KR100308773B1 - Automatic detection of traffic conditions and device - Google Patents

Abstract

In accordance with an aspect of the present invention, there is provided a method for automatically detecting a traffic condition including a client vehicle including a GPS receiver, a vehicle speed A / D converter, a standard time manager, and a vehicle rotation information A / D converter, a GIS, a map database, an attribute database, and a traffic volume information storage unit. And automatically detecting a traffic condition by wireless communication between servers, which are a traffic control center having a vehicle history information storage unit, the method comprising: GPS position information, speed information, time information, and rotation information of the client vehicle every information transmission period. Collecting traffic information and configuring the packet information; Converting the packet information configured in the step into a format suitable for wireless communication; Transmitting the traffic information converted in the format to the server using wireless communication; Converting the traffic information transmitted in the step into a packet information format that can be processed by the GIS of the server; A GIS of the server analyzing the packet information converted in the above step and searching for the current position of the client vehicle using the map database and the attribute database; Storing the current location of the client vehicle retrieved in the step in a vehicle history information database; Analyzing traffic conditions from traffic information transmitted from the client vehicle and current location information of the client vehicle retrieved in the step; Storing the traffic condition analyzed in the step in a traffic volume information database; Calculating an information transmission period of the client vehicle from traffic information transmitted from the client vehicle and current position information of the client vehicle retrieved in the step; And transmitting the information transmission period of the client vehicle calculated in the step to the client vehicle.

An automatic traffic condition detection apparatus according to the present invention includes a client vehicle having a GPS receiver, a vehicle speed A / D converter, a standard time manager, and a vehicle rotation information A / D converter, a server that is a traffic control center having a map database and an attribute database. An apparatus for automatically detecting a traffic situation by wireless communication between the apparatus, the apparatus comprising: a program module for controlling a device of a GPS receiver, a vehicle speed A / D converter, a standard time manager, and a vehicle rotation information A / D converter installed in the client vehicle. DICM; A client-side communication module (CM-C) for changing the traffic information packet from the DICM into a format suitable for a characteristic of a wireless communication equipment in use; Client-side wireless communication equipment for transmitting traffic information to a server; Server-side wireless communication equipment for wireless communication with the client vehicle; A server-side communication module (CM-S) for converting traffic information of a RCD (Remote Communication Device) format from the server-side wireless communication equipment into a packet information format; A GIS for analyzing vehicle history information and traffic state information using information provided from a client and information of a map database and an attribute database; An information transmission period determination unit for determining an information transmission period (DTIT) at which a client transmits information to a server by using the information analyzed by the GIS; And it characterized in that it comprises a storage unit for storing the information analyzed by the GIS.

According to the method and apparatus for automatically detecting traffic conditions according to the present invention, since information detected by a client vehicle is automatically processed and stored in a database of a traffic control center as a server, the time and space limitation of a road to be detected is overcome. The information accumulated in the database of the server can be used as basic data of various statistical data. In addition, since the client vehicle and the server transmit and receive information in real time, it is easy to track the client vehicle, and in the case of the client vehicle in which the vehicle navigation apparatus is installed, the GPS error can be corrected by receiving a GPS correction value from the server.

Description

Automatic detection of traffic conditions and device

The present invention relates to a traffic condition automatic detection method and apparatus for automatically detecting traffic conditions and accumulating traffic information in a database of a server through wireless communication between a client vehicle and a traffic control center which is a server.

Recently, as the standard of living improves, the number of vehicles owned by all citizens is rapidly increasing, and the expansion and construction of roads for smooth communication of these vehicles is progressing very slowly. Therefore, the necessity of grasping the traffic condition of the road in real time is increasingly important for optimal vehicle operation using the existing road.

The present invention develops a variety of device interface system based on the Geographic Information System (GIS) technology to automatically detect the traffic condition of each road and automatically It is about.

Conventional methods for detecting road traffic conditions include a method of attaching a speed sensor to the bottom of a road, a method of using CCTV, a method of directly informing a traffic operator, and the like.

The method of attaching the speed sensor to the floor of the road can detect the traffic condition of the road unattended, automatically and in real time, but the sensor is damaged by the overload vehicle, the sensor is damaged due to the change of the pavement material in the summer, There is a problem such as deterioration of the sensor due to repacking, and the precise situation is not known because the location where the sensor is embedded is limited to the main road and the embedding interval reaches hundreds of meters or kilometers. The basic concept of ITS (Intelligent Transportation System) currently underway in Korea is to detect various situations on the road by attaching various sensors to the road or facilities around the road.

Using CCTV is a method of installing CCTVs on main roads and highways and on three-dimensional intersections to identify traffic conditions on roads.This method also has a fixed sensing device, so traffic conditions on roads without CCTVs are installed. Has no known disadvantage. In addition, the process of building a database of road conditions identified by CCTV is not automatic.

The method of directly informing the traffic correspondent overcomes the fixedness of the detection means, but the detection of traffic conditions is not automatically performed, and the number of traffic communicators is not only limited due to the limitation of the operating cost, and there is a disadvantage in that it is impossible to detect 24 hours. .

An object of the present invention is to solve the problems of the prior art as described above, by introducing the concept of a client server, the traffic situation information automatically collected from the client as a vehicle to the server as a traffic control center using a wireless communication equipment It is delivered in real time, the server performs a variety of analysis process using the information transmitted from the Geographic Information System (GIS), to provide a traffic situation automatic detection method and apparatus for providing traffic information.

Still another object of the present invention is to automatically detect a traffic situation that can operate a traffic guidance system in various ways such as PC communication, Internet, ARS, and broadcasting by using various application programs operated by a geographic information system (GIS) of a server. It is to provide a method and an apparatus thereof.

Still another object of the present invention is to provide a method for automatically detecting a traffic situation, by using the real-time information from a client vehicle, to construct information about the movement of the client vehicle into a history information database of the client vehicle to enable tracking of a stolen vehicle. To provide a device.

1 is a block diagram of a traffic condition automatic detection apparatus according to the present invention.

2 is an example of implementing the DICM and client-side communication module shown in FIG. 1 with a single chip computer.

3 is a detailed configuration diagram of the GIS of the server shown in FIG.

4 is a detailed flowchart illustrating the operation of the client in the traffic condition automatic detection method according to the present invention.

5 is a view for explaining an operation performed in the vehicle navigation apparatus when the vehicle navigation apparatus is installed in the client vehicle.

6 is a detailed flowchart illustrating the operation of the server in the traffic situation automatic detection method according to the present invention.

<Description of the symbols for the main parts of the drawings>

15: Client Side Control Program Module (DICM)

16: client-side communication module (CM-C)

18: vehicle navigation system (CNS) 22: server-side communication module (CM-S)

23: geographic information system (GIS) 24: information transmission cycle (DTIT) determination unit

310: user interface unit 320: interface control unit

330: query processor 340: database management unit

350: location analyzer 360: packet information analyzer

In order to achieve the above object, the traffic condition automatic detection method according to the present invention includes a client vehicle and a GIS having a GPS receiver, a vehicle speed A / D converter, a standard time manager, a vehicle rotation information A / D converter, A method for automatically detecting a traffic situation by wireless communication between servers, which is a traffic control center having a map database, an attribute database, a traffic volume information storage unit, and a vehicle history information storage unit, comprising: a data transfer interval (DTIT) Collecting traffic information of GPS location information, speed information, time information, and rotation information in each of the client vehicles and configuring the packet information into packet information; Converting the packet information configured in the step into a format suitable for wireless communication; Transmitting the traffic information converted in the format to the server using wireless communication; Converting the traffic information transmitted in the step into a packet information format that can be processed by the GIS of the server; A GIS of the server analyzing the packet information converted in the above step and searching for the current position of the client vehicle using the map database and the attribute database; Storing the current location of the client vehicle retrieved in the step in a vehicle history information database; Analyzing traffic conditions from traffic information transmitted from the client vehicle and current location information of the client vehicle retrieved in the step; Storing the traffic condition analyzed in the step in a traffic volume information database; Calculating an information transmission period of the client vehicle from traffic information transmitted from the client vehicle and current position information of the client vehicle retrieved in the step; And transmitting the information transmission period of the client vehicle calculated in the step to the client vehicle.

In addition, the traffic condition automatic detection apparatus according to the present invention, a traffic control center having a client vehicle, a map database, and a property database including a GPS receiver, a vehicle speed A / D converter, a standard time manager, and a vehicle rotation information A / D converter A device for automatically detecting a traffic situation by wireless communication between an in-server, comprising: a program for controlling a device of a GPS receiver, a vehicle speed A / D converter, a standard time manager, and a vehicle rotation information A / D converter installed in the client vehicle Module DICM; A client-side communication module (CM-C) for changing the traffic information packet from the DICM into a format suitable for a characteristic of a wireless communication equipment in use; Client-side wireless communication equipment for transmitting traffic information to a server; Server-side wireless communication equipment for wireless communication with the client vehicle; A server-side communication module (CM-S) for converting traffic information in RCD format from the server-side wireless communication equipment into packet information format; A GIS for analyzing vehicle history information and traffic condition information using information provided from a client and information of a map database and an attribute database; An information transmission period determination unit for determining an information transmission period (DTIT) at which a client transmits information to a server by using the information analyzed by the GIS; And it characterized in that it comprises a storage unit for storing the information analyzed by the GIS.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a traffic condition automatic detection apparatus according to the present invention.

The vehicle 10 as a client includes a satellite positioning system (GPS) receiver 11, a vehicle speed A / D converter 12, a standard time manager 13, and vehicle rotation information. A hardware device such as an A / D converter 14 and a device interface control module (DICM) 15, which is a program module for controlling the devices, and a traffic information packet from the DICM 15 are used for the characteristics of the wireless communication equipment in use. Client-side communication module (CM-C) 16 and client-side wireless communication equipment 17 that change to the correct format.

The traffic control center 20, which is a server, processes the radio communication equipment 21 such as TRS PCS for wireless communication with the client vehicle, and the traffic information in the RCD format from the wireless communication equipment 21 in the GIS of the server. Server-side communication module (CM-S) 22 for converting a format into packet information, GIS 23 for analyzing vehicle history information and traffic state information using information and geographical position information provided from a client, and the GIS An information transmission period determination unit 24 for determining an information transmission period DTIT for transmitting information to the server by using the information analyzed by the 23 and storing the information analyzed by the GIS 23. It is equipped with the storage part 25,26.

1, the flow of information of a traffic control center which is a client vehicle and a server having the above-described configuration will be described in detail.

First, the current position and time, speed and rotation information of the client vehicle are collected into the in-vehicle DICM 15. The current position of the vehicle is sent from the GPS receiver 11 to the DICM 15 with longitude and latitude coordinates for the current position of the vehicle. The vehicle speed is converted into digital data by the vehicle speed A / D converter 12 and sent to the DICM 15. The standard time manager sends data on the current time information to DICM for server and client synchronization. The rotation information is converted into digital data from the vehicle rotation information A / D converter 14 and obtained by using the steering device or the direction indicator of the vehicle and sent to the DICM 15.

The DICM 15 forms a traffic information packet from the above-mentioned information and transmits it to the client-side communication module (CM-C) 16. The traffic information packet includes information about the ID, time, location, speed, and rotation angle of the client vehicle.

The CM-C 16 converts the traffic information packet transmitted from the DICM 15 into RCD format information, that is, information in a format suitable for the characteristics of the currently used wireless communication equipment, and thereby the client-side wireless communication equipment 17. To send.

The wireless communication network can be selected in consideration of economic conditions such as TRS network, PCS network and broadcasting network and stability of the network.

When traffic information is transmitted to the server-side wireless communication equipment 21 through the client-side wireless communication equipment 17, the server-side communication module (CM-S) 22 processes the traffic information in the RCD format in the GIS 23. The packet information is converted into a packet information format that can be transmitted to the GIS 23.

The GIS 23 separates the received packet into GPS coordinates, vehicle speed, time, rotation angle, and vehicle ID, and stores the map database 27 where the electronic map is stored and the attribute information of each road. Information on the road number, road name, road width, type of road, location of the vehicle on the road, etc., which is the geographic location information where the current vehicle is located, using the information in the property database 28 Is stored in the vehicle history information database 26, and the traffic conditions are analyzed from the separated traffic information and stored in the traffic volume information database 25. In addition, the traffic volume information and the retrieved vehicle position result are transmitted to the information transmission period determiner 24.

The information transmission period determination unit 24 calculates an information transmission period DTIT, which is a period for transmitting information to the server from the traffic volume information from the GIS 23 and the retrieved vehicle position result, and then executes the server-side communication module CM-S. (22), and transmits to the client via the server-side communication equipment (21).

In addition, the vehicle, which is a client, may optionally be further equipped with a vehicle navigation device 18, in which case the following information flow (indicated by the dotted line in FIG. 1) is further included.

The GPS receiver 11 transmits the GPS coordinates to the DICM 15 according to a period determined by the vehicle navigation apparatus 18, and converts the GPS coordinates by converting them into the vehicle navigation apparatus 18. The vehicle navigation device 18 retrieves map information from the CD-ROM in which the map is stored using the received GPS coordinates, and outputs the current location of the vehicle and a road map on the user screen. At this time, the server may further include an error correction unit (not shown) for calculating a GPS error correction value for correcting the GPS error from the vehicle position information retrieved from the GIS. That is, when the vehicle navigation apparatus is installed in the client vehicle, the server transmits the information transmission period determined from the information transmission period determination unit 24 and the GPS error correction value calculated by the error correction unit to the client vehicle, and the GPS error. The correction value is transmitted to the vehicle navigation apparatus 18.

FIG. 2 is an example of implementing the DICM and client-side communication module shown in FIG. 1 with a single chip computer 210.

In FIG. 2, the 8KB EPROM 211 includes all control programs necessary to implement the functions of the DICM 15 and the client side communication module 16 of FIG.

The 128B SRAM 212 is used as a memory for temporarily storing data necessary for performing a control program.

The two 16-bit tires 213 generate a clock due to the information transmission period received from the server and a clock for the GPS receiver 11 independently of the clock.

The serial input / output port 214 is responsible for the interface between the wireless communication equipment 17 for transmitting and receiving information between the client and server and the single chip computer 210 shown in FIG.

Four 8-bit input / output ports 215 are provided with a vehicle speed A / D converter 12, a vehicle rotation information A / D converter 14, a GPS receiver 11, and a standard time manager 13, as shown in FIG. It is responsible for the interface 210 with the chip computer.

FIG. 3 is a detailed configuration diagram of the GIS of the server shown in FIG. 1. As shown in FIG. 3, the GIS of the server is largely divided into a user interface 310, an interface controller 320, a query processor 330, a database manager 340, a location analyzer 350, and a packet information analyzer 360. It is composed of

The user interface 310 is a part in which the operator of the server can exchange information with the GIS, and browsers such as the query browser 311, the map browser 312, the map control browser 313, the table browser 314, and the like. And an input unit 315 and an output unit 316.

The query browser 311 may use a menu provided by the server as a server that allows a user to request various query processing from the GIS, or may use SQL (Structured Query Language). The map browser 312 is a server capable of outputting a map by query processing or inputting new map information. The map control browser 313 is a server that performs control so that the user can output only desired map information. The table browser 314 is a server capable of outputting character information by query processing or inputting a new attribute composed of characters. The input unit 315 is used to input map information, and the output unit 316 outputs character information related to the map or the map in addition to the monitor.

The interface controller 320 converts the data input through the input unit 315 of the user interface 310 into a data format that can be processed by a GIS, or converts the data of the GIS format into the output unit of the user interface 310. Convert to a format that can be output through (316).

The query processor 330 processes a query requested from the user interface 310, the server-side communication module 22, or the information transmission period determiner 24, and the query separation / combining unit 331 and attribute information. It is composed of a query processor 332 and a map information query processor 333.

The query separating / combining unit 331 divides the query into an attribute information query and a map information query, and combines the processed query results. The attribute information query processor 332 processes a query related to attribute information, and the map information query processor 333 processes a query related to map information.

The database manager 340 is a server that performs a function of retrieving data required by the query processor 330 from a database and a function of storing data processed by the query processor 330 in a database. The attribute information database manager 341 ) And a map information database manager 342.

The attribute information database manager 341 stores or retrieves data related to attribute information in a database. The map information database manager 342 stores or retrieves data related to map information in a database.

The location analyzer 350 analyzes the exact location of the vehicle using the geographic location information retrieved from the GIS of the server, the speed information of the vehicle, and the rotation information of the vehicle using the GPS location received from the client. This information is used to correct GPS errors and determine how often to send information to the client.

The packet information analyzer 360 analyzes the traffic information packet received from the client and converts it into a form that can be processed by the GIS of the server.

4 is a detailed flowchart illustrating the operation of the client in the traffic condition automatic detection method according to the present invention. In the automatic traffic situation detection method according to the present invention, the client starts transmitting information when the single-chip computer shown in FIG. 2 is first installed, and stops transmitting information only when the client vehicle is abandoned or the device is abnormal. do. In other words, the user cannot arbitrarily stop transmitting information.

First, when the client vehicle is started up (step 400), the operation of the single chip computer shown in FIG. 2 according to the present invention is automatically started, and in the case where the vehicle navigation apparatus is installed in the client vehicle, it is shown in FIG. Perform additional operations as described above.

The DICM sends a self diagnostic clock pulse and a self diagnostic packet to each device (step 401).

Each device performs self-diagnosis in the order programmed in the embedded ROM (step 402) and notifies DICM of the diagnosis result (step 403).

It is determined whether all equipment is normal (step 404), and if it is normal, it transmits an information transmission start signal to a traffic control center which is a server (step 405).

Standard time information is received from the traffic control center, which is a server, to set the time of the standard time manager of the client vehicle (step 406).

An initial information transmission period DTIT is received from a traffic control center which is a server (step 407). If a vehicle navigation system is installed in the client vehicle, GPS error correction information is simultaneously received from the server, the traffic control center, together with the initial information transmission period (DTIT).

Step 406 and step 407 may be performed simultaneously to reduce the load on wireless communication. In other words, information can be transmitted by compressing it into one packet.

Traffic information is transmitted to the server in accordance with the information transmission period received in step 407 (step 408). The traffic information, as described above, includes time, location (GPS), speed and rotation angle information, including the ID of the client vehicle.

It is determined whether the vehicle is in operation (step 409), and if the vehicle is in operation, steps 407 and 408 are repeated. If the vehicle is not in operation according to the determination of step 409, the vehicle enters the standby state. In the standby state, only the current position of the client vehicle, that is, the GPS coordinates, is transmitted to the server according to a predetermined information transmission period (step: 410). In step 411, it is determined whether the vehicle operation is resumed.

As a result of the determination in step 411, when the vehicle is resumed in the standby mode, the step of transmitting the self-diagnosis clock pulse and the self-diagnosis packet by the DICM in step 401 to each device is repeated.

On the other hand, if the operation of all the equipment is not normal as a result of the determination in step 404, it is determined whether the self-diagnosis process of steps 402 and 403 has been performed a specified number of times (step: 412), otherwise If 402 and step 403 are repeated, and the number of times is specified, it is determined whether the operation of the wireless communication equipment is normal (step: 413). If the operation of the wireless communication equipment is not normal, there is no way to communicate with the server, so the transmission operation is stopped. If the operation of the wireless communication device is normal, at least one of the other devices will be abnormal, so the device self-diagnosis result is notified to the server (step: 414), and the transmission operation is stopped.

When the transmission operation is interrupted as described above, normal information is not transmitted and received between the client and the server, and since the client vehicle is not in the standby state, the server may detect abnormal operation of the equipment.

FIG. 5 is a diagram illustrating an operation performed in the vehicle navigation apparatus when the vehicle navigation apparatus is installed in the client vehicle. Even if the operation below step 401 shown in FIG. 4 is not normal, if only the GPS receiver is normally operated, it may be operated independently. When the operation 401 or less illustrated in FIG. 4 is normal, the correct vehicle position may be provided to the vehicle navigation apparatus of the client vehicle using GPS error correction information transmitted from the GIS operated by the server. Typically, the error in the coordinates received by the GPS receiver is up to 100 meters. This is because the GPS satellites operated in the United States intentionally add a random error to the GPS coordinates provided to civilians regardless of the receiver's accuracy. According to the present invention, the above-described error of GPS coordinates can be overcome by using the GPS error correction information transmitted from the server.

After the vehicle is started, the user inputs user requirements such as requesting the vehicle navigation apparatus to output the current position of the vehicle, inputting the starting point and the destination, and outputting the shortest and the best route ( Step: 501).

Receive the current position coordinates of the vehicle from the GPS receiver (step 502). This step is processed irrespective of the operation shown in Fig. 4, and is processed according to the design specification of the vehicle navigation apparatus.

The map information is retrieved from the CD-ROM operated by the vehicle navigation apparatus using the received coordinate value (step 503). In general, the vehicle navigation apparatus has its own map information, and since the map information has a large capacity, a CD-ROM is used.

It is determined whether the information transmission / reception operation between the client and the server as shown in FIG. 4 is normal (step 504). As a result, when the information transmission and reception operation between the client and the server is normal, the GPS error transmitted from the server is received from the client-side communication module (step 505), and the GPS error is corrected using this (step: 506). Output the requirements of the screen to the screen (step 506).

On the other hand, if the information transmission and reception between the client and the server is not normal as a result of the determination in step 504, the user's requirements are output to the screen without going through the GPS error correction step (step: 506).

The operation of the vehicular navigation device as described above is repeated each time a user's requirement is input.

6 is a detailed flowchart illustrating the operation of the server in the traffic condition automatic detection method according to the present invention.

First, information is received from the client (step 601), and the type of information received from the client is analyzed (step: 602). There are three types of information received from the client: a signal indicating that the operation of the equipment is abnormal, or an information transmission start signal, or a traffic information signal.

As a result of the analysis of step 602, when the signal transmitted from the client is a signal indicating that the operation of the equipment is abnormal, the operation of recovering, repairing and reinstalling the equipment is performed (step: 603).

As a result of the analysis in step 602, when the signal transmitted from the client is an information transmission start signal, the history information of the client vehicle is retrieved from the vehicle history information database (step 604), and it is determined whether there is history information (step: 605). As a result of the determination, if there is the history information, the information transmission period DTIT is calculated using the stored last history information (step 606), and the calculated information transmission period DTIT is transmitted to the client vehicle (step: 607). As a result of the determination in step 605, if there is no history information, the basic information transmission period DTIT maintained by the error correction unit of the server is transmitted to the client vehicle (step: 608).

As a result of the analysis of step 602, if the signal transmitted from the client is traffic information, the current geographical position of the client vehicle is retrieved from the map database and the attribute database managed by the server's GIS (step: 609). For example, the geographic location to be searched can be, for example, '0 0 highway 0 0 direction ◇◇ kilometers point' or '0 0 route 0 0 direction ◇◇ kilometers point', '0 0 intersection of 0 0 local road ◇◇ kilometers point' You can search in a variety of detailed forms, such as '0 0 to 0 0 ◇◇ km' and '0 0 intersection to 0 0'.

The geographical location of the vehicle retrieved in step 609 is stored in the vehicle history information database (step 610).

If the speed of the vehicle is '0' among the traffic information received from the client, it is determined whether the speed of the vehicle is '0' since the geographical position information of the vehicle is very important data for determining the traffic volume and the information transmission period (step) : 611).

As a result of the determination in step 611, if the speed of the vehicle is '0', it is determined whether the current geographical position of the vehicle is an intersection (step: 612).

As a result of the determination in step 612, when the current position of the vehicle is an intersection, the speed of the vehicle is normal, so that the information transmission cycle is corrected without performing a cause analysis process (step: 613).

As a result of the determination in step 612, if the current position of the vehicle is not an intersection, the cause analysis operation is performed by considering that the speed of the vehicle is not normal (step 615).

In addition, if it is determined in step 611 that the speed of the vehicle is not '0', it is determined whether the current speed of the vehicle is less than or equal to the threshold (step: 614). As a result of the determination in step 614, if the current speed of the vehicle is less than or equal to the threshold value, it is also considered that the speed of the vehicle is not normal and the cause analysis operation is performed (step 615). Save (step 617).

After the cause analysis operation is performed when the vehicle speed is not normal, after correcting the information transmission period DTIT using the cause analysis result (step 617), the traffic volume information is stored in the traffic information database (step : 617).

Finally, the corrected information transmission period DTIT is transmitted to the client vehicle (step 618). If the vehicle navigation apparatus is installed in the client vehicle, the server transmits the corrected information transmission period DTIT and the GPS error correction information together.

As described above, the correction of the information transmission period according to the current position or traffic volume information of the client vehicle has the following advantages.

First, it is possible to detect accurate traffic conditions on the road. In the case of vehicles traveling on smooth roads or highways, even if the DTIT is a little longer, there is no problem in detecting traffic conditions.However, if the speed of the client vehicle is lower than the reference value, the DTIT is short. This is because only accurate traffic conditions can be detected.

Secondly, the GIS load on the server can be reduced. There should be as many client vehicles as possible to pinpoint traffic conditions. However, a large number of client vehicles means that the amount of information to be processed by the server is enormous. Therefore, applying the same short information transmission period in case of abnormal flow in a normal vehicle flow puts an unnecessary load on the server. .

Third, the wireless communication cost can be reduced. Since the information transmission and reception between the client vehicle and the traffic control center, which is a server, is performed by wireless communication, calculating the optimal information transmission period according to the current traffic situation of the client vehicle can accurately detect traffic conditions on the road while reducing the wireless communication cost. .

As described above, according to the method and apparatus for automatically detecting traffic conditions according to the present invention, the information detected by the client vehicle is automatically processed and stored in a database of a traffic control center, which is a server. Overcoming spatial limitations, the information accumulated in the database of the server can be used as the basic data of various statistical data. In addition, since the client vehicle and the server transmit and receive information in real time, it is easy to track the client vehicle, and in the case of the client vehicle in which the vehicle navigation apparatus is installed, the GPS error can be corrected by receiving a GPS correction value from the server.

Claims (6)

Traffic control center with client vehicle with GPS receiver, vehicle speed A / D converter, standard time manager, vehicle rotation information A / D converter and GIS, map database, property database, traffic information storage and vehicle history information storage A method of automatically detecting a traffic situation by wireless communication between servers, wherein the client vehicle collects traffic information of GPS location information, speed information, time information, and rotation information for each information transmission period, and configures packet information. Step (a); (B) converting the packet information configured in step (a) into a format suitable for wireless communication including TRS or PCS; (C) transmitting the traffic information converted from the format in the step (b) to the mobile communication network by a wireless communication method suitable for the converted format; (D) converting the traffic information transmitted in the step (c) into a packet information format that can be processed by the GIS of the server; (E) the GIS of the server analyzing the packet information converted in the above step and searching for the current position of the client vehicle using the map database and the attribute database; (F) storing the current position of the client vehicle retrieved in the step (e) in a vehicle history information database; (G) analyzing a traffic condition from the traffic information transmitted from the client vehicle and the current location information of the client vehicle retrieved in the step; (H) storing the traffic conditions analyzed in the step (g) in a traffic volume information database; Calculating an information transmission period of the client vehicle from traffic information transmitted from the client vehicle and current position information of the client vehicle retrieved in the step (i); And (j) transmitting the information transmission period of the client vehicle calculated in step (i) to the client vehicle. According to claim 1, If the client vehicle further comprises a vehicle navigation apparatus, GPS error correction value of the client vehicle from the traffic information transmitted from the client vehicle and the current position information of the client vehicle retrieved in the step (e) server Calculating in the; Transmitting the GPS error correction value calculated in the step to the client vehicle; And correcting the GPS error of the vehicle navigation apparatus by using the GPS error correction value transmitted in the step. Automatically detects traffic conditions by wireless communication between a client vehicle equipped with a GPS receiver, a vehicle speed A / D converter, a standard time manager, a vehicle rotation information A / D converter, and a server, a traffic control center equipped with a map database and an attribute database. An apparatus comprising: a DICM, which is a program module for controlling and receiving information from devices of a GPS receiver, a vehicle speed A / D converter, a standard time manager, and a vehicle rotation information A / D converter installed in the client vehicle; A client-side communication module (CM-C) for changing the traffic information packet from the DICM into a format suitable for a characteristic of a wireless communication equipment in use; Client-side wireless communication equipment for transmitting traffic information to a server; Server-side wireless communication equipment for wireless communication with the client vehicle; A server-side communication module (CM-S) for converting traffic information in RCD format from the server-side wireless communication equipment into packet information format; A GIS for analyzing vehicle history information and traffic condition information using information provided from a client and information of a map database and an attribute database; An information transmission period determination unit for determining an information transmission period (DTIT) at which a client transmits information to a server by using the information analyzed by the GIS; And a storage unit for storing the information analyzed by the GIS. According to claim 3, When the client vehicle further comprises a vehicle navigation apparatus, the traffic condition automatic detection device is to determine the GPS error correction value of the GPS receiver on the client side from the vehicle position information analyzed by the GIS Automatic traffic condition detection device characterized in that it further comprises a server-side error correction to calculate. 4. The apparatus of claim 3, wherein the DICM and the client side communication module are implemented as a single chip computer. The apparatus of claim 4, wherein the GIS comprises: a user interface unit that allows an operator of a server to exchange information with the GIS; An interface controller for converting data input through the user interface into a data format that can be processed by a GIS, or converting data of a GIS format into a format that can be output through a user interface; A query processor for processing a query requested from the user interface unit, the server-side communication module, or an information transmission period determination unit; A database manager which performs a function of retrieving data required by the query processor from a database and a function of storing data processed by the query processor in a database; A position analyzer which analyzes the exact position of the vehicle using the geographic position information retrieved from the GIS of the server, the vehicle speed information, and the rotation information of the vehicle using the GPS position received from the client; And a packet information analyzer for analyzing the traffic information packet received from the client and converting the traffic information packet into a form that can be processed by the GIS of the server.