KR101204422B1 - Method for sharing real-time traffic information between vehicles - Google Patents

Abstract

A real time traffic information sharing method between vehicles is provided. The real-time traffic information sharing method between vehicles according to the present invention includes receiving new traffic information, which is divided into a plurality of areas from adjacent vehicles and includes first and second traffic information of the plurality of areas; Correcting the stored traffic information stored in the own vehicle by reflecting the first traffic information of the same or nearer area of the own vehicle among the traffic information, and generating the remote traffic of the remote area other than the predetermined range from the received new traffic information. And replacing the stored traffic information stored in the corresponding position of the own vehicle with the traffic information, and displaying the stored traffic information stored in the renewed vehicle on the screen of the display device.

Description

How to share real-time traffic information between vehicles {METHOD FOR SHARING REAL-TIME TRAFFIC INFORMATION BETWEEN VEHICLES}

The present invention relates to a method for sharing real-time traffic information between vehicles, and more particularly, to a method for calculating and rapidly sharing traffic information of a vehicle driving on a road in real time.

A technology for transmitting traffic information to a vehicle running on a road has been proposed and commercialized. As shown in FIG. 1, a conventional system for transmitting traffic information uses TPEG (Transport Protocol Expert Group) information installed in a navigation with a built-in DMB receiver using a digital multimedia broadcasting (DMB) broadcasting network. Receive it, convert it accordingly, and display it on the navigation map screen.

TPEG is the name of an association affiliated with the European Broadcasting Union in 1997. It is a transmission standard that is defined to transmit information here. The term TPEG is generally used to mean real-time traffic information service. TPEG is a service that provides comfortable guidance to destinations, avoiding traffic congested roads and roads controlled by accidents or events. Therefore, TPEG is a standard standard for showing traffic information and travel information. It is a system that transmits real-time traffic data through a DMB broadcasting network to a built-in navigation with a DMB receiver.

As shown in FIG. 1, in order to transmit traffic information to a vehicle through a DMB broadcasting network, traffic information of a current road is collected in real time and transmitted to a traffic information server, and the traffic information server transmits the DMB broadcasting network. Broadcast TPEG information through.

Various methods can be used to collect traffic information. For example, when a vehicle with a device collecting traffic information drives directly on a road and approaches a recognition device installed on a roadside facility such as a street lamp, the vehicle recognizes the point and uses the time passed between the point and the point. A method of determining the current road situation can be used. Alternatively, a method of determining current traffic information by collecting movement paths and time required of each traffic information collecting vehicle using GPS information installed in the traffic information collecting vehicle may be used.

The prior art collects traffic information by the above method and transmits TPEG information through the DMB broadcasting network.

However, the conventional traffic information collection method has a disadvantage in that it cannot grasp the current road situation in real time when it takes a long time to pass between the measuring point and the measuring point, such as in a severe congestion situation. In addition, in order to collect traffic data based on national highways and national roads, it is difficult to collect traffic information on a national level because it is necessary to install a recognition device on a road at a predetermined interval so that the transit time of the corresponding section can be determined. .

On the other hand, the method of collecting traffic information by collecting GPS information, it is difficult to distinguish between the upper and lower conditions of the elevated road in the case of overlapping roads such as overpass, and when a new road is newly created, the navigation map data of the collecting vehicle There is a disadvantage in that the operating cost is relatively high due to the problem of updating the service in advance and paying the communication cost to the main network operator.

Above all, in order to increase the accuracy of traffic information, the number of vehicles collecting traffic information must be greatly increased, which is uneconomical in terms of cost, and there is a concern that traffic jams may be increased for collecting traffic information.

The present invention has been conceived based on these points, and the problem to be solved by the present invention is that the traffic information of the surroundings can be obtained in real time by directly exchanging traffic flow information between the vehicles through wireless communication, so that the additional traffic information It is to provide a real-time traffic information sharing method between vehicles that do not need equipment for collection.

Another object of the present invention is to provide a method for sharing real-time traffic information between vehicles that does not require a separate traffic information server for collecting and transmitting real-time traffic information.

Another object of the present invention is to provide a method for sharing real-time traffic information between vehicles that can provide fast and accurate traffic information by collecting traffic information between adjoining adjacent vehicles in an ad hoc network. will be.

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

In order to solve this problem, the real-time traffic information sharing method between vehicles according to an embodiment of the present invention receives new traffic information including first and second traffic information of the plurality of areas divided into a plurality of areas from an adjacent vehicle. Correcting the stored traffic information stored in the own vehicle by reflecting the first traffic information of an area which is the same as or close to the area to which the own vehicle belongs among the received new traffic information; Replacing the stored traffic information stored at the corresponding position of the own vehicle with the second traffic information of the remote area outside the range of the step; and displaying the stored traffic information stored in the updated self vehicle on the screen of the display device. do.

A more detailed example of a method for sharing real-time traffic information between vehicles according to the present invention will be described later in the embodiments with reference to the drawings.

According to the present invention, since traffic information can be obtained in real time by exchanging traffic flow information with each other directly through wireless communication between vehicles, a separate equipment for collecting traffic information is unnecessary, and thus, for sharing traffic information It is possible to provide a real-time traffic information sharing method between vehicles that greatly reduces the cost.

In addition, a separate traffic information server for collecting and transmitting real-time traffic information is unnecessary, and a real-time traffic information sharing method can be provided between vehicles that can provide traffic information without using a DMB broadcasting network or a TPEG method.

In addition, it is possible to provide fast and accurate traffic information by collecting traffic information between adjoining adjacent vehicles in an ad-hoc network.

In addition, since traffic information between adjacent vehicles is relayed through each vehicle and rapidly propagated to a long distance, fast and accurate traffic information can be obtained even from a remote vehicle.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a view for explaining a traffic information providing method according to a conventional method.
2 is a flowchart illustrating a method for sharing real-time traffic information between vehicles according to an embodiment of the present invention.
3 and 4 are diagrams illustrating an exemplary road situation and a road segmenting method for explaining a method of sharing real-time traffic information between vehicles according to an embodiment of the present invention.
5 is a view for explaining a traffic information sharing relationship between vehicles in a partitioned area according to a method for sharing real-time traffic information between vehicles according to an embodiment of the present invention.
6 is a diagram illustrating exemplary traffic information data used in a method for sharing real-time traffic information between vehicles according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving the same will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 to 6. 2 is a flowchart illustrating a method of sharing real-time traffic information between vehicles according to an embodiment of the present invention, and FIGS. 3 and 4 are exemplary views illustrating a method of sharing real-time traffic information between vehicles according to an embodiment of the present invention. 5 is a view illustrating a road situation and a road partitioning method, and FIG. 5 is a view illustrating a traffic information sharing relationship between vehicles in a partitioned area according to a method for sharing real-time traffic information between vehicles according to an embodiment of the present invention. 6 is a diagram showing exemplary traffic information data used in the real-time traffic information sharing method between vehicles according to an embodiment of the present invention.

As shown in FIG. 2, a method for sharing real-time traffic information between vehicles according to an exemplary embodiment of the present invention is divided into a plurality of areas from adjacent vehicles and includes first and second traffic information of the plurality of areas. Receiving the traffic information (S110), and correcting the stored traffic information stored in the own vehicle by reflecting the first traffic information of the same or close to the area of the own vehicle of the received new traffic information (S120) And replacing the stored traffic information stored at the corresponding position of the own vehicle with the second traffic information of the remote area other than the predetermined range among the received new traffic information (S130), and storing the stored traffic information in the owned vehicle. And displaying the traffic information on the screen of the display device (S140).

In the real-time traffic information sharing method between vehicles according to the present embodiment, traffic information is shared by using a method of obtaining traffic information in real time in real time by exchanging traffic flow information of each other directly through wireless communication between vehicles.

As shown in FIG. 3, in order to obtain traffic information of a region where a large number of vehicles exist on a road crossing each other, as shown in FIG. 4, a region is divided into a plurality of regions by virtual lines crossing each other in the region.

In a method of dividing an area in which a road is formed into a plurality of areas, a line segment may be divided at a predetermined size, for example, 50 m horizontally and 50 m vertically, so that the plurality of areas may have the same size.

That is, the plurality of areas may be partitioned in a rectangular shape, and the width and width of one area of the plurality of areas may be partitioned wider than the width of the road on which the vehicle is driving. In dividing the area, if the width of the area is divided into narrower than the width of the road, the same vehicle traveling on the same road is recognized as belonging to the different area, which can reduce the reliability of traffic information. to be.

The plurality of regions are not necessarily partitioned in a rectangular shape, but may be partitioned into any other shape.

In addition, when a plurality of areas are partitioned, one of the plurality of areas may be partitioned to match a portion or intersection point of one road. That is, as shown in Figure 4, when the intersection center point is located in one area, the upper and lower left and right areas around the area to which the intersection center point belongs to be configured in the same form as the actual road, more accurate traffic information measurement This may be possible.

However, when dividing a plurality of areas, the method is not limited to the above method, and a method of collectively dividing a predetermined size without using the road information may be used.

In order to distinguish a plurality of partitioned regions, a region identifier may be assigned to each region, and the region identifier may be a latitude-longitude coordinate or a UTM (Universal Transverse Mercator) coordinate system, but is not limited thereto. Or an identification scheme may be used.

The latitude and longitude coordinates may be displayed using latitude and longitude of the upper left point of each region, but the reference point may be arbitrarily set at another point. For example, the latitude and longitude coordinates of the center point of Seoul are N37˚33'59 ”, E126˚58'40”. If the unit display is omitted and this is simply displayed as an area identifier of the corresponding area, it may be represented by N373359E1265840. As another example, the latitude and longitude coordinates of New York, USA are N40˚42'51 ”and W74˚00'21”, so the area identifier of New York is N404251W0740021, and the latitude and longitude coordinates of Sydney, Australia are S33˚52'08 ”, E151˚. Because it is 12'25 ”, Sydney's area identifier can be represented as S335208E1511225.

Alternatively, the plurality of regions may be partitioned according to the UTM coordinates, where the region identifiers by the UTM coordinates are the area information according to the UTM coordinates, the north distance from the reference point (in meters) and the east distance from the reference point (in meters). It may be represented as. For example, if the latitude and longitude coordinates indicate N37˚53'03 ”and E127˚46'59” in UTM coordinates, it would be N4142389 (m) and E0393732 (m) in the 52S zone. Therefore, the area identifier according to the UTM coordinate of the corresponding point may be represented as 52SN4142389E0393732.

On the other hand, in order to reduce the display unit, each coordinate in the UTM coordinates can be given using a value obtained by dividing the length of an area. For example, when the horizontal and vertical length of each area is set to 100 m, the area identifiers of the above coordinates are N41423 (100 m) and E03937 (100 m) in the 52S area, and the area identifier according to the UTM coordinates of the corresponding area is 52SN41423E03937. It can be given as.

As described above, various methods other than the above-described method may be used as the method of assigning the area identifier to the plurality of divided regions.

The traffic information is configured by calculating the speeds of the vehicles in the driving direction of the vehicle of each zone for each of the divided regions. Since only the speed information of the own vehicle is included before communicating with other adjacent vehicles, the speed information of the own vehicle is configured as traffic information of the area to which the vehicle belongs and is stored in a storage device, for example, a flash memory or an internal memory of a navigation device.

Therefore, before communicating with another neighboring vehicle through the network, only the traffic information of the area to which the own vehicle belongs is kept, and the traffic information of the other remaining areas is kept empty.

Subsequently, new traffic information, which is divided into a plurality of areas from the adjacent vehicle through the communication network and includes first and second traffic information of the plurality of areas, is received (S110).

As described above, the real-time traffic information sharing method between vehicles according to the present embodiment shares traffic information with each other through communication between adjacent vehicles through an Ad-Hoc network method, thereby allowing traffic in an area located at a far distance. Information can be obtained.

To this end, a wireless communication transmission / reception module may be installed in a navigation system provided in each vehicle, and may be configured to collect speed information of all vehicles by exchanging and receiving speed information of each vehicle.

The range of adjacent vehicles capable of receiving new traffic information may vary depending on the type of communication network.

The size of the entire plurality of regions is not limited and may be limited to only exchange traffic information of a portion of the region so as to prevent the data transmission amount between the vehicles from congesting.

For example, one area may be divided into a length of 100m in width and length, and the area may be configured in 256 widths and 256 lengths, and the entire area may be 25.6km in width and 25.6km in length.

As shown in FIG. 5, in this case, the self vehicle is set based on an area in which the own vehicle is located, and traffic information around 12.8 km radius can be shared in real time based on the own vehicle.

These figures are exemplary only, and the wireless network environment has been improved, increasing the allowable range of packets sent and received by neighboring vehicles along an Ad-Hoc network in peer-to-peer communication. In this case, the information of the whole wider area, for example, one area is divided into 100m horizontal and vertical length, the area is composed of 65535 horizontal, 65535 vertical, the traffic information in the range of 3277km radius based on the subject vehicle You can also share in real time.

As described above, new traffic information of an area within a predetermined range is received, wherein the new traffic information includes first traffic information, which is traffic information of an area that is the same as or close to the own vehicle, and second traffic information, which is traffic information of the remaining areas. It may include.

As shown in FIG. 5, assuming that an area to which the current vehicle belongs is A (3, 3), for example, the first traffic information is in a range B, that is, (2, 2), (2, 3), It may include traffic information in the range belonging to the areas (2, 4), (3, 2), (3, 4), (4, 2), (4, 3), and (4, 4). The traffic information may include traffic information of a range other than the remaining C range.

The classification criteria of the first traffic information and the second traffic information are not clear, and a person skilled in the art can appropriately select a range to distinguish the first traffic information from the second traffic information.

Such new traffic information may include information about the direction of travel of the vehicle and information about the speed of the vehicle. Since a vehicle can travel in both directions on one road except for an intersection or a one-way road, traffic information in a given area can be two or more, so it does not merely include information about the speed of the vehicle. It may include information on the direction of travel of the vehicle. That is, the new traffic information may include both traffic information in both directions of driving in opposite directions.

As shown in FIG. 6, the direction of the vehicle may be divided into a plurality of sections by a predetermined angle and displayed as identification keys of the corresponding sections, and the identification key may use a hexadecimal number. For example, as shown in FIG. 6, 360 degrees of 360 degrees may be divided by 22.5 degrees, and each segment may be divided into 16 sections, and each section may be provided with an identification key from 0 to F. FIG. In the illustrated example, since the vehicle is traveling in the direction corresponding to the identification key of A, the information about the vehicle traveling direction of the region to which the vehicle belongs may be represented by the identification key A or the identification key 2 which is the opposite direction. . When the roads are intersections orthogonal to each other, the identification key for the vehicle traveling direction of the area to which the vehicle belongs may have a value of 6 or E in addition to A, 2.

Similarly, the information on the speed of the vehicle may be divided into a plurality of sections according to the speed and displayed as an identification key of a hexadecimal number of the corresponding section. For example, if the speed of the vehicle is divided into 5 km / h, the vehicle speed of the corresponding area may be displayed as 0 when calculated in the range of 0 to 5 km / h, and the range of 5 to 10 km / h is 1 If the speed is calculated to be 75km / h or more, the identification key for the vehicle speed of the corresponding area may be displayed as F.

Therefore, the traffic information of any area included in the new traffic information received from the adjacent vehicle may be expressed in the form of repeating two hexadecimal digits or two hexadecimal digits. That is, when the traffic information of any region of the received new traffic information is AF, the driving direction of the vehicle is region A illustrated in FIG. 6, and the average speed of the region is 75 km / h or more.

In addition, when the traffic information of any region is displayed as two hexadecimal digits, for example, 6DE2, the driving direction of the vehicle in the arbitrary region is opposite to each other as shown in FIG. Section and E section, the vehicle speed toward the six section is 66 ~ 70km / h, the speed of the vehicle toward the section E can be seen that 11 ~ 15km / h, the arbitrary region according to the direction of travel of the vehicle It can be considered to be a general road rather than an intersection.

On the other hand, since the traffic information of the area where the intersection point of FIG. 4 belongs is a point at which two roads cross each other, two hexadecimal digits are four (for example, a reciprocating direction of a transverse road and a reciprocating direction of a longitudinal road). It may be indicated as AF206DE2.

Traffic information of the other area may be grasped based on the direction and speed information of each area included in the new traffic information received in such a form.

Subsequently, the stored traffic information stored in the own vehicle is corrected by reflecting the first traffic information, which is the traffic information in the same or near region of the received new traffic information.

As described above, when the first road driving does not have traffic information on an area other than the area to which it belongs, but it has stored traffic information on an area other than its area through a plurality of communication or updates, Since the traffic situation changes rapidly in real time, it is necessary to correct the existing stored traffic information by reflecting the newly received new traffic information.

A method of correcting storage traffic information will be described with reference to FIG. 5. The own vehicle belongs to the area A and has the storage traffic information of 25 areas in the (1, 1) to (5, 5) area, and the newly received new traffic information is the same as the traffic information of the 25 areas. Assume that it contains direction and velocity information. It is assumed that the own vehicle is running in the range A, and the first traffic information means traffic information of the area belonging to the range B.

If the stored traffic information stored in the own vehicle and the traffic information of the received new traffic information are the same, it is not necessary to correct the stored traffic information, but if it is different, it is necessary to correct the traffic information.

First, in the case where the speed information having the same direction information as the driving direction of the own vehicle is corrected among the traffic information of the area (3, 3), that is, the area to which the own vehicle belongs, the first speed information included in the new traffic information is added to the first speed information. A weighted value, a second weighted value to second speed information that is a current driving speed of the own vehicle, a third weighted value to the third speed information stored in the previously stored storage traffic information, and calculated an average value thereof. The correction value can be derived. The magnitudes of the first to third weights may be different from each other, and may give the highest weight to the first speed information, which is the newest and corrected number of times, and is derived with high precision, and the lowest to the oldest third speed information. Can be weighted.

That is, the newly calculated traffic information may be determined as the new storage traffic information by assigning different weights to the stored traffic information and the first traffic information, but may give a higher weight to the first traffic information than the existing traffic information. .

In addition, in the correcting of the stored traffic information, an additional weight may be assigned to the first traffic information of the area to which the adjacent vehicle that transmits the new traffic information among the first traffic information belongs. This is because, among all the traffic information, the traffic information on the area to which the own vehicle belongs can be evaluated with the highest reliability.

For example, when the own vehicle is located in the area (3, 3) in FIG. 5 and the adjacent vehicle that transmits the new traffic information is located in the area (3, 4), the received new traffic information is (3, 4). An additional weight may be assigned to give the highest reliability to the first traffic information of the region.

The calculation of such weights is merely exemplary and may be appropriately changed to fit the traffic situation and the vehicle data.

On the other hand, in the case of correcting a speed value having information in a direction opposite to the driving direction of the own vehicle among the traffic information of the region to which the vehicle belongs, it does not reflect the current traveling speed of the own vehicle because it is in the opposite direction to the own vehicle, and another calculation process is performed. Is the same as described above.

Subsequently, even when the speed value included in the traffic information of another area in the B range, that is, the area adjacent to the own vehicle, is corrected, the speed is corrected in the area where the own vehicle does not belong, so the current traveling speed of the own vehicle is not reflected. And other calculations are the same as described above.

As described above, the method of correcting or updating the stored traffic information stored in the own vehicle is exemplary, and an additional process may be added or changed for accurate correction without error, and thus, the own vehicle among the received new traffic information may be included. The stored traffic information may be updated more accurately by correcting the stored traffic information stored in the own vehicle by reflecting the first traffic information that is the traffic information of the same or near area.

Subsequently, the stored traffic information stored in the corresponding position of the own vehicle is replaced with the second traffic information of the remote area other than the predetermined range among the received new traffic information (S130).

The second traffic information representing traffic information belonging to the remote area is not determined in consideration of the first traffic information, which is information on the adjacent vehicle of the own vehicle, together with the stored traffic information already stored in the own vehicle, to determine the new traffic information. For example, first, data corresponding to the second traffic information is deleted among the stored traffic information of the own vehicle, and the second traffic information of the received new traffic information is stored as the new storage traffic information of the own vehicle.

For example, in FIG. 5, the region (1, 5) may be determined to be relatively far from the region (3, 3) where the vehicle is located.

Therefore, it is difficult to determine that the second traffic information of (1, 5) among the stored traffic information owned by the current vehicle is high in reliability, and new traffic information or self received directly from the vehicle in the area (1, 5). Compared to the vehicle, the traffic information of the vehicle located closer to the area (1, 5), for example, the vehicle located in the area (1, 4) or the area (2, 5) is more reliable. Can be.

Eventually, all vehicles will have synchronized storage traffic through the ad-hoc network, but this is only temporary data and traffic information on the road will change in real time, so considering the propagation speed of traffic information It may be determined that the traffic information of the area of the vehicle adjacent to the area is the most reliable traffic information.

Therefore, as described above, the stored traffic information stored at the corresponding position of the own vehicle is replaced with the second traffic information of the remote area other than the predetermined range among the received new traffic information. The predetermined range means a distance to a boundary for distinguishing the first traffic information and the second traffic information, which may vary according to road conditions.

Subsequently, the stored traffic information stored in the updated vehicle is displayed on the screen of the display device (S140). Displays updated storage traffic information on a display device, for example, a navigation screen or a display panel attached to the front dashboard of the vehicle so that the stored traffic information updated by the new traffic information can be effectively transmitted to the driver of the vehicle. . If there is previously displayed stored traffic information, the screen is updated based on the newly updated stored traffic information so that the vehicle driver can check the real-time traffic situation.

There is no limitation on the method of displaying the stored traffic information on the screen. For example, information about the driving direction and the speed of the vehicle in a predetermined area may be directly displayed on the road on the navigation map, and the vehicle driver may intuitively recognize the information. In order to do this, different colors or different symbols may be displayed according to the information on the speed of the vehicle.

Subsequently, referring again to FIG. 2, the method for sharing real-time traffic information between vehicles according to the present embodiment periodically broadcasts the stored traffic information stored in the own vehicle at a predetermined first time interval (S150). It may further include.

Since the new traffic information received from the adjacent vehicle eventually transmits the stored traffic information of the adjacent vehicle, the own vehicle having the updated storage traffic information through the new traffic information can provide new traffic information to other neighboring vehicles. The updated storage traffic information is periodically transmitted based on the first predetermined time interval.

The first time interval may be set, for example, 3 seconds or 5 seconds, but is not limited thereto and may be modified according to the amount of wireless data transmission and reception.

The periodically stored storage traffic information may be received by all vehicles located adjacent to each other within a predetermined range, and the transmitted traffic information may be opened without being encrypted so that all vehicles located within the street can utilize the storage traffic information. For example, a predetermined encryption and decryption process may be performed to transmit and receive only between traffic information transmission / reception modules added to a navigation device or the like.

As such, unlike the existing traffic information providing method, when the real-time traffic information sharing method between vehicles according to the present embodiment is used, the central server is not necessary, and the speed information of each vehicle is exchanged based on the short range communication of each vehicle. Can be. As described above, traffic information, that is, speed information of a remote area, is collected by using an ad hoc network method between neighboring vehicles, in which each vehicle contributes to an inter-vehicle relay role. Each vehicle has speed information according to a direction for each zone, and the average speed and vehicle density of the vehicle for each zone can be expressed using representative values on the navigation map screen.

However, as described above, if the range of traffic information transmitted and received between vehicles is continuously transmitted and received, for example, the entire traffic information of the area divided into 256 horizontally and 256 vertically, the total becomes 65536 areas, each Assuming that the vehicle can travel in four directions (four directions) on average, the data of traffic information represented by two hexadecimal digits is composed of four data, such as AF206DE2 in the above-described example. Therefore, since 4 bytes are required on average in expressing traffic information of one area, the minimum data amount of traffic information for the entire area is 262144 bytes (256 kB). If the range of traffic information transmitted and received is further extended, the amount of data may increase significantly.

Therefore, when such data is multi-transmitted and received in the form of N to N between all adjacent vehicles, data transmission may not be smooth due to high radio traffic.

In order to prevent such a data delay, when transmitting the stored storage traffic information periodically, traffic information transmission and reception between vehicles belonging to the same area may be limited.

For example, if the area to which the adjacent vehicle transmitting the traffic information belongs and the area to which the own vehicle receiving the traffic information belongs are the same and the traveling direction is the same, the transmission of the stored traffic information is stopped for a second predetermined time interval. can do.

That is, when the new traffic information is received from the adjacent vehicle, it may be assumed that other vehicles adjacent to the own vehicle also received the new traffic information from the adjacent vehicle, so that the duplicated data may not be transmitted again. The transmitting of the stored traffic information may be stopped during the same or another second time interval.

Like the first time interval, the second time interval may be set differently according to the type of traffic information or the circumstances of the road.

When the traffic information is periodically transmitted to the outside, information of the area to which the vehicle transmitting the traffic information belongs may be additionally transmitted, thereby determining that the own vehicle and the adjacent vehicle belong to the same area.

Such data transmission and reception restriction is merely exemplary, and for example, a specific group of vehicles may transmit and receive traffic information, while a vehicle belonging to a group other than the specific group may be configured to only receive traffic information. .

As a result, all the vehicles are in a state capable of receiving new traffic information transmitted within a certain range, but on the contrary, some transmissions may be restricted in order to prevent congestion of data volume when transmitting storage traffic information owned by the vehicle. have.

As described above, due to the method of sharing real-time traffic information between vehicles according to the present embodiment, traffic information may be obtained in real time by exchanging traffic flow information with each other directly through wireless communication between vehicles. No equipment is required, and thus, it is possible to provide a real-time traffic information sharing method between vehicles, which greatly reduces the cost for sharing traffic information.

In addition, a separate traffic information server for collecting and transmitting real-time traffic information is unnecessary, and a real-time traffic information sharing method can be provided between vehicles that can provide traffic information without using a DMB broadcasting network or TPEG method. Traffic information may be collected between adjoining vehicles in an ad-hoc network to provide fast and accurate traffic information.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and may be manufactured in various forms within the scope of the present invention, and the present invention Those skilled in the art will understand that it can be implemented in other specific forms without changing the technical spirit or essential features of the present invention, the embodiments described above are exemplary in all respects and limited It is not limited to form.

A: the area to which the vehicle belongs
B: the area adjacent to the own vehicle
C: owned vehicle and the remote area

Claims (17)

Receiving, from an adjacent vehicle, new traffic information divided into a plurality of areas and including first and second traffic information of the plurality of areas;
Correcting the stored traffic information stored in the own vehicle by reflecting the first traffic information of a region which is the same as or close to the region to which the own vehicle belongs among the received new traffic information;
Replacing stored traffic information stored at a corresponding position of the own vehicle with second traffic information of a remote area outside of a predetermined range among the received new traffic information;
And displaying the stored traffic information stored in the own vehicle on which the update is completed, on the screen of the display device.
Periodically transmitting the storage traffic information stored in the subject vehicle on the basis of the first predetermined time interval,
The periodically transmitting step,
And stopping transmission of the stored traffic information for a second predetermined time interval when the area to which the adjacent vehicle belongs and the area to which the own vehicle belongs are the same and the moving direction is the same. The method of claim 1,
The new traffic information is a real-time traffic information sharing method between vehicles including information on the direction of the vehicle and the speed of the vehicle. The method of claim 2,
The new traffic information is a real-time traffic information sharing method between vehicles including both traffic information in both directions running in opposite directions. The method of claim 2,
The information on the traveling direction is divided into a plurality of sections according to the direction is real-time traffic information sharing method between vehicles displayed by the identification key of the corresponding section. The method of claim 2,
The information on the speed of the vehicle is divided into a plurality of sections according to the speed is real-time traffic information sharing method between vehicles displayed by the identification key of the corresponding section. The method of claim 2,
Displaying on the screen,
Real-time traffic information sharing method between the vehicles showing the information on the speed of the vehicle on the road on the navigation map. The method according to claim 6,
Displaying on the screen,
Real-time traffic information sharing method between the vehicle to display in different colors according to the information on the speed of the vehicle. The method of claim 1,
Wherein the correcting comprises:
The newly calculated traffic information is determined as the stored traffic information by giving different weights to the stored traffic information and the first traffic information.
Real-time traffic information sharing method between the vehicle to give a higher weight to the first traffic information than the stored traffic information. 9. The method of claim 8,
Wherein the correcting comprises:
And real-time traffic information sharing method for determining the stored traffic information by correcting the stored traffic information in the same area as the own vehicle. 9. The method of claim 8,
Wherein the correcting comprises:
The real-time traffic information sharing method between the vehicles to give additional weight to the first traffic information of the area of the first vehicle of the first traffic information. delete delete The method of claim 1,
The storage traffic information is periodically transmitted is a real-time traffic information sharing method between vehicles that can be received by all adjacent vehicles. The method of claim 1,
The plurality of areas are partitioned in a rectangular shape, the width of the width and length of one of the plurality of areas of the real-time traffic information sharing method between the vehicles is partitioned wider than the width of the road on which the vehicle is driving. The method of claim 1,
The real-time traffic information sharing method between vehicles in which one area of the plurality of areas matches a portion or intersection point of one road. The method of claim 1,
The plurality of areas are real-time traffic information sharing method between vehicles are partitioned according to the UTM coordinates or latitude or longitude coordinates. The method of claim 1,
Before the step of receiving the new traffic information,
The real-time traffic information sharing method between the vehicle further comprising the step of configuring the speed information of the own vehicle to the stored traffic information of the area to which the own vehicle belongs.

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