KR20010053697A - System and method for transmitting a traffic information using a FM DAta Radio Channel - Google Patents

Abstract

PURPOSE: A system and method for transmitting traffic information using FM DARC is provided to reduce information use fee by adding the traffic information to audio signal for general broadcasting within FM DARC band. CONSTITUTION: The traffic information collecting server(100) collects one or more traffic informations changed in real time. The terminal(200) for transmitting and receiving the information receives the traffic informations through Internet or dedicated lines. The traffic information uniting server(300) applies the collected traffic information to one rule to unite and process them. The FM DARC transmission server(400) processes and outputs the united traffic informations to agree with the FM DARC transmission specification. The FM DARC transmitting part(500) encoding-combines the processed traffic information and the audio signal for general broadcasting to transmit them.

Description

System and method for transmitting a traffic information using a FM DAta Radio Channel}

The present invention relates to a traffic information transmission system and method, and more particularly, to F. M. D. R. for adding traffic information to a broadcast audio signal for transmission of information in an FM bandwidth. The present invention relates to a traffic information transmission system and method using FM (DARC).

In general, in order to obtain traffic information for a specific section at a time desired by a user who wants to be provided with traffic information, the following limitations have been involved with existing communication means.

First of all, there is no information fee through roadside or outdoor installations, but there is an advantage that can be provided to an unspecified number of people. However, the place where the user obtains information is limited to a certain point and cannot provide information on the section desired by the individual. There are disadvantages.

Secondly, the information provided in the ARS format or the text display format can provide traffic information for a desired section of the user, but there is a disadvantage in that the burden of information usage fee is high.

Third, there is an advantage in that there is no information fee for listening to the voice information of the radio, but there is a disadvantage that it is difficult to obtain information of a desired section at a desired time.

With this in mind, by providing multiplexing and transmitting various additional information to a general broadcast radio signal, the user side is provided with additional information at a lower cost and in an easier way.

In general, the FM additional broadcasting system transmits a radio digital signal to a listener by adding a radio digital system signal (hereinafter referred to as RDS) or a data radio channel (DARC) signal. It is a broadcasting system for providing a variety of information in addition to listening to the radio.

The waveform diagram of the FM additional broadcast signal is described below.

FIG. 1 is a waveform of an FM baseband, in which an RDS signal and a DARC signal are loaded to be applied to information transmission of an FM additional broadcasting system in addition to an audio signal (L + R, LR) and a pilot signal (pilot). to be.

In this case, the RDS signal is a modulated data signal of 1,187.5bps using DBPSK method. The subcarrier frequency is 57 kHz, the subcarrier level is 1.3 to 10%, and the (26, 16) shortened cyclic code is used for error correction during data transmission. use.

In addition, the DARC signal modulates a 16Kbps digital signal according to the level of the difference (LR) signal between the L-channel audio signal and the R-channel audio signal, thereby modulating minimum shift keying (MSK) and a band pass filter (BPF). The subcarrier is 76 kHz, the level of the subcarrier is 4 to 10% according to the LR signal level, and (272, 190) short-circuit codes are used for error correction during data transmission and reception.

Accordingly, the technology and the problem of the present invention have been made in view of this point, and the object of the present invention is to add FM DARC which can reduce the burden of information usage fee by adding traffic information which is changed in real time together with the general broadcasting audio signal in the FM DARC band. It is to provide a traffic information transmission system using.

In addition, another object of the present invention is to provide a traffic information transmission system using FM DARC that can be flexibly applied to a car navigation system (CNS) or a mobile communication terminal by applying a code method instead of a conventional text method. It is.

In addition, another object of the present invention is to provide a traffic information transmission system using FM DARC that can obtain information that changes at any time for a desired section at a user desired time.

In addition, another object of the present invention is to provide a traffic information transmission system using FM DARC that can efficiently transmit more information of more areas by accommodating all traffic information of one section in one packet of the FM DARC standard.

In addition, another object of the present invention is to provide a traffic information transmission system using FM DARC that can accommodate the node ID method and the link ID method mode for providing traffic information.

In addition, another object of the present invention is to provide a traffic information transmission method using FM DARC that can realize each of the above system.

1 is a diagram for explaining a baseband frequency spectrum to which an RDS signal and a DARC signal are added together.

2 is a view for explaining a traffic information transmission system using FM DARC according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining in detail the FM DARC transmission server of FIG. 2.

4 is a view for explaining the FM DARC transmitting unit of FIG. 2 described above.

5 is a view for explaining a frame structure of the FM DARC scheme for transmitting traffic information according to an embodiment of the present invention.

6 is a diagram illustrating a node system and a link system for a section to which traffic information is to be transmitted according to the present invention.

7 is a traffic information transmission format of a link system according to an embodiment of the present invention.

8A to 8I are views for explaining the above-described FIG. 7 in more detail.

9 is a traffic information transmission format of a node system according to another embodiment of the present invention.

10A to 10J are views for explaining the above-described FIG. 9 in more detail.

11 is a flowchart illustrating a traffic information transmission method using FM DARC according to an embodiment of the present invention.

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

100: traffic information collection server 200: terminal for transmitting and receiving information

300: traffic information integration server 400: FM DARC transmission server

410: external data receiver 420: data converter

430: encoder transmission / control unit 500: FM DARC transmission unit

510: audio synthesizer 520: stereo generator / limiter

530: DARC encoder 540: high frequency generator

550: high frequency transmission unit 560: FM generator

570: transmitting unit

Traffic information transmission system using FM DARC according to one feature for realizing the above object,

A traffic information collection server unit for collecting at least one traffic information in real time;

An information transmitting / receiving terminal unit receiving and collecting the collected traffic information through the Internet or a dedicated line;

A traffic information integration server which integrates the collected traffic information into one rule and processes the integrated information;

An FMDARC transmission server which processes and outputs the integrated processed traffic information into an FM DARC transmission protocol; And

And an FM DARC transmitter for encoding and combining the broadcast audio signal provided from the outside and the traffic information processed according to the FM DARC transmission protocol.

In addition, the additional information transmission method using the FM DARC according to one feature for realizing the above object,

(Iii) collecting at least one traffic information that changes in real time;

(Ii) integrating traffic information collected through the various routes;

(Iii) filing the integrated traffic information;

(Iii) formatting the filed traffic information into information for DARC;

(Iv) multiplexing the formatted DARC information and the broadcast audio signal into data link layer information;

(Iii) converting the data layer information into physical layer information; And

(Iv) FM-modulating the physical layer information and wirelessly transmitting the same.

According to the traffic information transmission system and method using the FM DARC, a huge amount of information can be efficiently transmitted by transmitting the coded traffic information using the FM DARC. Can be obtained.

Then, embodiments will be described so that those skilled in the art can easily implement the present invention.

2 is a view for explaining a traffic information transmission system using FM DARC according to an embodiment of the present invention.

As shown in Figure 2, the traffic information transmission system using the FM DARC according to an embodiment of the present invention, the traffic information collection server unit 100, information transmission and reception terminal 200, traffic information integration server 300, FM And a DARC transmission server 400 and an FM DARC transmitter 500.

The traffic information collecting server unit 100 includes a plurality of traffic information collecting servers 110, 120,..., 1N0 for collecting traffic information through various routes, and collects the collected traffic information in real time on the Internet or a dedicated line. It provides to the terminal for information transmission and reception 200 through.

The terminal 200 for transmitting and receiving information including a router or a hub receives various traffic information collected from the plurality of traffic information collecting servers 110, 120,..., 1N0 and collects the traffic information. It provides to the information integration server 300.

The traffic information integration server 300 properly processes the delivered traffic information to generate accurate traffic information for each section or node, and provides the same to the FM DARC transmission server 400. In this case, since traffic information of one section or node may be transmitted from different traffic information collection servers, different types of information may also be transmitted in different contents even when expressing the same traffic congestion phenomenon. Process traffic information in different forms and content in the same format.

The FM DARC transmission server 400 processes the traffic information processed from the traffic information integration server 300 into the traffic information transmission protocol proposed in the present invention and then provides the FM DARC transmission unit 500.

FIG. 3 is a diagram for explaining in detail the FM DARC transmission server of FIG. 2.

2 and 3, the FM DARC transmission server 400 includes an external data receiver 410, a data converter 420, and an encoder transmitter / control unit 430 to operate as an independent thread. And you can see the situation between each component.

The external data receiver 410 receives the traffic information from the traffic information integration server 300 and stores the traffic information as a file, and provides the stored traffic information file to the data converter 420 with notification of the reception of the traffic information. Here, the external data receiver 410 has been described as an example of receiving traffic information from the traffic information integration server 300, but may directly receive traffic information from the traffic information collection server 100.

The data converter 420 reads the traffic information file stored from the external data receiver 410 and converts it to the traffic information format for the FM DARC according to the notification of the external data receiver 410, and converts the converted traffic information format for the FM DARC. With the notification of the traffic information has been provided to the encoder transmission and control unit 430.

The encoder transmission and control unit 430 reads the traffic information file formatted from the data conversion unit 430 according to the notification of the data conversion unit 420, configures the frame for the FM DARC described in the present invention, and then the FM DARC transmission unit ( 500).

4 is a view for explaining the FM DARC transmitting unit of FIG. 2 described above.

2 and 4, the FM DARC transmitter 500 according to the embodiment of the present invention includes an audio synthesizer 510, a stereo generator / limiter 520, a DARC encoder 530, a high frequency generator ( 540, a high frequency transmitter 550, an FM generator 560, and a transmitter 570.

The audio synthesizing unit 510 receives a plurality of audio signals from the outside, synthesizes the audio signals, and provides the audio signals L / R of the L channel and the R channel to the stereo generator / limiter 520.

The stereo generator / limiter 520 provides the DARC encoder 530 with an audio signal and a pilot signal of the L / R channel provided from the audio synthesizer 510.

DARC encoder 530 receives the traffic information data of the data layer (Layer2) from the FM DARC transmission server 400, audio signals (L / R) and pilot of the L channel and R channel from the stereo generator / limiter 520 The signal is received and multiplexed to convert traffic information of the physical layer Layer1, which occupies the bottom portion of the OSI reference model, and the converted multiple signal is provided to the stereo generator / limiter 520.

The stereo generator / limiter 520, which has received the converted multiple signals, provides it to the high frequency generator (M / W Tx) 540, and the high frequency generator 540 transmits the provided high frequency converted multiple signals to the high frequency transmitter (M). / W Rx) (550). At this time, the high frequency multiplex signal provided to the high frequency transmitter 550 is FM modulated via the FM generator 560 and wirelessly transmitted through the transmitter 570.

5 is a view for explaining a frame structure of the FM DARC scheme for transmitting traffic information according to an embodiment of the present invention.

As shown in FIG. 5, one frame of the FM DARC scheme for transmitting traffic information according to an embodiment of the present invention includes 190 information blocks composed of 288 bits and 82 parity blocks composed of 288 bits.

Each information block is composed of a 16-bit block identification code, a 176-bit data packet, a 14-bit Cyclic Redundancy Check (CRC) code, and an 82-bit parity. Each parity block consists of a 16-bit block identification code and 272 bits of parity.

In general, the data link layer serves as a data set for transmitting all data packets from the upper layer to the physical layer where the actual data transmission is performed. In this case, the information of the header added to the data packet is used for various information required for data transmission in the network. Create a CRC to record the information so that it can be used as a reference for the reception of data. The main function of the data link layer is to send the completed data packet from the upper layer to the physical, which is the final transport layer, without error. When there is no reception completion message at the receiving side Performs retransmission of the data. In this way, error checking of data reception of the data link layer is performed by checking the CRC of the packet. When there is an error of the CRC, the transmission side is requested to retransmit. By specifying the other computer to receive data from other functions of the data link layer, the correct transmission is executed.

6 is a diagram illustrating a node system and a link system for a section to which traffic information is to be transmitted according to the present invention.

As shown in FIG. 6, a node is a division point for dividing a road on an electronic digital map, for example, an intersection (crossroad) or a three-way street, and a link is a basic unit for receiving traffic information. It consists of a start node, an end node, and the interval between two nodes.

First, in an embodiment of the present invention, a traffic information transmission system will be described using a link system.

7 is a traffic information transmission format of a link system according to an embodiment of the present invention.

As shown in FIG. 7, the traffic information transmission format of the link system according to the embodiment of the present invention has two bytes of prefixes (Byte 1, 2) and 18 bytes of traffic information in order to increase data transmission efficiency. (Byte 3 to 20) and 2-byte CRC (Byte 21, 22) information are transmitted in one packet. In this case, the CRC information uses DARC Layer4 CRC (CRC 16) for the 21 st through 22 bytes.

FIG. 8A is a diagram for describing the prefix of the data block shown in FIG. 7.

As shown in Fig. 8A, the first byte (Byte 1) of the two-byte prefix includes two bits of update flags (B7 and B6), one bit of information termination information (B5), and one bit of decoding identification information (B4). ) And 4-bit service identification information (B0 to B3), and the second byte (Byte 2) is a 4-bit data packet number (B4 to B7) and a 4-bit data group number (B0 to B3). Is done.

More specifically, the update flag has a sequential value in the order of '00' → '01' → '10' → '11' → '00' → ‥‥ when the information is updated, and the information ending information indicates that the traffic information Since it is a link ID scheme represented in one packet, it always has a value of 1, the decoding identification information is 0, and the service identification code of the service identification information is 7 (B3: 0, B2: 1, B1: 1, B0: Allocate 1).

FIG. 8B is a diagram for describing a third byte of the data block shown in FIG. 7.

As shown in Fig. 8B, 1-bit ID system, 4-bit reserved area, 1-bit emergency information, 1-bit additional information, 1 of the third byte (Byte 3) of the data block indicating the traffic information transfer flag, 1 It consists of character information of bits.

More specifically, the character information B0 is a format used when text needs to be delivered to the link. This bit indicates whether there is text related to the link in the traffic information area among the text service area (service identification: 2), and this bit and text service can be used when the text related to the link is required. In this case, when the character information is '0', there is no corresponding text, and when the character information is 1, it indicates that there is text related to the link.

In addition, the additional information (B1) is a format for preparing a case of several kinds of accidents in one section, and determines whether the current traffic information is the only new traffic information or information to be added to the current traffic information. In this case, if the additional information is '0', the traffic information of the broadcasting packet is updated with the latest traffic information, and if the additional information is '1', the traffic information of the broadcasting packet is existing. As information to be added to the traffic information, it is added to the traffic information of the link.

In addition, the emergency information (B2) determines whether the traffic information of the packet being broadcast is emergency information or general information. If the emergency information is '0', the general information is used. When the emergency information is '1', Indicates emergency information.

In the traffic information ID system B7, '0' represents a link ID system and '1' represents a node ID system.

FIG. 8C is a diagram for describing fourth to twelfth bytes of the data block shown in FIG. 7.

As shown in Fig. 8C, the fourth byte (Byte 4) of the data block is a reserved area, and the fifth to twelfth bytes (Byte 5 to Byte 12) are link ID information.

FIG. 8D is a diagram for explaining the thirteenth and fourteenth bytes of the data block shown in FIG.

As shown in Fig. 8D, thirteenth and fourteenth bytes (Bytes 13 and 14) of the data block indicate the time at which the traffic information currently being displayed has occurred.

More specifically, 5 bits (B7 to B3) of the 13th and 14 bytes (Bytes 13 and 14) represent the date with 5 bits (B2 to B0 and B7 to B6) with the hour, and 5 bits (B5 to B0) with the minute. Information indicating If there is no information, set it to '0'.

8E is a diagram for describing the fifteenth byte of the data block shown in FIG. 7.

As shown in FIG. 8E, the upper 2 bits of the 15th byte (Byte 15) of the data block indicating the pass time of the corresponding link section are information indicating unit division, and the lower 6 bits are information representing the section passing time. It is 1 minute unit.

FIG. 8F is a diagram for describing the sixteenth byte of the data block shown in FIG. 7.

As shown in Fig. 8F, the upper two bits (B7, B6) of the sixteenth byte (Byte 16) of the data block representing the context information indicate the classification code, and the lower six bits (B5-B0) indicate the traffic information according to the classification. However, in the present invention, only the classification related to the speed is defined, and the rest is left as a reserved area. More specifically, in a 2-bit classification code, '00' is speed information, '01' and '10' are reserved areas, and '11' is null information. In this case, when the classification code is the speed information, the lower 6 bits (B5 to B0) represent binary code values in units of 3 km.

8G is a diagram for describing the seventeenth byte of the data block shown in FIG. 7.

As shown in Fig. 8G, the upper four bits of the seventeenth byte (Byte 17) of the data block indicating the cause information indicate large classification traffic information, and the lower four bits indicate small classification traffic information.

The upper four bits of the eighteenth byte indicating the cause information indicate large classification traffic information, and the lower four bits indicate small classification traffic information.

In more detail, the large-class traffic information consists of 4 bits of data to sequentially indicate no cause information, accident information, construction information, fire information, etc., and the small-class traffic information consists of four bits of data to represent each of the above-mentioned large-class traffic information. Traffic information for explaining in more detail. For example, if the classification traffic information is accident information ('0001'), the classification information is no cause when the small classification traffic information is '0000', the contact information is '0001', and the collision information is '0010'. In the case of '0011', collision accident information is displayed, in case of '0100', life accident information is displayed, and in case of '0101', the overturn accident information is displayed.

FIG. 8H is a diagram for describing the eighteenth and nineteenth bytes of the data block shown in FIG. 7.

As shown in FIG. 8H, the two most significant bits of the 18th byte (Byte 18) of the data block indicating the location where the traffic situation occurred within the section indicate the distance unit, and the sixth least significant bit indicates the starting position. The maximum significant bits of two bits of the nineteenth byte (Byte 19) of the data block indicate interval information, and the minimum significant bits of six bits indicate the end position.

More specifically, '00' is 10m and '01' is 100m in the section information of the upper two bits B7 and B6 of the 18th byte indicating the distance unit of the location where the traffic condition occurred. , '10' is 1km and '11' is reserved area.

In addition, the start position information, which is the lower four bits (B5 to B0) of the eighteenth byte (Byte 18), represents a distance from the start point of the link to the occurrence point of the position where the situation occurs as a binary code value.

In addition, '00' represents one point, '01' represents some section, and '10' represents all sections of the information on the section in which the traffic state of the 19th byte (Byte 19), which is the upper two bits (B7, B6), occurred. '11' represents no information. In this case, the unit corresponds to both the start position and the end position.

The end position information, which is the lower four bits B5 to B0 of the nineteenth byte Byte 19, is a binary code value indicating the distance from the start point of the link to the occurrence point where the situation is finished. This position is invalid if the interval information bit is set for one interval.

FIG. 8I is a diagram for describing a twentieth byte of the data block shown in FIG. 7.

As shown in FIG. 8I, the lane information of the 20th byte representing the information on the lane of the link is set to '1' in the lane when the road condition is generated in a specific lane. The seventh bit, which is an effective bit, represents eight or more lanes, and the seventh to first lanes are sequentially displayed from the sixth bit to the zeroth bit. At this time, if it is '0x00h', there is no information. If it is '0xFFh', it corresponds to the tram line regardless of the road size.

In the above, the structure of data for transmitting traffic information by a link system according to an embodiment of the present invention has been described.

Next, a structure of data for transmitting traffic information using a node system according to another embodiment of the present invention will be described.

9 is a traffic information transmission format of a node system according to another embodiment of the present invention.

As shown in Fig. 9, the traffic information transmission format of the node system has a two-byte prefix (Byte 1, 2), a one-byte status flag (Byte 3), and a five-byte viewpoint node ID (Byte) in order to improve transmission efficiency. 4 to 8), 5 byte endpoint node ID (Byte 9 to 13), 2 byte information time (Byte 14, 15), 1 byte TT (Byte 16), 1 byte context information (Byte 17), 1 It consists of byte cause information (Byte 18), two bytes of status information (Bytes 19 and 20), and two bytes of CRC information (Bytes 21 and 22). At this time, the CRC information uses DARC Layer4 CRC (CRC 16) for the 21st and 22nd bytes.

FIG. 10A is a diagram for describing the prefix of the data block shown in FIG. 9.

As shown in Fig. 10A, the first byte (Byte 1) of the byte prefix includes two bits of update flags (B7 and B6), one bit of information termination information (B5), and one bit of decoding identification information (B4). And 4-bit service identification information (B0 to B3), and the second byte (Byte 2) consists of a 4-bit data packet number (B4 to B7) and a 4-bit data group number (B0 to B3). .

More specifically, the update flag has a sequential value in the order of '00' → '01' → '10' → '11' → '00' → ‥‥ when the information is updated, and the information ending information indicates that traffic information Since it is a link ID scheme represented in 1 packet, it always has a value of 1, the decoding identification information is 0, and the service identification code of the service identification information is 7 (B3: 0, B2: 1, B1: 1, B0: Allocate 1).

FIG. 10B is a diagram for describing a third byte of the data block shown in FIG. 9.

As shown in Fig. 10B, one-bit ID system B7, one-bit direction information B6, and three-bit reserved area B5 of the third byte Byte 3 of the data block indicating the traffic information transfer flag. 3), one bit of emergency information B2, one bit of additional information B1, and one bit of character information B0.

In more detail, the character information B0 is a format used when text needs to be transmitted in a corresponding section. This bit indicates whether there is text related to the corresponding section in the traffic information area among the text service area (service identification: 2), and this bit and the text service can be used when the text related to the corresponding section is required. In this case, when the character information is '0', there is no corresponding text, and when the character information is 1, it indicates that there is text related to the corresponding node.

In addition, the additional information (B1) is a format for preparing a case of several kinds of accidents in one section, and determines whether the current traffic information is the only new traffic information or information to be added to the current traffic information. In this case, if the additional information is '0', the traffic information of the broadcasting packet is updated with the latest traffic information, and if the additional information is '1', the traffic information of the broadcasting packet is updated. Information to be added to the traffic information, which is added to the traffic information of the node.

In addition, the emergency information (B2) determines whether the traffic information of the broadcast packet is information that is urgent or general information. If the emergency information is '0', general information is used, and when the emergency information is '1', Indicates emergency information.

The direction information B6 indicates traffic information in the forward direction and the reverse direction, and is set to '1' when the forward direction and the reverse direction are the same, and to '0' when the direction information is the same.

In the traffic information ID system B7, '0' represents a link ID system and '1' represents a node ID system.

FIG. 10C is a view for explaining the fourth to eighth bytes of the data block shown in FIG. 9, and FIG. 10D is a view for explaining the ninth to thirteenth bytes of the data block shown in FIG. 9.

As shown in Figs. 10C to 10D, the fourth to eighth bytes Byte 4 to 8 are viewpoint node ID information, and the ninth to thirteenth bytes Byte 9 to 13 are endpoint node ID information.

FIG. 10E is a diagram for describing the fourteenth to fifteenth bytes of the data block shown in FIG. 9.

As shown in Fig. 10E, the fourteenth to fifteenth bytes Byte 14 and 15 indicate the time at which the traffic information currently displayed has occurred.

More specifically, of the fourteenth to fifteen bytes (Bytes 14 and 15), five bits (B7 to B3) indicate the date, five bits (B2 to B0, B7 to B6) indicate the hour, and five bits (B5 to B0) indicate the date. Information indicating minutes. If there is no information, set it to '0'.

FIG. 10F is a diagram for describing the sixteenth byte of the data block shown in FIG. 9.

As shown in FIG. 10F, the upper 2 bits of the 16th byte (Byte 16) indicating the pass time of the corresponding link section are information indicating unit division, and the lower 6 bits are information indicating the section passing time, and the default value is 1 minute unit. to be.

FIG. 10G is a diagram for describing the seventeenth byte of the data block shown in FIG. 9.

As shown in Fig. 10G, the upper two bits (B7, B6) of the seventeenth byte (Byte 17) of the data block representing the context information indicate the classification code, and the lower six bits (B5-B0) indicate the traffic information according to the classification. However, in the present invention, only the classification related to the speed is defined, and the rest is left as a reserved area. More specifically, in the upper two bits of the classification code, '00' is speed information, '01' and '10' are reserved areas, and '11' is null information. In this case, when the classification code is the speed information, the lower 6 bits (B5 to B0) represent binary code values in units of 3 km.

FIG. 10H is a diagram for describing an eighteenth byte of the data block shown in FIG. 9.

As shown in Fig. 10H, the upper four bits of the eighteenth byte indicating the cause information indicate large classification traffic information, and the lower four bits indicate small classification traffic information.

In more detail, the large-class traffic information consists of 4 bits of data to sequentially indicate no cause information, accident information, construction information, fire information, etc., and the small-class traffic information consists of four bits of data to represent each of the above-mentioned large-class traffic information. Traffic information for explaining in more detail. For example, if the classification traffic information is accident information ('0001'), the classification information is no cause when the small classification traffic information is '0000', the contact information is '0001', and the collision information is '0010'. In the case of '0011', collision accident information is displayed, in case of '0100', life accident information is displayed, and in case of '0101', the overturn accident information is displayed.

FIG. 10I is a diagram for describing the nineteenth byte of the data block shown in FIG. 9.

As shown in FIG. 10I, the upper two bits B7 and B6 represent distance units and the lower six bits B5 to B0 of the nineteenth byte indicating a location where a traffic condition occurs within a certain section. The code value indicates the location from which the situation occurred to the occurrence point.

More specifically, '00' is 10m, '01' is 100m, '10' is 1km, and '11' is a reserved area in the section information of the upper two bits B7 and B6.

FIG. 10J is a diagram for describing the twentieth byte of the data block shown in FIG. 9.

As shown in FIG. 10J, the lane information of the 20th byte (Byte 20) indicating information on the lane of the corresponding section sets '1' to the lane when the road situation is generated in a specific lane. The first to seventh lanes are sequentially displayed up to the lower 0th to 6th bits B0 to B6, and the seventh bit B7 represents eight or more lanes. In this case, '0x00h' means no information, and '0xFFh' means all lanes regardless of road size.

In the above, a traffic information transmission system using a link system according to another embodiment of the present invention has been described.

Hereinafter, the operation of the traffic information transmission system using the FM DARC according to an embodiment of the present invention.

11 is a flowchart illustrating a traffic information transmission method using FM DARC according to an embodiment of the present invention.

As shown in Fig. 2 and Fig. 11, first, a plurality of traffic information fluctuating in real time is collected from the plurality of traffic information collecting servers 110, 120, ..., 1N0 (step S10).

Subsequently, a plurality of traffic information collected through various paths are received and integrated through the Internet or a dedicated line (step S20). In this case, the reason for integrating the traffic information may be different according to the point of view of collecting the same information about the same traffic information, so it is integrated into one traffic information. For example, the same traffic situation on the intersection of A or on the road B may appear as 'traffic 100%' or 'traffic 90%' depending on the traffic operator's perspective. There is a need to integrate the traffic information input into one unified traffic information.

Subsequently, traffic information that can be input from a different viewpoint with respect to one piece of traffic information is integrated and filed (step S30), and the filed integrated traffic information is formatted into information for DARC (step S40).

Subsequently, the formatted traffic information for FM DARC and the audio signal for general broadcasting are multiplexed and converted into traffic information for data layer (step S50), and the converted traffic information for data layer is converted to traffic information for physical layer (step S60). .

Subsequently, the physical layer traffic information is FM-modulated and wirelessly transmitted (step S70).

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

As described above, according to the present invention, by collecting various traffic information that is changed in real time and adding the broadcast audio signal to the FM DARC band, it is possible to reduce the burden of traffic information charges that may be imposed on the information listener.

In addition, by applying a code method instead of the existing text method, it can be flexibly applied to a car navigation system (CNS) or a mobile communication terminal.

In addition, an information user who wants to receive traffic information in real time may acquire traffic information that changes at any time for a desired section at a desired time, for example, a jam time, a jam level, a cause of jam, and the like.

In addition, by receiving and transmitting all the traffic information about the intersection of the road intersection or the road start point and the end point of the road within a single packet of the frame frame for FM DARC, it is possible to efficiently transmit more information in more areas.

In addition, the traffic information providing method may accommodate both the link ID method for representing the traffic information collection section as one ID and the node ID method for expressing the traffic information collection section as the start node and the end node.

Claims (12)

A traffic information collection server unit configured to collect at least one traffic information variable in real time; An information transmitting / receiving terminal unit receiving and collecting the collected traffic information through the Internet or a dedicated line; A traffic information integration server which integrates the collected traffic information into one rule and processes the integrated information; An FM DARC transmission server configured to output the integrated processed traffic information by using an FM DARC transmission protocol; And And a FM DARC transmitter for encoding and combining broadcast audio signals provided from the outside and traffic information processed according to the FM DARC transmission protocol and transmitting them wirelessly. The method of claim 1, wherein the FM DARC transmission server, An external data receiver configured to store the traffic information as a file and output a first notification message as traffic information is provided from the traffic information integration server; A data converter configured to read the stored traffic information file and convert the stored traffic information file into an FM DARC traffic information format according to the input of the first notification message, and output a second notification message; And And an encoder transmitter and a controller for outputting the converted traffic information format data for the FM DARC as the second notification message is input. The traffic information transmission system using FM DARC according to claim 2, wherein the traffic information is further provided from a traffic information collection server unit. The method of claim 1, wherein the traffic information, Traffic information transmission system using FM DARC, characterized in that the traffic information by the link system consisting of the start node of the road and the end node of the road. According to claim 4, The traffic information by the link system, Transmitting traffic information using FM DARC, including status flag, link ID information, occurrence time information of currently appearing traffic information, passing time information of corresponding link section, context information, cause information, situation information and lane information system. The method of claim 1, wherein the traffic information, Traffic information transmission system using FM DARC, characterized in that the traffic information according to the node system according to the intersection of the road. According to claim 6, The traffic information by the node system, Traffic using FM DARC, which includes status flag, node start point ID information, node end point ID information, occurrence time information of currently appearing traffic information, passage time information, context information, cause information and situation information of the corresponding node. Information transmission system. (Iii) collecting at least one traffic information that changes in real time; (Ii) integrating traffic information collected through the various routes; (Iii) filing the integrated traffic information; (Iii) formatting the filed traffic information into information for DARC; (Iv) multiplexing the formatted DARC information and the broadcast audio signal into data link layer information; (Iii) converting the data layer information into physical layer information; And (Iii) FM modulation of the physical layer information and transmitting the radio information by using FM DARC. The method of claim 8, wherein the traffic information, Traffic information transmission method using FM DARC, characterized in that the traffic information for the link consisting of the start node of the road and the end node of the road. The traffic information according to claim 9, wherein Transmitting traffic information using FM DARC, including status flag, link ID information, occurrence time information of currently appearing traffic information, passing time information of corresponding link section, context information, cause information, situation information and lane information Way. The method of claim 8, wherein the traffic information, Traffic information transmission method using FM DARC, characterized in that the traffic information according to the node system according to the intersection of the first road and the second road. The method of claim 11, wherein the traffic information by the node system, Traffic using FM DARC, which includes status flag, node start point ID information, node end point ID information, occurrence time information of currently appearing traffic information, passage time information, context information, cause information and situation information of the corresponding node. How to send information.