KR20050078687A - System and method for traffic information service using wireless local area network bridge - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a traffic information service system using a wireless LAN bridge and a method thereof.

2. The technical problem to be solved by the invention

The present invention, such as vehicle location tracking, driving speed, accidental situation information, etc., even in an area where communication is not covered by the wireless LAN base station apparatus using a wireless LAN (Wireless Local Area Network) bridge communication technology. The purpose of the present invention is to provide a traffic information service system and method using a wireless LAN bridge for collecting and providing traffic information.

3. Summary of Solution to Invention

The present invention provides a traffic information service system using a wireless LAN bridge, comprising: wireless LAN connection means for exchanging a transaction for collecting and providing traffic information with a vehicle-mounted terminal mounted on a vehicle through wireless LAN communication; A first WLAN communication means for collecting and providing traffic information by allocating an available channel to the vehicle-mounted terminal through the WLAN access means when the vehicle enters a WLAN communication area; When the vehicle enters a wireless LAN communication area, traffic information is collected and provided by allocating an available channel to the vehicle-mounted terminal through the wireless LAN access means, and relaying the traffic information between the first wireless LAN communication means and the packet classification means. Second WLAN communication means for; The packet for classifying traffic information received through the second WLAN communication means into a traffic information collection packet and a traffic information request packet, and transmitting the traffic information provided to the vehicle-mounted terminal to the second WLAN communication means. Classification means; Traffic information collecting means for collecting a traffic information collecting packet classified by the packet classification means; And traffic information providing means for extracting the corresponding traffic information for the traffic information request packet classified by the packet classification means and providing it to the packet classification means.

4. Important uses of the invention

The present invention is used for traffic information collection and provision system.

Description

Traffic information service system using wireless LAN bridge and method thereof {System and method for traffic information service using Wireless Local Area Network Bridge}

The present invention relates to a traffic information service system and a method using a wireless LAN bridge, and more particularly, to a wireless LAN base station apparatus using a wireless LAN (Wireless Local Area Network) bridge communication technology. The present invention relates to a traffic information service system and a method using a wireless LAN bridge for collecting and providing traffic information such as vehicle location tracking, driving speed for each section, and accident situation information even in an area where communication is not possible.

Wireless LAN technology is a technology that operates in connection with a wired LAN according to the Institute of Electrical and Electronics Engineers (IEEE) 802.3. As a standard of technology, various technologies such as IEEE802.11, IEEE802.11b, and Bluetooth are used. have. Recently, DS (Direct Sequence) type wireless LAN according to IEEE802.11b is the most used in business and the price is low.

The function of the wireless LAN is to simply extend the wired LAN to the wireless section and to install a separate protocol to authenticate the terminal, and operate as a DHCP (Dynamic Host Configuration Protocol) client and server to receive a public IP (Internet Protocol) address from the network. In addition, there is a function to allocate a private IP address to the terminal.

Wireless LAN access point (AP) has a built-in wired LAN hub (Hub) function so that a wired port can be connected to a printer or a desktop PC that is placed in a fixed location without the need for mobility. A mobile terminal such as a notebook computer is connected to a wireless LAN.

In the case of WLAN, in order to enable only the terminals which are previously licensed to connect to the network, the WLAN APs may be used in advance with the MAC (Media Access Control) IDs of the NICs attached to the terminals. If the registered terminal is registered in the network, and the registered terminal wants to access the WLAN, the connection is allowed, and the terminal whose MAC ID is not registered is not allowed.

In order to selectively use these functions, a management function is installed in the wireless LAN, and this management function is easily activated and deactivated by general users by using a browser window such as Internet Explorer through a web method. I can do it.

Therefore, in the current technical field, it has the characteristics as described above, the service area is wide, and the traffic information is collected and provided by applying the wireless LAN technology that can increase the data transmission speed from 1Mbps to 54Mbps, and also provided by the high speed LAN. There is a need for a method for performing Internet search and mobile office functions.

Here, the conventional method of collecting and providing traffic information, conventionally, a method using Dedicated Short Range Communication (DSRC) or a beacon communication, or a roadside base station device and a vehicle-mounted device There was a method using infrared light.

However, these conventional traffic information collection and provision methods have a disadvantage in that it is difficult to collect and provide traffic information for a vehicle that runs at a constant speed due to a low data transmission speed (9600bps ~ 1Mbps).

In addition, such a conventional traffic information collection and provision method has a problem that cannot provide various services because the service area is extremely limited.

In addition, the conventional traffic information collection and provision method needs to install a continuous cell type roadside base station apparatus over the entire area in order to expand the traffic information service area, which has a problem in that it is limited in time and cost.

The present invention has been proposed to solve the above problems, and the vehicle location tracking in the area where communication is not covered by the wireless LAN base station apparatus using a wireless LAN (Wireless Local Area Network) bridge communication technology It is an object of the present invention to provide a traffic information service system and a method using a wireless LAN bridge for collecting and providing traffic information, such as driving speed and sudden situation information for each section.

The apparatus of the present invention for achieving the above object is, in a traffic information service system using a wireless LAN bridge, wireless for exchanging a transaction for collecting and providing traffic information with a vehicle-mounted terminal mounted on a vehicle through wireless LAN communication LAN connection means; A first WLAN communication means for collecting and providing traffic information by allocating an available channel to the vehicle-mounted terminal through the WLAN access means when the vehicle enters a WLAN communication area; When the vehicle enters a wireless LAN communication area, traffic information is collected and provided by allocating an available channel to the vehicle-mounted terminal through the wireless LAN access means, and relaying the traffic information between the first wireless LAN communication means and the packet classification means. Second WLAN communication means for; The packet for classifying traffic information received through the second WLAN communication means into a traffic information collection packet and a traffic information request packet, and transmitting the traffic information provided to the vehicle-mounted terminal to the second WLAN communication means. Classification means; Traffic information collecting means for collecting a traffic information collecting packet classified by the packet classification means; And traffic information providing means for extracting the corresponding traffic information for the traffic information request packet classified by the packet classification means and providing the same to the packet classification means.

On the other hand, in the traffic information service method using a wireless LAN bridge, the wireless LAN bridge is connected to the vehicle-mounted terminal of the vehicle entering the wireless LAN communication area of the wireless LAN bridge requires the channel allocation, An available channel assignment step of allocating an available channel to a vehicle-mounted terminal mounted on a vehicle; A service table collection step of collecting a packet type service table (traffic information) from the vehicle-mounted terminal through the assigned channel; A traffic information classification step of classifying the traffic information collection packet and the traffic information request packet according to the service identifier of the collected service table; A traffic information updating step of updating, in real time, previously collected and stored traffic information using the classified traffic information collection packet; And a traffic information providing step of identifying the classified traffic information request packet, extracting the corresponding traffic information, and transmitting the traffic information to the vehicle-mounted terminal through the wireless LAN communication area.

The present invention provides a traffic information collecting and providing system for collecting and providing traffic information to a driving vehicle even in a communication incapable area that a wireless LAN base station cannot cover by using a wireless LAN bridge communication technology (ATIS: Advanced Traveler Information). As a system, a wireless LAN expanded by using a wireless LAN base station device and a wireless LAN bridge together with a wireless LAN access device (AP) corresponding to a hub of an existing wired LAN. ) When a vehicle enters the communication area, traffic information is collected by configuring a wireless LAN communication link between a wireless LAN base station device, a wireless LAN bridge, and a vehicle-mounted terminal equipped with a network interface card (NIC) mounted on the vehicle. And provide. In addition, due to the characteristics of the wireless LAN as well as traffic information, it provides additional information (such as Internet search and mobile office functions) such as weather, news, securities, and file search (performance, neighboring shopping malls) to the wireless Internet.

As described above, the present invention configures a traffic information collection and provision system (ATIS) by applying a wireless LAN technology that can increase the data transmission rate from 1Mbps to 54Mbps. This system not only collects and provides traffic information, but also can perform internet search and mobile office functions provided by the high-speed LAN, which has the advantage of efficiently providing a complex service to users.

Here, the vehicle is equipped with a terminal connection device, a GPS (Global Positioning System) receiver, a vehicle-mounted terminal (PDA or a small laptop) in which a traffic information input / output device is inserted, and communication that the WLAN base station apparatus cannot cover. After installing a wireless LAN bridge in which a wireless LAN access device is inserted in a disabled area, and forming a wireless LAN communication area that can cover multiple lanes with a single wireless LAN bridge, when multiple vehicles enter the communication area, It not only collects and provides traffic information (vehicle location tracking, driving speed information for each section, unexpected situation information, etc.) between the installed vehicle terminal and the wireless LAN bridge, but also provides weather, news, securities, and file search (performance) And additional information (such as internet shopping and mobile office functions) can be provided over the wireless Internet.

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

1 is a structural diagram of an embodiment of a traffic information service system using a wireless LAN bridge according to the present invention.

First, the WLAN base station apparatus 11 for collecting and providing traffic information is installed at a predetermined distance. In addition, the wireless LAN base station device 11 is installed between the wireless LAN bridge 12 at regular intervals to serve to collect and provide traffic information of the vehicle in a communication impossible area that the wireless base station 11 can not cover. Do it. At this time, the wireless LAN bridge 12 is preferably installed to form a continuous cell between the wireless LAN base station device (11).

On the other hand, the wireless LAN base station apparatus 11 is connected to the traffic information server 13 by wire to transmit the traffic information obtained from the vehicle to the traffic information server 13 in real time, and traffic information from the traffic information server 13 Receives the received to provide the vehicle entered into the communication area in real time, and transmits the traffic information of the vehicle received from the wireless LAN bridge 12 to the traffic information server 13, and received from the traffic information server 13 The traffic information is transmitted to the vehicle entering the communication area in real time through the wireless LAN bridge 12.

At this time, the wireless LAN bridge 12 obtains the traffic information from the vehicle and not only transfers the obtained traffic information or the traffic information received from another wireless LAN bridge to the WLAN base station apparatus 11, but also the WLAN base station apparatus ( 11) This function transmits the traffic information received from the other wireless LAN bridge and the traffic information received from other nearby wireless LAN bridge to the vehicle entering its communication area.

Meanwhile, the traffic information server 13 stores the traffic information received from the WLAN base station apparatus 11 and transmits the corresponding traffic information to the WLAN base station apparatus 11 or the WLAN bridge 12 according to the request of the vehicle. Transfer to the vehicle via.

Looking at this in more detail, the vehicle entering the communication area of the wireless LAN 12, the traffic information, that is, for example, the traffic information, such as "occurrence of a 10-minute crash in front of the 10m up line of XXX rest stop" or "car failure" When transmitting to the LAN bridge 12, the wireless LAN bridge 12 received it can be delivered to the traffic information server 13 through the wireless LAN base station device 11 to receive traffic information (emergency action information).

At this time, if the wireless LAN bridge is not adjacent to the wireless LAN base station apparatus 11 and adjacent to other wireless LAN bridges, the traffic information is transmitted to the adjacent wireless LAN bridge, and the adjacent wireless LAN bridge unit is the wireless LAN base station apparatus 11. To pass. That is, the wireless LAN bridge 12 additionally performs a relay function.

As described above, the present invention does not install the WLAN base station apparatus 11 in all regions in order to collect and provide traffic information for a vehicle, and performs a communication function and a relay function of the WLAN base station apparatus 11, traffic information. By installing the wireless bridge 12 that does not connect to the server 13 by wire, it is possible to collect and provide traffic information at a low cost.

2 is a diagram illustrating an embodiment of a traffic information service system using a wireless LAN bridge according to the present invention.

As shown in FIG. 2, the traffic information service system using the wireless LAN bridge according to the present invention exchanges a transaction for collecting and providing traffic information with a vehicle-mounted terminal 21 mounted on a vehicle through wireless LAN communication. When a vehicle enters a wireless LAN access point (AP) 23 and a vehicle in a wireless communication area, an available channel is allocated to the vehicle-mounted terminal 21 through the wireless LAN access point 23, and traffic information is allocated through the assigned channel. When the vehicle enters the wireless LAN bridge 24 to collect and provide the wireless LAN communication area, an available channel is allocated to the vehicle-mounted terminal 21 through the wireless LAN access device 23, and traffic information is allocated through the assigned channel. Collect and provide, and transmit the traffic information received from the wireless LAN bridge 24 to the packet classification server 26, and transmits the traffic information received from the traffic information server 27 through the packet classification server 26 Wireless for delivery to 24 Classify the packets (traffic information collection packets, traffic information request packets) received through the LAN base station apparatus 25 and the wireless LAN base station apparatus 25, and transmit the traffic information provided to the vehicle-mounted terminal 21. A packet classification server 26 for forwarding the packet classification server 26 and a traffic information collection packet classified by the packet classification server 26 are collected, and the corresponding traffic information for the traffic information request packet is extracted. And a traffic information server 27 for providing the vehicle through the WLAN base station apparatus 25.

In more detail, the wireless LAN bridge 24 and the wireless LAN base station device 25 exchanges transactions for collecting and providing traffic information with the vehicle-mounted terminal 21 attached to the vehicle through wireless LAN communication, A wireless LAN access device 23 for processing an ITS (Intelligent Transport System) service including information gathering and providing service is provided.

The vehicle-mounted terminal 21 which performs wireless LAN communication with the wireless LAN bridge 24 and the wireless LAN base station device 25 includes a terminal access device 22, a global positioning system (GPS) receiver, and traffic information input / output. An output device is provided. Here, the traffic information input / output device inputs or outputs traffic information in the form of voice or / and text.

The packet classification server 26 classifies the traffic information collected from the vehicle-mounted terminal 21 and the traffic information request packet and provides them to the traffic information server 27.

The traffic information server 27 processes the traffic information received from the packet classification server 26 in real time, extracts the corresponding traffic information for the traffic information request packet received from the packet classification server 26, and uses the WLAN base station apparatus ( 25) or via the wireless LAN bridge 24 to the vehicle mounting terminal 21.

In summary, when the vehicle equipped with the vehicle-mounted terminal 21 into which the terminal connection device 22 is inserted enters the wireless LAN communication area, the wireless LAN bridge 24 into which the wireless LAN connection device 23 is inserted is provided. ) Transmits the service table obtained by configuring the wireless link with the vehicle-mounted terminal 21 to the packet classification server 26 through the WLAN base station device 25, and the packet classification server 26 of the received service table. By separating the traffic information collection packet and the traffic information request packet through the service identifier, the traffic information collection packet is transmitted to the traffic information collection server 28 and the traffic information request packet is transmitted to the traffic information providing server 29. Then, the traffic information collecting server 28 updates the traffic information using the received traffic information collection packet, and the traffic information providing server 29 searches for the corresponding traffic information according to the received traffic information request packet and the vehicle loading terminal. Transfer to 21. At this time, the traffic information collecting server 28 and the traffic information providing server 29 may be implemented as a single traffic information server (27).

The traffic information service system according to the present invention uses a vehicle terminal identifier collection by using a wireless LAN communication between the vehicle mounting terminal 21 and the wireless LAN base station apparatus 25 or the vehicle mounting terminal 21 and the wireless LAN bridge 24. Performs a traffic information collection service by calculating the vehicle speed information for each section using the vehicle location tracking and the distance between the collected vehicle terminal identifier and the wireless LAN base station device 25, and wirelessly transmits the traffic information transmitted from the traffic information server 27. By providing to the vehicle-mounted terminal 21 through the LAN base station device 25 or the wireless LAN bridge 24, the driving speed information and sudden situation for each section centering on the wireless LAN base station device 25 or the wireless LAN bridge 26 Perform traffic information provision services such as information. When the vehicle is driving and requests additional information such as weather, news, securities, and file search (performance, neighboring mall) in the wireless LAN communication area, the vehicle is mounted through the wireless LAN base station device 25 and the wireless LAN bridge 24. By providing the terminal 21 performs the additional information providing service.

3 is a flowchart illustrating a traffic information service method using a wireless LAN according to the present invention.

First, the vehicle mounting terminal 21 stores a service table as shown in FIG. 4 through a traffic information input / output device and a location information receiver.

Subsequently, when the vehicle equipped with the vehicle mounting terminal 21 having the terminal connection device 22 enters the wireless LAN communication area, the vehicle mounting terminal 21 is connected to the wireless LAN access device through the terminal connection device 22 ( Channel assignment is requested to the wireless LAN bridge 24 connected to the network 23 (301). Then, the wireless LAN bridge 24 searches for an empty channel (available channel) and notifies the vehicle-mounted terminal 21 to the on-board terminal 21 through the wireless LAN access device 23 (302).

When the vehicle enters the wireless LAN communication area of the wireless LAN bridge 24 and the channel is allocated, the vehicle loading terminal 21 is a vehicle terminal identifier, service identifier, vehicle model, vehicle number, location information (GPS information), emergency information. The service table including the unexpected situation information and the requested traffic information is transmitted to the wireless LAN 24 (step 303).

Then, the wireless LAN bridge 24 adds the date and time (4 bytes) and its identifier (wireless LAN bridge identifier) to the wireless LAN base station apparatus 25 as shown in FIG. 304, 305). Then, the WLAN base station apparatus 25 transmits the received service date and the service table to which the first WLAN bridge identifier is added to the packet classification server 26 (306).

Thereafter, the packet classification server 26 analyzes the service identifier of the service table received from the WLAN base station device 25, classifies the service table into a traffic information collection packet or a traffic information request packet, and transmits the service identifier to the traffic information server 26. Pass (307, 308).

Then, the traffic information server 26 updates the previous traffic information if the service table received from the wireless LAN bridge 24 is a traffic information collection packet, and retrieves the traffic information if the traffic information request packet is a packet classification server 26. Transfer to the wireless LAN base station device 25 through (309 to 311). Then, the wireless LAN base station apparatus 25 transmits the received traffic information to the wireless LAN bridge 24 (312), the wireless LAN bridge 24 is mounted on the vehicle with the traffic information received through the terminal connection device 22 Transmission to the terminal 21 (313, 314).

Thereafter, the traffic information input / output device of the vehicle mounting terminal 21 outputs the traffic information received from the wireless LAN bridge 24.

In an embodiment of the present invention, one wireless LAN bridge has been described as an example, but when there are two wireless LAN bridges, one wireless LAN bridge receives traffic information collected by another wireless LAN bridge and transmits the traffic information to an adjacent WLAN base station device. Function (relay function). In this case, one wireless LAN bridge and the other wireless LAN bridge performs the functions of the aforementioned wireless bridge 24. Therefore, the number of wireless LAN bridges does not affect the present invention.

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.

As described above, the present invention forms a wireless LAN communication area capable of covering multiple lanes through a single wireless LAN bridge, and when a plurality of vehicles enter the communication area, the vehicle mounting terminal and the wireless LAN bridge mounted in the vehicle. There is an effect that can collect and provide traffic information (vehicle location tracking, driving speed information for each section, accidental situation information, etc.) between.

In addition, the present invention has an effect that can provide additional information (such as Internet search and mobile office functions), such as the weather, news, securities, file search (performance, neighboring malls) provided by the high-speed LAN over the wireless Internet.

In addition, the present invention has an effect that can collect and provide traffic information to the vehicle even in a communication impossible area that the wireless LAN base station apparatus does not cover by using a wireless LAN bridge does not need to establish a separate wired communication infrastructure.

In addition, the present invention has the effect that it is possible to collect and provide traffic information to the vehicle at a low cost by installing a wireless LAN bridge that does not need a separate wired communication infrastructure in a communication impossible area that the wireless LAN base station device does not cover have.

In addition, the present invention is applied to the bus operation management has an effect that can efficiently provide the bus arrival guide information, bus accident situation management information to the passengers, drivers, transportation companies, public offices.

1 is a structural diagram of an embodiment of a traffic information service system using a wireless LAN bridge according to the present invention;

2 is a configuration diagram of an embodiment of a traffic information service system using a wireless LAN bridge according to the present invention;

3 is a flowchart illustrating an embodiment of a traffic information service method using a wireless LAN bridge according to the present invention;

4 is a diagram illustrating an embodiment of a service table collected from a vehicle terminal apparatus according to the present invention.

5 is a diagram illustrating an embodiment of a service table collected from a wireless LAN bridge according to the present invention.

* Explanation of symbols for the main parts of the drawings

21: vehicle mounting terminal 22: terminal connection device

23: wireless LAN connection device 24: wireless LAN bridge

25: wireless LAN base station device 26: packet classification server

27: traffic information server 28: traffic information collection server

29: traffic information server

Claims (4)

In a traffic information service system using a wireless LAN bridge, WLAN connection means for exchanging a transaction for collecting and providing traffic information with a vehicle-mounted terminal mounted on a vehicle through WLAN communication; A first WLAN communication means for collecting and providing traffic information by allocating an available channel to the vehicle-mounted terminal through the WLAN access means when the vehicle enters a WLAN communication area; When the vehicle enters a wireless LAN communication area, traffic information is collected and provided by allocating an available channel to the vehicle-mounted terminal through the wireless LAN access means, and relaying the traffic information between the first wireless LAN communication means and the packet classification means. Second WLAN communication means for; The packet for classifying traffic information received through the second WLAN communication means into a traffic information collection packet and a traffic information request packet, and transmitting the traffic information provided to the vehicle-mounted terminal to the second WLAN communication means. Classification means; Traffic information collecting means for collecting a traffic information collecting packet classified by the packet classification means; And Traffic information providing means for extracting the corresponding traffic information for the traffic information request packet classified by the packet classification means and providing it to the packet classification means. Traffic information service system using a wireless LAN bridge including a. The method of claim 1, The first WLAN communication means, Traffic information service system using a wireless LAN bridge, characterized in that the installation is possible at a low cost without the traffic information collecting means and the traffic information providing means and the construction of a wired communication infrastructure. The method according to claim 1 or 2, The first WLAN communication means further performs a traffic information relay function between the other WLAN communication means and the second WLAN communication means. In the traffic information service method using a wireless LAN, An available channel allocating step of allocating an available channel to the on-board terminal mounted on the vehicle by the on-board terminal of the vehicle entering the wireless LAN communication area of the wireless LAN bridge; A service table collection step of collecting a packet type service table (traffic information) from the vehicle-mounted terminal through the assigned channel; A traffic information classification step of classifying the traffic information collection packet and the traffic information request packet according to the service identifier of the collected service table; A traffic information updating step of updating, in real time, previously collected and stored traffic information using the classified traffic information collection packet; And The traffic information providing step of identifying the classified traffic information request packet, extracting the corresponding traffic information, and transmitting the traffic information to the vehicle-mounted terminal through the wireless LAN communication area. Traffic information service method using a wireless LAN bridge comprising a.