KR20020090044A - Method and system for road surface state and traffic information supply - Google Patents

Abstract

PURPOSE: A system and a method for providing information about a state of road surface and a state of traffic are provided to detect a freezing state or a soaking state of the road surface by installing a sensor to a vehicle. CONSTITUTION: A sensor portion(110) has a vibration sensor(111) and a humidity sensor(112). The vibration sensor(111) is used for sensing a state of road surface on the basis of a vibrating state of a vehicle. The humidity sensor(112) is used for sensing a state of freezing and a state of soaking on the basis of humidity of the road surface. A vehicle terminal(120) has a wireless portion(122), an interface portion(123), a storage portion(124), and a control portion(121). The wireless portion(122) performs wireless communication with a base station. The interface portion(123) is used for connecting various multimedia devices with a portable device such as a notebook computer. The storage portion(124) stores information of the sensor portion(110), the wireless portion(122), and the interface portion(123). The control portion(121) controls operations of the sensor portion(110), the wireless portion(122), the interface portion(123), and the storage portion(124).

Description

System and method for providing information on road conditions and traffic conditions {Method and system for road surface state and traffic information supply}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the provision of traffic information using a dedicated short range communication intelligent transport system (DSRC ITS). In particular, the present invention provides a road surface with traffic status information. The present invention relates to a system and method for providing status and traffic information.

The short-range dedicated wireless communication method uses a frequency band of 5.8 GHz to wirelessly communicate between a roadside base station (RSE) and an on-board equipment (OBE) installed around a road. Communication is possible only when a vehicle with a vehicle mounting apparatus passes through a communication zone formed by an antenna connected to the communication zone, and the communication region is a short wireless communication region having a cell size of 3 to 30M. to be.

The reason for selecting the short wireless communication area as described above is that the traffic volume according to the movement of the vehicle can be collected and distributed in real time, and the advantages of accurate location tracking of the vehicle.

Intelligent traffic network system using short-range dedicated wireless communication system can accommodate various traffic services in one vehicle terminal, provide stable data channel, high speed packet by efficient communication and use of radio resources in narrow communication area, etc. It provides communication and provides a simple user interface for voice synthesis, short text / image display, keypad input devices, IC cards, and more.

Services provided by using a short-range wireless communication method include traffic information service and bus information service, and both active traffic information service and bus information service exchange active information between a terminal mounted in a vehicle and a roadside base station. Use wireless communication method.

Conventional short-range wireless communication system for providing traffic information is the same as Figure 1, Figure 1 is a structural diagram showing the structure of a short-range transmission wireless communication system for providing traffic information.

Referring to FIG. 1, a short-range wireless communication system is installed in a vehicle to generate vehicle information and traffic information, and the like to provide a vehicle mounting apparatus 100 and a bus guide system to wirelessly transmit the vehicle information and traffic information. A bus terminal system 200 mounted on a bus, a roadside base station 200 which is capable of wirelessly communicating with the vehicle-mounted device 100 and the bus information system terminal 500, and the roadside base station 200. Is connected to the short-range dedicated wireless communication ITS (Intelligent Traffic Network) server 300 for collecting and analyzing various information transmitted from the vehicle-mounted device 100, and the short-range dedicated wireless communication ITS server 300, each It comprises a traffic information collection server 400 for collecting and analyzing traffic information transmitted from the region.

In the short-range dedicated wireless communication system configured as described above, the vehicle-mounted device 100 and the bus information system terminal 500 mounted on the vehicle traveling on the road grasp the current traffic situation by using the speed and the stop time. The information is transmitted to the roadside base station 200.

The roadside base station 200 receives the traffic information from all the vehicles in the communication area, and transmits it to the ITS server 300 for short-range dedicated wireless communication.

Since the ITS server 300 for short-range dedicated wireless communication is connected to a plurality of roadside base stations 200 and 200 ', the traffic information collection server may be synthesized by combining traffic information transmitted from each roadside base station 200 and 200'. 400, the traffic information collection server 400 collects traffic information transmitted from a plurality of short-range dedicated wireless communication ITS server 300, and the integrated traffic information back to short-range dedicated wireless communication ITS server 300 To send.

The short-range dedicated wireless communication ITS server 300 analyzes the traffic information received from the traffic information collection server 400, and transmits the information to the roadside base station 200 of the region, the roadside base station 200 communicates Transmission to each vehicle mounting apparatus 100 and the bus information system terminal 500 in the area, so that the driver can drive with reference to the traffic information.

However, in the related art, when collecting and providing traffic information using a short-range dedicated wireless communication system, the speed of the vehicle and the number of vehicles in the communication area could be determined to determine the degree of vehicle delay, but natural disasters such as snow or rain As there was no way to know the condition of road surface and unevenness due to road construction, traffic information provision was incomplete.

In order to solve the above problems, the present invention is attached to the vehicle mounting apparatus of the vehicle by attaching a sensor that can determine the state of the road surface damage due to unevenness or construction of the road surface, road due to snow, rain or temperature Provides road condition information using a short-range wireless communication system to determine the freezing or flooding of roads, and provides road conditions and traffic conditions that can be used as traffic information for safe driving and shortening the driving time of vehicles. Its purpose is to provide a system and method.

1 is a structural diagram showing a short-range dedicated wireless communication system for providing traffic information.

Figure 2 is a block diagram showing the structure of the on-vehicle device of the road condition and traffic information providing system according to an embodiment of the present invention.

3 is a flow chart showing a message flow of the road condition and traffic status information providing method according to an embodiment of the present invention.

<Brief description of the main parts of the drawings>

100, 100 ': vehicle loading device 200, 200': roadside base station

300: short-range dedicated wireless communication server 400: traffic information collection server

500: bus information system terminal.

The road surface and traffic situation information providing system according to the present invention,

A vehicle-mounted device mounted on a vehicle, the vehicle-mounting device including a sensor unit for detecting unevenness of the road surface, a working state and freezing or flooding, and a vehicle terminal for transmitting road surface state information detected by the sensor unit;

A roadside base station for wireless communication with the vehicle-mounted device;

A short-range dedicated wireless communication server connected to the roadside base station for collecting and analyzing information transmitted from the vehicle-mounted device;

And a traffic network server connected to the short-range dedicated wireless communication server to receive, store, and analyze traffic information and road surface information.

Preferably, the sensor unit and a vibration sensor for measuring the degree of vibration of the vehicle to detect the unevenness and the working state of the road surface; Characterized in that it comprises a humidity sensor for detecting freezing, dew condensation and flooding.

Preferably, the vehicle terminal includes a radio unit including an antenna for transmitting and receiving radio signals with the roadside base station and a radio transmission and reception unit; A storage unit for storing data transmitted and received with the roadside base station; A control unit for controlling all signal processing and respective systems in the vehicle terminal; And a multimedia unit including an audio and video device for providing the driver with information such as traffic information or road surface condition information.

In addition, the road surface and traffic conditions information providing method according to the present invention,

When the sensor part of the vehicle-mounted device travels on the road,

The sensor unit of the vehicle-mounted device detects unevenness and working condition of the road using a vibration sensor, detects freezing or flooding of the road by using a humidity sensor, and transmits road surface detection result information to the vehicle terminal controller, respectively. Doing;

Determining the state of the road surface by using the road surface state detection result information received from the controller of the vehicle terminal and transmitting the road surface state information to the roadside base station;

And transmitting the road surface state information received from the roadside base station to all the vehicles in the communication area.

Preferably, the roadside base station transmitting the road surface state information and traffic-related information received from all the vehicles in the communication area to the server for short-range dedicated wireless communication;

In the short-range dedicated wireless communication server, the road information or traffic related information received from the roadside base station connected to the surrounding is synthesized, and the traffic information provision parameter is generated to transmit the road surface information and traffic related information to the roadside base station. Transmitting the traffic information provision parameter to an information collection server;

Synthesizing the information received from the short-range dedicated wireless communication server and generating traffic information by the traffic information collecting server, and transmitting the traffic information to the short-range dedicated wireless communication server and other service media;

Selecting, by the short-range wireless communication server receiving the traffic information, a roadside base station determined to require traffic information and generating a traffic information message to be transmitted to the selected roadside base station;

And transmitting the traffic information message to the vehicle in the communication area by the roadside base station receiving the traffic information message.

Referring to the accompanying drawings, a system structure and method for providing a road surface condition and traffic information according to the present invention configured as described above are as follows.

2 is a block diagram showing the structure of a vehicle-mounted device of the road condition and traffic information system according to an embodiment of the present invention, Figure 3 is a message of the road condition and traffic status information providing method according to an embodiment of the present invention Flow chart showing the flow.

In addition, the present invention has the same structure as the basic structure of the conventional short-range dedicated wireless communication system.

That is, the vehicle mounting apparatus 100 mounted in the vehicle for generating vehicle information and traffic information and transmitting them wirelessly, the bus guidance system terminal 500 mounted on the bus for the bus guidance system, and the vehicle mounting apparatus And a roadside base station 200 for wirelessly communicating with the terminal 100 for bus guidance system 500 and the roadside base station 200 to collect various information transmitted from the vehicle-mounted device 100, It is configured to include a traffic information collection server 400 connected to the ITS server 300 for short-range dedicated wireless communication to analyze and the ITS server 300 for short-range dedicated wireless communication to collect and analyze traffic information transmitted from each region. do.

Further, the other roadside base station 200 'and the vehicle-mounted device 100' are simply examples of roadside base station 200 'and another vehicle-mounted device 100' in another communication area.

In order to provide road surface information according to the present invention, the vehicle mounting apparatus 100 has a structure as shown in FIG. 2.

Referring to FIG. 2, a sensor unit 110 for detecting a road surface state and a vehicle terminal 120 for wireless communication with the roadside base station 200 are included.

Here, the sensor unit 110 is a vibration sensor 111 for sensing the vibration degree of the vehicle to detect the unevenness and the working state of the road, and humidity for detecting the freezing and flooding situation by sensing the humidity of the road surface It is configured to include a sensor (112).

In addition, the vehicle terminal 120 is a wireless unit 122 composed of an antenna and a wireless transceiver for wireless communication with the roadside base station 200, and a variety of images and sounds for providing a variety of multimedia information to the vehicle driver An interface unit 123 for interfacing with other devices such as a multimedia device and a notebook, and a storage unit 124 for storing information from the wireless unit 122, the interface unit 123, and the sensor unit 110. And a controller 121 for controlling the sensor unit 110, the wireless unit 122, the interface unit 123, and the storage unit 124. In addition, the interface unit 123 may be connected to a vehicle-mounted device by connecting a device such as a sound device and a video device or a laptop for various multimedia so that the driver can use services such as the Internet or movie watching.

The road surface condition and traffic information providing system configured as described above is operated in the order as shown in FIG. 3.

Referring to FIG. 3 in detail, first, the vehicle mounting apparatus 100 mounted on the driving vehicle generates ID and road surface state information of the vehicle terminal (S301).

The road surface state information is generated by the vibration sensor 111 included in the sensor unit 110 in the vehicle-mounted device 100 detects a road surface due to unevenness or construction of the road according to the degree of vibration, and the humidity sensor 112. ) Measures the humidity on the road surface to detect flooding or freezing, and transmits the detected information to the controller 121 of the vehicle terminal 120.

The on-vehicle device 100 transmits the measured road surface state information to the roadside base station 200 (S302). The wireless unit 122 transmits road surface state information received from the sensor unit 111 in the control unit 121. Through wireless transmission to the roadside base station (200).

The roadside base station 200 transmits the received road surface information to all the vehicle-mounted device 100 and the short-range dedicated wireless communication ITS server 300 in the communication area of the corresponding roadside station, respectively (S303 and S304).

The short-range dedicated wireless communication ITS server 300 is connected to a plurality of roadside base stations (200, 200 '), by combining the road condition information and traffic information received from each roadside station (200, 200'), traffic information A traffic information parameter for providing is generated (S305).

In this case, the traffic information transmitted from the roadside base station (200, 200 ') is the traffic information and the roadside base station (200) transmitted by the vehicle-mounted device (100, 100') and the bus information system terminal 500 based on the speed, etc. , 200 ') indicates numeric information of the vehicle in the communication area.

The short-range dedicated wireless communication ITS server 300 transmits the combined road surface information and traffic-related information to all the plurality of roadside base stations 200 and 200 'managed by the short-range dedicated wireless communication ITS server 300 (S306). In step S307, the generated traffic information parameter is transmitted to the traffic information collection server 400.

Since the traffic information collection server 400 is also connected to the plurality of short-range dedicated wireless communication ITS server 300, it collects and analyzes the traffic information parameters transmitted from each short-range dedicated wireless communication ITS server 300, Generate comprehensive traffic information (S308).

The comprehensive traffic information is transmitted to a plurality of short-range dedicated wireless communication ITS server 300 managed by the traffic information collection server 400 (S309). In addition, it is also transmitted to another traffic information service medium, such as the Internet (S310).

The ITS server 300 for short-range wireless communication, which has received the comprehensive traffic information, analyzes an area requiring the comprehensive traffic information, determines a roadside base station 200 located in the area, and transmits the comprehensive traffic information. To generate a traffic information message (S311), and transmits a comprehensive traffic information message (S312).

The roadside base station 200 having received the traffic information message transmits the traffic information message to all vehicles in the communication area (S313).

In this case, the traffic information may include a vehicle delay section, traffic accident information, and road surface information, so that the vehicle receiving the information may suddenly change road conditions and a traffic delay section.

As described above, the road surface condition and traffic information providing system and method according to the present invention provide information such as unevenness and freezing of a road surface to a short-range dedicated wireless communication system that provides traffic information such as a traffic delay section and an accident section. By adding a function to provide a driver, the driver is familiar with the unevenness, freezing, flooding, etc. due to the construction of the road in advance to enable safer driving, and has the effect of reducing the vehicle running time.

Claims (5)

A vehicle-mounted device mounted on a vehicle, the vehicle-mounting device including a sensor unit for detecting unevenness of the road surface, a working state and freezing or flooding, and a vehicle terminal for transmitting road surface state information detected by the sensor unit; A roadside base station for wireless communication with the vehicle-mounted device; An ITS server for short-range dedicated wireless communication connected to the roadside base station for collecting and analyzing information transmitted from the vehicle-mounted device; And a traffic network server connected to the ITS server for short-range dedicated wireless communication, the traffic network server configured to receive, store, and analyze traffic information and road surface information. The method of claim 1, wherein the sensor unit Vibration sensor for measuring the degree of vibration of the vehicle to detect the unevenness and the working state of the road surface; Road condition and traffic information providing system structure including humidity sensor to detect freezing, condensation and flooding. The method of claim 1, wherein the vehicle terminal A radio unit including an antenna and a radio transceiver for transmitting and receiving radio signals with the roadside base station; A storage unit for storing data transmitted to and received from the roadside base station; A control unit for controlling all signal processing and respective systems in the vehicle terminal; A road surface and traffic condition information providing system structure comprising a multimedia unit including an audio and video device for providing the driver with information such as the traffic information or road condition information. When the sensor part of the vehicle-mounted device travels on the road, The sensor unit of the vehicle-mounted device detects unevenness and working condition of the road using a vibration sensor, detects freezing or flooding of the road by using a humidity sensor, and transmits road surface detection result information to the vehicle terminal controller, respectively. Doing; Determining the state of the road surface by using the road surface state detection result information received from the controller of the vehicle terminal and transmitting the road surface state information to the roadside base station; And transmitting the road surface state information received from the roadside base station to all the vehicles in the communication area. 5. The roadside base station of claim 4 wherein Transmitting road condition information and traffic related information received from all vehicles in the communication area to a short-range dedicated wireless communication server; In the short-range dedicated wireless communication server, the road information or traffic related information received from the roadside base station connected to the surrounding is synthesized, and the traffic information provision parameter is generated to transmit the road surface information and traffic related information to the roadside base station. Transmitting the traffic information provision parameter to an information collection server; Synthesizing the information received from the short-range dedicated wireless communication server and generating traffic information by the traffic information collecting server, and transmitting the traffic information to the short-range dedicated wireless communication server and other service media; Selecting, by the short-range dedicated wireless communication server receiving the traffic information, a roadside base station in a region determined to be necessary for traffic information, and generating a traffic information message to be transmitted to the selected roadside base station; And the roadside base station receiving the traffic information message, transmitting the traffic information message to a vehicle in a communication area.