CN207910785U - A kind of Front-haul fibre-optic transmission system (FOTS)s based on core type multiplexing - Google Patents
A kind of Front-haul fibre-optic transmission system (FOTS)s based on core type multiplexing Download PDFInfo
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- CN207910785U CN207910785U CN201820339404.7U CN201820339404U CN207910785U CN 207910785 U CN207910785 U CN 207910785U CN 201820339404 U CN201820339404 U CN 201820339404U CN 207910785 U CN207910785 U CN 207910785U
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- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 229940085805 fiberall Drugs 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 abstract description 9
- 238000013459 approach Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
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- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
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- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
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- 230000010365 information processing Effects 0.000 description 1
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Abstract
Present patent application proposes a kind of Front haul fibre-optic transmission system (FOTS)s being multiplexed based on core type；The system can provide seven times of capacity of single mode optical fiber Transmission system；Or the Front haul transmission pressure on capacity or rate is reduced to 1/7th of single mode optical fiber Transmission system；Seven core fibre of system provides new approaches and guarantee for mobile communication Front haul long spans transmission under special applications scene.
Description
Technical field
Present patent application is related to a kind of Front-haul fibre-optic transmission system (FOTS)s being multiplexed based on core type, and it is logical to can be applied to optical fiber
The fields such as letter, optical-fiber wireless access, optical Information Processing and generation information technology.
Background technology
As data communication is continuously increased with multimedia service demand, mobile communication rapid development simultaneously constantly meets people
Communication requirement；However, the front end delivery interface that existing mobile communications network uses is deposited in terms of data rate, bandwidth, time delay
In significant limitation；For such case, the units such as China Mobile Communications Research Institute propose next-generation forward pass interface NGFI
(Next Generation Front-haul Interface) [1 China mobile research institute, et
Al. White Paper of Next Generation Fronthaul Interface, v1.0 (2015)] to meet
The demand of five third-generation mobile communications (5G) development；NGFI refers to that Base-Band Processing function is penetrated with distal end in next generation wireless network main equipment
Front-haul forward pass interfaces between frequency processing function, provide five kinds of interface splitting schemes, analogue transmission both may be used,
Digital transmission technology can be used again to reduce to system parameter requirement, can flexibly accept or reject, be mobile communication Front-haul forward pass
The further research of network provides important references.In recent years, wireless cloud center (RCC, the radio cloud in NGFI
Center) the high speed of the Front-haul optical fiber transmission between far end radio frequency system (RRS, radio remote system)
Rate, high power capacity, long span demand increasingly increase severely.Meanwhile as wireless multiple-input, multiple-output (MIMO) technology is wireless in 4G, 5G and future
Application in communication has been further exacerbated by Front-haul transmission pressure [2 X. Liu, H. Zeng, N. Chand, and
F. Effenberger, "Bandwidth-Efficient Mobile Fronthaul Transmission for Future
5G Wireless Networks," in Asia Communications and Photonics Conference 2015,
C. Lu, J. Luo, Y. Ji, K. Kitayama, H. Tam, K. Xu, P. Ghiggino, and N. Wada,
eds., OSA Technical Digest (Optical Society of America, 2015), paper
ASu3E.4]；Certainly, conventional radio MIMO technical research outputs and inputs number [3 Chi-Hsiang also in less at present
Lin, Chun-Ting Lin, Hou-Tzu Huang, Wei-Siang Zeng, Shou-Chih Chiang, and Hsi-
Yu Chang, "60-GHz optical/wireless MIMO system integrated with optical
subcarrier multiplexing and 2x2 wireless communication," Opt. Express 23,
12111-12116 (2015)]；The research of extensive mimo antenna also also in strategic concept and preliminarily theoretical simulation stage,
Really it is still necessary to want long period [4 E. Larsson, O. Edfors, F. Tufvesson, T. for deployment and realization
Marzetta, “Massive MIMO for next generation wireless systems,”IEEE
Communications Magazine, 52(2): 186-195 (2014)；5 L. Lu, G. Y. Li, A. L.
Swindlehurst, A. Ashikhmin, R. Zhang, “An Overview of Massive MIMO: Benefits
and Challenges,” IEEE Journal of Selected Topics in Signal Processing, 8(5):
742-758 (2014)； 6 J. Shen, S. Suyama, T. Obara, Y. Okumura, “Requirements of
power amplifier on super high bit rate massive MIMO OFDM transmission using
higher frequency bands,” Globecom Workshops (GC Wkshps), 2014: 433-437].In this way,
Current urgent communication requirement and MIMO technology bring Front-haul optical fiber and transmit the immense pressure on capacity and rate,
Although can exponentially reduce transmission rate by filtering and compressing, still Front-haul optical transport networks are caused greatly
Pressure, to the following Front-haul transmission be a huge challenge [1； 7 Yiran Ma, Zhiguang Xu,
Chengliang Zhang, Huafeng Lin, Qing Wang, Min Zhou, Heng Wang, Jingwen Yu,
and Xiaomu Wang, "Demonstration of digital fronthaul over self-seeded WDM-PON
in commercial LTE environment," Opt. Express 23, 11927-11935 (2015)； 8 Y. Ma,
Z. Xu, H. Lin, M. Zhou, H. Wang, C. Zhang, J. Yu, and X. Wang, "Demonstration
of CPRI over Self-seeded WDM-PON in Commercial LTE Environment," in Optical
Fiber Communication Conference, OSA Technical Digest(Optical Society of
America, 2015), paper M2J.6； 9 M. Zhu, X. Liu, N. Chand, F. Effenberger, and
G. Chang, "High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier
Aggregation and 8×8 MIMO," in Optical Fiber Communication Conference, OSA
Technical Digest (Optical Society of America, 2015), paper M2J.3 ]。
Meanwhile core type multiplexing and mode multiplexing and its being combined as space division multiplexing（SDM）Important technology have become light
The forward position research hotspot of the communications field.With one fibre core difference of a covering of single mode optical fiber, multi-core optical fiber is a common packet
The multiple fibre cores of layer；Multi-core optical fiber（MCF）In each fibre core be counted as the subchannel of parallel transmission；Core type multiplexing based on MCF
Substantially it is a natural multiple-input and multiple-output（MIMO）System is field ultrahigh speed, vast capacity, extra long distance, the height
Spectrum effect transmits most potential one of realization method, has extremely wide application prospects and development space [10 Jun
Sakaguchi, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi,
Tetsuya Hayashi, Toshiki Taru, Tetsuya Kobayashi, and Masayuki Watanabe, "
Space Division Multiplexed Transmission of 109-Tb/s Data Signals Using
Homogeneous Seven-Core Fiber," J. Lightwave Technol. 30, 658-665 (2012)；11
Koji Igarashi, Koki Takeshima, Takehiro Tsuritani, Hidenori Takahashi, Seiya
Sumita, Itsuro Morita, Yukihiro Tsuchida, Masateru Tadakuma, Koichi Maeda,
Tsunetoshi Saito, Kengo Watanabe, Katsunori Imamura, Ryuichi Sugizaki, and
Masatoshi Suzuki, "110.9-Tbit/s SDM transmission over 6,370 km using a full
C-band seven-core EDFA," Opt. Express 21, 18053-18060 (2013)；12 Koki
Takeshima, Takehiro Tsuritani, Yukihiro Tsuchida, Koichi Maeda, Tsunetoshi
Saito, Kengo Watanabe, Toru Sasa, Katsunori Imamura, Ryuichi Sugizaki, Koji
Igarashi, Itsuro Morita, and Masatoshi Suzuki, "51.1-Tbit/s MCF Transmission
Over 2520 km Using Cladding-Pumped Seven-Core EDFAs," J. Lightwave
Technol.34, 761-767 (2016)；13 H. Ji, L. Yi, L. Xue, M. Tang, y. Fu, Z. Feng,
L. Gan, and W. Hu, "700G/280G SDM-TWDM-PON over 20km Seven-Core Fibre based
on 10G-Class Optical Components," in Asia Communications and Photonics Conference 2016, OSA Technical Digest (online) (Optical Society of America,
2016), paper AF3A.2.]。
Utility model content
In view of the above-mentioned problems, in state natural sciences fund (number 61671227 and 61431009）, nature section of Shandong Province
NSF National Science Foundation（ZR2011FM015）, " Mount Taishan scholar " construction project specific project expenditure support under, present patent application proposes one kind and is based on
The Front-haul fibre-optic transmission system (FOTS)s of core type multiplexing；The Transmission system that present patent application is proposed often increases a fibre core letter
Number, Front-haul transmission capacities are doubled than standard single mode system；It is capable of providing the more of multiple identical as fibre core number
Double capacity；It effectively solves the problems, such as that the transmission of Front-haul optical fiber increasingly increases severely in capacity, rate requirement, Front- can be solved
The spectrum efficiency of haul optical fiber transmission, lower deployment cost, scaling difficulty etc. facing challenges, to be moved under special applications scene
It communicates the transmission of Front-haul long spans and new approaches and guarantee is provided.
Technical solution is used by present patent application solves its technical problem：
For the active demand of mobile communication Front-haul optical fiber transmission capacities under special applications scene, present patent application
Propose a kind of Front-haul fibre-optic transmission system (FOTS)s being multiplexed based on core type；The system includes wireless cloud center RRC, optical fiber biography
Transmission link and radio frequency stretch system RRS；Wherein, wireless cloud center RRC specifically includes RRC Base-Band Processings end and the ports NGFI, seven
Core Fan-in coupling device；Fiber transmission link is seven core fibre transmission links；Radio frequency stretch system RRS is fanned out to coupling including seven cores
Device, seven enter seven and go out photodetection and data and radio frequency processing module, n × n radio MIMO antenna transmitting modules；RRC Base-Band Processings
End is connected to seven core fibre transmission links through seven core Fan-in coupling devices respectively with the ports NGFI；Seven core fibre transmission link output ends
It is fanned out to coupler by seven cores and is connected to seven road single mode optical fibers, each fibre core of seven core fibres corresponds to single mode optical fiber all the way；Seven tunnel is single
Mode fiber is connected respectively to seven and enters seven seven input terminals for going out photodetection and data and radio frequency processing module；Seven, which enter seven, goes out photoelectricity
Detection and seven output ends of data and radio frequency processing module are connected to seven n × n radio MIMO antenna transmitting modules；RRC bases
Tape handling end exports six phase co-wavelengths with the ports NGFI and is either fanned respectively through seven cores close to the signal of wavelength or different wave length
Enter coupler and be coupled to seven core fibre transmission links to be transmitted；And then enter in radio frequency stretch system RRS；It is fanned by seven cores
Go out coupler and be coupled to seven road single mode signals, each core signal corresponds to single mode signal all the way；Later, the seven roads single mode signal warp
Seven, which enter seven, goes out after photodetection and data are handled with radio frequency processing module to be respectively outputted to seven n × n radio MIMO antennas transmittings
Module is emitted；Each n × n radio MIMO antenna transmitting modules（N=1,2,3,256）, corresponding 1 wired input
End and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules have the function of independent transmission and joint emission function；Seven
A n × n radio MIMOs antenna transmitting module may make up whole 7n × 7n radio MIMOs antenna emission part using joint emission function
Point；If n=1, antenna can be integrally formed the emitting portion of 7 × 7 radio MIMO antennas；If n=2, antenna can be integrally formed 14 × 14
The emitting portion of radio MIMO antenna.
The advantageous effect of present patent application is：
1. the system that present patent application is proposed uses seven core fibres, system transmission capacity, spectrum utilization are effectively improved
Rate；The index distribution of each fibre core is identical, and groove is used to assist index distribution to reduce crosstalk；System often increases by one
Core signal, Front-haul transmission capacities are doubled than standard single-mode fiber Transmission system, can be increased to seven times of biographies
Defeated capacity；It, can be radio MIMO if keeping each core signal and standard single-mode fiber Transmission system equivalent data rates capacity
The diversity gain or spatial multiplexing gain of antenna or both EQ Gain are increased to seven times；Under identical antenna channel capacity situation,
Front-haul transmission pressure of the system that present patent application is proposed on capacity or rate is reduced to standard single-mode fiber biography
/ 7th of defeated system；
2. correspondence system is transmitted using the close either phase co-wavelength of wavelength or different wave length, in system
Laser, photoelectric detection module performance are not strict with, and system complexity and cost can be effectively reduced；
3. the Transmission system that present patent application proposes is that mobile communication Front-haul optical fiber transmits under special applications scene
Provide new approaches and guarantee.
Description of the drawings
Fig. 1 is a kind of Front-haul fibre-optic transmission system (FOTS) schematic diagrames being multiplexed based on core type of present patent application.The system
It is divided into 3 function modules：1 is wireless cloud center RRC, and 2 be fiber transmission link, and 3 be radio frequency stretch system RRS；Wherein, wirelessly
Cloud center RRC includes RRC Base-Band Processings end and the ports NGFI（1）, seven core Fan-in coupling devices（2）；Fiber transmission link is seven cores
Fiber transmission link（3）；Radio frequency stretch system RRS is fanned out to coupler including seven cores（4）, seven enter seven go out photodetection and data with
Radio frequency processing module（5）, seven n × n radio MIMO antenna transmitting modules（6）（7）（8）（9）（10）（11）（12）；RRC base band
Processing end and the ports NGFI（1）Respectively through seven core Fan-in coupling devices（2）It is connected to seven core fibre transmission links（3）；Seven core fibres
Transmission link（3）Output end is fanned out to coupler by seven cores（4）Seven road single mode optical fibers are connected to, each fibre core of seven core fibres corresponds to one
Road single mode optical fiber；The seven roads single mode optical fiber, which is connected respectively to seven and enters seven, goes out photodetection and data and radio frequency processing module（5）'s
Seven input terminals；Seven, which enter seven, goes out photodetection and data and radio frequency processing module（5）Seven output ends be connected to seven n × n
Radio MIMO antenna transmitting module（6）（7）（8）（9）（10）（11）（12）；Each n × n radio MIMO antenna transmitting modules（n=
1,2,3,256）, correspond to 1 wired input end and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules
Have the function of independent transmission and joint emission function；Seven n × n radio MIMO antenna transmitting modules can using joint emission function
Constitute entirety 7n × 7n radio MIMO antenna emitting portions；If n=1, antenna can be integrally formed the transmitting of 7 × 7 radio MIMO antennas
Part；If n=2, antenna can be integrally formed the emitting portion of 14 × 14 radio MIMO antennas；
Fig. 2 is seven core fibre cross-sectional views；All fibre cores are made of pure silicon dioxide；It is each for ease of identifying
Fibre core is embedded in a label Marker；Fibre core spacing is 45 μm, and cladding diameter is 150 μm, a diameter of 256 μm of coat
[10]；
Wherein, Fig. 2 using in document [10] seven core fibres and its data illustrate seven core fibre better performances；Seven core
Optical fiber can be applied in this patent system；It is of course also possible to which seven core fibres in document [11-13] are applied to this patent system
System；Can also this patent system be built using the multi-core optical fiber of more fibre cores.
Specific implementation mode
The technical solution of the utility model patent application is described in detail with reference to embodiment and attached drawing, but protection domain is not
It is limited to this.
1 Fig. 1 of embodiment is a kind of Front-haul fibre-optic transmission system (FOTS) schematic diagrames being multiplexed based on core type of present patent application.
The system is divided into 3 function modules：1 is wireless cloud center RRC, and 2 be fiber transmission link, and 3 be radio frequency stretch system RRS；Its
In, wireless cloud center RRC includes RRC Base-Band Processings end and the ports NGFI（1）, seven core Fan-in coupling devices（2）；Fiber transmission link
It is seven core fibre transmission links（3）；Radio frequency stretch system RRS is fanned out to coupler including seven cores（4）, seven enter seven go out photodetection and
Data and radio frequency processing module（5）, seven n × n radio MIMO antenna transmitting modules（6）（7）（8）（9）（10）（11）（12）；
RRC Base-Band Processings end and the ports NGFI（1）Respectively through seven core Fan-in coupling devices（2）It is connected to seven core fibre transmission links（3）；Seven
Core fibre transmission link（3）Output end is fanned out to coupler by seven cores（4）It is connected to seven road single mode optical fibers, each fibre core of seven core fibres
Corresponding single mode optical fiber all the way；The seven roads single mode optical fiber, which is connected respectively to seven and enters seven, goes out photodetection and data and radio frequency processing module
（5）Seven input terminals；Seven, which enter seven, goes out photodetection and data and radio frequency processing module（5）Seven output ends be connected to seven
N × n radio MIMO antenna transmitting modules（6）（7）（8）（9）（10）（11）（12）；RRC Base-Band Processings end and the ports NGFI（1）It is defeated
Go out six phase co-wavelengths either close to the signal of wavelength or different wave length respectively through seven core Fan-in coupling devices（2）It is coupled to seven cores
Fiber transmission link（3）It is transmitted；And then enter in radio frequency stretch system RRS；It is fanned out to coupler by seven cores（4）Coupling
To seven road single mode signals, each core signal corresponds to single mode signal all the way；Later, which enters seven through seven and goes out photoelectricity
Detection and data and radio frequency processing module（5）Seven n × n radio MIMO antenna transmitting modules are respectively outputted to after processing（6）（7）
（8）（9）（10）（11）（12）Emitted；Each n × n radio MIMO antenna transmitting modules（N=1,2,3,256）,
Corresponding 1 wired input end and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules have the function of independent transmission with
Joint emission function；It is wireless that seven n × n radio MIMO antenna transmitting modules use joint emission function to may make up whole 7n × 7n
Mimo antenna emitting portion；If n=1, antenna can be integrally formed the emitting portion of 7 × 7 radio MIMO antennas；If n=2, antenna can
It is integrally formed the emitting portion of 14 × 14 radio MIMO antennas.
Fig. 2 is seven core fibre cross-sectional views；All fibre cores are made of pure silicon dioxide；It is each for ease of identifying
Fibre core is embedded in a label Marker；Fibre core spacing is 45 μm, and cladding diameter is 150 μm, a diameter of 256 μ of coat
m；The index distribution of each fibre core is identical, and groove is used to assist index distribution to reduce crosstalk；Seven core fibre fibre cores exist
1550 nm's decays to 0.175-0.181 dB/km；Effective area is 78.2-81.3 μm2；Dispersion, chromatic dispersion gradient and cut-off
Wavelength is respectively 22.1-22.2 ps/nm/km, 0.062 ps/nm/km and 1483-1509 nm [10].
Wherein, Fig. 2 using in document [10] seven core fibres and its data illustrate seven core fibre better performances；Seven core
Optical fiber can be applied in this patent system；It is of course also possible to which seven core fibres in document [11-13] are applied to this patent system
System；Can also this patent system be built using the multi-core optical fiber of more fibre cores.
In short, present patent application proposes a kind of Front-haul fibre-optic transmission system (FOTS)s being multiplexed based on core type；System is adopted
It is transmitted with the close either phase co-wavelength of wavelength or different wave length, to the laser in system, photoelectric detection module
Can there is no strict requirements, system complexity and cost can be substantially reduced；System realizes core type multiplexing using seven core fibres；Each
The index distribution of fibre core is identical, and groove is used to assist index distribution to reduce crosstalk；What present patent application was proposed is
System often increases a core signal, and Front-haul transmission capacities are doubled than standard single-mode fiber Transmission system, can
It is increased to seven times of transmission capacities；It, can be if keeping each core signal and single mode optical fiber Transmission system equivalent data rates capacity
The diversity gain or spatial multiplexing gain of radio MIMO antenna or both EQ Gain are increased to seven times；In identical antenna channel capacity
In the case of, the Front-haul transmission pressure of system that present patent application is proposed on capacity or rate is reduced to single mode optical fiber
/ 7th of Transmission system；The availability of frequency spectrum improves；Cost-effective reduction；The system that present patent application proposes is special applications
The transmission of mobile communication Front-haul optical fiber provides new approaches and guarantee under scene.
It should be pointed out that specific implementation mode is the more representational example of present patent application, it is clear that this patent
The technical solution of application is not limited to the above embodiments, and can also have many variations, and such as seven core fibres can be changed to more fibre cores
Optical fiber.Those skilled in the art define disclosed or are had no according to the written description of file different with present patent application
Obtaining for view, is considered as this patent scope of the claimed.
Claims (1)
1. a kind of Front-haul fibre-optic transmission system (FOTS)s based on core type multiplexing；It is characterized in that：The system is divided into wireless cloud
Heart RRC, fiber transmission link and radio frequency stretch system RRS totally three function modules；Wherein, wireless cloud center RRC includes RRC bases
Tape handling end and the ports NGFI（1）, seven core Fan-in coupling devices（2）；Fiber transmission link is seven core fibre transmission links（3）；It penetrates
Frequency far-drawing system RRS is fanned out to coupler including seven cores（4）, seven enter seven and go out photodetection and data and radio frequency processing module（5）, seven
A n × n radio MIMOs antenna transmitting module（6）（7）（8）（9）（10）（11）（12）；RRC Base-Band Processings end and the ports NGFI（1）
Respectively through seven core Fan-in coupling devices（2）It is connected to seven core fibre transmission links（3）；Seven core fibre transmission links（3）Output end by
Seven cores are fanned out to coupler（4）Seven road single mode optical fibers are connected to, each fibre core of seven core fibres corresponds to single mode optical fiber all the way；Seven tunnel is single
Mode fiber, which is connected respectively to seven and enters seven, goes out photodetection and data and radio frequency processing module（5）Seven input terminals；Seven, which enter seven, goes out
Photodetection and data and radio frequency processing module（5）Seven output ends be connected to seven n × n radio MIMO antenna transmitting modules
（6）（7）（8）（9）（10）（11）（12）；RRC Base-Band Processings end and the ports NGFI（1）Export six phase co-wavelengths or close to wave
Long or different wave length signal is respectively through seven core Fan-in coupling devices（2）It is coupled to seven core fibre transmission links（3）It is transmitted；
And then enter in radio frequency stretch system RRS；It is fanned out to coupler by seven cores（4）It is coupled to seven road single mode signals, each fibre core letter
Number corresponding single mode signal all the way；Later, which enters seven through seven and goes out photodetection and data and radio frequency processing module
（5）Seven n × n radio MIMO antenna transmitting modules are respectively outputted to after processing（6）（7）（8）（9）（10）（11）（12）It is sent out
It penetrates；Each n × n radio MIMO antenna transmitting modules（N=1,2,3,256）, correspond to 1 wired input end and n hair
Penetrate antenna；Each n × n radio MIMO antenna transmitting modules have the function of independent transmission and joint emission function；Seven n × n without
Line mimo antenna transmitting module may make up whole 7n × 7n radio MIMOs antenna emitting portion using joint emission function；If n=1,
Antenna can be integrally formed the emitting portion of 7 × 7 radio MIMO antennas；If n=2, antenna can be integrally formed 14 × 14 radio MIMO days
The emitting portion of line.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7543789B2 (en) | 2020-09-01 | 2024-09-03 | 住友電気工業株式会社 | Multi-core optical fiber and multi-core optical fiber cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7543789B2 (en) | 2020-09-01 | 2024-09-03 | 住友電気工業株式会社 | Multi-core optical fiber and multi-core optical fiber cable |
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