KR20040080884A - The realtime traffic information service on graphic using GPS and FM DARC - Google Patents

Abstract

PURPOSE: A real time graphic traffic information service system using GPS and FM DARC is provided to obtain traffic information in real time and to solve inefficient traffic information transmission function. CONSTITUTION: According to the transmitter system, a FM DARC traffic information providing center(101) collects traffic information from a traffic information data base(102) of each traffic information source and stores it on a FM DARC data base(103) to provide real time graphic traffic information. Road ID and up line and down line classification and color code according to traffic condition and vehicle speed are added to the data collected to provide FM DARC real time graphic traffic information and then the data are stored again. The data is processed to have a constant packet by setting an application ID of a packet application of the FM DARC to provide a graphic traffic map service. A LMSK modulation is performed where modulation rate is changed according to an audio level of a FM radio. Then, the traffic information is transmitted through a FM transmitter unit(105) together with the FM radio.

Description

Real time traffic information service on graphic using GPS and FM DARC}

The FM supplementary service is a service that sends audio, current traffic information, news, weather forecast, stock information, DGPS (high precision positioning system) information, and program information to the current FM broadcast.

There are RDS and DARC schemes for FM supplementary services, and they have been developed and commercialized mainly in Europe and Japan, respectively. In Japan, FM supplementary broadcasting is widely used as a nickname of "visible radio."

The DARC method has the advantage of transmitting much more information than the RDS, such that the information transmission rate is 10 times higher than that of the RDS.

Conventional traffic information services using FM DARC are mostly provided in the form of letters, so it is difficult to quickly recognize the traffic situation. Therefore, FM DARC traffic information text service is insufficient to effectively solve the traffic problem.

There are cases where patents and utility models for traffic information have been filed and registered in Japan as well as in Korea. At first, the traffic information providing method is divided into three types: character type, simple map type, and navigation type. Text and navigation services are provided in Korea and Japan, but simple map-type traffic information is only available in Japan. Such a simple map-type traffic information providing method provided in Japan is disclosed in FM 8-185596 "FM multiple broadcasting receiver" and Japanese Patent 8-251125 "FM multiple information high speed drawing apparatus". It is a device that provides traffic information by receiving traffic information from a microcontroller or processor, processing signals, storing data, and calling traffic maps from an image memory to update and display information on nodes and links. The present invention also relates to an apparatus for selecting desired traffic information using an external control input port.

However, such a simple map-type traffic information providing apparatus requires an operation to receive the desired traffic information while driving, so there is a risk of an accident and inconvenience in finding desired traffic information.

In addition, since a traffic map created to provide graphic traffic information, information on nodes and links for each road, and an already displayed traffic map are all stored in a memory, a large memory is required.

Above all, when creating traffic maps, nodes and links are defined by code and various information is added, which makes it difficult to service various information other than traffic information because the transmission capacity occupies about 70% of the total data transmission.

Characteristic traffic information providing method has the advantage that the display device is simple and takes up less memory, but the recognition rate of the traffic information is lowered and there is a risk of a traffic accident because it is directly operated to find the desired traffic information. Uncomfortable.

The navigation type traffic information providing method requires various auxiliary devices such as map data reading device, video and audio device in addition to FM DARC receiving terminal, and it requires considerable cost to purchase the product. It is inconvenient to set up or get the information you want.

The present invention seeks to provide a new type of traffic information transmission method and algorithm in order to solve the above-mentioned problems.

The present invention can easily obtain the traffic information in real time by changing the color to correspond to the traffic conditions on the road of a simple map, the traffic information is automatically applied according to the position of the current vehicle (receiver) through a simple program using GPS By displaying the traffic map, there are problems such as unnecessary operation of the conventional technology, resulting in inconvenience of driving and concern about traffic accident, complexity and high price of the vehicle navigation device, and inefficient traffic information transmission function of the text traffic information service. To solve this problem.

In the transmission system, the ID of the road for displaying the traffic map, the up-down discrimination code, and the color code according to the traffic situation are generated from the collected traffic information, and the application ID of the packet application of the FM DARC is provided to provide the graphic traffic map service. It is configured to process data to have a constant packet by setting, to perform LMSK modulation whose modulation rate varies according to the audio level (LR) of the FM radio, and to be transmitted through the transmitting antenna via the FM modulation and transmitting unit.

In a receiving system, an FM signal including FM DARC data is received from an antenna of a receiver, the FM signal is transmitted to the FM DARC Decoder through the RF amplifier and the IF unit, the FM DARC data is extracted through the FM DARC Decoder, and the microcomputer receives the PLL and Control FM DARC Decoder, extract graphic traffic data, process it according to the format required by MCU, and deliver it.

In the first embodiment, the MCU stores the graphic traffic data transmitted, receives the latitude and longitude coordinate data of the position of the vehicle from the GPS receiver, and calls the corresponding graphic traffic map to display the road ID and the traffic status color code of the graphic traffic data. You can change the road color on the traffic map to display it,

In the second embodiment, the MCU stores the graphic traffic data transmitted by the MCU and calls the traffic map of the memory where the graphic traffic map is stored, and changes the road color of the traffic map according to the road ID, the up-down discrimination code, and the traffic condition color code, and stores the data again. And receives the latitude and longitude coordinate data of the location of the vehicle from the GPS receiver to call and display the corresponding graphic traffic map.

Traffic received through FM DARC in the form of bitmap by defining road ID and up / down line for each road, tunnel, overpass, etc. in the background of land, water, road, tunnel, overpass, text (mark) Enter the latitude and longitude coordinates of each corner of the traffic map to change the color of the road according to the road ID, up and down classification code and traffic status code in the information data, and to automatically display the traffic map according to the location of the vehicle. In order to solve the problem of the boundary point between maps, it is extended to a certain area than the original traffic map.

In addition, by using the GPS function to configure a receiving terminal to receive the general information such as textual traffic information, advertisements and news for the area where the vehicle corresponds.

1 is a block diagram of a real-time graphical traffic information service using GPS and FM DARC.

2 is a block diagram of a transmission system for providing real-time graphical traffic information.

3 is a block diagram of a receiver capable of receiving and displaying real-time graphic traffic information using GPS and FM DARC.

4 is an example of a traffic map applied to provide graphical traffic information.

5 is an FM DARC service data format for providing graphic traffic information.

FIG. 6 is a flowchart of Embodiment 1 of displaying a traffic map corresponding to location information obtained through a GPS receiver after a road color on a traffic map is changed and stored by received traffic information in a program executed by a MCU of the receiver. .

FIG. 7 shows the color of the road map of the traffic map according to the traffic information obtained through FM DARC after calling the traffic map corresponding to the location information obtained through the GPS receiver from the traffic map stored in the graphic memory in the program executed by the MCU of the receiver. Is a flow chart of Embodiment 2 for changing and displaying.

8 is a flowchart illustrating a method of providing other types of traffic information in addition to real-time graphic traffic information and providing various information of an FM DARC service.

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

101: FM DARC Traffic Information Center for collecting and processing traffic information via FM DARC

102: Database for providing traffic information (databases of the National Police Agency, Traffic Information Center, Traffic Broadcasting, etc.)

103: FM DARC database that stores information collected for FM DARC service

104: Ad database for serving ads via FM DARC

105: FM transmitting unit for transmitting the processed data through the FM band frequency in the FM DARC traffic information providing center

201: FM DARC receiver for receiving FM DARC service

202: GPS receiver used to automatically display real-time graphical traffic information provided via FM DARC in the present invention

203: Screen display unit for displaying real-time graphic traffic information and various information

301: vehicle 302: GPS satellite

101-1: FM DARC Database 101-2: Programs Included with Transport Server

101-3: CPU Board of Encoder

101-4: ECC Board for Encoding Data Frame

101-5: Logic Controller for Scrambling Encoder's Framed Data

101-6, 101-7, 101-8, 101-9, 101-10: Modulator for obtaining LMSK signal

101-11: FM modulator for modulation with FM radio signals

105-1: FM transmitter 105-2: transmitting antenna

201-1: Receiver antenna 201-2: RF amplifier

201-3: Local Oscillator 201-4: IF Part

201-5: PLL (Phase Locked Loop) 201-6: FM DARC Decoder

201-7: Micro-Controller for extracting information from decoded data (hereinafter referred to as 'microcom')

201-8: Main Control Unit or Main Processor (MCU) for processing programs for full system control and display

201-9: Memory section for storing programs for processing real-time graphic traffic information and various information

201-10: Data memory section for storing FM DARC data

201-11: Traffic map memory unit (graphic memory unit) storing traffic maps used to provide real-time graphic traffic information

202-1: GPS Antenna 202-2: GPS Receiver

202-3: Interface for transmitting location information of the vehicle (receiver) from the GPS receiver to the MCU

203-1: Driver for Display Devices

203-2: display device

401: Road 402: Background

403: sea, river 404: lettering

For the configuration and detailed description of the "real-time graphic traffic information service using GPS and FM DARC" in the present invention will be described using the drawings.

1 is a block diagram of a real-time graphical traffic information service using GPS and FM DARC.

In order to provide real-time graphic traffic information, the FM DARC traffic information providing center 101 collects traffic information from the traffic information database 102 of each traffic information provider and stores the traffic information in the FM DARC database 103 and stores the FM DARC real-time. In order to provide graphic traffic information, the collected data is re-stored by assigning color codes of traffic conditions and vehicle speeds according to road ID and up / down classification codes, and application ID of FM DARC packet application to provide graphic traffic map service. Set to process the data to have a certain packet, LMSK modulation of the modulation rate is changed according to the audio level (LR) of the FM radio, and configured to be sent out with the FM radio through the FM transmitter 105,

The FM DARC receiver 201, the GPS receiver 202 and the screen display 203 are provided in the vehicle 301, and the real-time traffic information is received through the FM DARC receiver 201 to change the road color of the traffic map. At the same time, by using the GPS position information from the GPS satellite 302 is configured to display the corresponding traffic map on the screen display unit 203 according to the latitude and longitude coordinates of the vehicle calculated by the GPS receiver 202 to service.

2 is a block diagram of a transmission system for providing real-time graphical traffic information.

Collect data from the traffic information database 102 of the provider providing the traffic information and store it in the FM DARC database 101-1,

Real-time graphic traffic information data is delivered to the encoder through the transmission program 101-2 consisting of DB access program, FM DARC packet configuration program, and code transmission program to the transmission server.

Data is coded and framed to the FM DARC format through the CPU 101-3, ECC Board 101-4, and Logic Control 101-5 of the encoder, and from the input audio signal 101-7. The LMSK modulator 101-10 is used to automatically adjust the modulation rate of the DARC signal according to the audio level using the LR signal and the pilot signal.

The LMSK signal output through the LMSK modulator 101-10 is configured to be transmitted through the FM radio transmitter 105-1 and the antenna 105-2 via the FM modulator 101-11.

3 is a block diagram of a receiver capable of receiving and displaying real-time graphic traffic information using GPS and FM DARC. The receiver is composed of an FM DARC receiver 201, a GPS receiver 202 and a screen display, and is further configured as a memory unit for storing programs, data, and graphics.

The RF DARC antenna 201-1 receives an FM DARC signal in space, an RF amplifier 302-2 for amplifying a weak signal strength, a local oscillator 201-3 for lowering to an intermediate frequency, IF unit 201-4 for intermediate frequency processing, FM DARC Decoder 201-6, PLL 201-5 and FM DARC Decoder for extracting digital signals from analog signals and restoring the data coded in the transmitter. 201-6) to the location of the vehicle using the microcomputer 201-7 and GPS satellite 302 to control and extract the graphic traffic information data for processing according to the format required by the MCU 201-8. A GPS antenna 202-1 and a GPS receiver 202-2 for calculating the latitude and longitude coordinates for

Traffic for storing the graphic traffic information data transmitted from the FM DARC receiver 201, changing the road color of the traffic map according to the road ID, the up-down classification code, the traffic condition color code of the graphic traffic information data, and storing the traffic map. The MCU 201 stores a traffic map in a map memory, calls a graphic traffic map corresponding to the latitude and longitude coordinates of the vehicle transmitted from the GPS receiver 202-2, and transfers data on the traffic map to a display device. -8),

A display driver 203-1 and a display device 203-2 for displaying a traffic map.

4 is an example of a traffic map applied to provide graphical traffic information. As shown in FIG. 4, the land 402, the water 403, the letters 404, and the road 401 are set as a background.

The road 401 is classified into tunnels, overpasses, urban highways, etc., and displayed by color or in other forms such as dotted lines.

Each road 401 is given an ID and distinguished up and down, and these are set as variables and configured to change the color of the road according to traffic information (traffic conditions or vehicle speed, etc.) provided through the FM DARC.

Such a traffic map may be produced as a bitmap, or may be produced using a map editor.

5 is an FM DARC service data format for providing graphic traffic information. Graphic traffic in the FM DARC service data format always uses packet applications because it maintains a constant data length.

It is configured to transmit two or more pieces of traffic information data of a road ID, an up and down division code, and a traffic status code according to the length of the data, and to add and transmit CRC, Parity, and BIC.

FIG. 6 is a flowchart of Embodiment 1 of displaying a traffic map corresponding to location information obtained through a GPS receiver after a road color on a traffic map is changed and stored by received traffic information in a program executed by a MCU of the receiver. .

When the FM DARC receiver and the GPS receiver operate, information about the prestored FM DARC or GPS receiver is displayed or an advertisement is displayed while the terminals receive data (a), and the FM DARC receiver receives the data (b), Extracts graphical traffic information including road ID, up and down discrimination code, and traffic status color code (c), saves the extracted traffic information in data memory or updates it with recently received data (d), and saves the traffic map The road color of the traffic map from the memory is changed according to the received road ID, up and down identification code, and traffic condition color code (e) and stored (g), and at the same time, the GPS receiver receives GPS signals using GPS satellites. (f) location information data is input to extract the location of the vehicle (h) and to call the traffic map for the real-time graphical traffic information of the location information data (j), and The location information is configured to display (k) a 'graphical traffic information is applied traffic map, the call traffic from the memory map, and (i), the call traffic in the map screen including the longitude and latitude coordinates of the data.

7 shows a road of a traffic map according to the traffic information obtained through FM DARC after calling a traffic map corresponding to the location information obtained through the GPS receiver from the graphic memory in which the traffic map is already stored in the program executed by the MCU of the receiver. This is a flowchart of Embodiment 2 in which the color is changed and displayed.

When the FM DARC receiver and the GPS receiver are operated, information about the prestored FM DARC or GPS receiver is displayed or an advertisement is displayed while the terminals are receiving data (a), and the FM DARC receiver receives the data (b), Extract graphic traffic information including road ID, up and down discrimination code, and traffic status color code (c), and extract the traffic information in data memory or update with recently received data (ㅁ) and at the same time GPS receiver Location data is input to receive a GPS signal using GPS satellites (d), extract the location of the vehicle (d), and call a traffic map for real-time graphical traffic information (o) Call the 'traffic map without graphic traffic information' including the longitude and latitude coordinates as information data from the traffic map memory (g), Call the traffic information including the longitude and latitude coordinates from the data memory, change the color of the road by applying the road ID, up and down classification code, and the traffic status color code to the called traffic map. ), The traffic map is displayed on the screen.

8 is a flowchart illustrating a method of providing other types of traffic information in addition to real-time graphic traffic information and a method of providing various information of an FM DARC service.

Displaying information or advertisements about FM DARC while the FM DARC receiver is receiving data, and providing various information such as news / securities / weather including graphic traffic information and textual traffic information once the data reception is completed. Extract the data for the storage in the data memory, select according to the service mode desired by the user, each service is performed according to the selected mode.

In providing traffic information, emergency texts and accidents, road construction information, etc. can be scrolled at regular intervals in a simple text form through a single character, or the speed information of major roads and road sections can be provided in a text form. To find and provide the desired information (b) or to provide the graphic traffic information (c) in the present invention.

In the provision of other information, the user may select and receive the desired information from the data memory for the news / securities / weather, etc., or may be provided by displaying in simple text form and automatically scrolling (e). can do.

As such, the present invention provides more efficient traffic information by providing traffic information transmitted through the existing text-type FM DARC traffic information service in real-time graphic form and easily grasps the traffic situation of a desired region within a short time. In addition, it can reduce the enormous economic loss caused by the traffic jam by smoothly responding to the traffic situation.

In addition, in the case of the simple map-type service of Japan mentioned in the related art, there was a problem in that a user directly selects a button or a remote control of a terminal in order to obtain desired traffic information, and also selects a node / link for each road. Since information is provided, the volume of data used for providing traffic information occupies most of the FM DARC, which makes it difficult to service other additional information.

According to the present invention, the position of the vehicle is determined by GPS and the traffic information is provided in the form of a simplified traffic map according to the position, so that the user does not need to directly operate the vehicle. It may be sufficient to provide traffic information with a small data capacity so that various additional information may be provided.

And, since it is much cheaper than the traffic information service provided in a navigation form and is provided in a form similar to navigation, there is a possibility that it is commercialized more easily than a navigation type terminal.

In addition, by providing services such as weather, exchange rate, securities, etc. in addition to the graphic service for traffic information, more efficient additional service will be achieved, thereby helping to activate FM DARC service contents.

Claims (4)

In the transmission system, the FM DARC traffic information providing center collects traffic information from the traffic information database of each traffic information provider and stores it in the FM DARC database to provide real-time graphic traffic information. FM DARC Real-time graphic traffic information is collected and stored again by assigning road ID, up / down classification, traffic status and vehicle speed color code. In order to provide a graphic traffic map service, the application ID of the packet application of the FM DARC is set to process data to have a certain packet, LMSK modulation in which the modulation rate varies depending on the audio level of the FM radio, Real-time graphical traffic information providing and transmission system using FM DARC, characterized in that configured to be transmitted along with the FM radio through the FM transmitter Receives FM signal including FM DARC data from FM DARC receiving antenna, passes to RF DARC Decoder through RF amplification unit and IF unit, extracts FM DARC data through FM DARC Decoder, and microcomputer PLL and FM DARC Decoder Control, extract the graphic traffic data, process it according to the format required by the MCU, and deliver it. The MCU stores the graphic traffic data transmitted from the microcomputer, receives the latitude and longitude coordinate data of the location of the vehicle from the GPS receiver, calls the graphic traffic map corresponding to the location of the vehicle, and uses the road ID and the up and down directions of the graphic traffic data. Real-time graphic traffic information receiving system using GPS and FM DARC, characterized by automatically providing real-time graphic traffic information to the user by changing and displaying the road color of the traffic map according to the classification code and traffic condition color code. Receives FM signal including FM DARC data from FM DARC receiving antenna, passes to RF DARC Decoder through RF amplification unit and IF unit, extracts FM DARC data through FM DARC Decoder, and microcomputer PLL and FM DARC Decoder Control, extract the graphic traffic data, process it according to the format required by the MCU, and deliver it. The MCU saves the graphic traffic data transmitted from the microcomputer, calls the traffic map from the memory where the graphic traffic map is stored, changes the color of the road according to the road ID, the up / down discrimination code, the traffic color code, and saves it again. Real-time graphics using GPS and FM DARC, characterized in that the system receives the longitude and latitude coordinate data of the location of the vehicle from the vehicle and calls and displays the graphic traffic map corresponding to the location of the vehicle. Traffic Information Receiving System. Receives FM signal including FM DARC data from FM DARC receiving antenna, passes to RF DARC Decoder through RF amplifier and IF unit, extracts FM DARC data through FM DARC Decoder, and microcomputer PLL and FM DARC Decoder Control and extract DARC data, process it according to the format required by the MCU, and deliver it. The MCU stores DARC data transmitted from the microcomputer and receives the latitude and longitude coordinate data of the vehicle's position from the GPS receiver to automatically display traffic information or advertisements in a simple text form for the area corresponding to the vehicle's position. Receiving system having automatic side information display function using GPS and FM DARC.