CN110166329A - A kind of communication means, apparatus and system - Google Patents

A kind of communication means, apparatus and system Download PDF

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Publication number
CN110166329A
CN110166329A CN201810150830.0A CN201810150830A CN110166329A CN 110166329 A CN110166329 A CN 110166329A CN 201810150830 A CN201810150830 A CN 201810150830A CN 110166329 A CN110166329 A CN 110166329A
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CN
China
Prior art keywords
analog signal
signal flow
dpu
stream
flow
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Withdrawn
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CN201810150830.0A
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Chinese (zh)
Inventor
方李明
涂建平
张晓风
李泽彬
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201810150830.0A priority Critical patent/CN110166329A/en
Priority to PCT/CN2018/096913 priority patent/WO2019157795A1/en
Publication of CN110166329A publication Critical patent/CN110166329A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments
    • H04L12/2878—Access multiplexer, e.g. DSLAM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections

Abstract

The embodiment of the present application discloses a kind of communication means, apparatus and system, is related to field of communication technology, is able to solve existing distributed node cells D PU power consumption and the larger problem of higher cost, volume.This method comprises: DPU receives the n way analog signal flow that couple in multiplexer DSLAM is sent by digital user wire DSL, the first stream compression is changed to what n way analog signal flow obtained for DSLAM by n way analog signal flow, n >=2；The combining of n way analog signal flow is the first analog signal flow by DPU；DPU sends the first analog signal flow at least one user front end device CPE by DSL, in order to which the first analog signal flow received is converted to the first data flow by each CPE.

Description

A kind of communication means, apparatus and system
Technical field
The invention relates to field of communication technology more particularly to a kind of communication means, apparatus and system.
Background technique
Intelligent acess technology includes Fiber To The Curb (Fiber To The Curb, FTTC), optical fiber to people's well (Fiber To The Manhole, FTTM) and fiber to the floor (Fiber To The Building, FTTB) etc..
In order to further excavate the bandwidth potential of existing copper wire, now begin to consider using FTTC/FTTM technology and Copper wire is used to the comprehensive of building (Copper to The Building, CuTTB) technology, i.e. the digital subscriber of the side FTTC/FTTM Line (Digital Subscriber Line, DSL) couple in multiplexer (DSL Access Multiplexer, DSLAM) be located at Data back is carried out using copper wire between the distribution dot element (Distribution Point Unit, DPU) of the position CuTTB.Figure 1 shows the communication system for having this structure, wherein DPU and at least one user front end device (Customer Premises Equipment, CPE) connection, copper wire, which is all made of, between DPU and each CPE carries out data transmission.
In communication system shown in fig. 1, the stream compression got from network server is changed to multichannel low strap by DSLAM Width analog signal flow, and the sub- analog signal flow of multichannel low bandwidth is sent to DPU；DPU is receiving multichannel low bandwidth It after analog signal flow, needs to parse the sub- analog signal flow of multichannel low bandwidth, analog-to-digital conversion, the processing such as modulation, with High-bandwidth data stream all the way is generated, to send the high-bandwidth data stream to the CPE connecting with the DPU.
In the above method, DPU needs a large amount of Digital Signal Processing (Digital Signal Processing, DSP) single Member, leads to that the power consumption of DPU is higher, volume is larger, higher cost.
Summary of the invention
The embodiment of the present application provides a kind of communication means, apparatus and system, be able to solve existing DPU power consumption and cost compared with Problem high, volume is larger.
In order to achieve the above objectives, the application adopts the following technical scheme that
In a first aspect, providing a kind of communication means, DPU receives the n way mould that DSLAM is sent by digital user wire DSL First stream compression is changed to n (n >=2) way analog signal flow for DSLAM and obtained by quasi- signal stream, the n way analog signal flow 's；Then, which is the first analog signal flow by the combining of n way analog signal flow, and is sent by DSL at least one CPE First analog signal flow, in order to which the first analog signal flow received is converted to the first data flow by each CPE.
Band of the bandwidth of every way analog signal flow in the sub- analog signal flow of said n routes less than the first analog signal flow Width, DPU are combined the first analog signal flow for higher bandwidth after receiving the wide sub- analog signal flow of the road n smaller strip, And first analog signal flow is sent to CPE.DPU in the embodiment of the present application no longer has digital signal processing function, only protects The processing module of analog signal is stayed, thus the volume and cost that reduce the power consumption of DPU, reduce DPU.Further, since DPU is only protected The processing module of analog signal is stayed, therefore, the delay of data processing can also decline.
Optionally, in a kind of possible implementation of the application, DPU also receive DSLAM transmission be used to indicate DPU The first configuration signal of combining parameter corresponding with branch parameter is configured, which is DSLAM by the first stream compression It is changed to used parameter during n way analog signal flow, after receiving the first configuration signal, DPU matches according to first Confidence number, configuration combining parameter.Correspondingly, the side of above-mentioned " combining of n way analog signal flow is the first analog signal flow by DPU " Method are as follows: the combining of n way analog signal flow is the first analog signal flow according to combining parameter by DPU.
First configuration signal may include above-mentioned branch parameter, can also be only the instruction letter for playing indicative function Number, the embodiment of the present application is not especially limited this.DPU can guarantee DPU according to the first configuration signal, configuration combining parameter When to the combining of n way analog signal flow by the way of and the first stream compression is changed to the mistake of n way analog signal flow by DSLAM Journey branch is corresponding by the way of.
Optionally, in the alternatively possible implementation of the application, above-mentioned " n way analog signal flow is combined by DPU For the first analog signal flow " method are as follows: DPU adopted each way analog signal flow in n way analog signal flow Sample, and the sub- analog signal flow after all over-samplings is combined, to generate the first analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned " DPU is in n way analog signal flow The method of each way analog signal flow progress over-sampling " are as follows: DPU simulates letter to each way in n way analog signal flow Number stream carry out quadrature sampling, to obtain the sub- analog signal flow after the quadrature sampling of the road n.Correspondingly, above-mentioned, " DPU adopts all mistakes The method of sub- analog signal flow combining after sample, to generate the first analog signal flow " are as follows: DPU is by the submodule after the quadrature sampling of the road n Quasi- signal stream combining, to generate the first analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned " n way analog signal flow is combined by DPU For the first analog signal flow " method are as follows: DPU to n way analog signal flow carry out orthogonal modulation, to generate the first analog signal Stream.
Optionally, in the alternatively possible implementation of the application, in n=2K, in the case where K >=1, above-mentioned " DPU By n way analog signal flow combining be the first analog signal flow " method are as follows: DPU use n-1 quadrature modulator, to n way Analog signal flow carries out K grades of orthogonal modulations, to generate the first analog signal flow.Wherein, orthogonal in the i-stage of K grades of orthogonal modulations In modulated process, DPU uses 2K-iA quadrature modulator, to 2K-i+1Road signal stream to be modulated carries out orthogonal modulation, obtains 2K-iRoad Modulated signal stream, i ∈ 1 ..., K }.The signal stream to be modulated of 1st grade of orthogonal modulation is sub- analog signal flow, and K grades just The modulated signal stream that intermodulation is made is the first analog signal flow.
Optionally, in the alternatively possible implementation of the application, in n=2M(2p+1), M >=1, the feelings of p >=0 Under condition, the method for above-mentioned " combining of n way analog signal flow is the first analog signal flow by DPU " are as follows: DPU is usedA quadrature modulator carries out M grades of orthogonal modulations to n way analog signal flow, obtains the road 2p+1 Modulated signal, and the road 2p+1 modulated signal is combined, to generate the first analog signal flow.Wherein, in the jth of M grades of orthogonal modulations In grade quadrature modulation process, DPU uses (2p+1) 2M-jA quadrature modulator, to (2p+1) 2M-j+1Road signal stream to be modulated Orthogonal modulation is carried out, (2p+1) 2 is obtainedM-jRoad modulated signal stream, j ∈ { 1 ..., M }, the 1st grade of orthogonal modulation wait adjust Signal stream processed is sub- analog signal flow.
Optionally, in the alternatively possible implementation of the application, in n=2M(2p+2), M >=1, the feelings of p >=0 Under condition, the method for above-mentioned " combining of n way analog signal flow is the first analog signal flow by DPU " are as follows: DPU uses 2M-1·(2p+ 2) a quadrature modulator carries out orthogonal modulation to n way analog signal flow, obtains 2M-1The road (2p+2) modulated signal, and by 2M -1(2p+2) road modulated signal combining, to generate the first analog signal flow.
In the embodiment of the present application, the mode that the combining of n way analog signal flow is the first analog signal flow can be more by DPU Kind, the embodiment of the present application is not especially limited this.
Optionally, in the alternatively possible implementation of the application, the sum of the bandwidth of n way analog signal flow is less than Or the bandwidth equal to the first analog signal flow；The bandwidth of each way analog signal flow in n way analog signal flow is less than The bandwidth of one data flow.
Second aspect provides a kind of DPU.Specifically, the DPU includes receiving unit, combiner unit and transmission unit.
The function that each unit module provided by the present application is realized is specific as follows:
Above-mentioned receiving unit is simulated for receiving couple in multiplexer DSLAM by the n way that digital user wire DSL is sent First stream compression is changed to what n way analog signal flow obtained for DSLAM by signal stream, n way analog signal flow, n >=2.On Combiner unit is stated, the n way analog signal flow combining for receiving above-mentioned receiving unit is the first analog signal flow.It is above-mentioned Transmission unit is believed for sending the first simulation that above-mentioned combiner unit generates at least one user front end device CPE by DSL Number stream, in order to which the first analog signal flow received is converted to the first data flow by each CPE.
Optionally, in a kind of possible implementation of the application, above-mentioned receiving unit is also used to receive DSLAM hair The the first configuration signal sent, the first configuration signal are used to indicate DPU and configure combining parameter corresponding with branch parameter, branch parameter For DSLAM during the first stream compression is changed to n way analog signal flow used parameter.The embodiment of the present application mentions The DPU of confession further includes configuration unit, the configuration unit, for according to the first configuration signal, configuration combining parameter.Above-mentioned combining list The combining of n way analog signal flow is the first analog signal specifically for the combining parameter according to above-mentioned configuration of described dispensing unit by member Stream.
Optionally, in the alternatively possible implementation of the application, DPU provided by the embodiments of the present application further includes adopting Sample unit, each way in n way analog signal flow which is used to receive above-mentioned receiving unit simulate letter Number stream carry out over-sampling.Above-mentioned combiner unit, specifically for by the sub- analog signal flow after all above-mentioned sampling unit over-samplings Combining, to generate the first analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned sampling unit is specifically used for n way Each way analog signal flow in analog signal flow carries out quadrature sampling, to obtain the sub- analog signal after the quadrature sampling of the road n Stream.Above-mentioned combiner unit is combined specifically for the sub- analog signal flow after sampling unit quadrature sampling is stated in the road n, to generate First analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned combiner unit specifically simulates n way Signal stream carries out orthogonal modulation, to generate the first analog signal flow.
Optionally, in the alternatively possible implementation of the application, in n=2K, in the case where K >=1, above-mentioned combining Unit is specifically used for: using n-1 quadrature modulator, K grades of orthogonal modulations is carried out to n way analog signal flow, to generate first Analog signal flow.Wherein, in the i-stage quadrature modulation process of K grades of orthogonal modulations, DPU uses 2K-iA quadrature modulator, it is right 2K-i+1Road signal stream to be modulated carries out orthogonal modulation, obtains 2K-iRoad modulated signal stream, i ∈ 1 ..., K }；1st grade orthogonal The signal stream to be modulated of modulation is sub- analog signal flow, and the modulated signal stream that K grades of orthogonal modulations obtain is the first analog signal Stream.
Optionally, in the alternatively possible implementation of the application, in n=2M(2p+1), M >=1, the feelings of p >=0 Under condition, above-mentioned combiner unit is specifically used for: usingA quadrature modulator, to n way analog signal Stream carries out M grades of orthogonal modulations, obtains the road 2p+1 modulated signal；The road 2p+1 modulated signal is combined, to generate the first analog signal Stream.Wherein, in the j-th stage quadrature modulation process of M grades of orthogonal modulations, DPU uses (2p+1) 2M-jA quadrature modulator, it is right (2p+1)·2M-j+1Road signal stream to be modulated carries out orthogonal modulation, obtains (2p+1) 2M-jRoad modulated signal stream, j ∈ 1 ..., and M }, the signal stream to be modulated of the 1st grade of orthogonal modulation is sub- analog signal flow.
Optionally, in the alternatively possible implementation of the application, in n=2M(2p+2), M >=1, the feelings of p >=0 Under condition, above-mentioned combiner unit is specifically used for: using 2M-1(2p+2) a quadrature modulator carries out just n way analog signal flow Intermodulation system obtains 2M-1The road (2p+2) modulated signal；By 2M-1(2p+2) road modulated signal combining, to generate the first simulation letter Number stream.
Optionally, in the alternatively possible implementation of the application, the sum of the bandwidth of n way analog signal flow is less than Or the bandwidth equal to the first analog signal flow；The bandwidth of each way analog signal flow in n way analog signal flow is less than The bandwidth of one data flow.
The third aspect provides a kind of DPU, which includes: one or more processors, memory, communication interface.Wherein, Memory, communication interface are coupled with one or more processors；DPU is communicated by communication interface with other equipment, and memory is used In storage computer program code, computer program code includes instruction, when one or more processors execute instruction, DPU Execute the communication means as described in above-mentioned first aspect and its various possible implementations.
Fourth aspect also provides a kind of computer readable storage medium, and finger is stored in the computer readable storage medium It enables；When it runs on DPU, so that the DPU executes the communication such as above-mentioned first aspect and its various possible implementations Method.
5th aspect, also provides a kind of computer program product comprising instruction, when it runs on above-mentioned DPU, makes It obtains the DPU and executes such as communication means of above-mentioned first aspect and its various possible implementations.
Second aspect, the third aspect, fourth aspect, the 5th aspect and its specific of various implementations are retouched in the application It states, it can be with reference to the detailed description in first aspect and its various implementations；Also, second aspect, the third aspect, four directions The beneficial effect in face, the 5th aspect and its various implementations, can be with reference to having in first aspect and its various implementations Beneficial effect analysis, details are not described herein again.
In this application, the name of above-mentioned DPU does not constitute restriction to equipment or functional module itself, in practical implementations, These equipment or functional module can occur with other titles.As long as the function and the application class of each equipment or functional module Seemingly, belong within the scope of the claim of this application and its equivalent technologies.
6th aspect, provides a kind of communication means, DSLAM is after getting the first data flow, by first stream compression It is changed to n (n >=2) way analog signal flow, and the simulation of n way is sent to distributed node cells D PU by digital user wire DSL Signal stream, in order to which the combining of n way analog signal flow is the first analog signal flow by DPU.
First stream compression is changed to the n way analog signal flow of low bandwidth by DSLAM, in this way, in the process sent to DPU In, the bandwidth of DSL can be well adapted to.
Optionally, in a kind of possible implementation of the application, above-mentioned " the first stream compression is changed to the road n by DSLAM The method of sub- analog signal flow " are as follows: DSLAM carries out constellation mapping to the first data flow, to obtain the first digital frequency-domain stream； Then, which carries out serioparallel exchange to the first digital frequency-domain stream, to obtain the road n the first sub-figure frequency-region signal stream；Most Afterwards, which carries out precoding processing, modulation treatment and digital-to-analogue conversion to the road n the first sub-figure frequency-region signal stream, to obtain N way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned " the first stream compression is changed to n by DSLAM The method of way analog signal flow " are as follows: DSLAM carries out constellation mapping and precoding processing to the first data flow, to obtain the Two digital frequency-domain streams；Then, which carries out serioparallel exchange to the second digital frequency-domain stream, to obtain the second son of the road n Digital frequency-domain stream；Finally, the DSLAM carries out modulation treatment and digital-to-analogue conversion to the road n the second sub-figure frequency-region signal stream, To obtain n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned " the first stream compression is changed to n by DSLAM The method of way analog signal flow " are as follows: DSLAM carries out constellation mapping, precoding processing and modulation treatment to the first data flow, To obtain the first digital time domain signal stream；Then, which carries out serioparallel exchange to the first digital time domain signal stream, to obtain n Road the first sub-figure time-domain signal stream；Finally, the DSLAM carries out digital-to-analogue conversion to the road n the first sub-figure time-domain signal stream, to obtain Obtain n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned " the first stream compression is changed to n by DSLAM The method of way analog signal flow " are as follows: DSLAM to the first data flow carry out constellation mapping, precoding processing, modulation treatment and Digital-to-analogue conversion to obtain the second analog signal flow, and carries out serioparallel exchange to the second analog signal flow, to obtain the simulation of n way Signal stream.
As can be seen that DSLAM can carry out serioparallel exchange in different location.
Optionally, in the alternatively possible implementation of the application, DSLAM also sends the first configuration signal to DPU, First configuration signal is used to indicate DPU and configures combining parameter corresponding with branch parameter, and branch parameter is that DSLAM is counted by first Used parameter during n way analog signal flow is changed to according to circulation.
Optionally, in the alternatively possible implementation of the application, DSLAM also passes through DPU and matches to CPE transmission second Confidence number, the second configuration signal are used to indicate CPE and configure processing parameter corresponding with branch parameter, and branch parameter is that DSLAM exists First stream compression is changed to used parameter during n way analog signal flow.
DSLAM sends the first configuration signal to DPU, can guarantee the side used when DPU is combined n way analog signal flow The process branch that first stream compression is changed to n way analog signal flow with DSLAM by formula is corresponding by the way of.Similarly, DSLAM The second configuration signal is sent to CPE, during capable of also guaranteeing CPE to the first analog signal flow is converted to the first data flow The branch mode that the branch mode and DSLAM of use use during the first stream compression is changed to n way analog signal flow It is corresponding.
7th aspect, provides a kind of DSLAM.Specifically, the DSLAM includes acquiring unit, converting unit and sends single Member.
The function that each unit module provided by the present application is realized is specific as follows:
Above-mentioned acquiring unit, for obtaining the first data flow.Above-mentioned converting unit, for getting above-mentioned acquiring unit The first stream compression be changed to n way analog signal flow, n >=2.Above-mentioned transmission unit, for by digital user wire DSL to point Cloth node unit DPU sends the n way analog signal flow that above-mentioned converting unit obtains, in order to which DPU is by n way analog signal Stream combining is the first analog signal flow.
Optionally, in a kind of possible implementation of the application, above-mentioned converting unit is specifically used for: to the first data Planetary mapping is flowed into, to obtain the first digital frequency-domain stream；Serioparallel exchange is carried out to the first digital frequency-domain stream, to obtain Obtain the first sub-figure of the road n frequency-region signal stream；To the road n the first sub-figure frequency-region signal stream carry out precoding processing, modulation treatment with And digital-to-analogue conversion, to obtain n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned converting unit is specifically used for: to the first number According to planetary mapping and precoding processing is flowed into, to obtain the second digital frequency-domain stream；To the second digital frequency-domain stream Serioparallel exchange is carried out, to obtain the road n the second sub-figure frequency-region signal stream；The road n the second sub-figure frequency-region signal stream is modulated Processing and digital-to-analogue conversion, to obtain n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned converting unit is specifically used for: to the first number According to planetary mapping, precoding processing and modulation treatment is flowed into, to obtain the first digital time domain signal stream；When to the first number Domain signal stream carries out serioparallel exchange, to obtain the road n the first sub-figure time-domain signal stream；To the road n the first sub-figure time-domain signal stream Digital-to-analogue conversion is carried out, to obtain n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned converting unit is specifically used for: to the first number According to planetary mapping, precoding processing, modulation treatment and digital-to-analogue conversion is flowed into, to obtain the second analog signal flow；To second Analog signal flow carries out serioparallel exchange, to obtain n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned transmission unit is also used to send to DPU First configuration signal, the first configuration signal are used to indicate DPU and configure combining parameter corresponding with branch parameter, and branch parameter is DSLAM used parameter during the first stream compression is changed to n way analog signal flow.
Optionally, in the alternatively possible implementation of the application, above-mentioned transmission unit is also sent out by DPU to CPE The second configuration signal is sent, the second configuration signal is used to indicate CPE and configures processing parameter corresponding with branch parameter, and branch parameter is DSLAM used parameter during the first stream compression is changed to n way analog signal flow.
Eighth aspect provides a kind of DSLAM, which includes: one or more processors, memory, communication interface. Wherein, memory, communication interface are coupled with one or more processors；DSLAM is communicated by communication interface with other equipment, is deposited Reservoir is for storing computer program code, and computer program code includes instruction, when one or more processors execute instruction When, DSLAM is executed such as the communication means in terms of the above-mentioned 6th and its as described in various possible implementations.
9th aspect, also provides a kind of computer readable storage medium, finger is stored in the computer readable storage medium It enables；When it runs on DSLAM, so that the DSLAM is executed as in terms of the above-mentioned 6th and its various possible implementations Communication means.
Tenth aspect, also provides a kind of computer program product comprising instruction, when it runs on above-mentioned DSLAM, So that the DSLAM is executed as in terms of the above-mentioned 6th and its communication means of various possible implementations.
The 7th aspect, eighth aspect, the 9th aspect, the tenth aspect and its specific of various implementations are retouched in the application It states, it can be with reference to the detailed description in the 6th aspect and its various implementations；Also, the 7th aspect, eighth aspect, the 9th side The beneficial effect in face, the tenth aspect and its various implementations, can be with reference to having in the 6th aspect and its various implementations Beneficial effect analysis, details are not described herein again.
In this application, the name of above-mentioned DSLAM does not constitute restriction to equipment or functional module itself, in practical realization In, these equipment or functional module can occur with other titles.As long as the function and the application of each equipment or functional module It is similar, belong within the scope of the claim of this application and its equivalent technologies.
Tenth on the one hand, a kind of communication system is provided, which is characterized in that including such as above-mentioned second aspect and its any one DPU described in possible implementation, the DSLAM in terms of the above-mentioned 7th and its as described in any one possible implementation with And at least one CPE；Wherein, pass through n (n >=2) DSL connection, at least one described CPE between the CPU and the DSLAM In each CPE pass through DSL and connect with the DPU.
Tenth on the one hand and its various implementations beneficial effect, can with reference to above-mentioned second aspect, the 7th aspect and Beneficial effect analysis in its various implementation, details are not described herein again.
These aspects or other aspects of the application in the following description can more straightforward.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the embodiment of the present application by FTTC/FTTM and the CuTTB communication system formed；
Fig. 2 is the structural schematic diagram of xDSL system in the embodiment of the present application；
Fig. 3 is the flow diagram of communication means provided by the embodiments of the present application；
Fig. 4 is the flow diagram that DSLAM handles data flow in the embodiment of the present application；
Fig. 5 is the flow diagram one that DPU generates the first analog signal flow in the embodiment of the present application；
Fig. 6 is the operation principle schematic diagram of signal multiplexer in the embodiment of the present application；
Fig. 7 is the flow diagram two that the embodiment of the present application DPU generates the first analog signal flow；
Fig. 8 is the flow diagram three that the embodiment of the present application DPU generates the first analog signal flow；
Fig. 9 is the flow diagram four that the embodiment of the present application DPU generates the first analog signal flow；
Figure 10 is the flow diagram five that the embodiment of the present application DPU generates the first analog signal flow；
Figure 11 is the flow diagram one that the embodiment of the present application CPE generates the first data flow；
Figure 12 is the flow diagram two that the embodiment of the present application CPE generates the first data flow；
Figure 13 is the flow diagram that data are transmitted in communication system shown in fig. 1 in the embodiment of the present application；
Figure 14 is the flow diagram one that DPU generates n way analog signal flow in the embodiment of the present application；
Figure 15 is the operation principle schematic diagram of signal demultiplexer in the embodiment of the present application；
Figure 16 is the structural schematic diagram of DPU in the embodiment of the present application；
Figure 17 is the structural schematic diagram of DSLAM in the embodiment of the present application.
Specific embodiment
In the embodiment of the present application, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.This Application embodiment in be described as " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as comparing Other embodiments or design scheme more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words purport Related notion is being presented in specific ways.
Hereinafter, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the embodiment of the present application, unless otherwise indicated, " multiples' " contains Justice is two or more.
Digital Subscriber Line (Digital Subscriber Line, DSL) technology is a kind of by twisted pair telephone, i.e., without The Highspeed Data Transmission Technology that Shielded Twisted Pair (Unshielded Twist Pair, UTP) carries out data transmission, including it is non-right Claim Digital Subscriber Line (Asymmetrical Digital Subscriber Line, ADSL), very high speed digital subscriber line (Very-high-bit-rate Digital Subscriber Line, VDSL), it is based on ISDN Digital Subscriber Line (the ISDN Digital of (Integrated Services Digital Network, ISDN) Subscriber Line, IDSL) and single-line high speed digital subscriber line (Single-pair High-bit-rate Digital Subscriber Line, SHDSL) etc..
In various digital user line technologies (xDSL), other than the DSL of the base band transmissions such as IDSL and SHDSL, using logical DSL with transmission using frequency multiplexing technique make DSL and Plain Old Telephone Service (Plain Old Telephone Service, POTS it) coexists in on a pair of of twisted pair, wherein DSL occupies high band, and POTS occupies 4 kHz (KHz) following base band part Point, POTS signal is separated or is merged by separator/integrator (Splitter) with DSL signal.The xDSL of pass band transfer It is modulated and demodulates using Discrete Multitone Modulation (Discrete Multi-Tone Modulation, DMT) technology.It provides The system of multichannel DSL access is called DSL couple in multiplexer (DSL Access Multiplexer, DSLAM), and system connection is closed It is that schematic diagram is as shown in Figure 2.
As shown in Fig. 2, xDSL system includes DSLAM 20, CPE 21, Network Management System 22, telephone terminal 23, calculates Machine 24, public switched telephone network 25.CPE 21 includes user terminal Transmit-Receive Unit 211 and separation/integrator 212, in uplink method, User terminal Transmit-Receive Unit 211 receives the signal from computer 24 and carries out coded modulation processing to the signal received, will locate DSL signal after reason is sent to separation/integrator 212；Separation/integrator 212 is by the DSL from user terminal Transmit-Receive Unit 211 The POTS signal of signal and telephone terminal 23 carries out integration processing；Signal after integration passes through the transmission of the UTP 26 of multichannel, by Separation/integrator 201 in DSLAM 20 receives；Separation/integrator 201 separates received signal, will be therein POTS signal is sent to public switched telephone network (Public Switched Telephone Network, PSTN) 25, and by its In DSL signal be sent to the local side Transmit-Receive Unit 202 of DSLAM 20；Local side Transmit-Receive Unit 202 solves the signal received Metropolitan Area Network (MAN) is sent after adjusting decoding process；Network Management System (Network Management System, NMS) 22 is used for whole A system and network are managed.In the down direction of signal, then signal is transmitted according to sequence contrary to the above.
In order to further excavate the bandwidth potential of existing copper wire, now begin to consider using FTTC/FTTM technology and The comprehensive of CuTTB technology uses, i.e. the DSLAM of the side FTTC/FTTM and is carried out between the DPU of the position CuTTB using copper wire Data back.In this case, the DSLAM 20 in Fig. 2 passes through optical access network management system 22.DSLAM 20 and CPE 21 Between be also connected with DPU, and be copper wire connection.
In the prior art, the stream compression got from network server is changed to the quasi- letter of multichannel low bandwidth submodule by DSLAM Number stream, and the sub- analog signal flow of multichannel low bandwidth is sent to DPU；DPU is receiving the sub- analog signal flow of multichannel low bandwidth Afterwards, it needs to parse the sub- analog signal flow of multichannel low bandwidth, analog-to-digital conversion, the processing such as modulation, it is high all the way to generate Band data stream, to send the high-bandwidth data stream to the CPE connecting with the DPU.DPU needs a large amount of DSP unit ability Parsing and modulated signal stream.But the presence of a large amount of DSP unit can improve the power consumption of DPU, make the volume of DPU it is larger, Higher cost, power supply and installation are all extremely difficult.
In view of the above-mentioned problems, the embodiment of the present application provides a kind of communication means.According to the topological structure of network shown in fig. 1 And the big rule of small, high-frequency signal the decaying of decaying of DSL low frequency signal under long distance transmission, due to DSLAM to DPU it Between there are a plurality of route, but high frequency attenuation is larger farther out for distance, and only low frequency can be used to transmit data, and between DPU to CPE An only route, small apart from short high frequency attenuation, this section of route usable frequency bandwidth is very big, provided by the embodiments of the present application logical The thought of letter method are as follows: the big bandwidth signal flow point of DSLAM is cut into the subsignal stream of the small bandwidth of multiple low frequencies, and by a plurality of Line transmission is to DPU, and then, DPU will receive the signal stream combining of the small bandwidth of multiple low frequencies into the letter of a big bandwidth of high frequency Number stream, and CPE is sent to by shorter route of registering one's residence, so that it is big to realize that FTTC/FTTM transmits gigabit to user at a distance The demand of bandwidth.Specifically, the communication means, the function that DSP unit in DPU is realized is moved in DSLAM, so that DPU is only Retain the processing module of analog signal, thus the volume and cost that reduce the power consumption of DPU, reduce DPU.Further, since DPU is only protected The processing module of analog signal is stayed, therefore, the delay of data processing can also decline.In this way, DSLAM is getting the first data After stream, which is changed to n (n >=2) way analog signal flow, and send the n way analog signal to DPU Stream；Correspondingly, n way analog signal flow combining is the first mould after receiving the n way analog signal flow by DPU Quasi- signal stream, and first analog signal flow is sent at least one CPE by DSL.
Communication means provided by the embodiments of the present application is suitable for communication system, the framework of the communication system such as Fig. 1 or Fig. 2 institute Show." function that DSP unit in DPU is realized is moved in DSLAM, so that DPU only retains analog signal in conjunction with being described above For processing module " it is found that in the communication system that the embodiment of the present application is applicable in, DSP is not present in DPU, only remains with analog signal Processing module.DSLAM has the function of the DSP unit of DPU in the prior art.
It should be noted that communication means provided by the embodiments of the present application is applied also for, there are bandwidth or frequency band to become The wireless communication system of change, such as: global system for mobile telecommunications (Global Systemof Mobile communication, GSM) System, CDMA (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), long term evolution (Long TermEvolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, is led to LTE time division duplex (Time Division Duplex, TDD) With mobile communication system (Universal Mobile Telecommunication System, UMTS) or global interconnection microwave Access (Worldwide Interoperability for Microwave Access, WiMAX) communication system etc..
Evolved base station (evolved Node Base Station, eNB) phase by taking LTE system as an example, in LTE system When in above-mentioned DSLAM, relay node is equivalent to above-mentioned DPU, terminal is equivalent to above-mentioned CPE.
From above-mentioned Fig. 1 or above-mentioned Fig. 2 shows communication system unlike, between LTE system eNB and relay node be nothing Line communication is also wireless communication between relay node and terminal.And above-mentioned Fig. 1 or Fig. 2 shows communication system in, DSLAM with It is wire communication between DPU, is also wire communication between DPU and CPE.
For ease of description, the embodiment of the present application subsequent content is illustrated by taking communication system shown in fig. 1 as an example.
Specifically, referring to Fig. 3, Fig. 3 is the flow diagram of communication means provided by the embodiments of the present application.
As shown in figure 3, the communication means includes:
S300, DSLAM obtain the first data flow.
Specifically, DSLAM obtains the first data flow from network server.
First stream compression is changed to n way analog signal flow by S301, DSLAM.
DSLAM is changed to n way analog signal flow after getting the first data flow, by first stream compression, in order to During sending to DPU, the bandwidth of DSL can be well adapted to.
It is easily understood that bandwidth of the bandwidth of each way analog signal flow less than the first data flow.Optionally, the road n The bandwidth of each way analog signal flow is all the same in sub- analog signal flow, alternatively, the part submodule in n way analog signal flow The bandwidth of quasi- signal stream is identical, alternatively, the bandwidth of all sub- analog signal flows in n way analog signal flow is different, this Shen Please embodiment this is not especially limited.
Specifically, the first stream compression can be changed to n way analog signal flow using following either types by DSLAM:
Mode one: DSLAM carries out constellation mapping to the first data flow, to obtain the first digital frequency-domain stream；Then, should DSLAM carries out serioparallel exchange to the first digital frequency-domain stream, to obtain the road n the first sub-figure frequency-region signal stream；Finally, should DSLAM carries out precoding processing, modulation treatment and digital-to-analogue conversion to the road n the first sub-figure frequency-region signal stream, to obtain n way Analog signal flow.
Mode two: DSLAM carries out constellation mapping and precoding processing to the first data flow, to obtain the second digital frequency domain Signal stream；Then, which carries out serioparallel exchange to the second digital frequency-domain stream, to obtain the road n the second sub-figure frequency domain letter Number stream；Finally, the DSLAM carries out modulation treatment and digital-to-analogue conversion to the road n the second sub-figure frequency-region signal stream, to obtain the road n Sub- analog signal flow.
Mode three: DSLAM carries out constellation mapping, precoding processing and modulation treatment to the first data flow, to obtain the One digital time domain signal stream；Then, which carries out serioparallel exchange to the first digital time domain signal stream, to obtain the first son of the road n Digital time domain signal stream；Finally, DSLAM carries out digital-to-analogue conversion to the road n the first sub-figure time-domain signal stream, to obtain n way mould Quasi- signal stream.
Mode four: DSLAM carries out constellation mapping, precoding processing, modulation treatment and digital-to-analogue conversion to the first data flow, To obtain the second analog signal flow；Then, which carries out serioparallel exchange to the second analog signal flow, to obtain the simulation of n way Signal stream.
As can be seen that DSLAM carries out constellation mapping, precoding to the first data flow in one~mode of aforesaid way four Processing, modulation treatment and digital-to-analogue conversion.The difference of one~mode of aforesaid way four is: the position of DSLAM progress serioparallel exchange It sets.
The first stream compression is now changed to using aforesaid way one by n way analog signal flow with DSLAM, the first data flow Bandwidth is 424 megahertzs (MHz), and the first data flow is 8192 using the sub-carrier number of resource, each way analog signal flow Bandwidth be 106MHz, and sub- analog signal flow is 2048 using the sub-carrier number of resource, and the first data flow uses resource Subcarrier spacing is identical using the subcarrier spacing of resource as sub- analog signal flow, illustrates DSLAM by the first data for n=4 Circulation is changed to the process of n way analog signal flow.
As shown in figure 4, the first digital frequency-domain stream is obtained after the first data flow is carried out constellation mapping by DSLAM, it should First digital frequency-domain stream occupies 8192 carrier waves；The DSLAM will occupy the first digital frequency-domain stream of 8192 carrier waves, Serioparallel exchange (here by taking equal interval sampling as an example) generates 4 tunnel the first sub-figure frequency-region signal streams, such as: 1:4:8189 is (from the 1 carrier wave starts, and is interval sampling with 4, until the 8189th carrier wave) data of carrier wave are the first via " the first sub-figure frequency domain The data of signal stream ", 2:4:8190 (being interval sampling with 4 since the 2nd carrier wave, until the 8190th carrier wave) carrier wave are Second tunnel " the first sub-figure frequency-region signal stream ", 3:4:8191 (is interval sampling, Zhi Dao with 4 since the 3rd carrier wave 8191 carrier waves) carrier wave data be third road " the first sub-figure frequency-region signal stream ", 4:4:8192 (since the 4th carrier wave, It is interval sampling with 4, until the 8192nd carrier wave) data of carrier wave are the 4th tunnel " the first sub-figure frequency-region signal stream "；It should DSLAM carries out precoding processing, modulation treatment and digital-to-analogue (Digital to 4 tunnel the first sub-figure frequency-region signal streams Analog, D/A) conversion, to obtain 4 way analog signal flows.In this way, the DSLAM can drive (Line by route Driver, LD), Hybrid circuit sends the 4 way analog signal flow on DSL.
Optionally, DSLAM can also will occupy the first digital frequency-domain stream of 8192 carrier waves, and continuous sampling generates 4 Road the first sub-figure frequency-region signal stream, such as: the data of the 1st carrier wave~2048th carrier wave are the first via " the first sub-figure Frequency-region signal stream ", the data of the 2049th carrier wave~4096th carrier wave are the second tunnel " the first sub-figure frequency-region signal stream ", the The data of 4097 carrier wave~6144th carrier waves are third road " the first sub-figure frequency-region signal stream ", the 6145th carrier wave~the The data of 8192 carrier waves are the 4th tunnel " the first sub-figure frequency-region signal stream ".
In aforesaid way two, mode three and mode four, the process that DSLAM carries out serioparallel exchange can refer to above-mentioned DSLAM carries out the process of serioparallel exchange in mode one, is no longer described one by one herein.
S302, DSLAM send n way analog signal flow to DPU by DSL.
S302 ', DSLAM send the first configuration signal to DPU, send the second configuration signal to CPE.
The first configuration signal is used to indicate DPU configuration and the first stream compression is being changed to n way analog signal by DSLAM The corresponding combining parameter of the branch parameter used during stream.Here, branch parameter is DSLAM by the first data stream Used parameter during for n way analog signal flow.Such as: the mode of serioparallel exchange, the interval of equal interval sampling are long Degree or the sampling length of continuous sampling etc..
Optionally, the first configuration signal may include above-mentioned branch parameter, in this way, DPU is getting the first configuration signal Afterwards, combining parameter corresponding with the branch parameter is configured.First configuration signal can also be only an indication signal, such as: Be pre-configured with combining parameter and branch parameter in communication system, DSLAM according to preconfigured branch parameter by first Stream compression is changed to n way analog signal flow, then sends the first configuration signal to DPU, and DPU is getting this first with confidence After number, according to its internal module of preconfigured combining parameter configuration.
The second configuration signal is used to indicate CPE configuration and the first stream compression is being changed to n way analog signal by DSLAM The corresponding processing parameter of branch parameter used during stream.
Optionally, the second configuration signal may include above-mentioned branch parameter, in this way, CPE is getting the second configuration signal Afterwards, processing parameter corresponding with the branch parameter is configured.Second configuration signal can also be only an indication signal, such as: Be pre-configured with processing parameter and branch parameter in communication system, DSLAM according to preconfigured branch parameter by first Stream compression is changed to n way analog signal flow, then sends the second configuration signal to CPE, and CPE is getting this second with confidence After number, its internal module is configured according to preconfigured processing parameter.
It is easily understood that DSLAM is also to DPU and CPE tranmitting data register synchronization signal, in order to which DPU and CPE is carried out Sampling/modulating/demodulating is synchronous.
S303, DPU are according to the first configuration signal, configuration combining parameter.
The combining parameter can be modulation parameter, serioparallel exchange mode etc..
The combining of n way analog signal flow is the first analog signal flow by S304, DPU.
Demand due to CPE to high bandwidth, DPU is after the sub- analog signal flow for receiving the road n low bandwidth, by the road n Analog signal flow combining is the first analog signal flow of high bandwidth.
Wherein, due to the influence of the factors such as noise, the sum of bandwidth of n way analog signal flow is less than or equal to the first simulation The bandwidth of signal stream.
Specifically, DPU can use following either types that n way analog signal flow is combined as the first analog signal flow:
Mode a:DPU carries out over-sampling to each way analog signal flow in n way analog signal flow, and by all mistakes Sub- analog signal flow combining after sampling, to generate the first analog signal flow.
Here, above-mentioned " over-sampling " can be quadrature sampling, or interpolation sampling, the embodiment of the present application do not make this It is specific to limit.
In order to make it easy to understand, the embodiment of the present application is that the orthogonal example that is sampled as is illustrated with " over-sampling ".
Specifically, DPU carries out quadrature sampling to each way analog signal in n way analog signal flow, to obtain the road n Sub- analog signal flow after quadrature sampling；Then, which is combined the sub- analog signal flow after the quadrature sampling of the road n, to generate the One analog signal flow.Wherein, the bandwidth and the bandwidth of the first analog signal flow per the sub- analog signal flow after quadrature sampling all the way It is identical.Such as: the bandwidth of each way analog signal flow is 106MHz, and the bandwidth of the first analog signal flow is 424MHz, then often The bandwidth of the sub- analog signal flow after quadrature sampling is also 424MHz all the way.
Here, DPU can complete the processing of mode a using combiner or multiplexer (MUX).
Illustratively, multiple using the signal in combiner S as shown in figure 5, DPU is after receiving 4 way analog signal flows By the combining of 4 way analog signal flows be the first analog signal flow with device 50, and connect different switches 51 in different time-gap, with to Different CPE send first analog signal flow.
The working principle of signal multiplexer 50 is shown in conjunction with Fig. 5, Fig. 6.As shown in fig. 6, signal multiplexer 50 is receiving To after 4 way analog signal flows, by the orthogonal CDMA of multichannel (Code Division Multiple Access, CDMA) multiplier 500 is sampled, and is then combined using adder 501 to the sub- analog signal flow after 4 road quadrature samplings, raw At the first analog signal flow.
Mode b:DPU carries out orthogonal modulation to n way analog signal flow, to generate the first analog signal flow.
Optionally, DPU can carry out multi-Level Orthogonal modulation to n way analog signal flow using multiple quadrature modulators, with Generate the first analog signal flow；Level-one orthogonal modulation can also be carried out to n way analog signal flow using multiple quadrature modulators, And all modulated signal streams are combined using combiner；It can also be using multiple quadrature modulators to n way analog signal Stream carries out multi-Level Orthogonal modulation, and is combined using multiple combiners to signal stream, and the embodiment of the present application is not especially limited this.
It is illustrated by taking following several specific implementations as an example now.
Mode b1: in n=2K, in the case where K >=1, DPU uses n-1 quadrature modulator, to n way analog signal flow K grades of orthogonal modulations are carried out, to generate the first analog signal flow；Wherein, in the i-stage quadrature modulation process of K grades of orthogonal modulations, DPU uses 2K-iA quadrature modulator, to 2K-i+1Road signal stream to be modulated carries out orthogonal modulation, obtains 2K-iRoad modulated signal stream, i ∈ 1 ..., K }；Wherein, the signal stream to be modulated of the 1st grade of orthogonal modulation is sub- analog signal flow, and K grades of orthogonal modulations obtain The modulated signal stream arrived is the first analog signal flow.
In general, quadrature modulator is to carry out orthogonal modulation to two-way signal stream to be modulated.Therefore, above-mentioned " orthogonal at K grades In the i-stage quadrature modulation process of modulation, DPU uses 2K-iA quadrature modulator, to 2K-i+1Road signal stream to be modulated carries out orthogonal Modulation " refers to 2K-iEach quadrature modulator in a quadrature modulator carries out orthogonal modulation to two-way signal stream to be modulated, arbitrarily The signal to be modulated of two quadrature modulators modulation is different.
In the embodiment of the present application, above-mentioned 2K-iThe modulating frequency that all quadrature modulators in a quadrature modulator use is not Together.
Illustratively, as shown in fig. 7, if n=22=4, DPU use 3 quadrature modulators, to 4 way analog signals into 2 grades of orthogonal modulations of row, to generate the first analog signal flow.During the 1st grade of orthogonal modulation, DPU uses 2 orthogonal modulations Device is modulated 4 way analog signal flows.During the 2nd grade of orthogonal modulation, DPU uses 1 quadrature modulator, to 2 Road signal stream to be modulated is modulated, to generate the first analog signal flow.
Specifically, the 4 way analog signal flows received are divided into two groups by DPU, it is quasi- with sub- analog signal flow 1 and submodule Signal stream 2 is first group of signal stream, and sub- analog signal flow 3 and sub- analog signal flow 4 are orthogonal modulation for second group of signal stream Device 70 is modulated first group of signal stream using modulating frequency 106MHz, the frequency range 0 of modulated first group of signal stream ~212MHz；Quadrature modulator 71 is modulated second group of signal stream using modulating frequency 356MHz, and modulated second group 250~462MHz of frequency range of signal stream；Quadrature modulator 72 believes the output of quadrature modulator 70 and quadrature modulator 71 Number carry out orthogonal modulation, obtain the first analog signal flow.
Optionally, K grades of all quadrature modulators can be replaced using combiner in mode b1, in this case, combining The output signal of K-1 grades of all quadrature modulators can be directly combined by device, to generate the first analog signal flow.
In conjunction with above-mentioned Fig. 7, as shown in figure 8, the quadrature modulator 72 in Fig. 7 could alternatively be combiner 80.
Mode b2: in n=2M(2p+1), M >=1, in the case where p >=0, DPU is usedIt is a Quadrature modulator carries out M grades of orthogonal modulations to n way analog signal flow, obtains the road 2p+1 modulated signal；The road 2p+1 is modulated and is believed Number combining, to generate the first analog signal flow；Wherein, in the j-th stage quadrature modulation process of M grades of orthogonal modulations, DPU is used (2p+1)·2M-jA quadrature modulator, to (2p+1) 2M-j+1Road signal stream to be modulated carries out orthogonal modulation, obtains (2p+1) 2M-jRoad modulated signal stream, j ∈ 1 ..., and M }, the signal stream to be modulated of the 1st grade of orthogonal modulation is sub- analog signal flow.
Quadrature modulator in mode b2 is similar with the effect of quadrature modulator in aforesaid way b1, no longer carries out herein It is described in detail.
Illustratively, as shown in figure 9, if n=22(2+1)=12, DPU uses 9 quadrature modulators, to 12 way moulds Quasi- signal carries out 2 grades of orthogonal modulations, obtains 3 tunnel modulated signals；Then, which is combined 3 tunnel modulated signals, to generate first Analog signal flow.During the 1st grade of orthogonal modulation, DPU uses 6 quadrature modulators, flows into 12 way analog signals Row modulation.During the 2nd grade of orthogonal modulation, DPU uses 3 quadrature modulators, adjusts to 6 tunnels signal stream to be modulated System, to obtain 3 tunnel modulated signals.DPU uses combiner, and 3 tunnel modulated signal is combined, to generate the first simulation letter Number stream.
Specifically, the 12 way analog signal flows received are divided into one group by DPU two-by-two, it is divided into six groups of signals altogether Stream, such as: sub- analog signal flow 1 and sub- analog signal flow 2 are first group of signal stream, sub- analog signal flow 3 and sub- analog signal Stream 4 is second group of signal stream ... ....Quadrature modulator 90, quadrature modulator 91, quadrature modulator 92, quadrature modulator 93, just Quadrature modulator 94 and quadrature modulator 95 carry out orthogonal modulation to one group of signal stream respectively, generate 6 tunnel modulated signals, and described 6 Road modulated signal is signal to be modulated for quadrature modulator 96, quadrature modulator 97 and quadrature modulator 98；It will 6 tunnels signal stream to be modulated is divided into one group two-by-two, is divided into three groups of signal streams altogether, quadrature modulator 96, quadrature modulator 97 with And quadrature modulator 98 carries out orthogonal modulation to one group of signal stream respectively, generates 3 tunnel modulated signals；Combiner 99 is to orthogonal modulation The 3 tunnel modulated signals that device 96, quadrature modulator 97 and quadrature modulator 98 export are combined, to generate the first analog signal Stream.
Optionally, the combiner in mode b2 can be using p+1 quadrature modulator replacement.Illustratively, in conjunction with Fig. 9, As shown in Figure 10, quadrature modulator 100 carries out orthogonal modulation to the output signal of quadrature modulator 96 and quadrature modulator 97, Quadrature modulator 101 carries out orthogonal modulation to the output signal of quadrature modulator 100 and quadrature modulator 98, to generate first Analog signal flow.As can be seen that the combiner 99 in Fig. 9 can use the quadrature modulator 100 and quadrature modulator in Figure 10 101 replacements.
In addition, the DPU in the embodiment of the present application can also use m (2≤m < n) a combiner by n way analog signal flow It is combined, to obtain m analog signal flow, then the m analog signal is flowed into using at least one quadrature modulator Row orthogonal modulation, to generate the first analog signal flow.
Mode b3: in n=2M(2p+2), M >=1, in the case where p >=0, DPU uses 2M-1(2p+2) a orthogonal modulation Device carries out orthogonal modulation to n way analog signal flow, obtains 2M-1The road (2p+2) modulated signal；By 2M-1The road (2p+2) tune Signal combining processed, to generate the first analog signal flow.
Wherein, 2M-1The modulating frequency that all quadrature modulators in (2p+2) a quadrature modulator use is different.
It should be noted that above-mentioned example is only to " combining of n way analog signal flow is the first analog signal by DPU Stream " for example, DPU can also use other modes by the combining of n way analog signal flow for first in the embodiment of the present application Analog signal flow.Here it no longer illustrates one by one.
Optionally, each way can also be simulated by amplifier and be believed after receiving n way analog signal flow by DPU Number banish it is big, in this way, all amplified sub- analog signal flows combinings are the first analog signal flow by the DPU.
S305, DPU send the first analog signal flow at least one CPE by DSL.
In practical application, DPU can send the first analog signal to different CPE in different moments according to the demand of CPE Stream can also send the first analog signal flow by part CPE of the selector switch/power splitter at least one CPE simultaneously.
Specifically, in conjunction with above-mentioned Fig. 5 or Fig. 6, CPU is according to the instruction of preconfigured switch 51, by the first analog signal It is sent on corresponding route, CPE is sent to by the LD of the route.
After DPU sends the first analog signal flow at least one CPE, for receiving each of first analog signal flow For CPE, the process for handling the first analog signal flow is all the same.
For ease of description, the embodiment of the present application illustrates that CPE handles the mistake of the first analog signal flow by taking a CPE as an example Journey.
S306, CPE configure processing parameter according to the second configuration signal.
The processing parameter can be demodulation parameter, branch parameter etc..
Optionally, after receiving the second configuration signal, i.e., configurable processing parameter executes CPE that is, after S302 ' S306。
First analog signal flow is converted to the first data flow by S307, CPE.
CPE is converted to the first data flow after receiving the first analog signal flow, by first analog signal flow, in order to Terminal to connect with the CPE provides service.
Specifically, following either types, which can be used, in CPE is converted to the first data flow for the first analog signal flow:
Mode I:CPE carries out serioparallel exchange to the first analog signal flow, to obtain n way analog signal flow；Then, should CPE carries out analog-to-digital conversion and demodulation process to n way analog signal flow, to obtain the road n third sub-figure frequency-region signal stream；Most Afterwards, which is combined the road n third sub-figure frequency-region signal stream, and planetary demapping of going forward side by side obtains the first data flow.
Mode II:CPE carries out analog-to-digital conversion to the first analog signal flow, to obtain the second digital time domain signal stream；Then, The CPE carries out serioparallel exchange to the second digital time domain signal stream, in turn, should to obtain the road n the second sub-figure time-domain signal stream CPE carries out demodulation process to the road n the second sub-figure time-domain signal stream, to obtain the 4th sub-figure frequency-region signal stream of the road n；Finally, The 4th sub-figure frequency-region signal stream of the road n is combined by the CPE, and planetary demapping of going forward side by side obtains the first data flow.
Mode III:CPE carries out analog-to-digital conversion and demodulation process to the first analog signal flow, to obtain third digital frequency domain Signal stream；Then, which carries out serioparallel exchange to third digital frequency-domain stream, to obtain the 5th sub-figure frequency domain of the road n letter Number stream；Finally, the 5th sub-figure frequency-region signal stream of the road n is combined by the CPE, planetary demapping of going forward side by side obtains the first data flow.
As can be seen that equal first analog signal flow of CPE carries out analog-to-digital conversion, demodulation in aforesaid way I~mode III Processing and constellation demapping.Aforesaid way I~mode III difference is: the position of CPE progress serioparallel exchange.
In conclusion the treatment process of " the first analog signal flow is converted to the first data flow by CPE " can be regarded simply To be opposite with the treatment process of " the first stream compression is changed to n way analog signal flow by DSLAM ".
Optionally, CPE can realize serioparallel exchange using splitter, can also be real using one or more levels quadrature demodulator Existing serioparallel exchange can also realize jointly serioparallel exchange, the embodiment of the present application pair using splitter and multi-Level Orthogonal demodulator This is not especially limited.
The first analog signal flow is now converted to using aforesaid way I by the first data flow, n=4, the first simulation letter with CPE Number stream be two-band signal stream for illustrate that the first analog signal flow is converted to the process of the first data flow by CPE.
In one example, as shown in figure 11, CPE is after receiving the first analog signal flow, and splitter 110 is by the first mould Quasi- signal stream branch is the first signal stream that frequency range is 0~212MHz and frequency range is the second of 250~462MHz Signal stream.Quadrature demodulator 111 demodulates the first signal stream, generates sub- analog signal flow 1 and sub- analog signal flow 2.Just It hands over demodulator 112 to demodulate second signal stream, generates sub- analog signal flow 3 and sub- analog signal flow 4.It is subsequent, modulus (Analog to Digital, A/D) converter 113 and modulator 114 carry out analog-to-digital conversion to each sub- analog signal flow respectively And demodulation process, to obtain 4 tunnel third sub-figure frequency-region signal streams；Combiner 115 is by the 4 tunnel third sub-figure frequency-region signal Stream combining is digital frequency-domain stream all the way, is reflected in this way, flowing into planetary solution in the digital frequency-domain generated to combiner 115 It penetrates, the first data flow can be obtained.
Above-mentioned sub- analog signal flow 1 can be corresponding with the data of 1:4:8189 carrier wave in embodiment illustrated in fig. 4, similarly, Above-mentioned sub- analog signal flow 2 can be corresponding with the data of 2:4:8190 carrier wave in embodiment illustrated in fig. 4, above-mentioned sub- analog signal Stream 3 can be corresponding with the data of 3:4:8191 carrier wave in embodiment illustrated in fig. 4, and above-mentioned sub- analog signal flow 4 can be with Fig. 4 institute Show that the data of the 4:4:8192 carrier wave in embodiment are corresponding.
In another example, in conjunction with Figure 11, as shown in figure 12, the splitter 110 in Figure 11 could alternatively be orthogonal solution Adjust device 120.
In aforesaid way II and mode III, the process that CPE carries out serioparallel exchange can be with reference to above-mentioned CPE in mode I The process for carrying out serioparallel exchange, is no longer described one by one herein.
In order to be more fully understood from communication means provided by the present application, presently in connection with the inside of DSLAM, DPU and CPE The transmission method of downlink data in the application is described in module/device.Specifically, with n=4, aforesaid way one, mode I For be illustrated.
In conjunction with above-mentioned Fig. 4 and Fig. 5, as shown in figure 13, DSLAM 130 includes constellation mapping block 1300, serioparallel exchange Module 1301, precoder 1302, modulator 1303, D/A converter 1304, LD 1305 and Hybrid circuit 1306；DPU 131 include the first Hybrid circuit 1310, low-noise amplifier (Low Noise Amplifier, LNA) 1311, combiner/multiple With device 1312, LD 1313 and the 2nd Hybrid circuit 1314；CPE 132 includes splitter/demultiplexer 1320, A/D conversion Device 1321, demodulator 1322, combiner 1323 and solution constellation mapping block 1324.Wherein, LD is used for the transmission of driving data, Hybrid circuit is for distinguishing upstream data and downlink data.
Specifically, constellation mapping block 1300 carries out constellation mapping to the first data flow, to obtain the first digital frequency domain letter Number stream；Serioparallel exchange module 1301 carries out serioparallel exchange to the first digital frequency-domain stream, to obtain 4 tunnel the first sub-figure frequency domains Signal stream (this process can refer to above-mentioned Fig. 4), 4 tunnel the first sub-figure frequency-region signal stream are respectively as follows: 1:4:8189 carrier wave Data, the data of 2:4:8190 carrier wave, the data of 3:4:8191 carrier wave, the data of 4:4:8192 carrier wave；Precoder 1302 is adjusted Device 1303 and D/A converter 1304 processed are respectively successively handled each way digital frequency-domain stream, to obtain the simulation of 4 ways Signal stream；Each way analog signal flow in this 4 way analog signal flow passes through LD 1305 and Hybrid circuit 1306 It is sent to DPU 131.The first Hybrid circuit 1310 in DPU 131 is received after receiving 4 way analog signal flows To 4 way analog signals flow to LNA 1311 send, the noise of sub- analog signal flow is removed convenient for LNA 1311；After denoising 4 way analog signal flows by combiner/multiplexer 1312 combining be the first analog signal flow (this process can refer to above-mentioned Fig. 5, Fig. 7 or Fig. 8), combiner/multiplexer 1312 can be via different LD 1313 and the 2nd Hybrid circuit 1314 to different CPE 132 sends the first analog signal flow.The first simulation that splitter/demultiplexer 1320 in CPE 132 receives device Signal stream carries out serioparallel exchange, to obtain n way analog signal flow (this process can refer to above-mentioned Figure 11 or Figure 12)；A/D turns Parallel operation 1321 and demodulator 1322 are respectively successively handled each way analog signal flow, to obtain the road n third sub-figure frequency Domain signal stream；The road n third sub-figure frequency-region signal stream is combined by combiner 1323, solves constellation mapping block 1324 to combiner 1323 output signal carries out constellation demapping, obtains the first data flow.
In the case where the numerical value of n does not limit, combiner/multiplexer 1312 in Figure 13 may include the conjunction in Fig. 5 Road device S and switch 51, also may include quadrature modulator 70, quadrature modulator 71 and the quadrature modulator 72 in Fig. 7, may be used also It can also include the 90~quadrature modulator of quadrature modulator 98 and combiner in Fig. 9 to include the combiner 80 in Fig. 8 99, it can also include 100~quadrature modulator of 90~quadrature modulator of quadrature modulator 98 and quadrature modulator in Figure 10 101.Splitter/demultiplexer 1320 in Figure 13 may include splitter 110 in Figure 11, quadrature demodulator 111 and just Demodulator 112 is handed over, also may include quadrature demodulator 120, quadrature demodulator 111 and quadrature demodulator 112.The application is implemented Example is not especially limited this.
Each attached drawing in above-mentioned Fig. 3~Figure 13 is used to indicate the transmission process of downlink data.It is easily understood that right For upstream data, the treatment process of each equipment is opposite with the processing of downlink data.No matter in which equipment, if under There are combiners in row data transmission procedure, then there are splitters during transmitting uplink data, wherein combiner and branch Device can be different equipment, or same equipment.Similarly, if there are multiplexer during downlink data transmission, There are demultiplexers during transmitting uplink data, wherein multiplexer and demultiplexer can be different equipment, or Same equipment.If during downlink data transmission, there are modulators, there are demodulator during transmitting uplink data, In, modulator and demodulator can be different equipment, or same equipment.If existing during downlink data transmission A/D converter, then there are D/A converters during transmitting uplink data, wherein A/D converter and D/A converter can be Different equipment, or same equipment.
Illustratively, in conjunction with above-mentioned Fig. 5, during downlink data transmission, subsignal is simulated using combiner S in the road n by DPU Stream combining is the first analog signal flow, and combiner S includes signal multiplexer 50 and switch 51, the work of the signal multiplexer 50 Principle is as shown in figure 6 above.Corresponding, as shown in figure 14, during transmitting uplink data, DPU includes splitter S ', the branch Device S ' includes signal demultiplexer 140 and switch 141.Signal demultiplexer 140 is receiving what the switch 141 having been turned on was sent After first analog signal flow, which is decomposed into n way analog signal flow.Figure 15 shows signal demultiplexing The working principle of device 140.As shown in figure 14, signal demultiplexer 140 is in the first mould for receiving the transmission of switch 141 having been turned on After quasi- signal stream, inverse sampling is carried out by the orthogonal CDMA multiplier 140 of multichannel, then, extracts useful signal, to complete string simultaneously Conversion.The combiner S in splitter S ' and Fig. 5 in Figure 14 can integrate in same equipment, or be independently arranged.
In conclusion DPU only remains the processing module of analog signal in communication means provided by the embodiments of the present application, Compared with prior art, the volume and cost for effectively reducing the power consumption of DPU, reducing DPU.Further, since DPU only retains The processing module of analog signal, therefore, the delay of data processing can also decline.
The embodiment of the present application provides a kind of DPU 160, and the DPU which is used to execute in the above communication means is held Capable step.DPU 160 provided by the embodiments of the present application may include module corresponding to corresponding steps.
The embodiment of the present application can carry out the division of functional module according to above method example to DPU 160, for example, can be with Two or more functions, can also be integrated in a processing module by corresponding each each functional module of function division In.Above-mentioned integrated module both can take the form of hardware realization, can also be realized in the form of software function module.This It is schematical, only a kind of logical function partition to the division of module in application embodiment, can has in actual implementation another Outer division mode.
In the case where each function division of use correspondence each functional module, Figure 16 shows a kind of possibility of DPU 160 Structural schematic diagram.As shown in figure 16, DPU 160 includes receiving unit 1600, combiner unit 1601, transmission unit 1602, matches Set unit 1603 and sampling unit 1604.Receiving unit 1600 is for supporting the DPU 160 to execute in above-described embodiment S302, S302 ', and/or other processes for techniques described herein；Combiner unit 1601 is for supporting the DPU 160 Execute the S304 in above-described embodiment, and/or other processes for techniques described herein；Transmission unit 1602 is for branch It holds the DPU 160 and executes S305, and/or other processes for techniques described herein；Configuration unit 1603 is for supporting The DPU 160 executes S303, and/or other processes for techniques described herein；Sampling unit 1604 is for supporting this DPU 160 executes " carrying out quadrature sampling to each way analog signal flow in n way analog signal flow ", and/or for this Other processes of technology described in text.Certainly, DPU 160 provided by the embodiments of the present application includes but is not limited to above-mentioned module, Such as DPU 160 can also include storage unit.Storage unit can be used for storing the program code of the DPU 160.Wherein, on All related contents for stating each step that embodiment of the method is related to can quote the function description of corresponding function module, herein It repeats no more.
When DPU 160 is run, the step of which executes DPU in the communication means of embodiment as shown in Figure 3.
Another embodiment of the application also provides a kind of computer readable storage medium, deposits in the computer readable storage medium Instruction is contained, when instruction is run on DPU, the step of which executes DPU in the communication means of embodiment as shown in Figure 3.
In another embodiment of the application, a kind of computer program product is also provided, which includes Computer executed instructions, the computer executed instructions store in a computer-readable storage medium；At least one processor of DPU The computer executed instructions can be read from computer readable storage medium, at least one processor executes computer execution and refers to It enables so that DPU implements the step of executing the DPU in communication means shown in Fig. 3.
The embodiment of the present application provides a kind of DSLAM 170, and the DSLAM 170 is for executing in the above communication means Step performed by DSLAM.DSLAM 170 provided by the embodiments of the present application may include module corresponding to corresponding steps.
The embodiment of the present application can carry out the division of functional module according to above method example to DSLAM 170, for example, can With each functional module of each function division of correspondence, two or more functions can also be integrated in a processing module In.Above-mentioned integrated module both can take the form of hardware realization, can also be realized in the form of software function module.This It is schematical, only a kind of logical function partition to the division of module in application embodiment, can has in actual implementation another Outer division mode.
In the case where each function division of use correspondence each functional module, one kind that Figure 17 shows DSLAM 170 can The structural schematic diagram of energy.As shown in figure 17, DSLAM 170 includes acquiring unit 1700, converting unit 1701 and transmission unit 1702.The S300 that acquiring unit 1700 is used to that the DSLAM 170 to be supported to execute in above-described embodiment, and/or retouched for this paper The other processes for the technology stated；The S301 that converting unit 1701 is used to that the DSLAM 170 to be supported to execute in above-described embodiment, and/ Or other processes for techniques described herein；Transmission unit 1702 for support the DSLAM 170 execute S302, S302 ', and/or other processes for techniques described herein.Certainly, DSLAM 170 provided by the embodiments of the present application is wrapped Above-mentioned module is included but is not limited to, such as DSLAM 170 can also include storage unit.Storage unit can be used for storing should The program code of DSLAM 170.Wherein, all related contents for each step that above method embodiment is related to can be quoted The function of corresponding function module describes, and details are not described herein.
When DSLAM 170 is run, which executes DSLAM in the communication means of embodiment as shown in Figure 3 Step.
Another embodiment of the application also provides a kind of computer readable storage medium, deposits in the computer readable storage medium Instruction is contained, when instruction is run on DSLAM, which executes DSLAM in the communication means of embodiment as shown in Figure 3 The step of.
In another embodiment of the application, a kind of computer program product is also provided, which includes Computer executed instructions, the computer executed instructions store in a computer-readable storage medium；At least one processing of DSLAM Device can read the computer executed instructions from computer readable storage medium, at least one processor executes computer execution Instruction is so that DSLAM implements the step of executing the DSLAM in communication means shown in Fig. 3.
In the above-described embodiments, all or part of can be come in fact by software, hardware, firmware or any combination thereof It is existing.When being realized using software program, can entirely or partly occur in the form of a computer program product.The computer Program product includes one or more computer instructions.When loading on computers and executing the computer program instructions, entirely Portion is partly generated according to process or function described in the embodiment of the present application.The computer can be general purpose computer, specially With computer, computer network or other programmable devices.The computer instruction can store in computer-readable storage In medium, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the meter Calculation machine instruction can from a web-site, computer, server or data center by it is wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, service Device or data center's transmission.The computer readable storage medium can be any usable medium that computer can access or It is comprising data storage devices such as one or more usable mediums integrated server, data centers.The usable medium can be Magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State Disk (SSD)) etc..
Through the above description of the embodiments, it is apparent to those skilled in the art that, for description It is convenienct and succinct, only the example of the division of the above functional modules, in practical application, can according to need and will be upper It states function distribution to be completed by different functional modules, i.e., the internal structure of device is divided into different functional modules, to complete All or part of function described above.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the module or unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It may be combined or can be integrated into another device, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown can be a physical unit or multiple physical units, it can and it is in one place, or may be distributed over Multiple and different places.Some or all of unit therein can be selected to realize this embodiment scheme according to the actual needs Purpose.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a read/write memory medium.Based on this understanding, the technical solution of the embodiment of the present application is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that an equipment (can be list Piece machine, chip etc.) or processor (processor) execute each embodiment the method for the application all or part of the steps. And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), arbitrary access are deposited The various media that can store program code such as reservoir (Random Access Memory, RAM), magnetic or disk.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Change or replacement within the technical scope of the present application should all be covered within the scope of protection of this application.Therefore, this Shen Protection scope please should be based on the protection scope of the described claims.

Claims (27)

1. a kind of communication means characterized by comprising
Distributed node cells D PU receives the n way analog signal that couple in multiplexer DSLAM is sent by digital user wire DSL First stream compression is changed to the n way analog signal flow and obtained by stream, the n way analog signal flow DSLAM, n≥2；
N way analog signal flow combining is the first analog signal flow by the DPU；
The DPU sends first analog signal flow at least one user front end device CPE by DSL, in order to each First analog signal flow received is converted to first data flow by CPE.
2. communication means according to claim 1, which is characterized in that the communication means further include:
The DPU receives the first configuration signal that the DSLAM is sent, and the first configuration signal is used to indicate the DPU and matches Combining parameter corresponding with branch parameter is set, first stream compression is being changed to institute for the DSLAM by the branch parameter State used parameter during n way analog signal flow；
The DPU configures the combining parameter according to the first configuration signal；
N way analog signal flow combining is the first analog signal flow by the DPU, is specifically included:
The n way analog signal flow is combined according to the combining parameter as first analog signal flow by the DPU.
3. communication means according to claim 1 or 2, which is characterized in that the DPU is by the n way analog signal flow Combining is the first analog signal flow, is specifically included:
The DPU carries out over-sampling to each way analog signal flow in the n way analog signal flow；
Sub- analog signal flow after all over-samplings is combined by the DPU, to generate first analog signal flow.
4. communication means according to claim 3, which is characterized in that the DPU is in the n way analog signal flow Each way analog signal flow carries out over-sampling, specifically includes:
The DPU carries out quadrature sampling to each way analog signal flow in the n way analog signal flow, to obtain the road n Sub- analog signal flow after quadrature sampling；
Sub- analog signal flow after all over-samplings is combined by the DPU, specific to wrap to generate first analog signal flow It includes:
Sub- analog signal flow after the quadrature sampling of the road n is combined by the DPU, to generate first analog signal flow.
5. communication means according to claim 1 or 2, which is characterized in that the DPU is by the n way analog signal flow Combining is the first analog signal flow, is specifically included:
The DPU carries out orthogonal modulation to the n way analog signal flow, to generate first analog signal flow.
6. communication means according to claim 5, which is characterized in that in n=2K, in the case where K >=1, the DPU is by institute Stating the combining of n way analog signal flow is the first analog signal flow, is specifically included:
The DPU uses n-1 quadrature modulator, to n way analog signal flow K grades of orthogonal modulations of progress, to generate the One analog signal flow；Wherein,
In the i-stage quadrature modulation process of the K grades of orthogonal modulation, the DPU uses 2K-iA quadrature modulator, to 2K-i+1 Road signal stream to be modulated carries out orthogonal modulation, obtains 2K-iRoad modulated signal stream, i ∈ 1 ..., K }；
Wherein, the signal stream to be modulated of the 1st grade of orthogonal modulation is the sub- analog signal flow, the tune that K grades of orthogonal modulations obtain Signal stream processed is first analog signal flow.
7. communication means according to claim 5, which is characterized in that in n=2MThe case where (2p+1), M >=1, p >=0 Under, n way analog signal flow combining is the first analog signal flow by the DPU, it specifically includes:
The DPU is usedA quadrature modulator is carrying out M grades just to the n way analog signal flow Intermodulation system obtains the road 2p+1 modulated signal；
The road 2p+1 modulated signal is combined, to generate first analog signal flow；
Wherein, in the j-th stage quadrature modulation process of the M grades of orthogonal modulation, the DPU uses (2p+1) 2M-jIt is a orthogonal Modulator, to (2p+1) 2M-j+1Road signal stream to be modulated carries out orthogonal modulation, obtains (2p+1) 2M-jRoad modulated signal stream, j ∈ 1 ..., and M }, the signal stream to be modulated of the 1st grade of orthogonal modulation is the sub- analog signal flow.
8. communication means according to claim 5, which is characterized in that in n=2MThe case where (2p+2), M >=1, p >=0 Under, n way analog signal flow combining is the first analog signal flow by the DPU, it specifically includes:
The DPU uses 2M-1(2p+2) a quadrature modulator carries out orthogonal modulation to the n way analog signal flow, obtains 2M-1The road (2p+2) modulated signal；
By described 2M-1(2p+2) road modulated signal combining, to generate first analog signal flow.
9. communication means described in any one of -8 according to claim 1, which is characterized in that
The sum of bandwidth of the n way analog signal flow is less than or equal to the bandwidth of first analog signal flow；
The bandwidth of each way analog signal flow in the n way analog signal flow is less than the bandwidth of first data flow.
10. a kind of communication means characterized by comprising
Couple in multiplexer DSLAM obtains the first data flow；
First stream compression is changed to n way analog signal flow, n >=2 by the DSLAM；
The DSLAM sends the n way analog signal flow to distributed node cells D PU by digital user wire DSL, so as to Being combined the n way analog signal flow in the DPU is the first analog signal flow.
11. communication means according to claim 10, which is characterized in that the DSLAM is by first data stream For n way analog signal flow, specifically include:
The DSLAM carries out constellation mapping to first data flow, to obtain the first digital frequency-domain stream；
The DSLAM carries out serioparallel exchange to the first digital frequency-domain stream, to obtain the road n the first sub-figure frequency-region signal Stream；
The DSLAM carries out precoding processing, modulation treatment and digital-to-analogue to the first sub-figure of the road n frequency-region signal stream and turns It changes, to obtain the n way analog signal flow.
12. communication means according to claim 10, which is characterized in that the DSLAM is by first data stream For n way analog signal flow, specifically include:
The DSLAM carries out constellation mapping, precoding processing, modulation treatment and digital-to-analogue conversion to first data flow, with Obtain the second analog signal flow；
The DSLAM carries out serioparallel exchange to second analog signal flow, to obtain the n way analog signal flow.
13. communication means described in any one of 0-12 according to claim 1, which is characterized in that the communication means also wraps It includes:
The DSLAM sends the first configuration signal to the DPU, the first configuration signal be used to indicate DPU configuration with The corresponding combining parameter of branch parameter, the branch parameter are that first stream compression is being changed to the road n by the DSLAM Used parameter during sub- analog signal flow.
14. a kind of distributed node cells D PU characterized by comprising
Receiving unit, the n way analog signal flow sent for receiving couple in multiplexer DSLAM by digital user wire DSL, institute It states the n way analog signal flow DSLAM the first stream compression is changed to the n way analog signal flow and obtain, n >=2；
Combiner unit, the n way analog signal flow combining for receiving the receiving unit is the first analog signal Stream；
Transmission unit, described for sending that the combiner unit generates at least one user front end device CPE by DSL One analog signal flow, in order to which first analog signal flow received is converted to first data flow by each CPE.
15. DPU according to claim 14, which is characterized in that
The receiving unit is also used to receive the first configuration signal that the DSLAM is sent, and the first configuration signal is for referring to Show that the DPU configures combining parameter corresponding with branch parameter, the branch parameter is the DSLAM by first data Circulation is changed to used parameter during the n way analog signal flow；
The DPU further includes configuration unit；
The configuration unit, for configuring the combining parameter according to the first configuration signal；
The n way is simulated and is believed specifically for the combining parameter according to the configuration of described dispensing unit by the combiner unit Number stream combining be first analog signal flow.
16. DPU according to claim 14 or 15, which is characterized in that
The DPU further includes sampling unit；
The sampling unit, each way mould in the n way analog signal flow for being received to the receiving unit Quasi- signal stream carries out over-sampling；
The combiner unit, specifically for the sub- analog signal flow after all sampling unit over-samplings to be combined, to generate First analog signal flow.
17. DPU according to claim 16, which is characterized in that
The sampling unit, it is orthogonal specifically for being carried out to each way analog signal flow in the n way analog signal flow Sampling, to obtain the sub- analog signal flow after the quadrature sampling of the road n；
The combiner unit, specifically for the sub- analog signal flow after sampling unit quadrature sampling described in the road n is combined, with Generate first analog signal flow.
18. DPU according to claim 14 or 15, which is characterized in that
The combiner unit specifically carries out orthogonal modulation to the n way analog signal flow, to generate first analog signal Stream.
19. DPU according to claim 18, which is characterized in that in n=2K, in the case where K >=1, the combiner unit tool Body is used for:
Using n-1 quadrature modulator, K grades of orthogonal modulations are carried out to the n way analog signal flow, to generate the first simulation letter Number stream；Wherein,
In the i-stage quadrature modulation process of the K grades of orthogonal modulation, the DPU uses 2K-iA quadrature modulator, to 2K-i+1 Road signal stream to be modulated carries out orthogonal modulation, obtains 2K-iRoad modulated signal stream, i ∈ 1 ..., K }；
Wherein, the signal stream to be modulated of the 1st grade of orthogonal modulation is the sub- analog signal flow, the tune that K grades of orthogonal modulations obtain Signal stream processed is first analog signal flow.
20. DPU according to claim 18, which is characterized in that in n=2M(2p+1), M >=1, in the case where p >=0, institute Combiner unit is stated to be specifically used for:
UsingA quadrature modulator carries out M grades of orthogonal modulations to the n way analog signal flow, Obtain the road 2p+1 modulated signal；
The road 2p+1 modulated signal is combined, to generate first analog signal flow；
Wherein, in the j-th stage quadrature modulation process of the M grades of orthogonal modulation, the DPU uses (2p+1) 2M-jIt is a orthogonal Modulator, to (2p+1) 2M-j+1Road signal stream to be modulated carries out orthogonal modulation, obtains (2p+1) 2M-jRoad modulated signal stream, j ∈ 1 ..., and M }, the signal stream to be modulated of the 1st grade of orthogonal modulation is the sub- analog signal flow.
21. DPU according to claim 18, which is characterized in that in n=2M(2p+2), M >=1, in the case where p >=0, institute Combiner unit is stated to be specifically used for:
Using 2M-1(2p+2) a quadrature modulator carries out orthogonal modulation to the n way analog signal flow, obtains 2M-1· The road (2p+2) modulated signal；
By described 2M-1(2p+2) road modulated signal combining, to generate first analog signal flow.
22. DPU described in any one of 4-21 according to claim 1, which is characterized in that
The sum of bandwidth of the n way analog signal flow is less than or equal to the bandwidth of first analog signal flow；
The bandwidth of each way analog signal flow in the n way analog signal flow is less than the bandwidth of first data flow.
23. a kind of couple in multiplexer DSLAM characterized by comprising
Acquiring unit, for obtaining the first data flow；
Converting unit, first stream compression for getting the acquiring unit are changed to n way analog signal flow, n ≥2；
Transmission unit, for sending the institute that the converting unit obtains to distributed node cells D PU by digital user wire DSL N way analog signal flow is stated, in order to which n way analog signal flow combining is the first analog signal flow by the DPU.
24. DSLAM according to claim 23, which is characterized in that the converting unit is specifically used for:
Constellation mapping is carried out to first data flow, to obtain the first digital frequency-domain stream；
Serioparallel exchange is carried out to the first digital frequency-domain stream, to obtain the road n the first sub-figure frequency-region signal stream；
Precoding processing, modulation treatment and digital-to-analogue conversion are carried out to the first sub-figure of the road n frequency-region signal stream, to obtain State n way analog signal flow.
25. DSLAM according to claim 23, which is characterized in that the converting unit is specifically used for:
Constellation mapping, precoding processing, modulation treatment and digital-to-analogue conversion are carried out to first data flow, to obtain the second mould Quasi- signal stream；
Serioparallel exchange is carried out to second analog signal flow, to obtain the n way analog signal flow.
26. the DSLAM according to any one of claim 23-25, which is characterized in that
The transmission unit, is also used to send the first configuration signal to the DPU, and the first configuration signal is used to indicate described DPU configures corresponding with branch parameter combining parameter, and the branch parameter is the DSLAM by first data stream Used parameter during for the n way analog signal flow.
27. a kind of communication system, which is characterized in that including the distribution as described in any one of the claims 14-22 Before node unit DPU, couple in multiplexer DSLAM and at least one user as described in any one of claim 23-26 End device CPE；Wherein, pass through n DSL connection, each of at least one described CPE between the CPU and the DSLAM CPE passes through DSL and connect with the DPU, n >=2.
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