KR200318288Y1 - Combiner And Wireless Communication System Using It In An Underground Space - Google Patents

Abstract

The object of the present invention is to provide a wireless communication system in a combiner and an underground space to enable a dedicated communication between a subway engineer, a platform operator, and a central control center by using a radio broadcasting system already installed in a subway section. . To this end, the present invention provides a coupling device applied to a wireless communication system in an underground space, including: a leaky coaxial cable interface 14 for coupling with a leaky coaxial cable 60 installed in an underground space for the purpose of radio wave transmission and reception; An interface 11 for coupling with a subway station walkie-talkie 30, a repeater 20 for relaying radio broadcasts or mobile communications; A radio broadcast frequency filtering unit 12 for filtering the radio broadcast frequency transmitted through the interface 11 and transmitting the filtered radio broadcast frequency to the leaky coaxial cable 60; And a radio frequency filtering unit 19 for filtering the subway radio frequency to transmit the leakage coaxial cable interface 14 or the interface 11.

Description

Combiner And Wireless Communication System Using It In An Underground Space

The present invention relates to a wireless communication system, and more particularly, to a wireless communication system in an underground space such as a subway and a coupling device used in the wireless communication system.

Due to the development of wireless communication technology, communication using wireless communication has been widely used not only on the ground but also in buildings and underground spaces.

That is, a number of mobile communication repeaters are installed in underground spaces, such as subways, so that general users can make calls on the same conditions as on the ground even when using wireless terminals such as PCS and cellular phones.

However, all the communication systems inside the subway that are currently operating in five cities, including Seoul, Busan, Daegu, Gwangju, and Daejeon, are all designed as centralized through their command centers (Central Control Center).

1 is a communication system dedicated to one embodiment of a conventional subway section, subway radios (or platform station radios) as shown in the drawing is to be able to communicate with each other only through the central control center.

In other words, if the subway engineers want to communicate with each other through a dedicated communication system and a radio inside the subway rather than through a wireless communication terminal such as a PCS or a cellular phone, communication is possible only through the central control center as described above. Do.

Therefore, if there is an urgent situation in the underground space where the subway passes, if the dedicated communication system is paralyzed, there is no way to directly communicate with the front and rear subway trains passing through the accident area, which may lead to a large disaster. have.

In other words, although each subway car in Korea is equipped with a radio capable of voice communication with the command room, the communication equipment cannot directly talk to vehicles passing by the next section without passing through the command room. There is a problem that the driver of the subway in an emergency situation can cause accidents can not be directly contact the accident information of the neighboring subway.

On the other hand, as described above, there are two communication means available in the current subway section: general communication systems such as voice communication network (dedicated communication system) of the public corporation, PCS, and cellular phones.

In this case, the general mobile communication system is for a wireless communication service for general users, and its function is being expanded in accordance with the continuous call quality improvement demands of users, and it is also showing a stable function in terms of the system.

On the other hand, the dedicated communication system is installed so that subway operators and the central control center can perform the minimum voice communication through the radio in the subway section, and its function is insufficient due to the lack of continuous system supplementation and facility investment. There is a problem that it is inferior to the general mobile communication system.

Meanwhile, a leaky coaxial cable for relaying FM radio broadcasting is installed in an underground space including a subway section, and the leaky coaxial cable performs a function of an antenna while relaying radio waves.

However, since the leaky coaxial cable generally performs only a function of relaying FM radio broadcasting, it is necessary to develop an additional function thereof to find a more effective system operation method.

In addition, as the utilization of the underground space increases, the fire communication and police communication systems also need to expand their functions in order to cope with emergency situations occurring in each underground space as well as the subway section as described above. .

The present invention is due to the conventional problem solving and necessity as described above, using a radio broadcasting system already installed in the subway section to enable the dedicated communication between the subway engineer, platform station attendant and the central control center, combiner and underground Its purpose is to provide a wireless communication system in space.

In addition, the object of the present invention is to apply the above-mentioned coupler and the wireless communication system in the underground space to the wireless fire communication, police radio communication and general mobile communication.

1 is a communication system dedicated to one embodiment of a conventional subway section.

2 is a configuration diagram of an embodiment of a wireless communication system in an underground space according to the present invention.

Figure 3 is an embodiment configuration of a coupling device according to the present invention.

The present invention for achieving the above object, in the coupling device applied to the wireless communication system in the underground space, the leakage coaxial cable for coupling with the leaky coaxial cable 60 is installed in the underground space for the purpose of radio wave transmission and reception. Interface 14; Combined with at least one of a subway station radio (30), a fire station central control room radio (30), a police station central control room radio (30), a subway station office keyphone (80), a repeater for relaying radio broadcasting or mobile communication (20) An interface 11 for engaging with; A radio broadcast frequency filtering unit 12 for filtering the radio broadcast frequency transmitted through the interface 11 and transmitting the filtered radio broadcast frequency to the leaky coaxial cable 60; And filtering subway radio frequency to the leaky coaxial cable interface 14 or interface 11, or filtering fire station radio frequency to the leaky coaxial cable interface 14 or interface 11, or police station radio frequency. (Or mobile communication frequency) is filtered and transmitted to the leaky coaxial cable interface 14 or interface 11, or a train protection device frequency is filtered and transmitted to the leaky coaxial cable interface 14 or interface 11, It includes a radio frequency filtering unit 19 for performing at least one of the function of filtering the subway announcement broadcast frequency to the leakage coaxial cable interface 14 or the interface 11, the leakage coaxial cable 60 The radio wave is transmitted through the radio frequency filtering unit 19 to the underground space. The radios 40 and 50 in the underground space can receive the radio waves emitted by the radios 40 and 50 to be discharged back into the underground space or through the leaky coaxial cable interface 14. The radio frequency filtering unit 19 is characterized in that the transmission.

In addition, the present invention is a wireless communication system in the underground space, the leakage coaxial cable 60 is installed in the underground space for the purpose of radio wave transmission and reception; A repeater 20 for relaying radio broadcasting or mobile communication; A radio 30 for use by at least one of a subway station staff, a fire department central control room staff, or a police station central control room staff; The radio wave received from the leakage coaxial cable 60 is filtered and transmitted to the repeater 20 or the radio 30, while the radio wave transmitted from the repeater 20 or the radio 30 is transmitted to the leak coaxial cable. A coupling device 10 for transmission to 60; And walkie-talkie 40,50 for at least one of a station station employee, a subway engineer, a fire department employee, and a police station employee, for use in an underground space, wherein the leakage coaxial cable 60 is connected to the coupling device 10. The radio waves are transmitted to the underground space so that the radios 40 and 50 in the underground space can receive the radio waves, and the radio waves emitted by the radios 40 and 50 are received again and discharged back into the underground space. Characterized in that the transmission to the coupling device (10).

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

2 is a configuration diagram of an embodiment of a wireless communication system in an underground space according to the present invention, and particularly shows a wireless communication system in an underground space in which a subway operates, and FIG. 3 shows a coupling device 10 according to the present invention. As an embodiment of the configuration diagram, it shows the internal configuration of the coupling device 10 shown in FIG.

As shown in the figure, a wireless communication system in an underground space according to the present invention, a repeater 20 for relaying radio waves including radio broadcasting between an underground space and a communication system 70 in which the subway is operated, the repeater Leakage coaxial cable (60) installed in a subway moving section for use as a transmission and reception antenna for radio broadcasting and radio waves received through a radio transceiver for performing wireless communication using the leakage coaxial cable as a transmission / reception antenna Radio stations received from the radio station 30, the station station radio 50, the subway radio 40 and the repeater are filtered and transmitted to the leakage coaxial cable, while the station office radio and the station station radio (or subway radio) It comprises a coupling device 10 for filtering and relaying the transmission and reception frequency between the There.

At this time, the subway walkie-talkie 40 of the radio includes a train protection device will be described below. In addition, the key phone 80 shown in the drawing is a device for transmitting and receiving subway announcements, although not shown in the drawing through the guide broadcast through an output device such as a speaker connected to the coaxial cable 60 in the underground space. It is a device for transmitting and will be described below.

First, the leaky coaxial cable 60 used in the present invention will be described briefly.

In order to alleviate the traffic congestion caused by the increasing population, the development of underground spaces such as tunnels, subways, and underground shopping malls has been rapidly developed, and the number of people using them is increasing.

On the other hand, such underground spaces generally cannot receive radio broadcasts unless a special device is provided as a radio interference area. However, even in the radio interference areas as described above, services for receiving broadcasts, receiving pager signals for calling pagers, and transmitting and receiving radio telephones must be made smoothly. The transmission and reception of signals should be smooth.

In particular, in tunnel structures such as subways, the loss of radio waves is much greater than on the ground, so it is often impossible to use antennas. Therefore, in tunnel structures such as subways, leaky coaxial cables are used instead of antennas to cover areas that cannot be covered as antennas. Radio waves can make it go.

That is, the radio wave transmitted from the communication system 70 for providing radio broadcast is received through a repeater, and is transmitted through various slots of the leaky coaxial cable installed in the underground section for transmitting and receiving the leak signal. Can be delivered to a terminal such as a radio. In addition, the leakage coaxial cable 60 may also perform a function of receiving and transmitting radio waves through the slot.

On the other hand, the leaky coaxial cable 60 as described above is generally tied to the top of the ceiling or wall of the subway movement section and suspended, in the present design using the leaky coaxial cable platform station attendant radio 50 in the subway movement section In order to enable wireless communication between the subway walkie-talkie 40 and the station walkie-talkie 30.

In this case, the platform refers to a place where users can get on and off the subway, and the station office refers to a control room of each subway station or a central control center of all subway sections.

However, such leak coaxial cable 60 is currently installed using a frequency band (88 ~ 108MHz) for most FM radio broadcasting and the repeater 20 is also provided with devices that meet the same frequency band It is.

On the other hand, each of the radios 30, 40, and 50 used in the subway section generally uses a higher frequency (150-250 MHz) band than the radio frequency band, and its output value is relatively high.

Therefore, when the radio communication in the underground space to be described in the present invention using the leak coaxial cable 60, if the leak coaxial cable 60 is directly connected to the repeater 20, Since high power is applied to the repeater, the repeater may be damaged and there is a concern that it may interfere with radio broadcasting, which is a basic function of the repeater 20.

To this end, the present invention connects the coupling device 10 having the configuration as shown in FIG. 3 between the repeater 20 and the leaky coaxial cable 60 as shown in FIG. Connected to the coupling device 30 was to be used.

That is, the coupling device 10 applied to the present invention as shown in Figure 3, the leakage coaxial cable interface 14 for connecting to the leaky coaxial cable, the radio broadcast frequency transmitted from the repeater to filter the interface Radio broadcasting frequency filtering unit 12 for transmitting to the leakage coaxial cable through, the radio frequency transmitted from the leakage coaxial cable or the radio frequency transmitted from the station radio (30) by filtering the leakage coaxial cable and station radio And a subway radio frequency filter unit 13 for transmitting to 30, and an interface 11 for connecting the repeater and the station radio to the coupling device.

The radio broadcast frequency filtering unit 12 filters the radio broadcast frequency introduced into the coupling device 10 through the repeater 20 and the interface 11 as described above, and leaks the coaxial cable through the leaky coaxial cable interface 14. For transmitting to 60, a low band pass filter (LPF) is provided to pass only the FM radio broadcast band.

In addition, the subway radio frequency filtering unit 13 is to transmit the radio frequency of the radio transceiver of the subway walked into the coupling device 13 as described above to the leakage coaxial cable 60 and the station office radio, respectively, The bandpass filter (BPF) is configured to filter only the 150MHz band, which is a radio frequency band of the subway radio.

Meanwhile, the subway radio frequency filtering unit 13 is included in the radio frequency filtering unit 19, and is further included in the other filtering units 15, 16, 17, and 18 included in the radio frequency filtering unit 19. This will be described after the description related to the subway radio frequency filtering unit 13.

Hereinafter, in the wireless communication system according to the present invention shown in Figs. 2 and 3, it will be described the communication process between the station office walkie-talkie 30, the subway walkie-talkie 40, the station station walkie-talkie 50.

First, a subway driver will explain a process of talking with a station station walkie talkie 40, a station walkie talkie 30, and another subway walkie-talkie using the subway walkie-talkie 40.

When the subway driver performs the radio at the preset frequency through the subway walkie-talkie 40, the leakage coaxial cable 60 receives the radio wave and transmits it to the coupling device 10.

Radio waves transmitted to the coupling device 10 may be filtered by the subway radio frequency filtering unit 13 in the coupling device to perform communication with the station office transceiver 30.

At this time, the radio wave transmitted through the leaky coaxial cable 60 is transmitted to the coupling device 10 as described above, while being emitted through a number of slots in the connection portion of the leaky coaxial cable.

Accordingly, the station station attendant radio 50 or another subway walkie-talkie which is set in frequency with the subway walkie-talkie 40 may receive the radio wave and thus may communicate with the walkie-talkie 40 through the radio.

Next, the process of talking to the subway walkie-talkie 40, the station walkie-talkie 30 and another station station walkie-talkie using the station station attendant radio 50 will be omitted.

Next, the process of talking to the station station attendant radio 40 and the subway walkie talkie 40 using the station office walkie-talkie 30 will be described.

Radio waves transmitted through the station office transceiver 30 are transmitted to the leaky coaxial cable 60 through the subway radio frequency filtering unit 13 of the coupling device 10.

At this time, the transmitted radio waves are discharged through various slots in the connection portion of the leaky coaxial cable 60, and the radio waves emitted into the space are received through the station station attendant radio 50 and the subway radio 40. In addition, the communication between the station station walkie-talkie and the station station walkie-talkie 50 or the station walkie-talkie 30 and the subway walkie-talkie 40 becomes possible.

In addition, the radio waves transmitted from the station station attendant radio 50 and the subway radio 40 are transmitted to the station office radio 30 by the above-described method.

That is, when using the coupling device according to the present invention and the wireless communication system in the underground space as described above, the station walkie-talkie 30, the subway walkie-talkie 40, the station station attendant walkie-talkie 50, regardless of the place, Calls can be made in the same way as using a mobile communication terminal, and multi-party calls are possible, especially if the radio is set to the same frequency band.

Therefore, even if an emergency occurs in any space in the underground space, one-to-one and multi-party calls are possible.

Meanwhile, the present invention may be used for wireless communication between subway walkie-talkies 30, 40, and 50 in a subway section as described above, but is not limited thereto. It can also be applied to wireless communication. In addition, general mobile communication and subway announcements can also be implemented through the present invention.

Hereinafter, the wireless communication method mentioned above in addition to the wireless communication between the subway walkie-talkie will be briefly described.

First, even between the train protection device 40 mounted in each subway, if the train protection device radio frequency filtering unit 15 is provided as shown in FIG. 3, wireless communication through the leaky coaxial cable 60 is possible. . First, a brief description of the train protection device 40 is as follows.

That is, the train protection device 40 is a subway that is operating in an adjacent area when there is a fear of a chain accident caused by a derailment of a preceding vehicle or an interruption of an adjacent track in a section in which there are many adjacent trains such as double or double tracks of the subway. It is a device for promptly informing the protection situation by wireless communication, while receiving the above situation to automatically issue an alarm or stop the operation of the subway to prevent a chain accident. The train protection device 40 as described above is generally installed on the left side of the driving control station of the subway.

On the other hand, in the event of an accident while operating the subway in which the train protection device 40 is installed as described above, the subway engineer presses a situation occurrence switch installed in the front of the radio protection device 40 to provide an emergency signal. The transmission signal is transmitted to the leakage coaxial cable 60 through the antenna of the subway.

The emergency signal propagated through the leaky coaxial cable 60 is transmitted through the leaky coaxial cable 60 and received through an antenna of another train operating in an adjacent area, so that the train protection device 40 inside the other train is provided. Is sent to. The train protection device receiving the emergency signal automatically stops the operation of the subway or takes appropriate measures.

In addition, the emergency signal may be received by the coupling device 10, the train protection device radio frequency filtering unit 15 in the coupling device 10 by filtering the emergency signal to the train protection device 40 The emergency signal may be transmitted to the radio 30 of the department that manages the emergency.

In this case, the train protection apparatus radio frequency filtering unit 15 may use a band pass filter (BPF) of 160MHz band.

Next, we will explain how to communicate with the fire station staff using the wireless communication system according to the present invention in the underground space.

In other words, if the leaky coaxial cable 60 for radio broadcasting is installed in the underground space, between the fire station staff by installing the coupling device 10 according to the present invention between the repeater 20 and the leaky coaxial cable 60 Wireless communication via radio is possible.

At this time, the coupling device 10 should be provided with a fire fighting radio frequency filtering unit (band pass filter (BPF)) 16 that can filter the frequency band (450MHz) of the radio used by the fire department staff.

If the fire-frequency radio frequency filtering unit 15 as described above is provided in the coupling device 10, each fire station staff in the basement of their radio (same function as the station station attendant or the radio engineer's radio) (40, 50) In addition to wireless communication through, you can also talk to the radio (same function as the station radio) 30 in the central control room of the fire station.

Next, between the radios 40 and 50 of the police station staff and the radio 30 of the central control room of the police station, if the police (or mobile communication) radio frequency filtering unit 17 is provided as shown in FIG. Wireless communication via cable 60 is possible.

In this case, the police (or mobile communication) radio frequency filtering unit 17 is configured as a high band pass filter (HPF) to filter the frequency band (800MHz) of the police radio.

In addition, since the radio frequency of general mobile communication uses a higher band than the frequency band of the police radio, as described above, the police (or mobile communication) radio frequency filtering unit 16 is constituted by a high band pass filter. It can also perform the function of replacing the mobile communication network.

Lastly, as shown in FIG. 3, if an output device such as a speaker connected to the keyphone 80 and the leaky coaxial cable 60 is provided, subway announcements are possible. Guide broadcasting using the radio 40 is also possible.

That is, through the keyphone 80, the walkie-talkie 30 installed in the station room, the walkie-talkie (or keyphone) 40 installed in the subway can transmit the announcements associated with the passage of the subway, the announcement is a leaky coaxial cable (60) While propagating through), it may be broadcast through an output device such as a speaker connected to the leak coaxial cable (60).

At this time, the subway guide broadcasting radio frequency filtering unit 18 shown in FIG. 3 filters the guide broadcast transmitted from the keyphone 80 or the transceiver 30 installed in the station room, and transmits the leaked coaxial cable 60. Filters the guide broadcast transmitted from the radio (or key phone) 40 installed inside the subway to transmit the function to the key 80 or the radio 30, a 900MHz band pass filter (BPF) can be used have.

That is, according to what filter is used for the radio frequency filtering unit 19 as shown in FIG. 3, the present invention can be used for various purposes in the underground space.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention defined in the appended claims.

The present invention as described above has an excellent effect to enable the early response to emergency situations by enabling smooth communication between the subway engineer, platform station staff, station staff when an emergency occurs in an underground space such as subway.

In addition, the present invention uses a radio, and if the frequency band is set to be used by all users irrespective of the number of radios, it is an excellent effect to actively respond to a number of emergency situations that can occur in underground spaces such as subway There is.

In addition, the present invention has an excellent effect that can be used by employees of the fire station and police station as well as subway staff depending on how to configure the filtering unit of the coupling device.

In addition, the present invention has an excellent effect that it is possible to replace the general mobile communication network by providing a high pass filter (HPF) in the coupling device.

Claims (4)

In the coupling device applied to a wireless communication system in the underground space, A leaky coaxial cable interface 14 for coupling with a leaky coaxial cable 60 installed in an underground space for the purpose of radio wave transmission and reception; Combined with at least one of a subway station radio (30), a fire station central control room radio (30), a police station central control room radio (30), a subway station office keyphone (80), a repeater for relaying radio broadcasting or mobile communication (20) An interface 11 for coupling with; A radio broadcast frequency filtering unit 12 for filtering the radio broadcast frequency transmitted through the interface 11 and transmitting the filtered radio broadcast frequency to the leaky coaxial cable 60; And Filter the subway radio frequency to transmit the leakage coaxial cable interface 14 or interface 11, or filter the fire station radio frequency to transmit the leakage coaxial cable interface 14 or interface 11, or police station radio frequency ( Or a mobile communication frequency) to be transmitted to the leaky coaxial cable interface 14 or the interface 11, or to the leaky coaxial cable interface 14 or the interface 11 by filtering the train protection equipment frequency, or subway It includes a radio frequency filtering unit 19 for performing at least one of the function of filtering the announcement broadcast frequency to the leakage coaxial cable interface 14 or the interface 11, The leakage coaxial cable 60 emits radio waves transmitted through the radio frequency filtering unit 19 to the underground space so that the radios 40 and 50 in the underground space can receive the radio 40. Receiving the radio wave emitted by the 50 and re-emitting it to the underground space or transmitting the radio wave to the radio frequency filtering unit 19 through the leaky coaxial cable interface 14. Combined device characterized in that. The method of claim 1, The leakage coaxial cable (60), the coupling device, characterized in that for transmitting the subway announcement broadcast transmitted from the radio frequency filtering unit (19) or the radio (40) inside the subway to a speaker. In a wireless communication system in the underground space, Leakage coaxial cable 60 is installed in the underground space for the purpose of radio wave transmission and reception; A repeater 20 for relaying radio broadcasting or mobile communication; A radio 30 for use by at least one of a subway station staff, a fire department central control room staff, or a police station central control room staff; The radio wave received from the leakage coaxial cable 60 is filtered and transmitted to the repeater 20 or the radio 30, while the radio wave transmitted from the repeater 20 or the radio 30 is transmitted to the leak coaxial cable. A coupling device 10 for transmission to 60; And At least one of the station station personnel, the subway engineer, the fire station staff, and the police station staff includes radios (40, 50) for use in underground spaces, The leakage coaxial cable 60 emits radio waves transmitted through the coupling device 10 to the underground space so that the radios 40 and 50 in the underground space can receive the radio 40 and 50. Receiving the radio wave emitted by) and emitting it back to the underground space or transmitting to the coupling device 10 Wireless communication system in the underground space, characterized in that. The method of claim 3, wherein The coupling device, A leaky coaxial cable interface 14 for coupling with the leaky coaxial cable 60; An interface (11) for coupling with the transceiver (30) and the repeater (20); A radio broadcast frequency filtering unit 12 for filtering the radio broadcast frequency transmitted through the interface 11 and transmitting the filtered radio broadcast frequency to the leaky coaxial cable 60; And Filter the subway radio frequency to transmit the leakage coaxial cable interface 14 or interface 11, or filter the fire station radio frequency to transmit the leakage coaxial cable interface 14 or interface 11, or police station radio frequency ( Or a mobile communication frequency) to be transmitted to the leaky coaxial cable interface 14 or the interface 11, or to the leaky coaxial cable interface 14 or the interface 11 by filtering the train protection equipment frequency, or subway Radio frequency filtering unit 19 for performing at least one of the function of filtering the broadcast broadcast frequency to the leakage coaxial cable interface 14 or the interface 11 Wireless communication system in the underground space comprising a.