KR20020054600A - Service supply apparatus for dedicated short range communication system - Google Patents

Abstract

PURPOSE: An apparatus for providing a service in a DSRC(Dedicated Short Range Communication) system is provided to extend a channel card in one DSRC base station according to channel capacity which is determined by various traffic information. CONSTITUTION: A DSRC base station(100) performs bidirectional communication with a plurality of DSRC terminals. A DSRC server(300) collects vehicle information and service request information from the DSRC base station(100) by using a DSRC leased network(200), manages the collected information, and transmits information corresponding to a service request to the DSRC base station(100). A DSRC router(400) is used for connecting the DSRC server(300) with internet(500). An ATIS(Advanced Traveler Information System) server(610), an ATMS(Advanced Traffic Management System) server(620), an APTS(Advanced Public Transportation System) server(630), a CVO(Commercial Vehicle Operation) server(640), and an AVHS(Advanced Vehicle and Highway System) server(650) are connected with the DSRC router(400) and the internet(500).

Description

SERVICE SUPPLY APPARATUS FOR DEDICATED SHORT RANGE COMMUNICATION SYSTEM}

The present invention relates to an intelligent transportation system, and more particularly, to a service providing apparatus of a short-range wireless dedicated communication system.

As the number of vehicles increases, wireless communication technology is integrated into traffic-related systems in order to suppress traffic congestion and the increase in logistics costs.

Conventionally, FM-DARC wireless communication, beacon wireless communication, cellular wireless communication and IMT-2000 wireless communication have been proposed as a wireless communication technology for incorporating traffic related systems.

The FM-DARC wireless communication method is a method of transmitting digital data using an existing FM broadcast channel. Since the transmission speed is up to 16kbps and the communication cell size is several tens of Km, the digital transceiver is implemented because it uses a wide area service and an existing broadcast channel. There is an easy advantage.

The beacon wireless communication method can provide convenience to the user through automatic parking fee settlement and parking available location designation when using the parking service because the two-way communication between the vehicle terminal and the roadside base station is possible.

The cellular wireless communication method uses a circuit communication method for providing a voice service to a vehicle driver even when moving.

The IMT-2000 wireless communication method is being developed as a communication method capable of providing a packet data service as well as a voice service.

However, the conventional technology using the FM-DARC wireless communication method is limited by the one-way service provided only downlink because it uses a broadcast channel, and the technology using the beacon wireless communication method supports multiple vehicle terminals and multiple accesses. Therefore, when two or more terminals simultaneously access a wireless channel in a cell, a link setup is not performed.

In addition, the technology using the conventional cellular wireless communication method increases the service cost because the user must keep the call state to receive information, and the technology using the IMT-2000 wireless communication method has a frequency bandwidth according to the service provided There is a problem that the frequency should be changed according to the service desired by the user.

In order to improve the above problems, an intelligent transport system (ITS) has recently been proposed, and an advanced travel information system (ATIS) and an advanced traffic management system (ATMS) according to application fields are provided. , Commercial vehicle operation (CVO), advanced public transportation system (APTS), and advanced vehicle and highway system (AVHS).

The intelligent traffic system implements a dedicated system to provide various services through collecting and distributing traffic information in real time, and a DSRC system is proposed as an example.

The DSRC system can accommodate various traffic services in one vehicle terminal, provide high speed packet communication by providing a stable data channel, communication in a narrow communication area and efficient use of radio resources, and voice synthesis. It provides a simple user interface for short text / image display, keypad input devices, and IC cards.

However, the conventional DSRC system accommodates only one frequency in the DSRC base station, and has a disadvantage in that it is difficult to provide various services in one DSRC base station because the DSRC base station is limited to a specific service.

In addition, the conventional DSRC system has a disadvantage in that the communication capacity that can be accommodated in the DSRC base station is limited because the DSRC base station allocates a channel in a time division multiple access (TDMA) scheme using only one frequency.

Accordingly, an object of the present invention is to provide a service providing apparatus of a short-range wireless dedicated communication system invented to expand a channel card in one DSRC base station corresponding to channel capacity determined by various traffic related information in order to improve the conventional problem. There is this.

1 is a block diagram of a DSRC system for an embodiment of the present invention.

2 is a signal flow diagram for providing an ATIS service in an embodiment of the present invention.

3 is a signal flow diagram for providing ATIS and ATM services in an embodiment of the invention.

Figure 4 is a signal flow diagram for the case of providing various services in an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: DSRC base station 300: DSRC server

400: DSRC router 610: ATIS server

620: ATMS server 630: CVO server

640: APTS server 650: AVHS server

The present invention provides a DSRC base station 100 for bidirectional communication with a plurality of DSRC terminals corresponding to each channel frequency by providing a plurality of channel cards for accommodating each channel frequency in order to achieve the above object, and the DSRC The base station 100 collects the vehicle-related information or service request information received from the DSRC terminal via the DSRC-dedicated network 200 and manages the collected information, and receives the information corresponding to the service request in the DSRC base station 100. DSRC server 300 for transmitting to the DSRC, DSRC router 400 for connecting the DSRC server 300 to the Internet network 500, the DSRC router 400 and the Internet network 500 is connected to the traffic ATIS server 610, ATMS server 620, APTS server 630, CVO server 640 for providing information, traffic management information, public transportation related information, freight transportation information, vehicle / road related information, respectively AVHS server 650 It is equipped with.

The DSRC base station 100 is an antenna router 120 for accommodating several channels as the antenna 110 for transmitting and receiving, a single carrier channel card for accommodating one high frequency carrier, and a TDMA / TDD for one carrier frequency. And a plurality of channel card units each having a single carrier logic card for accommodating the TDMA / FDD MAC protocol, and a DSRC dedicated network connection unit 140 for connecting the plurality of channel cards with the DSRC dedicated network 200. do.

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

1 is a configuration diagram of a DSRC system for an embodiment of the present invention, as shown therein, collecting vehicle-related information from a DSRC terminal (not shown) or requested information from the DSRC terminal (not shown). DSRC base station 100 performing bidirectional communication with the DSRC terminal to provide a, and the vehicle-related information or service request information received from the DSRC terminal in the DSRC base station 100 via the DSRC dedicated network 200 and A DSRC server 300 for transmitting the information corresponding to the service request to the DSRC base station 100 while managing the collected information, and a DSRC for connecting the DSRC server 300 to the Internet network 500. The router 400 is connected to the Internet network 500 to provide traffic information, traffic management information, public transportation related information, freight transportation related information, and vehicle / road related information to the DSRC server 300, respectively. ATIS server 610, ATMS server 620, APTS server 630, CVO server 640 and AVHS server 650 for the configuration.

The DSRC base station 100 is a transmission and reception antenna 110 that can accommodate multiple channels, an antenna sharer 120 that can share multiple channels with one antenna, and a single carrier channel for receiving one high frequency carrier wave. Channel card sections 131 to 133 each having a single carrier logic card for accommodating a MAC protocol of TDMA / TDD or TDMA / FDD for a card and one carrier frequency, and the plurality of channel cards 131 to 133, respectively. 133 is provided with a DSRC dedicated network connection unit 140 that can be connected to the DSRC dedicated network 200.

The channel card units 131 to 133 can be extended to up to eight channels according to service purposes, and each channel card unit 131 to 133 has a single carrier logic card 131-1 to 131-2, respectively. To configure.

The operation and the effect of the embodiment of the present invention configured as described above will be described with reference to FIGS.

First, FIG. 2 is a signal flowchart for providing an ATIS service using the DSRC base station 100 in a DSRC system. This process will be described below.

In FIG. 2, reference numeral 150 denotes an ATIS terminal.

When the user selects a desired service menu from the menus provided in the ATIS terminal 150, the ATIS terminal 150 requests the desired service information from the DSRC base station 100. However, it is assumed that the DSRC base station 100 is in a state in which only the channel card unit 131 operates among the plurality of channel card units 131 to 133 to use only one channel.

The channel card unit 131 receives the service request information from the ATIS terminal 150 and transmits it to the DSRC dedicated network connection unit 140. However, the DSRC dedicated network connection unit 140 may use the Ethernet port in the single carrier logic card 131-1 in the case of a short channel.

The DSRC dedicated network access unit 140 requests service information to the DSRC server 300 via the DSRC dedicated network 200.

The DSRC server 300 transmits information for accessing the Internet network 500 to the DSRC router 400.

The DSRC router 400 transmits an information request message to the ATIS server 610 via the internet network 500.

The ATIS server 610 analyzes the message received from the DSRC router 400 and processes the desired information by the ATIS terminal 150 to transmit the reply information to the DSRC router 400. The DSRC router 400 receiving this transmits the information to the DSRC server 300.

The DSRC server 300 checks the unique number (ID) of the DSRC base station 100 in order to transmit the desired information to the DSRC base station 100 requesting ATIS service, and then transmits the ATIS information via the DSRC dedicated network 200. The DSRC base station 100 transmits.

The DSRC base station 100 transmits data transmitted from the DSRC server 300 by the DSRC dedicated network access unit 140 provided therein to the channel card unit 131. The channel card unit 131 receiving the transmission transmits the ATIS information requested to the ATIS terminal 150 through the antenna router 120 and the antenna 110 for transmitting and receiving.

The ATIS terminal 150 displays the information received from the DSRC base station 100 on a display device (for example, an LCD monitor).

3 is a signal flow diagram for providing ATIS and ATM services in one base station 100 in a DSRC system. This process is described below.

However, it is assumed that the DSRC base station 100 has two channel card units 131 and 132 to accommodate channels for ATIS service and ATMS service.

When the user selects a desired service menu from the menus provided in the ATMS terminal 160, the ATMS terminal 160 transmits a request message for the desired information to the DSRC base station 100.

In this case, the DSRC base station 100 is the channel card unit 132 of the plurality of channel card units 131 to 133 is allocated for providing the ATMS service while the channel card unit 131 is allocated for the ATIS service. Assume that

The channel card unit 132 transmits the service request message transmitted from the ATMS terminal 160 to the DSRC dedicated network access unit 140.

The DSRC dedicated network access unit 140 multiplexes the signals transmitted from the ATIS channel card unit 131 and the ATMS channel card unit 131 and transmits the signals to the DSRC server 300 via the DSRC dedicated network 200.

The DSRC server 300 transmits a service request message to the DSRC router 400 to access the internet network 500.

The DSRC router 400 analyzes the service request message transmitted from the DSRC server 300 and processes the service request message into a form that can be recognized by the ATIS server 610 and the ATMS server 620 and then through the Internet network 500. The data is transmitted to the ATIS server 610 and the ATMS server 620.

The ATIS server 610 and ATMS server 620 analyzes the service request message transmitted from the DSRC router 400 and then retrieves the desired service information, and the DSRC router 400 can recognize the retrieved service information. After processing to transmit to the DSRC router 400 via the Internet network 500.

The DSRC router 400 collects and analyzes the service information received through the Internet network 500, processes the service information into a form recognizable by the DSRC server 300, and transmits the service information to the DSRC server 300.

The DSRC server 300 checks the unique number (ID) of the DSRC base station 100 requesting the service information from the DSRC router 400 and then transmits the DSRC base station 100 to the DSRC base station 100 via the DSRC dedicated network 200. do.

The DSRC base station 100 analyzes the data transmitted from the DSRC dedicated network access unit 140 provided therein by the DSRC server 300 to demultiplex and classify the ATIS service information and the ATMS service information, and classifies the classified information into a channel card. It sends to the unit (131) (132). That is, the DSRC dedicated network access unit 140 transmits the ATIS service information to the channel card unit 131 and the ATMS service information to the channel card unit 132.

The channel card units 131 and 132 process the received information into a form that can be recognized by the ATIS terminal 150 and the ATMS terminal 160 and transmits the received information to the antenna sharer 120.

The antenna router 120 collects and multiplexes the information received from the channel card units 131 and 132 and transmits the information to the ATIS terminal 150 and the ATMS terminal 160 through the antenna 110 for transmission and reception.

The ATIS terminal 150 and the ATMS terminal 160 display each information received from the DSRC base station 100 on a display device (for example, an LCD monitor) to notify a user.

4 is a flowchart illustrating an operation for providing various services using one DSRC base station 100 in a DSRC system.

In this case, it is assumed that the DSRC base station 100 is equipped with an ATIS channel card unit, an ATMS channel card unit, a CVO channel card unit, an APTS channel card unit, and an AVHS channel card unit.

Even in the case of FIG. 4, the overall operation flow is performed in the same process as in FIG. 3.

That is, the antenna router 120, which receives the signals transmitted from the ATIS terminal, the ATMS terminal, the CVO terminal, the APTS terminal, and the AVHS terminal from the DSRC base station 100 to one transmitting / receiving antenna 110, to each channel card unit. The DSRC dedicated network access unit 140 multiplexes the information transmitted from each channel card unit and transmits the multiplexed information to the DSRC server 300 through the DSRC dedicated network 200.

The DSRC server 300 analyzes and processes the information received from the DSRC base station 100 and transmits it to the DSRC router 400.

The DSRC rounder 400 receives information from the DSRC server 300 via the ATIS server 610, the ATMS server 620, the CVO server 630, the APTS server 640, and the AVHS via the Internet network 500. Each server transmits the information to the server 650 and collects and processes the received information and transmits the information to the DSRC server 300.

The DSRC server 300 checks the unique number (ID) of the DSRC base station 100 requesting the service information from the DSRC router 400 and then transmits the DSRC base station 100 to the DSRC base station 100 via the DSRC dedicated network 200. do.

The DSRC base station 100 analyzes the data sent from the DSRC dedicated network access unit 140 provided therein to demultiplex each service information and transmits the respective information to each channel card unit. For example, the ATIS service information is transmitted to the channel card unit 131 and the ATMS service information is transmitted to the channel card unit 132.

The information processed in each channel card unit is collected by the antenna router 120, multiplexed, and then transmitted through the antenna 110 for transmission and reception.

Accordingly, each terminal displays the corresponding information on the display device to inform the user.

As described in detail above, the present invention enables a channel card to be extended to use a multicarrier (carrier) frequency according to channel capacity, thereby providing various traffic related information to one DSRC base station, thereby reducing the base station installation cost. It can be effective.

Claims (4)

A DSRC base station for bidirectional communication with a plurality of DSRC terminals corresponding to each channel frequency by having a plurality of channel cards for accommodating respective channel frequencies allocated to each service type, and a plurality of DSRC terminals in the DSRC base station A DSRC server 300 which collects vehicle-related information or service request information received from the DSRC dedicated network and transmits the information corresponding to the service request to the DSRC base station while managing the collected information; A DSRC router for connecting the server to the Internet network, and a plurality of DSRC routers connected to the Internet network to provide traffic information, traffic management information, public transportation information, freight transportation information, and vehicle / road information, respectively. Service of a short-range wireless dedicated communication system characterized by comprising a service information providing server Providing device. 2. The DSRC base station according to claim 1, wherein the DSRC base station comprises: an antenna router for accommodating several channels with one transmitting and receiving antenna, and a DSRC dedicated network connection unit for multiplexing signals for transmission to a DSRC dedicated network and demultiplexing signals received from the DSRC dedicated network. And a complementary channel card unit configured to perform data transmission / reception between the antenna router and the DSRC dedicated network connection unit by using each channel frequency. 3. The channel controller of claim 2, wherein the plurality of channel card units respectively comprise a single carrier channel card for accommodating one high frequency carrier and a single carrier logic card for accommodating a MAC protocol of TDMA / TDD or TDMA / FDD for one carrier frequency. Device for providing a service of a short-range wireless dedicated communication system characterized in that it comprises a. The apparatus of claim 1, wherein each of the plurality of service information providing servers comprises an ATIS server, an ATMS server, an APTS server, a CVO server, and an AVHS server.