KR101385217B1 - Roadside control equipment and method and system for processing traffic information using the same - Google Patents

Abstract

A roadside control device for communicating with a signal controller for controlling a traffic signal and a vehicle-mounted device mounted on a vehicle entering the area in which the traffic signal is installed, the roadside control device comprising: a signal information receiving unit for receiving signal information about a traffic signal from the signal controller; A vehicle information obtaining unit obtaining position information and speed information of the corresponding vehicle from the on-vehicle device; An estimator configured to estimate the position of the vehicle at a first time interval using the position information and the speed information; An instruction signal generator configured to generate an instruction signal for safe driving of the vehicle based on the signal information, the speed information, and the estimated current position; And an instruction signal transmitter configured to transmit the instruction signal generated by the instruction signal generator to an on-vehicle device or the signal controller of the vehicle and a traffic control method using the instruction signal.

Description

Roadside control device and method and system for processing traffic information using same {ROADSIDE CONTROL EQUIPMENT AND METHOD AND SYSTEM FOR PROCESSING TRAFFIC INFORMATION USING THE SAME}

The present invention relates to a roadside control device that is installed in the vicinity of the area where the traffic signal is installed to receive and process traffic information, and a traffic information processing method and system using the same. A roadside control device that collects information and receives location information and speed information of the vehicle from a vehicle-mounted device mounted on a vehicle within a predetermined range, and generates a signal for safe driving based on these information, and traffic information processing using the same. It relates to a method and a system.

Traffic signals are installed on the roads, especially at intersections, to facilitate traffic flow and prevent traffic accidents. Even though traffic signals are installed, traffic accidents at intersections are still uninterrupted. The reason for the accident is that although the signal of the driver is not accepted, the response of the driver to the delayed response or the signal change due to the signal change is quick, but the delayed response of the following vehicle is also included in the cause. To avoid confusion caused by sudden switchover of the signal, a three-color signaling scheme, which displays a yellow signal before the conversion from a green signal to a red signal, is widely used. However, when entering the intersection at a constant speed in the green signal, when the green signal is switched to the yellow signal, the driver must decide whether to stop or slow down or pass through the intersection. Whether you can stop at an appropriate location or exit the intersection before the yellow signal is converted to a red signal, however, can depend on the current location and speed of the vehicle. Conventionally, this judgment has been left to the intuition of the driver only. Although the driver recognized the yellow signal but continued because it could not stop in front of the stop line, the driver could not exit the intersection until the yellow signal was over, and the section where the vehicle exists from the start point to the end point of the yellow signal Is called a "dilemma interval". This dilemma hinders smooth traffic flow and sometimes causes traffic accidents.

Techniques related to this have been proposed in, for example, Korean Patent Publication No. 2009-0061782, Korean Patent Publication No. 2010-0104740, and Korean Patent Publication No. 2006-0059642. Japanese Laid-Open Patent Publication No. 2009-0061782 discloses an intersection dictionary information notification system using a short distance dedicated communication and a notification method thereof. Here, a vehicle terminal (on-vehicle device) transmits speed and distance information, And determines whether or not the vehicle has passed safety. At this time, the position information of the vehicle is determined by the signal received from the GPS satellite by the GPS receiving unit. However, it is easy to recognize that in order to be more sensitive to traffic conditions and take more effective and appropriate measures, it is necessary to be aware of changing situations at shorter time intervals and make new judgments. When determining the position of, the reception period of the signal from the GPS satellites (commonly known as 1 sec) is the shortest time interval. However, it is necessary to judge at a shorter time interval for more accurate judgment.

When determining whether to drive safely on the basis of the conventional position information obtained only once, there are the following problems.

(1) Since the notification about the passage of the intersection is generated by using the speed information and the distance information received from the vehicle terminal at a certain point in time, if the vehicle is applied in a real traffic situation where the speed and distance of the vehicle change frequently, the accuracy of the overall system Can be significantly reduced.

(2) If it is determined that the vehicle cannot pass the intersection within a certain signal state, it only discloses that a signal requesting a deceleration or stop determination can be transmitted or displayed to the vehicle terminal, and the vehicle is stopped even after receiving such a signal. It does not disclose anything about the countermeasures when attempting to cross an intersection without attempting to do so.

Accordingly, the present invention provides a roadside control device capable of generating a signal for safe driving of a vehicle at shorter time intervals, compared to relying on a signal from a GPS satellite to obtain position information of a conventional vehicle, and a traffic control method using the same. And to provide a system.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical subjects which are not mentioned can be clearly understood by those skilled in the art from the description of the present invention .

In order to overcome these problems, a roadside control device according to an aspect of the present invention is a roadside control device that communicates with a vehicle controller mounted on a vehicle entering a zone where a signal controller for controlling a traffic signal and a traffic signal is installed, A signal information receiver configured to receive signal information about a traffic signal from a signal controller; A vehicle information acquisition unit configured to receive position information and speed information of the vehicle from the on-vehicle device; A calculator configured to estimate a location of the vehicle at a first time interval using the location information and the speed information; An instruction signal generator configured to generate an instruction signal for safe driving of the vehicle based on signal information, speed information, and the estimated current position; And an instruction signal transmitter for transmitting the instruction signal generated by the instruction signal generator to a vehicle-mounted device or a signal controller of the vehicle.

According to such a configuration, by including the calculation unit that estimates the position of the vehicle at a constant time interval based on the acquired position information and the speed information, compared with the conventional case in which the position information is acquired from the signal from the GPS satellite, An updated instruction signal can be generated at shorter time intervals. This makes it possible to generate an instruction signal that is closer to the current traffic situation and to enable more effective and appropriate safe operation.

Here, the vehicle information obtaining unit obtains the position information of the vehicle at a second time interval, and obtains the speed information of the vehicle at a third time interval shorter than the second time interval, May be shorter than the time interval. Since the speed information can be acquired almost in real time from, for example, a CPU of the vehicle, updated speed information is acquired at a shorter time interval, and the generated speed information is used together with the estimated current position to generate instruction information, . ≪ / RTI >

Further, the roadside control device further determines whether the vehicle is present in a section (called 'dilemma section') in which the vehicle cannot safely make an entry or stop decision during the yellow period based on the signal information and the estimated current position. It may also include a configured calculator. If it is determined by the calculation unit that the vehicle is within the dilemma section and the remaining time of the green signal of the signal information is less than or equal to the predetermined time, the instruction signal generator generates an instruction signal for instructing the stop of the on-vehicle device and transmits the instruction signal to the instruction signal transmitter. And to transmit to the on-vehicle device. When the driver recognizes the warning signal, the driver may decelerate the vehicle, and the vehicle entering the dilemma section receives the warning signal and decelerates, thereby reducing the possibility of an accident at the intersection.

Further, when it is determined that the roadside control device does not decelerate with the stop determination based on the positional information and the speed information of the vehicle which transmitted the instruction signal for instructing the stop, the instruction signal generator instructs to request the extension of the green signal. It may be configured to generate a signal and send it to the signal controller by the indication signal transmitter. The signal controller that receives the signal extension request signal from the roadside control device extends the expiration time of the green signal of the signaling device so that the vehicle expected to pass through the intersection without stopping can safely pass through the intersection, The effect that the possibility is remarkably lowered can be obtained. At this time, it is preferable not to notify subsequent vehicles about the extension of the green signal. This is because drivers of subsequent vehicles who are notified that the green signal has been extended may ignore the warning and enter the intersection again.

If the roadside control device determines that the speed of the vehicle is decelerated without the vehicle being within the dilemma section, the roadside control device generates an instruction signal for instructing deceleration to the on-vehicle mounting apparatus that follows. The signal transmitter may be configured to transmit the instruction signal to the on-vehicle device of the subsequent vehicle. It may be very important to determine whether the speed of the vehicle is decelerated without the vehicle being within the dilemma section. This is because a traffic accident due to a collision between vehicles may occur not only because of a signal violation at an intersection but also when a collision with a subsequent vehicle occurs due to a rapid deceleration of the preceding vehicle in a section other than the intersection. In such a case, it is generally assumed that the case is caused by a breakdown of a vehicle or the like, or a case where the speed is rapidly decelerated for a lane change.

In addition, a traffic control method according to an aspect of the present invention is a traffic control method using a roadside control device that communicates with a vehicle controller mounted on a vehicle entering a zone where a signal controller for controlling a traffic signal and a traffic signal device are installed. Receiving signal information about the traffic signal from the signal controller; Obtaining location information and speed information of the corresponding vehicle from the on-vehicle device; Estimating a current position of the vehicle at a predetermined first time interval using the position information and the speed information; Generating an indication signal for safe driving of the vehicle based on the signal information, the speed information, and the estimated current position; And transmitting the instruction signal generated by the instruction signal generator to a vehicle-mounted device or a signal controller of the vehicle.

According to the present invention, unlike the conventional technique of acquiring positional information depending on a signal received from a GPS satellite, the positional information is estimated and updated, and the updated positional information is used together with the latest velocity information, It is possible to generate an instruction signal that is more suitable for the current traffic situation, thereby achieving a safer vehicle operation.

More specifically, the following effects can be obtained.

(1) By repeatedly estimating the position of the vehicle at the first time interval, the changing position of the vehicle is immediately reflected, and the determination and control in the dilemma section accordingly can be updated repeatedly. Accuracy improvement is possible.

(2) If the probability of a traffic accident increases due to the vehicle not receiving the deceleration due to the stop determination, which is located within the dilemma section and stops, the green signal of the signal controller is extended to pass the vehicle safely. The occurrence of traffic accidents caused by collision between vehicles can be significantly reduced.

(3) Furthermore, when the preceding vehicle decelerates even outside the dilemma section, by generating and transmitting an instruction signal indicating the deceleration of the preceding vehicle to the subsequent vehicle, collision between the vehicles due to the deceleration can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly describe the technical solution according to the invention or the embodiments of the prior art, the following figures are briefly introduced. Like reference numerals in the drawings denote like elements in other drawings. Other features and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which should be read in conjunction with the accompanying drawings, in which: FIG.
1 is a diagram showing an exemplary arrangement of a traffic information processing system installed at an intersection.
2 schematically shows an example of a traffic information processing system according to the present invention.
3 is a diagram schematically illustrating a configuration of a roadside control apparatus according to a first embodiment of the present invention.
4 is a flowchart illustrating a traffic control process of the present invention.
5 is a flowchart illustrating a traffic control process including a determination and control process for a dilemma section.
FIG. 6 is a flowchart illustrating a traffic control process including generating and transmitting an indication signal indicating stop.
7 is a flowchart illustrating a traffic control process including generating and transmitting a green signal extension request indication signal.
FIG. 8 is a flowchart illustrating a traffic control process including generating and transmitting an instruction signal indicating deceleration for a subsequent vehicle.
FIG. 9 is a diagram illustrating a flow of information between devices as a reference diagram to assist in understanding a traffic information processing method according to the present invention.

With reference to the accompanying drawings, the technical solutions and the advantages thereof of the embodiments of the present invention are described more clearly and completely in the following description. It will be apparent that the embodiments to be described are only a few of the embodiments of the present invention. Further, it is apparent that all other embodiments, which can be obtained by those skilled in the art based on the embodiments of the present invention without any creative effort, are within the scope of the present invention.

In order to clearly illustrate the present invention in the drawings, parts not related to the description may be omitted, and similar parts are denoted by like reference numerals throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

(System configuration)

Referring to FIG. 1, a traffic information processing system 100 according to the present invention includes a signal controller 103 for controlling a traffic signal 104 at an intersection, a roadside control device 101 for communicating with a signal controller 103, and a vehicle. And an on-vehicle device 102 mounted on and communicating with the roadside control device 101. The roadside control device 101 communicates with the signal controller 103 by wire or wireless communication, and exchanges information such as signal information or indication signal information, which will be described below. The on-vehicle device 102 communicates with the roadside control device 101 by wireless communication, and transmits and receives information such as signal information, vehicle position information, speed information, or indication signal information.

In one embodiment, the roadside control device 101 may be a road side equipment (RSE) installed on the side of the road, the vehicle-mounted device 102 may be On-Board Equipment (OBE). However, as long as the device is configured to perform substantially the same function as the roadside control device 101 according to the present invention, a device of another name may correspond to the roadside control device 101 or the on-vehicle device 102 here. The control device 101 or the on-vehicle device 102 may be independent devices, or may be installed or integrated in the same space as a device such as the signal controller 103 or the CPU of the vehicle. Moreover, the roadside control apparatus 101 may be anywhere as long as it can communicate with the vehicle-mounted apparatus 102 and the signal controller 103 also in the installation position.

In addition, the traffic information processing system 100 according to the present invention can be applied to any place that controls the traffic of the vehicle by the traffic signal 104 even if not the intersection as shown in FIG.

Figure 2 shows the configuration of the traffic information processing system of the present invention more easily.

The roadside control device 201 is a device for communicating with the on-vehicle device 202 mounted on the vehicle entering the area in which the traffic signal is installed. Preferably, the roadside control device 201 may be installed on the roadside. Anywhere as long as it can communicate with 203. The roadside control device 201 communicates with the vehicle-mounted device 202 as shown in the figure, and receives position information and speed information from the vehicle-mounted device 202, and uses the vehicle-mounted device to display the instruction signal information calculated using the roadside control device 201. Send to 202. In addition, the roadside control device 201 also communicates with the signal controller 203 as shown in the figure, and receives the signal information from the signal controller 203, and the signal controller 203 receives the green signal extension request information calculated using the same. To send). The roadside control device 201 generates an indication signal for safe driving of the vehicle based on the signal information received from the signal controller 203 and the position information and the speed information of the vehicle received from the on-vehicle device 202. The green signal extension request signal for requesting the green signal extension is generated and transmitted to the on-vehicle device 202 or the signal controller 203. The generation process of the instruction signal in the roadside control device 201 is preferably performed at a short time interval, and details thereof will be described later.

The on-vehicle device 202 may be any device mounted inside or outside the vehicle. The on-vehicle device 202 communicates with the roadside controller 201 as shown in the figure, transmits the position information and the speed information to the roadside controller 201, and receives the instruction signal information from the roadside controller 201. do.

The signal controller 203 may include a switch for manually switching signals, and the like, but normally outputs a control signal to the traffic signal at a predetermined time interval. The signal controller 203 may be configured to, for example, switch signals in accordance with a preprogrammed processing flow. The signal information provided by the signal controller 203 to the roadside control device 201 may include information regarding the color and / or the switching pattern and the switching timing of the current traffic signal. Any information that can predict the current signal state and future signal transitions is irrelevant to any form of information. For example, the signal information may include information indicating the current lighted color and the time remaining until conversion to another color. In addition, it may include information indicating the lighting time for each color. When the signal switching pattern and the switching time are predetermined, the roadside controller 201 stores the predetermined switching pattern and the switching time and provides periodic signal information only by synchronizing with the signal controller 203. May be unnecessary. Alternatively, the signal controller 203 also outputs the same signal to the roadside control device 201 as the signal output to the traffic signal so that the roadside control device 201 can recognize the current state of the traffic signal in real time. good. Alternatively, the roadside control device 201 may be connected to the traffic signal instead of the signal controller 203 to detect and recognize the current state of the traffic signal. In this case, the current state of the traffic signal may be recognized in real time. There is a recognizable advantage. In addition, there may be various methods of providing signal information to the roadside control device 201. Any method can be used as long as the current state of the traffic signal can be recognized.

On the other hand, when there are a plurality of vehicles entering the intersection, the plurality of onboard devices 202 mounted in each vehicle may transmit the position information and the speed information of the vehicle to the roadside control device 101, and the roadside control device. The 201 may use this to generate an indication signal instructing the subsequent vehicle to decelerate, and may transmit it to the on-vehicle device 202 of the subsequent vehicle.

In the above, the schematic configuration of the traffic information processing system using the roadside control device 201 according to the present invention has been described. The main feature is the roadside control device 201 and the details of the roadside control device 201 according to the present invention are described below. An example of the configuration will be described through embodiments.

(Embodiment 1)

Referring to FIG. 3, the roadside control device 300 according to the first embodiment of the present invention may include a signal information receiver 301, a vehicle information acquirer 302, a calculator 303, and an instruction signal generator 304. , And an indication signal transmitter 305.

The signal information receiver 301 is configured to receive signal information about a traffic signal from a signal controller that controls the traffic signal. Specifically, the signal information about the traffic signal includes the current signal information indicating the type of the current signal (for example, a red signal, a yellow signal, or a green signal), and the remaining time information indicating the time to be continued before the current signal is changed to another signal. Although may include, any kind of information may be used as long as the color of the current signal and the subsequent conversion pattern can be specified.

The vehicle information acquisition unit 302 is configured to acquire position information and speed information of the vehicle from the on-vehicle device mounted on the vehicle. The vehicle information acquisition unit 302 may obtain location information and speed information of the vehicle from the GPS satellites. In one embodiment, the vehicle information acquisition unit 302 may obtain the position information of the vehicle at a second time interval, and may obtain the vehicle speed information at a third time interval shorter than the second time interval. For example, the vehicle information acquisition unit 302 may acquire location information of the vehicle at intervals of 1 sec (period for receiving a signal from the GPS satellites), and obtain vehicle speed information at least 100 msec. Since the vehicle speed information can be acquired directly from the CPU or speed measuring device of the vehicle, it is possible to obtain the vehicle speed information at a shorter time interval than the position information acquired using the GPS satellite.

The calculating unit 303 is configured to estimate the current position of the vehicle at a first time interval using the obtained position information and the speed information of the vehicle. Since the position and speed of the vehicle can change rapidly even in a very short time, it is necessary to repeatedly estimate the position of the vehicle to improve the accuracy of traffic control. Accordingly, in the roadside control apparatus according to the first embodiment, the position information and the speed information obtained by the vehicle information obtaining unit 302 by the calculating unit 303 are used to obtain the position information of the vehicle at shorter time intervals. To estimate the position of the vehicle at a first time interval. In one embodiment, the first time interval may be shorter than the second time interval, and may be a periodic time interval that is regularly repeated, but is not limited thereto, and may be an aperiodic time interval.

The instruction signal generator 204 is configured to generate an instruction signal for safe driving of the vehicle based on the signal information, the speed information, and the estimated current position. For example, when the speed information of the vehicle is acquired at intervals of 100 msec, a new position is estimated at intervals of 100 msec with the position information obtained at intervals of 1 sec and the speed information obtained at intervals of 100 msec. Then, the updated position information and speed information can be obtained at intervals of at least 100 msec, and when the instruction signal is generated based on this, the instruction signal can be generated at intervals of at least 100 msec. In detail, the indication signal is an indication signal indicating a stop for stopping the vehicle for safety, or an indication signal indicating a deceleration of a subsequent vehicle to prevent collision between vehicles, and an extension of a green signal requesting the extension of the green signal. It may be a request signal.

The instruction signal transmitter 305 is configured to transmit the instruction signal generated by the instruction signal generator 304 to the on-vehicle device or signal controller of the vehicle. If the indication signal is an indication signal for instructing stop, the generated indication signal is transmitted to the in-vehicle device by the indication signal transmitter 305. In addition, if the instruction signal is an instruction signal for instructing deceleration of a subsequent vehicle, the generated instruction signal is transmitted by the instruction signal transmitter 305 to the on-vehicle device of the subsequent vehicle. On the other hand, if the signal is a green signal extension request signal, the generated indication signal is transmitted to the signal controller by the indication signal transmitter 305.

Referring to Fig. 4, a traffic information processing method using a roadside control apparatus according to a first embodiment of the present invention will be described. The traffic information processing method in this embodiment includes the following steps.

Step 401: The signal information receiver 301 receives signal information about a traffic signal from the signal controller 203 which controls the traffic signal. As described above, the signal information on the traffic signal may include the current signal information and the remaining time information, but the type and number of the signal information are not limited.

Step 402: The vehicle information acquisition unit 302 receives the position information and the speed information of the vehicle from the on-vehicle device mounted on the vehicle. In one embodiment, the vehicle information acquisition unit 302 may repeatedly receive the location information and the speed information of the vehicle at the same time interval, the location information is received at a second time interval, the speed information is a second time interval It may be received at a shorter third time interval.

Step 403: The calculating unit 303 estimates the position of the vehicle at the first time interval using the obtained position information and the speed information of the vehicle. As described above, in order to more accurately estimate the position of the vehicle which changes every time, it is necessary to acquire the speed information at intervals shorter than the time interval for acquiring the position information. Furthermore, the shorter the time interval at which the speed information is obtained, the more accurate vehicle position estimation is possible. Thus, in one embodiment, the first time interval may be shorter than the second time interval of step 402.

Step 404: The instruction signal generator 304 generates an instruction signal for safe driving of the vehicle based on the signal information, the speed information, and the estimated current position. The indication signal may be any one of an indication signal for instructing stop for the on-vehicle device, an indication signal for instructing deceleration of a subsequent vehicle, or an indication signal for requesting a green signal extension to the signal controller, which will be described in detail below. It may be, but is not limited to this, it can be understood that various forms of application is possible. The instruction signal generator 304 may generate the instruction signal at the first time interval in response to estimating the position of the vehicle at the first time interval. Since estimating the position of the vehicle at the first time interval is to improve the overall accuracy of traffic control by estimating the position of the vehicle more accurately as described above, the vehicle is estimated using the position estimated at the first time interval. In order to give an accurate indication of, it may be necessary to generate an indication signal also at a first time interval.

Step 405: The instruction signal transmitter 305 transmits the instruction signal generated by the instruction signal generator 304 to the on-vehicle device or signal controller of the vehicle. The content transmitted according to the type of the indication signal generated by the indication signal generator 304 is the same as that described above, and thus will be omitted. The step then ends.

Referring to FIG. 5, another example of a traffic information processing method using a roadside control apparatus according to a first embodiment of the present invention is shown, and the traffic information processing method includes the following steps.

Steps 501 to 503: are the same as steps 401 to 403 of FIG. 4.

Step 504: The calculating unit 303 further determines whether the vehicle exists in the dilemma section based on the signal information and the estimated current position. The dilemma section, as defined above, is understood to mean a section in which the vehicle cannot safely make an entry or stop decision during the yellow period. The range of such a dilemma section is calculated for each vehicle by the calculation unit 303 of the roadside control device 300 in consideration of the positional information and the speed information of the vehicle within the range controlled by the roadside control device 300. Although it may be determined differently, the present invention is not limited thereto, and may be predetermined in a predetermined section in consideration of traffic conditions of a range controlled by the roadside control device 300. In this case, the predetermined dilemma section may be stored in the calculator 303, but is not limited thereto and may be stored in another configuration of the roadside control device 300. The calculation unit 303 compares the current position of the vehicle estimated at the first time interval with the vehicle position information and the speed information, and the calculated or pre-stored dilemma section to determine whether the vehicle exists in the dilemma section. If it is determined that it is determined to move to step 505, if it is determined that it does not exist in the dilemma section, it returns to step 501.

Steps 505 to 506: are the same as steps 404 to 405 of FIG. 4. The step then ends.

(Second Embodiment)

Referring to FIG. 6, another example of a traffic information processing method using a roadside control apparatus according to a first embodiment of the present invention is shown, and the traffic information processing method includes the following steps.

Steps 601 to 604: are the same as steps 501 to 504 of FIG. 5.

Step 605: If it is determined in operation 604 that the vehicle is in the dilemma section, the operation unit 303 determines the remaining time of the green signal among the signal information received by the signal information receiving unit 301. Compare with a predetermined time. In the signal information received by the signal information receiver 301, if the current signal information is green, the remaining time of the green signal is compared with the predetermined time Td. Here, the predetermined time Td may have different values depending on the position and the speed of the vehicle. The predetermined time Td may be stored in the calculator 303, but is not limited thereto and may be stored in another configuration of the roadside control device 300. As a result of the comparison, if it is determined that the remaining time of the green signal is less than or equal to the predetermined time, the flow moves to step 606, and if not, the flow returns to step 601.

Step 606: The instruction signal generator 304 generates an instruction signal for instructing to stop the on-vehicle device.

Step 607: The instruction signal transmitter 305 transmits the instruction signal to the on-vehicle device. The step then ends.

(Third Embodiment)

Referring to FIG. 7, another example of a traffic information processing method using a roadside control apparatus according to a first embodiment of the present invention is shown, and the traffic information processing method includes the following steps.

Steps 701 to 707: are the same as steps 601 to 607 of FIG.

Step 708: The operation unit 303 determines whether the vehicle decelerates to the stop determination based on the positional information and the speed information of the vehicle which has transmitted the instruction signal indicating the stop. Whether to decelerate with the stop determination may be determined by comparing the speed information of the vehicle before and after the transmission of the instruction signal of the vehicle which has transmitted the instruction signal indicating the stop. In this comparison, since the speed of the vehicle before the instruction signal is transmitted may be different in each case, and the deceleration rate required for stopping the vehicle may inevitably be different in each case, the instruction signal may be different. On the basis of the speed of the vehicle before being transmitted, the case where the speed of the subsequent vehicle is reduced by a certain ratio can be determined as the case of deceleration by the stop determination. For this purpose, the deceleration rate necessary to fall in the case of deceleration with the stop determination may be determined in advance according to each speed. Thereafter, if it is determined that the speed of the vehicle in which the instruction signal is transmitted is not decelerated above a predetermined deceleration rate, the process moves to step 709.

Step 709: The instruction signal generator 304 generates an instruction signal requesting the extension of the green signal and transmits it to the signal controller by the instruction signal transmitter 305. The step then ends.

(Fourth Embodiment)

Referring to FIG. 8, another example of a traffic information processing method using a roadside control apparatus according to a first embodiment of the present invention is shown, and the traffic information processing method includes the following steps.

Step 801 to Step 806: Same as step 501 to step 506 of FIG.

Step 807: The calculating unit 303 determines whether the speed of the vehicle is decelerated without the vehicle being in a dilemma section. The determination of whether the vehicle decelerates may be similar to determining whether the vehicle decelerates with a stop determination in step 708. That is, it may be determined by comparing the speed information before and after the vehicle, and it may be determined that the case where the speed of the subsequent vehicle is reduced at a predetermined rate based on the speed of the previous vehicle is determined as the case of deceleration. . To this end, according to each speed, the deceleration rate required to fall in case of deceleration may be predetermined. Thereafter, if it is determined that the speed of the vehicle is decelerated above the predetermined deceleration rate, the process moves to step 808, and if it is determined that the vehicle is not decelerated, the subsequent step ends.

Step 808: The instruction signal generator 304 generates an instruction signal for instructing deceleration to the on-vehicle mounting apparatus of the vehicle following the deceleration, and the instruction signal transmitter 305 follows the instruction signal in the vehicle of the vehicle. Transfer to the onboard device. The step then ends.

FIG. 9 is a diagram illustrating a flow of information between components in a traffic information processing system having a vehicle-mounted apparatus according to an embodiment as one component. When the vehicle enters an intersection or the like and is within the range of the roadside control device, a radio link is established between the vehicle-mounted device and the roadside control device. The roadside control device and the signal controller may be connected by wire or wirelessly. The roadside control device receives signal information from the signal controller periodically or aperiodically and stores the signal information. When a wireless link is established with the vehicle-mounted device of the vehicle entering the intersection, signal information is transmitted to the vehicle-mounted device of the vehicle Lt; / RTI > Alternatively, when the wireless link is established with the in-vehicle apparatus, the signal information may be received and transmitted to the in-vehicle apparatus. In addition, the roadside control device can also provide the preceding vehicle information, which is information on the position and speed of the preceding vehicle, to the onboard device of the vehicle. The roadside control device determines whether the vehicle is present in the dilemma section by using the acquired vehicle position information and speed information (preferably the estimated current position) together with the signal information received from the signal controller. If present, the indication signal may be generated and transmitted to the on-vehicle device, and the indication signal may not be generated if it is not within the dilemma section. Optionally, it is determined whether the preceding vehicle is decelerated, and if it is not decelerated, the instruction signal information indicating the deceleration of the subsequent vehicle is provided to the on-vehicle device of the subsequent vehicle. You may not. In addition, although not shown, when it is determined that the vehicle exists within the dilemma section, a signal indicating the deceleration is generated and transmitted to the on-vehicle device. Send the request signal to the signal controller.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are illustrative and explanatory only and are intended to be illustrative of the invention and are not to be construed as limiting the scope of the invention as defined by the appended claims. It is not. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (16)

A roadside control device for communicating with a signal controller for controlling a traffic signal and a vehicle-mounted device mounted on a vehicle entering the area in which the traffic signal is installed,
A signal information receiver configured to receive signal information about a traffic signal from the signal controller;
A vehicle information obtaining unit obtaining position information and speed information of the corresponding vehicle from the on-vehicle device;
A calculator configured to estimate a current position of the vehicle at a first time interval using the position information and the speed information;
An instruction signal generator configured to generate an instruction signal for safe driving of the vehicle based on the signal information, the speed information, and the estimated current position; And
An instruction signal transmitter for transmitting the instruction signal generated by the instruction signal generator to the on-vehicle device or the signal controller of the vehicle;
Lt; / RTI >
And the position information is obtained at a second time interval, and the speed information is obtained at a third time interval shorter than the second time interval. The method of claim 1,
The roadside control device, wherein the indication signal is generated at a first time interval. 3. The method according to claim 1 or 2,
And the calculating unit is further configured to determine whether the vehicle exists within a dilemma section based on the signal information and the estimated current position. The method of claim 3,
If it is determined by the calculator that the vehicle is within a dilemma section and the remaining time of the green signal of the signal information is less than or equal to a predetermined time, the instruction signal generator generates an instruction signal for instructing to stop the on-vehicle device. A roadside control device which transmits this to the on-vehicle device by the instruction signal transmitter. 5. The method of claim 4,
If it is determined that the vehicle is not decelerated by the stop determination based on the position information and the speed information of the vehicle which has transmitted the instruction signal for instructing the stop, the instruction signal generator generates an instruction signal for requesting the extension of the green signal and A roadside control device which transmits to the signal controller by an instruction signal transmitter. The method of claim 3,
If it is determined by the calculation unit that the speed of the vehicle is decelerated without being within the dilemma section, the instruction signal generator generates an instruction signal for instructing deceleration to the on-vehicle mounting device of the vehicle, A roadside control device for transmitting the instruction signal to the on-vehicle device of the subsequent vehicle by the instruction signal transmitter. In a traffic control method using a signal controller for controlling a traffic signal and a roadside control device for communicating with a vehicle-mounted device mounted on a vehicle entering the area in which the traffic signal is installed,
The roadside control device,
Receiving signal information about a traffic signal from the signal controller;
Obtaining location information and speed information of the vehicle from the on-vehicle device;
Estimating a current position of the vehicle at a predetermined first time interval using the position information and the speed information;
Generating an indication signal for safe driving of the vehicle based on the signal information, the speed information, and the estimated current position; And
Transmitting the generated indication signal to the on-vehicle device or the signal controller of the vehicle.
Lt; / RTI >
The location information is obtained at a second time interval, and the speed information is obtained at a third time interval shorter than the second time interval. 8. The method of claim 7,
And the indication signal is generated at a first time interval. 9. The method according to claim 7 or 8,
The estimating of the current position of the vehicle further includes determining whether the vehicle exists within a dilemma section based on the signal information and the estimated current position. 10. The method of claim 9,
If it is determined that the vehicle is within a dilemma section and the remaining time of the green signal of the signal information is determined to be less than or equal to a predetermined time, the roadside control device generates an indication signal for instructing the stop of the on-vehicle device and generates the indication signal. And transmitting to the onboard device. 11. The method of claim 10,
If it is determined that the vehicle is not decelerated by the stop determination based on the position information and the speed information of the vehicle which has transmitted the instruction signal for instructing the stop, the roadside control device generates an instruction signal for requesting the extension of the green signal and And transmitting the signal to a signal controller. 10. The method of claim 9,
If it is determined that the speed of the vehicle is decelerated without being within the dilemma section, the roadside control device generates an instruction signal for instructing deceleration to the on-vehicle device of a subsequent vehicle of the vehicle, thereby decelerating the deceleration. And transmitting the indicating instruction signal to the on-vehicle device of the subsequent vehicle. A roadside control device according to claim 1 or 2;
An on-vehicle device mounted on the vehicle entering the area where the traffic signal is installed; And
Signal controller to control traffic signal
Traffic control system comprising a. 3. The method according to claim 1 or 2,
A roadside control device, wherein the roadside control device exchanges information with the signal controller using wired or wireless communication, and exchanges information with the on-vehicle device using dedicated short range communication (DSRC). delete delete

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