KR101615970B1 - System for providing traffic information of road work zone using dedicated road traffic communication-based roadside unit (rsu) and onboard unit (obu), and method for the same - Google Patents

System for providing traffic information of road work zone using dedicated road traffic communication-based roadside unit (rsu) and onboard unit (obu), and method for the same Download PDF

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KR101615970B1
KR101615970B1 KR1020140154501A KR20140154501A KR101615970B1 KR 101615970 B1 KR101615970 B1 KR 101615970B1 KR 1020140154501 A KR1020140154501 A KR 1020140154501A KR 20140154501 A KR20140154501 A KR 20140154501A KR 101615970 B1 KR101615970 B1 KR 101615970B1
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communication
vehicle
traffic
information
rsu
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KR1020140154501A
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Korean (ko)
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장진환
최동원
윤여환
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한국건설기술연구원
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions

Abstract

Roadside Unit (RSU) and Onboard Unit (OBU) based on Dedicated Short Range Communications (DSRC) / Wireless Access for Vehicular Environment (WAVE) It is possible to prevent a traffic accident such as a collision accident in a construction section and to minimize the traffic congestion caused by the road construction by collecting the congestion section length and the traffic delay time information of the construction section in real time and delivering it to the rear vehicle, A road traffic communication-based roadside device and a vehicle terminal capable of providing traffic delay time information to a vehicle for passing through a construction section so that a rearward vehicle of the section does not experience an unnecessary delay through a bypass route, A traffic information providing system and a method thereof are provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic information provision system for a road construction section using a road traffic communication-based roadside device and a vehicle terminal, ), AND METHOD FOR THE SAME}

The present invention relates to a road construction section traffic information providing system, and more particularly, to a traffic information provision system for a road construction section based on DSRC (Dedicated Short Range Communications) / WAVE (Wireless Access for Vehicular Environment) (Waiting queue) length and traffic delay time as traffic information of a road work zone using a roadside unit (RSU) and an onboard unit (OBU) The present invention relates to a road traffic communication-based roadside apparatus and a road traffic information providing system using the vehicle terminal and a method thereof.

As road facilities such as constructed bridges and tunnels become obsolete, many road works occur each year. Such road construction is recognized as a social problem because it can reduce traffic capacity and cause traffic congestion, and is closely related to safety accidents and environmental problems. At this time, the rate of fatal accidents in the road construction section is about 2.5 times higher than that in the general section, and the amount of carbon dioxide (CO 2 ) generated in the case of traffic congestion increases by 2 to 3 times.

For example, according to the result of non-iterative congestion cost calculated in 2008 national highway provided by Korea Transport Research Institute, total non repetitive congestion cost was estimated to be 520.1 billion won, And 15% of the congestion cost, 77.9 billion won. In addition, the percentage of congestion caused by road congestion is about 2%.

On the other hand, in the case of Seoul, it is estimated that about 1,300 road construction works are carried out by using a part of roads such as road repair / expansion construction, road / traffic facility construction, and subway construction. It reaches about 200 billion won every year. It is expected that the number of incidents will increase even further if it includes both urban and rural roads.

In the United States, about 30 trillion won is spent on road maintenance budgets every year, and it is reported that up to 25% of all roads are affected by road construction. In addition, according to the US Department of Transportation, it is known that the total vehicle delay due to road construction is 480 million hours per year, and traffic accidents caused by road blockage are likely to occur.

Meanwhile, FIG. 1 is a view illustrating the installation of a safety section for a construction section according to a conventional technique.

As shown in FIG. 1, in order to reduce traffic accidents and smooth passage of roads, a traffic cone, a drum, and the like are installed as a safe zone for a construction section on a road to induce a smooth vehicle flow. Alternatively, movable construction signs are used to provide static construction section information.

However, safety facilities according to the prior art do not provide information suitable for dynamically changing traffic conditions such as traffic volume, bad weather, and the like. For example, in the case of a vehicle queue according to road construction on a curved road, there is a high possibility that the following vehicle will collide with it. Especially, when the curved road is downhill or the weather condition is poor such as fog, the probability of traffic accident can be further increased. In addition, the sign that only transmits the static information has a problem that it can not accurately provide the variable travel time information of the construction section according to the traffic situation.

On the other hand, as a prior art for solving the above-mentioned problems, Korean Patent No. 10-1147447 discloses an invention entitled " Road Construction Traffic Management System and Method ", which will be described with reference to FIGS. 2 and 3 do.

FIG. 2 is a view for explaining a road construction traffic management system according to the related art, and FIG. 3 is a configuration diagram of the road construction traffic management system shown in FIG.

2 and 3, the road construction traffic management system according to the related art is installed at a predetermined interval on at least one side of the road construction section Z to detect the existence and speed of the vehicle V A plurality of vehicle detecting means to which a sensor (31) is attached; And a message display means provided in front of the road construction section Z for displaying various messages according to road conditions of the road construction section Z to the driver.

A drum 30 which is movably installed in the vehicle detection means can be used. The drum 30 can be used repeatedly because the drum 30 can be moved to the vicinity of another road construction zone Z by using the drum 30 which is movably installed in the vehicle detection means.

3, the road construction traffic management system according to the related art determines a road condition near the road construction zone Z according to the detection result of the sensor 31 installed on the drum 30 And a control unit 32 for transmitting a message signal to the intelligent electric sign board 40. 3 shows that the control unit 32 is located on the drum 30 and is connected to the sensor 31 by wire so as to receive the detection result of the sensor 31. When the control unit 32 is located on the drum 30 The detection result of the sensor 31 may be received wirelessly.

The drum 30 is provided with a transmitter 122 for receiving a signal from the sensor 31 and for sending a message signal generated by the controller 32 to the intelligent electric sign 40 in accordance with the detection result of the sensor 31. The transmitting unit 33 can transmit a message signal to the intelligent electric sign board 40 by using wireless communication.

The road construction traffic management system may include a power supply unit 34 for supplying power to the control unit 32 and the like. The power supply 34 may use external power, or may use internal power such as a battery.

The control unit 32 determines the road condition near the road construction zone Z in accordance with the detection result of the sensor 31. [ When the road condition near the road construction zone Z is determined, a message signal is transmitted to the intelligent electric sign board 40.

According to the road construction traffic management system according to the related art, various information regarding the road construction section can be provided to the driver before the road construction section enters the road construction section that blocks at least one lane, It is possible to maintain a smooth traffic flow and to reduce the cost required to control the traffic because the traffic control source is unnecessary, and it is possible to prevent the traffic control source from being subjected to a traffic accident.

However, in the case of the road construction traffic management system according to the related art, a plurality of vehicle detection means to which the sensor 31 for detecting the presence and speed of the vehicle V is attached must be separately provided, A message display means for displaying various messages according to road conditions of the road Z is required to be separately provided.

Meanwhile, Dedicated Short Range Communication (DSRC) of the 5.8 ㎓ band plays a fundamental role in the implementation of ITS environment such as toll collecting system, bus guidance system, and parking management system. This DSRC basically uses the 5.8GHz band, and the data transmission speed is more than several hundred kbps and the communication method using the infrared light. It collects unmanned automatic toll (ETC), parking and major fare collection, , Road information providing, public transportation and commercial vehicle management, provision of weather information, emergency vehicle processing, vehicle tracking, and so on.

Currently, it is used in ETC and BIS in Korea, and it is utilized in various application service fields. Currently, domestic DSRC standard adopts active type and IR, and there are limits to providing various roadside communication services. To overcome these limitations, Japan developed and commercialized a technology called the T75 standard. In the United States, the 5.9GHz DSRC standard is being developed under government support. Table 1 shows the characteristics of the US, Japan, and Korea in which such DSRC technology is applied or introduced.

Figure 112014107517325-pat00001

If a traffic information system using DSRC technology is constructed, it is possible to exchange information about the speed, position, braking, and driving state of the vehicles in the area directly or indirectly related to the nearby vehicle through the communication between the base station and the vehicle And can provide information to the user for safe operation such as traffic communication, traffic control, unexpected situation, and road condition.

4 is a diagram for explaining the concept of a general DSRC.

As shown in FIG. 4, the traffic information system using general DSRC collects data such as the vehicle speed and the traffic volume from the OBU when passing through a roadside base station installed at an appropriate installation interval for efficient traffic information generation , And can provide information such as traffic communication, traffic control, and an unexpected situation quickly through the vehicle terminal (OBU).

However, in the case of the traffic information system using the DSRC, since a plurality of roadside base stations must be fixedly installed at an appropriate installation interval, it is impossible to accurately measure the traffic information on the road construction section that is generated variably, There is a problem in that it is not possible to provide variable travel delay time information for the construction section.

Korean Patent No. 10-1147447 filed on July 5, 2011, entitled "Road Construction Traffic Management System and Method" Korean Patent Publication No. 2012-136732 (Publication date: December 20, 2012), title of invention: "Traffic information providing system and method" Korean Patent No. 10-834002 filed on Dec. 8, 2006, entitled "Integrated terminal device using DSRC wireless communication method and its operation method" Korean Patent No. 10-818398 filed on May 26, 2001, entitled " System and method for providing road surface condition and traffic situation information " Korean Registered Patent No. 10-514719 filed on Feb. 7, 2005, entitled "Digital signboard for indication of road surface condition of accidents & Korean Patent No. 10-766025 filed on Dec. 17, 2004, entitled "Traffic Information Integration Service System" Korean Patent Publication No. 2009-101625 (Publication date: September 29, 2009) Title of invention: "Traffic information providing system using road markers" U.S. Patent No. 6,756,915 (filed on October 25, 2001), entitled " Geographic Information Service Apparatus & Method Using a DSRC Network & U.S. Patent No. 7,173,544 filed on September 15, 2004, entitled "On-Vehicle DSRC Apparatus" Japanese Unexamined Patent Application Publication No. 2006-291502 (published on October 26, 2006), entitled "Traffic monitoring and alarm device"

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for collecting traffic congestion section length and traffic lag time information of a construction section due to road construction on a DSRC / WAVE- A road-traffic communication-based roadside device and a traffic information providing system using the vehicle terminal, which can prevent traffic accidents such as a collision accident in the construction section by minimizing the traffic congestion caused by the road construction, .

It is another object of the present invention to provide a method and apparatus for providing traffic delay time information to a vehicle for passing through a construction section so that a rear vehicle of a road construction section does not experience an unnecessary delay through a bypass route, A road traffic communication-based roadside device, and a traffic information provision system for a road construction section using a vehicle terminal and a method thereof.

According to an aspect of the present invention, there is provided a road traffic communication-based roadside device and a road construction section traffic information providing system using the vehicle terminal, which are installed in a construction section on a road, And a travel time information calculation unit for calculating travel time and length of a congestion section caused by the construction section according to vehicle location information and travel time information passing through the construction section, DSRC roadside equipment; Wherein the mobile station is mounted on a vehicle passing through a construction section on the road and transmits vehicle location information and travel time information to the mobile DSRC roadside apparatus in the RSU communication area, A first vehicle terminal in at least one RSU communication coverage area for receiving information; And a second vehicle terminal outside the at least one RSU communicable area for performing communication (V2V communication) between the first vehicle terminal and the vehicle outside the RSU communicable area to receive the congestion section length and the traffic delay time information, The road traffic dedicated communication is DSRC (Dedicated Short Range Communications) / WAVE (Wireless Access for Vehicular Environment) communication capable of performing V2I (Vehicle to Infrastructure) communication or I2V (Infrastructure to Vehicle) communication.

Herein, the length of the congestion section represents a length of a vehicle waiting matrix in the construction section, which is a distance to a point where the speed of the vehicle is drastically reduced in the RSU communication coverage area, and the traffic delay time is a length of a vehicle passing through the construction section And indicates a travel time.

Here, the time point of the congestion section length is set to a point where it is variably reduced to 50% or less compared with the speed limit of the corresponding section, and the traffic congestion time is set to the end point of the construction section The travel time of the first vehicle terminal.

Here, when the vehicle exists in the range of 300 m to 1 km, which is an RSU communication enabled area, the mobile DSRC RSE provides the calculated congestion zone length and traffic delay time information through RSU-OBU (V2I) communication, OBU-OBU (I2V-V2V) communication, when the mobile terminal is located outside the communicable area, and transmits the calculated congestion section length and traffic delay time information through the RSU-OBU-OBU (I2V-V2V) communication.

Here, the mobile DSRC roadside apparatus includes a congestion zone length calculator for calculating a vehicle queue length in the construction section according to vehicle location information received from the first vehicle terminal; A traffic delay time calculating unit for calculating a traffic delay time in the construction section according to travel time information received from the first vehicle terminal; And vehicle-to-infrastructure communication (V2I) communication with the first vehicle terminal to receive vehicle position information and traffic time information from the first vehicle terminal, calculate the calculated congestion section length and the traffic lag time To the first vehicle terminal.

Here, each of the first vehicle terminal and the second vehicle terminal may include: a data storage unit for storing the congestion section length and traffic delay time information received from the mobile DSRC roadside apparatus; And transmitting the vehicle location information and travel time information to the mobile DSRC roadside apparatus by performing V2I communication with the mobile DSRC roadside apparatus, receiving the congestion section length and traffic delay time information from the mobile DSRC roadside apparatus, And a DSRC transceiver unit for performing V2V (Vehicle to Vehicle) communication, which is a communication between the terminal and the vehicle, and transmitting the received congestion section length and traffic delay time information to the other vehicle terminals.

According to another aspect of the present invention, there is provided a road traffic communication-based roadside apparatus and a traffic information providing method using the vehicle terminal, the method comprising the steps of: a) Installing a device; b) establishing a congestion zone start point, a congestion zone end point and an RSU communicable zone corresponding to the location of the mobile DSRC roadside apparatus; c) collecting vehicle location information and travel time information through a first vehicle terminal that travels through the construction section and the mobile DSRC roadside apparatus via road traffic communication; d) calculating the congestion section length and the traffic delay time caused by the construction section according to the vehicle location information and the traveling time information, by the mobile DSRC roadside apparatus; e) The mobile DSRC RSE communicates with the first vehicle terminal in the RSU communication enabled area mounted on the construction section entry vehicle by VR communication (V2I communication) and transmits the calculated congestion section length and traffic delay time information step; f) a first vehicle terminal in the RSU communication area performs communication (V2V communication) with the second vehicle terminal outside the RSU communicable area mounted on the construction section rear vehicle, and transmits the transmitted congestion section length and the traffic jam And time information, wherein the road traffic dedicated communication is DSRC / WAVE communication capable of performing V2I communication or I2V communication.

The length of the congestion section represents a length of a vehicle queue in the construction section, which is a distance to a point at which the speed of the vehicle in the RSU communication area is drastically reduced. The passage delay time represents a passage Time.

Here, the time point of the congestion section length is set to a point where it is variably reduced to 50% or less compared with the speed limit of the corresponding section, and the traffic congestion time is set to the end point of the construction section The travel time of the first vehicle terminal.

If the vehicle exists in the range of 300 m to 1 km, which is an RSU communicable area, the mobile DSRC roadside apparatus provides the calculated congestion section length and traffic delay time information through the RSU-OBU (V2I communication) in step e) And transmits the calculated congestion section length and traffic delay time information through the RSU-OBU-OBU (I2V-V2V communication) when the vehicle exists outside the RSU communication coverage area in step f).

If the first vehicle terminal is present at the "RSU-OBU communication start point" in the step c), the first vehicle terminal transmits a communication for collecting the congestion zone length and traffic jam time information with the mobile DSRC roadside apparatus And starts communication with the vehicle terminal that is the farthest distance from the mobile DSRC roadside apparatus, when a plurality of vehicle terminals exist in the "RSU-OBU communication start point ".

In case that the first vehicle terminal abnormally travels the construction section through the construction section or the U-turn during the communication between the RSU and the OBU in the step c), the mobile DSRC roadside- A reset time period for stopping communication with the first vehicle terminal is set periodically if communication is not performed or if the communication terminal is present at the same position for a long time.

Here, in the case of the V2V communication in the step f), the mobile DSRC roadside apparatus sets a time band so that all the vehicles receiving the information can prevent communication overload due to the same information linkage, and the mobile DSRC roadside apparatus And the traffic jam length information and the traffic jam time information received only to the vehicle terminal having the largest time band with the largest separation distance.

Here, the mobile DSRC roadside apparatus may include a virtual communication triangle in consideration of the characteristics of the mobile DSRC roadside apparatus and the corresponding construction section route so that information is not transmitted in the opposite direction when the congestion zone length and the traffic delay time information between the vehicle terminals are transmitted. And transmits information received only to the vehicle terminals existing in the communication triangle.

In step f), the position of the vehicle terminal that has transmitted the congestion section length and the traffic delay time information is checked with respect to the position of the vehicle terminal that has received the congestion section length and the traffic delay time information, And transmits the information backward only when the distance is within a threshold value of the triangle.

Here, the vehicle terminal checks the position of the vehicle terminal that transmitted the corresponding information, the position of the mobile DSRC roadside apparatus, and the position of the mobile terminal when the information of the congestion section length and the travel delay time is received, If the mobile terminal is closer to the mobile DSRC roadside apparatus 100 than the vehicle terminal, the received information can be deleted.

According to the present invention, the length of the congested section and the traffic delay time information of the construction section due to the road construction are collected in real time based on the DSRC / WAVE-based communication which is dedicated for the road traffic and transmitted to the rear vehicle, It is possible to minimize traffic congestion caused by construction work.

According to the present invention, since the traffic delay time information is provided to the vehicle traveling on the construction section, the rearward vehicle does not experience an unnecessary delay through the use of the bypass road and the departure time adjustment, have.

FIG. 1 is a view illustrating an installation of a safety section for a construction section according to a conventional technique.
2 is a view for explaining a road construction traffic management system according to the prior art.
3 is a block diagram of the road construction traffic management system shown in FIG.
4 is a diagram for explaining the concept of a general DSRC.
5 is a view schematically showing a road traffic communication-based roadside device and a road construction section traffic information providing system using a vehicle terminal according to an embodiment of the present invention.
FIG. 6 is a detailed configuration diagram of a mobile DSRC roadside assistance device and a vehicle terminal in a road traffic service-based roadside device and a traffic information service system using a vehicle terminal according to an exemplary embodiment of the present invention.
FIG. 7 is a view for explaining the collection of vehicle location information and travel time information in the road traffic information-based roadside communication device-based roadside device and the road construction section traffic information providing system using the vehicle terminal according to the embodiment of the present invention.
8 is a flowchart illustrating a method of providing traffic information for a road construction section using a road traffic communication-based roadside device and a vehicle terminal according to an embodiment of the present invention.
FIG. 9 is a diagram showing how V2I and V2V communication are linked to provide information in a road traffic communication-based roadside apparatus and a road construction section traffic information providing method using a vehicle terminal according to an embodiment of the present invention.
FIG. 10 is a diagram for explaining a direction setting for providing information in the road traffic communication-based roadside apparatus and the road construction section traffic information providing method using the vehicle terminal according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

[Traffic information system for road construction section]

FIG. 5 is a view schematically showing a road traffic communication-based roadside device and a traffic information providing system using a vehicle terminal according to an embodiment of the present invention. FIG. FIG. 2 is a specific configuration diagram of a mobile DSRC roadside assistance device and a vehicle terminal in a traffic information providing system using a communication-based roadside device and a vehicle terminal.

5 and 6, the road traffic service-based roadside apparatus and the road traffic service information providing system using the vehicle terminal according to the embodiment of the present invention include a mobile DSRC RSU 100, And includes a vehicle terminal (OBU 200) and a second vehicle terminal 300.

The mobile DSRC RSU 100 is installed in the construction section 600 on the road 500 and performs a road traffic dedicated communication by setting the congestion section time point, the congestion section end point, and the RSU communication enabled area, The length of the congestion section and the travel delay time due to the construction section 600 are calculated according to the vehicle location information and the travel time information passing through the construction section 600. Here, the road traffic dedicated communication is DSRC (Dedicated Short Range Communications) / WAVE (Wireless Access for Vehicular Environment) communication capable of performing V2I (Vehicle to Infrastructure) communication or I2V (Infrastructure to Vehicle) communication.

Specifically, the congestion section length indicates the length of a vehicle waiting matrix in the construction section 600, which is a distance from the RSU communication coverage area to a point at which the vehicle speed is drastically reduced. 600). ≪ / RTI > Specifically, the time point of the congestion period (queue length) is set to a point where it is variably reduced to 50% or less of the limit speed of the corresponding interval, and the traffic congestion time is set to a point The travel time of the first vehicle terminal 200 can be set to the end point of the construction section, which is the end point.

The first vehicle terminal 200 is a vehicle terminal in at least one or more RSU communication coverage areas and is mounted on a vehicle passing through the construction section 600 on the road 500, Travel time information to the mobile DSRC RSE 100, and receives the congestion zone length and traffic delay time information from the mobile DSRC RSE 100.

The second vehicle terminal 300 is a vehicle terminal outside the at least one RSU communication area, performs communication (V2V communication) between the first vehicle terminal 200 and the vehicle outside the RSU communication area (V2V communication) Delay time information is received.

Accordingly, when the vehicle exists in an RSU communication area of 300 m to 1 km, the mobile DSRC roadside apparatus 100 provides the calculated congestion section length and traffic delay time information through RSU-OBU (V2I) communication, When the vehicle exists outside the RSU communicable area, the calculated congestion section length and traffic delay time information can be transmitted through the RSU-OBU-OBU (I2V-V2V) communication.

6, the mobile DSRC RSE 100 includes an RSU control unit 110, a congestion zone length calculation unit 120, a traffic delay time calculation unit 130, and a DSRC transmission / reception unit 140, Each of the first vehicle terminal 200 and the second vehicle terminal 300 includes OBU controllers 210 and 310, data storage units 220 and 320, and DSRC transceivers 230 and 330.

The congestion zone length calculating unit 120 of the mobile DSRC roadside apparatus 100 calculates the vehicle queue length in the construction section 600 according to the vehicle position information received from the first vehicle terminal 200.

The travel delay time calculating unit 130 of the mobile DSRC roadside apparatus 100 calculates the travel delay time in the construction section 600 according to the travel time information received from the first vehicle terminal 200.

The DSRC transceiver 140 of the mobile DSRC RS 100 communicates with the first vehicle terminal 200 via vehicle-to-infrastructure communication (V2I) communication from the first vehicle terminal 200 Vehicle position information and travel time information, and transmits the calculated congestion section length and traffic delay time to the first vehicle terminal 200. [

The RSU control unit 110 of the mobile DSRC RSE 100 sets the overall operation of the mobile DSRC RSE 100. For example, the RSU control unit 110 may set a congestion section point, an congestion section end point, and an RSU communication coverage area.

The data storage units 220 and 320 of the first vehicle terminal 200 and the second vehicle terminal 300 may store the congestion section length and traffic delay time information received from the mobile DSRC roadside apparatus 100 .

The DSRC transceivers 230 and 330 of the first vehicle terminal 200 and the second vehicle terminal 300 perform V2I communication with the mobile DSRC roadside apparatus 100 to control the mobile DSRC roadside apparatus 100, And receives the congestion section length and traffic delay time information from the mobile DSRC roadside apparatus 100 and transmits V2V (Vehicle to Vehicle) communication, which is another vehicle terminal-to-vehicle communication, And transmits the received congestion section length and traffic delay time information to another vehicle terminal.

The OBU control units 210 and 310 of the first vehicle terminal 200 and the second vehicle terminal 300 control the overall operation of the first vehicle terminal 200 and the second vehicle terminal 300, respectively.

Referring to FIGS. 5 and 6, a system for providing traffic information for a road construction section using a road traffic communication-based roadside device and a vehicle terminal according to an exemplary embodiment of the present invention includes a mobile DSRC RSU And the mobile DSRC RSU 100 is connected to a vehicle equipped with a vehicle terminal (OBU) 600 passing through a construction section 600 of the road 500. The vehicle DSRC / WAVE communication (Vehicle to Infrastructure, V2I or Infrastructure to Vehicle) (E.g., GPS coordinates) and time information of the vehicle through the I2V. The travel delay time and the stagnant section (queue length) caused by the construction section 600 are calculated using the location information and the travel time information of the collected vehicles.

For example, the calculated congestion zone length and traffic delay time information provide information through RSU-OBU (V2I) communication when the vehicle is present within the range of 300 m to 1 km, which is an RSU communication enabled zone, If it exists outside the available area, it transfers information through RSU-OBU-OBU (I2V-V2V) communication. In this case, the construction section information can be provided from several kilometers to several tens of kilometers without installing additional facilities.

In addition, since roads that can bypass the construction section are usually located several kilometers to several tens of kilometers ago, this information can effectively improve the traffic mobility of the construction section. Of course, it is desirable to block the risk of personal information exposure by configuring all information related to the personal identification of each of the vehicles in I2V and V2V communication not to be transmitted or stored.

Accordingly, the road traffic service-based roadside apparatus and the road traffic service information providing system using the vehicle terminal according to the embodiment of the present invention can be implemented by using the mobile DSRC roadside apparatus 100 and the vehicle terminals 200 and 300, By passing the dynamically changing queue length and traffic delay time information to the rear vehicle in real time, it is possible to overcome the limitations of safety facilities on the road construction area according to the conventional technology, can do.

Meanwhile, FIG. 7 is a diagram for explaining the collection of vehicle location information and travel time information in a road traffic service-based roadside device and a road construction section traffic information providing system using a vehicle terminal according to an embodiment of the present invention.

The information collected by the road construction section traffic information system according to the embodiment of the present invention is the length of the congestion section and the traffic delay time caused by the construction section. For this purpose, as shown in FIG. 7, a mobile DSRC roadside apparatus 100 is installed so that an I2V communicable area (RSU communicable area) from an RSU-OBU communication start point to a construction section end point is formed.

The mobile DSRC RSE 100 periodically transmits an information request message to the first vehicle terminal 200 in the RSU communication coverage area to collect the construction section congestion section length and traffic delay time information. If the first vehicle terminal 200 is present at the "RSU-OBU communication start point ", the first vehicle terminal 200 collects the congestion section length and the traffic jam time information with the mobile DSRC roadside apparatus 100 Communication is started.

In this case, if there are a plurality of vehicle terminals (OBU) at the "RSU-OBU communication start point ", communication with the vehicle terminal (OBU) at the greatest distance from the mobile DSRC roadside apparatus 100 is started.

Also, in case that the first vehicle terminal 200 operates in a construction section (a construction vehicle, etc.) during a communication between the RSU-OBU and the construction section runs abnormally through a U-turn or the like, the mobile DSRC roadside apparatus 100 Is configured to have a periodic reset time (when communication with the first vehicle terminal 200 is not performed for a predetermined time or when the same communication terminal is present at the same position for a long time).

At this time, the time point of the congestion section (queue length) is set to a point where it is reduced to 50% (variable) or less compared with the speed limit of the corresponding section, and the traffic congestion time is set to RSU communication from the congestion section length To the end point of the construction section, which is the end point of the area, as the travel time that the first vehicle terminal 200 traveled.

In addition, according to the embodiment of the present invention, the road traffic communication-based roadside device and the road construction section traffic information providing system using the vehicle terminal have only one mobile DSRC RSU in the construction section, Matrix, and congestion information in real time. This system can be utilized as element technology of next-generation ITS (C-ITS) based on DSRC / WAVE communication which is actively being promoted by the Ministry of Land, Transport and Tourism in order to reduce traffic accidents by 40%.

In order to effectively operate the road construction section traffic information providing system using the road traffic communication-based roadside apparatus and the vehicle terminal according to the embodiment of the present invention, a vehicle terminal (OBU) capable of real-time communication with the mobile DSRC roadside apparatus (RSU) It is expected that there will be a large number of vehicles installed, which will be increased as the highway high-pass terminal is currently being developed as C-ITS is actively promoted in the future. In addition, the road construction section traffic information system according to the embodiment of the present invention may be combined with a vehicle black box or the like, which is currently required to be installed in a commercial vehicle.

[How to Provide Traffic Information on Road Construction Section]

8 is a flowchart illustrating a method of providing traffic information for a road construction section using a road traffic communication-based roadside device and a vehicle terminal according to an embodiment of the present invention.

Referring to FIG. 8, a method for providing traffic information for a road construction section using a road traffic communication-based roadside apparatus and a vehicle terminal according to an embodiment of the present invention includes: An RSU 100 is installed (S110).

Next, a congestion section viewpoint, a congestion section endpoint, and an RSU communication coverage area are set corresponding to the position of the mobile DSRC roadside apparatus 100 (S120).

Next, the first vehicle terminal (OBU) 200 passing through the construction section 600 and the mobile DSRC roadside apparatus 100 collect vehicle location information and traffic time information through road traffic communication (S 130) . Here, the road traffic-only communication is preferably DSRC / WAVE communication capable of performing V2I communication or I2V communication.

Next, the mobile DSRC roadside apparatus 100 calculates a congestion section length and a traffic delay time due to the construction section 600 in accordance with the vehicle location information and the travel time information (S140). The length of the congestion section indicates a length of a vehicle waiting queue in the construction section 600 that is a distance to a point at which the speed of the vehicle in the RSU communication coverage area is drastically reduced and the traffic delay time passes through the construction section 600 The travel time of the vehicle. Specifically, the time point of the congestion period (queue length) is set to a point where it is variably reduced to 50% or less of the limit speed of the corresponding interval, and the traffic congestion time is set to a point The travel time of the first vehicle terminal 200 can be set to the end point of the construction section, which is the end point.

Next, the mobile DSRC RSE 100 performs a no-car communication (V2I communication) with the first vehicle terminal 200 in the RSU communication enabled area mounted on the construction section entry vehicle, And the traffic delay time information is transmitted (S150).

Next, the first vehicle terminal 200 in the RSU communication area performs communication (V2V communication) with the second vehicle terminal 300 outside the RSU communication enabled area mounted on the rear section vehicle in the construction section, The length of the congestion zone and the information of the traffic lag time are transmitted (S160).

For example, when the vehicle exists in an RSU communicable area of 300 m to 1 km, the mobile DSRC RSE 100 transmits the calculated congestion section length and traffic delay time information via an RSU-OBU (V2I communication) OBU-OBU (I2V-V2V communication) when the vehicle is located outside the RSU communication coverage area in step f).

When the first vehicle terminal 200 is present at the "RSU-OBU communication start point ", the first vehicle terminal 200 acquires congestion section length and traffic jam time information with the mobile DSRC roadside apparatus 100 Communication with the vehicle terminal (OBU) located the farthest distance from the mobile DSRC roadside apparatus 100 when a plurality of vehicle terminals (OBU) exist at the "RSU-OBU communication start point" do.

Also, in case that the first vehicle terminal 200 is traveling in a construction section abnormally through a stop (construction vehicle, etc.) or a U-turn during communication between the RSU-OBU, the mobile DSRC roadside apparatus 100 may periodically set a reset time that disables communication with the first vehicle terminal 200 when the mobile terminal 100 does not perform data communication for a predetermined time or exists at the same position for a long time.

Meanwhile, FIG. 9 is a diagram showing how V2I and V2V communication are linked to provide information in a road traffic communication-based roadside apparatus and a road construction section traffic information providing method using a vehicle terminal according to an embodiment of the present invention, FIG. 10 is a diagram for explaining a direction setting for providing information in the road traffic communication-based roadside apparatus and the road construction section traffic information providing method using the vehicle terminal according to the embodiment of the present invention.

Referring to FIG. 9, in the case of V2V communication, if all the vehicles having received the information link the same information, there is a possibility that communication overload will occur. In order to prevent this, the road construction section traffic information system according to the embodiment of the present invention sets a time band (tb) so that a distance from the mobile DSRC RSE 100 It is possible to transmit the received congestion section length and traffic delay time information only to the vehicle terminal having the largest in-band time band.

In addition, since DSRC / WAVE is capable of communication in all directions, there is a possibility that information may be linked in opposite directions when linking information between OBUs. 10, in the road construction section traffic information system according to the embodiment of the present invention, the mobile DSRC roadside apparatus 100 is configured to transmit the congestion section length and the traffic delay time information between vehicle terminals A virtual communication triangle is constructed in consideration of the characteristics of the mobile DSRC roadside apparatus 100 and the corresponding construction section 600 route so that the information is not transmitted in the opposite direction and information received only in the vehicle terminal existing in the communication triangle .

The length information and the travel delay time information resulting from the collected construction section are transmitted to the rear vehicle through I2V (the vehicle exists in the RSU communication area) or I2V-V2V (the vehicle exists outside the RSU communication area) / RTI >

Even if the communication triangle is set as described above, information can be transmitted to the intersection road OBU existing in the communication triangle as shown in FIG. 10, and there is a possibility that the intersection road OBU links the information only to the intersection road behind do. In order to prevent this, it is necessary to check the position between the vehicle terminal that has transmitted the congestion section length and the traffic jam time information, the position of the congestible section length and the vehicle terminal that receives the traffic jam time information, Value, it is possible to transmit the information backward. For example, as a result of the check, only when the position difference between the two vehicle terminals is within a threshold value (for example, +/- 10 degrees), the received information is rearranged to the rear.

Also, it may happen that the information between the front and rear vehicles during the information connection between the vehicle terminals is repeatedly transmitted in the same section. In order to prevent this, the vehicle terminal checks the position of the vehicle terminal, which has transmitted the information when receiving the information, the position of the mobile DSRC roadside apparatus 100, and the position of the vehicle, If it is in proximity to the mobile DSRC roadside apparatus 100, it is desirable to delete the received information.

According to a report by the Texas Transportation Institute (TTI) in the United States, the provision of real-time traffic information for road construction projects allows 15-85% of all passengers to use bypass roads with no congestion, , And it is reported that it reduces the speed of the passing vehicle by 6 ~ 10 km / h and consequently improves the traffic safety and mobility.

In addition, according to the report of the Dutch government research institute, it is possible to prevent the first accident by 15 ~ 25% and prevent the second accident by 40 ~ 50% if the variable speed limit and the traffic delay time information are properly provided in the construction section , And the resulting increase in road capacity is 4 ~ 5%. As a result of evaluating the system of providing the information of the work area queue in Amsterdam, it was reported that the collision accident by 23% was reduced, the traffic accident by 35% was decreased, and the second accident by 46% was decreased.

In Germany, too, an evaluation of the queue and lane control systems in autobahn has been reported to reduce accidents by 20%.

As a result, according to the embodiment of the present invention, the congestion section length and the traffic delay time information of the construction section due to the road construction are collected in real time on the basis of the DSRC / WAVE- It can prevent traffic accidents such as accidents and minimize traffic congestion caused by construction work. In addition, according to the embodiment of the present invention, since the traffic delay time information is provided to the vehicle for passing the construction section, the backward vehicle does not experience unnecessary delay through the use of the bypass road and the departure time adjustment, Thereby maximizing the efficiency.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Portable DSRC RSU
200, 200a, 200b: a first vehicle terminal (OBU) in an RSU communication area,
300, 300a, 300b: a second vehicle terminal (OBU) outside the RSU communicable area,
400: Traffic Information Center
500: Road
600: Construction section
110: RSU control unit
120: congestion section length calculating section
130: travel delay time calculating section
140: DSRC transceiver
210 and 310: OBU control unit
220, and 320: a data storage unit
230, 330: DSRC transmission /

Claims (16)

  1. The communication terminal 100 is installed in the construction section 600 on the road 500 and performs communication for exclusive use of road traffic by setting the congestion section time point, the congestion section end point and the RSU communication possible area, (RSU) 100 for calculating a congestion section length and a traffic delay time caused by the construction section 600 in accordance with the travel time information;
    The mobile station is mounted on a vehicle passing through a construction section 600 on the road 500 and transmits vehicle location information and travel time information to the mobile DSRC roadside apparatus 100 in the RSU communication coverage area, A first vehicle terminal (OBU: 200) in at least one or more RSU communication coverage areas for receiving congestion zone length and traffic jam time information from the device (100); And
    (V2V communication) between the first vehicle terminal (200) and the second vehicle terminal (300) out of the at least one RSU communication coverage area receiving the congestion section length and the traffic delay time information outside the RSU communication coverage area )
    , ≪ / RTI &
    The road traffic dedicated communication is DSRC (Dedicated Short Range Communications) / WAVE (Wireless Access for Vehicular Environment) communication capable of performing V2I (Vehicle to Infrastructure) communication or I2V (Infrastructure to Vehicle)
    The mobile DSRC roadside apparatus 100 may be connected to the RSU-OBU through a predetermined time data communication mode in order to prevent the first vehicle terminal 200 from abnormally traveling through the construction section through the construction section or the U- And a reset time period for stopping communication with the first vehicle terminal (200) is periodically set when the vehicle is in the same position for a long period of time. Information providing system.
  2. The method according to claim 1,
    The length of the congestion section represents the length of the vehicle queue in the construction section 600, which is the distance from the RSU communication area to the point where the speed of the vehicle is drastically reduced. The traffic delay time is the length of the construction section 600 And the traffic information of the vehicle passing through the road is transmitted to the road-traffic communication-based roadside device.
  3. 3. The method of claim 2,
    The time point of the congestion section length is set to a point at which the congestion section length is variably reduced to 50% or less of the limit speed of the corresponding section, and the traffic delay time is set to a point of time from the congestion section point to the end point of the construction section, Wherein the first traffic information is set as a travel time during which the first vehicle terminal (200) travels, and a traffic information provision system for a road construction section using the vehicle terminal.
  4. The method according to claim 1,
    When the vehicle is present within a range of 300 m to 1 km that is an RSU communication area, the mobile DSRC roadside apparatus 100 provides the calculated congestion zone length and traffic delay time information through RSU-OBU (V2I) communication, And transmits the calculated congestion section length and traffic delay time information through the RSU-OBU-OBU (I2V-V2V) communication when the RSU exists outside the RSU communication coverage area. Traffic Information Providing System for Road Construction Area Using.
  5. 2. The mobile DSRC RS as claimed in claim 1,
    A congestion zone length calculating unit 120 for calculating a vehicle queue length in the construction section 600 according to the vehicle location information received from the first vehicle terminal 200;
    A travel delay time calculating unit 130 for calculating a travel delay time in the construction section 600 according to the travel time information received from the first vehicle terminal 200; And
    Vehicle-to-vehicle (V2I) communication with the first vehicle terminal 200 to receive vehicle location information and traffic time information from the first vehicle terminal 200, A DSRC transceiver 140 for transmitting a length and a travel delay time to the first vehicle terminal 200,
    And a traffic information provision system for a road construction section using a vehicle terminal.
  6. 6. The method of claim 5, wherein each of the first vehicle terminal (200) and the second vehicle terminal (300)
    A data storage unit (220, 320) for storing the congestion section length and traffic delay time information received from the mobile DSRC roadside apparatus (100); And
    Transmits the vehicle location information and travel time information to the mobile DSRC RSE 100 by performing V2I communication with the mobile DSRC RSE 100, and transmits the vehicle location information and travel time information from the mobile DSRC RSE 100 to the mobile station A DSRC transceiver unit 230, 330 for receiving time information and performing V2V (Vehicle to Vehicle) communication, which is communication between another vehicle terminal and the vehicle, to transmit the received congestion section length and traffic delay time information to other vehicle terminals,
    And a traffic information provision system for a road construction section using a vehicle terminal.
  7. a) installing a mobile DSRC RSU (100) on a construction section (600) on a road (500);
    b) establishing a congestion section point, a congestion section end point, and an RSU communicable area corresponding to the position of the mobile DSRC roadside apparatus 100;
    c) collecting vehicle location information and travel time information through a first vehicle terminal (OBU) 200 passing through the construction section 600 and the mobile DSRC roadside apparatus 100 through road traffic communication;
    d) calculating the congestion section length and the traffic delay time due to the construction section (600) according to the vehicle location information and the traveling time information, by the mobile DSRC roadside apparatus (100);
    e) The mobile DSRC RSE 100 performs a no-car communication (V2I communication) with the first vehicle terminal 200 in the RSU communication enabled area mounted on the construction section entry vehicle to calculate the congested section length and the passage Transmitting delay time information;
    f) the first vehicle terminal 200 in the RSU communication area performs inter-vehicle communication (V2V communication) with the second vehicle terminal 300 outside the RSU communicable area mounted on the rear section vehicle in the construction section, And transmitting the congestion zone length and the traffic jam time information,
    The road traffic dedicated communication is DSRC / WAVE communication capable of performing V2I communication or I2V communication,
    The mobile DSRC RSE 100 may be configured such that the first vehicle terminal 200 may travel in a construction section in an abnormal state during a construction period through a stop or a U-turn during communication between the RSU and the OBU in step c) Based on the road-traffic-dedicated communication-based roadside device and the vehicle terminal, a reset time period in which communication with the first vehicle terminal (200) is interrupted when the vehicle does not perform data communication for a predetermined period of time or exists at the same position for a long time period. A method of providing traffic information for a road construction section.
  8. 8. The method of claim 7,
    The length of the congestion section indicates a length of a vehicle waiting queue in the construction section 600 that is a distance to a point at which the speed of the vehicle in the RSU communication coverage area is drastically reduced and the traffic delay time passes through the construction section 600 And the traffic information of the road is transmitted to the roadside communication terminal.
  9. 9. The method of claim 8,
    The time point of the congestion section length is set to a point at which the congestion section length is variably reduced to 50% or less of the limit speed of the corresponding section, and the traffic delay time is set to a point of time from the congestion section point to the end point of the construction section, Wherein the traffic information is set as a travel time of the first vehicle terminal (200).
  10. 8. The method of claim 7,
    If the vehicle exists in the range of 300 m to 1 km, which is an RSU communication coverage area, the mobile DSRC RSE 100 transmits the calculated congestion section length and traffic delay time information via the RSU-OBU (V2I communication) OBU-OBU (I2V-V2V communication) when the vehicle exists outside the RSU communicable area in step (f), and transmits the calculated congestion section length and the traffic delay time information through the RSU-OBU-OBU Traffic - dedicated communication - based roadside device and method for providing traffic information of road construction section using vehicle terminal.
  11. 8. The method of claim 7,
    If the first vehicle terminal 200 is present at the "RSU-OBU communication start point" in the step c), the first vehicle terminal 200 transmits the congestion zone length and the traffic jam to the mobile DSRC roadside apparatus 100, OBU communication start point ", and when there are a plurality of vehicle terminals (OBU) at the" RSU-OBU communication start point ", the vehicle terminal OBU ) Based on the road-traffic information, and communication method of the road construction section using the vehicle terminal.
  12. delete
  13. 8. The method of claim 7,
    In the case of the V2V communication in the step f), the mobile DSRC roadside apparatus 100 sets a time band (tb) so that all the vehicles receiving the information can prevent communication overload due to the same information linkage, And the traffic jam length information and the traffic jam time information received only to the vehicle terminal having the largest time band with the greatest separation distance from the DSRC roadside apparatus 100 are transmitted. How to Provide Traffic Information in Road Construction Section.
  14. 14. The method of claim 13,
    The mobile DSRC RSE 100 may be configured such that the mobile DSRC RSE 100 and the corresponding construction section 600 route characteristics are set so that information is not transmitted in the opposite direction when the congestion section length and the travel delay time information between the vehicle terminals are transmitted Wherein the communication triangle forms a virtual communication triangle and transmits the received information only to the vehicle terminal existing in the communication triangle.
  15. 15. The method of claim 14,
    In step f), the position of the vehicle terminal that has transmitted the congestion section length and the traffic delay time information is checked with respect to the position of the vehicle terminal that has received the congestion section length and the traffic delay time information, And transmits the information to the rear only if the traffic information is within a predetermined threshold value.
  16. 8. The method of claim 7,
    The vehicle terminal checks the position of the vehicle terminal that has transmitted the information, the position of the mobile DSRC roadside apparatus 100, and the position of the mobile terminal that transmitted the information on receipt of the congestion section length and the travel delay time information, Wherein the information is deleted when the mobile terminal is closer to the mobile DSRC roadside apparatus 100 than a vehicle terminal.
KR1020140154501A 2014-11-07 2014-11-07 System for providing traffic information of road work zone using dedicated road traffic communication-based roadside unit (rsu) and onboard unit (obu), and method for the same KR101615970B1 (en)

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