KR102060985B1 - Apparatus and method for transmitting road traffic sign information through language independent gdd - Google Patents

Abstract

The present invention transmits the road traffic sign information to a vehicle including an autonomous vehicle driving on the road by visible light communication method including LiFi using GDD that defines the information related to the road traffic sign, thereby quickly and accurately recognizing the road situation in front. The present invention relates to an apparatus and method for transmitting road traffic sign information through a language independent GDD.

Description

Apparatus and method for transmitting road traffic sign information through language-independent GDD {APPARATUS AND METHOD FOR TRANSMITTING ROAD TRAFFIC SIGN INFORMATION THROUGH LANGUAGE INDEPENDENT GDD}

The present invention relates to an apparatus and method for transmitting road traffic sign information through language-independent GDD. More particularly, the present invention relates to a graphic data dictionary (GDD) in which information related to traffic sign is defined as graphic data. The present invention relates to a road traffic sign information transmitting device and a method for transmitting road traffic sign information to a vehicle including an autonomous vehicle driving on a road so as to quickly and accurately recognize a road situation in front of the road.

In autonomous vehicles as well as in general vehicles, the effective communication of road traffic sign information can prevent accidents when the car is traveling on the road, and play a great role in reducing traffic jams by smoothing the flow of vehicles.

It is very important to standardize the information of these road traffic signs and to recognize them worldwide. Therefore, the Graphic Data Dictionary (GDD), which defines information related to traffic signs as graphic data, is standardized.

In addition, LiFi (Light Fidelity) is a communication technology using light, and a technology that transmits and receives data between light bulbs and smart devices by loading information on the light. In addition, LiFi is a communication method using visible light, unlike WiFi, which is a communication standard using wireless radio waves, and is a principle of transmitting data to visible light by attaching a chip to LED lighting, rather than transmitting data using conventional electromagnetic waves.

That is, the LiFi technology is a type of Visible Light Communication (VLC) that transmits information by using the wavelength of light emitted from the LED, and can be used wherever there is light, and is harmless to the human body, It has various advantages such as low cost, high speed communication, stability, and security, and it has the advantage of free of charge for the use of license-free band.

In particular, with the development and high performance of LED technology, LiFi is spreading to various devices in the vehicle such as LED headlight lamps and signal lamps. Accordingly, technical conditions for applying LiFi technology to vehicles are being created.

On the other hand, the driver checks the road signs in front of the road, signs of traffic restrictions or prohibitions, and instructions on the roads currently in use through various road traffic signs. However, in order to recognize road traffic signs, autonomous vehicles must recognize the graphic information of road traffic signs and match them with GDD to recognize the information. However, such road traffic environment is not provided yet. Therefore, the road traffic sign information transmission device through language-independent GDD is very necessary for the popularization of autonomous vehicles.

The road traffic signs are cross signs, T-shaped intersections, left junctions, double bent roads, slippery roads, uneven road signs, warning signs, no traffic, no entry, no straight ahead, U-turns. There are various kinds of signs such as regulatory signs, which are signs that prohibit or restrict traffic such as prohibition and suspension, and indicators, which are signs for motorways, one-way streets, child protection, and bus lanes.

In this way, the driver of the vehicle visually checks the graphic information of the road traffic sign installed at the upper part of the road or on the side of the road while driving, but the navigation device or the autonomous vehicle of a general vehicle recognizes the graphic information of the road traffic sign as an image and makes a road ahead. Check the situation and move to the destination using the confirmed road traffic sign information.

However, the conventional road traffic signs as described above allow the motorist or autonomous vehicle to check the road situation based on the recognition of the graphic information displayed on the road traffic signs. There may be a case, in which case there was a problem that the safety operation to the destination occurs. In particular, the conventional road traffic signs have no difficulty in recognizing the graphic information during the day, but it is difficult to accurately recognize the graphic information of the road traffic signs when the clock is not good due to bad weather such as fog, rain, and snow. If it is not secured, there was a problem that the graphic information of the road traffic sign could not be recognized at all.

Therefore, in order to prevent motorists or autonomous vehicles from recognizing the information on the road traffic signs due to bad weather or visual limitations, or not immediately knowing what the road traffic signs mean. In this situation, it is necessary to introduce a technology for providing road traffic sign information to a driving car, displaying the road traffic sign information on a navigation device, or guiding it with a voice signal.

Therefore, in the present invention, the road traffic sign is defined as graphic data and the information of the road traffic sign is transmitted to the vehicle including the autonomous vehicle driving on the road based on the preconfigured GDD. This paper proposes a way to recognize the road situation quickly and accurately to carry out safe driving.

Particularly, in the present invention, at least one LED is disposed on the graphic part of the road traffic sign or the graphic part of the road traffic sign is implemented by an LED or LCD display board and the road traffic sign information through a light source in a vehicle including an autonomous vehicle. To propose a method to transmit the.

Next, the prior art existing in the technical field of the present invention will be briefly described, and then the technical matters to be made differently from the prior art will be described.

First, Korean Laid-Open Patent No. 2016-0096972 (2016.08.17.) Relates to a method for transmitting traffic sign information, and includes a sign ID, a sign purpose, a sign type, a sign location, a sign information, and a sign image information of a traffic sign. Storing the traffic sign information in advance, configuring the stored traffic sign information into a data packet comprising a header and a payload, modulating the data packet into an RF signal, and converting the modulated RF signal into And transmitting to the receiving system by near field communication.

Unlike the present invention, the transmission process of the radio signal is complicated by receiving and encoding the use, type, location, sign image information, etc. of the sign for each road traffic sign, and thus, the radio signal is received. The decoding process in the vehicle is also complicated, and in the case of RF communication, the communication speed is slow, and there is a limit to accurately and quickly conveying the information of the sign to a fast moving car, and in case of radio interference, it is impossible to perform accurate signal transmission. do. That is, the prior art encodes the data matched with a unique code for a specific road traffic sign information based on the GDD defined by listing the graphic image of the road traffic sign in the road traffic sign proposed by the present invention with a specific code, and encoding Since the technical configuration of transmitting the data to a driving vehicle through LiFi communication technology is not presented, the technical configuration difference between the two is clear.

In addition, Korean Laid-Open Patent Publication No. 1998-0048394 (1998.09.15.) Relates to a road sign for transmitting traffic information and a receiving vehicle, and continuously transmits the corresponding traffic information in a frequency form through a transmitting device. Vehicles driving near the area receive it through the receiving device and play it back with voice information so that the traffic information can be continuously delivered to the driver while driving. It is characterized by enabling it.

However, the prior art only refers to the configuration of providing the information on the road sign in the form of frequency in the form of frequency, and based on the GDD which lists the graphic image of the road traffic sign proposed in the present invention and defines it as a specific code. There is no description of a configuration for encoding data matched with a unique code for specific road traffic sign information, and for transmitting the encoded data to a driving vehicle through LiFi communication technology.

That is, although the prior arts suggest a configuration for transmitting sign information wirelessly to a vehicle, the configuration and encoding data for encoding road traffic sign information using a GDD defining a road traffic sign as graphic data, which is a technical feature of the present invention. Is transmitted to a vehicle including autonomous vehicles quickly and accurately through the LiFi communication method without placing it on the radio interference, at least one LED is placed on the graphic part of the road traffic sign, or the graphic part of the road traffic sign is led, The technical difference is obvious because there is no specific description about the configuration of transmitting the road traffic sign information through the light source by implementing the display board such as LCD.

The present invention was created to solve the above problems, and an object of the present invention is to provide road traffic sign information using GDD which defines road traffic signs as graphic data and pre-configures them.

Another object of the present invention is to provide a signal in which road traffic sign information is coded to a vehicle including an autonomous vehicle driving on a road in a state in which road traffic signs are installed at each location of a road based on GDD.

In another aspect, the present invention is to provide at least one LED on the graphic portion of the road traffic sign or to provide the road traffic sign information to the vehicle, including autonomous vehicles using the light source, such as LED, LCD on the graphic part of the road traffic sign Another purpose.

In addition, the present invention is to provide road traffic sign information with a wireless signal to minimize the confusion caused by misrecognition or unrecognition of the road traffic sign because the visibility is not secured in a vehicle including an autonomous vehicle driving on the road For another purpose.

In addition, the present invention by minimizing the situation that the vehicle can not recognize by duplexing and transmitting the road traffic sign signal visible road traffic sign itself, the coded signal of the road traffic sign through a combination of visible and invisible communication For another purpose.

Road traffic sign information transmission apparatus according to an embodiment of the present invention, the road traffic sign and the road traffic sign for providing traffic information of the road to a car installed on the periphery of the road to operate the road appears, defined in advance And a road traffic sign code generation unit for generating encoded information on the road traffic sign, wherein the information on the road traffic sign is defined based on GDD.

In addition, the information on the generated road traffic sign is characterized in that it is transmitted wirelessly through the optical camera communication (OCC).

In addition, the information on the road traffic sign is characterized in that the modulated to be transmitted to a radio signal through a transmitter disposed at least one or more graphics portion of the road traffic sign.

The transmitter may include at least one LED, and the information on the road traffic sign may be modulated and transmitted as a radio signal according to a blinking operation of the LED on the graphic portion of the road traffic sign.

In addition, the transmitting unit is an electronic signboard consisting of an LED or LCD display on the road traffic sign, the information on the road traffic sign is modulated into a radio signal according to the flashing operation on the graphic portion of the road traffic sign displayed on the sign and transmitted It is characterized by.

In addition, the road traffic sign information transmission method according to an embodiment of the present invention, the step of providing the traffic information of the road to the car driving the road through the road traffic sign installed on the road and the road traffic sign code generation And a road traffic sign code generation step of generating encoded information about the road traffic sign previously defined through the unit, wherein the information on the road traffic sign is defined based on GDD.

In addition, the information on the generated road traffic sign is characterized in that it is transmitted wirelessly through the OCC.

In addition, the information on the road traffic sign is characterized in that the modulated to be transmitted to a radio signal through a transmitter disposed at least one or more graphics portion of the road traffic sign.

In addition, the information on the road traffic sign is characterized in that it is modulated and transmitted as a radio signal in accordance with the flashing operation of the LED for the graphic portion of the road traffic sign through the transmission unit including at least one or more LED.

In addition, the information on the road traffic sign is characterized in that it is modulated and transmitted as a radio signal in accordance with the flashing operation for the graphic portion of the road traffic sign displayed on the sign via the transmission unit consisting of a sign.

As described above, according to the apparatus for transmitting road traffic sign information and the method thereof, the road traffic sign is defined as graphic data, and the road traffic signs are installed at each position of the road based on the preconfigured GDD. By transmitting road traffic sign information to a vehicle including a self-driving vehicle that drives the road through visible light communication method including LiFi, it is possible to quickly and accurately recognize the road situation in front of the driving, thus allowing not only the driver of a general vehicle but also autonomy. There is an effect that can drive the safe driving of the vehicle.

In addition, by arranging at least one LED on the graphic part of the road traffic sign or by implementing the graphic part of the road traffic sign by LED and LCD, and transmitting the road traffic sign information through the light source, it is autonomous regardless of day or night. In a car including a driving vehicle, the information of the road traffic sign can be accurately recognized.

In addition, in the case of cars including autonomous vehicles, the information on the road traffic signs is transmitted as a wireless signal in preparation for not being visually well recognized, thereby minimizing the occurrence of confusion due to misrecognition or unrecognition of the road traffic signs. It can work.

In addition, by duplexing and transmitting the road traffic sign signal through the visible road traffic sign itself and the coded signal of the road traffic sign through a combination of visual communication and invisible communication, a situation that the vehicle cannot recognize can be minimized.

1 is a diagram schematically showing the configuration of a road traffic sign information transmitting apparatus according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a process of transmitting and receiving road traffic sign information to which the present invention is applied.
Figure 3 is an exemplary view showing the configuration of the appearance of the road traffic sign to which the present invention is applied.
4 is a diagram showing in detail the configuration of the road traffic sign information transmitter according to an embodiment of the present invention.
5 is a diagram showing an example of road direction indications defined in GDD used in the present invention.
6 is a flowchart illustrating in detail a process of transmitting road traffic sign information according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the apparatus and method for transmitting road traffic sign information via GDD independent of the language of the present invention. Like reference numerals in the drawings denote like elements. In addition, specific structural to functional descriptions of the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the present invention, and unless otherwise defined, all terms used herein including technical or scientific terms These have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. It is preferable not to.

1 is a diagram schematically showing the configuration of a road traffic sign information transmitting apparatus according to an embodiment of the present invention.

The present invention defines a road traffic sign of a road traffic sign that is installed in the vicinity of a road and provides traffic information of a corresponding road to a car operating a road using graphic data that is configured in advance and uses the road traffic defined by the GDD. By converting the information about the sign into a radio signal and transmitting it to a car including an autonomous vehicle driving around, it helps to minimize the confusion caused by the misrecognition or unrecognition of the road traffic sign.

As shown in FIG. 1, the road traffic sign includes road traffic sign information according to GDD and includes a road traffic sign information transmitter 100 for transmitting a signal encoded therein. The transmitted road traffic sign information is received by the road traffic sign information receiver 200. In addition, the road traffic marking information transmitter 100 and the road traffic marking information receiver 200 are connected to a wireless network for a vehicle, and the road traffic marking information transmitter is installed on each vehicle by wireless communication. Can be sent. In 5G, automotive wireless networks support low-latency, high-reliability network slices to support services for connected cars as a use case. In addition, the road traffic sign is connected to the road traffic sign information control server 300 and a wired or wireless network, so that it is possible to update and manage GDD information and road traffic information.

In addition, the road traffic sign information transmitter 100 may provide road traffic sign information by itself to a vehicle including an autonomous vehicle equipped with a road traffic sign information receiver, but the code information of the GDD is a visible communication means of LiFi, VLC. It is also possible to transmit by OCC or the like or by means of infrared, ultrasonic or wireless communication (5G, etc.) means which are invisible communication means.

If an error occurs in transmitting the road traffic sign information, which leads to a large accident, the present invention further includes a technical feature of duplexing and transmitting to the communication means.

2 is a conceptual diagram illustrating a process of transmitting and receiving road traffic sign information to which the present invention is applied.

As shown in FIG. 2, the present invention converts information about a road traffic sign into a wireless signal based on GDD defined as a unique code for graphic information displayed on the road traffic sign, and then converts the GDD data into a wireless signal. Recognizing information on the road traffic sign by receiving the vehicle from the vehicle, and the general driver or autonomous vehicle that has confirmed the road situation ahead through the information on the recognized road traffic sign can perform safe driving and high speed driving. will be.

For example, the present invention arranges at least one or more LEDs along the periphery of the graphic portion of the road traffic sign (ie, cross-shaped intersections, T-shaped intersections, straight lines, etc.) as shown in FIG. 2, and displays the light emitted from the LEDs. The road traffic sign information can be transmitted to a vehicle including an autonomous vehicle.

In addition, although the present invention is not shown in the drawings, the road traffic sign may be implemented as an electronic board using an LED and an LCD display. In this case, the present invention may display the graphic portion of the road traffic sign on the electronic signboard, and transmit the road traffic sign information to a vehicle including an autonomous vehicle through the light of the graphic part displayed on the electronic signboard.

Then, in a car including an autonomous vehicle, the camera detects the blinking of LEDs arranged along the edge of the graphic part of the road traffic sign or the light of the graphic part of the road traffic sign displayed on the signboard with the camera. You can check whether the information is about the cover page. Of course, when the car does not recognize the information on the road traffic sign by the image recognition method by detecting the light emitted from the LED or the light displayed on the signboard with a camera, and by recognizing the GDD data included in the light You can check information about road traffic signs.

To this end, the present invention proposes to add an LED-based road traffic sign information transmitter 100 applying a visible light communication method including LiFi / OCC / VLC to an existing road traffic sign, or to provide a new production. The road traffic sign information transmitter 100 periodically transmits information on the road traffic sign to a vehicle running around by using LED light.

In addition, the road traffic sign information receiver 200 provided in a vehicle including an autonomous vehicle receives the information on the road traffic sign transmitted using the LED light from the road traffic sign information transmitter 100 to the road traffic sign. Recognize information on the road, and make sure that the general vehicle driver or autonomous vehicle checks the road ahead based on the recognized road traffic sign. That is, the road traffic sign information receiver 200 includes an OCC camera, receives the visible light signal transmitted from the road traffic sign information transmitter 100 through the OCC camera, decodes it, and appears on the road traffic sign. Check GDD data defined with unique code for graphic information. As such, when GDD data is acquired by the road traffic sign information receiver 200, it is possible to recognize what road traffic sign information is based on the information defined in the GDD data.

At this time, the present invention has been described by using a visible light communication method including LiFi / OCC / VLC when transmitting the information on the road traffic sign on the road traffic sign as a wireless signal as an example, but is not limited thereto. Any type of communication method may be used. For example, in the process of periodically transmitting the information on the road traffic sign through the LiFi / OCC / VLC in the road traffic sign information transmitter 100 provided on the road traffic sign, if there is bad weather or surroundings such as fog, rain, snow In case that the information on the road traffic sign is not accurately transmitted by the car, the information on the road traffic sign can be transmitted by simultaneously using or replacing a broadband communication network such as LTE / WiFi. That is, the present invention can be used in combination or selectively used to transmit the information on the road traffic sign through LiFi and the method through the broadband communication network according to the use environment. In addition, ultrasonic or infrared communication is possible as an invisible communication means.

Meanwhile, the road traffic sign information transmitter 100 encodes the road traffic sign displayed on the road traffic sign as graphic data, and then converts the information on the encoded road traffic sign into a LiFi / OCC / VLC signal. Transmit it and send it to the car driving around by LED. In other words, the OCC transmits the information on the road traffic sign wirelessly to nearby cars. The OCC is a form of optical communication that uses omni-directional visible light, infrared light or ultraviolet light for signal transmission.

In this case, the road traffic sign information transmitter 100 uses the most commonly known on-off keying method when wirelessly transmitting information on the road traffic sign encoded based on a predefined GDD as graphic data through OCC. Can be processed simply. Here, of course, various known methods may be applied in addition to the on-off keying method.

As described above, when the information on the road traffic sign is transmitted to LiFi through the LED of the present invention, the communication speed, which is a problem in the conventional RF communication, is slow and does not transfer the information of the sign to the fast moving car accurately and quickly. As a result, the driver of the general vehicle as well as the autonomous vehicle can safely and perform high speed driving.

In addition, the road traffic sign information transmitter 100 may be installed in two types, and the road traffic sign information transmitter having two types of OCC signals (ie, information on road traffic signs) converted based on GDD data may be installed. The vehicle 100 is transmitted to a general car and an autonomous vehicle traveling around the vehicle 100.

One installation method is to install the LED-based road traffic sign information transmitter 100 on the existing road traffic sign. This is the simplest way to install, has the advantage of being applied to all existing road traffic signs, and can reduce the cost of building the system. The difference from the existing road traffic signs is that only the encoded data is transmitted wirelessly from the road traffic signs.

Another installation method is somewhat complicated compared to the above method. Each road traffic sign is made of LED parts. The advantage of this type is that the newly designed road traffic signs are more visually improved for both driver and autonomous vehicles than the existing road traffic signs. In addition, a newly designed road traffic sign made of LEDs transmits specially encoded GDD data. Therefore, the information on a particular road traffic sign can be easily checked on the basis of the recognition of the GDD data received from the road traffic sign information through the road traffic sign information receiver 200 in a vehicle and an autonomous vehicle of a general driver traveling around.

Meanwhile, the road traffic sign information receiver 200 may be added or newly manufactured and installed in an existing camera system provided in a vehicle, and transmitted from the OCC camera including an image sensor and the road traffic sign information transmitter 100. It includes a decoding unit for decoding a signal. That is, the road traffic sign information transmitter 100 detects the information on the road traffic sign transmitted wirelessly through the OCC in the image sensor provided in the OCC camera, and decodes it through the decoding unit to check the GDD data, road traffic It is to correctly recognize the information on the signs.

In addition, the road traffic sign information receiver 200 receives a radio signal transmitted from the road traffic sign information transmitter 100 of the road traffic sign to recognize the GDD information, and the information on the recognized road traffic sign to the car Output to the provided navigation or display device for the vehicle driver to confirm. In this case, the information on the road traffic sign may be provided as voice information in addition to visual information.

In addition, the road traffic sign information receiver 200 provides information on the recognized road traffic signs to the central processing unit that manages the operation of the vehicle when the car is an autonomous vehicle, and maintains an accurate path based on the automatic control of the vehicle. And safe driving in accordance with road regulations.

Figure 3 is an exemplary view showing the configuration of the appearance of the road traffic sign to which the present invention is applied.

As shown in FIG. 3, the road traffic sign according to the present invention may transmit road traffic sign information by attaching a light source including an LED to one side of the road traffic sign as shown in FIG. As shown in (b), part of the LED is installed along the contour of the road traffic sign to provide visual information, and at the same time, the GDD code information can be transmitted through the blinking of the LED. In addition, it is possible to increase the visibility by arranging the LED along the periphery of the road traffic sign as shown in (c) of FIG. 3, and can also increase the direct visibility of the road traffic sign by installing the LED along the road traffic sign. At this time, the LED installed along the border or road traffic sign may be configured to blink to convey the code information of the GDD, or may provide additional information by turning on the light from left to right, from top to bottom, or vice versa. . In addition, as shown in (d) of FIG. 3, LEDs may be arranged on road traffic signs to provide variable road traffic sign information.

On the other hand, LEDs, LCDs, etc. installed on road traffic signs contain color information, which can be used to transmit additional information using color or to define a richer signal for users including motorists or passengers in autonomous vehicles. Can be.

4 is a diagram showing in detail the configuration of the road traffic sign information transmitter according to an embodiment of the present invention. 5 is a diagram showing an example of road direction indications defined in GDD used in the present invention.

As shown in FIG. 4, the road traffic marking information transmitter 100 includes a power supply unit 110, a storage unit 120, a road traffic marking code generation unit 130, a road traffic marking information transmitting unit 140, and a controller ( 150 and the wired / wireless communication unit 160.

The power supply unit 110 converts AC power of 110V / 220V applied from the outside into DC power used in the road traffic sign information transmitter 100 (for example, 5V, 12V, etc.), and configures the corresponding power. Perform the function to feed the part. That is, it may include an SMPS function.

In addition, when the solar cell is installed on the road traffic sign, the power supply unit 110 may generate and use its own power without receiving power from the outside. In addition, a portable battery may be used.

The storage unit 120 stores various operation programs used to wirelessly transmit the information about the road traffic signs to the surrounding cars in the road traffic signs, and defines the road traffic signs as graphic data and configures them in advance. Store and manage information.

In this case, as shown in FIG. 5, the GDD information stored in the storage unit 120 includes graphic parts such as straight, straight and left turns, straight and right turns, and unique code values determined according to the graphic parts. And the like, and includes specific GDD information according to the road traffic sign. In addition, the GDD information may include the specific section information of the road that the road traffic sign affects, the starting point, the length, the ending point of the road for the specific section information, or a combination thereof.

In addition, when the road traffic sign is changed, the storage unit 120 may receive and update new GDD information from a server managing the road traffic sign through a dedicated line, or may be directly updated by a field manager.

Meanwhile, the GDD information stored in the storage unit 120 may be information defining information on all kinds of road traffic signs, not information defined on any one road traffic sign. For example, if a road traffic sign is composed of an electric signboard and can be displayed in various graphics according to the change of installation place, road conditions, etc., the GDD information including graphic information and code values for each road traffic sign is operated around. This is to allow the transmission to the car.

Here, the GDD information may be stored in the memory by receiving the updated information periodically or aperiodically (every time an update occurs) through the wired / wireless network from the GDD information management server including the road traffic sign information control server 300.

The road traffic sign code generation unit 130 extracts GDD information on the road traffic sign from the storage unit 120 to generate encoded information on the road traffic sign, and converts the information on the encoded road traffic sign into the road. Output to the traffic sign information transmitter 140.

The road traffic sign information transmitting unit 140 converts the information on the road traffic sign encoded by the road traffic sign code generation unit 130 into a wireless signal and transmits the information to the vehicle passing the road traffic sign.

That is, the road traffic sign information transmitting unit 140 may receive and recognize the GDD information defining a graphic portion of the road traffic sign in a vehicle including an autonomous vehicle located in front of the road traffic sign. The information on the road traffic sign encoded at 130 is modulated in the OCC format and transmitted through the LED light source.

In this case, the road traffic sign information transmitting unit 140 may be configured in two forms to modulate and transmit information on the road traffic sign into an LED-based optical signal.

First, the road traffic sign information transmitter 140 arranges at least one or more LEDs along the outer edge of the graphic portion of the road traffic sign as shown in FIG. 2, and blinks (ie, on-off keying) of each LED. Based on the modulated information on the road traffic sign encoded by the road traffic sign code generation unit 130 is transmitted by modulating a visible signal.

In addition, the road traffic sign information transmitter 140 may configure the road traffic sign as a light source including an LED or an LCD display, in addition to a method of arranging LEDs along the outer edge of the graphic portion of the road traffic sign. In this case, the road traffic sign information transmitting unit 140 may convert the information on the road traffic sign encoded by the road traffic sign code generation unit 130 based on a blinking operation of the graphic portion of the road traffic sign displayed by the light source. Modulate and transmit a visible signal.

In particular, the road traffic sign information transmitting unit 140 includes communication means such as LiFi / OCC / VLC as visible light communication, and includes invisible communication means such as wireless communication means such as WiFi, LTE and infrared, ultrasonic communication.

The controller 150 collectively controls various functions performed by the road traffic sign information transmitter 100, controls the operation power conversion and supply of the power supply unit 110, and controls the storage unit 120 in the storage unit 120. Various operation programs and road traffic signs used for the transmission of information on road traffic signs are defined as graphic data, and the storage and update management of the GDD information which pre-configured them are controlled.

In addition, the control unit 150 controls the GDD data encoding for the road traffic sign in the road traffic sign code generation unit 130, the information on the road traffic sign in the road traffic sign information transmitter 140 Controls the modulation and transmission of visible signals.

Meanwhile, the controller 150 determines whether to transmit the road traffic sign code to the road traffic mark information transmitter 140, the wireless communication unit of the wired / wireless communication unit 160, or a combination thereof. For example, if there is a need to transmit an important and urgent signal that requires the redundancy, it is necessary to transmit the visible and invisible signals in duplicate. If the traffic situation is changed or an emergency situation occurs, the control unit may receive a command from the road traffic sign information control server 300 and transmit the road traffic sign code to wireless communication such as WiFi and LTE.

In this way, the control unit 150 controls the priority to be set according to the type of road traffic sign information and the place where the road traffic sign is installed, so that the means for transmitting a signal can be duplicated or tripled. That is, the controller 150 transmits the road traffic sign information through a mechanism for determining the importance and priority of the road traffic sign information, and determining and transmitting the transmission means such as single / double / triple. Here, the single transmission means transmits using only one of visible light communication, wireless communication, infrared ray, and ultrasonic communication, and the double means is a structure that further uses one of wireless communication, infrared ray, and ultrasonic communication in the state of using visible light communication. It is a structure that uses at least three or more of the communication means listed above at the same time. When using a plurality of communication means at the same time, the road traffic sign information is applied to the urgent or important information, it is possible to reduce the error.

The wire / wireless communication unit 160 may receive a command from the road traffic sign information control server 300 through wireless communication such as LTE or wired communication (Internet, etc.), and may transmit the road traffic sign code. The wireless communication function required by the road traffic sign information transmitting unit 140 and the wireless communication function of the wire / wireless communication unit 160 may exist only in any one of them.

On the other hand, the road traffic sign is provided with a communication (serial) port (not shown) for controlling the operation of the road traffic sign information transmitter on the spot, and a user interface for simply setting the operating conditions of the road traffic sign information transmitter ( Not shown). The user interface may include a control panel or a computer keyboard interface.

Hereinafter, an embodiment of the road traffic sign information transmission method according to the present invention configured as described above will be described in detail with reference to FIG. At this time, each step according to the method of the present invention can be changed in order by the environment or those skilled in the art.

6 is a flowchart illustrating in detail a process of transmitting road traffic sign information according to an embodiment of the present invention.

First, the road traffic sign information transmitter 100 provided in the road traffic sign is provided in the state in which the road traffic sign installed in the periphery of the road is stored in the form of graphic data by defining the road traffic sign as graphic data. It loads the setting information for transmitting the information on the traffic sign to the vehicle including the autonomous driving vehicle running around (S100).

If there is a change in the setting information (S200), and if it is determined that there is a change, the latest setting information is loaded and used.

If there is no change to the setting information for the road traffic sign as a result of the step S200, in order to transmit the road traffic sign information by car including an autonomous vehicle driving around, the road traffic sign information transmitter 100 Using the setting information, the GDD data defined for the graphic displayed on the road traffic sign is extracted from the storage unit 120 and then the GDD information is encoded (S300). That is, the encoding of GDD data defined with unique graphic information and code values for a particular road traffic sign.

Thereafter, the road traffic sign information transmitter 100 modulates the GDD data for the specific road traffic sign encoded through the step S300 into a visible or invisible signal (S400), and includes a self-driving vehicle that is running around. Transmit (S500). For example, by using the light emitted from the LED placed along the edge of the graphic part of the road traffic sign, or using the light of the graphic part of the road traffic sign displayed on the electric sign when the road traffic sign is implemented as an electric sign. Traffic sign information is transmitted to automobiles including autonomous vehicles.

In step S400, the road traffic sign information transmitter 100 modulates GDD data for a specific road traffic sign into a visible and invisible signal, and then controls the control unit 150 to display visible, invisible, or a combination thereof. (Light source flashing, wireless communication, infrared, ultrasonic, etc.) (S500), the LED is arranged along the outer periphery of the graphical portion of the road traffic sign information in the road traffic sign information receiver 200 provided in the car including autonomous vehicles The GDD data is checked by receiving and decoding the light of the graphic part of the road traffic sign displayed on the electronic sign or flashing on, and checks the road traffic sign by matching the GDD data with previously stored GDD data.

That is, the information on a specific road traffic sign received and confirmed from the road traffic sign information transmitter 100 is displayed on a navigation screen or output as a voice signal through a speaker to be checked by a general vehicle driver or in case of an autonomous vehicle. By providing information on the signs to the central processing unit that manages the operation of the vehicle, it is possible to quickly and accurately check the road situation in front of the vehicle, thereby helping to maintain the route and to carry out safe operation in accordance with the road regulations.

Meanwhile, the road traffic sign information transmitter 100 continuously encodes GDD data and wirelessly transmits the LEDs in order to prevent a vehicle that rapidly passes the road traffic sign from receiving information on the road traffic sign wirelessly. It can be done with

As described above, the present invention is based on the GDD defining the information related to the road traffic signs, road traffic signs installed in each position of the road in the state of road traffic traffic in the visible light communication method including LiFi in a vehicle including a self-driving vehicle running on the road By transmitting the sign information, it is possible to quickly and accurately recognize the road situation in front, thereby enabling the safe driving of autonomous vehicles as well as drivers of general vehicles.

In addition, by arranging at least one LED on the graphic part of the road traffic sign or by implementing the graphic part of the road traffic sign by LED and LCD, and transmitting the road traffic sign information through the light source, it is autonomous regardless of day or night. It is possible to accurately recognize the information of road traffic signs in a car including a driving vehicle.

In addition, the information of the road traffic sign is transmitted in a radio signal in preparation for the information of the road traffic sign not being visually recognized, thereby minimizing the occurrence of confusion due to misrecognition or inability to recognize the road traffic sign.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is merely exemplary, and those skilled in the art to which the art belongs, various modifications and equivalent other embodiments therefrom I understand that it is possible. Therefore, the technical protection scope of the present invention will be determined by the claims below.

100: road traffic sign information transmitter 110: power unit
120: storage unit 130: road traffic sign code generation unit
140: transmitting unit 150: control unit
160: wired and wireless communication unit 200: road traffic sign information receiver
300: road traffic sign information control server

Claims (10)

A road traffic sign installed at a periphery of a road and providing traffic information of the road to a car including an autonomous vehicle operating the road;
By encoding the information on the road traffic sign of the road traffic sign with reference to the information on the road traffic sign defined based on the Graphic Data Dictionary (GDD) information, the information on the encoded road traffic sign is converted into the vehicle. A road traffic sign code generation unit for transmitting;
A road traffic sign information transmitter for modulating and transmitting the encoded road traffic sign into a signal including visible light communication, wireless communication, or a combination thereof to a vehicle driving the road; And
Single or duplexing according to the importance and priority of the information on the road traffic sign to control the transmission of the information on the encoded road traffic sign in addition to the visible light communication, wireless communication, infrared communication or ultrasonic communication A control unit;
The GDD information is
Language-independent information, which includes a graphic part indicating the meaning of the road traffic sign and a unique code value determined according to the graphic part,
Whenever an update occurs periodically or aperiodically through a wired or wireless network, the updated information is provided from a GDD information management server.
The road traffic sign information transmitting apparatus comprising the specific section information of the road to which the road traffic sign affects and information of a starting point, a length, and an ending point of the road for the specific section information. delete delete delete delete Providing traffic information of the road to a vehicle including an autonomous vehicle installed at a periphery of the road and operating the road through a road traffic sign;
The road traffic sign information transmitter encodes the information on the road traffic sign of the road traffic sign by referring to the information on the road traffic sign defined on the basis of the Graphic Data Dictionary (GDD) information. Transmitting information about the vehicle to the vehicle;
Transmitting, by the road traffic sign information transmitter, information on the encoded road traffic sign to a signal including visible light communication, wireless communication, or a combination thereof to a vehicle driving the road; And
In the road traffic sign information transmitter, any one of wireless communication, infrared communication, or ultrasonic communication in addition to visible light communication in addition to the visible light communication, the information about the encoded road traffic sign is single or duplexed according to the importance and priority of the information on the road traffic sign. And adding one more to control transmission.
The GDD information is
Language-independent information, which includes a graphic part indicating the meaning of the road traffic sign and a unique code value determined according to the graphic part,
Whenever an update occurs periodically or aperiodically through a wired or wireless network, the updated information is provided from a GDD information management server.
The road traffic sign information transmission method comprising the specific section information of the road to which the road traffic sign affects and information of the starting point, the length and the ending point of the road for the specific section information. delete delete delete delete

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