KR101038820B1 - Method for collecting traffic information in Intelligent Transportation System - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a traffic information collection method in an intelligent traffic information collection system.

2. The technical problem to be solved by the invention

The present invention receives the passing time information of the vehicle through the first roadside base station, and the passing time information of the vehicle and the roadside base station collected by the vehicle (vehicle terminal device) through the second roadside base station in a specific section. It aims to provide a traffic information collection method in an intelligent traffic information collection system for receiving traffic time information and collecting traffic information regardless of whether a roadside base station is installed.

3. Summary of Solution to Invention

The present invention relates to a traffic information collection method in an intelligent traffic information collection system, comprising: first passing time information of a vehicle equipped with a vehicle terminal apparatus and entering the communication area of a first roadside station and identification of the first roadside station; Receiving information from the first roadside base station; Receiving second passing time information of the vehicle and identification information of the second roadside base station, which have entered a communication area of a second roadside base station, from the second roadside base station; Receiving, from the second roadside base station, the third passing time information obtained by the vehicle terminal apparatus using pre-stored location information for a predetermined area instead of the communication area of the first and second roadside base stations. ; And collecting traffic information (communication information) for each section by using the first to third passing time information and identification information of each roadside base station.

4. Important uses of the invention

The present invention is used for intelligent traffic information collection system.

Traffic information (communication information), specific area, passing time information, distance error, intelligent traffic information collection system

Description

Traffic information collection method in intelligent traffic information collection system {Method for collecting traffic information in Intelligent Transportation System}             

1 is a diagram illustrating an embodiment of a traffic information collection method in a conventional intelligent traffic information collection system.

2 is a diagram illustrating an embodiment of a traffic information collection method in an intelligent traffic information collection system according to the present invention;

3 is a flowchart illustrating a process of obtaining pass time information of a specific section in the vehicle terminal apparatus according to the present invention;

Figure 4 is a flow diagram of an embodiment of a traffic information collection method in an intelligent traffic information collection system according to the present invention.

* Explanation of symbols for the main parts of the drawings

21: first roadside base station 22: second roadside base station

23: vehicle terminal device 24: information collection server

The present invention relates to a traffic information collection method in an intelligent traffic information collection system, and more particularly, to receive the passing time information of the vehicle through the first roadside base station, the passing time information of the vehicle through the second roadside base station and Traffic information collection method in an intelligent traffic information collection system for receiving traffic time information in a specific section without a roadside base station collected by the vehicle (vehicle terminal device) to collect traffic information regardless of whether the roadside base station is installed It is about.

In the present invention, the first roadside base station has a specific zone without a roadside base station between a previous roadside base station located before the first roadside base station and the first roadside base station based on the direction in which the vehicle (vehicle terminal device) proceeds. If not, it means a base station that the vehicle communicates as the vehicle progresses, and the second roadside base station is a roadside base station between the first roadside base station and the second roadside base station based on the direction in which the vehicle (vehicle terminal device) proceeds. When there is a specific area that does not exist means a base station that the vehicle communicates as it proceeds.

Intelligent Transportation Systems (ITS), which has recently attracted worldwide attention, is designed to facilitate and automate the flow of traffic and increase driver comfort and safety through the detection and control of overall traffic conditions. Aim. When such an ITS is effectively constructed, direct savings of hundreds of billion won can be expected every year by reducing transportation efficiency due to traffic congestion, waste of energy, air pollution, and waste of production time due to increased driving time.

In addition, ITS provides a variety of services to help drivers enjoy driving more safely and comfortably. For example, it automatically controls traffic lights according to traffic flows and informs drivers of driving information (road congestion, construction and regulatory conditions, weather, parking lot information, etc.) or delays to their destinations. It guides you in real time the shortest route according to road traffic information so that you can avoid it.

In addition, the ITS can automatically manage the fare, eliminating the need to stop / slow at the fare clearing station and efficiently manage the operation of commercial vehicles and public transportation vehicles. In addition, ITS also alerts you to the risk of collisions and obstacles ahead and back for safe operation.

In order to provide such various services, collecting traffic information must be preceded first.

Here, a method of collecting traffic information (for example, section-specific traffic information) in a conventional intelligent traffic information collection system will be described with reference to FIG. 1.

As shown in FIG. 1, a plurality of roadside base stations 11 are installed in areas A, B, and C to collect traffic information by communicating with a vehicle 12 equipped with a vehicle terminal device. When the vehicle 12 equipped with the vehicle terminal device enters the communication area of each roadside base station 11, each roadside station station 11 enters information on the entry time (passing time) of the vehicle 12 equipped with the vehicle terminal device and the self. The identification information (identifier value) of the information collection server 13 is transmitted in real time. Then, the information collection server 13 uses the identification information of each roadside station 11 received from each roadside station 11 and the passing time information of the vehicle 12 to obtain the communication information of the vehicle 12 for each section. Collect.

In more detail, for example, as the current vehicle 12 enters the communication area of the roadside base station 11 located in the C area, it communicates with the roadside base station 11 located in the C area. Let's say that the time is 13 o'clock. Then, the roadside base station 11 located in the region C transmits the current time information (13 o'clock) and its identification information to the information collection server (13).

Thereafter, the vehicle enters the communication area of the roadside base station 11 located in the B area through the C area, and communicates with the roadside base station 11 located in the B area. Let's say the time at this time is 13:10. Then, the roadside base station 11 located in the area B transmits the current time information (13:10) and its identification information to the information collection server 13.

Thereafter, the vehicle enters the communication area of the roadside base station 11 located in the A area through the B area, and communicates with the roadside base station 11 located in the A area. Let's say the time at this time is 13:20. Then, the roadside base station 11 located in the area A transmits the current time information (13:20) and its identification information to the information collection server 13.

Then, the information collection server 13 identifies each of the fireside base stations 11 received from the fireside base station 11 located in the C area, the fireside base station 11 located in the B area, and the fireside base station 11 located in the A area. Using the information and the passing time information of the vehicle collects the vehicle traffic information (10 minutes) of the current CB section and BA section.

However, the traffic information collection method of the conventional intelligent traffic information collection system can only collect the traffic information of the vehicle in the area where the roadside base station is installed, and collect the traffic information of the vehicle in the section where the roadside base station is not installed. There is no problem.

In addition, the conventional traffic information collection method has a problem that a separate roadside base station must be installed in order to collect the traffic information of the vehicle in a short section between the roadside base station is already installed.

In addition, the conventional traffic information collection method has a problem that a large cost is required to install a roadside base station for collecting the traffic information of the vehicle.

The present invention has been proposed to solve the above problems, and receives the passing time information of the vehicle through the first roadside base station, the passing time information of the vehicle through the second roadside base station and the vehicle (vehicle terminal device) The purpose of the present invention is to provide a traffic information collection method in an intelligent traffic information collection system for collecting traffic information regardless of whether a roadside base station is installed by receiving the passing time information in a specific section without the collected roadside base station. .

The method of the present invention for achieving the above object is, in the traffic information collection method in the intelligent traffic information collection system, the first passing time information of the vehicle equipped with the vehicle terminal device, which enters the communication area of the first roadside station; Receiving identification information of the first roadside base station from the first roadside base station; Receiving second passing time information of the vehicle and identification information of the second roadside base station, which have entered a communication area of a second roadside base station, from the second roadside base station; Receiving, from the second roadside base station, the third passing time information obtained by the vehicle terminal apparatus using pre-stored location information for a predetermined area instead of the communication area of the first and second roadside base stations. ; And collecting traffic information (communication information) for each section by using the first to third passing time information and identification information of each roadside base station.

The present invention provides a passing time information according to the position information obtained by the vehicle terminal device in conjunction with a GPS (Global Positioning System) satellite by using a vehicle terminal device that previously stores position information of a specific section without a roadside base station. It is characterized by collecting through the roadside base station to collect the communication information of the vehicle without the installation of the roadside base station in the specific section.

The above-mentioned objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating an embodiment of a traffic information collection method in an intelligent traffic information collection system according to the present invention.

As shown in FIG. 2, the first roadside base station 21 and the second roadside base station 22 for collecting communication information by communicating with the vehicle 23 equipped with the vehicle terminal apparatus are zones C and A, respectively. Installed in At this time, the traveling direction of the vehicle 23 is the direction of the A zone from the C zone.

Here, the first roadside base station 21 refers to a base station collecting the passing time information of the vehicle 23, the second roadside station 22 is the passing time information of the vehicle 23 and the vehicle of the vehicle 23 The base station collects passing time information in a specific section in which the roadside base station stored by the payload device does not exist. Therefore, if the vehicle 23 stores the passing time information acquired in the previous zone (zone without a roadside station) before arriving at zone C, the first roadside base station 21 also functions like the second roadside station 22. Do it.

In more detail, when the vehicle 23 enters the communication area of the first roadside base station 21, the first roadside station 21 communicates with the on-vehicle device of the vehicle 23 to obtain current time information. To the information collection server 24 along with its identification information.

Then, when the vehicle 23 enters the zone B, the vehicle terminal device mounted on the vehicle 23 acquires the passing time of the zone B in cooperation with the GPS satellite. That is, the vehicle terminal device continuously receives its location information from the GPS satellites. Then, when the distance error between the position information received and the position information in the specific area stored is less than the threshold value, the passing time at this time is stored. Here, the process of acquiring the passing time information in the zone B by the vehicle terminal device mounted on the vehicle 23 will be described in more detail later with reference to FIG. 3.

Thereafter, when the vehicle 23 enters the zone A, the second roadside base station 22 communicates with the vehicle mounting apparatus of the vehicle 23 so that the current time information and the previous zone (the specific area where the roadside station does not exist) are transmitted. The passing time of the information is obtained and transmitted to the information collection server 24 with its identification information.

Then, the information collection server 24 collects vehicle traffic information for each zone by using the passing time information in each zone.

In one embodiment of the present invention, for the sake of easier understanding, only one specific zone (zone without a roadside base station) is described, but the number does not affect the present invention. However, as the distance between the roadside base stations increases, the time taken for the information collection server 24 to receive traffic information increases, which results in a delay in updating the traffic information. Therefore, the distance between roadside base stations should be adjusted according to the importance of traffic information and priority of cost.

Further, the present invention can be applied to obtaining communication information of not only vehicles moving at arbitrary positions, but also buses traveling on predetermined routes. For example, assuming a total of 10 zones (zones A to J) on which the bus runs, install a roadside base station in zones A, D, G, and J, and a roadside base station in the remaining zones. Without storing the location information of each zone in the vehicle terminal device.

Then, it receives the passing time of the bus from the roadside base station located in the zone A, receives the passing time of the zone B, the passing time of the zone C and the passing time of the zone D from the roadside base station located in the zone D, and from the roadside station located in the zone G. Receives zone E pass time, zone F pass time and zone G pass time. In addition, it is possible to collect traffic information (communication information) for the entire zone from the roadside base station located in the J zone by receiving the H zone passage time, the I zone passage time, and the J zone passage time.

3 is a flowchart illustrating a process of obtaining pass time information of a specific section in the vehicle terminal apparatus according to the present invention.

First, the storage unit of the vehicle terminal device stores location information of a specific area (area where no roadside base station exists) (301).

Subsequently, as the vehicle equipped with the vehicle terminal apparatus proceeds, current position information is received from the GPS satellites at a predetermined period and the distance error is calculated by comparing with the position information stored in the storage unit of the vehicle terminal apparatus (302 and 303). . At this time, the process of calculating the distance error is as shown in Equation 1 below.

는 i번째 지점 위치 데이터,

는 GPS 측정 데이터를 의미한다. 따라서, 거리 오차(d)가 0일 때, 특정 구역의 위치와 현재 위치가 일치하게 된다. Where d is the distance error,

Is the i point location data,

Means GPS measurement data. Therefore, when the distance error d is 0, the position of the specific zone coincides with the current position.

Then, it is checked whether the calculated distance error is less than or equal to the threshold (304).

As a result of the check 304, if the calculated distance error is less than or equal to the threshold, the current time information is stored.                     

In this manner, even when there is a plurality of location information, the passing time information according to the location information is sequentially stored and transmitted to the information collection server 24 through the roadside base station to be communicated later.

4 is a flowchart illustrating a traffic information collecting method in an intelligent traffic information collecting system according to the present invention.

First, the information collection server 24 is the current passing time information and the first pass through the first roadside base station 21 as the vehicle 23 equipped with the vehicle terminal device enters the communication area of the first roadside base station 21. The identification information of the roadside base station 21 is received (401).

Subsequently, as the vehicle 23 enters the communication area of the second roadside base station 22, the vehicle 23 receives current passing time information, identification information of the second roadside base station 22, and passing time information obtained in a specific area ( 402).

Subsequently, the information collection server 24 uses the passing time information received through the first roadside base station 21 and the second roadside base station 22 and the traffic information for each section (identification information). ) Is collected (403).

The present invention allows traffic information to be collected even in a region without a roadside base station through the above process.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, the road station base station through the passing time information according to the position information obtained by the vehicle terminal device in conjunction with the GPS satellites using a vehicle terminal device that pre-stores the location information of a specific section without the roadside base station By collecting through, it is effective to collect the communication information of the vehicle without the installation of the roadside base station in the specific section.

Claims (2)

In the traffic information collection method in the intelligent traffic information collection system, Receiving first passing time information of the vehicle equipped with the vehicle terminal apparatus and identification information of the first roadside base station from the first roadside base station, which has entered the communication area of the first roadside base station; Receiving second passing time information of the vehicle and identification information of the second roadside base station, which have entered a communication area of a second roadside base station, from the second roadside base station;  Receiving, from the second roadside base station, the third passing time information obtained by the vehicle terminal apparatus using pre-stored location information for a predetermined area instead of the communication area of the first and second roadside base stations. ; And Collecting traffic information (communication information) for each section by using the first to third passing time information and identification information of each roadside base station; Traffic information collection method in an intelligent traffic information collection system comprising a. The method of claim 1, The third passing time information, Traffic information collection method in the intelligent traffic information collection system, characterized in that the passing time information when the distance error between the pre-stored position information and the position information of the vehicle terminal device according to the GPS is less than the threshold value.

Images