CN106160866B - Optical fiber repeater branch transmission method and by-passing type optical fiber repeater - Google Patents
Optical fiber repeater branch transmission method and by-passing type optical fiber repeater Download PDFInfo
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- CN106160866B CN106160866B CN201610856465.6A CN201610856465A CN106160866B CN 106160866 B CN106160866 B CN 106160866B CN 201610856465 A CN201610856465 A CN 201610856465A CN 106160866 B CN106160866 B CN 106160866B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 53
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- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 238000004891 communication Methods 0.000 claims abstract description 29
- 230000003044 adaptive effect Effects 0.000 claims abstract description 17
- 230000005622 photoelectricity Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 102100031235 Chromodomain-helicase-DNA-binding protein 1 Human genes 0.000 description 2
- 101000777047 Homo sapiens Chromodomain-helicase-DNA-binding protein 1 Proteins 0.000 description 2
- 238000005314 correlation function Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
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- BPJREJZJPCLZIP-UHFFFAOYSA-N 4-(diazoniomethylidene)-7-(diethylamino)chromen-2-olate Chemical compound [N-]=[N+]=CC1=CC(=O)OC2=CC(N(CC)CC)=CC=C21 BPJREJZJPCLZIP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
-
- 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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
- H04B10/802—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections for isolation, e.g. using optocouplers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Optical Communication System (AREA)
Abstract
The present invention describes one kind by power supply, microprocessor, antenna-feeder system, wireless receiver, wireless transmitter, optical fiber, analog-digital converter and digital analog converter, adaptive multiplexer and time-division demultiplexer, wireless signal combiner device, optical transmission signal adapter, the by-passing type optical fiber repeater of the module compositions such as optical communication interface, realize a kind of optical fiber repeater branch transmission method, wireless communications relay transmission service can be provided for the various types of wireless communication systems user being in Special section and tunnel, antenna and number of fibers can be reduced, improve relay transmission distance, reduce system cost, it is interfered with each other between reduction system, and have the characteristics that can be suitably used for carrying out relay transmission to various wireless communication system.
Description
Technical field
The present invention is wireless communications relay transmission technology, is suitable for passing the relaying of the wireless communication system of feeble field section
It is defeated, belong to wireless communication technology field.
Background technology
In current wireless system, there are various wireless communication system, as GSM, CDAM, WCDMA, TD-SCDAM,
The wireless communication systems such as CDMA2000 have respective dedicated optical fiber straight above-mentioned wireless communication system in existing technology
It puts station and is used as trunking, but due to some Special sections and tunnel, the antenna peace brought due to its position, track clearance
The limitation of the conditions such as space limitation, number of fibers is filled, the network planning of each wireless communication system is inconsistent, the base of each system
Station location, optical transport routing length and user distribution it is inconsistent, interfere with each other and system interval from degree require etc. factors influence,
In that region, all trunkings cannot be all installed on to the relaying need for wherein removing to meet each wireless communication system
It asks, therefore existing optical fiber repeater cannot meet in such region and be wanted to the trunking traffic of each wireless communication system user
It asks；It is with close correlation technique of the invention：The patent No. 2009102162372, optical fiber repeater method for transmission processing and change
Channel transmission type optical fiber repeater wherein describing some schemes to solve the above problems, but in correlation technique, uses wave
Divide multiplexing technology, in terms of current technological development situation, the channel utilization of wavelength-division multiplex technique is not high, and cost is big, transmission range
It is not remote enough, the needs of practical application cannot be met.
Invention content
In view of the foregoing, the purpose of the present invention is to provide a kind of optical fiber repeater branch transmission method and by-passing type light
Fine repeater so that optical fiber repeater can provide nothing for the various types of wireless communication systems user being in Special section and tunnel
The transmission service of line communication relay meets reduction antenna amount, reduction interferes with each other and meets using between number of fibers, reduction system
System interval can realize the long range light between optical fiber repeater when optical fiber cascades each optical fiber repeater from requirements such as degree
Transmission trunking, and have the characteristics that can be suitably used for carrying out relay transmission to various wireless communication system;
In order to achieve the above objectives, the present invention introduces a kind of optical fiber repeater branch transmission method, includes power supply, microprocessor
Device, antenna-feeder system, splitter, combiner, wireless receiver, wireless transmitter, optical fiber, analog-digital converter, digital analog converter, when
Division multiplexer and time-division demultiplexer, photoelectric converter, it is characterised in that working method is transmitted using following signals：
（1）The output signal of antenna-feeder system is handled by splitter, the signal difference of each frequency range received is defeated
It is sent to corresponding wireless receiver；
（2）By the transmitting signal of each wireless transmitter by being transferred to antenna feeder after filtering, duplex isolation and combining processing
System；
（3）The output signal of each wireless receiver is digitized coding by analog-digital converter, it then will be digital
Coding is sent by the different channels and photoelectric converter of adaptive multiplexer to optical fiber transport channel；
（4）By the output signal of a channel of a time-division demultiplexer by digital signal restoring device restore after with certain
Coding is digitized by analog-digital converter after the output signal combining of one wireless receiver, then passes through adaptive multiplexer
One other channel and photoelectric converter sent to optical fiber transport channel；
（5）The output signal of two channels of time-division demultiplexer is restored by digital analog converter and passes through certain after being combined
One wireless transmitter is sent.
To realize that above-mentioned working method, the present invention also introduce a kind of by-passing type optical fiber repeater, it is characterised in that in branch
There are one wireless signal combiner device, multiple optical transmission signal adapters, an optical communication interfaces in formula optical fiber repeater, wirelessly
There are one multichannel work(combiner device, multiple duplexers and multiple system filters, multiple reception signals to filter in signal combiner device
Wave device, multiple transmitting traffic filters, a pair of of photoelectricity transmission converter have multipair modulus to turn in the photoelectricity transmission converter
Parallel operation and digital analog converter, a pair of of adaptive multiplexer and time-division demultiplexer, a pair of of photoelectric converter；Multichannel work(combiner device
Combining end is connected with antenna-feeder system, the branch end of multichannel work(combiner device respectively with a port phase of each system filter
Connection, the another port of each system filter are connected with the input/output terminal of corresponding duplexer respectively, each duplexer
It receives signal output end to be respectively connected with corresponding reception traffic filter input terminal, each reception traffic filter output end point
Signal input part is not received with corresponding wireless receiver to be connected, each wireless receiver receive signal output end respectively with it is corresponding
Optical transmission signal adapter signal input part be connected, the transmitting signal input part of each duplexer is believed with corresponding transmitting respectively
Number filter output is connected, each transmitting traffic filter input terminal respectively with the transmitting signal output of corresponding wireless transmitter
End is connected, each wireless transmitter transmitting signal input part respectively with corresponding optical transmission signal adapter signal output end phase
It connects, there are one send power splitter, two transmission combiners, two reception power splitters, one in each optical transmission signal adapter
A reception combiner, the reception signal output end of corresponding wireless receiver are connected with the input terminal for sending power splitter, send
The output end of power splitter is connected from the input terminal of different transmission combiners respectively, receive the input terminal of power splitter respectively with number
The output end of mode converter is connected, the input terminal of each digital analog converter electricity with the different channels of time-division demultiplexer respectively
Signal output end is connected, and an output end for receiving power splitter is connected with the input terminal for receiving combiner respectively, receives and closes
The output end of road device is connected with the transmitting signal input part of corresponding wireless transmitter, connects the output end of digital analog converter
An output end for receiving power splitter is connected by a transmission combiner with the input terminal of an analog-digital converter, the modulus
The output end of converter is connected with the electric signal input end of adaptive multiplexer channel, and there are one light in optical communication interface
Branch's combiner, a multi-direction type optical branch combiner are received and dispatched, light receives and dispatches the light receiving signal output end and light of branch's combiner
The light receiving signal input terminal of electrical transmission converter is connected, and the light that light receives and dispatches branch's combiner sends signal input part and photoelectricity
The light of transmission converter sends signal output end and is connected, light receive and dispatch the optical signal combining input/output terminal of branch's combiner with it is more
It is connected to an input/output terminal of formula optical branch combiner, other input/output terminals point of multi-direction type optical branch combiner
It is not connected with outside line optical fiber.
The working principle and beneficial effect of the present invention
The output signal of antenna-feeder system is isolated and is filtered by work(point, duplex, by each frequency range received
Signal is respectively delivered to corresponding wireless receiver, by the transmitting signal of each wireless transmitter by filtering, duplex isolation and
It is transferred to antenna-feeder system after combining processing, in above-mentioned processing procedure, under the processing of filter, by the frequency of each wireless system
Band is isolated, and the isolation of different operating frequency range between each system is improved, and under the isolation of duplexer, improves each system
Receive-transmit isolation, under using work(point and the processing mode being combined, it is possible to reduce use antenna amount, convenient in special area and
Installation in tunnel；The output signal of wireless receiver is digitized after coded treatment by two of adaptive multiplexer not
Cochannel is sent to optical fiber transport channel；By the output signal of a channel of time-division demultiplexer carry out after digital-to-analogue conversion with nothing
The output signal of line receiver is combined, then will be combined signal and given one other channel after digital coding by adaptive multiplexer
It is sent to optical fiber, is combined after the output signal of two channels of time-division demultiplexer is carried out digital-to-analogue conversion, then passes through
Wireless transmitter is sent；Use such optical transport mode：Transmission signal is given after digital coding is handled in light
It is transmitted in Transmission system, and each optical fiber repeater uses different time division multiplex channels in different position sections, in light
When transmission trunking by the way of changing channel, so that it may to reduce interfering with each other in optical fiber transmission, therefore light can be reduced
Fine quantity, and can realize that the long distance optic transmission between optical fiber repeater relays when optical fiber cascades each optical fiber repeater.
Description of the drawings
Fig. 1 is the by-passing type optical fiber repeater entirety electrical schematic diagram of one embodiment of the invention；
Fig. 2 is the detailed electrical schematic diagram of the by-passing type optical fiber repeater of one embodiment of the invention；
Fig. 3 be one embodiment of the invention by-passing type optical fiber repeater in optical communication interface composition figure.
Specific implementation mode
Illustrate the embodiment of the present invention by taking attached drawing as an example below；
In Fig. 1 to Fig. 3 be identically numbered corresponding device and module title and function is identical；
Fig. 1 is the by-passing type optical fiber repeater entirety electrical schematic diagram of one embodiment of the invention, wherein：A is wireless signal point
Combiner, B-1~B-n are wireless receiver, and C-1~C-n is wireless transmitter, and D-1~D-n turns for optical transmission signal
Device is connect, E is the adaptive multiplexer with opto-electronic conversion, and F is the time-division demultiplexer with opto-electronic conversion, and G is optical communication interface, and H is
External optical fiber；
Fig. 2 is the detailed electrical schematic diagram of the by-passing type optical fiber repeater of one embodiment of the invention, wherein identical to function
Circuit part has done omission and has indicated, D-1 is only indicated if optical transmission signal adapter, and others are identical structure；
In the A of Fig. 2：（1）For work(combiner device, using the power splitter for capableing of transmitted in both directions；（2）- 1~（2）~
N is system filter, according to use site it needs to be determined that its quantity, it is determined by the bandwidth of operation of each wireless communication system
Transmission bandwidth and associated transport index, and transmitted in both directions can be carried out；（3）- 1~（3）- n is duplexer, according to use site
It needs to be determined that its quantity, its transmission bandwidth and associated transport index are determined by the bandwidth of operation of each wireless communication system；（4）
1~（4）- n is to receive traffic filter, and the index of system requirements is selected to determine its transmission objective；（5）- 1~（5）- n is hair
Traffic filter is penetrated, the index of system requirements is selected to determine transmission objective；B-1~B-n is wireless receiver, and selection system is wanted
The index asked determines the correlation functions such as its gain, bandwidth, conversion system and index；C-1~C-n is wireless transmitter, selection
The index of system requirements determines the correlation functions such as its gain, bandwidth, conversion system and index；
In the D-1 of Fig. 2：（7）、（10）、（11）For power splitter, using conventional power splitter；（8）、（9）、（12）For
Combiner, using conventional combiner both can, can also use and be capable of the power splitter of reverse transfer as combiner；E is photoelectric transfer
The transmitting portion of defeated converter, wherein including analog-digital converter, adaptive multiplexer and photoelectric converter, F turns for photoelectricity transmission
The receiving portion of parallel operation, wherein including photoelectric converter time-division demultiplexer and digital analog converter；E, F therein are dashed box figure
Mark, i.e., E, F are not included in D-1；CHD1, CHD1 ' are the different electric input and output of adaptive multiplexer and time-division demultiplexer
Transceiver channel；
Fig. 3 be one embodiment of the invention by-passing type optical fiber repeater in optical communication interface composition figure, wherein：G passes for light
Defeated interface, in the G of Fig. 3,（a）Branch combiner is received and dispatched for light, using two splitter of conventional fiber,（b）For multi-direction type
Optical branch combiner, fundamental characteristics are the optical signal inputted from each optical interface, can be exported from other optical interfaces,
It is composed using multiple optical branching devices；
As specified above and diagram configures each function module, component, connection related device module and this can be completed
The implementation of invention.
The present invention can also be that the output signal by each wireless receiver in by-passing type optical fiber repeater is answered by the time-division
It is sent to optical fiber transport channel with multiple and different channels of device, after the output signal of multiple channels of time-division demultiplexer is combined
It is sent by some wireless transmitter, the present invention can be made to have the function of multi-direction transmission in application in this way,
Wider application is enabled the invention to.
The present invention, which can also be in the multi-direction type optical branch combiner in by-passing type optical fiber repeater, multiple optical branch
Device, each branch port of each optical branching device are connected two-by-two respectively with a certain branch port of other all optical branching devices
It connects, the input/output interface of the combining port of each optical branching device as external optical transport, so that the present invention is easy to implement.
The present invention describes one kind by power supply, microprocessor, antenna-feeder system, wireless receiver, wireless transmitter, light
Fine, analog-digital converter and digital analog converter, adaptive multiplexer and time-division demultiplexer, wireless signal combiner device, optical transport letter
The by-passing type optical fiber repeater of the module compositions such as number adapter, optical communication interface realizes a kind of optical fiber repeater branch transmission
Method can provide wireless communications relay transmission clothes for the various types of wireless communication systems user being in Special section and tunnel
Business can be reduced and be interfered with each other between antenna and number of fibers, raising relay transmission distance, reduction system cost, reduction system, and
Have the characteristics that can be suitably used for carrying out relay transmission to various wireless communication system.
Claims (4)
1. a kind of optical fiber repeater branch transmission method, include power supply, microprocessor, antenna-feeder system, splitter, combiner,
Wireless receiver, wireless transmitter, optical fiber, analog-digital converter, digital analog converter, adaptive multiplexer and time-division demultiplexer, light
Electric transducer, it is characterised in that working method is transmitted using following signals：
(1) output signal of antenna-feeder system is handled by splitter, the signal of each frequency range received is respectively delivered to
Corresponding wireless receiver；
(2) by the transmitting signal of each wireless transmitter by being transferred to antenna-feeder system after filtering, duplex isolation and combining processing；
(3) output signal of each wireless receiver is digitized coding by analog-digital converter, then by digital coding
It is sent to optical fiber transport channel by the different channels and photoelectric converter of adaptive multiplexer；
(4) by the output signal of a channel of a time-division demultiplexer by digital signal restoring device restore after with some
Coding is digitized by analog-digital converter after the output signal combining of wireless receiver, then passes through the another of adaptive multiplexer
One channel and photoelectric converter are sent to optical fiber transport channel；
(5) output signal of two channels of time-division demultiplexer is restored by digital analog converter and passes through some after being combined
Wireless transmitter is sent.
2. a kind of by-passing type optical fiber repeater, it is characterised in that there are one wireless signal combiners in by-passing type optical fiber repeater
Device, multiple optical transmission signal adapters, an optical communication interface, there are one multichannel work(combiners in wireless signal combiner device
Device, multiple duplexers and multiple system filters, multiple reception traffic filters, multiple transmitting traffic filters, a pair of of photoelectricity
Transmission converter has multipair analog-digital converter and digital analog converter, a pair of of adaptive multiplexer in the photoelectricity transmission converter
And time-division demultiplexer, a pair of of photoelectric converter；The combining end of multichannel work(combiner device is connected with antenna-feeder system, multichannel work(point
The branch end of combiner is connected with a port of each system filter respectively, the another port point of each system filter
Be not connected with the input/output terminal of corresponding duplexer, the reception signal output end of each duplexer respectively with corresponding reception signal
Filter input end is connected, and each reception traffic filter output end receives signal input part with corresponding wireless receiver respectively
It is connected, each wireless receiver receives signal output end and is connected respectively with corresponding optical transmission signal adapter signal input part
It connects, the transmitting signal input part of each duplexer is connected with corresponding transmitting traffic filter output end respectively, each transmitting letter
Number filter input end is connected with corresponding wireless transmitter transmitting signal output end respectively, and each wireless transmitter emits signal
Input terminal is connected with corresponding optical transmission signal adapter signal output end respectively, has one in each optical transmission signal adapter
A transmission power splitter, two transmission combiners, two reception power splitters, a reception combiner, corresponding wireless receiver
It receives signal output end and is connected with the input terminal for sending power splitter, the output end for sending power splitter is closed from different transmissions respectively
The input terminal of road device is connected, and the input terminal for receiving power splitter is connected with the output end of digital analog converter respectively, each digital-to-analogue
The input terminal of converter is connected with the electrical signal of the different channels of time-division demultiplexer respectively, receives the one of power splitter
A output end is connected with the input terminal for receiving combiner respectively, receives the output end of combiner and corresponding wireless transmitter
Transmitting signal input part is connected, and an output end for connecting the reception power splitter of the output end of digital analog converter is sent out by one
Combiner and the input terminal of an analog-digital converter is sent to be connected, the output end of the analog-digital converter and the one of adaptive multiplexer
The electric signal input end of channel is connected, and there are one light transmitting-receiving branch combiner, a multi-direction type optical branch in optical communication interface
Combiner, light receive and dispatch the light receiving signal input terminal phase of the light receiving signal output end and photoelectricity transmission converter of branch's combiner
Connection, the light of light transmitting-receiving branch combiner send signal input part and are connected with the light of photoelectricity transmission converter transmission signal output end
It connects, light receives and dispatches an input/output terminal of optical signal the combining input/output terminal and multi-direction type optical branch combiner of branch's combiner
It is connected, other input/output terminals of multi-direction type optical branch combiner are connected with outside line optical fiber respectively.
3. by-passing type optical fiber repeater as claimed in claim 2, it is characterised in that by the output signal of each wireless receiver
It is sent to optical fiber transport channel by multiple and different channels of adaptive multiplexer, by the output of multiple channels of time-division demultiplexer
It is sent by some wireless transmitter after signal combining.
4. by-passing type optical fiber repeater as claimed in claim 3, it is characterised in that multidirectional in by-passing type optical fiber repeater
There are multiple optical branching devices, each branch port of each optical branching device and other all optical branch in formula optical branch combiner
Some branch port of device is connected two-by-two respectively, and the combining port of each optical branching device is defeated as the input of external optical transport
Outgoing interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610856465.6A CN106160866B (en) | 2016-09-28 | 2016-09-28 | Optical fiber repeater branch transmission method and by-passing type optical fiber repeater |
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| CN201610856465.6A CN106160866B (en) | 2016-09-28 | 2016-09-28 | Optical fiber repeater branch transmission method and by-passing type optical fiber repeater |
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| CN106160866B true CN106160866B (en) | 2018-09-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107104697B (en) * | 2017-03-06 | 2019-07-12 | 上海乾视通信技术有限公司 | A kind of multi-band communication intrinsic safety base station |
| CN111970062A (en) * | 2019-05-20 | 2020-11-20 | 江苏永鼎通信有限公司 | Digital processing method for digital optical fiber repeater transmission system |
| CN111970059A (en) * | 2019-05-20 | 2020-11-20 | 江苏永鼎通信有限公司 | Digital optical fiber repeater transmission system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688260A (en) * | 1985-10-09 | 1987-08-18 | Westinghouse Electric Corp. | High-reliability fiber optic repeater |
| CN101123463A (en) * | 2007-08-10 | 2008-02-13 | 福建邮科通信技术有限公司 | Implementation method for remote distance relay of TD-SCDMA repeater |
| CN101729150A (en) * | 2009-11-18 | 2010-06-09 | 耿直 | Transmission treatment method of optical fiber repeater and variable-channel transmission optical fiber repeater |
-
2016
- 2016-09-28 CN CN201610856465.6A patent/CN106160866B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688260A (en) * | 1985-10-09 | 1987-08-18 | Westinghouse Electric Corp. | High-reliability fiber optic repeater |
| CN101123463A (en) * | 2007-08-10 | 2008-02-13 | 福建邮科通信技术有限公司 | Implementation method for remote distance relay of TD-SCDMA repeater |
| CN101729150A (en) * | 2009-11-18 | 2010-06-09 | 耿直 | Transmission treatment method of optical fiber repeater and variable-channel transmission optical fiber repeater |
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Effective date of registration: 20191210 Address after: 518000 201, No. 6, Lane 2, No. 6 Industrial Zone, Songhe community, Longhua street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Julong Brothers Industrial Co.,Ltd. Address before: Zhejiang Huatang Jinting Town Village 312458 city of Shaoxing province Shengzhou City Xiao Kang group of door of No. 111 Patentee before: SHENGZHOU WANZHI NETWORK TECHNOLOGY CO.,LTD. |
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Denomination of invention: Fiber optic repeater branch transmission method and branch type fiber optic repeater station Effective date of registration: 20231113 Granted publication date: 20180928 Pledgee: Shenzhen Rural Commercial Bank Co.,Ltd. Longhua Sub branch Pledgor: Shenzhen Julong Brothers Industrial Co.,Ltd. Registration number: Y2023980065359 |
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