KR20030003830A - System and Method of information offering by mobile phone in intelligent transportation system - Google Patents
System and Method of information offering by mobile phone in intelligent transportation system Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
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Abstract
Description
본 발명은 단거리 무선 전용통신(DSRC; Dedicated Short Range Communication)시스템을 이용한 지능형 교통망 시스템(ITS; intelligent transportation system)에서의 정보 제공방법에 관한 것으로, 특히 노변기지국과의 통신을 할 수 없어 필요한 정보 제공이 어려운 지역에 위치한 차량탑재장치가 이동통신 단말기와 연동 하여 필요한 정보를 제공받을 수 있도록 하는 지능형 교통망 시스템에서 이동통신 단말기를 이용한 정보 제공시스템 및 방법에 관한 것이다.The present invention relates to a method for providing information in an intelligent transportation system (ITS) using a dedicated short range communication (DSRC) system. In particular, the present invention cannot provide communication with a roadside base station. The present invention relates to an information providing system and method using a mobile communication terminal in an intelligent transportation network system that enables a vehicle-mounted device located in this difficult area to be provided with necessary information in connection with a mobile communication terminal.
단거리 무선 전용통신은 5.8GHz의 주파수 대역을 이용하여 도로 주변에 설치하는 노변기지국(RSU; Road Side Unit)과 차량에 장착되는 차량탑재장치(OBU; On-Board Unit)사이에 무선 통신하는 방법으로 노변기지국에 연결된 안테나에 의해서 형성되는 통신가능 영역(Communication Zone)내를 차량탑재장치가 장착된 차량이 통과할 경우만 통신이 가능한 시스템으로 상기 노변기지국으로부터의 데이터를 수신하기만 하는 수동형 방식과, 노변기지국 및 차량탑재장치간의 데이터를 주고받을 수 있는 능동형으로 나누어진다.Short-range wireless dedicated communication is a method of wirelessly communicating between a roadside unit (RSU) installed around a road and an on-board unit (OBU) mounted on a vehicle using a frequency band of 5.8 GHz. A passive system that only receives data from the roadside base station as a system capable of communicating only when a vehicle equipped with the vehicle-mounted device passes through a communication zone formed by an antenna connected to the roadside base station; It is divided into active type that can exchange data between roadside base station and on-vehicle device.
본 발명에 따른 지능형 교통망 시스템은 능동형 단거리 무선 전용통신을 이용하여 차량탑재장치에 교통정보 등을 제공하는 시스템이다.The intelligent traffic network system according to the present invention is a system for providing traffic information to a vehicle-mounted device using active short-range wireless dedicated communication.
도 1은 지능형 교통망 시스템의 구성을 나타낸 블록도이고, 도 2는 지능형 교통망 시스템의 정보 제공방법의 동작순서를 나타낸 플로우 차트이다.1 is a block diagram showing the configuration of an intelligent traffic network system, Figure 2 is a flow chart showing the operation procedure of the information providing method of the intelligent traffic network system.
도 1을 참조하면, 지능형 교통망 시스템은 차량에 장착되어, 운전자의 요구에 의한 정보요구 및 전송되는 정보를 표시하는 복합적인 기능을 가지는 차량탑재장치(10)와, 상기 차량탑재장치(10)와 단거리 전용 무선통신 방식에 의한 무선통신을 위하여 도로의 주변에 설치되는 노변기지국(20)과, 일정 지역의 노변기지국(20)과 모두 연결되어 노변기지국(20)으로 전송되는 정보 또는 노변기지국(20)을 통해 전달되는 차량탑재장치(10)의 정보요구에 대한 제어 및 관리를 위한 지역서버(30)와, 상기 지역서버(30)와 연결되어 전체적인 지능형 교통망 시스템을 관리하기 위한 중앙서버(50)와, 상기 지능형 교통망 시스템에서 필요로 하는 정보를 제공하기 위한 정보 제공 사업자의 정보제공 서버(40)를 포함하여 구성된다.Referring to FIG. 1, an intelligent transportation network system is mounted on a vehicle, and has a vehicle mounting apparatus 10 having a complex function of displaying information requested and transmitted by a driver's request, and the vehicle mounting apparatus 10. The roadside base station 20 connected to the roadside base station 20 installed in the periphery of the road and the roadside base station 20 in a predetermined area for wireless communication by the short-range dedicated wireless communication method or the roadside base station 20 Regional server 30 for control and management of the information request of the vehicle-mounted device (10) delivered through the) and the central server (50) connected to the regional server 30 for managing the overall intelligent transportation network system And an information provision server 40 of an information provider for providing information required by the intelligent transportation network system.
상기와 같이 구성되는 지능형 교통망 시스템의 차량탑재장치가 교통정보를 제공받는 것을 도 1 및 도 2를 참조하여 설명하면 다음과 같다.Referring to FIGS. 1 and 2, the vehicle-mounted device of the intelligent transportation network system configured as described above is provided with traffic information as follows.
차량탑재장치(10)를 장착한 차량이 도 1의 영역 'A', 'B', 'C'와 같은 노변기지국(20)의 통신영역에서 차량운전자가 필요로 하는 교통정보 요구 메시지를 해당 노변기지국(20)으로 전송하면(S101), 상기 노변기지국(20)은 차량탑재장치(10)로부터 수신된 교통정보 요구 메시지를 지역서버(30)로 전달한다(S102).A vehicle equipped with the vehicle-mounted device 10 receives a traffic information request message required by a vehicle driver in a communication area of a roadside base station 20 such as areas 'A', 'B', and 'C' of FIG. 1. When transmitting to the base station 20 (S101), the roadside base station 20 transmits the traffic information request message received from the vehicle-mounted device 10 to the local server 30 (S102).
상기 교통정보 요구 메시지를 수신한 지역서버(30)는 상기 정보제공 서버(40)로 상기 차량탑재장치(10)가 요구한 교통정보를 요청하고(S103), 상기 정보제공 서버(40)는 지역서버(30)가 요구한 교통정보를 지역서버(30)의 메시지 포맷에 맞도록 가공하여 지역서버(30)로 전송한다(S104).The regional server 30 receiving the traffic information request message requests the traffic information requested by the vehicle-mounted device 10 to the information providing server 40 (S103), and the information providing server 40 sends a local information. The traffic information requested by the server 30 is processed in accordance with the message format of the local server 30 and transmitted to the local server 30 (S104).
상기 지역서버(30)는 정보제공 서버(40)로부터 수신된 교통정보를 노변기지국(20)으로 전송하고(S105), 상기 노변기지국(20)이 차량탑재장치(10)로 전달하여(S106), 운전자가 차량탑재장치(10)의 액정 또는 음성으로 제공되는 서비스를 받게 된다(S107).The regional server 30 transmits the traffic information received from the information providing server 40 to the roadside base station 20 (S105), and the roadside base station 20 delivers the vehicle-mounted device 10 (S106). The driver receives the service provided by the liquid crystal or voice of the vehicle mounting apparatus 10 (S107).
그러나, 상기와 같은 방식은 도 1의 D영역과 같은 노변기지국이 없는 영역에서는 서비스 받기가 불가능하다. 즉, 노변기지국의 통신영역을 이탈하면 차량탑재장치는 원하는 정보를 제공받을 수 없는 것이다.However, the above-described method cannot receive service in an area without a roadside base station such as area D of FIG. In other words, when leaving the communication area of the roadside base station, the vehicle-mounted device is not able to receive the desired information.
상기와 같은 문제를 해결하기 위하여, 본 발명은 노변기지국의 통신 영역에 미치지 않는 지역에서의 정보를 제공받기가 불가능했던 것을, 이동통신 시스템과 차량탑재장치가 통신할 수 있도록 함으로써, 노변기지국의 통신 영역에 미치지 못하는 지역에서는 이동통신 단말기를 이용하여 이동통신 시스템과 접속하고, 정보를 제공받을 수 있도록 하는 지능형 교통망 시스템에서 이동통신 단말기를 이용한 교통정보 제공 시스템 및 방법을 제공함에 그 목적이 있다.In order to solve the above problems, the present invention was unable to receive information in an area not falling within the communication area of the roadside base station, by allowing the mobile communication system and the vehicle-mounted device to communicate with the roadside base station communication It is an object of the present invention to provide a traffic information providing system and method using a mobile communication terminal in an intelligent transportation network system that can access a mobile communication system using a mobile communication terminal and receive information in an area that does not reach an area.
도 1은 지능형 교통망 시스템의 구성을 나타낸 블록도.1 is a block diagram showing the configuration of an intelligent traffic network system.
도 2는 지능형 교통망 시스템의 정보 제공방법의 동작순서를 나타낸 플로우 차트2 is a flow chart showing the operation procedure of the information providing method of intelligent traffic network system
도 3은 본 발명의 실시 예에 따른 지능형 교통망 시스템에서 이동통신 단말기를 이용한 정보제공 시스템의 구성을 나타낸 블록도.Figure 3 is a block diagram showing the configuration of an information providing system using a mobile communication terminal in an intelligent traffic network system according to an embodiment of the present invention.
도 4는 본 발명의 실시 예에 따른 지능형 교통망 시스템의 노변기지국의 비 통신지역에서의 이동통신 단말기를 이용한 정보 제공방법의 동작순서를 나타낸 플로우 차트.4 is a flowchart illustrating an operation procedure of an information providing method using a mobile communication terminal in a non-communication area of a roadside base station of an intelligent transportation network system according to an embodiment of the present invention.
<도면의 주요부분의 간단한 설명><Brief description of the main parts of the drawings>
10 : 차량탑재장치20 : 노변기지국10: vehicle mounting apparatus 20: roadside base station
30 : 지역서버40 : 정보제공 서버30: local server 40: information providing server
50 : 중앙서버60 : 이동통신 단말기50: central server 60: mobile communication terminal
70 : 이동통신 기지국80 : 이동통신 시스템70: mobile communication base station 80: mobile communication system
본 발명에 따른 지능형 교통망 시스템에서 이동통신 단말기를 이용한 교통정보 제공시스템은,Traffic information providing system using a mobile communication terminal in an intelligent traffic network system according to the present invention,
노변에 설치된 단거리 무선 전용통신을 위한 노변기지국 및 이동통신 서비스를 위한 이동통신 기지국과.A roadside base station for short-range wireless dedicated communication and a mobile communication base station for mobile communication service.
정보제공 서비스를 이용하기 위해서 상기 노변기지국의 통신영역 여부에 따라 상기 노변기지국과의 통신과, 이동통신 단말기를 통한 이동통신 기지국과의 통신을 선택적으로 이용하는 차량탑재장치와,A vehicle-mounted device for selectively using communication with the roadside base station and communication with a mobile communication base station through a mobile communication terminal according to the communication area of the roadside base station in order to use an information providing service;
상기 이동통신 단말기 및 차량탑재장치로부터 요구하는 데이터 정보를 제공하는 정보제공서버를 포함하여 구성되는 것을 특징으로 한다.Characterized in that it comprises an information providing server for providing data information requested from the mobile communication terminal and the vehicle on-board device.
또한, 본 발명에 따른 지능형 교통망 시스템에서 이동통신 단말기를 이용한 정보제공방법은,In addition, the information providing method using a mobile communication terminal in an intelligent traffic network system according to the present invention,
차량운전자가 요구하는 임의의 정보를 제공받기 위하여 차량탑재장치가 주변의 노변기지국을 검색하는 단계;Searching for a nearby roadside station by the vehicle-mounted device so as to receive any information required by the vehicle driver;
상기 차량탑재장치가 주변에 통신가능한 노변기지국이 없으면, 상기 차량탑재장치와 연결된 이동통신 단말기로 정보를 요구하기 위한 통화요구 신호를 전송하는 단계;Transmitting a call request signal for requesting information to a mobile communication terminal connected to the on-vehicle device if the on-vehicle device does not have a roadside base station that can communicate therewith;
상기 통화요구 신호에 따라 이동통신 단말기가 이동통신 기지국을 통하여 이동통신 시스템과 접속하고 상기 차량탑재장치가 주문한 정보를 요청하는 단계;Connecting a mobile communication terminal to a mobile communication system through a mobile communication base station and requesting information ordered by the on-vehicle device according to the call request signal;
상기 이동통신 시스템이 정보제공 서버로 상기 차량탑재장치에서 주문한 정보를 요구하여 전송 받는 단계;Receiving, by the mobile communication system, an information providing server requesting and ordering information from the on-vehicle device;
상기 이동통신 시스템이 전송 받은 정보를 상기 이동통신 기지국을 통하여 상기 이동통신 단말기로 전송하고, 상기 이동통신 단말기가 상기 차량탑재장치로 수신한 정보를 전송하여 차량운전자에게 제공하는 단계를 포함하는 것을 특징으로 한다.And transmitting the information received by the mobile communication system to the mobile communication terminal through the mobile communication base station, and transmitting the information received by the mobile communication terminal to the vehicle mounting apparatus and providing the information to the vehicle driver. It is done.
바람직하게, 상기 차량탑재장치를 장착한 차량이 노변기지국의 통신영역으로이동하면, 상기 이동통신 단말과의 연결을 해제하고, 해당 노변기지국과의 통신을 통해 정보를 전송 받은 것을 특징으로 한다.Preferably, when the vehicle equipped with the vehicle-mounted device moves to the communication area of the roadside base station, the connection with the mobile communication terminal is released and information is received through communication with the corresponding roadside base station.
상기와 같이 구성되는 본 발명에 따른 지능형 교통망 시스템에서 이동통신 단말기를 이용한 정보 제공 시스템 및 방법을 첨부된 도면을 참조하여 설명하면 다음과 같다.The information providing system and method using the mobile communication terminal in the intelligent transportation network system according to the present invention configured as described above will be described with reference to the accompanying drawings.
본 발명에 있어서, 차량운전자가 교통정보를 제공받고자 한다면, 도 3은 본 발명의 실시 예에 따른 지능형 교통망 시스템에서 이동통신 단말기를 이용한 정보제공 시스템의 구성을 나타낸 블록도이고, 도 4는 본 발명의 실시 예에 따른 지능형 교통망 시스템의 노변기지국의 비 통신지역에서의 이동통신 단말기를 이용한 교통정보 제공방법의 동작순서를 나타낸 플로우 차트이다.In the present invention, if the vehicle driver wants to receive traffic information, Figure 3 is a block diagram showing the configuration of an information providing system using a mobile communication terminal in an intelligent traffic network system according to an embodiment of the present invention, Figure 4 is a present invention FIG. 1 is a flowchart illustrating an operation procedure of a traffic information providing method using a mobile communication terminal in a non-communication area of a roadside base station of an intelligent transportation network system according to an embodiment of the present invention.
도 3을 참조하면, 이동통신 단말기를 이용하여 교통정보를 제공받기 위해서는 지능형 교통망 시스템을 구성하는 차량탑재장치(10)와, 노변기지국(20)과, 상기 노변기지국(20)과 연결되어 있는 지역서버(30)와, 상기 지역서버와 연결된 중앙서버(50)와, 교통정보 제공을 위한 정보제공 서버(40)와, 상기 차량탑재장치(10)와 커넥터를 통하여 연결 가능한 이동통신 단말기(60)와, 상기 이동통신 단말기(60)의 무선통신을 위한 이동통신 기지국(70)과, 상기 이동통신 기지국(70)과 연결되어 이동통신 단말기(60)로의 부가서비스 및 통화서비스를 제공하는 이동통신 시스템(80)으로 구성된다. 또한, 상기 이동통신 시스템(80)은 상기 이동통신 단말기(60)를 통하여 차량탑재장치(10)에 교통정보를 제공하기 위하여 정보제공 서버(40)와 연결되어 있다.Referring to FIG. 3, in order to receive traffic information using a mobile communication terminal, a vehicle mounting apparatus 10 constituting an intelligent traffic network system, a roadside base station 20, and an area connected to the roadside base station 20 are provided. A server 30, a central server 50 connected to the local server, an information providing server 40 for providing traffic information, and a mobile communication terminal 60 connectable to the vehicle mounting apparatus 10 through a connector. And a mobile communication base station 70 for wireless communication of the mobile communication terminal 60 and a mobile communication system connected to the mobile communication base station 70 to provide an additional service and a call service to the mobile communication terminal 60. It consists of 80. In addition, the mobile communication system 80 is connected to the information providing server 40 to provide traffic information to the vehicle-mounted device 10 through the mobile communication terminal 60.
상기와 같이 구성되는 본 발명은 노변기지국(20)의 통신구간 '가', '나'에서는 지능형 교통망 시스템의 동작과 동일하게 차량탑재장치(10)가 상기 노변기지국(20)을 통하여 원하는 교통정보를 제공받는다.In the present invention configured as described above, in the communication section 'a' and 'b' of the roadside base station 20, the vehicle-mounted device 10 desires traffic information through the roadside base station 20 in the same manner as the operation of the intelligent transportation network system. To be provided.
그러나, 상기 차량탑재장치(10)가 노변기지국(20)의 통신영역 '가', '나'를 벗어나 '다'구간으로 이동하면, 더이상 차량탑재장치(10)와 노변기지국(20)의 통신이 불가능하다.However, when the vehicle-mounted device 10 moves out of the communication zones 'a' and 'me' of the roadside base station 20 to the 'da' section, the vehicle-mounted device 10 and the roadside base station 20 no longer communicate. This is impossible.
따라서, 도 4와 같이, 차량운전자가 차량탑재장치를 통하여 교통정보 제공을 요청하면(S201), 상기 차량탑재장치(10)는 우선 주변의 노변기지국(20)을 검색하여 (S202), 노변기지국(20)이 검색되는 '가', '나'구간에 차량이 위치해 있다면 해당 노변기지국(20)과 통신을 통하여 교통정보를 제공받을 수 있다(S203).Therefore, as shown in FIG. 4, when the vehicle driver requests the provision of traffic information through the vehicle mounting apparatus (S201), the vehicle mounting apparatus 10 first searches for a neighboring roadside base station 20 (S202) and a roadside base station. If the vehicle is located in the section 'a' or 'b' where the search is made, the traffic information may be provided through communication with the corresponding roadside base station 20 (S203).
그러나, 상기 단계 S202에서 상기 차량탑재장치(10)가 주변의 노변기지국(20)을 검색하지 못하는 '다'구간에 있다면, 노변기지국(20)과의 통신을 통해서 교통정보를 제공받을 수는 없다.However, in step S202, if the vehicle-mounted device 10 is in the 'multi' section that cannot search for the neighboring roadside base station 20, traffic information cannot be provided through communication with the roadside base station 20. .
따라서, 상기 차량탑재장치(10)는 커넥터로 연결된 이동통신 단말기(60)에 교통정보 제공서비스 이용을 위한 통화요구 신호를 전송한다(S204). 이때, 상기 차량탑재장치(10)와 이동통신 단말기(60)는 RS232포트와 같은 커넥터로 연결되어 있으며 상기 차량탑재장치(10)에 이동통신 단말기(60)와의 데이터 송수신을 위한 프로그램이 저장되어 있어야 한다.Therefore, the vehicle mounting apparatus 10 transmits a call request signal for using the traffic information providing service to the mobile communication terminal 60 connected by the connector (S204). In this case, the vehicle mounting apparatus 10 and the mobile communication terminal 60 are connected to the same connector as the RS232 port, and the program for transmitting and receiving data with the mobile communication terminal 60 must be stored in the vehicle mounting apparatus 10. do.
상기 통화요구 신호에 따라 이동통신 단말기(60)는 주변의 이동통신 기지국(70)과 채널접속을 하고(S205), 상기 차량탑재장치(10)로부터 전송되는 교통정보 요구메시지를 전달한다(S206).According to the call request signal, the mobile communication terminal 60 makes a channel connection with the surrounding mobile communication base station 70 (S205), and transmits a traffic information request message transmitted from the vehicle-mounted device 10 (S206). .
상기 이동통신 기지국(70)은 이동통신 단말기(60)로부터 전송되는 교통정보 요구 메시지를 이동통신 시스템(80)으로 전달하고(S207), 상기 이동통신 시스템(80)은 연결되어 있는 정보제공 서버(40)에 상기 차량탑재장치(10)가 요구하는 교통정보를 요청한다(S208).The mobile communication base station 70 transmits a traffic information request message transmitted from the mobile communication terminal 60 to the mobile communication system 80 (S207), and the mobile communication system 80 is connected to an information providing server ( Request traffic information requested by the vehicle-mounted device 10 to 40 (S208).
상기 이동통신 시스템(80)의 교통정보 요구에 따라, 상기 정보제공 서버(40)는 가지고 있는 교통정보를 이동통신 시스템(80)의 데이터 포맷에 맞도록 가공하여(S209), 상기 이동통신 시스템(80)으로 전송하고(S210), 상기 이동통신 시스템(80)은 수신한 교통정보를 이동통신 기지국(70)으로 보내어, 상기 이동통신 기지국(70)이 이동통신 단말기(60)로 전달하도록 한다(S211).According to the traffic information request of the mobile communication system 80, the information providing server 40 processes the traffic information it has in accordance with the data format of the mobile communication system 80 (S209), the mobile communication system ( 80, the mobile communication system 80 transmits the received traffic information to the mobile communication base station 70 so that the mobile communication base station 70 transmits the mobile communication terminal 60 to the mobile communication terminal 60 (S210). S211).
상기 교통정보를 수신한 이동통신 단말기(60)는 커넥터를 통하여 연결된 차량탑재장치(10)로 수신한 교통정보를 전송하고(S212), 차량탑재장치(10)는 액정화면 또는 음성출력 등을 통하여 차량운전자에게 교통정보를 제공하게 된다(S213).The mobile communication terminal 60 receiving the traffic information transmits the received traffic information to the vehicle-mounted device 10 connected through the connector (S212), and the vehicle-mounted device 10 uses a liquid crystal display or a voice output. Traffic information is provided to the vehicle driver (S213).
이상에서 설명한 바와 같이, 본 발명에 따른 지능형 교통망 시스템에서 이동통신 단말기를 이용한 정보제공 시스템 및 방법은 종래의 지능형 교통망 시스템에서 정보제공을 받기 위해서는 차량탑재장치와 노변기지국간의 단거리 무선 전용통신을 이용하여 정보제공이 가능했으므로, 노변기지국이 없는 비 통신영역에서는 필요한 정보를 제공받는 것이 불가능했던 것을, 차량탑재장치와 이동통신 단말기를연결하여 서로 데이터를 주고받을 수 있도록 함으로써, 노변기지국이 없는 비 통신영역에서도 이동통신 단말기를 이용하여 이동통신 시스템과 접속하고, 정보제공을 받을 수 있도록 하여 노변기지국이 없는 비 통신영역에서도 필요한 정보를 제공받을 수 있도록 하는 효과가 있다.As described above, the information providing system and method using the mobile communication terminal in the intelligent traffic network system according to the present invention uses a short-range wireless dedicated communication between the vehicle-mounted device and the roadside base station in order to receive information in the conventional intelligent traffic network system Since information was available, it was not possible to receive the necessary information in a non-communication area without a roadside base station. The non-communication area without a roadside base station by connecting a vehicle-mounted device and a mobile communication terminal to exchange data with each other. In addition, by using the mobile communication terminal to access the mobile communication system, it is effective to receive the necessary information even in the non-communication area without the roadside base station.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104167103A (en) * | 2014-08-26 | 2014-11-26 | 无锡市恒通智能交通设施有限公司 | Traffic light display system with power amplifying circuit |
| CN104240526A (en) * | 2014-08-26 | 2014-12-24 | 无锡市恒通智能交通设施有限公司 | Intelligent traffic sign board with amplifying circuit |
| KR20210010220A (en) * | 2019-07-19 | 2021-01-27 | 에스케이텔레콤 주식회사 | Intelligent transport server and communication method thereof |
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| KR100681124B1 (en) * | 2000-02-25 | 2007-02-08 | 주식회사 케이티 | Method for providing optimal route dynamically based upon dsrc in traffic synthesis management system |
| KR20010086969A (en) * | 2000-03-06 | 2001-09-15 | 이계철 | Traffic information collection/offer system and method using dsrc |
| KR100788157B1 (en) * | 2001-06-30 | 2007-12-21 | 주식회사 케이티 | System and Method for providing ITS service using satellites communication and DSRC |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167103A (en) * | 2014-08-26 | 2014-11-26 | 无锡市恒通智能交通设施有限公司 | Traffic light display system with power amplifying circuit |
| CN104240526A (en) * | 2014-08-26 | 2014-12-24 | 无锡市恒通智能交通设施有限公司 | Intelligent traffic sign board with amplifying circuit |
| KR20210010220A (en) * | 2019-07-19 | 2021-01-27 | 에스케이텔레콤 주식회사 | Intelligent transport server and communication method thereof |
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