KR20180101783A - Road management system based on public hotspot accesspoint handover - Google Patents

Abstract

The present invention generally relates to a technology for setting up a public hot spot by installing a plurality of wireless LAN access points along a road (e.g., a highway) and controlling the road through road information obtained therefrom. More specifically, the present invention relates to a road management technology. Multiple wireless LAN access points are separately installed along a road and public hotspots are set along the road. After that, terminal devices mounted in a vehicle running on the road performs wireless LAN communication with the wireless LAN access points through AP handover. In this wireless LAN communication process, a road management server connected to a broadband network and the plurality of wireless LAN access points collect and manage information related to the corresponding road, thereby realizing various services.

Description

[0001] Public hotspot [0002] An AP handover-based road control system is based on public hotspot access point handover

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to technology for setting up public hotspots by installing a plurality of wireless LAN access points along roads (e.g., highways) and controlling roads through road information obtained therefrom.

More particularly, the present invention relates to a method and apparatus for setting up a public hot spot along a road by installing a plurality of wireless LAN access points along a road, and then terminal devices mounted on a vehicle traveling on the road, The wireless LAN access point and the wireless LAN communication are performed. In this wireless LAN communication process, the road management server connected to the plurality of wireless LAN access points and the broadband network collects information related to the corresponding roads and integrates them to implement various services It is about road control technology that can be used.

As the number of vehicles is rapidly increasing and the culture of using vehicles has become generalized, the amount of traffic on the roads has greatly increased. The government and municipalities are constantly expanding the roads, but the traffic volume is growing at a much faster rate, so the road traffic situation is not improving.

Therefore, there has been an effort to smartly use roads by finding information on road conditions and utilizing them, considering that the problem of solving traffic problems is physically enlarged or newly established.

Conventionally, when a large number of CCTV cameras are installed on a major road base, images of the roads are captured and collected by the control server, the control personnel views the CCTV images of these roads and determines the road conditions. The control officer understands how the roads of each branch are stagnant from the CCTV images of the roads and provides the information through traffic broadcasts or internet sites. In addition, it can be applied to the navigation of the vehicle by linking with the navigation service.

However, the traffic situation information processing technique in the related art is basically based on the CCTV image, so that there is a problem that the amount of data is too large. In order to process such a large amount of image information, it requires a powerful processing capability, thereby failing to perform a complete computer processing and having a large dependency rate on the control personnel, failing to ensure consistency and reliability of data processing.

Also, in spite of analyzing such a large amount of data, the conventional technology can obtain general information about the road, and can not analyze detailed information about individual vehicles. Accordingly, in the prior art, the average speed of each road is detected and utilized for navigation service, or the control personnel can not provide the service to detect the accident or the breakdown vehicle of the CCTV image, and to notify the related agency.

It is an object of the present invention to provide a technology for setting a public hot spot by installing a plurality of wireless LAN access points along a road (e.g., a highway) and controlling the road through road information obtained therefrom.

In particular, it is an object of the present invention to provide a wireless hotspot, in which a plurality of wireless LAN access points are spaced apart along a road to set public hot spots along the road, and terminal apparatuses mounted in the vehicle, The wireless LAN communication with the LAN access point is performed. In this wireless LAN communication process, a plurality of wireless LAN access points and a road control server connected to the broadband network collect and manage information related to the corresponding roads, To provide road management technology.

In order to accomplish the above object, the present invention provides a wireless communication system including a plurality of wireless LAN accesses installed along a road for setting a public hot spot along a road for communicating with a plurality of vehicle- Point 100 and a public hotspot AP handover-based road control system using a plurality of wireless LAN access points and a road control server 200 connected to a broadband network, The public hotspot is provided, and as the vehicle travels, wireless LAN communication is sequentially performed with the vehicle-mounted terminals through the AP handover in accordance with the installation order on the road, and wireless LAN communication is performed with respect to a plurality of vehicle- Collects the terminal identification information and the wireless communication characteristic information, When the alarm provides identification target selection and a plurality of wireless LAN access point 100 that provides the information of the selected vehicle specific to the terminal traveling within the respective coverage of the valid response to the type of the specific driving; The road running status information database is constructed by receiving the vehicle terminal identification information and the wireless communication characteristic information for a plurality of vehicle-mounted terminals from the plurality of wireless LAN access points, and arranging the road running status information on the basis of the vehicle terminal identification information And a road control server 200 for identifying the specific driving vehicle according to a predetermined reference from the driving state information for each vehicle and providing the identified driving vehicle to the wireless LAN access point.

In the present invention, a plurality of wireless LAN access points 100 are connected to a plurality of vehicle-mounted terminals through a Wi-Fi direct connection, and a plurality of wireless LAN access points 100 are similarly set in advance with specific terminal names, The WLAN access point 100 can detect and connect to the WLAN access point in the device search for Wi-Fi direct even if the effective coverage continuously changes according to the traveling. The WLAN access point 100 requests Wi-Fi direct connection as a group owner for Wi- It is preferable that the terminal is automatically configured to process the user authentication.

In addition, the road control server 200 identifies a wireless LAN access point (hereinafter referred to as " specific wireless LAN AP ") that provides effective coverage to a specific driving vehicle, The wireless LAN access point 100 provides the identification information of the generated wireless LAN access point 100. When the wireless LAN access point 100 receives the identification information of the specific wireless LAN access point 100, And provide it to the vehicle-mounted terminal within its effective coverage.

The road control server 200 also arranges the wireless communication characteristic information in time order on the basis of the vehicle terminal identification information from the road running state information database and displays the running state of each vehicle on the road based on the variation pattern graph of the wireless communication characteristic information It is desirable to obtain information.

In the present invention, it is preferable that a plurality of wireless LAN access points 100 are configured to perform wireless LAN communication in common with vehicle-mounted terminals 300 of vehicles that are installed at a central separation point of a road and run in both directions of the road Do.

In the present invention, the road control server 200 analyzes the running state information of each vehicle to detect a combination of the intermittent swaying type running characteristic and the dominant speed dependent running characteristic in the running state information of the specific vehicle, And can provide a drowsy driving alarm message to the wireless LAN access point.

Also, the road control server 200 analyzes the running state information of each vehicle to detect a problem suspicious vehicle showing a deviation of a predetermined threshold value or more in comparison with other vehicles belonging to the same wireless LAN access point, It is possible to provide information corresponding to the position of the suspected vehicle.

According to the present invention, the road control server collects real-time information related to the road through public hot spots formed along the road and integrates and manages it, thereby realizing services such as drowsiness driving monitoring, traffic accident occurrence monitoring, traffic rule violation monitoring, and ambulance traffic There are advantages to be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram conceptually showing the overall configuration of a public hotspot AP handover-based road control system according to the present invention. FIG.
FIG. 2 illustrates a configuration in which AP handover is performed based on Wi-Fi direct in the present invention. FIG.
3 is a diagram showing a configuration for acquiring vehicle running status information from a variation pattern graph of wireless communication characteristic information in the present invention.
4 is a flowchart showing an example of a process in which a road control server monitors a drowsiness operation in the present invention.
5 is a flowchart showing an example of a process of monitoring a suspected vehicle by a road control server in the present invention.
6 is a flowchart showing a first embodiment in which a road control server propagates information of a specific traveling vehicle to a wireless LAN access point in the present invention.
7 is a flowchart showing a second embodiment in which a road control server propagates information of a specific traveling vehicle to a wireless LAN access point in the present invention.
8 is a flowchart showing a third embodiment in which a road control server propagates information of a specific traveling vehicle to a wireless LAN access point in the present invention.

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

1 is a view conceptually showing the overall configuration of a public hotspot AP handover-based road control system according to the present invention. The road control system according to the present invention uses a plurality of wireless LAN access points 100 that are installed along a road and set up a public hot spot and a road control server 200 connected to the plurality of wireless LAN access points and a broadband network.

First, a plurality of wireless LAN access points 100 are spaced apart from each other by a certain distance along a road. The wireless LAN access point 100 is a facility for providing a public hot spot along the road, whereby the vehicle traveling on the road becomes a state capable of wireless LAN communication. At this time, although the wireless LAN access point 100 may be installed near the shoulder roads on both sides of the road, it is difficult to install the wireless LAN access point 100 in the vicinity of the center separator 401 of the road, As shown in Fig.

The vehicle-mounted terminal 300 having the wireless LAN communication function is provided for each of the vehicles 501 and 502 and the vehicles 501 and 502 running on the road are connected to the wireless LAN access point 100 covering the point, Respectively. 1 shows effective coverage (CV # 1 to CV # 3) formed by the respective wireless LAN access points (AP # 1 to AP # 3) slightly overlapping each other. The present invention is not limited to this configuration. The WLAN access points 100 may be installed closer together so that the effective coverage overlaps more or may be installed as far as the effective coverage does not overlap as in the next [Figure 2].

When the vehicles 501 and 502 travel on the road, the terminals on the vehicle and the wireless LAN access point 100 perform wireless LAN communication sequentially through the AP handover in accordance with the installation order on the road. Referring to the right lane of FIG. 1, at time t11, wireless LAN communication with the wireless LAN access point AP # 1 is performed. As the vehicle 501 travels on the road, the vehicle 501 moves at time t12 And performs wireless LAN communication with the wireless LAN access point AP # 2. In the middle, handover occurs between the two wireless LAN access points AP # 1 and AP # 2. Similarly, at time t13, the vehicle 501 performs wireless LAN communication with the wireless LAN access point AP # 3, and a handover occurs between the wireless LAN access points AP # 2 and AP # 3 in the middle of the communication.

The wireless LAN access point 100 collects the vehicle terminal identification information and the wireless communication property information for each of the vehicle-mounted terminals 300 while performing the wireless LAN communication. First, the vehicle terminal identification information of the vehicle-mounted terminal 300 is collected to distinguish the vehicle passing through the hot spot. Although the vehicle terminal identification information is strictly information for identifying the vehicle-mounted terminal 300, since the vehicle-mounted terminal 300 is installed in the vehicle 501, there is also a function of actually identifying the vehicle.

In addition, wireless communication characteristic information is collected to know spatial characteristics between the wireless LAN access point 100 and the vehicle 501. Examples of the wireless communication characteristic information include a wireless LAN parameter related to a wireless LAN communication environment such as RSSI (Received Signal Strength Indication), an MCS index (Modulation and Coding Index), PHY RATE (Physical Layer Rate) (Physical measurement bandwidth), NOISE (noise level), SNR (signal to noise ratio), and signal to noise ratio (SNR). For the purposes of the present invention, RSSI values are considered to be most effective among these wireless LAN parameters.

Each wireless LAN access point 100 collects vehicle terminal identification information and wireless communication property information for vehicles passing through the wireless LAN hotspot formed therein, and then transmits the information to the road control server 200 through the network . For the purpose of the present invention, it is preferable that the information is collected and transmitted in real time and analyzed by the road control server 200 in real time.

In addition, the wireless LAN access point 100 may receive identification information on the specific driving vehicle from the road control server. And that the specific vehicle in the wireless LAN hotspot is informed that something is unusual. On the other hand, the wireless LAN access point 100 selects an alarm object corresponding to the type of the specific driving and provides specific driving information to the selected vehicle mounted terminal 300 in its effective coverage. That is, depending on the type of the specific driving, the information may be provided to the driver of the vehicle, or information may be provided to the driver of another vehicle in the vicinity of the specific driving vehicle.

The road control server 200 receives the vehicle terminal identification information and the wireless communication characteristic information for a plurality of vehicle-mounted terminals 300 from the plurality of wireless LAN access points 100 through the network, Establish a database of road traffic information.

Then, in order to grasp the traveling mode on the basis of the individual vehicle, the road control server 200 arranges the road running status information on the basis of the vehicle terminal identification information to obtain the running status information per vehicle. That is, it extracts information about how the individual vehicle is traveling on the current road. The road control server 200 identifies the specific driving vehicle according to a preset reference from the driving state information for each vehicle and provides it to the wireless LAN access point.

The specific driving vehicle derived from the road running status information database by the road control server 200 will be described later in detail.

2 is a diagram illustrating a configuration in which AP handover is performed based on Wi-Fi direct in the present invention.

In the present invention, the wireless LAN access point 100 forms a wireless LAN hot spot and the vehicle-mounted terminal 300 installed in the vehicle 501 passing through the wireless LAN access point 100 transmits the wireless LAN access point AP # . When the vehicle 501 travels to the next point, the wireless LAN connection with the wireless LAN access point AP # 1 responsible for the previous point is disconnected and the wireless LAN connection with the wireless LAN access point AP # Handover occurs.

It is preferable that the wireless LAN connection between the wireless LAN access point 100 and the in-vehicle terminal 300 is connected with WiFi Direct so that such an operation can be effectively performed. When the WLAN access point 100 and the vehicle-mounted terminal 300 are connected by Wi-Fi direct, the vehicle 501 passes through a plurality of WLAN hot spots as the vehicle 501 travels on the road There is an advantage that the vehicle-mounted terminal 300 stably maintains the wireless LAN connection with the wireless LAN access point 100. [

With the widespread adoption of wireless LAN technology, there are many free hotspots available, and vehicle passengers may have turned on mobile hotspots on their smartphones. As such, besides the public hotspot according to the present invention, other free hotspots may be provided around the vehicle-mounted terminal 300. When the wireless LAN connection is temporarily disconnected in the course of transiting the wireless LAN hotspot area, the vehicle-mounted terminal 300 searches for the wireless LAN access point 100 at the next point without being connected to other wireless LAN hotspots in the vicinity, I do not know.

According to the current technical specifications, Wi-Fi Direct uses "DIRECT" as the default service set (SSID). Therefore, in FIG. 2, the SSIDs of the wireless LAN hotspots formed by the wireless LAN access point 100 are all "DIRECT".

The vehicle-mounted terminal 300 continuously changes the effective coverage as the vehicle 501 travels on the road. In this process, the connection with the wireless LAN access point 100 in the previous area is disconnected. In Wi-Fi Direct technology, when the wireless LAN connection is cut off, it tries to recover the previous wireless LAN connection for a certain period of time. At this time, the in-vehicle terminal 300 searches for a Wi-Fi direct connection partner based on the 'terminal name'. In consideration of this point, in the present invention, a plurality of wireless LAN access points 100 are similarly set in advance with a specific terminal name, e.g., "APNE ". Accordingly, even if the in-vehicle terminal 300 continuously transitions the effective coverage according to the driving of the road, the wireless LAN access point 100 of the next area is discovered and connected in the device search for Wi-Fi direct.

In addition, in the wireless LAN communication technology, it is general that the wireless LAN communication is configured to be determined by a user operation when setting a wireless LAN connection between specific devices. One of the two parties is a group owner. When a terminal that is not a group owner requests a wireless LAN connection to a terminal that is a group owner and a group owner terminal After confirming the user's intention through the screen button, the wireless LAN connection is established.

In the present invention, the wireless LAN connection between the wireless LAN access point 100 and the vehicle-mounted terminal 300 must be always performed without intervention of a user or an administrator. For this purpose, the WLAN access point 100 must be programmed in advance so that the group owner can always be a group owner for the Wi-Fi direct connection in the group owner negotiation procedure of the wireless LAN connection process.

When the wireless LAN access point 100 becomes a group owner of the Wi-Fi direct connection, the wireless LAN access point 100 automatically authenticates the vehicle-mounted terminal 300 according to the present invention requesting a Wi-Fi direct connection . In order to prevent hacking, it is desirable to confirm the qualification according to the present invention for a device requiring a Wi-Fi direct connection, and a certificate according to the public encryption technique can be preferably used.

3 is a diagram showing a configuration in which the road control server 200 extracts running state information for a specific vehicle based on a variation pattern graph of wireless communication characteristic information in the present invention. That is, the road control server 200 arranges the wireless communication characteristic information in time order on the basis of the vehicle terminal identification information from the road running state information database, and displays the running state of each vehicle on the road based on the variation pattern graph of the wireless communication characteristic information Obtain information.

3 (a) is a graph of a variation pattern for a vehicle traveling at a constant speed of about 80 km / h. When the vehicle approaches each access point, RSSI (Received Signal Strength Indication) is maximized and RSSI is minimized near the handover point. The fact that the driving speed of the vehicle is constant can be derived from the fact that the graph shape is constant, and it can be deduced from the fact that the minimum value and the maximum value of the RSSI are constant, and therefore the vehicle travels while maintaining the same lane.

Next, Fig. 3 (b) is a variation pattern graph for a vehicle traveling at 130 km / h while driving the road at a speed of about 80 km / h. The fact that the speed of the vehicle has risen can be derived from the fact that the period in which the WLAN access point appears is shortened. In addition, it can be deduced from the fact that the RSSI value has increased, that the vehicle has changed the lane in the direction approaching the wireless LAN access point, that is, in Fig. 1.

Next, FIG. 3 (c) is a graph of a variation pattern for a vehicle that rushes the road at a speed of about 95 km / h, and suddenly suddenly reduces the speed suddenly and moves to the outside of the road. It is possible to derive that the vehicle speed has decreased from the point at which the wireless LAN access point appears, and it can be seen from the point where the RSSI value has decreased that the vehicle is moving away from the wireless LAN access point, It can be deduced that it has changed. If a vehicle driving on a highway shows this fluctuating pattern graph, it is probable that the vehicle has stopped due to a fault.

Next, [Fig. 3] (d) is a variation pattern graph for a vehicle driving a road at a speed of about 80 km / h, changing the speed of the vehicle to 170 km / h while changing the lane. It can be deduced that the vehicle suddenly accelerates from the point where the wireless LAN access point appears suddenly shortened, and that the RSSI value is increased or decreased, and that the vehicle has been changed back and forth. This is a pattern that indicates abrupt driving.

As described above, the road control server 200 can grasp the actual how the individual vehicle actually travels on the road based on the variation pattern graph of the wireless communication characteristic information. The variation pattern graph of the wireless communication characteristic information is transmitted to the road control server 200 after the wireless LAN access point 100 collects the wireless LAN communication while performing the wireless LAN communication.

4 is a flowchart illustrating a process in which the road management server 200 monitors the presence of a vehicle driving a sleeping vehicle on the road and provides a measure to awaken a sleeping vehicle immediately when a sleeping driving vehicle is detected.

Step S110: First, the road management server 200 analyzes the running status information of each vehicle for a plurality of vehicles running on the road. The running status information reflects the mode in which each vehicle actually runs on the road. The road control server 200 analyzes the running status information by vehicle and analyzes the running characteristics of each vehicle as shown in FIG.

Step S120: As a result of analyzing the running status information, the road control server 200 detects a combination of the intermittent running characteristic and the dominant speed dependent running characteristic with respect to the specific vehicle. For example, at 95% of the time, you will find a vehicle that appears to run safely while maintaining a constant speed, but exhibits a staggering staggering pattern.

Steps S130 and S140: The road control server 200 suspects or estimates that the vehicle showing such driving characteristics is in the drowsy driving state. Accordingly, the vehicle is identified as a specific driving vehicle, and a sleep driving alarm message is provided to the wireless LAN access point 100 associated with the vehicle. For example, in FIG. 1, when the vehicle with such running characteristics is found in the wireless LAN coverage CV # 2, the road control server 200 provides a sleep driving alarm message to the wireless LAN access point AP # 2.

Steps S150 and S160: Upon receiving the drowsy driving alarm message from the road control server 200, the wireless LAN access point 100 delivers a drowsy driving alarm message to the vehicle mounted terminal 300 installed in the vehicle.

Accordingly, the vehicle-mounted terminal 300 reproduces and outputs the drowsy driving alarm message to the driver in the form of, for example, a wake-up sound and a rest induction command, so that the drowsy driving operation can be immediately performed.

5 is a flowchart illustrating a process of monitoring the presence of a suspected vehicle in the road management server 200 and causing a road management system to respond to a suspected vehicle when the road management server 200 detects a suspected vehicle. In the present specification, a suspected vehicle is basically a term including a vehicle that violates a traffic rule such as speeding, abrupt driving, signal violation, violation by a bus lane, and the like. A suspected vehicle is also a term that includes a vehicle that suddenly breaks down while driving on the road.

Step S210: First, the road management server 200 analyzes the running status information of each vehicle for a plurality of vehicles running on the road. The running status information reflects the mode in which each vehicle actually runs on the road. The road control server 200 can analyze driving characteristics of each vehicle by analyzing the running state information by vehicle classification.

Step S220: Next, the road control server 200 classifies the running status information for each vehicle by the wireless LAN access points 100. [ That is, a number of vehicles are grouped into individual WLAN coverage units that they currently belong to, which is to compare the driving characteristics of the vehicles within each group.

Step S230: Next, the road control server 200 compares the traveling characteristics of the vehicles belonging to the same wireless LAN access point 100 with respect to each wireless LAN access point 100 to each other. As a result, in the same wireless LAN access point 100, a problem suspicious vehicle that shows a deviation of more than a predetermined threshold value in comparison with other vehicles in comparison with the other vehicles is detected.

Each wireless LAN access point 100 forms a wireless LAN coverage, considering that the size of the wireless LAN coverage ranges from a few tens of meters to several tens of meters in diameter, the traffic flow of the road is roughly uniform .

As a result, the vehicles belonging to the same WLAN access point 100 are expected to exhibit similar traveling characteristics. For example, the speed of the vehicle, the speed of the vehicle, the speed of the vehicle, and the degree of change of the vehicle are generally similar to each other. Therefore, a vehicle showing a driving mode significantly different from other vehicles belonging to the same wireless LAN access point 100 is a vehicle suspected of having a problem.

For example, it may be a traffic violation vehicle such as speeding, abusive driving, signal violation, violation by bus lane, etc., and may be a vehicle that requires immediate intervention. It is also possible that there is something in the road that has stopped and stalled, or that the vehicle is in need of immediate assistance.

Step S240, S250: The road control server 200 transmits corresponding information capable of identifying the location of the suspicious vehicle, for example, the suspicious vehicle to the wireless LAN access point 100 The identification information is extracted and provided to an external road management system (for example, police, insurance company).

Thus, in the road management system, a management vehicle (for example, a police car, an insurance vehicle) is dispatched to the point to check the suspected vehicle.

6 is a flowchart showing a first embodiment in which information is transmitted to a plurality of wireless LAN access points 100 installed on the road when the road control server 200 discovers a specific driving vehicle in the present invention.

Step S310: First, the road control server 200 identifies the wireless LAN access point 100 which is currently providing valid coverage for the specific driving vehicle. A plurality of wireless LAN access points 100 installed on the road collect vehicle terminal identification information and wireless communication property information for vehicles existing in respective wireless LAN coverage and upload them to the road control server 200 in real time do.

Therefore, the road control server 200 can estimate that the vehicle belongs to the wireless LAN coverage of the wireless LAN access point 100 that lastly uploaded the vehicle terminal identification information and the wireless communication characteristic information to the specific driving vehicle . In this specification, a wireless LAN access point 100 that currently provides effective coverage for a specific driving vehicle is referred to as a " unusual wireless LAN AP " for convenience's sake.

Here, for convenience of description, it is assumed that the wireless LAN access point AP # 3 is a specific wireless LAN AP in FIG. 1 and will be described below. In consideration of the fact that the vehicle can move at a high speed depending on the implementation method, it is possible not to set only one specific wireless LAN AP, but to bundle several nearby wireless LAN APs. For example, the three wireless LAN access points AP # 2 to AP # 4 may be set as the specific-occurring wireless LAN AP.

Step S320: The road control server 200 transmits the identification information of the specific traveling vehicle to the specific-occurring wireless LAN AP and an abnormal warning message.

Step S330: The specific wireless LAN AP (for example, AP # 3) refers to the provided vehicle identification information, identifies the specific driving vehicle among the vehicles in its effective coverage, And identifies the wireless LAN connection with the vehicle-mounted terminal 300 installed in the traveling vehicle.

Step S340 and step S350: The specific-occurring wireless LAN AP (e.g., AP # 3) transmits an abnormal warning message to the corresponding vehicle-mounted terminal 300, and the vehicle-mounted terminal 300 transmits an abnormal warning message to the alarm Sound or an exemplary driving inducement to the driver so as to induce normal driving.

7 is a flowchart showing a second embodiment of propagating the information to a plurality of wireless LAN access points 100 installed on the road when the road control server 200 finds a specific traveling vehicle in the present invention.

Step S410: First, the road control server 200 identifies the approximate area to which the specific driving vehicle belongs. For example, it is identified as Gyeongbu Expressway and Gyeongbu Expressway.

Step S420: The road control server 200 transmits the identification information of the specific driving vehicle and the warning message to the plurality of wireless LAN access points belonging to the corresponding area, for example, 300 wireless LAN access points. One of the wireless LAN access points (e.g., AP # 3) among the plurality of wireless LAN access points is performing wireless LAN communication with the specific driving vehicle.

Step S430: A plurality of wireless LAN access points confirm whether a specific driving vehicle exists in its effective coverage. The wireless LAN access point performs wireless LAN communication with the vehicle-mounted terminal 300 and collects information that can identify the vehicle. Preferably, the identification information of the specific driving vehicle provided by the road control server 200 is also selected from the collected information and has the same format as the collected identification information. Therefore, each wireless LAN access point can confirm whether or not there is a specific driving vehicle that the road control server 200 informs within its effective coverage.

Step S440: As a result of the confirmation, the wireless LAN access point which has determined that the specific driving vehicle does not exist in its own effective coverage is ignored because it is irrelevant to the wireless LAN access point itself.

Steps S450 to S470: Conversely, as a result of the confirmation, the wireless LAN access point, which has determined that the specific driving vehicle exists in its own effective coverage, performs the wireless LAN connection with the vehicle-mounted terminal 300 installed in the specific driving vehicle And transmits an abnormal warning message to the vehicle-mounted terminal 300 after identification. The vehicle-mounted terminal 300 reproduces an abnormal warning message to the driver in the form of an alarm sound or an exemplary driving inducement, thereby inducing normal operation.

FIG. 8 is a flowchart showing a third embodiment in which, when the road control server 200 finds a specific driving vehicle, the information is propagated to a plurality of wireless LAN access points 100 installed on the road in the present invention.

Step S510: First, the road control server 200 identifies a specific occurrence wireless LAN AP currently providing effective coverage for a specific driving vehicle, as described above with reference to step S310. In the third embodiment, the identification of the specific occurrence wireless LAN AP corresponds to the way that the road control server 200 grasps the current geographical position of the specific traveling vehicle.

Step S520: The road control server 200 provides identification information of a specific wireless LAN access point to other wireless LAN access points disposed in the vicinity of the specific wireless LAN access point AP. For example, identification information of a specific WLAN AP is provided to several WLAN access points belonging to the same administrative area (eg, Gijung-gu) or the construction area of a specific WLAN AP.

Referring to FIG. 1, the wireless LAN access points AP # 1 and AP # 2 are located in front of the wireless LAN access point AP # 3 with respect to the traveling direction shown on the right. The traveling direction of the specific traveling vehicle can be identified from the passing sequence of the wireless LAN access point, so that the traveling direction can be referred to.

Step S530: Accordingly, a plurality of wireless LAN access points 100 disposed in the vicinity of the specific-occurring wireless LAN AP are provided with the identification information of the specific-generated wireless LAN AP from the road management server 200. [

Step S540: Each of the WLAN access points 100 analyzes a geographical correlation between the WLAN AP and the specific-occurring WLAN AP based on the order in which the WLAN APs are installed on the road. For example, it analyzes how many steps are ahead for a specific emerging wireless LAN AP. Based on the design specifications when installing the wireless LAN access point according to the present invention, these wireless LAN access points can roughly recognize how much the one-step separation distance corresponds to a certain physical distance (e.g., 50 meters).

Step S550: Each wireless LAN access point 100 determines whether the geographical correlation is within a predetermined threshold. For example, 10 wireless LAN access points located in front of a specific-occurring wireless LAN AP.

Step S560: As a result of the confirmation, the wireless LAN access point judging that the geographical correlation is equal to or larger than the threshold (e.g., 10 steps) is ignored because the specific driving vehicle is not related to itself.

Steps S570 and S580: Conversely, if it is determined that the geographical correlation is within the threshold, the WLAN access point provides geographical correlation information to the vehicle-mounted terminal 300 in its effective coverage area. Assuming that the threshold is 10 steps, the 10 wireless LAN access points ahead of the unusual wireless LAN AP judge that the specific driving vehicle is related to itself and provide the geographical correlation information to the vehicles belonging to it.

Accordingly, each of the vehicle-mounted terminals 300 provided with the information of the geographical correlation from the wireless LAN access point outputs the contents of the presence of the specific driving vehicle and the content of the geographical correlation to the driver. For example, vehicles belonging to a wireless LAN access point having a 10-step separation distance may be informed that an accident occurred at a point 500 meters ahead. In addition, vehicles belonging to a wireless LAN access point having a three-step separation distance can be informed that "an accident occurred at a point 150 meters ahead".

This makes it possible to respond immediately to anomalies that suddenly occur at unpredictable times on the road. For example, if a traffic accident occurred on a freeway, you could immediately notify a range of vehicles that are rushing to that point that an accident occurred approximately every few meters ahead of you.

Meanwhile, the present invention can be embodied in the form of computer readable code on a computer-readable non-volatile recording medium. Such a non-volatile recording medium includes all kinds of storage devices for storing computer-readable data such as a hard disk, an SSD, a CD-ROM, a NAS, a magnetic tape, a web disk, a cloud disk, The code may be distributed and stored in the storage device of the computer.

100: Wireless LAN access point
200: Road control server
300: vehicle-mounted terminal
401: median bar
501, 502: vehicle

Claims (7)

A plurality of wireless LAN access points 100 spaced along the road to set up a public hot spot along the road for communicating with a plurality of vehicle mounted terminals 300 installed on vehicles running on the road, A public hotspot AP handover-based road control system using a road control server (200) connected to an access point and a broadband network,
The mobile hotspots are provided sequentially along the roads to provide public hot spots according to their respective effective coverage and sequentially perform wireless LAN communication with vehicle-mounted terminals through the AP handover in accordance with the installation order on the road as the vehicle travels, Vehicle terminal identification information and wireless communication characteristic information to the plurality of vehicle-mounted terminals through wireless LAN communication and, when receiving the identification information of the specific traveling vehicle from the road management server, A plurality of wireless LAN access points (100) for selecting the wireless LAN access points and providing the specific on-boarding information to the selected in-vehicle terminals within each effective coverage area;
And a road running status information database is provided from the plurality of wireless LAN access points to the vehicle terminal identification information and the wireless communication characteristic information for the plurality of vehicle-mounted terminals, and the road running status information database A road management server (200) for obtaining driving status information for each vehicle by sorting information, identifying a specific driving vehicle according to a preset reference from the driving status information for each vehicle, and providing the identified driving vehicle to the wireless LAN access point;
A public hot spot AP handover based road control system.
The method according to claim 1,
The plurality of wireless LAN access points 100 are connected to the plurality of vehicle-mounted terminals through a Wi-Fi direct connection,
The plurality of wireless LAN access points 100 are set identically to a specific terminal name in advance so that even if the vehicle-mounted terminal continually transitions the effective coverage according to the driving of the road, the wireless LAN access point can be detected in device search for Wi- Discover and connect,
Wherein the WLAN access point (100) is configured to automatically perform user authentication on the in-vehicle terminal requesting the Wi-Fi direct connection as a group owner for the Wi-Fi direct connection Of the road control system.
The method according to claim 1,
The road management server 200 identifies a wireless LAN access point (hereinafter referred to as a 'specific wireless LAN access point AP') that provides effective coverage to the specific driving vehicle, Provides identification information of a specific occurrence wireless LAN AP,
Upon receiving the identification information of the specific wireless LAN access point, the wireless LAN access point 100 analyzes the geographical correlation between itself and the specific wireless LAN access point based on the installation order on the road, Wherein the mobile terminal is configured to provide the mobile terminal with an AP handover-based road control system.
The method according to claim 1,
The road management server 200 arranges the wireless communication characteristic information in the time order on the basis of the vehicle terminal identification information from the road running state information database and generates the wireless communication characteristic information on the road based on the variation pattern graph of the wireless communication characteristic information And the road condition information of each vehicle is acquired.
The method of claim 4,
The plurality of wireless LAN access points 100 are configured to perform wireless LAN communication in common with the vehicle-mounted terminals 300 of the vehicles that are installed at the central separation point of the road and run in both directions of the road Public hotspot AP handover based road control system.
The method of claim 4,
The road management server 200 analyzes the vehicle-specific running state information to detect a combination of the intermittent-type running characteristic and the dominant-type constant-velocity running characteristic in the running state information of the specific vehicle, And a drowsy driving alarm message is provided to the wireless LAN access point.
The method of claim 4,
The road management server 200 analyzes the driving state information of each vehicle and detects a suspected vehicle having a deviation of more than a predetermined threshold value in comparison with other vehicles belonging to the same wireless LAN access point, And provides the information corresponding to the position of the suspected vehicle to the public hot spot AP handover-based road control system.

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