CN106230509A - A kind of method and system utilizing ten thousand mbit ethernet transmission wireless signals - Google Patents
A kind of method and system utilizing ten thousand mbit ethernet transmission wireless signals Download PDFInfo
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- CN106230509A CN106230509A CN201610651751.9A CN201610651751A CN106230509A CN 106230509 A CN106230509 A CN 106230509A CN 201610651751 A CN201610651751 A CN 201610651751A CN 106230509 A CN106230509 A CN 106230509A
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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
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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
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
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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
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
- H04B10/25759—Details of the reception of RF signal or the optical conversion before the optical fibre
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of method and system utilizing ten thousand mbit ethernet transmission wireless signals.Method includes that S1, MU will be converted to baseband signal from the radiofrequency signal of base stations couple, and then composition CPRI frame passes to EU end by optical fiber；The CPRI frame received is packaged into ten thousand mbit ethernet frames by S2, EU, through 10,000,000,000 PHY chip and network cable transmission to RU end；The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame by S3, RU, then solve CPRI frame and obtain baseband signal, are then converted into radiofrequency signal output.Described system includes MU, EU and RU, and a MU can connect multiple EU equipment, and an EU can connect multiple RU equipment.The present invention carries out transmission and the wireless coverage of 2G/3G/4G wireless signal using ten thousand mbit ethernets as transmission medium, it is achieved that wireless signal transmission in ten thousand mbit ethernets, is realized the covering of wireless signal multi-standard, vast capacity by ten thousand mbit ethernet transmission.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of utilize ten thousand mbit ethernets transmission wireless signals method and
System.
Background technology
In the rear 4G epoch, three big operators' " range " cover and are basically completed, and have been directed towards " degree of depth and thickness " covering and send out
Exhibition, the input that the following indoor LTE degree of depth covers will continue to increase.But conventional chamber offshoot program exists, and design is complicated, property is coordinated,
Construction and the shortcoming of later maintenance difficulty, therefore conventional chamber offshoot program progressively certainly will be divided replacement by New Active room.And novel have
Source chamber divides how to solve the problem that tradition indoor distributed system exists, and is the key of traction technique evolution.Along with an iron rake with three to six teeth company
Establishment, new indoor distribution of products will towards multi-frequency multi-mode, intellectuality, miniaturization development, this be accomplished by transmit matchmaker
It is situated between and can support faster speed, higher bandwidth, and more easily construct.
Traditional 100,000,000 and gigabit transmission bandwidth can not meet demand, and ten thousand mbit ethernets are with its higher bandwidth
(10G) with farther transmission range (longer transmission distance is up to 40 kilometers), novel room offshoot program can be better met to band
The wide demand with transmission range.It addition, ten thousand mbit ethernet technology have followed Ethernet, Fast Ethernet and gigabit Ethernet skill
Art, therefore all occupies great introduction advantage in user's popularity rate, ease of use, network interoperability and simplification.And
Netting twine, with its portable feature of constructing, is deeply liked by client, can be met the demand of more convenient construction.Therefore, by 10,000,000,000 with
Too net electricity port transmission technology is applied in wireless transmitting system is extremely important, the most meaningful and value.
Summary of the invention
The technical problem to be solved be to provide a kind of utilize ten thousand mbit ethernets transmission wireless signals method and
System, carries out transmission and the wireless coverage of 2G/3G/4G wireless signal using ten thousand mbit ethernets as transmission medium, and the present invention uses
Netting twine connects up, and short construction period, property are coordinated easily, later stage system maintenance is simple, it is possible to fast and effeciently strengthen wireless
The in-door covering of signal also improves the network bandwidth.
A kind of method utilizing ten thousand mbit ethernet transmission wireless signals, during downlink, said method comprising the steps of:
Step S1, MU are converted to baseband signal by processing from the radiofrequency signal of base stations couple, and then composition CPRI frame, passes through optical fiber
Pass to EU end；
The CPRI frame received is packaged into ten thousand mbit ethernet frames by step S2, EU, through 10,000,000,000 PHY chip and network cable transmission to RU
End；
The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame by step S3, RU, then solve CPRI frame and obtain baseband signal, then locate
Reason is converted into radiofrequency signal output, it is achieved the multi-standard of wireless signal, the covering of vast capacity.
Wherein, in the FPGA of MU Yu EU, the high speed serialization deserializer core of example 10Gbps speed, passes through between MU and EU
Laser instrument and the optical fiber of 10Gbps communicate；
The Ethernet core of example 10Gbps speed, the PHY chip of exterior arrangement 10Gbps speed, EU and RU in the FPGA of EU Yu RU
Between communicated with ten thousand mbit ethernet agreements by netting twine.
Wherein, during downlink, described step S1, particularly as follows:
Radiofrequency signal is converted to baseband signal through DDC resume module by MU, then according to CPRI protocol frame structure composition
Then parallel CPRI frame data are changed by the CPRI frame of 10Gbps speed through the high speed serialization deserializer consideration convey of 10Gbps speed
Become the high-speed serial signals of 10Gbps speed, pass to EU end by laser instrument and optical fiber；
Described step S2, particularly as follows:
The high speed serialization of 10Gbps speed that EU will be received by the high speed serialization deserializer core of laser instrument and 10Gbps speed
Signal is converted into parallel CPRI frame data, and then data add frame head and the postamble of ten thousand mbit ethernets, be packaged into 10,000,000,000 with
Become serial signal to be at a high speed sent to 10,000,000,000 PHY chip by XGMII interface conversion after net frame very much, afterwards by RJ45 interface and
Network cable transmission is to RU end；
Described step S3, particularly as follows:
RU becomes 10,000,000,000 through XGMII interface conversion after receiving ten thousand mbit ethernet signals by RJ45 interface and 10,000,000,000 PHY chip
Ethernet frame, then removes frame head and the postamble of ten thousand mbit ethernets, is reduced into the CPRI frame of 10Gbps speed, then solves CPRI frame and obtain
To baseband signal, then baseband signal is converted into radiofrequency signal after DUC resume module, is launched by the antenna of RU
Go, it is achieved the covering of wireless signal.
Wherein, in order to ensure the stable and reliable of system, all EU and RU work clocks all recover from MU, particularly as follows:
MU inserts an ID numbering, EU and RU on downlink during CPRI framing in a certain fixed position of CPRI frame
Judge whether from this interface recovered clock by the scope of detection ID numbering, this ensure that the stable of system clock with can
Lean on.
A kind of system using the described above method utilizing ten thousand mbit ethernet transmission wireless signals, including near-end main frame
Access unit (MU), expanding element (EU) and far-end extension unit (RU), a MU can connect multiple EU equipment, and an EU is permissible
Connect multiple RU equipment；
Described MU, changes into baseband signal by the radiofrequency signal of base stations couple when downlink, then composition CPRI frame, logical
Cross fiber-optic transfer to EU end；
Described EU, is packaged into ten thousand mbit ethernet frames by the CPRI frame received when downlink, through 10,000,000,000 PHY chip and
Network cable transmission is to RU end；
The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame when downlink by described RU, then solve CPRI frame and obtain base
Band signal, is then processed after being converted into radiofrequency signal, is exported by antenna.
Wherein, MU mainly realizes the conversion between radiofrequency signal and optical signal, including DDC/DUC module, CPRI interface mould
Block and SERDES interface module；
EU mainly realizes the conversion between optical signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface module
With SERDES interface module；
RU mainly realizes the conversion between radiofrequency signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface mould
Block and DDC/DUC module.
A kind of method utilizing ten thousand mbit ethernet transmission wireless signals, during up-link, said method comprising the steps of:
The radiofrequency signal of reception is processed and is converted to baseband signal by step S1, RU, then according to CPRI protocol frame structure composition
CPRI frame, and be packaged into further after ten thousand mbit ethernet frames through 10,000,000,000 PHY chip and network cable transmission to EU end；
The ten thousand mbit ethernet frames received are reduced into CPRI frame by step S2, EU, and CPRI frame carries out solving frame process and obtain base
Band signal, carries out summation process, afterwards then by the baseband signal after summation according to CPRI by the baseband signal from multichannel RU
Parallel CPRI frame data are converted into high-speed serial signals, by laser instrument and light by protocol frame structure composition CPRI frame afterwards
Fibre is transferred to MU end；
The high-speed serial signals received is converted into parallel CPRI frame data by step S3, MU, and carries out CPRI frame solving frame
Process obtains baseband signal, afterwards the baseband signal from multichannel EU is carried out summation process, at the baseband signal after summation
Radio signal transmission is converted to base station after reason.
Wherein, in the FPGA of MU Yu EU, the high speed serialization deserializer core of example 10Gbps speed, passes through between MU and EU
Laser instrument and the optical fiber of 10Gbps communicate；
The Ethernet core of example 10Gbps speed, the PHY chip of exterior arrangement 10Gbps speed, EU and RU in the FPGA of EU Yu RU
Between communicated with ten thousand mbit ethernet agreements by netting twine.
Wherein, during up-link, described step S1, particularly as follows:
The radiofrequency signal received by antenna is converted to baseband signal after DDC resume module by RU, then according to CPRI
Then data are added frame head and the postamble of ten thousand mbit ethernets, are packaged into by the CPRI frame of protocol frame structure composition 10Gbps speed
Become serial signal to be at a high speed sent to 10,000,000,000 PHY chip by XGMII interface conversion after ten thousand mbit ethernet frames, pass through RJ45 afterwards
Interface and network cable transmission are to EU end；
Described step S2, particularly as follows:
EU becomes 10,000,000,000 through XGMII interface conversion after receiving ten thousand mbit ethernet signals by RJ45 interface and 10,000,000,000 PHY chip
Ethernet frame, then removes frame head and the postamble of ten thousand mbit ethernets, is reduced into the CPRI frame of 10Gbps speed, and is entered by CPRI frame
Row solves frame process and obtains baseband signal, the baseband signal from multichannel RU carries out summation process afterwards, after then suing for peace
Parallel CPRI frame data, according to the CPRI frame of CPRI protocol frame structure composition 10Gbps speed, are passed through by baseband signal afterwards
The high speed serialization deserializer consideration convey of 10Gbps speed changes the high-speed serial signals of 10Gbps speed into, is passed by laser instrument and optical fiber
It is passed to MU end；
Described step S3, particularly as follows:
The high speed serialization of 10Gbps speed that MU will be received by the high speed serialization deserializer core of laser instrument and 10Gbps speed
Signal is converted into parallel CPRI frame data, and CPRI frame carries out solving frame processes and obtain baseband signal, afterwards will be from multichannel
The baseband signal of EU carries out summation process, the baseband signal after summation is converted to after DUC resume module radiofrequency signal and passes
It is passed to base station.
A kind of system using the described above method utilizing ten thousand mbit ethernet transmission wireless signals, is characterized in that: bag
Including near-end main frame access unit (MU), expanding element (EU) and far-end extension unit (RU), a MU can connect multiple EU equipment,
One EU can connect multiple RU equipment；
Described RU, processes the radiofrequency signal of reception when up-link and is converted to baseband signal, then according to CPRI agreement
Frame structure composition CPRI frame, and be packaged into further after ten thousand mbit ethernet frames through 10,000,000,000 PHY chip and network cable transmission to EU end；
The ten thousand mbit ethernet frames received are reduced into CPRI frame when up-link by described EU, and by CPRI frame Xie Zhengchu
Reason obtains baseband signal, the baseband signal from multichannel RU carries out summation process afterwards, then by the baseband signal after summation
Form CPRI frame according to CPRI protocol frame structure, afterwards parallel CPRI frame data are converted into high-speed serial signals, by swashing
Light device and fiber-optic transfer are to MU end；
Described MU, carries out CPRI frame solving frame process when up-link and obtains baseband signal, by the base band from multichannel EU
Signal carries out summation process, is converted to radio signal transmission to base station after the base band signal process after summation；
Described MU mainly realizes the conversion between radiofrequency signal and optical signal, including DDC/DUC module, CPRI interface module and
SERDES interface module；
Described EU mainly realizes the conversion between optical signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface
Module and SERDES interface module；
Described RU mainly realizes the conversion between radiofrequency signal and ten thousand mbit ethernet signals, connects including XGMII interface module, CPRI
Mouth die block and DDC/DUC module.
Beneficial effect:
Compared with prior art, this programme is capable of wireless signal transmission in ten thousand mbit ethernets, by ten thousand mbit ethernets
Transmission realizes the covering of wireless signal multi-standard, vast capacity, can be carried out once by all standard signals of three big operators
Property cover, reduce construction times, reducing wireless signal covers cost, it is achieved get up flexible, meets base station Joint construction and sharing
Theory.
Accompanying drawing explanation
Fig. 1 is a kind of method flow diagram utilizing ten thousand mbit ethernet transmission wireless signals that the present invention provides.
Fig. 2 is the method flow diagram that the another kind that the present invention provides utilizes ten thousand mbit ethernet transmission wireless signals.
Fig. 3 is the composition frame chart of a kind of system utilizing ten thousand mbit ethernet transmission wireless signals that the present invention provides.
Fig. 4 is the internal signal handling process of each unit of system described in the invention.
Fig. 5 is the CPRI protocol frame structure of the 10Gbps speed that system described in the invention uses.
Explanation of nouns:
MU-near-end main frame access unit；EU-expanding element；RU-far-end extension unit.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention do not limit
In this.
Embodiment 1:
Fig. 1 is a kind of method flow diagram utilizing ten thousand mbit ethernet transmission wireless signals that the present invention provides.As it is shown in figure 1, this
A kind of method utilizing ten thousand mbit ethernet transmission wireless signals described in invention, during downlink, described method includes following step
Rapid:
Step S1, MU are converted to baseband signal by processing from the radiofrequency signal of base stations couple, and then composition CPRI frame, passes through optical fiber
Pass to EU end；
The CPRI frame received is packaged into ten thousand mbit ethernet frames by step S2, EU, through 10,000,000,000 PHY chip and network cable transmission to RU
End；
The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame by step S3, RU, then solve CPRI frame and obtain baseband signal, then locate
Reason is converted into radiofrequency signal output, it is achieved the multi-standard of wireless signal, the covering of vast capacity.
The present invention uses FPGA(field programmable gate array) realize, example 10Gbps speed in the FPGA of MU Yu EU
High speed serialization deserializer core (serdes core can be called for short), led to by laser instrument and the optical fiber of 10Gbps between MU and EU
Letter.The Ethernet core of example 10Gbps speed in the FPGA of EU Yu RU, the PHY(physical layer of exterior arrangement 10Gbps speed) core
Sheet, is communicated with ten thousand mbit ethernet agreements by netting twine between EU and RU.On the uplink, MU will come in from base stations couple
Radiofrequency signal through DDC(Digital Down Convert) be converted to baseband signal after resume module, the then composition general public nothing of CPRI(
Line interface) frame, by fiber-optic transfer to EU end；The CPRI frame received is packaged into ten thousand mbit ethernet frames by EU, through 10,000,000,000 PHY
Chip and network cable transmission are to RU end；The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame by RU, then solve CPRI frame and obtain base band
Signal, is then passed through DUC(Digital Up Convert) be converted into radiofrequency signal after resume module after, exported by antenna.
During downlink, described step S1, particularly as follows:
Radiofrequency signal is converted to baseband signal through DDC resume module by MU, then according to CPRI protocol frame knot as shown in Figure 5
The CPRI frame of structure composition 10Gbps speed, then by parallel CPRI frame data through the high speed serialization deserializer of 10Gbps speed
Consideration convey changes the high-speed serial signals of 10Gbps speed into, passes to EU end by laser instrument and optical fiber；
Described step S2, particularly as follows:
The high speed serialization of 10Gbps speed that EU will be received by the high speed serialization deserializer core of laser instrument and 10Gbps speed
Signal is converted into parallel CPRI frame data, and then data add frame head and the postamble of ten thousand mbit ethernets, be packaged into 10,000,000,000 with
Become serial signal to be at a high speed sent to 10,000,000,000 PHY chip by XGMII interface conversion after net frame very much, afterwards by RJ45 interface and
Network cable transmission is to RU end；
Described step S3, particularly as follows:
RU becomes 10,000,000,000 through XGMII interface conversion after receiving ten thousand mbit ethernet signals by RJ45 interface and 10,000,000,000 PHY chip
Ethernet frame, then removes frame head and the postamble of ten thousand mbit ethernets, is reduced into the CPRI frame of 10Gbps speed, then solves CPRI frame and obtain
To baseband signal, then baseband signal is converted into radiofrequency signal after DUC resume module, is launched by the antenna of RU
Go, it is achieved the covering of wireless signal.
In the above-mentioned method utilizing ten thousand mbit ethernets transmission wireless signals, CPRI frame to be realized and ten thousand mbit ethernet frames it
Between conversion, need CPRI frame is carried out encapsulation and the decapsulation of Ethernet bag.The encapsulation of Ethernet bag is 10Gbps speed
CPRI frame add frame head and postamble according to the agreement of ten thousand mbit ethernets, owing to CPRI frame data are continuous print, ethernet frame is
Fixing bag is long, and the two work clock is the most inconsistent, needs exist for a FIFO(first in first out) carry out at cross clock domain
Reason and the encapsulation of Ethernet bag.The decapsulation of Ethernet bag is contrary with encapsulation process.
In order to ensure the stable of system and reliable, all EU and RU work clocks all recover from MU, for recovered clock,
Need to carry out Link State detection before the CPRI frame solution frame of downlink.Carry out Link State detection for convenience, particularly as follows:
MU inserts an ID numbering, EU and RU on downlink during CPRI framing in a certain fixed position of CPRI frame
Judge whether from this interface recovered clock by the scope of detection ID numbering, this ensure that the stable of system clock with can
Lean on.Citing is as it is shown in figure 1, when a MU equipment connects 8 EU equipment, near-end has 8 light mouth number consecutivelies to be that 1-8, EU end will
Receive ID numbering and be forwarded to next stage equipment.In up-link, RU does not send ID and numbers near-end, EU on such downlink
With whether RU judges whether from this interface recovered clock by the scope of detection ID numbering between 1-8, this ensure that and be
Stablizing with reliable of system clock.
Fig. 5 is the CPRI protocol frame structure of the 10Gbps speed that system described in the invention uses.As it is shown in figure 5, CPRI
Frame uses pattern nested step by step, 31bit data one word of composition, 32 word one basic frames of composition, 256 basic frame compositions
One superframe, 150 superframe one radio frames of composition.
Embodiment 2:
The present embodiment is with the difference of above-described embodiment 1, and the present embodiment 2 uses ten thousand mbit ethernet transmission nothings when being up-link
The method of line signal, the content of the most detailed description, refer to embodiment of the method 1.
Fig. 2 is the method flow diagram that the another kind that the present invention provides utilizes ten thousand mbit ethernet transmission wireless signals.Such as Fig. 2 institute
Show, of the present invention a kind of utilize ten thousand mbit ethernets transmission wireless signals method, during up-link, described method include with
Lower step:
The radiofrequency signal of reception is processed and is converted to baseband signal by step S1, RU, then according to CPRI protocol frame structure composition
CPRI frame, and be packaged into further after ten thousand mbit ethernet frames through 10,000,000,000 PHY chip and network cable transmission to EU end；
The ten thousand mbit ethernet frames received are reduced into CPRI frame by step S2, EU, and CPRI frame carries out solving frame process and obtain base
Band signal, carries out summation process, afterwards then by the baseband signal after summation according to CPRI by the baseband signal from multichannel RU
Parallel CPRI frame data are converted into high-speed serial signals, by laser instrument and light by protocol frame structure composition CPRI frame afterwards
Fibre is transferred to MU end；
The high-speed serial signals received is converted into parallel CPRI frame data by step S3, MU, and carries out CPRI frame solving frame
Process obtains baseband signal, afterwards the baseband signal from multichannel EU is carried out summation process, at the baseband signal after summation
Radio signal transmission is converted to base station after reason.
The present invention uses FPGA(field programmable gate array) realize, example 10Gbps speed in the FPGA of MU Yu EU
High speed serialization deserializer core (serdes core can be called for short), led to by laser instrument and the optical fiber of 10Gbps between MU and EU
Letter.The Ethernet core of example 10Gbps speed in the FPGA of EU Yu RU, the PHY(physical layer of exterior arrangement 10Gbps speed) core
Sheet, is communicated with ten thousand mbit ethernet agreements by netting twine between EU and RU.
During up-link, described step S1, particularly as follows:
The radiofrequency signal received by antenna is converted to baseband signal after DDC resume module by RU, then according to CPRI
Then data are added frame head and the postamble of ten thousand mbit ethernets, are packaged into by the CPRI frame of protocol frame structure composition 10Gbps speed
Become serial signal to be at a high speed sent to 10,000,000,000 PHY chip by XGMII interface conversion after ten thousand mbit ethernet frames, pass through RJ45 afterwards
Interface and network cable transmission are to EU end；
Described step S2, particularly as follows:
EU becomes 10,000,000,000 through XGMII interface conversion after receiving ten thousand mbit ethernet signals by RJ45 interface and 10,000,000,000 PHY chip
Ethernet frame, then removes frame head and the postamble of ten thousand mbit ethernets, is reduced into the CPRI frame of 10Gbps speed, and is entered by CPRI frame
Row solves frame process and obtains baseband signal, the baseband signal from multichannel RU carries out summation process afterwards, after then suing for peace
Parallel CPRI frame data, according to the CPRI frame of CPRI protocol frame structure composition 10Gbps speed, are passed through by baseband signal afterwards
The high speed serialization deserializer consideration convey of 10Gbps speed changes the high-speed serial signals of 10Gbps speed into, is passed by laser instrument and optical fiber
It is passed to MU end；
Described step S3, particularly as follows:
The high speed serialization of 10Gbps speed that MU will be received by the high speed serialization deserializer core of laser instrument and 10Gbps speed
Signal is converted into parallel CPRI frame data, and CPRI frame carries out solving frame processes and obtain baseband signal, afterwards will be from multichannel
The baseband signal of EU carries out summation process, the baseband signal after summation is converted to after DUC resume module radiofrequency signal and passes
It is passed to base station.
Embodiment 3:
The present embodiment 3 is the system embodiment of embodiment 1, and the content of the most detailed description refers to embodiment
1。
As it is shown on figure 3, a kind of system utilizing ten thousand mbit ethernet transmission wireless signals of the present invention, including near-end master
Machine access unit (MU), expanding element (EU) and far-end extension unit (RU), a MU can connect multiple EU equipment, and an EU can
To connect multiple RU equipment；
Usually, MU is placed in machine room, and the radiofrequency signal from base station is carried out coupling access and changes into base band by downlink
Signal, baseband signal is changed into the radiofrequency signal of simulation by up-link, and a MU can connect multiple EU equipment；The building that EU places
Mainly baseband signal being carried out forward process in road, an EU can connect multiple RU equipment；RU is placed on each floor, descending chain
Baseband signal is changed into radiofrequency signal and carries out wireless coverage by road, and radiofrequency signal is changed into baseband signal and passes to MU by up-link
End.
When the present invention implements, it is only necessary to according to the system block diagram shown in Fig. 3, MU, EU and RU equipment is carried out installation can be real
The existing multi-standard of wireless signal, the covering of vast capacity.For convenience of description, the transmission link sending data to remote RU from MU is claimed
For downlink, the transmission link sending data to MU from RU is referred to as up-link.
Described MU, changes into baseband signal by the radiofrequency signal of base stations couple when downlink, then forms CPRI
Frame, by fiber-optic transfer to EU end；
Described EU, is packaged into ten thousand mbit ethernet frames by the CPRI frame received when downlink, through 10,000,000,000 PHY chip and
Network cable transmission is to RU end；
The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame when downlink by described RU, then solve CPRI frame and obtain base
Band signal, is then processed after being converted into radiofrequency signal, is exported by antenna.
As shown in Figure 4, MU mainly realizes the conversion between radiofrequency signal and optical signal, connects including DDC/DUC module, CPRI
Mouth die block and SERDES interface module；
EU mainly realizes the conversion between optical signal and ten thousand mbit ethernet signals, including XGMII(10Gb connecing independent of media
Mouthful) interface module, CPRI interface module and SERDES interface module；
RU mainly realizes the conversion between radiofrequency signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface mould
Block and DDC/DUC module.
Embodiment 4:
The present embodiment 4 is the system embodiment of embodiment 2, and the content of the most detailed description refers to embodiment
2.The present embodiment 4 is identical with the system of embodiment 3 composition structure.
As it is shown on figure 3, a kind of system utilizing ten thousand mbit ethernet transmission wireless signals of the present invention, including near-end master
Machine access unit (MU), expanding element (EU) and far-end extension unit (RU), a MU can connect multiple EU equipment, and an EU can
To connect multiple RU equipment；
Described RU, processes the radiofrequency signal of reception when up-link and is converted to baseband signal, then according to CPRI agreement
Frame structure composition CPRI frame, and be packaged into further after ten thousand mbit ethernet frames through 10,000,000,000 PHY chip and network cable transmission to EU end；
The ten thousand mbit ethernet frames received are reduced into CPRI frame when up-link by described EU, and by CPRI frame Xie Zhengchu
Reason obtains baseband signal, the baseband signal from multichannel RU carries out summation process afterwards, then by the baseband signal after summation
Form CPRI frame according to CPRI protocol frame structure, afterwards parallel CPRI frame data are converted into high-speed serial signals, by swashing
Light device and fiber-optic transfer are to MU end；
Described MU, carries out CPRI frame solving frame process when up-link and obtains baseband signal, by the base band from multichannel EU
Signal carries out summation process, is converted to radio signal transmission to base station after the base band signal process after summation.
As shown in Figure 4, described MU mainly realizes the conversion between radiofrequency signal and optical signal, including DDC/DUC module,
CPRI interface module and SERDES interface module；
Described EU mainly realizes the conversion between optical signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface
Module and SERDES interface module；
Described RU mainly realizes the conversion between radiofrequency signal and ten thousand mbit ethernet signals, connects including XGMII interface module, CPRI
Mouth die block and DDC/DUC module.
Usually, MU is placed in machine room, and the radiofrequency signal from base station is carried out coupling access and changes into by downlink
Baseband signal, baseband signal is changed into the radiofrequency signal of simulation by up-link, and a MU can connect multiple EU equipment；EU places
Corridor in mainly baseband signal is carried out forward process, an EU can connect multiple RU equipment；RU is placed on each floor, under
Baseband signal is changed into radiofrequency signal and carries out wireless coverage by line link, and radiofrequency signal is changed into baseband signal and passes by up-link
To MU end.
When the present invention implements, it is only necessary to according to the system block diagram shown in Fig. 3, MU, EU and RU equipment is carried out installation can be real
The existing multi-standard of wireless signal, the covering of vast capacity.For convenience of description, the transmission link sending data to remote RU from MU is claimed
For downlink, the transmission link sending data to MU from RU is referred to as up-link.
Examples detailed above is the present invention preferably embodiment, but embodiments of the present invention are not limited by above-described embodiment
System, the change made under the spirit of other any present invention of not running counter to and principle, modify, substitute, combine, simplifying all should
For equivalence substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. the method utilizing ten thousand mbit ethernet transmission wireless signals, is characterized in that:
During downlink, said method comprising the steps of:
Step S1, MU are converted to baseband signal by processing from the radiofrequency signal of base stations couple, and then composition CPRI frame, passes through optical fiber
Pass to EU end；
The CPRI frame received is packaged into ten thousand mbit ethernet frames by step S2, EU, through 10,000,000,000 PHY chip and network cable transmission to RU
End；
The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame by step S3, RU, then solve CPRI frame and obtain baseband signal, then locate
Reason is converted into radiofrequency signal output, it is achieved the multi-standard of wireless signal, the covering of vast capacity.
The most according to claim 1 a kind of utilize ten thousand mbit ethernets transmission wireless signals method, it is characterized in that: MU with
The high speed serialization deserializer core of example 10Gbps speed in the FPGA of EU, by laser instrument and the optical fiber of 10Gbps between MU and EU
Communicate；
The Ethernet core of example 10Gbps speed, the PHY chip of exterior arrangement 10Gbps speed, EU and RU in the FPGA of EU Yu RU
Between communicated with ten thousand mbit ethernet agreements by netting twine.
A kind of method utilizing ten thousand mbit ethernet transmission wireless signals the most according to claim 1, is characterized in that: descending chain
Lu Shi, described step S1, particularly as follows:
Radiofrequency signal is converted to baseband signal through DDC resume module by MU, then according to CPRI protocol frame structure composition
Then parallel CPRI frame data are changed by the CPRI frame of 10Gbps speed through the high speed serialization deserializer consideration convey of 10Gbps speed
Become the high-speed serial signals of 10Gbps speed, pass to EU end by laser instrument and optical fiber；
Described step S2, particularly as follows:
The high speed serialization of 10Gbps speed that EU will be received by the high speed serialization deserializer core of laser instrument and 10Gbps speed
Signal is converted into parallel CPRI frame data, and then data add frame head and the postamble of ten thousand mbit ethernets, be packaged into 10,000,000,000 with
Become serial signal to be at a high speed sent to 10,000,000,000 PHY chip by XGMII interface conversion after net frame very much, afterwards by RJ45 interface and
Network cable transmission is to RU end；
Described step S3, particularly as follows:
RU becomes 10,000,000,000 through XGMII interface conversion after receiving ten thousand mbit ethernet signals by RJ45 interface and 10,000,000,000 PHY chip
Ethernet frame, then removes frame head and the postamble of ten thousand mbit ethernets, is reduced into the CPRI frame of 10Gbps speed, then solves CPRI frame and obtain
To baseband signal, then baseband signal is converted into radiofrequency signal after DUC resume module, is launched by the antenna of RU
Go, it is achieved the covering of wireless signal.
A kind of method utilizing ten thousand mbit ethernet transmission wireless signals the most according to claim 1, is characterized in that: in order to protect
Stablizing and reliable of card system, all EU and RU work clocks all recover from MU, particularly as follows:
MU inserts an ID numbering, EU and RU on downlink during CPRI framing in a certain fixed position of CPRI frame
Judge whether from this interface recovered clock by the scope of detection ID numbering, this ensure that the stable of system clock with can
Lean on.
5. the method utilizing ten thousand mbit ethernet transmission wireless signals, is characterized in that:
During up-link, said method comprising the steps of:
The radiofrequency signal of reception is processed and is converted to baseband signal by step S1, RU, then according to CPRI protocol frame structure composition
CPRI frame, and be packaged into further after ten thousand mbit ethernet frames through 10,000,000,000 PHY chip and network cable transmission to EU end；
The ten thousand mbit ethernet frames received are reduced into CPRI frame by step S2, EU, and CPRI frame carries out solving frame process and obtain base
Band signal, carries out summation process, afterwards then by the baseband signal after summation according to CPRI by the baseband signal from multichannel RU
Parallel CPRI frame data are converted into high-speed serial signals, by laser instrument and light by protocol frame structure composition CPRI frame afterwards
Fibre is transferred to MU end；
The high-speed serial signals received is converted into parallel CPRI frame data by step S3, MU, and carries out CPRI frame solving frame
Process obtains baseband signal, afterwards the baseband signal from multichannel EU is carried out summation process, at the baseband signal after summation
Radio signal transmission is converted to base station after reason.
The most according to claim 5 a kind of utilize ten thousand mbit ethernets transmission wireless signals method, it is characterized in that: MU with
The high speed serialization deserializer core of example 10Gbps speed in the FPGA of EU, by laser instrument and the optical fiber of 10Gbps between MU and EU
Communicate；
The Ethernet core of example 10Gbps speed, the PHY chip of exterior arrangement 10Gbps speed, EU and RU in the FPGA of EU Yu RU
Between communicated with ten thousand mbit ethernet agreements by netting twine.
A kind of method utilizing ten thousand mbit ethernet transmission wireless signals the most according to claim 5, is characterized in that: uplink
Lu Shi, described step S1, particularly as follows:
The radiofrequency signal received by antenna is converted to baseband signal after DDC resume module by RU, then according to CPRI
Then data are added frame head and the postamble of ten thousand mbit ethernets, are packaged into by the CPRI frame of protocol frame structure composition 10Gbps speed
Become serial signal to be at a high speed sent to 10,000,000,000 PHY chip by XGMII interface conversion after ten thousand mbit ethernet frames, pass through RJ45 afterwards
Interface and network cable transmission are to EU end；
Described step S2, particularly as follows:
EU becomes 10,000,000,000 through XGMII interface conversion after receiving ten thousand mbit ethernet signals by RJ45 interface and 10,000,000,000 PHY chip
Ethernet frame, then removes frame head and the postamble of ten thousand mbit ethernets, is reduced into the CPRI frame of 10Gbps speed, and is entered by CPRI frame
Row solves frame process and obtains baseband signal, the baseband signal from multichannel RU carries out summation process afterwards, after then suing for peace
Parallel CPRI frame data, according to the CPRI frame of CPRI protocol frame structure composition 10Gbps speed, are passed through by baseband signal afterwards
The high speed serialization deserializer consideration convey of 10Gbps speed changes the high-speed serial signals of 10Gbps speed into, is passed by laser instrument and optical fiber
It is passed to MU end；
Described step S3, particularly as follows:
The high speed serialization of 10Gbps speed that MU will be received by the high speed serialization deserializer core of laser instrument and 10Gbps speed
Signal is converted into parallel CPRI frame data, and CPRI frame carries out solving frame processes and obtain baseband signal, afterwards will be from multichannel
The baseband signal of EU carries out summation process, the baseband signal after summation is converted to after DUC resume module radiofrequency signal and passes
It is passed to base station.
8. use the system of method utilizing ten thousand mbit ethernets transmission wireless signals described in any one of claim 1-4,
It is characterized in that: include near-end main frame access unit (MU), expanding element (EU) and far-end extension unit (RU), a MU can connect
Multiple EU equipment, an EU can connect multiple RU equipment；
Described MU, changes into baseband signal by the radiofrequency signal of base stations couple when downlink, then composition CPRI frame, logical
Cross fiber-optic transfer to EU end；
Described EU, is packaged into ten thousand mbit ethernet frames by the CPRI frame received when downlink, through 10,000,000,000 PHY chip and
Network cable transmission is to RU end；
The ten thousand mbit ethernet frames deblockings received are changed into CPRI frame when downlink by described RU, then solve CPRI frame and obtain base
Band signal, is then processed after being converted into radiofrequency signal, is exported by antenna.
A kind of system utilizing ten thousand mbit ethernet transmission wireless signals the most according to claim 8, is characterized in that: MU is main
Realize the conversion between radiofrequency signal and optical signal, including DDC/DUC module, CPRI interface module and SERDES interface module；
EU mainly realizes the conversion between optical signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface module
With SERDES interface module；
RU mainly realizes the conversion between radiofrequency signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface mould
Block and DDC/DUC module.
10. use the system of method utilizing ten thousand mbit ethernets transmission wireless signals described in any one of claim 5-7,
It is characterized in that: include near-end main frame access unit (MU), expanding element (EU) and far-end extension unit (RU), a MU can connect
Multiple EU equipment, an EU can connect multiple RU equipment；
Described RU, processes the radiofrequency signal of reception when up-link and is converted to baseband signal, then according to CPRI agreement
Frame structure composition CPRI frame, and be packaged into further after ten thousand mbit ethernet frames through 10,000,000,000 PHY chip and network cable transmission to EU end；
The ten thousand mbit ethernet frames received are reduced into CPRI frame when up-link by described EU, and by CPRI frame Xie Zhengchu
Reason obtains baseband signal, the baseband signal from multichannel RU carries out summation process afterwards, then by the baseband signal after summation
Form CPRI frame according to CPRI protocol frame structure, afterwards parallel CPRI frame data are converted into high-speed serial signals, by swashing
Light device and fiber-optic transfer are to MU end；
Described MU, carries out CPRI frame solving frame process when up-link and obtains baseband signal, by the base band from multichannel EU
Signal carries out summation process, is converted to radio signal transmission to base station after the base band signal process after summation；
Described MU mainly realizes the conversion between radiofrequency signal and optical signal, including DDC/DUC module, CPRI interface module and
SERDES interface module；
Described EU mainly realizes the conversion between optical signal and ten thousand mbit ethernet signals, including XGMII interface module, CPRI interface
Module and SERDES interface module；
Described RU mainly realizes the conversion between radiofrequency signal and ten thousand mbit ethernet signals, connects including XGMII interface module, CPRI
Mouth die block and DDC/DUC module.
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| CN109495728A (en) * | 2018-12-26 | 2019-03-19 | 中国科学院长春光学精密机械与物理研究所 | A kind of fibre-optic transmission system (FOTS) and transmission method |
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