CN108847891A - A kind of distributed small base station system of light-carried wireless electricity - Google Patents
A kind of distributed small base station system of light-carried wireless electricity Download PDFInfo
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- CN108847891A CN108847891A CN201810539751.9A CN201810539751A CN108847891A CN 108847891 A CN108847891 A CN 108847891A CN 201810539751 A CN201810539751 A CN 201810539751A CN 108847891 A CN108847891 A CN 108847891A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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Abstract
The present invention provides a kind of distributed small base station system of light-carried wireless electricity, including small base station unit and ROF far-end unit, small base station unit are connect with ROF far-end unit using optical fiber, and analog-modulated radiofrequency signal is carried on optical fiber；The small base station unit, between the modulation /demodulation of finishing service data, modulated signal and radiofrequency signal mutual conversion and radiofrequency signal to simulated light mutual conversion；The ROF far-end unit, for completing simulated light to the mutual conversion of radiofrequency signal and power amplification and the transmission duplex of radiofrequency signal.Compared to integrated scytoblastema station system, this system, which is able to achieve, zooms out covering, greatly improves small base station area coverage, reduces unit area and covers cost, it is easier to realize fining covering.The present invention can be widely used in petty dealer area, hotel, teahouse, public place of entertainment etc. and separate more movable signal covering application scenarios, and the equipment cost of unit area covering is compared integrated scytoblastema station with installation maintenance cost and is all greatly lowered.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of distributed small base station system of light-carried wireless electricity.
Background technique
With China Mobile market access 5G (the 5th third-generation mobile communication) epoch, traditional distributed coverage system is due to adopting
Signal covering, transmission of the such devices to 2.6GHz and the above high-frequency signal are completed with radio frequency feed line and a large amount of power splitter
Be lost it is very big so that signal source draws the electromagnetic radiation connect when power is big, high-power radiofrequency signal is transmitted in compartment system
Greatly, the problems such as user's terminal transmitting power is big, construction coordination difficulty is big is prominent, has not been suitable for the 5G system in future.In addition, existing
There is integrated scytoblastema station list station to only have several meters because of the small covering radius of power, it is difficult to solve such as hotel, public place of entertainment etc. to be separated
The signal covering problem of scene.
Summary of the invention
For the problem of current radio signal in-door covering described above, the present invention provides a kind of distributions of light-carried wireless electricity
The small base station system of formula effectively reduces transmission loss difference between different frequency signals using digital data transmission mode, and reduction is penetrated
Frequency signal transmission attenuation；Using Distributed coverage, whole system is extended to by small range covering of singly standing and is covered on a large scale.
Technical solution of the present invention provides a kind of light-carried wireless electricity distributed small base station system, for 5G communication system mostly every
Disconnected scene, including small base station unit and ROF far-end unit, small base station unit is connect with ROF far-end unit using optical fiber, on optical fiber
Analog-modulated radiofrequency signal is carried, the ROF indicates light-carried wireless electricity,
The small base station unit, for the phase between the modulation /demodulation of finishing service data, modulated signal and radiofrequency signal
Mutually conversion and radiofrequency signal to simulated light mutual conversion；
The ROF far-end unit is put for completing simulated light to the mutual conversion of radiofrequency signal and the power of radiofrequency signal
Big and transmission duplex.
Moreover, the small base station unit includes business interface and baseband processing unit 101, radio frequency front-end unit 102, simulation
Laser 103 and monitoring unit 104, business interface and baseband processing unit 101 connect radio frequency front-end unit 102, radio-frequency front-end
Unit 102 connects analog laser 103, and monitoring unit 104 connects business interface and baseband processing unit 101 and radio-frequency front-end list
Member 102.
Moreover, the small base station unit course of work is as follows,
Down direction, 101 access service data of business interface and baseband processing unit, is handled by baseband modulation and demodulation,
Issue radio frequency front-end unit 102, radio frequency front-end unit 102 is analog signal by digital-to-analogue conversion signal, by up-conversion and
Each laser 103 is issued after branch amplification；Monitoring unit 104 issues the long-range monitoring information to ROF far-end unit, warp simultaneously
It crosses radio frequency front-end unit 102 and issues the submitting of laser 103；
Up direction, laser 103 receives the upstream data from each ROF far-end unit, by radio frequency front-end unit
102 revert to digital signal to business interface and baseband processing unit 103, demodulated, decode and frame decoding after, isolate monitoring
Back information is reduced into business datum passback by business interface to monitoring unit 104, by master data.
Moreover, the ROF far-end unit include analog laser 201, it is combining and distribution unit 202, power amplifier 203, double
Work device 204, low-noise amplifier 205, gain control unit 206 and monitoring unit 207, analog laser 201 connect co-shunt
Unit 202, combining and distribution unit 202 through power amplifier 203 connect duplexer 204, duplexer 204 through low-noise amplifier 205,
Gain control unit 206 connects combining and distribution unit 202.
Moreover, the ROF far-end unit course of work is as follows,
Down direction, downlink signal is reverted to radio-frequency carrier by laser 201, and is filtered and separated by combining and distribution unit 202
Traffic carrier and monitoring carrier wave out, wherein monitoring carrier wave, which gives monitoring unit 207, carries out dissection process, traffic carrier is put through power
Big device 203, power amplifier 203 promote traffic carrier signal level, and output power grade is adjusted by monitoring unit 207, real
Existing different covering demand；Downlink signal passes through duplexer 204 after amplification, is launched by external or built-in antenna；
Up direction, antenna receive the uplink signal that each terminal is sent, through duplexer 204 to low-noise amplifier 205
It amplifies, gain control unit 206 realizes the gain control of uplink signal, and combining and distribution unit 202 is by uplink main signal and prison
The monitoring return path signal combining that control unit 207 is sent, mixed carrier are directly modulated into optical signal by laser 201, pass through optical fiber
It is back to small base station unit.
Moreover, small base station unit connects multiple ROF far-end units, Star Network is formed.
Moreover, the expanded simulated light interface of ROF far-end unit cascades other ROF far-end units, chain network is formed.
The distributed small base station system of light-carried wireless electricity of the present invention, realizes that the wireless signal indoor based on small base station covers
Lid, compared with traditional indoor distributed system, has the following advantages that：
1, compared with no source chamber subsystem：Inactive component does not take electricity, can not control power, is fixed attenuator by link
Debugging；No source chamber point is very big in frequency applications link attenuation, may not apply to the 5G system of 4.9GHz；Using of the present invention
The power loss and electromagnetic radiation that system does not have feeder line transmission to introduce.The included monitoring of each ROF far-end unit of this system is single
Member can independent control transmission power, remotely can control coverage power by central machine room, realize each floor, each region it is fine
Change covering.It is transmitted using optical fiber, for transmission link not by frequency influence, transmission loss is very small.
2, compared with traditional small base station of integration：The short distance that the small base station of tradition is only able to achieve near the installation site of base station is covered
Lid；And the small base station unit of this system and ROF far-end unit are zoomed out using optical transport, using zooming distributed covering, are extended and are covered
Lid range, ROF far-end unit are free of Digital Signal Processing and digital-to-analogue conversion, only radio-frequency front-end, and distal end is small in size.
3, this system uses distributed structure/architecture, it is possible to provide access capacity, extension extend over；With conventional digital remote base station
It compares, the processing of this system primary digital signal and passback part are placed in central machine room, Digital Signal Processing is distally free of, point
The small-power distal end that cloth is laid, can accomplish the uniform fold of signal；Far-end unit extends to different partition spaces, each
Distal end coverage power can single optimization；The high-power covering distal end general 20L or more of volume, this system distal end volume is only within 2L,
It is laid and hidden camouflage convenient for interior.
System of the present invention can be widely used in the movable signals such as petty dealer area, hotel, public place of entertainment covering application scenarios,
Unit area overlay device cost compared with installation maintenance cost it is high-power zoom out distal end and integrated base station all reduce by 30% with
On, there is great market value, will be the key development direction in future communications field, be to guarantee that China is led in international 5G industry
First horizontal important foundation technology.
Detailed description of the invention
Fig. 1 is the whole schematic diagram of the embodiment of the present invention.
Fig. 2 is the small base station unit structural block diagram of the embodiment of the present invention.
Fig. 3 is the ROF far-end unit structural block diagram of the embodiment of the present invention.
Specific embodiment
In conjunction with the embodiments below by embodiment, the technical solutions of the present invention will be further described.
The present invention is directed to more partition scenes of 5G communication system, provides a kind of light-carried wireless electric (ROF) distributed small base station
System, including small base station unit and ROF far-end unit, small base station unit and ROF far-end unit are connect using optical fiber, on optical fiber with
The form of photon carries modulated radio signal.
The distributed small base station system of light-carried wireless electricity of the embodiment of the present invention consists of two parts：Small base station unit and ROF
Far-end unit.Wherein, small base station unit finishing service data to digital modulation signals modulation /demodulation, digital modulation signals with penetrate
The mutual conversion of mutual conversion and radiofrequency signal between frequency signal to light.ROF far-end unit completes light to the phase of radiofrequency signal
Mutually conversion, the power amplification of radiofrequency signal and transmission duplex.
Small base station unit can connect multiple ROF far-end units, and ROF far-end unit can also extend optical interface to cascade it
His ROF far-end unit realizes the networking of the variforms such as star-like, chain, can also pass through optical-fiber network extended coverage range.
As shown in Figure 1, the typical distributed small base station system of light-carried wireless electricity is by small base station unit 100, ROF far-end unit
200 compositions.Wherein, small base station unit can also extend the multiple ROF far-end units of connection, constitute star topology network.
The present invention proposes, between small base station unit and each ROF far-end unit, is connected using optical fiber, transmits radio frequency thereon
Signal carries the business datum of radio-frequency carrier and the monitoring of control signal specific modulation (such as frequency shift keying fsk modulation) carrier wave
Information.ROF far-end unit, which need to only carry out photoelectric conversion, can restore radiofrequency signal, without carrying out digital processing and frequency spectrum shift,
Reduce unit complexity.In the entire system, ROF unit only has radio frequency processing function, and function is simply at low cost, the distal end ROF
Unit dosage is the largest, and can reduce whole system cost of investment and maintenance cost in this way.In addition, the modulation band of optical transceiver
Width is very wide, covers current all mobile communication standard frequency ranges, thus system can easily realize the wireless signal of various standards
Transmission, and can be inserted into monitoring, the customized carrier wave such as auxiliary activities in unoccupied frequency range, need to be filtered point in receiving end
From.
The downlink of system refers to signal from small base station unit to the treatment process of ROF far-end unit, and uplink is
Refer to signal from ROF far-end unit to the treatment process of small base station unit.
The downlink of system is described as follows：
Small base station unit access service data are parsed, framing, coding, modulation, up-convert to radio frequency after digital to analog conversion
Signal is converted into optical signal by directly modulating optical transceiver, passes through fiber optic stretch to corresponding ROF far-end unit.The distal end ROF is single
Member restores radiofrequency signal by photoelectric conversion, is launched after power amplification by internal or external antenna.
Uplink is described as follows：
ROF far-end unit receives the uplink signal that terminal is sent, sharp by directly modulating after power amplification and gain control
Light device is directly changed into optical signal, is transmitted to the small base station unit connected.Small base station unit receives on each road ROF far-end unit
The signal of biography is reduced into business datum after being sequentially completed photoelectric conversion, signal combining, down coversion, analog-to-digital conversion, digital demodulation,
It completes to return by interface unit.
Each unit is described as follows in embodiment：
1. small base station unit
The small base station unit of system, as shown in Fig. 2, by business interface and baseband processing unit 101, radio frequency front-end unit
102, laser 103, monitoring unit 104 and power supply unit 105 form.Business interface and baseband processing unit 101 connect radio frequency
Front end unit 102,102 connecting laser 103 of radio frequency front-end unit, monitoring unit 104 connect business interface and Base-Band Processing list
Member 101 and radio frequency front-end unit 102.
Its link connection relationship is：
Business interface and baseband processing unit 101, radio frequency front-end unit 102, laser 103, which are sequentially connected, constitutes downlink chain
Road；Laser 103, radio frequency front-end unit 102, business interface and baseband processing unit 101 are sequentially connected composition uplink.Tool
When body is implemented, same link is can be used in uplink and downlink, using different optical wavelength.It is possible to further which multiple lasers are arranged
103, multilink is provided and realizes networking.Each laser 103 is connect with radio frequency front-end unit 102 respectively.
Monitoring unit 104 realizes the monitoring to itself each modular unit and multiple ROF far-end units.Power supply unit 105 is real
Now to the energy supply of each active module embedded therein unit, when specific implementation, accordingly connect according to the chip that each unit uses.
Its working principle is that：
Down direction, 101 access service data of business interface and baseband processing unit, is handled by baseband modulation and demodulation,
Issue radio frequency front-end unit 102, radio frequency front-end unit 102 is analog signal by digital-to-analogue conversion signal, by up-conversion and
Each laser 103 is issued after branch amplification.Monitoring unit 104 issues the long-range monitoring information to ROF far-end unit simultaneously, together
Sample issues the submitting of laser 103 by radio frequency front-end unit 102.
Up direction, laser 103 receives the upstream data from each ROF far-end unit, by radio frequency front-end unit
102 revert to digital signal to business interface and baseband processing unit 103, are demodulated, are decoded, after frame decoding, isolating monitoring
Back information is reduced into business datum passback by business interface to monitoring unit 104, by master data.
Power supply unit 105 completes input power conversion, provides required operating voltage for each active module embedded therein unit.
2.ROF far-end unit
The ROF far-end unit of system, as shown in figure 3, by laser 201, combining and distribution unit 202, power amplifier 203,
Duplexer 204, low-noise amplifier 205, gain control unit 206, monitoring unit 207, power supply unit 208 form.Laser
201 connection combining and distribution units 202, combining and distribution unit 202 connect duplexer 204 through power amplifier 203, and duplexer 204 is through low
Noise amplifier 205, gain control unit 206 connect combining and distribution unit 202, and monitoring unit 207 connects combining and distribution unit 202.
Its link connection relationship is：
Laser 201, combining and distribution unit 202, power amplifier 203, duplexer 204 are sequentially connected composition downlink；
Duplexer 204, low-noise amplifier 205, gain control unit 206, combining and distribution unit 202, laser 201 are sequentially connected composition
Uplink.
Monitoring unit 207 realizes monitoring to each modular unit in ROF far-end unit, and micro process can be used in when specific implementation
Device is realized.Power supply unit 208 realizes to the energy supply of each active module embedded therein unit, the core that when specific implementation uses according to each unit
Piece accordingly connect.
Its working principle is that：
Down direction, downlink signal is reverted to radio-frequency carrier by laser 201, and is filtered and separated by combining and distribution unit 202
Traffic carrier and monitoring carrier wave out.Wherein monitoring carrier wave gives monitoring unit 207 and carries out dissection process, and traffic carrier is put through power
Big device 203.Power amplifier 203 promotes traffic carrier signal level, and output power grade can be adjusted by monitoring unit 207,
Realize different covering demands.Downlink signal passes through duplexer 204 after amplification, is launched by external or built-in antenna.
Up direction, antenna receive the uplink signal that each terminal is sent, through duplexer 204 to low-noise amplifier 205
It amplifies.Gain control unit 206 realizes the automatic growth control of uplink signal, not to avoid each user terminal distance
Level differences caused by one guarantee that the carrier power for entering laser is constant.Combining and distribution unit 202 is by uplink main signal and monitoring
The monitoring return path signal combining that unit 207 is sent, mixed carrier are directly modulated into optical signal by laser 201, are returned by optical fiber
Reach small base station unit.It is communicated when it is implemented, monitoring unit 207 can be monitored with proximal end, controls distal power and radio frequency increases
Benefit obtains monitoring return path signal.
Power supply unit 208 completes input power conversion, provides required operating voltage for each active module embedded therein unit.
It is emphasized that embodiment of the present invention be it is illustrative, without being restrictive.Therefore present invention packet
Include and be not limited to embodiment described in specific embodiment, it is all by those skilled in the art according to the technique and scheme of the present invention
The other embodiments obtained, also belong to the scope of protection of the invention.
Claims (7)
1. a kind of distributed small base station system of light-carried wireless electricity, it is characterised in that：For more partition scenes of 5G communication system, packet
Small base station unit and ROF far-end unit are included, small base station unit is connect with ROF far-end unit using optical fiber, and simulation is carried on optical fiber
Modulated radio signal, the ROF indicate light-carried wireless electricity,
The small base station unit, for mutually turning between the modulation /demodulation of finishing service data, modulated signal and radiofrequency signal
Change and radiofrequency signal to simulated light mutual conversion；
The ROF far-end unit, for complete simulated light to radiofrequency signal mutual conversion and radiofrequency signal power amplification and
Transmission duplex.
2. the distributed small base station system of light-carried wireless electricity according to claim 1, it is characterised in that：The small base station unit packet
Include business interface and baseband processing unit (101), radio frequency front-end unit (102), analog laser (103) and monitoring unit
(104), business interface and baseband processing unit (101) connection radio frequency front-end unit (102), radio frequency front-end unit (102) connection
Analog laser (103), monitoring unit (104) connect business interface and baseband processing unit (101) and radio frequency front-end unit
(102)。
3. the distributed small base station system of light-carried wireless electricity according to claim 2, it is characterised in that：Small base station unit is worked
Journey is as follows,
Down direction, business interface and baseband processing unit (101) access service data, are handled by baseband modulation and demodulation, hair
It gives radio frequency front-end unit (102), radio frequency front-end unit (102) is analog signal by digital-to-analogue conversion signal, by up-conversion
And each laser (103) are issued after branch amplification；Monitoring unit (104) issues the long-range monitoring to ROF far-end unit simultaneously
Information is issued laser (103) by radio frequency front-end unit (102) and is sent out；
Up direction, laser (103) receives the upstream data from each ROF far-end unit, by radio frequency front-end unit
(102) revert to digital signal to business interface and baseband processing unit (103), demodulated, decode and frame decoding after, isolate
Monitoring back information gives monitoring unit (104), and master data is reduced into business datum passback by business interface.
4. the distributed small base station system of light-carried wireless electricity according to claim 1, it is characterised in that：The ROF far-end unit
Including analog laser (201), combining and distribution unit (202), power amplifier (203), duplexer (204), low-noise amplifier
(205), gain control unit (206) and monitoring unit (207), analog laser (201) connect combining and distribution unit (202), close
Branching unit (202) through power amplifier (203) connect duplexer (204), duplexer (204) through low-noise amplifier (205),
Gain control unit (206) connects combining and distribution unit (202).
5. the distributed small base station system of light-carried wireless electricity according to claim 4, it is characterised in that：The work of ROF far-end unit
Process is as follows,
Down direction, downlink signal is reverted to radio-frequency carrier by laser (201), and is filtered and separated by combining and distribution unit (202)
Traffic carrier and monitoring carrier wave out, wherein monitoring carrier wave, which gives monitoring unit (207), carries out dissection process, traffic carrier is through power
Amplifier (203), power amplifier (203) promote traffic carrier signal level, and output power grade is by monitoring unit (207)
It adjusts, realizes different covering demands；Downlink signal passes through duplexer (204) after amplification, is launched by external or built-in antenna
It goes；
Up direction, antenna receive the uplink signal that each terminal is sent, through duplexer (204) to low-noise amplifier (205)
It amplifies, gain control unit (206) realizes the gain control of uplink signal, and combining and distribution unit (202) is by uplink main signal
The monitoring return path signal combining sent with monitoring unit (207), mixed carrier are directly modulated into optical signal by laser (201),
Pass through fiber pass-back to small base station unit.
6. the according to claim 1 or 2 or 3 or 4 or 5 distributed small base station systems of light-carried wireless electricity, it is characterised in that：Small base
Unit of standing connects multiple ROF far-end units, forms Star Network.
7. the according to claim 1 or 2 or 3 or 4 or 5 distributed small base station systems of light-carried wireless electricity, it is characterised in that：ROF
The expanded simulated light interface of far-end unit cascades other ROF far-end units, forms chain network.
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| CN201810539751.9A CN108847891B (en) | 2018-05-30 | 2018-05-30 | Radio over fiber distributed small base station system |
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| CN201810539751.9A CN108847891B (en) | 2018-05-30 | 2018-05-30 | Radio over fiber distributed small base station system |
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| CN108847891B CN108847891B (en) | 2020-10-13 |
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| CN109687899A (en) * | 2019-01-16 | 2019-04-26 | 武汉虹信通信技术有限责任公司 | The method of satellite synchronous signal is transmitted on extended pattern scytoblastema station |
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| CN110620590A (en) * | 2019-08-14 | 2019-12-27 | 熊猫电子集团有限公司 | Serialized short-wave communication platform |
| CN111884723A (en) * | 2020-07-24 | 2020-11-03 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line component applied to uplink communication link |
| CN111884724A (en) * | 2020-07-24 | 2020-11-03 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line component applied to downlink communication link |
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| CN109687899A (en) * | 2019-01-16 | 2019-04-26 | 武汉虹信通信技术有限责任公司 | The method of satellite synchronous signal is transmitted on extended pattern scytoblastema station |
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| CN111884723A (en) * | 2020-07-24 | 2020-11-03 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line component applied to uplink communication link |
| CN111884724A (en) * | 2020-07-24 | 2020-11-03 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line component applied to downlink communication link |
| CN111884723B (en) * | 2020-07-24 | 2024-05-28 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line assembly applied to uplink communication link |
| CN111884724B (en) * | 2020-07-24 | 2024-05-28 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line assembly applied to downlink communication link |
| CN113747451A (en) * | 2021-09-03 | 2021-12-03 | 瑞斯康达科技发展股份有限公司 | Base station host, base station system and communication method |
| CN113747451B (en) * | 2021-09-03 | 2024-01-30 | 瑞斯康达科技发展股份有限公司 | Base station host, base station system and communication method |
| CN114302415A (en) * | 2021-12-29 | 2022-04-08 | 盐城浩方信息技术有限公司 | Expansion unit of expansion type pico-base station based on 5G VoNR network |
| WO2023124112A1 (en) * | 2021-12-31 | 2023-07-06 | 京信网络系统股份有限公司 | Base station and communication system |
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| CN108847891B (en) | 2020-10-13 |
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