CN106304420A - The wireless forward pass system transmitted towards the simulated light of 5G power sharing - Google Patents
The wireless forward pass system transmitted towards the simulated light of 5G power sharing Download PDFInfo
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- CN106304420A CN106304420A CN201610671101.0A CN201610671101A CN106304420A CN 106304420 A CN106304420 A CN 106304420A CN 201610671101 A CN201610671101 A CN 201610671101A CN 106304420 A CN106304420 A CN 106304420A
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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
- H04W88/085—Access point devices with remote components
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides the wireless forward pass system that a kind of simulated light towards 5G power sharing is transmitted, including: BBU pond, branched system optical fiber, distant-end node, distribution type fiber-optic, user terminal UE and RRU unit；BBU pond is connected to distant-end node by optical line terminal through branched system optical fiber, the outfan of distant-end node is connected to the input of distribution type fiber-optic, the outfan of distribution type fiber-optic connects RRU unit, and the outfan of RRU unit is sent to user terminal UE through eating dishes without rice or wine by antenna.The analogue signal modulated based on subcarrier is realized multiplexing in signal power dimension by the present invention, promotes the spectrum efficiency in future mobile communication system, increases transmission capacity.In addition, the present invention distinguishes different user data also by the size of superposed signal power, and select watt level to realize the multiplexing of power according to the distance of user distance base station processing unit, solve wireless terminal and access the systematic function lack of uniformity that the near-far interference of user brings.
Description
Technical field
The present invention relates to wireless communication technology field, in particular it relates to a kind of simulated light towards 5G power sharing is transmitted
Wireless forward pass system.
Background technology
Along with developing rapidly of communication technology, the continuous evolution of technical standard, forth generation mobile communication technology (4G) goes out
Existing so that it is data traffic transmission speed reaches per second 100,000,000 even gigabits, such that it is able to meet certain to a certain extent
Wide-band mobile communication application demand.But, along with intelligent terminal popularizes, applies and mobile new business demand sustainable growth,
Wireless transmission rate demand is exponentially increased, and the transfer rate of radio communication will still be difficult to meet the application of future mobile communications
Demand.Additionally, " the 5G vision with demand white paper " that propose according to 5G propelling group (IMT-2020) is described, following 5G wireless network
Being required to meet higher spectrum efficiency, faster access rate, bigger access capacity, wherein, spectrum efficiency to be compared
4G promotes 5～15 times.Meanwhile, along with being continuously increased of speed and capacity, wireless access network (RAN, Radio access
Network) critical asset depended on for existence as mobile operator, is faced with unprecedented challenge: 1) by strengthening sky
Middle interface capability promotes the mode of RAN access capability, brings high energy consumption；2) high RAN capital expenditures (CAPEX,
Capital Expenditure) and operation cost (OPEX, Operating Expense)；3) tidal effect of customer service,
Cause low base station utilization rate；4) access flow of user and the income amplification of operator are the most disproportionate.Researching and developing
5G mobile communication is expired by features such as higher spectrum efficiency, more frequency spectrum resource and more dense cell deployment especially
The demand that foot mobile service flow increases.Therefore, based on above-mentioned lot of challenges, future mobile communication system needs to introduce novel
Wireless access network framework promotes the competitiveness of network.
Merge the wireless access network C-of 4C (Clean, Centralized, Cooperative and Cloud) feature
RAN, is on the basis of distributed base station, is focused on by base band, the radiotechnics that cooperates and base based on cloud computing
Infrastructure, it is achieved network resources locating and dynamic load leveling.This technology is provided that bigger, more flexible bandwidth accesses and supports
More operation standards, are not only the main flow access scheme in current LTE epoch, and the access network framework meeting 5G mobile communication are sent out
Exhibition trend.C-RAN is handled by the base station unit (Baseband Processing Unit, BBU), Remote Radio Unit (Radio
Remote unit, RRU) and BBU and RRU between Transmission Fibers link composition.Wherein, RRU is downwards for eating dishes without rice or wine, and BBU is upwards
Network Side Interface, between BBU and RRU, the signal of transmission is based on common public radio interface (Common Public Radio
Interface, CPRI) digital baseband signal.In C-RAN system, the most wireless by data transmission between RRU to BBU
Forward pass (fronthaul), and the data having conventional macro base station or small cell to access are passback (backhaul).At C-
Under RAN framework, wireless access is primarily referred to as fronthaul (wireless forward pass).At present, towards the wireless forward pass loading side of C-RAN
Formula mainly has optical fiber directly to drive, optical transfer network (Optical transport network, OTN) and EPON (Passive
Optical access network, PON) system etc..Wherein, more fiber resource need to be taken based on the optical fiber directly scheme of driving,
Build higher with maintenance cost and difficulty；Though fiber resource can be saved based on OTN scheme, but system equipment price is higher and is difficult to
Meet the forward data requirement to frequency jitter；Scheme based on PON, the fiber optic network of reusable existing PON system, save light
Fine resource reduces Radio Access Network upgrade cost.
Therefore, for 5G access network, how by Optical Access Network system, real efficiently by optical fiber transmission technique
Now access data transmission, i.e. realized the wireless forward pass of two-forty, Large Copacity, high spectrum efficiency by existing fiber access network system
The transmission of data, is one of focus and the difficult point of current research.Existing literature search finds, current relevant based on Optical Access Network
Wireless forward pass system mainly from numeral and simulation two in terms of launch, and use various different technologies promote system capacity and
Transfer rate.Such as, Xiang Liu, Huaiyu Zeng et al. (Asia in Asia-Pacific optic communication meeting in 2015
Communications and Photonics Conference, ACP) deliver " Bandwidth-Efficient Mobile
Fronthaul Transmission for Future 5G Wireless Networks " paper, propose to use simulation pair to carry
Ripple modulation technique, is modulated on different subcarriers the convergence obtaining transmission data, thus realizes wireless access by signal
The increase of speed.But, scheme essence based on subcarrier modulation technique is exactly channeling, needs by expanding frequency resource
Realize the increase of access system capacity.It addition, increase along with system converges number of carrier wave, i.e. need the band of transmission of analogue signal
Wide increase, this will increase the linearity of the photoelectric device in optical access network system to a certain extent, thus increase because of system
Dilatation and bring cost to roll up.
Summary of the invention
For defect of the prior art, it is an object of the invention to provide a kind of simulated light towards 5G power sharing and transmit
Wireless forward pass system.
The wireless forward pass system that the simulated light towards 5G power sharing provided according to the present invention is transmitted, including: BBU pond,
Branched system optical fiber, distant-end node, distribution type fiber-optic, several user terminals UE and several Remote Radio Unit, the most some
Individual RRU unit；Wherein:
Described BBU pond is connected to distant-end node by optical line terminal through branched system optical fiber, and the outfan of distant-end node is even
Being connected to the input of distribution type fiber-optic, the outfan of distribution type fiber-optic connects RRU unit, and the outfan of described RRU unit passes through
Antenna sends to user terminal UE through eating dishes without rice or wine.
Preferably, described BBU pond includes: M BBU unit and first wave division multiplexer, the outfan warp of M BBU unit
First wave division multiplexer is connected to the input of branched system optical fiber；Wherein the value of M depend primarily on the wired of system access and
The number of wireless user data, the value of M is the natural number more than 1, including 4,8,16,32,64,128,256,512 or 1024；
Described BBU unit, i.e. baseband processing unit, including: electrical domain power sharing module, electric amplifier and photomodulator
Module；The outfan of described electrical domain power sharing module is connected to the input of electric amplifier, for realizing putting of subscriber signal
Greatly；The output of described electric amplifier is connected to the input of optical modulator module, is used for driving optical modulator module；Photomodulator
The outfan of module is connected to first wave division multiplexer, for realizing the modulation of optical signal.
Preferably, described distant-end node is: light branch combiner, for realizing the distribution of down user data.
Preferably, described RRU unit includes: optical filter, photoelectric conversion module, power amplifier and antenna；Distribution
The signal that formula optical fiber sends sequentially passes through after optical filter, photoelectric conversion module, power amplifier through antenna transmission to user
Terminal UE；Wherein:
Described optical filter is filtered processing for the signal sending distribution type fiber-optic；
Described photoelectric conversion module is for being converted into the corresponding signal of telecommunication by the optical signal processed after filtering；
Described power amplifier transmits to antenna after being amplified by the signal of telecommunication.
Preferably, described user terminal UE is for being demodulated the power sharing signal received；Specifically, according to
Signal is transmitted by the BBU pond transmitting power different from the different employings of the spacing of user terminal UE；
Distance being more than or equal to the user terminal UE setting threshold value, the signal that antenna receives is carried out after first passing through down coversion
Signal estimation and equilibrium treatment, send after the signal of Signal estimation Yu equilibrium treatment is demodulated by signal demodulation module
To user；
Distance being less than to the user terminal UE setting threshold value, the signal that antenna receives first passes through down coversion, after down coversion
A part of signal carry out Signal estimation and equilibrium treatment, through the signal of Signal estimation and equilibrium treatment by signal solution mode transfer
Block sends the acquiring unit of the high power distributing user to this power sharing signal after being demodulated, thus obtains high power and use
User data；After high power user data is by being multiplied with the frequency domain data of channel response, then believe with the another part after down coversion
Number being connected to subtracter block together thus obtain the baseband modulation signal of low-power user, described baseband modulation signal carries out letter
Number estimate and equilibrium treatment, be sent to use after the signal transmission of Signal estimation and equilibrium treatment is demodulated to demodulation module
Family.
Preferably, described electrical domain power sharing module includes: the distribution of N number of subscriber signal generation module, multiplier, power is single
Unit and adder, N therein is the natural number more than or equal to 1；The outfan of described subscriber signal generation module, power distribute
The outfan of unit is connected to the input of multiplier, and the outfan of multiplier is connected to the input of adder, adder
Outfan constitute described electrical domain power sharing module outfan, be used for exporting electrical domain power sharing signal；User therein
Signal generator module is for producing the down user data of base band, and power distributing unit is for realizing the power of down user data
Adjust.
Preferably, also include that user data generation module, described user data generation module are used for producing downlink user number
The number of it is believed that；Described down user data signal is to meet the waveshape signal that future mobile communications is eated dishes without rice or wine, including: OFDM
Signal, filtered orthogonal frequency-division multiplex singal, the orthogonal frequency-division multiplex singal based on filtering group of non-unification, based on wave filter
Any one in the orthogonal frequency-division multiplex singal of group.
Preferably, described optical modulator module includes: Distributed Feedback Laser, MYG laser instrument, VCSEL laser instrument, DBR laser
Any one form that device or laser instrument add external modulator or laser instrument adds in manipulator；Described external modulator includes: horse
Conspicuous zehnder modulators, electroluminescent Absorption modulation device.
Preferably, described first wave division multiplexer is to have conjunction road, the wavelength division multiplex device of branch function, including: array
Waveguide optical grating.
Preferably, described photoelectric conversion module includes: any one in photodiode PIN, avalanche diode APD.
Compared with prior art, the present invention has a following beneficial effect:
1, the present invention uses power sharing technology, in the multiplexing dimension of power boost system, on the one hand can use same
Individual wavelength carries the data message of many times；On the other hand, multiple subcarrier multiplexings when can preferably overcome mass data transfers
The simulation subband interference problem brought.
2, the present invention utilizes the photoelectric device of low modulation bandwidth to realize the transfer rate of two-forty, can reduce to a certain extent
The Cost Problems of system in future capacity upgrading.
3, the present invention makes full use of the multiplex technique of power domain, can improve system spectral efficiency, increase forward pass system transfers appearance
Amount.
Accompanying drawing explanation
By the detailed description non-limiting example made with reference to the following drawings of reading, the further feature of the present invention,
Purpose and advantage will become more apparent upon:
Fig. 1 is the detailed of the analog optical transmission system based on power sharing in 5G wireless forward pass network of the present invention
Schematic diagram；
Fig. 2 is the comparison diagram of the planisphere of high-low power user；Fig. 2 (a) is the planisphere of low-power user, and Fig. 2 (b) is
The planisphere of high power user；
Fig. 3 is the signal after power sharing after up-conversion.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in the technology of this area
Personnel are further appreciated by the present invention, but limit the present invention the most in any form.It should be pointed out that, the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, it is also possible to make some changes and improvements.These broadly fall into the present invention
Protection domain.
The wireless forward pass system that the simulated light towards 5G power sharing provided according to the present invention is transmitted, including: BBU (base
Tape handling unit) pond, branched system optical fiber, distant-end node, some distribution type fiber-optics, some Remote Radio Unit (referring to RRU) unit,
Several user terminals (UE), wherein, BBU pond is connected to distant-end node by optical line terminal through branched system optical fiber, and far-end saves
The output of point is connected to distribution type fiber-optic, and distribution type fiber-optic outfan connects RRU unit, and the output of RRU unit is by antenna warp
Cross and eat dishes without rice or wine to send to UE, thus realize the distribution of downlink data；
Described BBU pond, it is characterised in that be made up of M BBU unit and first wave division multiplexer, wherein, M BBU is mono-
Being connected to first wave division multiplexer after the data output of unit, the first Wavelength division multiplexing module is connected to branched system optical fiber；
Described BBU unit, it is characterised in that by electrical domain power sharing module, electric amplifier and optical modulator module structure
Become；Wherein, the output of electrical domain power sharing module is connected to electric amplifier, it is achieved the amplification of subscriber signal, electric amplifier defeated
Go out to be connected to optical modulator module, be used for driving optical modulator module；It is multiple that the output of optical modulator module is connected to the first wavelength-division
Use device；
Described distant-end node, it is characterised in that be capable of the distribution of down user data；By light branch combiner
(splitter) constitute；
Described RRU unit, it is characterised in that the reception of main down user data；Mainly include, optical filter, light
Electricity modular converter, power amplifier, antenna；Distribution type fiber-optic is to the data signal of up to subscriber unit, first by distribution type fiber-optic
Output is connected to optical filter, and the output of optical filter is connected to photoelectric conversion module, photoelectric conversion module output be connected to
Power amplifier, the output of power amplifier is connected to antenna, thus realizes the distribution of downlink data；
Described user terminal UE, it is characterised in that mainly complete the demodulation of power sharing signal；Believe according to power sharing
Number produce volume, use different transmitting power (to adjust the distance and compare user for being positioned at the UE user of BBU Chi Butongjulichu
Use high transmitting power, for using low transmitting power apart from closer user), therefore the user of different capacity is come
The receiver module saying its UE end is different.1) for distant user, the signal that antenna receives first passes through lower change
After Pin, entrance Signal estimation is with equilibrium, and Signal estimation is connected to signal demodulation module, the output of signal demodulation with equilibrium output
Arrive the acquisition of user data, thus realize the reception of user data；2) for user close together, antenna receives
Signal is connected to down coversion, and the signal part after down coversion is connected to the channel estimation and equalization of this user side, Signal estimation
Output with equalizing signal is connected to signal demodulation, signal the output demodulated is connected to the high power in this power sharing signal
The acquiring unit of distributing user, thus obtain high power user data；High power user data by with channel response at frequency domain
After content is multiplied, it is connected to subtracter block together with another part of down coversion output, obtains the base of this low-power user
Band modulated signal, this signal is then connected to Signal estimation with equilibrium, and Signal estimation is connected to signal solution mode transfer with equilibrium output
Block, the output of signal demodulation arrives the acquisition of user data, thus realizes the reception of user data；
Described electrical domain power sharing module, be mainly used in by be sent to the data of different subscriber units in the identical time and
Realize the superposition in power domain in identical frequency, i.e. distinguish user by different power.Wherein, including N number of user
The distribution of signal generator module, multiplier, power and adder, wherein, subscriber signal generation module is for producing the descending of base band
User data, its output connection enters multiplication module together with power distributing unit, it is achieved the power of subscriber signal adjusts；No
It is connected to adder Module with user data through the output of respective multiplier, thus forms electrical domain power sharing signal；
Described user data generation module, is mainly used to the generation of down user data signal, and its signal produced is simulation
Multicarrier modulated signal, can be orthogonal frequency-division multiplex singal, it is also possible to for the orthogonal frequency-division multiplex singal of filtering, it is also possible to for
The orthogonal frequency-division multiplex singal based on filtering group of non-unification, the orthogonal frequency-division multiplex singal etc. that also may be based on bank of filters accords with
Close the waveshape signal that future mobile communications is eated dishes without rice or wine；
Described optical modulator module, can be to have directly modulation laser instrument to constitute, such as DFB, MYG, VCSEL or DBR；Or
Adding external modulator for laser instrument to constitute, wherein external modulator can be Mach zehnder modulators, electroluminescent Absorption modulation device etc.；Or
Laser instrument adds the combination of manipulator, such as EML；
Described first wave division multiplexer, can be array waveguide grating, it is also possible to has for other and closes road, branch function
Wavelength division multiplex device；
Described photoelectric conversion module, can be photodiode PIN, it is also possible to for avalanche diode APD；
M mentioned above takes 4,8,16,32,64,128,256,512 or 1024, and its occurrence depends primarily on system
Wired and the number of wireless user data accessed；
N value mentioned above takes 2,3 ... waiting the natural number arbitrarily more than or equal to 2, its occurrence depends primarily on distribution
The data volume of user.
Below in conjunction with specific embodiment, the present invention done more detailed explanation.
As it is shown in figure 1, the present embodiment includes: mainly by BBU (baseband processing unit) pond, branched system optical fiber, distant-end node,
Some distribution type fiber-optics, some Remote Radio Unit (referring to RRU) unit, several user terminals (UE)；Wherein, BBU pond is passed through
Optical line terminal is connected to distant-end node through branched system optical fiber, and the output of distant-end node is connected to distribution type fiber-optic, distributed light
Fine outfan connects RRU unit, and the output of RRU unit is sent to UE through eating dishes without rice or wine by antenna, thus realizes downlink data
Distribution.Describing for ease of analyzing, we are carried out with two subscriber unit data instances with corresponding in a BBU unit in this figure
Illustrate, i.e. M=1, N=2.
The basic structure in BBU pond is as it is shown in figure 1, include M BBU unit and first wave division multiplexer, wherein, and M=1
Being connected to first wave division multiplexer after the data output of BBU unit, the first Wavelength division multiplexing module is connected to branched system optical fiber；
BBU cellular construction is as it is shown in figure 1, be made up of electrical domain power sharing module, electric amplifier and optical modulator module；Its
In, the output of electrical domain power sharing module is connected to electric amplifier, it is achieved the amplification of subscriber signal, and the output of electric amplifier connects
To optical modulator module, it is used for driving optical modulator module；The output of optical modulator module is connected to first wave division multiplexer；
As it is shown in figure 1, electrical domain power sharing module, it is mainly used in realizing in power domain the data being sent to UE1 and UE2
On superposition, i.e. distinguish user by different power.Including: subscriber signal 1 generation module, subscriber signal 2 generation module,
The distribution of multiplier 1, multiplier 2, power and adder, wherein, subscriber signal 1 generation module and subscriber signal 2 generation module with
The power gain of its power distribution module distribution respectively enters multiplier 1 and multiplier 2 together, and two multiplier output signals are defeated
Go out and be connected to adder Module, thus form descending electrical domain power sharing signal；
Distant-end node, by light branch combiner (splitter) constitute；
RRU unit, as it is shown in figure 1, include, optical filter, photoelectric conversion module, power amplifier, antenna 1；Distributed
Optical fiber, to the data signal of up to subscriber unit 1 and 2, is first connected to optical filter by distribution type fiber-optic output, optical filter
Output is connected to photoelectric conversion module, photoelectric conversion module output be connected to power amplifier, and the output of power amplifier is even
It is connected to antenna 1, thus realizes the distribution of downlink data；
User terminal UE1, as it is shown in figure 1, include, antenna 1,1, down coversion, Signal estimation (estimate channel with balance module
For H1), signal demodulation module 1, user 1 signal acquisition；The power sharing signal of reception is sent to down-converter unit by antenna 1,1
Realizing the lower conversion of signal, the output of down coversion arrives channel estimation and equalization, and the output after channel estimation and equalization enters letter
Number demodulation module 1, signal demodulation module 1 be connected to user 1 signal acquisition, thus realize the reception of UE1 data after exporting；
User terminal UE2, as it is shown in figure 1, include: antenna 1,2, down coversion, the first Signal estimation and the most very H1,2, signal
Demodulation module 2, user 1 signal acquisition, subtractor 1, channel H1,2 estimate with the module that is multiplied of user 1 data, secondary signal with
The most very H1,2, the demodulation of user 2 signal and acquisition；Wherein, antenna 1, the power sharing signal of reception is sent to down coversion list by 2
Unit realizes the lower conversion of signal, and the output of down coversion arrives channel estimation and equalization (estimations channel is H1,2), channel estimate and
Output entering signal demodulation module 1 after equilibrium, signal demodulation module 1 be connected to user 1 signal acquisition after exporting；User 1
Signal enters subtraction after channel H1,2 is multiplied module with user data together with the signal of the down coversion after antenna 1,2 reception
1, thus remove user 1 signal data；The output signal of subtractor enters with channel estimation and equalization (estimation channel is H1,2)
The demodulation of user 2 signal and acquisition module, thus realize the reception of user 2 data；
Wherein, optical modulator module, can be to have directly modulation laser instrument to constitute, such as DFB, MYG, VCSEL or DBR；Or
Person adds external modulator for laser instrument and constitutes, and wherein external modulator can be Mach zehnder modulators, electroluminescent Absorption modulation device etc.；Or
Person's laser instrument adds the combination of manipulator, such as EML；
Wherein, first wave division multiplexer, can be array waveguide grating, it is also possible to have conjunction road, branch function for other
Wavelength division multiplex device；
Wherein, photoelectric conversion module, can be photodiode PIN, it is also possible to for avalanche diode APD；
Wherein, above-mentioned M takes 4,8,16,32,64,128,256,512 or 1024, and its occurrence depends primarily on system
Wired and the number of wireless user data accessed；
Wherein, above-mentioned N value takes 2,3 ... waiting the natural number arbitrarily more than or equal to 2, its occurrence depends primarily on point
The data volume at hair family.
Further, the planisphere of low-power user and high power user is respectively as shown in Fig. 2 (a) and Fig. 2 (b).
Frequency-domain waveform after the up-conversion of power sharing signal is as shown in Figure 3.
The present embodiment proposes the wireless forward pass system of the simulated light transmission towards 5G power sharing, it is provided that a kind of for base
In light and the high power capacity of wireless forward pass transmission, big speed, the analog optical transmission system of high spectrum efficiency.The present invention uses power sharing
Technology, in the multiplexing dimension of power boost system, on the one hand can use same wavelength to the data message carrying many times；Separately
On the one hand, the simulation subband interference problem that when can preferably overcome mass data transfers, multiple subcarrier multiplexings bring.These are excellent
The forward pass system that point can make the present invention propose obtains: 1) utilize the photoelectric device of low modulation bandwidth to realize the transmission speed of two-forty
Rate, can reduce the Cost Problems of system in future capacity upgrading to a certain extent；2) make full use of the multiplex technique of power domain, can carry
High system spectral efficiency, increase forward pass system transmission capacity.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or revise, this not shadow
Ring the flesh and blood of the present invention.In the case of not conflicting, the feature in embodiments herein and embodiment can any phase
Combination mutually.
Claims (10)
1. the wireless forward pass system that the simulated light towards 5G power sharing is transmitted, it is characterised in that including: BBU pond, feeder line
Formula optical fiber, distant-end node, distribution type fiber-optic, several user terminals UE and several Remote Radio Unit, i.e. several RRU
Unit；Wherein:
Described BBU pond is connected to distant-end node by optical line terminal through branched system optical fiber, and the outfan of distant-end node is connected to
The input of distribution type fiber-optic, the outfan of distribution type fiber-optic connects RRU unit, and the outfan of described RRU unit passes through antenna
Send to user terminal UE through eating dishes without rice or wine.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 1 is transmitted, it is characterised in that
Described BBU pond includes: M BBU unit and first wave division multiplexer, and the outfan of M BBU unit is through first wave division multiplexer even
It is connected to the input of branched system optical fiber；Wherein the value of M depend primarily on the wired of system access and wireless user data
Number, the value of M is the natural number more than 1, including 4,8,16,32,64,128,256,512 or 1024；
Described BBU unit, i.e. baseband processing unit, including: electrical domain power sharing module, electric amplifier and photomodulator mould
Block；The outfan of described electrical domain power sharing module is connected to the input of electric amplifier, for realizing the amplification of subscriber signal；
The output of described electric amplifier is connected to the input of optical modulator module, is used for driving optical modulator module；Photomodulator mould
The outfan of block is connected to first wave division multiplexer, for realizing the modulation of optical signal.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 1 is transmitted, it is characterised in that
Described distant-end node is: light branch combiner, for realizing the distribution of down user data.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 1 is transmitted, it is characterised in that
Described RRU unit includes: optical filter, photoelectric conversion module, power amplifier and antenna；The signal that distribution type fiber-optic sends
Sequentially pass through after optical filter, photoelectric conversion module, power amplifier through antenna transmission to user terminal UE；Wherein:
Described optical filter is filtered processing for the signal sending distribution type fiber-optic；
Described photoelectric conversion module is for being converted into the corresponding signal of telecommunication by the optical signal processed after filtering；
Described power amplifier transmits to antenna after being amplified by the signal of telecommunication.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 1 is transmitted, it is characterised in that
Described user terminal UE is for being demodulated the power sharing signal received；Specifically, according to BBU pond and user terminal UE
Spacing difference use different transmitting power signal is transmitted；
Distance being more than or equal to the user terminal UE setting threshold value, the signal that antenna receives carries out signal after first passing through down coversion
Estimate and equilibrium treatment, be sent to use after the signal of Signal estimation Yu equilibrium treatment is demodulated by signal demodulation module
Family；
Distance being less than to the user terminal UE setting threshold value, the signal that antenna receives first passes through down coversion, after down coversion
Part signal carries out Signal estimation and equilibrium treatment, and the signal through Signal estimation with equilibrium treatment is entered by signal demodulation module
The acquiring unit of the high power distributing user sent to this power sharing signal after row demodulation, thus obtain high power number of users
According to；After high power user data is by being multiplied with the frequency domain data of channel response, then with down coversion after another part signal one
Rising and be connected to subtracter block thus obtain the baseband modulation signal of low-power user, described baseband modulation signal carries out signal and estimates
Meter and equilibrium treatment, be sent to user after the signal transmission of Signal estimation with equilibrium treatment is demodulated to demodulation module.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 2 is transmitted, it is characterised in that
Described electrical domain power sharing module includes: N number of subscriber signal generation module, multiplier, power distributing unit and adder, its
In N be the natural number more than or equal to 1；The outfan of described subscriber signal generation module, power distributing unit outfan equal
Being connected to the input of multiplier, the outfan of multiplier is connected to the input of adder, and the outfan of adder constitutes institute
State the outfan of electrical domain power sharing module, be used for exporting electrical domain power sharing signal；Subscriber signal generation module therein is used
In the down user data of generation base band, power distributing unit adjusts for the power realizing down user data.
7. the wireless forward pass system transmitted according to the simulated light towards 5G power sharing described in any one of claim 1 to 6, its
It is characterised by, also includes that user data generation module, described user data generation module are used for producing down user data signal；
Described down user data signal is to meet the waveshape signal that future mobile communications is eated dishes without rice or wine, including: orthogonal frequency-division multiplex singal, warp
The orthogonal frequency-division multiplex singal of filtering, the orthogonal frequency-division multiplex singal based on filtering group of non-unification, based on bank of filters just
Hand over any one in frequency-division multiplex singal.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 2 is transmitted, it is characterised in that
Described optical modulator module includes: outside Distributed Feedback Laser, MYG laser instrument, VCSEL laser instrument, DBR laser or laser instrument add
Manipulator or laser instrument add any one form in manipulator；Described external modulator includes: Mach zehnder modulators, electroluminescent
Absorption modulation device.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 2 is transmitted, it is characterised in that
Described first wave division multiplexer is to have conjunction road, the wavelength division multiplex device of branch function, including: array waveguide grating.
The wireless forward pass system that simulated light towards 5G power sharing the most according to claim 4 is transmitted, its feature exists
In, described photoelectric conversion module includes: any one in photodiode PIN, avalanche diode APD.
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