KR20150122344A

KR20150122344A - Multiband grid type railway communication system and its operating method

Info

Publication number: KR20150122344A
Application number: KR1020140048481A
Authority: KR
Inventors: 김주원
Original assignee: 한국철도공사
Priority date: 2014-04-23
Filing date: 2014-04-23
Publication date: 2015-11-02

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-band grid-based railway communication system and a method of operating the same, and more particularly, And a first wireless communication device and a second wireless communication device, wherein the first wireless communication device or the second wireless communication device transmits and receives wireless communication signals among a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters, Selecting a repeater having the highest communication signal strength, transmitting and receiving a wireless communication signal through the selected highest repeater, and transmitting the wireless communication signal except for the repeater where a communication failure occurs in the highest repeater during transmission / A plurality of terrestrial communication repeaters and a plurality of used communication repeaters Selecting the next repeater with the highest received radio signal strength, transmitting and receiving a wireless communication signal through the selected next highest repeater, and transmitting and receiving a radio communication signal through the next highest repeater, And transmitting and receiving a wireless communication signal by selecting another repeater having the highest wireless communication reception strength among the plurality of terrestrial communication repeaters and the plurality of using communication repeaters except for the repeater in which communication failure occurs when a communication failure occurs.

Description

[0001] MULTIBAND GRID TYPE RAILWAY COMMUNICATION SYSTEM AND ITS OPERATING METHOD [0002]

The present invention relates to a multi-band communication system capable of safely operating a railway vehicle using another radio communication when a failure occurs in any one of radio communication through radio relay through a railway dedicated relay, radio communication through a commercial communication relay, To a grid-type railway communication system and a method of operating the same.

As is well known, various methods and devices have been developed and introduced to ensure the safety of trains since the railway was operated in England in 1830. The communication between existing train controllers, engineers or engineers is analogue or digital radio Based wireless communication devices have already been implemented.

However, the existing wired communication-based railway signaling equipment has been rapidly transformed into wireless equipment in recent years due to mutual compatibility among the countries, economical and technical reasons.

In recent years, a railway control system based on wireless communication has been put into practical use by replacing a control system composed of wired lines between ground equipment and newly building a control share of terrestrial on-board devices from the function side. Can reduce the operation time compared with the conventional signal control system and can increase the transportation capacity and enable the data communication between the train and the central control system so that the efficiency of the train can be improved and the safety and convenience of the railroad can be optimized can do.

On the other hand, the railway communication system allocates a dedicated frequency for railway communication, installs a wireless communication repeater on the ground, installs a ground device on the railway, and then communicates with the central station through wireless communication to secure the running of the railway vehicle Checking the status.

However, since the dedicated frequency used in the railway communication system uses the band close to the commercial frequency and the military frequency, it is difficult to secure the frequency, and in a region such as a train station (for example, Seoul Station or Yongsan Station) It is difficult to process signals of all railway vehicles due to the limitation of the frequency capacity, but the waste of the frequency capacity is increasing in the trunk line.

In addition, in order to prevent collision of a traveling railway car, it relies on a signal command such as a start command and a stop command according to a 1: 1 wireless communication with a central control station, so that in a region where many railway vehicles are concentrated, It is difficult to ensure safe operation of the vehicle.

Patent Registration No. 10-0751057 (2007.08.23 Announcement): Automatic Train Control System Using Wireless Communication and Its Control Method

The present invention relates to a multi-band grid-type railway communication system, and more particularly, it relates to a multi-band grid-type railway communication system for connecting a radio communication through a relay station dedicated to a railway, a radio communication through a commercial communication repeater, To provide a multi-band grid-type railway communication system capable of safely operating a railway vehicle and a method of operating the same.

In addition, the present invention provides a multi-band grid method capable of safely operating a railway vehicle by communicating between railway vehicles and between a railway vehicle and a central station using wireless communication that can be used around a railway vehicle regardless of a communication method and frequency And a method of operating the same.

The present invention also relates to a system and method for determining mutual position and collision probability among railway vehicles through mutual communication between railway vehicles even if a wrong control command is transmitted through mutual communication between the railway vehicle and the central station using a multi-band grid- The present invention provides a multi-band grid-type railway communication system and a method of operating the railway communication system that can securely operate a railway vehicle by performing emergency measures such as stopping, decelerating, and avoiding a railway vehicle.

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description .

According to an embodiment of the present invention, there is provided a wireless communication system including a terrestrial communication repeater installed along a line for relaying a wireless communication signal between a first wireless communication apparatus and a second wireless communication apparatus, 2 wireless communication apparatus, wherein the first wireless communication apparatus is mounted on a central control station and is wirelessly connected through the terrestrial communication repeater and a commercial communication repeater, and the terrestrial communication A first wireless communication signal corresponding to the vehicle operation is transmitted to the second wireless communication device using a repeater having the highest wireless communication signal strength among the repeater and the commercial communication repeater, 2 wireless communication signals, wherein the second wireless communication apparatus is mounted on a plurality of railway cars, Wherein the first wireless communication device is wirelessly connected to the first wireless communication device through the terrestrial communication repeater and the commercial communication repeater and the second wireless communication device is connected to the first wireless communication device using the repeater having the highest wireless communication signal intensity among the terrestrial communication repeater and the commercial communication repeater, The second wireless communication device transmits the second wireless communication signal to the first wireless communication device while receiving the first wireless communication signal, and wirelessly communicates with the first wireless communication device through the commercial communication repeater when the terrestrial communication repeater fails to communicate And a multi-band grid-type railway communication system in which the terrestrial communication repeater and the commercial communication repeater are wirelessly communicated with another second radio communication apparatus in the event of a communication failure.

According to another embodiment of the present invention, there is provided a method of wireless communication, comprising the steps of: connecting wireless communication between a first wireless communication device and a second wireless communication device via a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters; The first wireless communication apparatus or the second wireless communication apparatus transmits a wireless communication signal between the plurality of terrestrial communication repeaters and the plurality of commercial communication repeaters, And transmitting the wireless communication signal through the selected one of the plurality of repeaters, and transmitting the wireless communication signal through the selected one of the plurality of repeaters except the repeater in which a communication failure occurs when the communication failure occurs in the highest repeater during transmission and reception of the wireless communication signal. The terrestrial communication repeater and the plurality of used communication repeaters, Selecting the next repeater having the highest reception strength of the first communication, transmitting and receiving the wireless communication signal through the selected next highest repeater, and transmitting and receiving the wireless communication signal through the next highest repeater, And transmitting and receiving the wireless communication signal by selecting another repeater having the highest wireless communication reception strength among the plurality of terrestrial communication repeaters and the plurality of using communication repeaters other than the repeater in which communication failure occurs when a communication failure occurs in the next higher repeater A method of operating a multi-band grid-based railway communication system can be provided.

According to another embodiment of the present invention, there is provided a method of wireless communication comprising: connecting wireless communication between a first wireless communication device and a second wireless communication device via a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters; Comprising the steps of: when a communication failure occurs in all repeaters including a plurality of commercial communication repeaters, connecting wireless communication with another second wireless communication apparatus through a wireless repeater provided in the second wireless communication apparatus; Transmitting and receiving a communication signal to and from the second radio communication apparatus and the second radio communication apparatus; and checking whether or not an adjacent railway vehicle exists by using the location information in the second radio communication apparatus or another second radio communication apparatus The second radio communication apparatus or the second radio communication apparatus, when the adjacent railway vehicle exists, Transmitting and receiving a radio communication signal for requesting collision information from a radio communication apparatus; checking whether there is a possibility of collision of the adjacent railway car using the collision information in the second radio communication apparatus or another second radio communication apparatus; The second radio communication apparatus or the second radio communication apparatus is operated normally when no collision possibility exists, and when there is a possibility of the collision, any one of the adjacent railway cars A method of operating the multi-band grid-type railway communication system including the step of forcibly stopping the multi-band grid system can be provided.

According to another embodiment of the present invention, there is provided a method of wireless communication comprising: connecting wireless communication between a first wireless communication device and a second wireless communication device via a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters; Connecting wireless communication with another second wireless communication device and another wireless communication device through a wireless repeater provided in the second wireless communication device when a communication failure occurs in all the repeaters including a plurality of commercial communication repeaters, Transmitting and receiving a wireless communication signal including positional information to and from the second wireless communication device, another second wireless communication device, and another second wireless communication device; and transmitting the wireless communication signal to the second wireless communication device, The second radio communication apparatus checks whether the adjacent railway vehicle exists by using the location information. Transmitting and receiving a wireless communication signal requesting collision information from the second wireless communication device, another second wireless communication device, or another second wireless communication device when the adjacent railway vehicle exists, Determining a priority of a vehicle operation using the collision information in a communication device, another second wireless communication device, or another second wireless communication device, and checking whether there is a possibility of collision of the adjacent railway vehicle; The method comprising the steps of: if there is no possibility of collision and if there is no adjacent railway vehicle, operating the railway cars normally; and if there is a possibility of the collision, the second radio communication device, another second radio communication device, The vehicle having the highest priority among the devices is normally operated and the remaining vehicles are forcibly stopped And a second wireless communication device for transmitting a wireless communication signal for the operation of the remaining vehicle according to the priority after passing the collision point by normally running the vehicle with the highest priority, To the other second wireless communication apparatus, and sequentially driving the remaining vehicles. The method of operating the multi-band grid-type railway communication system may be provided.

In the present invention, a multi-band grid-based railway communication system is constructed so that when a failure occurs in any one of radio communication through a railway dedicated repeater, radio communication through a commercial communication repeater, and radio communication between railway cars, It is possible to safely operate the railway vehicle.

Further, according to the present invention, the railway vehicle can be safely operated by intercommunication between the railway vehicles and between the railway vehicle and the central station using wireless communication available in the vicinity of the railway vehicle regardless of the communication method and frequency.

In addition, even if a wrong control command is transmitted through a mutual communication between a railway vehicle and a central control station by using a multi-band grid-based railway communication system, And emergency measures such as suspension, deceleration, and avoidance of the railway vehicle can be performed, thereby further ensuring safe operation of the railway vehicle.

Further, by constructing a multi-band grid-based railway communication system, it is possible to minimize the terrestrial and line communication devices, minimize the use of the communication frequency band for railway, The radio communication between the railway vehicles can be ensured by ensuring the bypass communication path even when the signal of the railway vehicle is cut off.

Especially, it is possible to minimize railway signaling communication base stations, which require a lot of installation and maintenance costs, so that railway lines can be constructed at low cost and railway vehicles can be operated. In accordance with various communication standards such as GSM, CDMA and LTE Inter-country and inter-regional compatibility can be improved through multiband commercial wireless communications that perform wireless communications.

1 is a schematic view of a multi-band grid-based railway communication system according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a central control station according to a first embodiment of the present invention;
3 is a block diagram of a railway vehicle according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a process of operating a multi-band grid-based railway communication system according to a second embodiment of the present invention.
FIG. 5 is a flowchart showing a process of operating a multi-band grid-based railway communication system according to a third embodiment of the present invention.
FIG. 6 is a flowchart illustrating a process of operating a multi-band grid-based railway communication system according to a fourth embodiment of the present invention.
7A to 7F are diagrams for explaining operation of a multi-band grid-based railway communication system according to an embodiment of the present invention;

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

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

FIG. 2 is a block diagram of a central control station according to a first embodiment of the present invention. FIG. 3 is a block diagram of a multi-band grid communication system according to a first embodiment of the present invention. Fig. 2 is a block diagram of a railway vehicle according to a first embodiment of the present invention; Fig.

1 to 3, a multi-band grid-based railway communication system according to an embodiment of the present invention includes a first wireless communication device 110, a terrestrial communication repeater 120, a second wireless communication device 130, A commercial communication repeater 140, and the like.

The first wireless communication device 110 is provided in the central control station and transmits various first wireless communication signals for vehicle driving commands such as start, stop, slow travel, line change, etc., And can receive a second wireless communication signal corresponding to various status reports.

Here, the first wireless communication device 110 is connected to the second wireless communication device 130 via the commercial communication repeater 140 while being wirelessly connected to the second wireless communication device 130 via the terrestrial communication repeater 120. [ And can receive the second wireless communication signal while transmitting the first wireless communication signal using the repeater having the highest wireless communication signal strength among the terrestrial communication repeater 120 and the commercial communication repeater 140 .

The first wireless communication apparatus 110 may include a modulator 111, a first encryptor 112, a first transceiver 113, a first decoder 114, a first controller 115, and the like .

The modulator 111 modulates the second wireless communication signal received through the first transceiver 113 under the control of the first controller 115 and transmits the modulated second wireless communication signal to the first transceiver 113 ). &Lt; / RTI >

The first encryptor 112 encrypts the first wireless communication signal corresponding to the vehicle operation command for the operation of the railway car in accordance with the first encryption code under the control of the first controller 115, 2 wireless communication device 130 to the first transceiver 113.

The first transceiver 113 is connected to the terrestrial communication repeater 120 and the commercial communication repeater 140 under the control of the first controller 115 while maintaining a wireless communication state with a predetermined period (for example, 3 minutes, 5 minutes And then transmits the first wireless communication signal transmitted through the first cipher 112 to the wireless communication apparatus 100 through the terrestrial communication repeater 120 and the commercial communication repeater 140, To a second wireless communication device 130 mounted on the railway car through a repeater having a signal strength.

The first transceiver 113 is connected to the modulator 111 through a repeater having the highest radio communication signal strength among the terrestrial communication repeater 120 and the commercial communication repeater 140 under the control of the first controller 115 And transmit the modulated second wireless communication signal to another multi-band grid-based railway communication system.

The first transceiver 113 transmits a second wireless communication signal through a repeater having the highest wireless communication signal intensity among the terrestrial communication repeater 120 and the commercial communication repeater 140 under the control of the first controller 115 And may transmit it to the first decoder 114.

The first decoder 114 decodes the second wireless communication signal according to the first decoding code corresponding to the second encryption code according to the control of the first controller 115 and provides the decoded second wireless communication signal to the first controller 115.

The first controller 115 controls the overall operation of the first wireless communication device 110 by controlling the modulator 111, the first encryptor 112, the first transceiver 113 and the first decoder 114, And generates a first wireless communication signal corresponding to a railway vehicle command signal (including a voice signal input by a controller through a microphone, of course) inputted by the controller for the operation of the railway vehicle, The first transceiver 113 and the first transceiver 113. The first transceiver 113 decrypts the second wireless communication signal through the first decoder 114 and outputs the decrypted second wireless communication signal to the first transceiver 113. [ Modulates the second wireless communication signal through the modulator 111, and transmits the modulated second wireless communication signal to the other multi-band grid-based railway communication system through the first transceiver 113. [

A plurality of terrestrial communication repeaters 120 are installed along the lines to relay radio communication signals between the first radio communication device 110 and the second radio communication device 130 in a railway dedicated frequency band, The first wireless communication device 110 repeats the wireless communication signal transmitted from the second wireless communication device 110 and transmits the relayed wireless communication signal to the second wireless communication device 130, Lt; / RTI >

The second radio communication device 130 is provided in each of a plurality of railway cars that run along the track and receives various radio communication signals for vehicle operation from the first radio communication device 110, And may transmit the wireless communication signal to the first wireless communication device 110.

The second wireless communication device 130 may also relay wireless communication between another second wireless communication device 130 'and another second wireless communication device 130 " When a communication failure occurs in the communication repeater 140, the second radio communication apparatus 130 'is wirelessly communicated with another second radio communication apparatus 130' to transmit / receive information on the dispatching operation to / from the adjacent railway vehicle, Can be performed.

The second wireless communication apparatus 130 includes a GPS receiver 131, a position calculator 132, a mileage recorder 133, a second encryptor 134, a second transceiver 135, a second decoder 136, a wireless repeater 137, a second controller 138, and the like.

The GPS receiver 131 generates and provides location information of the railway vehicle on which the second radio communication apparatus 130 is mounted using the GPS signal received from the GPS satellite under the control of the second controller 138, The controller 132 may calculate the current position of the railway vehicle on which the second wireless communication device 130 is mounted using the position information provided from the GPS receiver 131 under the control of the second controller 138. [

Here, the position information generated through the GPS receiver 131 and the current position calculated through the position calculator 132 may be provided to the second controller 138.

The odometer recorder 133 records the speed, acceleration, and travel distance of the railway vehicle, and provides the recorded speed, acceleration, and travel distance to the second controller 138.

The second encryption unit 134 encrypts the second wireless communication signal corresponding to various status reports of the railway car according to the second encryption code under the control of the second controller 138 to generate a first wireless communication signal To the second transceiver 135 for transmission to the device 110.

The second transceiver 135 is connected to the terrestrial communication repeater 120 and the commercial communication repeater 140 under a control of the second controller 138 while maintaining a wireless communication state, And then transmits the second wireless communication signal transmitted through the second encryption unit 134. The wireless communication signal strength of the second wireless communication signal transmitted from the terrestrial communication repeater 120 and the commercial communication repeater 140, To a first wireless communication device 110 mounted on a central station via a repeater having a signal strength.

The second transceiver 135 also receives the first wireless communication signal through the repeater having the highest wireless communication signal strength among the terrestrial communication repeater 120 and the commercial communication repeater 140 under the control of the second controller 138 And may transmit it to the second decoder 136.

The second decoder 136 decodes the first wireless communication signal according to a second decoding code corresponding to the first encryption code and provides the decoded first wireless communication signal to the second controller 138 under the control of the second controller 138.

The wireless repeater 137 includes a code division multiple access (CDMA) scheme, a global system for mobile communications (GSM) scheme, a long term evolution (LTE) scheme, a wireless fidelity scheme and a WiBro Relay the wireless communication with the other second wireless communication device 130 'by the wireless communication method, or relay the wireless communication between the second wireless communication device 130' and another second wireless communication device 130 " .

The second controller 138 includes a GPS receiver 131, a position estimator 132, a mileage recorder 133, a second encryptor 134, a second transceiver 135, a second decoder 136, And the wireless repeater 137 to control the overall operation of the second wireless communication device 130. The status reporting signal input by the engineer for reporting the status of the railway vehicle And transmits the second wireless communication signal through the second transceiver 135 after the second wireless communication signal is encrypted through the second encryption unit 134 and then transmitted through the second transceiver 135 It is possible to decode the received first wireless communication signal through the second decoder 136 and output the decoded signal.

The second controller 138 also controls the GPS receiver 131 to receive GPS signals from the satellites and the position calculator 132 to calculate the current position of the railway vehicle on which the second wireless communication device 130 is mounted. And to control the traveling distance recorder 133 to record the traveling distance of the railway vehicle on which the second radio communication device 130 is mounted.

Meanwhile, the second controller 138 controls the wireless repeater 137 in case of a communication failure in the terrestrial communication repeater 120 and the commercial communication repeater 140 to relay the wireless communication with the other second wireless communication device 130 ' Or relay the wireless communication between another second wireless communication device 130 'and another second wireless communication device 130 ".

The second controller 138 checks whether an adjacent railway vehicle exists by using the location information transmitted from the second radio communication device 130 'in a state where wireless communication with another second wireless communication device 130' is connected through the wireless repeater 137 And receives collision information including an entry line, a current position, a speed, an acceleration, and the like from another adjacent second radio communication apparatus 130 'when an adjacent railway vehicle exists, It is possible to control the railway vehicle on which the second radio communication apparatus 130 is mounted or another railway vehicle on which the second radio communication apparatus 130 'is mounted to be forcibly stopped.

Here, the second controller 138 receives position information or collision information from another second wireless communication device 130 ', but in the opposite case, the second controller 138 may perform the same process and control the same to be.

On the other hand, the second controller 138 controls the second controller 138 so that the wireless communication between the second wireless communication device 130 'and the second wireless communication device 130 " via the wireless repeater 137 is connected And determines whether there is an adjacent railway vehicle. If there is an adjacent railway vehicle, it determines the priority among the railway cars, and then determines the priority of the railway vehicle based on the input line, current position, speed, Receives collision information from another neighboring second wireless communication device 130 'and another second wireless communication device 130 ", and if there is a possibility of a collision via each of the received collision information, 130, another railway vehicle on which another second radio communication apparatus 130 'is mounted, and another railway vehicle on which another second radio communication apparatus 130' is mounted, box And to transmit a forced stop command signal through the wireless repeater 137 to forcibly stop the remaining vehicles at the same time.

Here, the second controller 138 receives location information or collision information from another second wireless communication device 130 'and another second wireless communication device 130 ", and the second wireless communication device 130 ' It is also possible to control the wireless communication device 130 in the second wireless communication device 130, the second wireless communication device 130 ', and the second wireless communication device 130 " As shown in FIG.

The commercial communication repeater 140 is provided with a plurality of commercial communication repeaters 140. The commercial communication repeaters 140 are installed in a commercial communication frequency band such as a code division multiple access (CDMA), a global system for mobile communications (GSM), a long term evolution (LTE) the first wireless communication apparatus 110 and the second wireless communication apparatus 130 and the second wireless communication apparatus 130 relay the wireless communication signals between the first wireless communication apparatus 110 and the second wireless communication apparatus 130 by the fidelity method and the WiBro (wireless broadband)

Accordingly, the present invention provides a multi-band grid-type railway communication system that can be used for a radio communication through a railway dedicated repeater, a wireless communication through a commercial communication repeater, and a wireless communication between railway cars, The railway vehicle can be operated safely.

Next, in a multi-band grid-based railway communication system having the above-described configuration, a first radio communication apparatus, a second radio communication apparatus, and a second radio communication apparatus, which maintain radio communication between the first radio communication apparatus and the second radio communication apparatus, An embodiment will be described.

FIG. 4 is a flowchart illustrating a process of operating a multi-band grid-based railway communication system according to a second embodiment of the present invention.

4, when a wireless communication connection is established between a first wireless communication device 110 and a second wireless communication device 130 via a plurality of terrestrial communication repeaters 120 and a plurality of commercial communication repeaters 140 (Step 402) and checks whether a wireless communication signal is transmitted or received between the first wireless communication device 110 and the second wireless communication device 130 (step 404).

7A, a plurality of terrestrial communication repeaters 120 and a plurality of commercial communication repeaters 140 may be used to connect a central station on which the first radio communication apparatus 110 is mounted and a second radio communication apparatus And a plurality of railway cars 130 mounted on the railway vehicle 130, respectively, to transmit and receive wireless communication signals.

As a result of the checking in step 404, when the wireless communication signal is transmitted or received, the first transceiver 113 of the first wireless communication apparatus 110 or the second transceiver 135 of the second wireless communication apparatus 130 The repeater 120 having the highest wireless communication signal strength among the plurality of terrestrial communication repeaters 120 and the plurality of the commercial communication repeaters 140 connected to the wireless communication can select and transmit the wireless communication signal (step 406). Here, it is a matter of course that the repeater having the highest radio communication strength selected by the first transceiver 113 and the repeater having the highest radio communication strength selected by the second transceiver 135 may be the same or different.

When a wireless communication signal is transmitted or received between the first wireless communication device 110 and the second wireless communication device 130 through a repeater having the highest wireless communication strength, It is checked whether a communication failure that can not be occurred occurs (step 408).

As a result of the check in step 408, when a communication failure occurs, the first transceiver 113 of the first radio communication apparatus 110 or the second transceiver 135 of the second radio communication apparatus 130 transmits the corresponding The first radio communication device 110 and the second radio communication device 130 may select the next repeater having the highest radio communication reception strength among the plurality of the terrestrial communication repeaters 120 and the plurality of the used communication repeaters 140 excluding the repeaters, (Step 410). &Lt; / RTI > Here, it is a matter of course that the next repeater having the highest radio communication strength selected by the first transceiver 113 and the next repeater having the highest radio communication strength selected by the second transceiver 135 may be the same or different .

Next, during transmission or reception of a wireless communication signal between the first wireless communication device 110 and the second wireless communication device 130 through the next repeater having the highest radio communication strength, the next relay transmits the wireless communication signal Or whether a communication failure that can not be received occurs (step 412).

As a result of the check in step 408, when a communication failure occurs, the first transceiver 113 of the first radio communication apparatus 110 or the second transceiver 135 of the second radio communication apparatus 130 transmits the corresponding The first wireless communication device 110 and the second wireless communication device 130 (hereinafter, referred to as " first wireless communication device ") select the other repeater having the highest wireless communication reception strength among the plurality of terrestrial communication repeaters 120 and the plurality of used communication repeaters 140 (Step 414). &Lt; / RTI > Here, the other repeater having the highest radio communication strength selected by the first transceiver 113 and the other repeater having the highest radio communication strength selected by the second transceiver 135 may be the same or different from each other .

For example, as shown in FIGS. 7B and 7C, when a communication failure occurs in a plurality of terrestrial communication repeaters 120, a plurality of commercial communication repeaters 140 are connected to a central control station And the second radio communication device 130, respectively, to transmit and receive wireless communication signals.

Next, in a multi-band grid-based railway communication system having the above-described configuration, when a wireless communication failure occurs between a first wireless communication device and a second wireless communication device through a grid connection, A third embodiment for performing safe driving will be described.

5 is a flowchart illustrating a process of operating a multi-band grid-based railway communication system according to a third embodiment of the present invention.

5, when a wireless communication connection is established between a first wireless communication device 110 and a second wireless communication device 130 via a plurality of terrestrial communication repeaters 120 and a plurality of commercial communication repeaters 140 (Step 502), and checks whether communication failure occurs in all the repeaters including the plurality of terrestrial communication repeaters 120 and the plurality of commercial communication repeaters 140 (step 504).

For example, as shown in Fig. 7 (d), wireless communication is connected between a plurality of railway cars each of which the second radio communication device 130 is mounted, so that the first radio communication device 110 and the second radio communication apparatus 130 can be connected to each other, the installation cost of the repeater can be reduced.

As a result of the check in step 504, if a communication failure occurs in all of the repeaters, the second wireless communication device 130 connects the second wireless communication device 130 to the other wireless communication device 130 through the wireless repeater 137, (Step 506) a wireless communication signal including location information with another second wireless communication device 130 '.

Then, the second controller 138 of the second radio communication apparatus 130 checks whether there is an adjacent railway car using the location information transmitted from the second radio communication apparatus 130 '(step 508).

As a result of the checking in step 508, if there is an adjacent railway vehicle, the second controller 138 of the second radio communication device 130 collides with another second radio communication device 130 'of the adjacent railway car May transmit a wireless communication signal requesting information and may receive conflict information transmitted from another second wireless communication device 130 '(step 510). Here, the collision information may include, for example, an entry line, a current position, a speed, an acceleration, and the like.

In the second controller 138 of the second wireless communication device 130, using the collision information transmitted from the second wireless communication device 130 ', the second controller 138 of the second wireless communication device 130' It is checked whether there is a possibility of collision with the railway vehicle (step 512).

If it is determined in step 512 that there is no possibility of collision with the adjacent railway vehicle, it is checked whether the second radio communication apparatus 130 ' The second controller 138 of the second radio communication device 130 operates the railroad car in which the second radio communication device 130 is mounted, in the case where there is a possibility of collision with the adjacent railroad car Or transmits a wireless communication signal for forced stop to another second wireless communication device 130 'to force the operation of the adjacent railway vehicle on which another second wireless communication device 130' having a possibility of collision is mounted (Step 514).

Thereafter, when one of the railway vehicles is forcibly stopped and another railway vehicle is normally operated and passes through a point where there is a possibility of collision, any one of the railway vehicles whose operation is forcibly stopped can be operated normally again.

For example, as shown in FIGS. 7E and 7F, when there is a possibility of collision between adjacent railway cars, the second radio communication device 130 ', which is different from the second radio communication device 130 mounted on the railway car, The adjacent railway vehicle on which the second radio communication apparatus 130 is mounted and the second radio communication apparatus 130 'other than the railway car on which the second radio communication apparatus 130 is mounted can be safely operated.

Accordingly, even if a wrong control command is transmitted through mutual communication between a railway vehicle and a central control station by using a multi-band grid-based railway communication system, And emergency measures such as suspension, deceleration, and avoidance of the railway vehicle can be performed, thereby further ensuring safe operation of the railway vehicle.

Next, in a multi-band grid-based railway communication system having the above-described configuration, when a wireless communication failure occurs between a first wireless communication device and a second wireless communication device through a grid connection, A fourth embodiment for performing the self-control will be described.

FIG. 6 is a flowchart illustrating a process of operating a multi-band grid-based railway communication system according to a fourth embodiment of the present invention.

6, when a wireless communication connection is established between a first wireless communication device 110 and a second wireless communication device 130 through a plurality of terrestrial communication repeaters 120 and a plurality of commercial communication repeaters 140 (Step 602), and checks whether all communication repeaters including a plurality of terrestrial communication repeaters 120 and a plurality of commercial communication repeaters 140 have a communication failure (step 604).

As a result of the check in step 604, when a communication failure occurs in all of the repeaters, the second wireless communication device 130 transmits the second wireless communication device 130 and the second wireless communication device 130 via the wireless repeater 137, The second wireless communication device 130 " and the second wireless communication device 130 " by wireless communication with the second wireless communication device 130 " 606).

The second controller 138 of the second wireless communication device 130 uses the position information transmitted from the other second wireless communication device 130 'and the second wireless communication device 130 " It is checked whether a railway vehicle exists (step 608).

As a result of the check in step 608, if there is an adjacent railway vehicle, the second controller 138 of the second radio communication device 130 may determine that the second radio communication device 130 ' Transmits a radio communication signal requesting collision information to another second radio communication apparatus 130 ", and transmits collision information transmitted from another second radio communication apparatus 130 'and another second radio communication apparatus 130 " (Step 610). Here, the collision information may include, for example, an entry line, a current position, a speed, an acceleration, and the like.

The second controller 138 of the second wireless communication apparatus 130 also uses the collision information transmitted from the other second wireless communication apparatus 130 'and the second wireless communication apparatus 130 " And checks whether there is a possibility of collision with each of the adjacent railway vehicles on which the other second radio communication apparatus 130 'and the second radio communication apparatus 130 " are mounted (step 612 ). Here, the priority order can be determined according to the order of arriving at the intersection, for example, using the current position, speed, acceleration, etc. of the railway car running on the entry railway, Of course, it is also possible to determine the priority of railway vehicles in various ways, such as railway restoration.

As a result of the check in step 612, when there is no possibility of collision with each of the adjacent railway vehicles on which the other second radio communication apparatus 130 'and the second radio communication apparatus 130 " are mounted, If the adjacent railway vehicle does not exist, the railway vehicle on which the second radio communication device 130 is mounted, another railway vehicle on which the other second radio communication device 130 'is mounted, The railway vehicle on which the second wireless communication device 130 " is mounted can normally run (step 614).

On the other hand, if it is determined in step 612 that there is a possibility of collision with each of the adjacent railway vehicles on which the second radio communication apparatus 130 'and the second radio communication apparatus 130 " The second controller 138 of the second wireless communication device 130 may control the second wireless communication device 130 'and the second wireless communication device 130 " By transmitting the wireless communication signal for the operation and the forced stop for the other vehicle to the other second wireless communication device 130 'and the second wireless communication device 130 " And can force the remaining vehicle to stop (step 616).

In the second controller 138 of the second wireless communication device 130, after the vehicle of the priority order is normally operated to pass the collision point (for example, intersection point), the second wireless communication device 130 ' To another second wireless communication device 130 ' and to another second wireless communication device 130 " in accordance with a priority order, By this transmission, the remaining vehicles can be sequentially operated (step 618).

For example, as shown in FIG. 7G, when there is a collision point (that is, an intersection) on the entry line and the direction of travel is different, wireless communication between the railway cars is determined to be prioritized, Can be safely operated sequentially.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be readily apparent that such substitutions, modifications, and alterations are possible.

110: first wireless communication device 111: first modulator
112: first encryptor 113: first transceiver
114: first decoder 115: first decoder
120: terrestrial communication repeater 130: second wireless communication device
131: GPS receiver 132: Position calculator
133: mileage recorder 134: second encryptor
135: second transceiver 136: second decoder
137: wireless repeater 138: second controller
140: Commercial communication repeater

Claims

A terrestrial communication repeater installed along the line for relaying wireless communication signals between the first wireless communication device and the second wireless communication device; and a terrestrial communication repeater installed on the line for relaying wireless communication signals between the first wireless communication device and the second wireless communication device And a commercial communication repeater for relaying,
The first wireless communication apparatus is installed in a central station and is wirelessly connected through the terrestrial communication repeater and a commercial communication repeater. The first wireless communication apparatus is connected to the terrestrial communication repeater and the commercial communication repeater through a repeater having the highest radio communication signal strength, Receiving a second wireless communication signal corresponding to a status report from the second wireless communication apparatus while transmitting a first wireless communication signal corresponding to the operation to the second wireless communication apparatus,
Wherein the second wireless communication apparatus is installed in each of a plurality of railway cars and is wirelessly communicated with the first wireless communication apparatus through the terrestrial communication repeater and the commercial communication repeater, Transmits the second wireless communication signal to the first wireless communication device while receiving the first wireless communication signal from the first wireless communication device using a repeater having the highest signal strength, Wherein the second communication unit is wirelessly connected to the first wireless communication apparatus through the commercial communication repeater and wirelessly communicated with another second wireless communication apparatus in the event of a communication failure of the terrestrial communication repeater and the commercial communication repeater
Multi - band grid - based railway communication system.

The method according to claim 1,
The first wireless communication apparatus includes:
A modulator for modulating the received second wireless communication signal for transmission to another multi-band grid-based railway communication system,
A first encryption unit for encrypting the first wireless communication signal according to a first encryption code,
Wherein the control unit checks the wireless communication signal strength according to a predetermined period while maintaining the wireless communication state through the terrestrial communication repeater and the commercial communication repeater, and transmits the first wireless communication signal encrypted through the first encryption unit A first transceiver for receiving the second wireless communication signal through the highest repeater,
A first decoder for decoding the second wireless communication signal received through the first transceiver according to a first decoding code,
Wherein the control unit controls the first wireless communication unit to generate and transmit the first wireless communication signal corresponding to the inputted railway vehicle operation command signal through the first transceiver after encrypting the first wireless communication signal through the first encryption unit, And transmits the modulated second wireless communication signal through the first transceiver to the other multi-band grid-based railway communication system through the first transceiver so as to decode the wireless communication signal through the first decoder and output it A first controller
And a multi-band grid-type railway communication system.

The method according to claim 1,
The second wireless communication apparatus comprising:
A second encryption unit for encrypting the second wireless communication signal according to a second encryption code,
Wherein the control unit checks the wireless communication signal strength according to a predetermined period while maintaining the wireless communication state through the terrestrial communication repeater and the commercial communication repeater, and transmits the second wireless communication signal encrypted through the second encryption unit A second transceiver for receiving the first wireless communication signal through the highest repeater,
A second decoder for decoding the first wireless communication signal received through the second transceiver according to a second decoding code,
A wireless repeater for relaying wireless communication with the other wireless communication device;
Wherein the control unit controls the second wireless communication signal to generate and transmit the second wireless communication signal corresponding to the inputted railway vehicle condition report signal through the second transceiver after the second wireless communication signal is encrypted through the second encryption unit, And a control unit configured to decode the wireless communication signal through the second decoder and to output the decoded wireless communication signal, relay the wireless communication with the other wireless communication apparatus through the wireless repeater to transmit / receive the dispatch information with the adjacent railway vehicle, A second controller for performing safe operation with the adjacent railway vehicle through the dispatched dispatch information,
And a multi-band grid-type railway communication system.

The method of claim 3,
The second wireless communication apparatus comprising:
A GPS receiver for generating and providing position information of the railway vehicle on which the second radio communication apparatus is mounted using a GPS signal received from a GPS satellite,
A position calculator for calculating and providing a current position of the railway vehicle using the position information provided from the GPS receiver,
A traveling distance recorder for recording and providing the traveling distance of the railway vehicle
Further comprising: a multi-band grid-based railway communication system.

5. The method according to any one of claims 1 to 4,
The commercial communication repeater, the second wireless communication device, and the other second wireless communication device each include a multi-band grid for relaying wireless communication in any one of CDMA, GSM, LTE, Wi-Fi, Railway communication system.

Connecting wireless communication between a first wireless communication device and a second wireless communication device through a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters,
Wherein the first wireless communication device and the second wireless communication device transmit and receive a wireless communication signal between the first wireless communication device and the second wireless communication device through the plurality of terrestrial communication repeaters and the plurality of commercial communication repeaters Selecting a repeater having the highest radio communication signal strength,
Transmitting and receiving the wireless communication signal through the selected highest repeater,
When a communication failure occurs in the highest repeater during transmission and reception of the wireless communication signal, the next repeater having the highest radio communication reception strength among the plurality of terrestrial communication repeaters and the plurality of used communication repeaters excluding the repeater in which communication failure occurs is selected Step,
Transmitting and receiving the wireless communication signal through the highest selected next repeater;
When a communication failure occurs in the highest next repeater during the transmission and reception of a wireless communication signal through the highest next repeater, the wireless communication reception strength of the plurality of terrestrial communication repeaters and the plurality of used communication repeaters, except for the repeater, Selecting the highest repeater and transmitting and receiving the wireless communication signal
A method of operating a multi-band grid-type railway communication system.

The method according to claim 6,
The plurality of commercial communication repeaters and the second radio communication apparatuses are connected to each other by a multi-band grid-type railway communication system that relays radio communication by any one of CDMA, GSM, LTE, Wi-Fi, How to operate.

Connecting wireless communication between a first wireless communication device and a second wireless communication device through a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters,
Connecting wireless communication with another second wireless communication apparatus through a wireless repeater provided in the second wireless communication apparatus when a communication failure occurs in all the repeaters including the plurality of terrestrial communication repeaters and the plurality of commercial communication repeaters,
Transmitting and receiving a wireless communication signal including the position information to and from the second wireless communication apparatus and another wireless communication apparatus;
Checking whether an adjacent railway vehicle exists by using the location information in the second radio communication device or another second radio communication device;
Transmitting and receiving a wireless communication signal requesting collision information from the second wireless communication device or another second wireless communication device when the adjacent railway vehicle exists,
Checking whether there is a possibility of collision of the adjacent railway vehicle using the collision information in the second radio communication device or another second radio communication device;
If there is no possibility of the collision, the second radio communication apparatus or the second radio communication apparatus normally operates the railway vehicle on which the second radio communication apparatus is mounted, and if there is a possibility of collision, any one of the adjacent railway cars is forcibly stopped step
A method of operating a multi-band grid-type railway communication system.

9. The method of claim 8,
Wherein the collision information includes an entry line, a current position, a speed, and an acceleration.

10. The method according to claim 8 or 9,
The plurality of commercial communication repeaters, the second wireless communication apparatuses, and the second wireless communication apparatuses may be a multi-function apparatus that relays wireless communication by any one of a CDMA system, a GSM system, an LTE system, a Wi- A method of operating a railway communication system using a band grid system.

Connecting wireless communication between a first wireless communication device and a second wireless communication device through a plurality of terrestrial communication repeaters and a plurality of commercial communication repeaters,
When a communication failure occurs in all of the repeaters including the plurality of terrestrial communication repeaters and the plurality of commercial communication repeaters, wireless communication with another second wireless communication device and another wireless communication device through a wireless repeater provided in the second wireless communication device ; And
Transmitting and receiving a wireless communication signal including the position information to and from the second wireless communication device, another second wireless communication device, and another second wireless communication device;
Checking whether an adjacent railway vehicle exists by using the location information in the second radio communication device, another second radio communication device, or another second radio communication device;
Transmitting and receiving a wireless communication signal for requesting collision information from the second wireless communication device, another second wireless communication device, or another second wireless communication device when the adjacent railway vehicle exists,
The second radio communication apparatus, the second radio communication apparatus or another second radio communication apparatus determines the priority of the vehicle operation using the collision information, and checks whether there is a possibility of collision of the adjacent railway vehicle Step,
If there is no possibility of collision and if there is no adjacent railway vehicle,
The second radio communication apparatus, and the second radio communication apparatus, if the possibility of the collision is high; and forcibly stopping the remaining vehicle,
A second wireless communication device, and a second wireless communication device; and a second wireless communication device for transmitting the wireless communication signal for operation of the remaining vehicle according to the priority, To the wireless communication device and sequentially driving the remaining vehicles
A method of operating a multi-band grid-type railway communication system.

12. The method of claim 11,
Wherein the collision information includes an entry line, a current position, a speed, and an acceleration.

13. The method according to claim 11 or 12,
The plurality of commercial communication repeaters, the second radio communication apparatus, the other second radio communication apparatus, and the other radio communication apparatus may be implemented by any one of a CDMA system, a GSM system, an LTE system, a Wi-Fi system and a WiBro system A method of operating a multi-band grid communication system for relaying wireless communication.