WO2010147279A1 - 광 중계 시스템 - Google Patents
광 중계 시스템 Download PDFInfo
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- WO2010147279A1 WO2010147279A1 PCT/KR2009/007730 KR2009007730W WO2010147279A1 WO 2010147279 A1 WO2010147279 A1 WO 2010147279A1 KR 2009007730 W KR2009007730 W KR 2009007730W WO 2010147279 A1 WO2010147279 A1 WO 2010147279A1
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- WIPO (PCT)
- Prior art keywords
- signal
- optical
- signals
- unit
- combiner
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
- H04B10/25754—Star network topology
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
Definitions
- the present invention relates to an optical relay system, and more particularly, to an optical relay system for transmitting a multi-band frequency signal using an optical line.
- an optical repeater is provided that can obtain a predetermined effect at a low price.
- the optical repeater is installed in the area where the radio wave is not received or the radio wave reception is weak, such as inside the building, the basement of the building, the subway, the tunnel, and the apartment complex in the residential area.
- Optical relay system is being used in terms of coverage expansion of base stations to extend service to the region of the region where the signals of base stations are difficult to reach due to special terrain and features.
- a donor unit and a remote unit are connected by an optical cable.
- the donor converts the RF signal received from the base station into an optical signal and transmits the optical signal to the remote unit.
- the remote unit restores the optical signal received from the donor unit to an RF signal and transmits it to the mobile terminal.
- the donor unit of the optical relay system amplifies and adjusts the TX signal to deliver the TX signal received from the base station to the equipment, or a frequency module that amplifies and adjusts the RX signal to deliver the RX signal received from the equipment to the base station. It is provided for each operator's frequency band.
- the donor unit receives a band-limited signal from each frequency module and combines signals of multiple bands into one signal by passing only signals of a desired band and filtering out signals of an undesired band.
- One aspect of the present invention provides an optical relay system for effectively band combining a plurality of band limited signals into one signal and transmitting the same to a plurality of outputs.
- the optical relay system outputs radio signals of various bands received from a base station to at least one optical distribution unit, and outputs radio signals of various bands received from the at least one optical distribution unit.
- a base station interface unit for transmitting to the base station for each frequency band, and converts a radio signal received from the base station interface unit into an optical signal for transmission to at least one optical unit or wirelessly transmits an optical signal received from the at least one optical unit
- a light distribution unit for converting and outputting a signal and an optical unit for converting an optical signal received from the optical distribution unit into a wireless signal and outputting the result to a mobile terminal or converting and outputting a wireless signal received from the mobile terminal into an optical signal;
- the base station interface unit comprises received multiple bands Combines the radio signals of a single signal and distributes the combined signals into a plurality of signals and transmits them to the at least one optical distribution unit, or combines radio signals of multiple bands received from the at least one optical distribution unit into one signal. And transmitting the combined signals to a
- the base station interface unit includes a plurality of main driving base station units MDBU for filtering and amplifying RF signals provided from the base station for each frequency band, and radio signals of various bands output from the plurality of main driving base station units MDBU.
- a main combining / distributing unit (MCDU) for combining the radio signals of the various bands received from the at least one optical distribution unit into one signal using a combiner and distributing the combined signals into a plurality using the divider.
- the main combining / distributing unit MCDU may include a first combiner for combining radio signals of various bands output from the plurality of main driving base station units MDBU into one signal, and an output signal of the first combiner.
- the main combining / distributing unit also includes one modem for communication with the optical unit.
- the transmitter of the modem may be provided between the first combiner and the first distributor, and the receiver of the modem may be provided between the second combiner and the second distributor.
- a plurality of band limited signals may be band-coupled into one signal signal using a combiner instead of a plurality of filters and transmitted to a plurality of outputs using a divider.
- band combining can be performed without damaging the original signal.
- FIG. 1 is a block diagram of an optical relay system according to an embodiment of the present invention.
- BIU base station interface unit
- ODU optical distribution unit
- ROU optical unit
- FIG. 5 is a control block diagram illustrating a schematic configuration of a main combining / distributing unit (MCDU) of the base station interface unit (BIU) shown in FIG. 2.
- MCDU main combining / distributing unit
- BIU base station interface unit
- FIG. 6 is a control block diagram illustrating a schematic configuration of another main combining / distributing unit (MCDU) of the base station interface unit (BIU) shown in FIG. 2.
- MCDU main combining / distributing unit
- the optical relay system outputs radio signals of various bands received from a base station to at least one optical distribution unit, and outputs radio signals of various bands received from the at least one optical distribution unit.
- a base station interface unit for transmitting to the base station for each frequency band, and converts a radio signal received from the base station interface unit into an optical signal for transmission to at least one optical unit or wirelessly transmits an optical signal received from the at least one optical unit
- a light distribution unit for converting and outputting a signal and an optical unit for converting an optical signal received from the optical distribution unit into a wireless signal and outputting the result to a mobile terminal or converting and outputting a wireless signal received from the mobile terminal into an optical signal;
- the base station interface unit comprises received multiple bands Combines the radio signals of a single signal and distributes the combined signals into a plurality of signals and transmits them to the at least one optical distribution unit, or combines radio signals of multiple bands received from the at least one optical distribution unit into one signal. And transmitting the combined signals to a
- the base station interface unit includes a plurality of main driving base station units MDBU for filtering and amplifying RF signals provided from the base station for each frequency band, and radio signals of various bands outputted from the plurality of main driving base station units MDBU, or the And a main combining / distributing unit (MCDU) for combining the radio signals of the various bands received from the at least one optical distribution unit into one signal using a combiner and distributing the combined signals into a plurality using the divider.
- MCDU main combining / distributing unit
- the main combining / distributing unit comprises a first combiner for combining radio signals of various bands output from the plurality of main driving base station units (MDBU) into one signal, and a plurality of output signals of the first combiner.
- the main combining / distributing unit comprises one modem for communication with the optical unit.
- the transmitter of the modem may be provided between the first combiner and the first distributor, and the receiver of the modem may be provided between the second combiner and the second distributor.
- a plurality of band limited signals may be band-coupled into one signal signal using a combiner instead of a plurality of filters and transmitted to a plurality of outputs using a divider.
- band combining can be performed without damaging the original signal.
- An optical relay system is a coverage system for an in-building service that delivers mobile communication voice and data communication with high quality and seamless access.
- it is a distributed antenna system (distributed antenna system) to service the analog and digital telephone system serving in a plurality of bands with one antenna.
- the optical relay system according to the embodiment of the present invention is mainly installed in general public institutions and private facilities such as shopping malls, hotels, campuses, airports, hospitals, subways, general sports grounds, and convention centers.
- the optical relay system improves the poor radio wave environment in a building, and has a weak reception signal strength (RSI) and the overall reception sensitivity of the mobile terminal Ec / Io (chip energy / improves interference, and provides mobile communication to corners of buildings, allowing them to talk freely from anywhere in the building.
- RSI weak reception signal strength
- AMPS Analog Advanced Mobile Phone Service
- TDMA Digital Time-Division Multiplexing Access
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiplex It transmits in building including many mobile communication methods such as Access (WCDMA).
- the optical relay system supports mobile communication standards and air interface protocols used worldwide.
- the frequency is very high Very High Frequency; VHF), Ultra High Frequency (UHF), 700MHz, 800MHz, 850MHz, 900MHz, 1900MHz, and 2100MHz.
- Voice protocols support AMPS, TDMA, CDMA, Global System for Mobile communication (GSM), Integrated Digital Enhanced Network (IDEN), and more.
- the data protocol supports Enhanced Data Rates for GSM Evolution (EDGE), General Packet Radio Service (GPRS), WCDMA, CDMA 2000, and Paging.
- Optical relay system is modularized for each frequency, in order to service the desired frequency in the building, the frequency module is inserted into each unit. It is a one-body type device that transmits multiple signals through one optical cable and does not need to install each new frequency.
- FIG. 1 shows a configuration of an optical relay system according to an embodiment of the present invention.
- an optical relay system includes a base station interface unit (BIU) 20 for interfacing a radio signal with a base station (BTS) 10.
- BIU base station interface unit
- BTS base station
- ROUs Remote Units
- the BIU 20 is connected to each ROU 40 through an optical distribution unit (ODU) 30.
- the ODU 30 receives a radio signal from the upper BIU 20, converts it into an optical signal, and outputs it, and converts the optical signal transmitted from each ROU 40 into a radio signal to the BIU 20. do.
- the BIU 20 may be configured by integrating the ODU 30.
- the BIU 20 serves to supply the TX signals from the BTS 10 or the Bi-directional Amplifier (BDA) to the four ODUs 30.
- the BIU 20 serves to separate the RX signal from the ODU 30 for each frequency band.
- Each ROU 40 is installed in each building or floor of each building.
- FIG. 2 schematically illustrates a configuration of a BIU of an optical relay system according to an exemplary embodiment of the present invention.
- the BIU 20 includes a Main Drive BTS Unit (MDBU) 21 and a Main Com / Div Unit (MCDU) 22.
- the BIU 20 also includes a Main Central Processor Unit (MCPU) 23.
- MDBU Main Drive BTS Unit
- MCDU Main Com / Div Unit
- MCPU Main Central Processor Unit
- the MDBU 21 is a module for transmitting the BTS (BTS # 1-BTS # 4) 10 or the TX signal of the BDA to the equipment or the RX signal of the equipment to the BTS 10 or the BDA.
- the MDBU 21 can monitor the TX input level and automatically adjust the input attenuation through the input automatic gain control (AGC) function.
- the MDBU 21 has an attenuator (ATT) capable of adjusting the gain GAIN of the RX.
- the MDBU 21 is provided for each frequency band.
- the MCDU 22 combines the TX signals transmitted from the MDBU 21 for each frequency band of each operator and serves to transmit the four ODUs 30. In addition, after combining the RX signals transmitted from up to four ODU (30) and delivers up to four MDBU (21). In addition, the MCDU 22 is provided with a port for interfacing with the VHF signal and the UHF signal, and includes an input monitor and an input control ATT.
- the MCPU 23 may inquire and control the status of the module mounted in the BIU 20. It is possible to inquire and control the status of a total of four ODU (30), and can also inquire and control through communication with the ROU 40 connected to the lower.
- an RS-232C port is provided for serial communication, allowing the status and control of the equipment through a computer.
- an Ethernet port and a port for mounting a GSM modem are provided.
- FIG. 3 shows a schematic configuration of an ODU 30 of an optical relay system according to an embodiment of the present invention.
- the ODU 30 receives the RF signal of the TX from the upper BIU 20 and converts the signal into an optical signal.
- This optical signal is transmitted to the ROU 40 through the optical cable 50.
- the optical signal transmitted from the ROU 40 is converted into an RF signal and transmitted to the BIU 20.
- the ODU 30 includes a first divider (N Way Divider; N Way) 31, a first donor optical unit (DOPTIC) 32, and a first combiner (N Way Combiner; N Way) 33. And a second donor light unit (DOPTIC) 34.
- Up to two donor light units (DOPTIC) 32 or 34 may be mounted per one Shelf of the ODU 30.
- the first DOPTIC 32 and the second DOPTIC 34 perform a function of converting a TX RF signal into an optical signal, and a function of converting an RX optical signal into an RF signal.
- DOPTICs 32 and 34 for example, support four optical ports. Therefore, one ODU 30 may be connected to eight ROUs 40.
- the first DOPTIC 32 and the second DOPTIC 34 have an optical splitter embedded therein to divide the optical signal emitted from the laser diode LD into four optical ports.
- a total of four photo diodes (PDs) are built into the RX to photoelectrically convert signals received at each optical port.
- the optical compensation ATT for compensation according to the loss of the optical cable 50 is built.
- the WDM is built therein so that only one ROU 40 and the optical cable 50 to be transmitted are used.
- the maximum number of ODUs 30 that can be connected to the BIU 20 is four.
- the first divider (N Way) 31 distributes one TX RF signal to two.
- the first combiner (N Way) 33 performs a function of combining two RX RF signals into one.
- the first distributor 31 and the first coupler 33 have two couplers in one module, and are used for the TX / RX, respectively.
- the first divider 31 and the first combiner 33 are designed in a wide band so as to combine and distribute signals from modem signals to 2 GHz or more.
- FIG. 4 shows a schematic configuration of an ROU 40 of an optical relay system according to an embodiment of the present invention.
- the ROU 40 includes a remote drive unit (RDU) 41 and a remote central processor unit having a band pass filter (BPF) 42.
- RDU remote drive unit
- BPF band pass filter
- RCPU Processor Unit
- ROPTIC Remote OPTIC convert unit
- Multiplexer 45 Multiplexer
- the ROU 40 receives an optical signal of TX from the ODU 30 and converts the optical signal into an RF signal.
- the converted RF signal is amplified by a high power amplifier in the corresponding RDU 41, band filtered while passing through the BPF 42, and then radiated to the antenna ANT by a multiplexer 46. do.
- the RX signal received through the antenna ANT is filtered by the corresponding RDU 41 and transmitted to the ROPTIC 44 by filtering the out-of-band signal to be transmitted to the ODU 30, which is an upper device.
- Up to three RDUs 41 can be mounted, and the modules are configured with up to dual bands.
- the RDU 41 performs a function of filtering and amplifying the TX signal, and performs a function of filtering and amplifying the RX signal.
- the BPF 42 connected to the RDU 41 performs a function of removing other signals.
- the RDU 41 filters TX signals of each band received through the ROPTIC 44 and amplifies them with a high power amplifier.
- the RX signal received through the multiplexer 46 is filtered and amplified to deliver to the ROPTIC (44). Inside, there's a built-in ATT to adjust the gain. There are different RDUs for each frequency band.
- the ROPTIC 44 performs a function of converting the TX optical signal into an RF signal. In addition, the ROPTIC 44 performs a function of converting the RX RF signal into an optical signal. In addition, the ROPTIC 44 performs a function of converting an optical signal into an RF signal and a function of converting an RF signal into an optical signal. In addition, the ROPTIC 44 has a modem 46 therein to communicate with the host device. In addition, the ROPTIC 44 has an optical compensation ATT therein to perform optical compensation according to optical loss.
- the RCPU 43 controls the signal of each unit and monitors the states of the BIU 20, the ODU 30, and the like through the modem 46.
- the RCPU 43 may monitor and control each module of the ROU 40, receive the upper communication data from the ROPTIC 44, analyze the module, and report its state value to the upper stage.
- There is an LED indicator on the front of the module so that you can check the status of the system at once.
- the RCPU 43 can check and control the status of the equipment through a computer or the like through the RS-232C serial port.
- the multiplexer 45 performs a function of combining the TX signals of two RDUs 41.
- the RX signal is divided into two RDUs 41 as an example.
- the multiplexer 45 transmits and receives various frequency bands by using one antenna ANT.
- the multiplexer 45 is a module for combining or distributing a plurality of signals into one antenna. There is a port that can combine multiple signals, and the input / output port of the RDU 41 is connected to the corresponding port.
- FIG. 5 shows a schematic configuration of the MCDU 22 of the BIU 20 shown in FIG.
- the MCDU 22 converts four band-limited TX RF signals A, B, C, and D transmitted from each MDBU 21 into one signal (A + B + C + D).
- N Way Divider (N Way) 221 is provided. The output signal of this first distributor 221 is transmitted to each ODU 30.
- the MCDU 22 converts four RX RF signals A ', B', C ', and D' received from each ODU 30 into one signal (A '+ B' + C '+ D').
- N-Way combiner (N Way) 222 and the output signal (A '+ B' + C '+ D') of the second combiner 222 is divided into a plurality of identical signals.
- a second divider (N Way Divider; N Way) 223 is provided. The output signal of this second divider 223 is output to each MDBU 21.
- a plurality of band limited signals can be band-coupled into one signal using a combiner and divider without using a filter and transmitted to multiple outputs.
- band combining can be performed without damaging the original signal.
- each ROU 40 In general, communication between the BIU 20 and each ROU 40 should be made for status checking or various control.
- a modem is conventionally installed in each ROU 40, and correspondingly, each modem is installed in the BIU 20 for each ODU 30.
- the ODU 30 is four, four modems are installed in the BIU 20.
- the number of ROUs 40 increases, the number of ODUs 30 correspondingly increases, so that the number of modems installed in the BIU 20 increases, thereby increasing the manufacturing cost.
- FIG. 6 shows a schematic configuration of another MCDU 22 of the BIU 20 shown in FIG. 2.
- the MCDU 22 converts four band-limited TX RF signals A, B, C, and D transmitted from each MDBU 21 into one signal (A + B + C + D).
- the MCDU 22 converts four RX RF signals A ', B', C ', and D' received from each ODU 30 into one signal (A '+ B' + C '+ D').
- N-Way combiner (N Way) 222 and the output signal (A '+ B' + C '+ D') of the second combiner 222 is divided into a plurality of identical signals.
- a second divider (N Way Divider; N Way) 223 is provided.
- the MCDU 22 also has one modem 224 for communication with each ROU 40.
- the transmitter (modem TX) 224a of the modem 224 is provided between the first combiner 220 and the first distributor 221.
- the receiver (modem RX) 224b of the modem 224 is provided between the second combiner 222 and the second distributor 223.
- the MCPU 23 performs the state inquiry and control of a total of four ODUs 30 using this one modem 224, and performs the inquiry and control through communication with the ROU 40 connected to the lower level. Therefore, even if a single modem 224 is provided in the BIU 20, communication with each ROU 40 is possible, thereby significantly reducing the number of modems, simplifying control, lowering manufacturing costs, and minimizing product size. have.
- the MCDU 22 combines four TX RF signals transmitted from the MDBU 21 for each frequency band into one TX RF signal, distributes the same four signals to each ODU 30.
- the modem signal M is added to the TX RF signal and transmitted to the ROU 40.
- the MCDU 22 combines the RX RF signals transmitted from the four ODUs 30 into one RX RF signal, and distributes the same four signals to each MDBU 21. At this time, the modem signal transmitted by being combined with the RX RF signal is extracted and delivered to the MCPU 23.
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Abstract
Description
Claims (5)
- 기지국으로부터 수신된 여러 대역의 무선신호를 적어도 하나의 광 분배유닛에 출력하고, 상기 적어도 하나의 광 분배유닛으로부터 수신된 여러 대역의 무선신호를 각 주파수 대역별로 상기 기지국에 전송하는 기지국 인터페이스 유닛과,상기 기지국 인터페이스 유닛으로부터 수신된 무선신호를 광 신호로 변환하여 적어도 하나의 광 유닛에 전송하거나 상기 적어도 하나의 광 유닛으로부터 수신된 광 신호를 무선신호로 변환하여 출력하는 광 분배유닛과,상기 광 분배유닛으로부터 수신된 광 신호를 무선신호로 변환하여 이동 단말기에 출력하거나 상기 이동 단말기로부터 수신된 무선신호를 광 신호로 변환하여 출력하는 광 유닛을 포함하고,상기 기지국 인터페이스 유닛은 수신된 여러 대역의 무선신호를 하나의 신호로 결합하고 결합된 신호를 다수 개로 분배하여 상기 적어도 하나의 광 분배유닛에 전송하거나, 상기 적어도 하나의 광 분배유닛으로부터 수신된 여러 대역의 무선신호를 하나의 신호로 결합하고 결합된 신호를 다수 개로 분배하여 상기 기지국으로 전송하는 것을 포함하는 광 중계 시스템.
- 제1항에 있어서, 상기 기지국 인터페이스 유닛은 상기 기지국으로부터 제공된 RF 신호를 주파수 대역별로 필터링 및 증폭하는 복수의 메인 구동 기지국 유닛(MDBU)과, 상기 복수의 메인 구동 기지국 유닛(MDBU)으로부터 출력된 여러 대역의 무선신호 혹은 상기 적어도 하나의 광 분배유닛으로부터 수신된 여러 대역의 무선신호를 결합기를 이용하여 하나의 신호로 결합하고 결합된 신호를 분배기를 이용하여 다수 개로 분배하는 메인 결합/분배 유닛(MCDU)을 포함하는 광 중계 시스템.
- 제2항에 있어서, 상기 메인 결합/분배 유닛(MCDU)은 상기 복수의 메인 구동 기지국 유닛(MDBU)으로부터 출력된 여러 대역의 무선신호를 하나의 신호로 결합하는 제1 결합기와, 상기 제1 결합기의 출력신호를 다수 개로 분배하는 제1 분배기와, 상기 적어도 하나의 광 분배유닛으로부터 수신된 여러 대역의 무선신호를 하나의 신호로 결합하는 제2 결합기와, 상기 제2 결합기의 출력신호를 다수 개로 분배하는 제2 분배기를 포함하는 광 중계 시스템.
- 제3항에 있어서, 상기 메인 결합/분배 유닛(MCDU)은 상기 광 유닛과의 통신을 위한 한 개의 모뎀을 포함하는 광 중계 시스템.
- 제4항에 있어서, 상기 모뎀의 송신부는 상기 제1 결합기와 상기 제1 분배기사이에 마련되고, 상기 모뎀의 수신부는 상기 제2 결합기와 상기 제2 분배기사이에 마련되는 것을 포함하는 광 중계 시스템.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/378,695 US8577222B2 (en) | 2009-06-16 | 2009-12-23 | Optical repeater system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2009-0053319 | 2009-06-16 | ||
KR1020090053319A KR100940517B1 (ko) | 2009-06-16 | 2009-06-16 | 광 중계 시스템 |
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WO2010147279A1 true WO2010147279A1 (ko) | 2010-12-23 |
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PCT/KR2009/007730 WO2010147279A1 (ko) | 2009-06-16 | 2009-12-23 | 광 중계 시스템 |
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US (1) | US8577222B2 (ko) |
KR (1) | KR100940517B1 (ko) |
WO (1) | WO2010147279A1 (ko) |
Families Citing this family (3)
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US9596140B2 (en) * | 2013-03-07 | 2017-03-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and arrangements for providing radio access at local site |
KR101791636B1 (ko) * | 2016-03-28 | 2017-10-30 | 주식회사 쏠리드 | 기지국 신호 정합 장치, 이를 포함하는 기지국 인터페이스 유닛 및 분산 안테나 시스템 |
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