CN108512601A - A kind of method and apparatus for returning access network more - Google Patents
A kind of method and apparatus for returning access network more Download PDFInfo
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- CN108512601A CN108512601A CN201710120698.4A CN201710120698A CN108512601A CN 108512601 A CN108512601 A CN 108512601A CN 201710120698 A CN201710120698 A CN 201710120698A CN 108512601 A CN108512601 A CN 108512601A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/275—Ring-type networks
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Abstract
The embodiment of the present application provides a kind of method and apparatus for returning access network more, is related to the communications field, can solve the problems, such as that the multiplex of access network can not carry out dispersion compensation.Its method is：First website determines the wavelength of the first website business information to be sent, and the wavelength of the first website business information to be sent includes the corresponding subcarrier in each residential site, and is pre-compensated for the corresponding subcarrier in each residential site according to the corresponding dispersion values in each residential site；Business information entrained by subcarrier after the precompensation of each residential site is sent to next-hop website by the first website.The embodiment of the present application is applied to the scene of asymmetric service bandwidth up and down.
Description
Technical field
This application involves the communications field more particularly to a kind of method and apparatus for returning access network more.
Background technology
Current optical-fiber network networking uses typical ring network structure.In annular networking, to terminate point by point, point-by-point business up and down
Technology is the most universal.As shown in Figure 1, for using the hardware mould of point-by-point termination, a kind of point-by-point ring network structure of service technique up and down
Block and Organization Chart, Organization Chart include broadband gateway control device (Broadband Network Gateway, BNG) and optical link
Terminal (Optical Line Terminal, OLT), wherein 60% bandwidth is in electric layer break-through.The light used in the prior art one
Module is at low cost, and bandwidth does not waste in ring, is a kind of networking model based on bandwidth in ring.
But point-by-point termination, point-by-point service technique up and down can cause most of bandwidth in electric layer break-through, and photosphere needs essence
True dispersion compensation, but point-by-point electricity relaying, had not only wasted photosphere module but also had introduced delay.In addition, the new upper wavelength in business transmission
It is not easy to control with the residual dispersion of break-through wavelength, multiplex dispersion compensation can not be carried out.
Invention content
The embodiment of the present application provides a kind of method and apparatus for returning access network more, can solve the multiplex of access network without
Method carries out the problem of dispersion compensation.
On the one hand, the embodiment of the present application provides a kind of method for returning access network more, which is characterized in that including：First stop
Point determines the wavelength of the first website business information to be sent, and the wavelength of the first website business information to be sent includes each residential site
Corresponding subcarrier, and the corresponding subcarrier in each residential site is pre-compensated for according to the corresponding dispersion values in each residential site；First
Business information entrained by subcarrier after the precompensation of each residential site is sent to next-hop website by website.So,
One website respectively can pre-compensate for the corresponding subcarrier in each residential site according to the corresponding dispersion values in each residential site, phase
Than the prior art, dispersion compensation can not be carried out to the multiplex of each website, the embodiment of the present application can solve the multiplex of access network
The problem of can not carrying out dispersion compensation.
In a kind of possible design, before the first website determines the wavelength of the first website business information to be sent, method
Further include：Bandwidth of first website needed for each residential site is that subcarrier is distributed in each residential site, and pre-estimation is to each
Residential site sends the corresponding dispersion values in each residential site when the subcarrier of each residential site distribution.So, the first website can
It is that subcarrier is distributed in each residential site with the bandwidth needed for each residential site, is transmitted compared to point-to-point as shown in Figure 2
Technical solution, optical-fiber network shown in Fig. 2 include several BNG and OLT, and the wavelength of point-to-point, that is, any BNG, which can be reached directly, appoints
One OLT, vice versa.In the technical solution of point-to-point transmission, the logical connection number of network and the veneer quantity of each website are at just
Than causing point-to-point transmission technology and bandwidth correlation weak, waste bandwidth, the embodiment of the present application can be according to needed for each website
Bandwidth allocation subcarrier, can solve the problems, such as point-to-point transmission technical solution waste bandwidth.
In a kind of possible design, the first website determines the wavelength of the first website business information to be sent, the first website
The wavelength of business information to be sent includes the corresponding subcarrier in each residential site, and according to the corresponding dispersion values pair in each residential site
Each the corresponding subcarrier precompensation in residential site includes：First website is former according to the distribution that wavelength division multiplexed network medium wavelength does not conflict
Then determine the wavelength of the first website business information to be sent；For first website according to the corresponding dispersion values in each residential site, determining will
The corresponding subcarrier in each residential site is sent to the bandwidth needed for each residential site；First website is corresponding according to each residential site
Subcarrier is sent to the subcarrier of each residential site distribution of the Bandwidth adjustment needed for each residential site；First website is exchanged whole rear every
The corresponding subcarrier in a residential site carries out dispersion pre-compensation respectively according to the corresponding dispersion values in each residential site.So,
One website, can be first according to the corresponding color in each residential site when carrying out dispersion pre-compensation to the corresponding subcarrier in each residential site
The bandwidth needed for the determining each residential site of value is dissipated, then each residential site of the Bandwidth adjustment needed for each residential site is distributed
Subcarrier；Then, the corresponding subcarrier in each residential site after adjustment is carried out respectively according to the corresponding dispersion values in each residential site
Dispersion pre-compensation.
In a kind of possible design, method further includes：First website receives each Source Site that upper hop website is sent
The wavelength of corresponding business information；It is corresponding that first website demodulates the first website from the wavelength that each Source Site corresponds to business information
Subcarrier.So, the first website can receive the wavelength that each Source Site corresponds to business information, but only demodulate each source station
The corresponding subcarrier of first website in the wavelength of the corresponding business information of point.
On the other hand, the embodiment of the present application provides a kind of method for returning access network more, which is characterized in that including：First
Website determines the wavelength of the first website business information to be sent, and will be to be sent according to the corresponding dispersion values adjustment in each residential site
Business information entrained by the wavelength of business information distributes to the time slot of each residential site；First stop point is according to each place after adjustment
Business information entrained by the wavelength of business information to be sent is sent to next-hop website by the time slot of website.So,
After one website determines the wavelength of the first website business information to be sent, it can be adjusted further according to the corresponding dispersion values in each residential site
Business information entrained by the wavelength of the business information to be sent is distributed to the time slot of each residential site, compared with prior art
One can not carry out multiplex dispersion compensation, and the embodiment of the present application can be by believing each Source Site business to be sent in multiple time slots
The wavelength of breath carries out dispersion compensation, to solve the problems, such as that multiplex can not carry out multiplex dispersion compensation.
In a kind of possible design, before the wavelength that the first website determines the first website business information to be sent, side
Method further includes：Bandwidth of first website needed for each residential site is that time slot is distributed in each residential site, and pre-estimation is to each
Residential site sends the corresponding dispersion values in each residential site when the wavelength of business information to be sent.So, the first website can be with
Bandwidth allocation time slot needed for each website can solve the problems, such as the technical solution waste bandwidth of point-to-point transmission.
In a kind of possible design, the first website determines the wavelength of the first website business information to be sent, and according to every
The corresponding dispersion values in a residential site adjust the business information entrained by the wavelength of business information to be sent and distribute to each residential site
Time slot include：First website determines the first website industry to be sent according to the distribution principle that wavelength division multiplexed network medium wavelength does not conflict
The wavelength for information of being engaged in；First website according to the corresponding dispersion values in each residential site determine by the wavelength of business information to be sent according to
The time slot of distribution is sent to the bandwidth needed for each residential site；First website according to by the wavelength of business information to be sent according to point
The time slot matched is sent to the time slot of each residential site distribution of the Bandwidth adjustment needed for each residential site；First website is exchanged whole rear every
The time slot of a residential site distribution carries out dispersion pre-compensation respectively according to the corresponding dispersion values in each residential site, will carry out dispersion and mends in advance
The time slot for repaying rear each residential site is carried to the business information entrained by the wavelength of business information to be sent distributing to each place
The time slot of website.So, when the first website adjusts the time slot of each residential site according to the corresponding dispersion values in each residential site,
First the bandwidth needed for each residential site can be determined according to the corresponding dispersion values in each residential site, then according to each residential site institute
The time slot of each residential site after progress dispersion pre-compensation, is then carried to by the time slot of each residential site distribution of Bandwidth adjustment needed
The time slot that business information entrained by the wavelength of business information to be sent is distributed to each residential site both may be used.
In a kind of possible design, method further includes：First website receives each Source Site that upper hop website is sent
The wavelength of corresponding business information；The time slot that first website is distributed according to the first website corresponds to the wave of business information from each Source Site
The wavelength that the first website corresponds to business information is demodulated in length.So, the first website can receive each Source Site and correspond to industry
The wavelength for information of being engaged in, but only demodulate each Source Site in the time slot of the first website distribution and correspond to entrained by the wavelength of business information
Business information.
In another aspect, the embodiment of the present application provides a kind of first website, which is characterized in that including：Determination unit, for true
The wavelength of the wavelength of fixed first website business information to be sent, the first website business information to be sent includes that each residential site corresponds to
Subcarrier, and according to the corresponding dispersion values in each residential site to the corresponding subcarrier in each residential site pre-compensate for；Transmission unit,
It is sent to next-hop website for the business information entrained by the subcarrier after pre-compensating for each residential site.
In a kind of possible design, the first website further includes：Allocation unit, for the band needed for each residential site
Width is that subcarrier is distributed in each residential site, and when pre-estimation sends the subcarrier each residential site distributed to each residential site is each
The corresponding dispersion values in residential site.
In a kind of possible design, determination unit is used for：The distribution not conflicted according to wavelength division multiplexed network medium wavelength is former
Then determine the wavelength of the first website business information to be sent；According to the corresponding dispersion values in each residential site, determine each place station
The corresponding subcarrier of point is sent to the bandwidth needed for each residential site；It is sent to according to the corresponding subcarrier in each residential site each
The subcarrier of each residential site distribution of Bandwidth adjustment needed for residential site；To the corresponding subcarrier in each residential site after adjustment according to
The corresponding dispersion values in each residential site carry out dispersion pre-compensation respectively.
In a kind of possible design, the first website further includes：Receiving unit, for receiving the every of upper hop website transmission
A Source Site corresponds to the wavelength of business information；Demodulating unit, for being demodulated from the wavelength that each Source Site corresponds to business information
The corresponding subcarrier of first website.
In another aspect, the embodiment of the present application provides a kind of first website, which is characterized in that including：Determination unit, for true
The wavelength of fixed first website business information to be sent, and believed business to be sent according to the corresponding dispersion values adjustment in each residential site
Business information entrained by the wavelength of breath distributes to the time slot of each residential site；Transmission unit, for according to each place after adjustment
Business information entrained by the wavelength of business information to be sent is sent to next-hop website by the time slot of website.
In a kind of possible design, the first website further includes：Allocation unit, for the band needed for each residential site
Width is that time slot is distributed in each residential site, and pre-estimation sends each place station when the wavelength of business information to be sent to each residential site
The corresponding dispersion values of point.
In a kind of possible design, determination unit is used for：The distribution not conflicted according to wavelength division multiplexed network medium wavelength is former
Then determine the wavelength of the first website business information to be sent；It is determined business to be sent according to the corresponding dispersion values in each residential site
The wavelength of information is sent to the bandwidth needed for each residential site according to the time slot of distribution；According to by the wavelength of business information to be sent
It is sent to the time slot that the Bandwidth adjustment needed for each residential site is the distribution of each residential site according to the time slot of distribution；To every after adjustment
The time slot of a residential site distribution carries out dispersion pre-compensation respectively according to the corresponding dispersion values in each residential site, will carry out dispersion and mends in advance
The time slot for repaying rear each residential site is carried to the business information entrained by the wavelength of business information to be sent distributing to each place
The time slot of website.
In a kind of possible design, the first website further includes：Receiving unit, for receiving the every of upper hop website transmission
A Source Site corresponds to the wavelength of business information；Demodulating unit, time slot for being distributed according to the first website is from each Source Site pair
It answers and demodulates the wavelength that the first website corresponds to business information in the wavelength of business information.
In another aspect, the embodiment of the present application provides a kind of computer storage media, for being stored as above-mentioned first website
Computer software instructions used, it includes for executing the program designed by above-mentioned aspect.
So, the first website can first determine the wavelength of the first website business information to be sent, business letter to be sent
The wavelength of breath includes that each residential site carries out the subcarrier after dispersion compensation, and then the first website is corresponding according to each residential site
Dispersion values pre-compensate for the corresponding subcarrier in each residential site, and then the first website will be entrained by the subcarrier after compensation
Business information is sent to each residential site.Multiplex dispersion compensation can not be carried out compared with prior art, and the embodiment of the present application can lead to
It crosses and dispersion compensation is carried out respectively to the subcarrier of the wavelength of business information to be sent, the multiplex to solve access network can not be into
The problem of row dispersion compensation.Or, after the first website determines the wavelength of the first website business information to be sent, further according to each place station
Business information entrained by the wavelength of the business information to be sent is distributed to each residential site by the corresponding dispersion values adjustment of point
Time slot, one can not carry out multiplex dispersion compensation compared with prior art, the embodiment of the present application can be by treating in multiple time slots
The wavelength for sending business information carries out dispersion compensation, to solve the problems, such as that the multiplex of access network can not carry out dispersion compensation.
Description of the drawings
Fig. 1 is a kind of point-by-point termination provided by the embodiments of the present application, the network architecture schematic diagram of point-by-point service technique up and down；
Fig. 2 is a kind of network architecture schematic diagram of point-to-point transmission technology provided by the embodiments of the present application；
Fig. 3 is a kind of network architecture schematic diagram provided by the embodiments of the present application；
Fig. 4 is a kind of internal structure schematic diagram of first website provided by the embodiments of the present application；
Fig. 5 is a kind of signal interaction schematic diagrames for returning access network provided by the embodiments of the present application more；
Fig. 6 is a kind of network architecture schematic diagram provided by the embodiments of the present application；
Fig. 7 is the structural schematic diagram of λ 1 provided by the embodiments of the present application a kind of；
Fig. 8 is a kind of structural schematic diagram of OLT provided by the embodiments of the present application；
Fig. 9 is the structural schematic diagram of λ 9 provided by the embodiments of the present application a kind of；
Figure 10 is a kind of network architecture schematic diagram provided by the embodiments of the present application；
Figure 11 is a kind of network architecture schematic diagram provided by the embodiments of the present application；
Figure 12 is a kind of structural schematic diagram of OLT1 provided by the embodiments of the present application；
Figure 13 is a kind of network architecture schematic diagram of passive optical-fiber network technology provided by the embodiments of the present application；
Figure 14 is a kind of signal interaction schematic diagrames for returning access network provided by the embodiments of the present application more；
Figure 15 is a kind of schematic diagram of the corresponding time slot of first website provided by the embodiments of the present application；
Figure 16 is a kind of schematic diagram of the corresponding time slots of each BNG provided by the embodiments of the present application；
Figure 17 is a kind of structural schematic diagram of first website provided by the embodiments of the present application；
Figure 18 is a kind of structural schematic diagram of first website provided by the embodiments of the present application.
Specific implementation mode
The embodiment of the present application provides a kind of by the networking side for the remote multiple websites for more returning core layer switch to drive
Case, such as the networking plan by more returning multiple websites within the 100km that core layer interchanger directly drives, can be applied to light net
The scene of transmission data in network, each core switch can realize flow equalization, and each website bandwidth can realize on-demand configuration, applicable
The scene of service bandwidth above and below asymmetry.
The network architecture of the embodiment of the present application may include multiple websites, and the station that multiple websites are at least two types
Point, such as can be OLT and BNG.The present invention is illustrated by taking the first website as an example, and the first website is included in above-mentioned multiple websites
In, the first website can be OLT or BNG.For example, as shown in Figure 3, it is assumed that optical-fiber network includes 4 BNG and 8 OLT, if
First website is OLT, then when OLT, which receives BNG, corresponds to the business information entrained by the wavelength of business information, BNG is the source of OLT
Website, OLT are the residential site of BNG；It is sent to BNG when OLT is corresponded to the business information entrained by the wavelength of business information by OLT
When, BNG is the residential site of OLT, and OLT is the Source Site of BNG, that is to say, that in contrast Source Site and residential site are.When
When one website is OLT2, then OLT2 can be used for receiving 4 BNG that upper hop website OLT1 is sent and correspond to business information respectively
Business information entrained by wavelength, here can BNG to correspond to the wavelength of business information be referred to as downstream wavelength, and can be to 4
BNG sends the business information entrained by the first website wavelength to be sent；If the first website is BNG2, BNG2 can be used for connecing
It receives 8 OLT that upper hop website BNG3 is sent and corresponds to the business information entrained by the wavelength of business information, OLT corresponds to business letter
The wavelength of breath can be upstream wavelength, and the business letter entrained by the first website wavelength to be sent can be sent to 8 OLT
Breath.
Fig. 4 is a kind of internal structure schematic diagram of the first website of the application, and in this application, the first website may include
It is erbium-doped fiber amplifier (Erbium-doped Optical Fiber Amplifier, EDFA) 401, beam splitter 402, photosynthetic
Beam device 403, optical add/drop multiplexer (Optical Add-DropMultiplexer, OADM) 404 and line card 405.Wherein,
EDFA401 is used to carry out power distribution to wavelength for amplifying input wavelength, beam splitter 402, and combiner device 403 is used for will be each
Wavelength is combined into a branch of wavelength, and OADM404 is for distinguishing each wavelength in a branch of wavelength, and line card 405 is for parsing wave
Long and generation wavelength, line card 405 may include application-specific integrated circuit (Application Specific Intergrated
Circuits, ASIC) 4051, it can be used for signal processing.
The embodiment of the present application provides a kind of method for returning access network more, includes OLT and BNG with the network architecture, and first
Website illustrates the embodiment of the present application for being OLT.OLT determines that the wavelength of OLT business information to be sent, OLT are to be sent
The wavelength of business information includes the corresponding subcarriers of each BNG；Then OLT can be by the wavelength institute of OLT business information to be sent
The business information of carrying is sent to each BNG, so that each BNG wavelength for corresponding to from OLT business information parses itself and corresponds to
Subcarrier.Meanwhile OLT can also receive each BNG and correspond to business information entrained by the wavelength of business information, and from each
BNG corresponds to the corresponding subcarriers of demodulation OLT in the wavelength of business information.Alternatively, OLT determines the wave of OLT business information to be sent
It is long；The time slot of each BNG is then determined according to the corresponding dispersion values of each BNG；Then OLT according to determining each BNG when
Business information entrained by the wavelength of OLT business information to be sent is sent respectively to each BNG by gap.OLT can also be received often
A BNG corresponds to the wavelength of business information, and according to the OLT time slots distributed demodulates each BNG and correspond to the wavelength of business information and taken
The business information of band.
In addition, in the embodiment of the present application, the corresponding downstream wavelengths of OLT and the corresponding upstream wavelengths of BNG can be located at same
It is transmitted on root optical fiber.It is transmitted if the corresponding downstream wavelengths of OLT and the corresponding upstream wavelengths of BNG are located on two different optical fiber,
Then uplink and downlink wavelength can reuse.
A kind of network architecture of the embodiment of the present application offer includes OLT and BNG, and the first website is that OLT return access net more
The method of network, as shown in figure 5, including：
501, the first website receives the wavelength that each Source Site that upper hop website is sent corresponds to business information.
As shown in figure 3, if the first website is OLT2, upper hop website is OLT1, Source Site BNG1-BNG4, then OLT2
The wavelength that BNG1-BNG4 corresponds to business information can be received by OLT1.Wherein, BNG1-BNG4 corresponds to the wave of business information
Length includes the wavelength for whole business information that BNG1-BNG4 is sent to OLT1-OLT8.It should be noted that the first website can be with
For any of OLT1-OLT8.
Similarly, if as shown in figure 3, the first website be BNG3, upper hop website be BNG4, Source Site OLT1-OLT8,
Then BNG3 can receive the wavelength that OLT1-OLT8 corresponds to business information by BNG4, and wherein OLT1-OLT8 corresponds to business information
Wavelength includes the wavelength for whole business information that OLT1-OLT8 is sent to BNG1-BNG4.It should be noted that the first website can
Think any of BNG1-BNG4.
502, the first website demodulates the corresponding subcarrier of the first website from the wavelength that each Source Site corresponds to business information.
According to the citing in step 501, that is, OLT2 is corresponded to from BNG1-BNG4 and is demodulated in the wavelength of business information
The corresponding subcarriers of OLT2.
As shown in fig. 6, the wavelength that BNG1-BNG4 corresponds to business information is downstream wavelength λ 1- λ 8, respectively BNG1 corresponds to λ 1
With λ 2；BNG2 corresponds to λ 3 and λ 4；BNG3 corresponds to λ 5 and λ 6；BNG4 corresponds to λ 7 and λ 8.And each λ includes corresponding to 8 respectively
The subcarrier of OLT, for example, as shown in fig. 7, for a kind of schematic diagram of λ 1, each two subcarrier in λ 1 corresponds to one
OLT.That is, OLT2 parses the corresponding subcarriers of OLT2 respectively from the λ 1- λ 8 received.Wherein, subcarrier can be with
Carry the business information that each BNG is sent to the first website.
In a kind of possible design, as shown in figure 8, the internal structure schematic diagram of the schematic diagram and OLT in kind for OLT,
When the downstream wavelength (λ 1- λ 8) that BNG1-BNG4 is sent reaches the sides OLT, the EDFA amplifications in OLT can be first passed through, are then passed through
It crosses a beam splitter and carries out power distribution, the optical wavelength after power distribution is divided into the OADM differentiations into 1x8, OADM's
Each light-emitting window connects a photodiode (Photo Diode, PD), and telecommunications is obtained after opto-electronic conversion per road PD
Number, and entering signal processing later is sampled by analog-digital converter (Analog to Digital Converter, ADC)
Cell processing, to demodulate in λ 1- λ 8 the corresponding subcarriers of the OLT in each wavelength.
In a kind of possible design, subcarrier can be orthogonal frequency division multiplexing (Orthogonal Frequency
Division Multiplexing, OFDM) subcarrier.
503, bandwidth of first website needed for each residential site be each residential site distribute subcarrier, and pre-estimation to
Each residential site sends the corresponding dispersion values in each residential site when the subcarrier of each residential site distribution.
First website can get the bandwidth needed for each residential site, when the first website sends wavelength to each residential site
When, the first website can the bandwidth needed for each residential site be first that subcarrier is distributed in each residential site.Meanwhile first website
Measure each residential site to the first website distance, to the first website of pre-estimation to each residential site send subcarrier when it is each
The corresponding dispersion values in residential site.
As an example it is assumed that there is 3 residential sites, respectively A websites, B websites and C websites, the first website measure first stop
The distance of point to A websites is 25 kms, and the distance of the first website to B websites is 50 kms, and the distance of the first website to C websites is
100 kms, then A websites, B websites and the corresponding dispersion values of C websites can be 500 (ps/nm), 1000 (ps/nm) and
2000(ps/nm).In general, the distance of each residential site to the first website is bigger, the corresponding dispersion values in each residential site are got over
Greatly.
504, the first website determines that the first website is to be sent according to the distribution principle that wavelength division multiplexed network medium wavelength does not conflict
The wavelength of business information.
First website can choose wavelength of the wavelength of the not Wavelength conflict with other websites as business information to be sent.
505, the first website determines according to the corresponding dispersion values in each residential site and sends out the corresponding subcarrier in each residential site
The son of each residential site distribution of the Bandwidth adjustment to the bandwidth needed for each residential site, and needed for each residential site is sent to carry
Wave.
The corresponding dispersion values in each residential site are bigger, and the corresponding subcarrier in each residential site is sent to by the determination of the first website
Bandwidth needed for each residential site is bigger.The each residential site of Bandwidth adjustment of first website needed for each residential site corresponds to
Subcarrier number ni(i=1,2 ...), niFor positive integer.Each corresponding subcarrier number n in residential siteiEvery height is multiplied by carry
The wide bandwidth that can be more than needed for each residential site of wavestrip.
Due to the increase with transmission range, the subcarrier of each frequency point (each of corresponding subcarrier in each residential site
Subcarrier corresponds to a frequency point) it will appear periodic signal-to-noise ratio (Signal To Noise Ratio, SNR) deterioration, therefore it is right
When subcarrier is allocated, the subcarrier (subcarrier of each frequency point corresponds to a serial number) of each serial number needs progress dispersion pre-
Compensation, therefore this method embodiment further includes：
506, the first website exchanges whole rear each corresponding subcarrier in residential site according to the corresponding dispersion values in each residential site
Dispersion pre-compensation is carried out respectively.
The corresponding subcarrier-modulated in each residential site on available wavelength and is passed through the light of the first website by the first website
Transmitter is sent to each residential site.Each residential site measures the reception SNR value of all subcarriers on the wavelength respectively.Each place
Website selects niA subcarrier, the average SNRavg of the corresponding subcarrier in each residential sitei(i=1,2 ...) it needs to meet two
Condition：First, SNRavgiMore than the first predetermined threshold value, such as the first predetermined threshold value can be 15dB.Second, different residential sites
Between SNRavgiDifference is no more than the second predetermined threshold value, such as the second predetermined threshold value can be 1dB, if being unsatisfactory for both of the aforesaid item
Part, then each residential site can reselect niA subcarrier, and judge the n reselectediWhether a subcarrier meets condition.
Each residential site is by the n after meeting conditioniA subcarrier is notified to the first website.
First website can believe business to be sent by inphase quadrature (in-phase quadrature, IQ) modulator
Each corresponding n in residential site in the wavelength of breathiSubcarrier carries out dispersion pre-compensation respectively, and each subcarrier can pre- back-off difference
Dispersion values.For example, if as shown in fig. 6, the first website is BNG1, residential site is OLT1~OLT8, BNG1 industry to be sent
The wavelength for information of being engaged in is λ 1, and the distance of BNG1 to OLT1~OLT8 is respectively 10km~80km；Then BNG1 to OLT1 in λ 1~
The corresponding subcarriers of OLT8 carry out pre- back-off respectively according to the corresponding dispersion values of 10km~80km.
507, the business information entrained by subcarrier after the first website pre-compensates for each residential site is sent to next-hop
Website.
That is, the first website, which treats the corresponding subcarrier in each residential site in the wavelength for sending business information, carries out color
It dissipates after pre-compensating for, then the business information entrained by the wavelength of business information to be sent is sent to next-hop website.
For example, as shown in figure 9, the wavelength of business information to be sent can be λ 9, it is assumed that have 4 residential sites, respectively
For BNG1-BNG4, for each residential site, which can receive λ 9 and parse the subcarrier of the residential site in λ 9.
In a kind of possible design, each residential site does not directly receive the subcarrier of the first website transmission instead of,
The subcarrier of the first website transmission is received by adjacent sites.For example, as shown in Figure 10, if the first website is OLT1,
Then OLT1 needs the wavelength by business information to be sent to be first sent to OLT2, and then each website is by the wave of business information to be sent
Long entrained business information circumferential direction is sequentially sent to next website, until being sent to BNG1.
In addition, as shown in Figure 10, when the first website is OLT1, OLT1 can be by upstream wavelength (λ 9) to be sent OLT1
Entrained business information is sent to OLT2, while OLT1 can be by the business entrained by the downstream wavelength of BNG1-BNG4 transmissions
Information is sent to OLT2, in order to which OLT2 parses the corresponding subcarriers of OLT2 in the downstream wavelength that BNG1-BNG4 is sent.When
When one website is OLT2, the business information entrained by the wavelength of OLT2 business information to be sent can be sent to OLT3 by OLT2,
The wave for the business information and OLT1 business information to be sent entrained by downstream wavelength that OLT2 can send BNG1-BNG4 simultaneously
Business information entrained by long (λ 9) is sent to OLT3, in the downstream wavelength that BNG1-BNG4 transmissions are parsed in order to OLT3
The corresponding subcarriers of OLT3, and the business information entrained by OLT1 and OLT2 respectively upstream wavelength to be sent is sent to next
A website.Then in the case of so circumferential sequentially transmission, when the first website is OLT8, since next-hop website is BNG,
Then OLT8 can only send the business information entrained by the upstream wavelength that each OLT is sent to BNG4, when the first website is BNG4
When, the business information entrained by upstream wavelength can be sent to BNG3 by BNG4, and by the wave of BNG4 business information to be sent
Business information entrained by long (λ 1 and λ 2) is sent to BNG3, then in the case of so circumferential sequentially transmission, works as first stop
When point is BNG1, since next-hop website is OLT, BNG1 can not send the business information entrained by upstream wavelength to OLT1,
The business information entrained by downstream wavelength to be sent BNG1-BNG4 is only sent to OLT1.
In a kind of possible design, when the downstream wavelength that the BNG1-BNG4 shown in Figure 11 is sent reaches the sides OLT1, such as
Shown in Figure 12, downstream wavelength enters 1x2 beam splitters after EDFA1 and carries out power distribution, then after power distribution
Optical wavelength is divided into two-way, by, in step 502 it is stated that mistake, details are not described herein, another way passes through the case where light-emitting window one
The light-emitting window 2 of beam splitter is transmitted using 1x2 combiners device and image intensifer to OLT2.Meanwhile in the line card of OLT1
ASIC needs OLT1 the business information for being sent to BNG1-BNG4 to pass through DAC (Digital to as signal processing unit
Analog Converter, DAC) analog electrical signal is converted to, the analog electrical signal is then modulated to optical sender, so as to light
Analog electrical signal is converted to wavelength X 9 and λ 10 by transmitter, and by combiner device is combined and is passed through same root λ 9 and λ 10
Optical fiber is transferred to EDFA2, and λ 9 and λ 10 is amplified and exported to next-hop website i.e. OLT2 by EDFA2.In addition, when there is 2 or more
When optical sender, a combiner device coupling output can be first passed through, then wavelength merging is carried out by another combiner device.
So, in each website annular networking, the first website can first determine the first website business information to be sent
Wavelength, the wavelength of business information to be sent includes that each residential site carries out the subcarrier after dispersion compensation, the first website according to
Each corresponding dispersion values in residential site pre-compensate for the corresponding subcarrier in each residential site, after then the first website will compensate
The corresponding subcarrier in each residential site entrained by business information be sent to each residential site.It can not be closed compared with prior art
Wave dispersion compensates, and the embodiment of the present application can carry out dispersion benefit respectively by the subcarrier of the wavelength to business information to be sent
It repays, to solve the problems, such as that multiplex can not carry out multiplex dispersion compensation.And first website can also receive each Source Site pair
The wavelength of business information is answered, and only parses the corresponding subcarrier of the first website, makes the quantity of the optical sender of Source Site side can be with
Greatly reduce, to reduce cost.
In addition, as shown in figure 13, be a kind of passive optical-fiber network of tree structure (Passive Optical Network,
PON) the network architecture schematic diagram of technology a, wherein OLT can access three BNG.Since dispersion compensation can not be carried out, no
Crosstalk can be caused with website, the distance between each website is limited in 20km, and the embodiment of the present application can carry out dispersion compensation, from
And the crosstalk of different websites is reduced, therefore the distance between each website can reach 100km or farther.
A kind of network architecture of the embodiment of the present application offer includes OLT and BNG, and the first website is that OLT return access net more
The method of network, as shown in figure 14, including：
1401, the first website receives the wavelength that each Source Site that upper hop website is sent corresponds to business information.
Detailed process can refer to step 501, it should be noted that the wave in wavelength and step 501 in step 1401
Length is distinguishing, and the wavelength in step 501 may include multiple subcarriers, and the wavelength in step 1401 is time-division slot transmission
To next-hop website.
1402, the time slot that the first website is distributed according to the first website is solved from the wavelength that each Source Site corresponds to business information
The first website is adjusted to correspond to the wavelength of business information.
A wavelength is distributed in each Source Site, and the wavelength time-division slot that each Source Site corresponds to business information is sent, the
One website demodulates the wavelength of the corresponding time slot of the first website from the wavelength that each Source Site corresponds to business information, that is to say, that
First website demodulates the wavelength that each Source Site corresponds to business information in the corresponding time slot of the first website.
As shown in figure 15, it is assumed that Source Site is respectively BNG1, BNG2 and BNG3, and each Source Site corresponds to the wave of business information
Long point of 6 time slots are sent, and 6 time slots are respectively t1, t2, t3, t4, t5 and t6.Wherein, BNG1 corresponds to the wavelength of business information
In, the wavelength of time slot t1 and time slot t4 are the corresponding time slots of the first website；BNG2 is corresponded in the wavelength of business information, time slot t2 and
The wavelength of time slot t5 is the corresponding time slot of the first website；BNG3 is corresponded in the wavelength of business information, the wave of time slot t3 and time slot t6
Length is the corresponding time slot of the first website.
1403, bandwidth of first website needed for each residential site be each residential site distribute time slot, and pre-estimation to
Each residential site sends the corresponding dispersion values in each residential site when the wavelength of business information to be sent.
First website can pre-save the bandwidth needed for each residential site, when the first website sends wavelength to residential site
When, can the bandwidth needed for each residential site be first that time slot is distributed in each residential site, the wavelength of each time slot corresponds to respectively
Each residential site, so that the wavelength that the first website is sent reaches the rate all same of different residential sites.
As an example it is assumed that residential site is respectively BNG1, BNG2 and BNG3, the first website is got needed for each residential site
Bandwidth be respectively that BNG1 corresponds to 56Gbps, BNG2 corresponds to 28Gbps, and BNG3 corresponds to 22Gbps, when system specification index request one
Periodically, then the time slot of 22 μ s, 45 μ s and 58 μ s in every 125 μ s, can be distributed respectively to BNG1, BNG2 and BNG3 so that the
The rate that the wavelength of one website business information to be sent reaches different residential sites is 10Gbps.
Each residential site is corresponding when first website pre-estimation sends the wavelength of business information to be sent to each residential site
Dispersion values can refer to step 503.
1404, the first website determines that the first website is to be sent according to the distribution principle that wavelength division multiplexed network medium wavelength does not conflict
The wavelength of business information.
That is, first stop point is chosen not with the wavelength of the Wavelength conflict of other websites as business information to be sent
Wavelength.
1405, the first website determines the first website by the wavelength of business information to be sent according to the dispersion values of each residential site
Entrained business information distributes to the time slot of each residential site.
The distance of first website to each residential site is bigger, and the dispersion values of each residential site are bigger, and the first website is dispersion
The time slot of the bigger residential site distribution of value is bigger.
1406, the first website according to the corresponding dispersion values in each residential site determine by the wavelength of business information to be sent according to
The time slot of distribution is sent to the bandwidth needed for each residential site.
The dispersion values of each residential site are bigger, and the first website sends out the wavelength of business information to be sent according to the time slot of distribution
It send smaller to the bandwidth needed for each residential site.
1407, the first website is sent to each residential site according to by the wavelength of business information to be sent according to the time slot of distribution
Required Bandwidth adjustment is the time slot of each residential site distribution.
Bandwidth of first website needed for each residential site determines the time slot Δ t for distributing to each residential sitei, Δ tiMultiply
It can be more than the bandwidth needed for each residential site with unit time slot bandwidth.
1408, the first website exchanges the time slot of whole rear each residential site distribution according to the corresponding dispersion values point in each residential site
Dispersion pre-compensation is not carried out, and the time slot of each residential site after progress dispersion pre-compensation is determined as the wave of business information to be sent
Long entrained business information distributes to the time slot of each residential site.
The corresponding dispersion values in each residential site are bigger, and the time slot of each residential site is bigger after progress dispersion pre-compensation.
1409, first stop point will be entrained by the wavelength of business information to be sent according to the time slot of each residential site after adjustment
Business information is sent to next-hop website.
That is, first stop presses the time slot of each residential site after shining into row dispersion pre-compensation by business information to be sent
Wavelength entrained by business information be sent to next-hop website.
For example, as shown in figure 16, it is assumed that residential site is respectively BNG1, BNG2 and BNG3, and first stop point carries out dispersion
The time slot of each residential site is respectively after precompensation：BNG1 corresponds to time slot t1 and t4, and BNG2 corresponds to time slot t2 and t5, and BNG3 is corresponded to
Time slot t3 and t6.
First stop point sends out the business information entrained by the wavelength of business information to be sent according to the time slot of each residential site
Next-hop website is given, so that the business information entrained by the wavelength can be sent to each residential site by annular.Meanwhile if the
The next-hop website of one website is not residential site, that is to say, that the first website is OLT, next-hop website be also OLT websites rather than
When BNG websites, then each BNG can be corresponded to business information and the industry to be sent entrained by the wavelength of business information by the first website
Business information entrained by the wavelength for information of being engaged in is sent to next-hop website together, so that next-hop website is according to next-hop website
The time slot of distribution parses each BNG and corresponds to business information entrained by the wavelength of business information, and by business information to be sent
Business information entrained by wavelength continues to be sent to next-hop website；If the next-hop website of the first website is residential site, i.e.,
When one website is OLT, next-hop website is BNG, then is not necessarily to each BNG corresponding to the letter of the business entrained by the wavelength of business information
Breath is sent to next-hop website, can only send the business information entrained by the wavelength of each OLT business information to be sent under
One jumps website.
Similarly, the first website is BNG, and when next-hop website is also BNG, then the first website can correspond to each OLT
Business information one entrained by the wavelength of business information and BNG business information to be sent entrained by the wavelength of business information is concurrent
Next-hop website is given, business information is corresponded to so that the time slot that next-hop website is distributed according to next-hop website parses each BNG
Wavelength entrained by business information, and the business information entrained by the wavelength of business information to be sent continued to be sent to next
Jump website；If the next-hop website of the first website is residential site, i.e. the first website is BNG, when next-hop website is OLT, then without
Each OLT need to be corresponded to the business information entrained by the wavelength of business information and be sent to next-hop website, can only sent each
Business information entrained by the wavelength of BNG business information to be sent gives next-hop website.
So, in each website annular networking, the first website determines the wavelength of the first website business information to be sent
Afterwards, it is adjusted the business information entrained by the wavelength of the business information to be sent further according to the corresponding dispersion values in each residential site
The time slot of each residential site is distributed to, one can not carry out multiplex dispersion compensation compared with prior art, the embodiment of the present application can lead to
It crosses and dispersion compensation is carried out to the wavelength of business information to be sent in multiple time slots, dispersion compensation can not be carried out to solve multiplex
Problem.In addition, compared to the dispersion cross-interference issue between each website in Organization Chart shown in Figure 13, the distance between each website is caused to limit
In 20km, the embodiment of the present application can carry out dispersion compensation to each website respectively, to reduce the crosstalk of different websites, therefore
Distance between each website can reach 100km or farther.
It is above-mentioned that mainly scheme provided by the embodiments of the present application is described from the angle of the first website.It is appreciated that
It is that for the first website in order to realize above-mentioned function, it comprises execute the corresponding hardware configuration of each function and/or software module.
Those skilled in the art should be readily appreciated that, algorithm steps described in conjunction with the examples disclosed in this document, the application
It can be realized with the combining form of hardware or hardware and computer software.Some function is actually with hardware or computer software
It drives the mode of hardware to execute, depends on the specific application and design constraint of technical solution.Professional technician can be with
Each specific application is used different methods to achieve the described function, but this realization is it is not considered that exceed this Shen
Range please.
The embodiment of the present application can carry out first stop point according to the above method example division of function module, for example, can
Each function module is divided with each function of correspondence, two or more functions can also be integrated in a processing module
In.The form that hardware had both may be used in above-mentioned integrated module is realized, can also be realized in the form of software function module.It needs
It is noted that be schematical, only a kind of division of logic function to the division of module in the embodiment of the present application, it is practical real
It is current that there may be another division manner.
In the case where dividing each function module using corresponding each function, Figure 17 shows involved in above-described embodiment
And the first website 17 a kind of possible structural schematic diagram, the first website includes：Determination unit 1701, transmission unit 1702,
Allocation unit 1703, receiving unit 1704 and demodulating unit 1705.Determination unit 1701 is for supporting the first website to execute in Fig. 5
Process 504~506, the process 1404~1408 in Figure 14；Transmission unit 1702 is for supporting the first website to execute in Fig. 5
Process 507, the process 1409 in Figure 14；Allocation unit 1703 is for supporting the first website to execute the process 503, Figure 14 in Fig. 5
In process 1403；Receiving unit 1704 is for supporting the first website to execute the process 501 in Fig. 5, the process 1401 in Figure 14；
Demodulating unit 1705 is for supporting the first website to execute the process 502 in Fig. 5, the process 1402 in Figure 14.Wherein, the above method
All related contents for each step that embodiment is related to can quote the function description of corresponding function module, no longer superfluous herein
It states.
Using integrated unit, Fig. 4 shows one kind of the first website involved in above-described embodiment
Possible structural schematic diagram.First website includes：EDFA401, beam splitter 402, combiner device 403, OADM404 and line card
405。
When EDFA401 be amplifier, when OADM is multiplexer, line card 405 is processor, involved by the embodiment of the present application
First website can be the first website shown in Figure 18.
Refering to fig. 1 shown in 8, which includes：Amplifier 1801, combiner device 1803, is answered at beam splitter 1802
With device 1804, processor 1805 and bus 1806.Wherein, amplifier 1801, beam splitter 1802, combiner device 1803, multiple
It is connected with each other by bus 1806 with device 1804 and processor 1805；Bus 1806 can be Peripheral Component Interconnect standard
(Peripheral Component Interconnect, PCI) bus or expanding the industrial standard structure (Extended
Industry Standard Architecture, EISA) bus etc..The bus can be divided into address bus, data/address bus,
Controlling bus etc..For ease of indicating, only indicated with a thick line in Figure 18, it is not intended that an only bus or a type
Bus.
The step of method in conjunction with described in present disclosure or algorithm, can be realized in a manner of hardware, also may be used
It is realized in a manner of being to execute software instruction by processor.Software instruction can be made of corresponding software module, software mould
Block can be stored on random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read
Only Memory, ROM), Erasable Programmable Read Only Memory EPROM (Erasable Programmable ROM, EPROM), electricity can
Erasable programmable read-only memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM
(CD-ROM) or in the storage medium of any other form well known in the art.A kind of illustrative storage medium is coupled to place
Device is managed, to enable a processor to from the read information, and information can be written to the storage medium.Certainly, it stores
Medium can also be the component part of processor.Pocessor and storage media can be located in ASIC.In addition, the ASIC can position
In core network interface equipment.Certainly, pocessor and storage media, which can also be used as discrete assembly and be present in core network interface, sets
In standby.
Those skilled in the art are it will be appreciated that in said one or multiple examples, work(described herein
It can be realized with hardware, software, firmware or their arbitrary combination.It when implemented in software, can be by these functions
Storage in computer-readable medium or as on computer-readable medium one or more instructions or code be transmitted.
Computer-readable medium includes computer storage media and communication media, and wherein communication media includes convenient for from a place to another
Any medium of one place transmission computer program.It is any that storage medium can be that general or specialized computer can access
Usable medium.
Above-described specific implementation mode has carried out further the purpose, technical solution and advantageous effect of the application
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the application, is not used to limit the application
Protection domain, all any modification, equivalent substitution, improvement and etc. on the basis of the technical solution of the application, done should all
It is included within the protection domain of the application.
Claims (16)
1. a kind of method for returning access network more, which is characterized in that including：
First website determines the wavelength of the first website business information to be sent, the first website business information to be sent
Wavelength includes the corresponding subcarrier in each residential site, and according to the corresponding dispersion values in each residential site to each residential site pair
The subcarrier precompensation answered；
Business information entrained by subcarrier after each residential site precompensation is sent to next-hop by first website
Website.
2. according to the method described in claim 1, it is characterized in that, first website determines the first website industry to be sent
Before the wavelength for information of being engaged in, the method further includes：
Bandwidth of first website needed for each residential site is that subcarrier is distributed in each residential site, and estimates
Count the corresponding dispersion values in each residential site when sending the subcarrier distributed each residential site to each residential site.
3. according to the method described in claim 2, it is characterized in that, first website determines the first website industry to be sent
The wavelength for information of being engaged in, the wavelength of the first website business information to be sent includes the corresponding subcarrier in each residential site,
And include to each residential site corresponding subcarrier precompensation according to the corresponding dispersion values in each residential site：
First website determines that first website is to be sent according to the distribution principle that wavelength division multiplexed network medium wavelength does not conflict
The wavelength of business information；
First website is determined according to the corresponding dispersion values in each residential site by the corresponding sub- load in each residential site
Wave is sent to the bandwidth needed for each residential site；
First website is sent to the bandwidth needed for each residential site according to the corresponding subcarrier in each residential site
Adjust the subcarrier of each residential site distribution；
First website exchange it is whole after the corresponding subcarrier in each residential site according to the corresponding color in each residential site
Scattered value carries out dispersion pre-compensation respectively.
4. according to claim 1-3 any one of them methods, which is characterized in that the method further includes：
First website receives the wavelength that each Source Site that upper hop website is sent corresponds to business information；
First website demodulates the corresponding son of first website from the wavelength that each Source Site corresponds to business information
Carrier wave.
5. a kind of method for returning access network more, which is characterized in that including：
First website determines the wavelength of the first website business information to be sent, and according to the corresponding dispersion values in each residential site
Business information entrained by the wavelength of the business information to be sent is distributed to the time slot of each residential site by adjustment；
The first stop point is taken the wavelength of the business information to be sent according to the time slot of each residential site after adjustment
The business information of band is sent to next-hop website.
6. according to the method described in claim 5, it is characterized in that, determining that first website is to be sent in first website
Before the wavelength of business information, the method further includes：
Bandwidth of first website needed for each residential site is that time slot, and pre-estimation are distributed in each residential site
The corresponding dispersion values in each residential site when sending the wavelength of the business information to be sent to each residential site.
7. according to the method described in claim 6, it is characterized in that, first website determines the first website industry to be sent
The wavelength for information of being engaged in, and taken according to the wavelength that the corresponding dispersion values in each residential site adjust the business information to be sent
The time slot that the business information of band distributes to each residential site includes：
First website determines that first website is to be sent according to the distribution principle that wavelength division multiplexed network medium wavelength does not conflict
The wavelength of business information；
First website is determined according to the corresponding dispersion values in each residential site by the wavelength of the business information to be sent
It is sent to the bandwidth needed for each residential site according to the time slot of distribution；
First website is sent to each place according to by the wavelength of the business information to be sent according to the time slot of distribution
The time slot of each residential site distribution described in Bandwidth adjustment needed for website；
First website exchange it is whole after each residential site distribution time slot according to the corresponding dispersion in each residential site
Value carries out dispersion pre-compensation respectively, and the time slot of each residential site after progress dispersion pre-compensation is carried to will be described to be sent
Business information entrained by the wavelength of business information distributes to the time slot of each residential site.
8. according to the method described in claim 5-7, which is characterized in that the method further includes：
First website receives the wavelength that each Source Site that upper hop website is sent corresponds to business information；
The time slot that first website is distributed according to first website corresponds to the wavelength of business information from each Source Site
Middle demodulation first website corresponds to the wavelength of business information.
9. a kind of first website, which is characterized in that including：
Determination unit, the wavelength for determining the first website business information to be sent, the first website business information to be sent
Wavelength include the corresponding subcarrier in each residential site, and according to the corresponding dispersion values in each residential site to each residential site
Corresponding subcarrier precompensation；
Transmission unit, for the business information entrained by the subcarrier after each residential site precompensation to be sent to next-hop
Website.
10. the first website according to claim 9, which is characterized in that first website further includes：
Allocation unit is each residential site distribution subcarrier for the bandwidth needed for each residential site, and pre-
The corresponding dispersion in each residential site when estimating to send the subcarrier distributed each residential site to each residential site
Value.
11. the first website according to claim 10, which is characterized in that the determination unit is used for：
The distribution principle not conflicted according to wavelength division multiplexed network medium wavelength determines the wave of the first website business information to be sent
It is long；
According to the corresponding dispersion values in each residential site, determine the corresponding subcarrier in each residential site is sent to it is described
Bandwidth needed for each residential site；
It is each described in the Bandwidth adjustment being sent to needed for each residential site according to the corresponding subcarrier in each residential site
The subcarrier of residential site distribution；
The corresponding subcarrier in each residential site after adjustment is carried out respectively according to the corresponding dispersion values in each residential site
Dispersion pre-compensation.
12. the first website according to claim 9-11, which is characterized in that first website further includes：
Receiving unit, each Source Site for receiving the transmission of upper hop website correspond to the wavelength of business information；
Demodulating unit, for demodulating the corresponding son of first website from the wavelength that each Source Site corresponds to business information
Carrier wave.
13. a kind of first website, which is characterized in that including：
Determination unit, the wavelength for determining the first website business information to be sent, and according to the corresponding dispersion in each residential site
Value adjusts the time slot that the business information entrained by the wavelength of the business information to be sent is distributed to each residential site；
Transmission unit is taken the wavelength of the business information to be sent for the time slot according to each residential site after adjustment
The business information of band is sent to next-hop website.
14. the first website according to claim 13, which is characterized in that first website further includes：
Allocation unit is that time slot is distributed in each residential site, and estimates for the bandwidth needed for each residential site
Count the corresponding dispersion values in each residential site when sending the wavelength of the business information to be sent to each residential site.
15. the first website according to claim 14, which is characterized in that the determination unit is used for：
The distribution principle not conflicted according to wavelength division multiplexed network medium wavelength determines the wave of the first website business information to be sent
It is long；
According to the corresponding dispersion values in each residential site determine by the wavelength of the business information to be sent according to distribution when
Gap is sent to the bandwidth needed for each residential site；
According to the band being sent to the wavelength of the business information to be sent according to the time slot of distribution needed for each residential site
Width is adjusted to the time slot of each residential site distribution；
Color is carried out respectively according to the corresponding dispersion values in each residential site to the time slot of each residential site distribution after adjustment
Precompensation is dissipated, the time slot of each residential site after progress dispersion pre-compensation is carried to the wave of the business information to be sent
Long entrained business information distributes to the time slot of each residential site.
16. the first website according to claim 13-15, which is characterized in that first website further includes：
Receiving unit, each Source Site for receiving the transmission of upper hop website correspond to the wavelength of business information；
Demodulating unit, the time slot for being distributed according to the first website are solved from the wavelength that each Source Site corresponds to business information
First website is adjusted to correspond to the wavelength of business information.
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