaining until the next traffic light passes, And the like.

The driving determination unit 203 determines whether the driver is driving the vehicle correctly using the current position of the vehicle measured by the GPS measurement unit 204, the velocity of the current vehicle measured by the velocity measurement unit 205, (S309).

If it is determined that the vehicle is running correctly, the controller 206 transmits a notification message including the traffic information and outputs information to the driver through the output unit 206 (S310).

On the other hand, when the vehicle runs erroneously, a notification message including traffic information and a warning signal is transmitted to the output unit 206 so that a warning screen or a warning sound is output to the driver (S311).

FIGS. 3 and 4 are graphs showing the relationship between the traffic volume-speed-density relationship according to the preferred embodiment of the present invention and the traffic volume-density according to the preferred embodiment of the present invention.

Generally, the relationship shown in FIG. 3 is established between the three variables of traffic volume, density, and speed. In the road surface apparatus 1, the number of response messages transmitted from each vehicle terminal apparatus 2 is counted to determine the number of vehicles currently traveling on the road, and the traffic density is calculated using the number of vehicles. Also, the vehicle speeds of the respective vehicles included in the response message are received, and the average running speeds of vehicles running on the current road are calculated using the received speeds. The congestion determining unit 202 of the vehicle terminal apparatus 2 receives the number of the vehicles and the average traveling speed of the vehicles through the beacon message and calculates the current traveling speed of the vehicle using the relationship shown in FIG. It is possible to judge whether or not the road is stagnant.

The embodiments of the present invention described in the present specification and the configurations shown in the drawings relate to the most preferred embodiments of the present invention and are not intended to encompass all of the technical ideas of the present invention so that various equivalents It should be understood that water and variations may be present. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments, and that various modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. , Such changes shall be within the scope of the claims set forth in the claims.

1: Road surface apparatus
2: Vehicle terminal device
101: Receiver
102:
103:
201: Transmitting /
202:
203:
204: GPS measurement unit
205: speed measuring unit
206:

Claims (10)

A transmitting and receiving unit for receiving a broadcast beacon message;
A congestion determining unit for determining whether a specific road is congested using the received beacon message and calculating a congestion time according to a determination result;
The traffic information is generated using the calculated congestion time, and it is determined whether the driver is driving the vehicle using the traffic information, the current vehicle position and the speed of the vehicle. part; And
And an output unit for outputting a notification message generated by the driving determination unit.
The method according to claim 1,
The beacon message includes a position of a next traffic light on the road in which the vehicle is running, a current signal of the traffic light, a time remaining until the signal change, a number of vehicles running on the road, and an average traveling speed of the vehicle The traffic information providing apparatus comprising:
The method according to claim 1,
Wherein the congestion determining unit calculates the congestion time using the number of vehicles that are running on the road and the number of vehicles that pass through the road for one cycle of the traffic signal when there is congestion on the road currently being driven.
The method according to claim 1,
Wherein the congestion determining unit calculates the congestion time using the current position of the vehicle, the distance from the vehicle to the next traffic light, and the speed limit of the road during driving, .
The method according to claim 1,
Wherein the travel determining unit includes a GPS measuring unit for measuring a position of a current vehicle and a speed measuring unit for measuring a speed of the vehicle during a current driving time.
The method according to claim 1,
The traffic information includes a current traffic signal of the next traffic light on the road in which the vehicle is running, a remaining distance to the next traffic light, a remaining time until the signal of the current traffic signal is changed, a predicted congestion time remaining until the next traffic signal passes, And a driving speed for driving the vehicle.
The method according to claim 1,
When the driver judges that the driver is driving correctly, the driving judging unit generates a notification message including the traffic information. If the driver judges that the driver is driving the vehicle incorrectly, the driving judging unit generates a notification message including the traffic information and the warning signal And generating the traffic information.
Receiving a beacon message through a transmission / reception unit of a vehicle terminal;
Determining whether a specific road is congested using information included in the beacon message;
Calculating a congestion time in different ways according to a result of the determination;
The driving decision unit generating traffic information using the calculated congestion time;
Determining whether the driver is driving the vehicle correctly using the traffic information, the current vehicle position, and the vehicle speed, and generating a notification message; And
And the output unit outputs the notification message to the driver.
9. The method of claim 8,
Wherein the congestion determining unit calculates the congestion time using the number of vehicles passing through the traffic signal of one period and the number of vehicles running on the road when there is congestion on the road currently being operated .
9. The method of claim 8,
Wherein the congestion determining unit calculates the congestion time using the current position of the vehicle, the distance from the vehicle to the next traffic light, and the speed limit of the road in operation when there is no congestion on the road currently being driven .

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