KR102047543B1 - Auxiliary radio communication system based on optical cable - Google Patents

Abstract

The present invention relates to an optical cable-based wireless communication auxiliary system, the wireless communication auxiliary system includes at least a fire radio signal and a disaster broadcast signal, a wireless communication signal that may further include a TETRA signal, PS-LTE signal Wireless communication module for transmitting and receiving and relaying the signals, and converts the electrical signal corresponding to the wireless communication signals into a wavelength division multiplexed optical signal, and converts the wavelength division multiplexed optical signal received through the optical cable into an electrical signal Master equipment (MU) having an optical module for transmitting to the wireless communication module; A plurality of remote devices (RUs) installed in an underground or high-rise building where radio waves cannot be smoothly received and transmitting and receiving a wavelength division multiplexed optical signal; And generating a plurality of wavelength division multiplexed optical signals output from the master device to each of the remote devices through optical cables, and combining the wavelength division multiplexed optical signals received from each remote device and transmitting them through the optical cable. And an optical coupler, and each of the remote devices receives a wavelength division multiplexed signal from the optical coupler, converts the signal into a wireless communication signal capable of communicating with the wireless communication devices, and outputs a wireless communication signal from the wireless communication devices. It receives the signal, converts it into an electrical signal, generates a wavelength-division multiplexed signal, and transmits it to the optical coupler through an optical cable.

Description

Auxiliary radio communication system based on optical cable

The present invention relates to a wireless communication auxiliary equipment, and more particularly, to an optical cable-based wireless communication auxiliary equipment system.

In order to support firefighters' smooth communication in the event of a fire, buildings above a certain size must be equipped with wireless communication auxiliary facilities in underground sections and in accordance with the Fire Safety Standards (NFSC 505). Radio communication aids are fire-extinguishing facilities required for fire brigade to enter the building and to communicate with fire brigades or disaster prevention centers or officials during fire and rescue operations. In the case of the basement, unlike the ground floor, due to the underground structure, radio waves are not reached smoothly, so communication between them is not easy. In the event of a fire through radio communication aids, the fire brigade can enter underground structures or buildings for stable communication.

Figure 1 shows an example of the configuration of a general wireless communication auxiliary equipment, using a leaky coaxial cable. Manually connected to the ground connection terminal box 100 on the ground to communicate with the radio communication device of the firefighter in the basement. In order to communicate with the underground wireless communication device between the ground connection terminal box 100 and the distributor 120, the distributor 120 and the connector (connector, 130) is connected by a coaxial cable 110, respectively, the connector (connector, 130) And the terminating resistor 160 are connected by a leaky coaxial cable 150. The base station wireless communication device 140 communicates with a communication device manually connected to the ground connection terminal box 100 through the leakage coaxial cable 150.

The leakage coaxial cable type wireless communication auxiliary equipment is not high in efficiency and poor in on-site usability due to manual connection. In addition, as shown in FIG. 2, the leakage coaxial cable has a large loss in the high frequency region, and thus the call quality of each section is different depending on the distance between the connector and the terminating resistor. Referring to FIG. 2, the leaky coaxial cable has a good reception quality in a section A close to the ground connection terminal box and a good reception, but a section C in a long distance is poor in reception and poor in call quality. Also, interlayer communication is not good. Therefore, referring to FIG. 2, firefighters in the basement 2 floor have a high accident rate due to inter-floor communication problems during the suppression process.

Therefore, coaxial cable-based wireless communication auxiliary equipment fluctuates communication quality such as communication sound quality and bit error rate due to signal loss according to the distance of leakage coaxial cable itself.

On the other hand, the national response and the public's interest in disaster and disaster situation are increasing all over the world recently. In order to secure safety from disaster disasters and minimize damage during disasters, the establishment and standardization of an efficient disaster safety wireless communication network is essential. Major overseas countries and Korea are making great efforts to establish disaster safety communication network using next generation wireless communication technology.

The existing disaster safety communication network was established through TETRA (Terrestrial Trunked Radio), which uses the Trunked Radio System (TRS) network for emergency communication, mainly in Europe, and APCO-P25, in the United States. However, in recent years, the size of the disaster situation is increasing, and the demand for wireless communication capable of data communication such as video in addition to voice communication is increasing for various organizations to cope with the three-dimensional response. In particular, as the U.S. aggressively pushed ahead with the LTE (Long Term Evolution) -based disaster safety communication network construction plan, there is a growing interest in establishing a disaster safety communication network that accepts multimedia worldwide. As a representative technology for implementing this, communication network construction using LTE, especially PS (Public Safety) -LTE technology, has become a big direction for the construction of a disaster-based communication network based on multimedia in the future. In November 2012, the Federal Communications Commission (FCC) issued a license for the 700 MHz band frequency 20 MHz (758-768 MHz, 788-798 MHz) to build an LTE-based public safety net.

However, in domestic disaster safety wireless networks, disaster response organizations have difficulty in communicating with each other because of different communication methods with frequency bands such as VHF, UHF, and TRS, and it is difficult to respond quickly and systematically. For example, firefighters use different radios in the field for each VHF, UHF, and TRS, and the confusion of these communication channels is causing inconvenience to firefighters and disaster suppressors on site.

In addition, since many public institutions are using the 2.8MHz bandwidth allocated for VHF / UHF radios, it is difficult to secure enough channels. In addition, after the implementation of the integrated command wireless communication network construction project, investment in the communication network has been suspended, and equipment and systems are aging, and the replacement time is coming.

In addition, for disaster broadcasting, it is mandatory to simultaneously install "FM Radio Broadcasting" and "T-DMB Broadcasting" receiving facilities for the visually impaired and the hearing impaired on the basement floor of the building by using the broadcasting joint reception facility. Even within the households, the broadcasting signal output terminal of the serial terminal should be installed to output television broadcasting, FM radio broadcasting, mobile multimedia broadcasting, and satellite broadcasting signals. You should be able to connect.

In addition, the government decided to build a Public Safety (LTE) using the 700MHz frequency band (20MHz bandwidth) as a national disaster safety network technology. An integrated linkage plan with other communication networks, such as the railway network and the e-Navigation network, and a linkage plan with existing networks (TETRA, iDEN, UHF, VHF, etc.) are needed. In addition, various mobile base station construction plans for emergency communication should be prepared in case of shadow area and communication network destruction.

Registered Patent Publication No. 10-0807820 (2008.02.20)

The problem to be solved by the present invention is to solve the problems of high cost and communication inefficiency of the coaxial cable-type radio communication auxiliary equipment described above, and emergency communication as well as emergency broadcasting such as fire radio and FM radio and terrestrial DMB broadcasting. It is to provide an optical cable-based wireless communication auxiliary facility system that can accommodate the TETRA signal using the TRS (Trunked Radio System) network and the PS-LTE signal selected by the national disaster safety network technology method.

The optical cable-based wireless communication auxiliary equipment system according to the present invention for achieving the above technical problem, including at least UHF band fire radio signal, and FM and terrestrial DMB band disaster broadcast signal, TRS (Trunked Radio for emergency communication And a wireless communication module for transmitting and receiving wireless communication signals of different frequency bands, which may further include a TETRA signal using a network and a PS (Public Safety) -LTE signal used in a broadband public safety communication network. Converts an electrical signal corresponding to the wireless communication signals output from the communication module into a wavelength division multiplexed (WDM) optical signal and outputs the wavelength division multiplexed optical signal received through an optical cable to correspond to the wireless communication signal. Master equipment (MU) having an optical module for converting the signal to the wireless communication module; A plurality of remote devices (RUs) installed in an underground or high-rise building where radio waves cannot be reached, and transmitting and receiving the wavelength division multiplexed optical signal; And generating the wavelength division multiplexed optical signal output from the master device by the number of the plurality of remote devices, wherein the plurality of remote devices are located between the master device MU and the plurality of remote devices RUs. And an optical coupler for transmitting to each of the devices and combining the wavelength division multiplexed optical signals received from each of the plurality of remote devices, and transmitting the multiplexed optical signals to the master device through an optical cable. Receives the multiplexed signal and converts it into a wireless communication signal that can communicate with the wireless communication devices in the basement or high-rise building, and receives the wireless communication signal from the wireless communication devices to convert into an electrical signal wavelength division It is generated as a multiplexed signal and transmitted to the optical coupler through an optical cable.

The optical cable-based wireless communication auxiliary equipment system according to the present invention for achieving the above technical problem, including at least UHF band fire radio signal, and FM and terrestrial DMB band disaster broadcast signal, TRS (Trunked Radio for emergency communication And a wireless communication module for transmitting and receiving wireless communication signals of different frequency bands, which may further include a TETRA signal using a network and a PS (Public Safety) -LTE signal used in a broadband public safety communication network. Converts an electrical signal corresponding to the wireless communication signals output from the communication module into a wavelength division multiplexed optical signal and converts the wavelength division multiplexed optical signal received through an optical cable into an electrical signal corresponding to the wireless communication signal. Master equipment (MU) having an optical module for converting and transmitting to the wireless communication module; A first remote device (RU) installed in a basement or a high-rise building in which radio waves cannot be smoothly received and connected to the master device by an optical cable and transmitting and receiving the wavelength division multiplexed optical signal; And a second remote device (RU) installed in a basement or a high-rise building in which radio waves cannot be reached, and connected to the first remote device by an optical cable and transmitting and receiving the wavelength division multiplexed optical signal. The remote device and the second remote device receive the wavelength division multiplexed signal through the optical cable, convert the signal into a wireless communication signal capable of communicating with wireless communication devices in the basement or high-rise building, and output the wireless communication signal. Receives a wireless communication signal from the devices to generate a wavelength division multiplexed signal.

The wireless communication module includes an antenna for transmitting and receiving the wireless communication signals; A fire fighting wireless unit which transmits and receives a UHF band fire fighting radio signal through the antenna and has a switching unit which switches transmission and reception of fire fighting radio signals between the antenna and the optical module; And a disaster broadcasting unit configured to receive FM and terrestrial terrestrial digital multimedia broadcasting (DMB) broadcast signals through the antenna and transmit them to the optical module, and a TRS (Trunked Radio System) network for emergency communication between the antenna and the remote device. Tetra portion for transmitting and receiving a TETRA signal using; And a PSLTE unit for transmitting and receiving a PS (Public Safety) -LTE signal used in a broadband public safety communication network between the antenna and the remote device.

The master device (MU) monitors system paths in real time through automatic gain control, system real-time control through a graphical user interface, and is switched from downlink to uplink among a plurality of remote devices. It further includes a control unit for providing information on the remote equipment, and performs the self-diagnosis.

According to the optical cable-based wireless communication auxiliary system according to the present invention, in order to ensure smooth communication in suppression activities in the event of a disaster, an optical cable and an optical cable-based relay module are provided instead of a coaxial cable and a splitter method having little propagation loss. This can solve signal loss problems and significantly improve call quality. In addition, it is possible to increase the efficiency of inter-floor communication in underground and high-rise buildings with more than 16 floors. In other words, by replacing the coaxial cable with an optical cable, it is possible to secure stable relay performance by reducing transmission attenuation and reduce RF coupling loss, thereby improving inter-layer communication performance.

And according to the present invention, it is possible to provide a complex relay function for PS-LTE wireless communication selected as a national disaster safety communication, as well as fire, disaster broadcasting (FM and terrestrial DMB) and TETRA, not 450MHz single mode.

In addition, ease of use can be greatly improved by eliminating inconvenience caused by manual connection of the wireless connection terminal box installed according to the fire safety standard and providing automatic connection.

In addition, digital control of the master equipment (MU) improves call quality and inter-floor communication within the in-building, while digital active control ensures communication stability between firefighters within the in-building.

In addition, product cost can be significantly reduced compared to existing coaxial cable-based systems, which can lead to price competitiveness.

1 illustrates an example of a configuration of a leaky coaxial cable-based wireless communication auxiliary facility as an example of a general wireless communication auxiliary facility.
2 is a view for explaining the problem of the leakage coaxial cable-based wireless communication auxiliary equipment.
3 is a block diagram showing an embodiment of the configuration of an optical cable-based wireless communication auxiliary system according to the present invention.
Figure 4 is a block diagram showing another embodiment of the configuration of the optical cable-based wireless communication auxiliary system according to the present invention.
5 is a block diagram showing an example of the configuration of a master unit (Master Unit) of the optical cable-based wireless communication auxiliary system according to the present invention.
Figure 6 shows an example of a more detailed configuration for the fire fighting wireless unit of the master unit (Master Unit) constituting the optical cable based wireless communication auxiliary system according to the present invention.
7 is a block diagram illustrating an example of an optical module configuration of a master unit according to the present invention.
FIG. 8 shows an example of a configuration in which an optical module of the master equipment shown in FIG. 7 serves 32 remote units using an optical coupler.
9 is a block diagram showing an example of the configuration of the master unit (Master Unit) of the optical cable-based wireless communication auxiliary system according to the present invention.
10 is a block diagram illustrating an example of a configuration of a remote unit (RU) constituting an optical cable based wireless communication auxiliary facility system according to the present invention.
11 illustrates an example of mounting a PS-LTE module instead of a TETRA module as an example of a configuration of a remote unit (RU) according to the present invention.
12 shows the internal shape of a remote unit (RU) constituting an optical cable based wireless communication auxiliary system according to the present invention.
Figure 13 shows an example of the structure and appearance of the optical cable-based wireless communication auxiliary system according to the present invention.
FIG. 14 illustrates a system path real-time monitoring and alarm system diagram through automatic gain control in an optical cable based wireless communication auxiliary system according to the present invention.
15 is a diagram illustrating a wireless communication service applying the optical cable-based wireless communication auxiliary system according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Configurations shown in the embodiments and drawings described herein are only one preferred embodiment of the present invention, and do not represent all of the technical spirit of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

Figure 3 is a block diagram showing an embodiment of the configuration of the optical cable-based wireless communication auxiliary system according to the present invention, the master unit (MU (Master Unit), 300), remote equipment (RU, 310, 320, 330 , 340 and an optocoupler 305.

The master unit (MU) 300 transmits / receives and relays wireless communication signals of different frequency bands, converts an electric signal corresponding to the wireless communication signals into a wavelength division multiplexed (WDM) optical signal, and outputs the same. The wavelength division multiplexed optical signal received through the optical cable 390 is converted into an electrical signal corresponding to the wireless communication signal and relayed. The radio communication signals of different frequency bands include at least a UHF band fire radio signal, a FM and terrestrial DMB band disaster broadcast signal, and a TETRA signal using a TRS (Trunked Radio System) network for emergency communication; The PS may further include a Public Safety (LTE) signal used in a broadband public safety network. For reference, FM radio broadcasting uses signals in the 88 ㎒ to 108 ㎒ band, and is a circularly polarized wave broadcasting signal, which is used to install FM radio broadcast reception antennas horizontally or vertically to maintain normal reception quality while maintaining normal reception quality. The antenna direction is fixed at the point where the level deviation is minimum. Mobile multimedia broadcasting (T-DMB) uses signals in the 174MHz to 216MHz band, and is a vertically polarized broadcast. In general, mobile multimedia broadcasting (T-DMB) is installed vertically with a Yagi antenna of the VHF HIGH band corresponding to a broadcasting channel of a corresponding region. TETRrestrial Trunked Radio (TETRA) is a mobile wireless communications standard developed by the European Telecommunications Standards Institute for public safety communications. It can transmit voice and data at high speed.

Many countries around the world are using TRS (Trunked Radio System) networks that are suitable for mission critical communications instead of using common commercial cellular networks for public safety and disaster management. TETRA (TErrestrial Trunked Radio) is a TRS-specific standard of the European Telecommunication Standard Institute (ETSI), widely used in Europe, Africa, the Middle East, Asia, and Latin America, and adopted as a TTA standard in Korea. It is used.

Remote equipment (RU, 310, 320, 330, 340) is installed in the basement or high-rise building is not easy to reach the radio wave, and transmits and receives the optical coupler 305 and the wavelength division multiplexed optical signal. When the remote device (RU, 310, 320, 330, 340) receives the wavelength division multiplexed signal from the optical coupler 305, the wireless communication devices 350, 360, 370 is converted into a wireless communication signal that can communicate with the output. In addition, the remote equipment (RU, 310, 320, 330, 340) when receiving a wireless communication signal from the wireless communication devices (350, 360, 370) in the basement or high-rise building converted into an electrical signal wavelength division multiplexed signal Is generated and transmitted to the optical coupler 305 through the optical cable 390.

The optocoupler 305 is located between the master device (MU, 300) and the plurality of remote devices (RUs, 310, 320, 330, 340) and receives the wavelength division multiplexed optical signal output from the master device (300). The number of remote devices connected to the optical cable 390 is generated and transmitted to each of the plurality of remote devices RUs 310, 320, 330, and 340 through the optical cable 390. In addition, when the optical coupler 305 receives wavelength division multiplexed optical signals from each of the plurality of remote devices (RUs, 310, 320, 330, and 340), the optical coupler 305 combines the received wavelength division multiplexed optical signals to form an optical cable 390. Pass through to the master equipment (300).

5 is a block diagram showing an example of the configuration of a master unit (Master Unit, 300) of the optical cable based wireless communication auxiliary system according to the present invention. Referring to FIG. 5, the master equipment 300 according to the present invention includes a wireless communication module 500, an optical module 550, and a controller 590.

The wireless communication module 500 includes an antenna 510, a fire fighting wireless unit 515, a disaster broadcasting unit 520, a MUX filter 535, and a distributor 540, and includes a tetra unit 525 and a PSLTE unit ( At least one of the 530 may be further provided.

 The antenna 510 is a different frequency band including at least one of a fire radio signal in the UHF band, a disaster broadcasting signal in the FM and terrestrial DMB bands, a TETRA signal and a PS-LTE signal for mediating communication between the radio communication auxiliary facility and the base station. Transmit and receive wireless communication signals having a.

The fire fighting wireless unit 515 detects and relays the UHF band radio fire fighting radio signal from the signal received through the antenna 510, and transmits the UHF band radio fire fighting radio signal to the antenna 510. 6 shows an example of a more detailed configuration of the fire fighting wireless unit (515, 600), and includes a switching unit 620. Since the fire radio signal is transmitted and received separately in the 450MHz band, the switching unit 620 switches the transmission and reception of the fire radio signal between the master device 300 and the remote devices (RUs, 310, 320, 330, 340). . Specifically, the transmission and reception of the fire fighting radio signal between the antenna 510 and the optical module 550 is switched.

The disaster broadcasting unit 520 detects FM and terrestrial terrestrial digital multimedia broadcasting (DMB) broadcasting signals from signals received through an antenna 510 from an external base station and relays them to remote devices (RUs, 310, 320, 330, 340). .

The tetra unit 525 detects, transmits, and relays a TETRA signal using a Trunked Radio System (TRS) network for emergency communication between the antenna 510 and remote devices (RUs, 310, 320, 330, 340).

The PSLTE unit 530 transmits and receives and transmits a Public Safety (LTE) -LTE signal used in a broadband public safety communication network between the antenna 510 and the remote devices (RUs, 310, 320, 330, and 340).

The MUX filter 535 multiplexes signals output from the wireless fire fighting unit 515, the disaster broadcasting unit 520, the tetra unit 525, and the PSLTE unit 530 to generate a single signal and transmits the signal to the optical module 550. do.

The distributor 540 receives the multiplexed electrical signals from the optical module 550 and transmits the multiplexed electrical signals to the wireless fire fighting unit 515, the tetra unit 525, and the PSLTE unit 530, respectively.

The optical module 550 transmits an electrical signal output from at least one of the fire fighting wireless unit 515, the disaster broadcasting unit 520, the tetra unit 525, and the PSLTE unit 530 through the laser diodes LD and 560. Converted to and transmitted to the remote equipment (RUs, 310, 320, 330, 340) through the optical cable 390. In addition, the optical module 550 receives an optical signal from the remote equipment (RUs, 310, 320, 330, 340) via the optical coupler 590 and converts it into an electrical signal through the photodiode (PD, 570) to fire and wireless unit 515, the tetra part 525, and the PSLTE part 530.

The controller 590 may provide system control and self-diagnostic functions. For example, real-time monitoring of the system path through automatic gain control, real-time control of the system through a graphical user interface, and remote devices switched from downlink to uplink among a plurality of remote devices. Information and self-diagnosis.

7 is a block diagram showing an example of the configuration of the optical module 550 of the master unit (Master Unit, 300, 500) according to the present invention, the optical module 750 is a distributor 760, combiner 780 and Four laser diodes LD1 to LD4 and four photodiodes PD1 to PD4 are included. 8 illustrates an example in which the optical modules 750 and 85 of the master equipment illustrated in FIG. 7 service 32 remote units RU1 to RU32 using the optocouplers 860, 870, 880, and 890. It is shown.

Referring to FIGS. 7 and 8, the fire and wireless units 715 and 812, the disaster broadcasting units 720 and 814, and the tetra units 725 and 816 from the MUX filters 735 and 820 of the wireless communication modules 700 and 80. And a signal obtained by multiplexing the signals of the PSLTE units 730 and 818 to the dividers 760 and 830, the dividers 760 and 830 transmit to the laser diodes LD1 to LD4, respectively. 7 and 8 used four laser diodes LD1 to LD4, but this is scalable. The laser diode LD is a type of electro-optical conversion element for converting an electrical signal into an optical signal. The signals output from the four laser diodes LD1 to LD4 are input to the optocouplers 790, 860, 870, 880, and 890.

Meanwhile, signals output from each of the four photodiodes PD1 to PD4 are input to the combiners 770 and 850, and the combiners 770 and 850 combine the signals input from the four photodiodes PD1 to PD4. It generates one signal and transmits it to the splitters 740 and 825 of the wireless communication module 700 and 80.

Referring to FIG. 8, the optical couplers 860, 870, 880, and 890 transmit and receive optical signals through eight remote devices and optical cables, respectively, to provide wireless communication services to 32 remote units RU1 to RU32. .

Figure 9 is a block diagram showing an example of the implementation of the master unit (Master Unit) of the optical cable-based wireless communication auxiliary system according to the present invention.

10 is a block diagram illustrating an example of a configuration of a remote unit (RU) constituting an optical cable based wireless communication auxiliary facility system according to the present invention. The remote unit may include an optical module 1000, a wireless communication module 1020, and a controller 1070.

When the optical module 1000 receives the wavelength division multiplexed optical signal through the optical coupler 1005 from the master module of the wireless communication auxiliary equipment through the optical coupler 1005, it converts into an electrical signal through the photodiode PD, 1010. When receiving signals of different wavelengths multiplexed from the wireless communication module 1020, the signals are converted into optical signals through the laser diodes LD and transmitted to the master module of the wireless communication auxiliary equipment through the optical cable.

When the wireless communication module 1020 receives the multiplexed signal from the optical module 1000, the wireless communication module 1020 distributes the multiplexed signals into four through the divider 1025 and the fire and wireless unit 1030, the disaster broadcasting unit 1035, and the tetra unit ( 1040 and the PSLTE unit 1045. The fire fighting unit 1030, the disaster broadcasting unit 1035, the tetra unit 1040 and the PSLTE unit 1045 detects the signal of the corresponding band from the received signal and outputs through the antenna 1060. The signals of the corresponding bands are radio communication signals of different frequency bands, the fire extinguishing radio unit 1030 is a fire radio signal of the UHF band, the disaster broadcasting unit 1035 is a disaster broadcasting signal of the FM and terrestrial DMB band, and a tetra unit ( 1040 is a TETRA signal using a TRS (Trunked Radio System) network for emergency communication, and the PSLTE unit 1045 detects a PS (Public Safety) -LTE signal used in a broadband public safety communication network through a band pass filter.

The signal transmitted from the wireless communication device is received by the antenna 1060 and transmitted to the fire fighting radio unit 1030, the tetra unit 1040 and the PSLTE unit 1045 and relayed. The MUX filter 1050 multiplexes the signals output from the fire fighting unit 1030, the tetra unit 1040, and the PSLTE unit 1045 to the LD 1015, and the LD 1015 converts the optical signal into an optical signal. Output through the coupler 1005 to the optical cable.

FIG. 11 illustrates an example of mounting a PS-LTE module instead of a TETRA module as an example of a configuration of a remote unit (RU) according to the present invention and receiving a fire radio signal, a disaster broadcast signal, and a PS-LTE signal. It transmits to the wireless device through the antenna, and receives the fire fighting radio signal and PS-LTE signal from the wireless device and transmits it to the optical cable through the optical module. 12 shows the internal shape of a remote unit (RU) constituting an optical cable based wireless communication auxiliary system according to the present invention.

FIG. 13 shows an example of a structure and an appearance of an optical cable based wireless communication auxiliary system according to the present invention, and includes emergency disaster broadcasting, a main control device, and a PSLTE in a master unit having a rack equipped with multiple communication modules. , A tetra network, a fire fighting radio, and an optical module are respectively installed in a rack, and a wavelength division multiplexed optical signal is output from the optical module to an optical cable and transmitted to a plurality of remote devices. Remote devices receive a wavelength division multiplexed optical signal to provide a multi-communication service.

  FIG. 14 illustrates a system path real-time monitoring and alarm system diagram through automatic gain control in an optical cable based wireless communication auxiliary system according to the present invention. 15 is a diagram illustrating a wireless communication service applying the optical cable-based wireless communication auxiliary system according to the present invention.

On the other hand, Figure 4 is a block diagram showing another embodiment of the configuration of the optical cable-based wireless communication auxiliary system according to the present invention, the master unit (MU (Master Unit), 400) and remote equipment (RUs, 410, 420 , 430, 440.

The master unit (MU) 400 transmits / receives and relays wireless communication signals of different frequency bands, converts an electric signal corresponding to the wireless communication signals into a wavelength division multiplexed optical signal, and outputs the same. The wavelength division multiplexed optical signal received through the optical cable 390 is converted into an electrical signal corresponding to the wireless communication signal and relayed. The radio communication signals of different frequency bands include at least a UHF band fire radio signal, a FM and terrestrial DMB band disaster broadcast signal, and a TETRA signal using a TRS (Trunked Radio System) network for emergency communication; The PS may further include a Public Safety (LTE) signal used in a broadband public safety network.

Remote equipment (RUs, 410, 420, 430, 440) is installed in the basement or high-rise building is not easy to reach the radio waves, each of the remote equipment is connected to each other in series with an optical cable (490).

The remote devices RU1 and 410 transmit and receive wavelength division multiplexed optical signals with the master device 440. When the remote devices RU1 and 410 receive the wavelength division multiplexed signal from the master device 400, the remote devices RU1 and 410 may communicate with the wireless communication devices 450, 460, and 470 in the basement or high-rise buildings where radio waves cannot be smoothly reached. Converts and outputs the wireless communication signal. In addition, the remote devices RU1 and 410 transmit the wavelength division multiplexed signal received from the master device 400 to the remote devices RU2 and 420 through the optical cable 490.

When the remote devices RU2 and 420 receive the wavelength division multiplexed signals from the remote devices RU1 and 410, the remote devices RU2 and 420 convert the signals into wireless communication signals and output the converted signals. The remote devices RU2 and 420 receive the wavelength division multiplexed signals received from the remote devices RU1 and 410. 490) through a remote device (RU3, 430). Similarly, other serially connected remote devices (RU3, RU4) also receive a wavelength division multiplexed signal from the serially connected remote device and convert it into a wireless communication signal and output the wavelength division multiplexed signal received from the serially connected remote device. 490 is transmitted to another remote device connected in series.

On the other hand, the remote devices (RUs, 410, 420, 430, 440) detects the radio signal received from the radio communication device (450, 460, 470) as an electrical signal and converts it into an optical signal and then masters through wavelength division multiplexing Send to equipment 400. At this time, each of the remote devices (RUs, 410, 420, 430, 440) is connected in series with the optical cable 490, combines the optical signals and transmits to the master device (400).

On the other hand, the control unit 580, 780, 895 of the master unit (MU) according to the present invention controls the transmission and reception of wireless communication signals between the master unit (MU) and the remote units (RUs) through the optical cable and performs a self-diagnostic function do. That is, the controllers 580, 780, and 895 of the master unit MU may perform path connection state monitoring, RU system monitoring monitoring, RU RF power monitoring, optical path monitoring of the MU and RU, and gain control of the RU.

The path connection state monitoring may include transmitting information on which RU of the plurality of RUs has an uplink signal switched, and the default link of the RU may be set as a down link.

The RU system monitoring monitoring includes generating an alarm and sending an MU when an abnormal state is detected through power monitoring. The RU RF power monitoring includes alarm generation and transmission to the MU upon detection of system oscillation due to an unknown cause of the RU. The optical path monitoring of the MU and RU includes the generation of an alarm and a transmission to the MU when a change in the overall gain value between the MU and the RU through a regular self-monitoring system is exceeded. In addition, gain control of the RU includes gain control of the RU in the MU equipment located at a remote location.

The control unit of the present invention can be embodied as computer readable code on a computer readable recording medium (including all devices having an information processing function). The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording devices include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

300, 400: master unit (MU) 305: optocoupler
310, 320, 330, 340, 410, 420, 430, 440: remote unit (RU)
350, 360, 370, 380, 450, 460, 470, 480: Wireless communication device
390, 490: optical cable 500, 700, 80: wireless communication module
515, 600, 715, 812: Ministry of Fire and Radio 520, 720, 814: Disaster Broadcasting Department
525,725, 816: Tetra part 530, 730, 818: PS-LTE part
535, 735, 820: MUX filter 540, 740, 825: Splitter
550, 750, 85: optical module 550: laser diode (LD)
570: photodiode (PD) 760, 830: divider
770, 850: Combiner 580, 780, 895: Control
590, 790, 869, 870, 880, 890: Optocouplers
510, 610, 710, 810: antenna 620: switching unit
1000: optical module 1005: optocoupler
1010 photodiode (PD) 1015 laser diode (LD)
1020: wireless communication module 1025: distributor
1050: MUX filter 1060: antenna
1030: Ministry of Fire and Radio 1035: Disaster Broadcasting Department
1040: tetra part 1045: PSLTE part

Claims (4)

In an optical cable-based wireless communication auxiliary facility system that supports inter-floor communication through wireless communication devices between each of the basement floors and the ground floor of a building having a plurality of basement floors where radio waves cannot be smoothly reached during a disaster or in an emergency situation,
Master equipment (MU, 300) having a wireless communication module 500 and the optical module 550;
A plurality of remote devices (RUs, 310, 320, 330, and 340) installed in each of the basement floors and the ground floors, each of which includes an optical module 1000 and a wireless communication module 1020; And
Located between the master device 300 and the plurality of remote devices (310, 320, 330, 340), by generating a wavelength-division multiplexed optical signal output from the master device 300 by the number of the plurality of remote devices The optical device is transmitted to each of the plurality of remote devices (RUs, 310, 320, 330, and 340) through an optical cable, and the wavelength division multiplexed optical signals received from each of the plurality of remote devices are combined to provide the master device (300) through the optical cable. Optocouplers 305 and 590 are delivered to
The wireless communication module 500 of the master device
An antenna 510 for transmitting and receiving the wireless communication signals;
A fire fighting radio unit 515 which transmits and receives a UHF band fire fighting radio signal through the antenna and has a switching unit which switches transmission and reception of a fire fighting radio signal between the antenna 510 and the optical module 550;
Disaster broadcasting unit 520 for receiving the FM and terrestrial Terrestrial Digital Multimedia Broadcasting (DMB) broadcast signal through the antenna 510 and transmits it to the optical module 550;
A tetra unit 525 for transmitting and receiving a TETRA signal using a TRS (Trunked Radio System) network for emergency communication between the antenna 510 and the remote device;
A PSLTE unit 530 which transmits and receives a PS (Public Safety) -LTE signal used in a broadband public safety communication network between the antenna 510 and the remote device;
MUX filter for multiplexing the signals output from the fire fighting unit 515, the disaster broadcasting unit 520, the tetra unit 525 and the PSLTE unit 530 to generate a single signal to transmit to the optical module 550 ( 535); And
A splitter 540 that receives the multiplexed signal from the optical module 550 and transmits the multiplexed signal to the fire fighting wireless unit 515, the tetra unit 520, and the PSLTE unit 530.
The optical module 550 of the master equipment
An optical cable is converted through an optical coupler (305, 590) by converting an electrical signal output from at least one of the fire fighting unit 515, the disaster broadcasting unit 520, the tetra unit 525 and the PSLTE unit 530 into an optical signal. Laser diodes (LD, 560) for transmitting to the plurality of remote devices (RUs, 310 320, 330, 340) through; And
When the optical signal is received from the plurality of remote devices (RUs) via the optical couplers 305 and 590, the optical signals are converted into electrical signals and transmitted to the fire fighting wireless unit 515, the tetra unit 525, and the PSLTE unit 530. Including photodiodes PD and 570,
The optical module 1000 of each of the plurality of remote devices
A photodiode (PD, 1010) for converting a wavelength-division multiplexed optical signal from the master device (300) through an optical cable through an optical coupler (305, 590) and converting it into an electrical signal; And
When receiving the signals of different wavelengths multiplexed from the wireless communication module 1020 of the remote device is provided with a laser diode (LD, 1015) for converting the optical signal to the master device 300 via an optical cable,
The wireless communication module 1020 of each of the plurality of remote devices
An antenna 1060 for transmitting and receiving a signal of the wireless communication device;
A distributor 1025 for distributing the multiplexed signal upon receiving the multiplexed signal from the optical module 1000 of the remote device;
A fire fighting wireless unit 1030 which receives the fire fighting radio signal in the UHF band from the distributor 1025 and outputs the fire fighting radio signal to the antenna 1060 of the remote device;
Disaster broadcasting unit 1035 for receiving the FM and terrestrial DMB broadcast signal from the distributor 1025 and outputs to the antenna of the remote device;
A tetra unit 1040 for receiving a TETRA signal using a TRS (Trunked Radio System) network for emergency communication from the distributor 1025 and outputting the signal to the antenna of the remote device;
A PSLTE unit 1045 for receiving a PS (Location Safety) -LTE signal used in a broadband public safety communication network from the distributor 1025 and outputting the signal to the antenna of the remote device; And
The optical module 1000 of the remote device is generated by multiplexing signals output from at least one of the fire fighting wireless unit 1030, the tetra unit 1040, and the PSLTE unit 1045 from the antenna 1060. A MUX filter 1050 that transmits to
The interlayer communication between the first wireless communication device 350 and the second wireless communication device 360 on different floors is wireless to the first remote device 310 in which the first wireless communication device 350 is installed on the same floor. When the signal is transmitted, the first remote device 310 is converted into an optical signal and transmitted to the master device 300 through the optical cable 390 through the optical coupler (305, 590), the optical coupler 305 , 590 receives the optical signal from the master device 300 and transmits the optical signal to the second remote device 320 through the optical cable 390, the second remote device 320 is the second radio on the same floor. Optical cable based wireless communication auxiliary system, characterized in that for transmitting a wireless signal to the communication device (360). delete delete The method of claim 1, wherein the master equipment (MU)
Real-time monitoring of the system path through automatic gain control, real-time control of the system through the graphical user interface, and provision of information on remote devices that are switched from downlink to uplink among a plurality of remote devices. And a control unit for performing self-diagnosis.

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