CN103650380B - The crosstalk method and apparatus of cost of a kind of attenuating - Google Patents

The crosstalk method and apparatus of cost of a kind of attenuating Download PDF

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Publication number
CN103650380B
CN103650380B CN201380001090.XA CN201380001090A CN103650380B CN 103650380 B CN103650380 B CN 103650380B CN 201380001090 A CN201380001090 A CN 201380001090A CN 103650380 B CN103650380 B CN 103650380B
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signal
upper ripple
ripple signal
frequency spectrum
crosstalking
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CN103650380A (en
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宗良佳
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Optical Communication System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides the crosstalk method and apparatus of cost of a kind of reduction, comprising: join transmission path to upper ripple signal component; On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource be continuous and spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and; Dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacent; Join described coupling frequency spectrum resource to described upper ripple signal component, make described upper ripple signal group and the through connect signal next-door neighbour who dwindles filtering bandwidth; Due in the time dwindling through connect signal filtering bandwidth, can dwindle accordingly under Xia road after ripple signal, remain in the spectral components at through connect signal edge, thereby reduce crosstalk signal component, without reserved a part of bandwidth on coupling frequency spectrum resource, not only improve system spectral resources utilization rate, can also effectively suppress the cost of crosstalking.

Description

The crosstalk method and apparatus of cost of a kind of attenuating
Technical field
The present invention relates to optical communication technique field, relate in particular to a kind of reduction crosstalk method and the dress of costPut.
Background technology
Along with the development of the communication technology, point-to-point line communication subnet in traditional optical communication systemTopological structure cannot meet the demand of Communication Development, and whole topology of networks is gradually to wirelessNetwork grid (Mesh) is changed development. In order to ensure the transparency of optical-fiber network, avoid too much light-electricity-Light conversion, uses (DenseWavelengthDivisionMultiplexing, DWDM) at intensive multiplexed optical waveIn system, by Remote configuration ROADM (ReconfigurableOpticalAdd-DropMultiplexer, ROADM) parameter, make it carry out optics scheduling, can be dynamicUpper and lower service wavelength can respond rapidly in the time that network topology or service distribution change, and makes lightNetwork is more intelligent, realizes the flexible dispatching of business.
But the use meeting of RODAM brings the cost of crosstalking to the transmission of optical signal, the reason of its generationAs shown in Figure 1: for certain dimension in ROADM, need to descend road central wavelength lambda1, withThe service signal of an identical wavelength of Shi Shanglu. Due to wavelength-selective switches (WavelengthSelectiveSwitch, WSS) the imperfection of filter curve, select down the central wavelength lambda on road by WSS1Time, cannot be by original central wavelength lambda1Signal descend road completely, will produce one at the edge of this passageA little central wavelength lambda1Residual spectrum. Due to the central wavelength lambda on the upper ripple signal Yu Xia road of setting out on a journey1RippleAppearance is same, and upper ripple signal will occupy and central wavelength lambda1Identical frequency spectrum resource, therefore, centre wavelengthλ1Residual spectrum be the crosstalking of upper ripple signal, produced the cost of crosstalking. This is crosstalked and will followRipple signal and transmit together, because this crosstalk components has identical frequency spectrum with upper ripple component of signal,To be difficult to elimination once enter in ripple signal, thereby affect the transmission performance of service signal.
At present, in wdm system, crosstalk cost to OFDM (Orthogonal in order to suppressFrequencyDivisionMultiplexing, OFDM) impact of signal, conventional reduction is crosstalked generationThe method of valency is as shown in Figure 2: input signal, by ripple signal under road under ROADM, is supposed to lower roadLower ripple signal be 4 sub-carrier signals, because the wavelength-selective switches in ROADM can not providePerfectly filter curve, therefore, the original frequency spectrum marginal position of lower ripple signal still residualSpectral components, this spectral components becomes crosstalking of upper ripple signal. In order to reduce the cost of crosstalking, upperWhen road new upper ripple signal, reserved certain protection bandwidth between upper ripple signal and through connect signal,The subcarrier number of the upper ripple signal of setting out on a journey reduces, and has reduced the string of residual light spectral component to upper ripple signalDisturb. The subcarrier that the upper ripple signal of setting out on a journey as shown in Figure 3, is 3 same wavelength.
Said method reduces while crosstalking cost, has following shortcoming:
In order to suppress the cost of crosstalking, on setting out on a journey, ROADM when ripple signal, reserves certain protectionBandwidth, has caused the waste of system spectral resources;
Secondly, constant in order to ensure transmission capacity, on setting out on a journey, when ripple signal, need to adopt than lower rippleSignal is the modulation system of high-order more, and order of modulation is higher, and what identical residual light spectral component brought crosstalksCost is larger, the method can not well suppress to crosstalk impact of cost, and, adopt high-orderModulation system also can shorten the transmission range of signal.
Summary of the invention
In view of this, the invention provides the crosstalk method and apparatus of cost of a kind of reduction, without reservedProtection bandwidth can reduce the impact of the cost of crosstalking.
A kind of method that embodiment of the present invention first aspect provides reduction to crosstalk cost, described method comprises:
Join transmission path to upper ripple signal component, each upper ripple signal group comprises at least one transmission pathIdentical upper ripple signal;
On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and;
Dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacent;
Join described coupling frequency spectrum resource to described upper ripple signal component, make described upper ripple signal group and contractingThe through connect signal next-door neighbour of little filtering bandwidth.
In the possible embodiment of embodiment of the present invention first aspect the first, described on described transmission roadOn footpath, choosing a coupling frequency spectrum resource comprises:
On described transmission path, search with described on the identical through connect signal of ripple signal group transmission path;
Choose adjacent with a described through connect signal frequency spectrum resource that mates;
, dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacentComprise:
Dwindle the filtering bandwidth of the through connect signal identical with described upper ripple signal group transmission path.
In the possible embodiment of embodiment of the present invention first aspect the second, described upper ripple signal group bagDraw together the upper ripple signal that more than two and two transmission path is identical, will in described upper ripple signal group, be gone here and thereDisturb the minimum upper ripple signal of cost impact as the low susceptibility signal of crosstalking, described to described upper ripple signalComponent is joined described coupling frequency spectrum resource and is comprised:
The crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group crosstalks quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency deviation resource in described upper ripple signal groupRipple signal on other.
In conjunction with the possible embodiment of embodiment of the present invention first aspect the second, possible at the thirdIn embodiment, described upper ripple signal comprises two upper ripple signals that transmission path is identical, on describedThe cost of being crosstalked in ripple signal group affects a minimum upper ripple signal as the low susceptibility signal of crosstalking,The described crosstalk zone by described coupling frequency spectrum resource is distributed to low in described upper ripple signal group and is crosstalked quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency deviation resource in described upper ripple signal groupOn other, ripple signal comprises:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
In conjunction with the possible embodiment of embodiment of the present invention first aspect the second, possible at the 4th kindIn embodiment, described upper ripple signal group comprises the upper ripple signal that more than two transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects two minimum upper ripple signals as the low susceptibility of crosstalkingSignal, the described crosstalk zone by described coupling frequency spectrum resource is distributed to low in described upper ripple signal groupThe susceptibility signal of crosstalking, distributes to described upper ripple signal by the non-crosstalk zone of described coupling frequency deviation resourceOn other in group, ripple signal comprises:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
In conjunction with the 4th kind of possible implementation of embodiment of the present invention first aspect, possible at the 5th kindIn implementation, in the middle of being arranged in, the described upper ripple signal by other comprises:
Other upper ripple signal is arranged to both sides from centre successively according to order of modulation order from high to lowRow.
In conjunction with embodiment of the present invention first aspect to the 5th kind of possible implementation of first aspect,In six kinds of possible implementations, described in dwindle straight with described adjacent at least one of frequency spectrum resource of matingThe filtering bandwidth of messenger comprises:
Dwindle with described and mate at least one through connect signal that frequency spectrum resource is adjacent by wavelength-selective switchesFiltering bandwidth.
In conjunction with embodiment of the present invention first aspect to the 5th kind of possible implementation of first aspect,In seven kinds of possible implementations, describedly also comprise before joining transmission path to upper ripple signal component:
Each upper ripple signal is divided into a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
A kind of method that embodiment of the present invention second aspect provides reduction to crosstalk cost, described method comprises:
Join transmission path to upper ripple signal component, described upper ripple signal group comprises at least two transmission pathsIdentical upper ripple signal, affects minimum upper ripple signal by the cost of being crosstalked in described upper ripple signal group and doesFor the low susceptibility signal of crosstalking;
On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and;
The crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group crosstalks quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency spectrum resource in described upper ripple signal groupRipple signal on other.
In the possible implementation of embodiment of the present invention second aspect the first, described upper ripple signal comprisesTwo upper ripple signals that transmission path is identical, affect minimum by the cost of being crosstalked in described upper ripple signal groupA upper ripple signal as the low susceptibility signal of crosstalking, described crosstalking described coupling frequency spectrum resourceRegion allocation is given the low susceptibility signal of crosstalking in described upper ripple signal group, by described coupling frequency spectrum resourceNon-crosstalk zone distribute to ripple signal on other in described upper ripple signal group and comprise:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
In the possible embodiment of embodiment of the present invention second aspect the second, described upper ripple signal group bagDraw together the upper ripple signal that more than two transmission path is identical, by the cost shadow of being crosstalked in described upper ripple signal groupRing two minimum upper ripple signals as the low susceptibility signal of crosstalking, described by described coupling frequency spectrum resourceCrosstalk zone distribute to the low susceptibility signal of crosstalking in described upper ripple signal group, by described coupling frequentlyPartially the non-crosstalk zone of resource is distributed to ripple signal on other in described upper ripple signal group and is comprised:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal in described upper ripple signal group is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
In conjunction with embodiment of the present invention second aspect to the possible embodiment of second aspect the second,In three kinds of possible embodiments, describedly also comprise before joining transmission path to upper ripple signal component:
Each upper ripple signal is divided into a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
The device that the embodiment of the present invention third aspect provides a kind of reduction to crosstalk cost, described device comprises:
The first path distribution module, for joining transmission path, each upper ripple signal to upper ripple signal componentGroup comprises the upper ripple signal that at least one transmission path is identical;
First resource is chosen module, for choose a coupling frequency spectrum resource on described transmission path,Described coupling frequency spectrum resource is continuous and spectrum width is greater than all upper ripples in described upper ripple signal groupThe spectrum width of signal and;
Bandwidth is dwindled module, for dwindling and the described straight-through letter of adjacent at least one of frequency spectrum resource that matesNumber filtering bandwidth;
The first spectrum allocation module, for joining described coupling frequency spectrum resource to described upper ripple signal component,Make described upper ripple signal group and the through connect signal next-door neighbour who dwindles filtering bandwidth.
In the possible embodiment of embodiment of the present invention third aspect the first, described first resource is chosenModule comprises:
Search unit, on described transmission path, search with described on ripple signal group transmission path phaseSame through connect signal;
Choose unit, for choosing adjacent with a through connect signal frequency spectrum resource that mates;
Described bandwidth is dwindled module and is comprised:
Dwindle unit, for dwindling the filter of the through connect signal identical with described upper ripple signal group transmission pathWavestrip is wide.
In the possible embodiment of embodiment of the present invention third aspect the second, described upper ripple signal group bagDraw together the upper ripple signal that more than two and two transmission path is identical, will in described upper ripple signal group, be gone here and thereDisturb the minimum upper ripple signal of cost impact as the low susceptibility signal of crosstalking, described the first spectrum allocation mouldPiece comprises:
The first allocation units, for distributing to the crosstalk zone of described coupling frequency spectrum resource in described upper rippleThe low susceptibility signal of crosstalking in signal group, distributes to the non-crosstalk zone of described coupling frequency deviation resourceRipple signal on other in described upper ripple signal group.
In conjunction with the possible embodiment of embodiment of the present invention third aspect the second, possible at the thirdIn embodiment, described upper ripple signal comprises two upper ripple signals that transmission path is identical, on describedThe cost of being crosstalked in ripple signal group affects a minimum upper ripple signal as the low susceptibility signal of crosstalking,Described the first allocation units comprise:
First distributes subelement, for the region with through connect signal next-door neighbour by described coupling frequency spectrum resourceDistribute to the described low susceptibility signal of crosstalking, make described low susceptibility signal and the described straight-through letter of crosstalkingNumber next-door neighbour;
Second distributes subelement, for described coupling frequency spectrum resource and the described low susceptibility of crosstalking are believedNumber next-door neighbour's region allocation is to ripple signal another on, ripple signal and described low on another described in makingThe susceptibility signal of crosstalking next-door neighbour.
In conjunction with the possible embodiment of embodiment of the present invention third aspect the second, possible at the 4th kindIn embodiment, described upper ripple signal group comprises the upper ripple signal that more than two transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects two minimum upper ripple signals as the low susceptibility of crosstalkingSignal, described the first allocation units comprise:
Sequence subelement, for the upper ripple signal sequence to described upper ripple signal group, by two low stringsDisturb susceptibility signal and be arranged in two ends, in the middle of other upper ripple signal is arranged in;
The 3rd distributes subelement, for mating frequency spectrum money described in any one adjacent with through connect signalThe upper ripple signal group after arrangement is distributed in source, makes upper ripple signal group and described leading directly to after described arrangementSignal next-door neighbour.
In conjunction with the embodiment of the present invention third aspect to the 4th kind of possible embodiment of the third aspect, placeIn the 5th kind of possible implementation, state device and also comprise:
The first grouping module, for being divided into each upper ripple signal a upper ripple signal group;
Or,
For upper ripple signal identical transmission path being divided into a upper ripple signal group.
The device that embodiment of the present invention fourth aspect provides a kind of reduction to crosstalk cost, described device comprises:
The second path allocation module, for joining transmission path, described upper ripple signal to upper ripple signal componentGroup comprises at least two upper ripple signals that transmission path is identical, will in described upper ripple signal group, be crosstalked generationThe upper ripple signal of valency impact minimum is as the low susceptibility signal of crosstalking;
Secondary resource is chosen module, for choose a coupling frequency spectrum resource on described transmission path,Described coupling frequency spectrum resource is continuous and spectrum width is greater than all upper ripples in described upper ripple signal groupThe spectrum width of signal and;
The second spectrum allocation module, described in distributing to the crosstalk zone of described coupling frequency spectrum resourceThe low susceptibility signal of crosstalking in upper ripple signal group, divides the non-crosstalk zone of described coupling frequency spectrum resourceRipple signal on other described in dispensing in upper ripple signal group.
In the possible implementation of embodiment of the present invention fourth aspect the first, described upper ripple signal comprisesTwo upper ripple signals that transmission path is identical, affect minimum by the cost of being crosstalked in described upper ripple signal groupA upper ripple signal as the low susceptibility signal of crosstalking, described the second spectrum allocation module comprises:
The second allocation units, for dividing described coupling frequency spectrum resource and through connect signal next-door neighbour's regionThe low susceptibility signal of crosstalking described in dispensing, makes described low susceptibility signal and the described through connect signal of crosstalkingNext-door neighbour;
The 3rd allocation units, for by described coupling frequency spectrum resource and the described low susceptibility signal of crosstalkingNext-door neighbour's region allocation is to ripple signal another on, ripple signal and described low string on another described in makingDisturb susceptibility signal next-door neighbour.
In the possible embodiment of embodiment of the present invention fourth aspect the second, described upper ripple signal group bagDraw together the upper ripple signal that more than two transmission path is identical, by the cost shadow of being crosstalked in described upper ripple signal groupRing two minimum upper ripple signals as the low susceptibility signal of crosstalking, described the second spectrum allocation module bagDraw together:
Sequencing unit, for the upper ripple signal sequence to described upper ripple signal group, by two low crosstalkingSusceptibility signal is arranged in two ends, in the middle of other upper ripple signal in described upper ripple signal group is arranged in;
The 4th allocation units, for mating frequency spectrum resource by described in any one adjacent with through connect signalDistribute to the upper ripple signal group after arrangement, make upper ripple signal group and described straight-through letter after described arrangementNumber next-door neighbour.
In conjunction with embodiment of the present invention fourth aspect to the possible implementation of fourth aspect the second,In three kinds of possible implementations, described device also comprises:
The second grouping module, for being divided into each upper ripple signal a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
As shown in the above, the present invention has following beneficial effect:
A kind of method that the embodiment of the present invention provides attenuating to crosstalk cost, joins biography to upper ripple signal componentDefeated path; On described transmission path, choose a coupling frequency spectrum resource; Dwindle and the described frequency spectrum that matesThe filtering bandwidth of at least one through connect signal that resource is adjacent; Join described to described upper ripple signal componentJoin frequency spectrum resource, due in the time dwindling through connect signal filtering bandwidth, can dwindle accordingly ripple under Xia roadAfter signal, remain in the spectral components at through connect signal edge, thereby reduced the cost of crosstalking, withoutOn coupling frequency spectrum resource, reserved part protection bandwidth, has improved system intermediate frequency spectrum resource utilization;
A kind of method that the embodiment of the present invention also provides reduction to crosstalk cost, joins to upper ripple signal componentTransmission path, described upper ripple signal group comprises at least two upper ripple signals that transmission path is identical, by instituteState the cost of being crosstalked in ripple signal group and affect minimum upper ripple signal as the low susceptibility signal of crosstalking;On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is also continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and; Described in inciting somebody to actionThe crosstalk zone of coupling frequency spectrum resource is distributed to the low susceptibility signal of crosstalking in described upper ripple signal group,The non-crosstalk zone of described coupling frequency spectrum resource is distributed to ripple letter on other in described upper ripple signal groupNumber, because the impact of the low suffered residual light spectral component of susceptibility signal of crosstalking is less, by low crosstalk quickSensitivity signal is distributed in the crosstalk zone of residual light spectral component, will be gone here and there than the low susceptibility signal of crosstalkingThe height that disturbing cost affects large other susceptibility signal of crosstalking is distributed in the non-string that there is no residual light spectral componentDisturb region, without reserved certain protection bandwidth, upper ripple signal is without adopting than more high-order of lower ripple signalModulation system, effectively reduce the suffered cost of crosstalking of described upper ripple signal group, and do not haveWaste described coupling frequency spectrum resource.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below by rightIn embodiment or description of the Prior Art, the accompanying drawing of required use is briefly described, apparently,Accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain the attached of other according to these accompanying drawingsFigure.
Fig. 1 is the reason schematic diagram that prior art produces the cost of crosstalking;
Fig. 2 is the schematic diagram that prior art reduces the cost method of crosstalking;
Fig. 3 is the light that the upper ripple signal of different modulating form, different bit rates brings due to the cost of crosstalkingThe simulation result schematic diagram of signal to noise ratio cost;
Fig. 4 is crosstalk embodiment of the method one schematic flow sheet of cost of a kind of reduction of the present invention;
Fig. 5 is that the continuous spectrum signal of the present invention enters crosstalk signal signal after ripple under ROADM systemFigure;
Fig. 6 is that the continuous spectrum signal of the present invention enters under ROADM system idle frequency spectrum resource after rippleSchematic diagram;
Fig. 7 is that the present invention dwindles and described filter of mating at least one through connect signal that frequency spectrum resource is adjacentThe wide schematic diagram of wavestrip;
Fig. 8 (a) is the filtering that the present invention only dwindles through connect signal 2 and idle frequency spectrum resource 2 sides adjacentThe rear crosstalk signal schematic diagram of bandwidth 701;
Fig. 8 (b) is the filtering that the present invention only dwindles through connect signal 3 and idle frequency spectrum resource 2 sides adjacentThe rear crosstalk signal schematic diagram of bandwidth 702;
Fig. 8 (c) is that the present invention dwindles idle frequency spectrum resource 2 and through connect signal 2 and through connect signal simultaneouslyThe filtering bandwidth 701 of 3 sides adjacent and 702 rear crosstalk signal schematic diagrames;
Fig. 9 (a) is for first upper ripple signal group of the present invention and to dwindle the through connect signal 2 of filtering bandwidth tightAdjacent schematic diagram;
Fig. 9 (b) is for first upper ripple signal group of the present invention and to dwindle the through connect signal 3 of filtering bandwidth tightAdjacent schematic diagram;
Figure 10 is crosstalk embodiment of the method two schematic flow sheets of cost of a kind of reduction of the present invention;
Figure 11 (a) dwindles the through connect signal identical with described upper ripple signal group transmission path for the present inventionFiltering bandwidth schematic diagram;
Figure 11 (b) dwindles the through connect signal identical with described upper ripple signal group transmission path for the present inventionFiltering bandwidth after crosstalk signal schematic diagram;
Figure 12 (a) is that coupling frequency spectrum resource is distributed to the 4th upper ripple signal group schematic diagram by the present invention;
Figure 12 (b) is that coupling frequency spectrum resource is distributed to the 3rd upper ripple signal group schematic diagram by the present invention;
Figure 13 is crosstalk embodiment of the method three flow charts of cost of a kind of reduction of the present invention;
Figure 14 is idle frequency spectrum resource schematic diagram after ripple under the continuous spectrum signal of the present invention;
The region allocation that Figure 15 (a) is close to through connect signal 11 by coupling frequency spectrum resource 9 for the present invention toThe 5th upper ripple signal group schematic diagram;
The region allocation that Figure 15 (b) is close to through connect signal 12 by coupling frequency spectrum resource 9 for the present invention toThe 5th upper ripple signal group schematic diagram;
Figure 15 (c) illustrates for coupling frequency spectrum resource 8 is distributed to the 3rd upper ripple signal group by the present inventionFigure;
Figure 16 is crosstalk device embodiment tetra-structural representations of cost of a kind of reduction of the present invention;
Figure 17 is crosstalk device embodiment five structural representations of cost of a kind of reduction of the present invention;
Figure 18 is crosstalk device embodiment six structural representations of cost of a kind of reduction of the present invention;
Figure 19 is crosstalk device embodiment seven structural representations of cost of a kind of reduction of the present invention;
Figure 20 is crosstalk device embodiment seven structural representations of cost of a kind of reduction of the present invention.
Detailed description of the invention
In order to provide the implementation that can reduce the cost of crosstalking without reserved certain protection bandwidth, thisThe method and apparatus that bright embodiment provides a kind of attenuating to crosstalk cost, below in conjunction with Figure of description pairThe preferred embodiments of the present invention describe, and should be appreciated that preferred embodiment described herein only usesIn description and interpretation the present invention, be not intended to limit the present invention. And in the situation that not conflicting, thisFeature in embodiment and embodiment in application can combine mutually.
Below in conjunction with accompanying drawing, the specific embodiment of the invention is elaborated
First, to the upper ripple signal of different modulating form, different bit rates because the cost of crosstalking is broughtThe simulation result of OSNR cost describes.
Fig. 3 is the light that the upper ripple signal of different modulating form, different bit rates brings due to the cost of crosstalkingThe simulation result schematic diagram of signal to noise ratio cost. As can be seen from the figure: the non-return-to-zero of 10G bit rate is adjustedMake zero-the difference quadrature phase shift keying of form processed (nonreturntozero, NRZ), 40G bit rateModulation format (returntozerodifferentialquadraturereferencephaseshiftkey ing,And the palarization multiplexing QPSK modulation format of 100G bit rate RZ-DQPSK)（Polarizationdivisionmultiplexingquadraturephaseshiftkeying，PDM-QPSK) upper ripple signal, basically identical to the sensitivity of the cost of crosstalking, as shown in the figure, onState the OSNR (opticalsignalnoiseratio, OSNR) that three kinds of upper ripple signals produce 0.5dBSize that what cost was corresponding crosstalk is-20dB. At present, the nominal value of crosstalking of WSS is at-30dB～-35dBBetween. Therefore, for the modulation format of existing 10G, 40G and 100G bit rate, byThe string that under ROADM system, under road, after ripple signal, remaining spectral components brings the upper ripple signal of setting out on a journeyIt is not very obvious disturbing cost.
But, along with rapid growths such as Internet user's quantity, application kind and the network bandwidths, for fullFoot business demand is constantly to the network capacity extension, and 400G and even 1T will appear in the single channel circuit in optical-fiber networkDeng higher bit rate. In order to realize higher bit rate, need to adopt high-order modulating (as 16Quadrature amplitude modulation (quadratureamplitudemodulation, QAM), 32QAM etc.) orPerson adopt multi-carrier OFDM (Orthogonalfrequencydivisionmultiplexing,OFDM) technology. Therefore, bandwidth varying optical-fiber network (Flexiblebandwidthopticalnetwork,FBON) in, by the phenomenon of the upper ripple signal mixed transport of the multiple bit rate of appearance, more modulation form.
In the FBON of mixed transport, the modulation format of 10G, 40G and 100G bit rate upperRipple signal is subject to crosstalking the impact of cost still can be less. But, for the high order modulation in FBONUpper ripple signal, in the time producing identical OSNR cost, corresponding crossfire value size is less. As figureShown in 3, produce string corresponding to 0.5dBOSNR cost for the upper ripple signal of 16QAM modulation formatDisturbing size is-27dB. Same, for ripple signal on multicarrier, residual due to through connect signal edgeThe centre frequency of spectral components and edge carrier wave is very approaching, and therefore, residual light spectral component carries for edgeThe cost of crosstalking of ripple is also very large. In a word, in FBON, for high order modulation orRipple signal on multicarrier, the cost of crosstalking of being brought by ROADM is very important.
Low crosstalk susceptibility signal and the height susceptibility signal of crosstalking is a relative concept, is not oneAbsolute probability, in not every high order modulation, ripple signal is all the height susceptibility signal of crosstalking. On oneThe multiple upper ripple signal comprising in ripple signal group, the cost of being crosstalked affects less signal and is low stringDisturb susceptibility signal, the cost of being crosstalked affects larger signal and is the height susceptibility signal of crosstalking. For example,When the upper ripple signal of 16QAM modulation format is height while crosstalking susceptibility signal, the low susceptibility letter of crosstalkingNumber can be the upper ripple signal of 8QAM modulation format. For multicarrier modulated signal, no matter adoptUse which kind of modulation system, the cost that is subject to crosstalking is all larger, as the height susceptibility signal of crosstalking. OneIn individual upper ripple signal group, the cost of being crosstalked is affected on minimum one or two to ripple signal as low stringDisturb susceptibility signal, other upper ripple signal is as the height susceptibility signal of crosstalking.
It should be noted that, in the specific embodiment of the following stated of the present invention, the low susceptibility of crosstalkingSignal is taking low-order-modulated signal as example; Height is crosstalked susceptibility signal with high order modulation signal or multicarrier tuneSignal processed is example.
Embodiment mono-
Fig. 4 is crosstalk embodiment of the method one schematic flow sheet of cost of a kind of reduction of the present invention, described sideMethod comprises:
Step 401: join transmission path to upper ripple signal component, each upper ripple signal group comprises at least oneThe upper ripple signal that individual transmission path is identical.
Join transmission path to upper ripple signal component, divide namely to the each upper ripple signal of upper ripple signal groupJoin an identical routing iinformation.
In the time that one group of continuous spectrum signal enters ROADM system, described spectrum signal comprises directlyMessenger and lower ripple signal, this spectrum signal is by after WSS filtering, with lower ripple signal next-door neighbour'sThrough connect signal edge residual light spectral component, as shown in Figure 5.
In the time having multiple upper ripple signal in ROADM system, ripple signal on each independently can be doneBe a upper ripple signal group, in each upper ripple signal group, only have a upper ripple signal; Also can be by biographyThe identical upper ripple signal in defeated path is gone up ripple signal group as one, and each upper ripple signal group can be by oneOr the upper ripple signal that multiple transmission paths are identical. If when the upper ripple signal that transmission path is identical is more,Upper ripple signal identical this transmission path can also be divided into ripple signal on several according to actual needsGroup. Can also be according to actual needs, concrete qualifications is set multiple upper ripple signals are divided into groups,In each upper ripple signal group, the number of upper ripple signal also can be set voluntarily according to actual conditions.
Multiple upper ripple signals are divided into groups to illustrate, and supposing has 5 to go up ripples in ROADM systemSignal: upper ripple signal 1(100GPDM-QPSK), the two carrier wave 400G of upper ripple signal 2(PDM-16QAM), upper ripple signal 3(40GPDM-QPSK), upper ripple signal 4(40GPDM-QPSK), the two carrier wave 400GPDM-16QAM of upper ripple signal 5(), wherein, upper ripple signal1, the transmission path of upper ripple signal 2 and upper ripple signal 3 is identical, upper ripple signal 4 and upper ripple signal 5Transmission path identical.
When on to above-mentioned 5, ripple signal divides into groups, can be using each upper ripple signal on oneRipple signal group, has 5 upper ripple signal groups; Also upper ripple signal identical transmission path can be divided intoA upper ripple signal group, has 2 upper ripple signal groups, and on one of them, ripple signal group comprises ripple letterNumber 1, upper ripple signal 2 and upper ripple signal 3, on another, ripple signal group comprises ripple signal 4 and upperRipple signal 5.
Above-mentioned instantiation is just used for multiple upper ripple signals to divide into groups to illustrate, not only forIn above-mentioned packet mode, can also set voluntarily the side to multiple upper ripple signal groupings according to actual conditionsFormula.
In the embodiment of the present invention, adopt path-calculating element (pathcomputationelement, PCE)Join transmission path for upper ripple signal component, generally, preferentially choose the shortest transmission path.
Step 402: choose a coupling frequency spectrum resource on described transmission path, described coupling frequency spectrumResource be continuous and spectrum width to be greater than the frequency spectrum of all upper ripple signals in described upper ripple signal group wideDegree and.
Choose after transmission path, on transmission path, had multiple lower ripple signals, under each lower ripple signalBehind road, all will obtain an idle frequency spectrum resource, and as shown in Figure 6, give each upper ripple signal group from multipleIn idle frequency spectrum resource, choose a coupling frequency spectrum resource, selected idle frequency spectrum resource is distributed toUpper ripple signal. Described coupling frequency spectrum resource is one section of continuous frequency spectrum resource, and the frequency of frequency spectrum resourceSpectral width be greater than all upper ripple signals in described upper ripple signal group spectrum width and.
Illustrate, supposing has 5 to go up ripple signals in ROADM system: upper ripple signal 1(100GPDM-QPSK), the two carrier wave 400GPDM-16QAM of upper ripple signal 2(), upper ripple signal 3(40GPDM-QPSK), upper ripple signal 4(40GPDM-QPSK), the two carrier wave 400G of upper ripple signal 5( PDM-16QAM）。
In the time that each upper ripple signal is gone up ripple signal group as one, give the upper ripple letter at upper ripple signal 1 placeNumber component join one continuous, and spectrum width is greater than spectrum width frequently idle of ripple signal 1Spectrum resource is as coupling frequency spectrum resource; Join one continuously to the upper ripple signal component at upper ripple signal 2 places, and spectrum width be greater than ripple signal 2 spectrum width idle frequency spectrum resource as coupling frequentlySpectrum resource, joins to the upper ripple signal component at upper ripple signal 3, upper ripple signal 4 and upper ripple signal 5 placesCoupling frequency spectrum resource is similar, repeats no more here.
In the time upper ripple signal identical transmission path being divided into a upper ripple signal group, upper ripple signal 1,Upper ripple signal 2 and upper ripple signal 3 are as ripple signal group on first; Upper ripple signal 4 and upper ripple signal5 as second upper ripple signal group. Join a continuous idle frequency spectrum to ripple signal component on firstResource 2, and the spectrum width of idle frequency spectrum resource 2 be greater than ripple signal 1, upper ripple signal 2 and onThe spectrum width of the upper ripple signals of 3 three of ripple signals and, using idle frequency spectrum resource 2 as mating frequency spectrumResource. Join a continuous idle frequency spectrum resource 3 to second upper ripple signal component, and frequently idleThe spectrum width of spectrum resource 3 is greater than ripple signal 3 and 4 two upper ripple signal spectrum width of upper ripple signalAnd, using idle frequency spectrum resource 3 as mate frequency spectrum resource.
If satisfactory idle frequency spectrum resource has multiplely on transmission path, choose one of them conductCoupling frequency spectrum resource; If there is no satisfactory idle frequency spectrum resource on transmission path, be againOn this, ripple signal component is joined transmission path.
Step 403: dwindle and described filtering of mating at least one through connect signal that frequency spectrum resource is adjacentBandwidth.
In prior art, under the lower ripple signal in transmission path behind road, straight with lower ripple signal next-door neighbourThe residual a part of spectral components of edge of messenger, as shown in Figure 5, residual spectral components can be rightThe upper ripple signal that will set out on a journey produces the cost of crosstalking.
The embodiment of the present invention, when road, adopts the WSS of adaptive-bandwidth under the lower ripple signal in transmission pathDwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacent, specifically implementTime, can come real by the minimum change granularity (slicegranularity) of configuration Flex-ROADMExisting. General, minimum change granularity can be set to 12.5GHZ. As shown in Figure 7, suppose to chooseCoupling frequency spectrum resource be idle frequency spectrum resource 2 and the idle frequency spectrum that will produce behind road under lower ripple signalResource 3, can dwindle the filtering bandwidth 701 of through connect signal 2 and idle frequency spectrum resource 2 sides adjacentAnd at least one in the filtering bandwidth 702 of through connect signal 3 and idle frequency spectrum resource 2 sides adjacent,Dwindle filtering bandwidth 703 and the through connect signal 4 of through connect signal 3 and idle frequency spectrum resource 3 sides adjacentFiltering bandwidth 704 with idle frequency spectrum resource 3 sides adjacent.
Due to the imperfection of filter curve, dwindling the through connect signal adjacent with mating frequency spectrum resourceWhen filtering bandwidth, reduce the residual spectral signal of through connect signal edge simultaneously, thereby reduced residualCost that what the spectral signal staying produced crosstalk. To dwindle the straight-through letter adjacent with idle frequency spectrum resource 2Numbers 2 and through connect signal 3 at least the filtering bandwidth of any one through connect signal be example, as Fig. 8 (a)-8(c) shown in three width figure, Fig. 8 (a) is adjacent with idle frequency spectrum resource 2 for only dwindling through connect signal 2The rear schematic diagram of filtering bandwidth 701 of side, can find out the residual spectral components at through connect signal 2 edgesReduce; Fig. 8 (b) is for only dwindling the filtering bandwidth of through connect signal 3 and idle frequency spectrum resource 2 sides adjacent702 rear schematic diagrames, can find out that the residual spectral components at through connect signal 3 edges reduces; Fig. 8 (c)Believe with straight-through with the filtering bandwidth 701 of idle frequency spectrum resource 2 sides adjacent for dwindle through connect signal 2 simultaneouslyNumbers 3 with the rear schematic diagram of filtering bandwidth 702 of idle frequency spectrum resource 2 sides adjacent, can find out straight-through letterNumbers 2 and through connect signal 3 all subtract at the residual spectral components of the edge adjacent with idle frequency spectrum resource 2Few. Dwindle in the through connect signal 3 adjacent with idle frequency spectrum resource 3 and through connect signal 4 at least any oneFiltering bandwidth and the said method of individual through connect signal are similar, repeat no more here.
Residual spectral components in the time dwindling the filtering bandwidth of through connect signal, simultaneously by a filtering part,Thereby reduce the size of residual light spectral component, also just reduced crosstalking that residual light spectral component bringsCost, during without ripple signal on setting out on a journey, reserved part protection bandwidth can realize and reduce the cost of crosstalking.
Above-mentioned instantiation is just used for to dwindling the filtering band of the through connect signal that coupling frequency spectrum resource is adjacentWide illustrating, dwindles at least one through connect signal that other selected coupling frequency spectrum resources are adjacentFiltering bandwidth and above-mentioned example class seemingly, repeat here no longer one by one.
Step 404: join described coupling frequency spectrum resource to described upper ripple signal component, make described upper rippleSignal group and the through connect signal next-door neighbour who dwindles filtering bandwidth.
In the time setting out on a journey on first ripple signal group, the each upper ripple signal on first in ripple signal group existsAfter setting out on a journey, be closely adjacent to each other, make whole ripple signal group and the through connect signal that dwindles filtering bandwidth on firstNext-door neighbour. As Fig. 9 (a)-9(b) as shown in three width figure, 9(a) for ripple signal group on first with dwindleThe through connect signal 2 of filtering bandwidth is close to, 9(b) for ripple signal group on first with dwindle filtering bandwidthThrough connect signal 3 be close to. In the time that through connect signal 2 and through connect signal 3 all dwindle filtering bandwidth, firstIndividual upper ripple signal group can be close to by an optional through connect signal, similar with Fig. 9 (a) or Fig. 9 (b).Second the upper ripple signal group of setting out on a journey seemingly, repeats here no longer one by one with the ripple signal category on first of setting out on a journey.
As shown in the above, the embodiment of the present invention has following beneficial effect:
Join transmission path to upper ripple signal component; On described transmission path, choose a coupling frequency spectrum moneySource; Dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacent; Give instituteState ripple signal component and join described coupling frequency spectrum resource, due in the time dwindling through connect signal filtering bandwidth,Can dwindle accordingly under Xia road ripple signal time, remain in the spectral components at through connect signal edge, therebyReduce the cost of crosstalking, without reserving a part of bandwidth on coupling frequency spectrum resource, not only having improved beSystem frequency spectrum resource utilization rate, can also effectively suppress the cost of crosstalking.
Embodiment bis-
Figure 10 is crosstalk embodiment of the method two schematic flow sheets of cost of a kind of reduction of the present invention, with enforcementExample one is compared, and in embodiment bis-, crosstalk zone is distributed to the low susceptibility of crosstalking in upper ripple signal groupSignal, distributes to ripple signal on other in upper ripple signal group by non-crosstalk zone, and described method comprises:
Step 1001: upper ripple signal identical transmission path is divided into a upper ripple signal group.
Upper ripple signal identical transmission path is divided into a upper ripple signal group, can be to whole upper ripple signalAll upper ripple signal in group adopts identical transmission path, reduces single upper ripple signal and transmits instituteThe number of the transmission path taking, is convenient to multiple upper ripple signals transmit and receive.
Illustrate, supposing has 5 to go up ripple signals in ROADM system: upper ripple signal 6(100GPDM-QPSK), the two carrier wave 400GPDM-16QAM of upper ripple signal 7(), upper ripple signal 8(40GPDM-QPSK), upper ripple signal 9(40GPDM-QPSK), the two carrier wave 400G of upper ripple signal 10(PDM-16QAM). Upper ripple signal 6, upper ripple signal 7 are identical with upper ripple signal 8 transmission paths, pointBe the 3rd upper ripple signal group; Upper ripple signal 9 is identical with upper ripple signal 10 transmission paths, is divided into the 4thIndividual upper ripple signal group.
Step 1002: join transmission path to upper ripple signal component, described upper ripple signal group comprises at least oneThe upper ripple signal that individual transmission path is identical.
Similar with embodiment mono-herein, the explanation in reference example one, repeats no more here.
Step 1003: on described transmission path, search with described on ripple signal group transmission path identicalThrough connect signal.
Step 1004: choose adjacent with a described through connect signal frequency spectrum resource that mates.
Described coupling frequency spectrum resource is continuous and spectrum width is greater than in described upper ripple signal group allThe spectrum width of upper ripple signal and.
Because described through connect signal has identical transmission path with upper ripple signal group, therefore, near upper rippleThe through connect signal marginal portion of signal group is follow-up when the ROADM system, and WSS can be to not describedThrough connect signal carries out filtering processing, and the upper ripple signal in through connect signal and upper ripple signal group can entirety pass through,Thereby reduce filtering cost.
As shown in Figure 11 (a) shows, through connect signal 6 is identical with the transmission path of the 3rd upper ripple signal group,The adjacent idle frequency spectrum resource of through connect signal 65 is greater than the 3rd upper ripple for continuous and spectrum widthIn signal group the spectrum width of upper ripple signal 6, upper ripple signal 7 and upper ripple signal 8 and, chooseIdle frequency spectrum resource 5 is the coupling frequency spectrum resource of the 3rd upper ripple signal group. Through connect signal 7 and the 4thThe transmission path of individual upper ripple signal group is identical, and the idle frequency spectrum resource 6 that through connect signal 7 is adjacent is continuousAnd spectrum width be greater than the frequency spectrum of upper ripple signal 9 and upper ripple signal 10 in the 4th upper ripple signal groupWidth and, choose idle frequency spectrum resource 6 and be the coupling frequency spectrum resource of the 4th upper ripple signal group.
Step 1005: the filtering band that dwindles the through connect signal identical with described upper ripple signal group transmission pathWide.
In the time dwindling the filtering bandwidth of described identical with upper ripple signal group transmission path through connect signal, onlyDwindle described through connect signal and a side of mating frequency spectrum resource next-door neighbour, an other side can not carried outDwindle the processing of filtering bandwidth.
As shown in Figure 11 (a) shows, dwindle the side 1101 that through connect signal 6 and idle frequency spectrum resource 5 are close toFiltering bandwidth, and dwindle the filter of the side 1102 that through connect signal 7 and idle frequency spectrum resource 6 be close toWavestrip is wide, dwindles after filtering bandwidth as shown in Figure 11 (b).
Step 1006: the crosstalk zone of described coupling frequency spectrum resource is distributed in described upper ripple signal groupThe low susceptibility signal of crosstalking, the non-crosstalk zone of described coupling frequency deviation resource is distributed to described upper rippleRipple signal on other in signal group.
Wherein, described other upper ripple signal comprise other the low susceptibility signal of crosstalking, crosstalk than lowThe susceptibility signal cost of being crosstalked affects large height and crosstalks on susceptibility signal and multicarrier in ripple signalAny one or multiple.
In the time only having a upper ripple signal in upper ripple signal group, a upper ripple signal and embodiment mono-set out on a journeyIdentical, repeat no more here.
Described upper ripple signal group comprises the upper ripple signal that more than two and two transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects minimum upper ripple signal and believes as the low susceptibility of crosstalkingNumber, the crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group and crosstalk quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency deviation resource in described upper ripple signal groupRipple signal on other, has two kinds of concrete situations:
The first situation, when described upper ripple signal comprises two upper ripple signals that transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects a minimum upper ripple signal as the low susceptibility of crosstalkingSignal:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
Start the explanation of simulation result at description embodiment known, in FBON, low crosstalkingThe impact of the cost of crosstalking that the residual light spectral component that susceptibility signal is subject to brings is less, but forRipple signal on high order modulation or multicarrier, the cost of crosstalking of being brought by ROADM is larger, is can notIgnore. Therefore, for the impact of crosstalk reduction cost on upper ripple signal, by described coupling frequency spectrum moneyIn source, give the described low susceptibility signal of crosstalking with through connect signal next-door neighbour's region allocation, that is to say, willCrosstalk zone is distributed to the low susceptibility signal of crosstalking. Ripple signal on another of upper ripple signal group, canFor the low susceptibility signal of crosstalking, affect large height and crosstalk quick than the low susceptibility signal of the crosstalking cost of being crosstalkedAny one on sensitivity signal or multicarrier in ripple signal, by described coupling frequency spectrum resource with instituteState the low susceptibility signal next-door neighbour's that crosstalks region allocation to ripple signal on another. Owing to there being residual spectrumThe crosstalk zone of component is very little, is generally 1 minimum change granularity, i.e. 12.5GHz. A low stringDisturb susceptibility signal and can be coated with the crosstalk zone of residual light spectral component completely. Therefore, on anotherRipple signal and the described low susceptibility signal next-door neighbour that crosstalks, can be in non-crosstalk zone.
As shown in Figure 12 (a), coupling frequency spectrum resource is distributed to the 4th upper ripple signal group, upper ripple letterThe side that numbers 9 next-door neighbour's through connect signals 7 have dwindled filtering bandwidth, ripple signal 10 and upper ripple letter on two carrier wavesNumbers 9 next-door neighbours. As can be seen from the figure, the low susceptibility signal 9 of crosstalking, non-crosstalking are distributed in crosstalk zoneDistinguish the high susceptibility signal 10 of crosstalking of dispensing.
The second situation: when described upper ripple signal group comprises the upper ripple letter that more than two transmission path is identicalNumber, the cost of being crosstalked in described upper ripple signal group is affected to two minimum upper ripple signals and crosstalk as lowSusceptibility signal:
To the upper ripple signal sequence in described upper ripple signal group, two costs of being crosstalked are affected minimumUpper ripple signal is arranged in two ends as the low susceptibility signal of crosstalking, during other upper ripple signal is arranged inBetween;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
In FBON, what the residual light spectral component that the low susceptibility signal of crosstalking is subject to brought crosstalks generationThe impact of valency is less, but for ripple signal on high order modulation or multicarrier, is brought by ROADMThe cost of crosstalking larger, be very important. To the upper ripple signal sequence in upper ripple signal group, twoThe low susceptibility signal of crosstalking is arranged in respectively two ends, in the middle of other upper ripple signal is arranged in, like this,When described coupling frequency spectrum resource is distributed to upper ripple signal group, be close to any one and the described frequency spectrum that matesThe through connect signal that resource is adjacent. Two low susceptibility signals of crosstalking in upper ripple signal group are as guarantorProtect the barrier of ripple signal on other.
As shown in Figure 12 (b), coupling frequency spectrum resource is distributed to the 3rd upper ripple signal group, give theThree upper ripple signals in three upper ripple signal groups sort, by upper ripple signal 6 and the upper ripple of low orderSignal 8 is arranged in respectively both sides, in the middle of the upper ripple signal 7 of high-order is arranged in, will mate frequency spectrum moneyThe 3rd upper ripple signal group after arrangement distributed in source. As can be seen from Figure, the upper ripple signal of low orderThe side that 6 are positioned at through connect signal 6 dwindles filtering bandwidth, i.e. crosstalk zone, the upper ripple signal 7 of high-orderBe positioned at non-crosstalk zone, the upper ripple signal 8 of low order is close to the edge of through connect signal 3, is positioned at crosstalk zone.The upper ripple signal 6 of low order and upper ripple signal 8 are equivalent to the crosstalk barrier of susceptibility signal 7 of height, makeRipple signal 7 is not subject to the impact of residual spectral components, is assigned to the non-crosstalk zone of coupling frequency spectrum resource.
Optionally, by other upper ripple signal according to order of modulation order from high to low from centre to twoLimit is arranged in order.
To on when upper ripple signal sequence in ripple signal group, if the upper ripple signal in upper ripple signal groupNumber is a lot, selects arbitrarily two low susceptibility signals of crosstalking to be arranged in respectively two ends, by other upper rippleSignal is arranged in order to both sides from centre according to order of modulation order from high to low.
Illustrate, suppose that other upper ripple signal comprises five upper ripple signals, order of modulation is respectively32QAM, 16QAM, 16QAM, 8QAM and 8QAM, be 32QAM by order of modulationUpper ripple signal is placed on middle, and a both sides order of modulation of each placement of the upper ripple signal of 32QAM isThe upper ripple signal of 16QAM, the upper ripple signal that is 8QAM by two order of modulation is arranged in respectively twoEnd.
Embodiment tri-
Figure 13 is crosstalk embodiment of the method three flow charts of cost of a kind of reduction of the present invention, with embodiment mono-Compare with embodiment bis-, embodiment tri-is without the filtering bandwidth that dwindles through connect signal, and described method comprises:
Step 1301: join transmission path to upper ripple signal component, described upper ripple signal group comprises at least twoThe upper ripple signal that individual transmission path is identical, affects the cost of being crosstalked in described upper ripple signal group minimumUpper ripple signal is as the low susceptibility signal of crosstalking.
Join transmission path to upper ripple signal component, divide namely to the each upper ripple signal of upper ripple signal groupJoin an identical routing iinformation.
In the time at least comprising two upper ripple signals in ROADM system, by upper ripple identical transmission pathSignal is as a upper ripple signal group, and each upper ripple signal group at least comprises that two transmission paths are identicalUpper ripple signal.
Multiple upper ripple signals are divided into groups to illustrate, and supposing has 5 to go up ripples in ROADM systemSignal: upper ripple signal 11(40GPDM-QPSK), the two carrier wave 400G of upper ripple signal 12(PDM-16QAM), upper ripple signal 13(100GPDM-QPSK), the two carrier waves of upper ripple signal 14(400GPDM-16QAM), upper ripple signal 15(40GPDM-QPSK), wherein, upper ripple signal 11Identical with the transmission path of upper ripple signal 12, upper ripple signal 13, upper ripple signal 14 and upper ripple signal15 transmission path is identical. Upper ripple signal 11 and upper ripple signal 12 are assigned to the 5th upper ripple signalGroup, assigns to the 6th upper ripple signal group by upper ripple signal 13, upper ripple signal 14 and upper ripple signal 15.Be that the 5th upper ripple signal group and the 6th upper ripple signal component do not distribute a transmission path, be theEach upper ripple signal in five upper ripple signal groups and the 6th upper ripple signal group distributes a route letterBreath, wherein, the routing iinformation that two upper ripple signals in the 5th upper ripple signal group distribute is identical;The routing iinformation that three upper ripple signals in the 6th upper ripple signal group distribute is identical.
In the embodiment of the present invention, adopt road unit (pathcomputationelement, PCE) as calculatedJoin transmission path for upper ripple signal component, generally, preferentially choose the shortest transmission path.
Step 1302: choose a coupling frequency spectrum resource on described transmission path, described coupling frequency spectrumResource be continuous and spectrum width to be greater than the frequency spectrum of all upper ripple signals in described upper ripple signal group wideDegree and.
Choose after transmission path, on transmission path, had multiple lower ripple signals, under each lower ripple signalBehind road, all will obtain an idle frequency spectrum resource, and as shown in figure 14, give each upper ripple signal group from multipleIn idle frequency spectrum resource, choose a coupling frequency spectrum resource, selected idle frequency spectrum resource is distributed toUpper ripple signal. Described coupling frequency spectrum resource is one section of continuous frequency spectrum resource, and the frequency of frequency spectrum resourceSpectral width be greater than all upper ripple signals in described upper ripple signal group spectrum width and.
Upper ripple signal 11 and upper ripple signal 12 are assigned to the 5th upper ripple signal group, give the 5th upper ripple letterNumber component is joined a continuous idle frequency spectrum resource 9, and the spectrum width of idle frequency spectrum resource 9 is largeIn 12 two upper ripple signal spectrum width of upper ripple signal 11 and upper ripple signal and, idle frequency spectrum is providedSource 9 is as coupling frequency spectrum resource. Upper ripple signal 13, upper ripple signal 14 and upper ripple signal 15 are assigned toThe 6th upper ripple signal group, joins a continuous idle frequency spectrum resource 8 to the 6th upper ripple signal component,And the spectrum width of idle frequency spectrum resource 8 is greater than ripple signal 13, upper ripple signal 14 and upper rippleThe spectrum width of the upper ripple signals of 15 3 of signals and.
If satisfactory idle frequency spectrum resource has multiplely on transmission path, choose one of them conductCoupling frequency spectrum resource; If there is no satisfactory idle frequency spectrum resource on transmission path, be againOn this, ripple signal component is joined transmission path.
Step 1303: the crosstalk zone of described coupling frequency spectrum resource is distributed in described upper ripple signal groupThe low susceptibility signal of crosstalking, the non-crosstalk zone of described coupling frequency spectrum resource is distributed to described upper rippleRipple signal on other in signal group.
Wherein, described other upper ripple signal comprise the low susceptibility signal of crosstalking, than the low susceptibility of crosstalkingThe signal cost of being crosstalked affects large height any one in the ripple signal on susceptibility signal and multicarrier of crosstalkingKind or multiple.
Described upper ripple signal group comprises the upper ripple signal that more than two and two transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects minimum upper ripple signal and believes as the low susceptibility of crosstalkingNumber, the crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group and crosstalk quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency spectrum resource in described upper ripple signal groupRipple signal on other, has two kinds of concrete situations:
The first situation, when described upper ripple signal comprises two upper ripple signals that transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects a minimum upper ripple signal as the low susceptibility of crosstalkingSignal:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
Start the explanation of simulation result at description embodiment known, in FBON, low crosstalkingThe impact of the cost of crosstalking that the residual light spectral component that susceptibility signal is subject to brings is less, but forRipple signal on high order modulation or multicarrier, the cost of crosstalking of being brought by ROADM is larger, is can notIgnore. Therefore, for the impact of crosstalk reduction cost on upper ripple signal, by described coupling frequency spectrum moneyIn source, give the described low susceptibility signal of crosstalking with through connect signal next-door neighbour's region allocation, make described low stringDisturb susceptibility signal and described through connect signal next-door neighbour, that is to say, the low susceptibility signal of crosstalking is positioned at stringDisturb region. Ripple signal on another of upper ripple signal group, can be for the low susceptibility signal of crosstalking, than lowThe susceptibility signal of the crosstalking cost of being crosstalked affects the large height ripple on susceptibility signal or multicarrier of crosstalking and believesAny one in number, by described coupling frequency spectrum resource with the described low susceptibility signal next-door neighbour's of crosstalkingRegion allocation is to ripple signal on another. Owing to having, the crosstalk zone of residual light spectral component is very little, generalBe 1 minimum change granularity, i.e. 12.5GHz. A low susceptibility signal of crosstalking can cover completelyThere is the crosstalk zone of residual light spectral component. Therefore, on another, ripple signal needs only described low the crosstalking of next-door neighbourSusceptibility signal, can be in non-crosstalk zone.
As shown in Figure 15 (a) shows, coupling frequency spectrum resource 9 is distributed to the 5th upper ripple signal group, upper rippleSignal 11 is close to through connect signal 11, and upper ripple signal 12 is close to upper ripple signal 11. Can from figureGo out, the low susceptibility signal 11 of crosstalking is positioned at the crosstalk zone that has residual light spectral component, crosstalk susceptibility letter of heightNumbers 12 are positioned at non-crosstalk zone.
Or, as shown in Figure 15 (b), coupling frequency spectrum resource 9 is distributed to the 5th upper ripple signalGroup, upper ripple signal 11 is close to through connect signal 12, and upper ripple signal 12 is close to upper ripple signal 11. From figureIn can find out, the low susceptibility signal 11 of crosstalking is positioned at the crosstalk zone that has residual light spectral component, height is crosstalkedSusceptibility signal 12 is positioned at non-crosstalk zone.
The second situation: when described upper ripple signal group comprises the upper ripple letter that more than two transmission path is identicalNumber, and the cost of being crosstalked in described upper ripple signal group is affected to two minimum upper ripple signals as low stringDisturb susceptibility signal:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
In FBON, what the residual light spectral component that the low susceptibility signal of crosstalking is subject to brought crosstalks generationThe impact of valency is less, but for ripple signal on high order modulation or multicarrier, is brought by ROADMThe cost of crosstalking larger, be very important. To the upper ripple signal sequence in upper ripple signal group, twoThe low susceptibility signal of crosstalking is arranged in respectively two ends, in the middle of other upper ripple signal is arranged in, like this,When described coupling frequency spectrum resource is distributed to upper ripple signal group, be close to any one and the described frequency spectrum that matesThe through connect signal that resource is adjacent. Two low susceptibility signals of crosstalking in upper ripple signal group are as guarantorProtect the barrier of ripple signal on other.
As shown in Figure 15 (c), coupling frequency spectrum resource 8 is distributed to the 3rd upper ripple signal group, give theThree upper ripple signals in six upper ripple signal groups sort, by upper ripple signal 13 and the upper ripple of low orderSignal 14 is arranged in respectively both sides, and height is crosstalked in the middle of susceptibility signal 18 is arranged in, and will mate frequencySpectrum resource 8 is distributed to the 6th upper ripple signal group after arrangement. As can be seen from Figure, low order is upperRipple signal 13 is close to through connect signal 10, goes up ripple signal 13 and is positioned at crosstalk zone, the upper ripple letter of high-orderNumbers 14 are positioned at non-crosstalk zone, and the upper ripple signal 15 of low order is close to the upper ripple signal 14 of high-order. Low orderUpper ripple signal 13 and upper ripple signal 15 be equivalent to the crosstalk barrier of susceptibility signal 14 of height, makes high-orderUpper ripple signal 14 is not subject to the impact of residual spectral components, is positioned at non-crosstalk zone. Certainly low order,The position of upper ripple signal 13 and upper ripple signal 15 can exchange.
Optionally, by other upper ripple signal according to order of modulation order from high to low from centre to twoLimit is arranged in order.
To on when upper ripple signal sequence in ripple signal group, if the upper ripple signal in upper ripple signal groupNumber is a lot, selects arbitrarily two low susceptibility signals of crosstalking to be arranged in respectively two ends, by other upper rippleSignal is arranged in order to both sides from centre according to order of modulation order from high to low.
Illustrate, suppose that other upper ripple signal comprises five upper ripple signals, order of modulation is respectively32QAM, 16QAM, 16QAM, 8QAM and 8QAM, be 32QAM by order of modulationUpper ripple signal is placed on middle, and a both sides order of modulation of each placement of the upper ripple signal of 32QAM isThe upper ripple signal of 16QAM, the upper ripple signal that is 8QAM by two order of modulation is arranged in respectively twoEnd. Certainly, the position of the upper ripple signal in same order of modulation level can exchange, foregoing descriptionIn, the position of the upper ripple signal that two order of modulation are 16QAM can exchange, and order of modulation isTwo upper ripple signal locations of 8QAM can exchange.
Embodiment tetra-
Figure 16 is crosstalk device embodiment tetra-structural representations of cost of a kind of reduction of the present invention, embodimentThe 4th, with the corresponding device of method in embodiment mono-, described device comprises:
The first path distribution module 1601, for joining transmission path, each upper ripple to upper ripple signal componentSignal group comprises the upper ripple signal that at least one transmission path is identical.
First resource is chosen module 1602, for choose a coupling frequency spectrum money on described transmission pathSource, described coupling frequency spectrum resource is continuous and spectrum width is greater than in described upper ripple signal group allThe spectrum width of upper ripple signal and.
Bandwidth is dwindled module 1603, straight with described adjacent at least one of frequency spectrum resource of mating for dwindlingThe filtering bandwidth of messenger.
The first spectrum allocation module 1604, for joining described coupling frequency spectrum money to described upper ripple signal componentSource, makes described upper ripple signal group and the through connect signal next-door neighbour who dwindles filtering bandwidth.
Embodiment five
Figure 17 is crosstalk device embodiment five structural representations of cost of a kind of reduction of the present invention, embodimentThe 5th, with the corresponding device of method in embodiment bis-, described device comprises:
The first grouping module 1701, for being divided into each upper ripple signal a upper ripple signal group; Or,For upper ripple signal identical transmission path being divided into a upper ripple signal group.
The first path distribution module 1601, for joining transmission path, each upper ripple to upper ripple signal componentSignal group comprises the upper ripple signal that at least one transmission path is identical.
First resource is chosen module 1602, for choose a coupling frequency spectrum money on described transmission pathSource, described coupling frequency spectrum resource is continuous and spectrum width is greater than in described upper ripple signal group allThe spectrum width of upper ripple signal and.
Described first resource is chosen module 1602 and is comprised:
Search unit 1702, on described transmission path, search with described on ripple signal group transmission roadThe through connect signal that footpath is identical;
Choose unit 1703, for choosing adjacent with a through connect signal frequency spectrum resource that mates.
Bandwidth is dwindled module 1603, straight with described adjacent at least one of frequency spectrum resource of mating for dwindlingThe filtering bandwidth of messenger.
Described bandwidth is dwindled module 1603 and is comprised:
Dwindle unit 1704, for dwindling the through connect signal identical with described upper ripple signal group transmission pathFiltering bandwidth.
The first spectrum allocation module 1604, for joining described coupling frequency spectrum money to described upper ripple signal componentSource, makes described upper ripple signal group and the through connect signal next-door neighbour who dwindles filtering bandwidth.
When described upper ripple signal group comprises the upper ripple signal that more than two and two transmission path is identical,The cost of being crosstalked in described upper ripple signal group is affected to minimum upper ripple signal to be believed as the low susceptibility of crosstalkingNumber, described the first spectrum allocation module 1604 comprises:
The first allocation units 1705, described in distributing to the crosstalk zone of described coupling frequency spectrum resourceThe low susceptibility signal of crosstalking in upper ripple signal group, divides the non-crosstalk zone of described coupling frequency deviation resourceRipple signal on other described in dispensing in upper ripple signal group.
Optionally, when described upper ripple signal comprises two upper ripple signals that transmission path is identical, described in inciting somebody to actionThe cost of being crosstalked in upper ripple signal group affects a minimum upper ripple signal and believes as the low susceptibility of crosstalkingNumber, described the first allocation units 1705 comprise:
First distributes subelement, for the region with through connect signal next-door neighbour by described coupling frequency spectrum resourceDistribute to the described low susceptibility signal of crosstalking, make described low susceptibility signal and the described straight-through letter of crosstalkingNumber next-door neighbour;
Second distributes subelement, for described coupling frequency spectrum resource and the described low susceptibility of crosstalking are believedNumber next-door neighbour's region allocation is to ripple signal another on, ripple signal and described low on another described in makingThe susceptibility signal of crosstalking next-door neighbour.
Optionally, described upper ripple signal group comprises the upper ripple signal that more than two transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects two minimum upper ripple signals as the low susceptibility of crosstalkingSignal, described the first allocation units 1705 comprise:
Sequence subelement, for the upper ripple signal sequence to described upper ripple signal group, by two low stringsDisturb susceptibility signal and be arranged in two ends, in the middle of other upper ripple signal is arranged in;
The 3rd distributes subelement, for mating frequency spectrum money described in any one adjacent with through connect signalThe upper ripple signal group after arrangement is distributed in source, makes upper ripple signal group and described leading directly to after described arrangementSignal next-door neighbour.
Embodiment six
Figure 18 is crosstalk device embodiment six structural representations of cost of a kind of reduction of the present invention, embodimentThe 6th, with the corresponding device of method in embodiment tri-, described device comprises:
The second path allocation module 1801, for joining transmission path, each upper ripple to upper ripple signal componentSignal group comprises at least two upper ripple signals that transmission path is identical, will in described upper ripple signal group, be gone here and thereDisturb the minimum upper ripple signal of cost impact as the low susceptibility signal of crosstalking.
Secondary resource is chosen module 1802, for choose a coupling frequency spectrum money on described transmission pathSource, described coupling frequency spectrum resource is continuous and spectrum width is greater than in described upper ripple signal group allThe spectrum width of upper ripple signal and.
Optionally, described upper ripple signal comprises two upper ripple signals that transmission path is identical, on describedThe cost of being crosstalked in ripple signal group affects a minimum upper ripple signal as the low susceptibility signal of crosstalking,Described the second spectrum allocation module 1802 comprises:
The second allocation units, for dividing described coupling frequency spectrum resource and through connect signal next-door neighbour's regionThe low susceptibility signal of crosstalking described in dispensing, makes described low susceptibility signal and the described through connect signal of crosstalkingNext-door neighbour;
The 3rd allocation units, for by described coupling frequency spectrum resource and the described low susceptibility signal of crosstalkingNext-door neighbour's region allocation is to ripple signal another on, ripple signal and described low string on another described in makingDisturb susceptibility signal next-door neighbour.
Optionally, described upper ripple signal group comprises the upper ripple signal that more than two transmission path is identical, willThe cost of being crosstalked in described upper ripple signal group affects two minimum upper ripple signals as the low susceptibility of crosstalkingSignal, described the second spectrum allocation module 1802 comprises:
Sequencing unit, for the upper ripple signal sequence to described upper ripple signal group, by two low crosstalkingSusceptibility signal is arranged in two ends, in the middle of other upper ripple signal in described upper ripple signal group is arranged in;
The 4th allocation units, for mating frequency spectrum resource by described in any one adjacent with through connect signalDistribute to the upper ripple signal group after arrangement, make upper ripple signal group and described straight-through letter after described arrangementNumber next-door neighbour.
The second spectrum allocation module 1803, for distributing to the crosstalk zone of described coupling frequency spectrum resourceThe low susceptibility signal of crosstalking in described upper ripple signal group, by the non-crosstalk zone of described coupling frequency spectrum resourceRipple signal on other in described upper ripple signal group is distributed in territory.
Optionally, described device also comprises:
The second grouping module, for being divided into each upper ripple signal a upper ripple signal group; Or, willThe upper ripple signal that transmission path is identical is divided into a upper ripple signal group.
Embodiment seven
Figure 19 is crosstalk device embodiment seven structural representations of cost of a kind of reduction of the present invention, described dressPut and comprise first memory 1901 and first processor 1902, described first memory 1901 is for depositingStorage instruction, described first processor 1902 is for transferring instruction, and described instruction comprises:
Join transmission path to upper ripple signal component, each upper ripple signal group comprises at least one transmission pathIdentical upper ripple signal;
On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and;
Described on described transmission path, choose one coupling frequency spectrum resource comprise:
On described transmission path, search with described on the identical through connect signal of ripple signal group transmission path;
Choose adjacent with a described through connect signal frequency spectrum resource that mates;
, dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacentComprise:
Dwindle the filtering bandwidth of the through connect signal identical with described upper ripple signal group transmission path;
Join described coupling frequency spectrum resource to described upper ripple signal component, make described upper ripple signal group and contractingThe through connect signal next-door neighbour of little filtering bandwidth.
Described upper ripple signal group comprises the upper ripple signal that more than two and two transmission path is identical,, willThe cost of being crosstalked in described upper ripple signal group affects minimum upper ripple signal and believes as the low susceptibility of crosstalkingNumber, describedly join described coupling frequency spectrum resource and comprise to described upper ripple signal component:
The crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group crosstalks quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency deviation resource in described upper ripple signal groupRipple signal on other.
Described upper ripple signal comprises two upper ripple signals that transmission path is identical, by described upper ripple signal groupIn the cost of being crosstalked affect a minimum upper ripple signal as the low susceptibility signal of crosstalking, described by instituteState the crosstalk zone of coupling frequency spectrum resource and distribute to the low susceptibility letter of crosstalking in described upper ripple signal groupNumber, the non-crosstalk zone of described coupling frequency deviation resource is distributed on other in described upper ripple signal groupRipple signal comprises:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
Described upper ripple signal group comprises the upper ripple signal that more than two transmission path is identical, by described upper rippleThe cost of being crosstalked in signal group affects two minimum upper ripple signals as the low susceptibility signal of crosstalking, instituteState the crosstalk zone of described coupling frequency spectrum resource is distributed to the low sensitivity of crosstalking in described upper ripple signal groupDegree signal, distributes to its in described upper ripple signal group by the non-crosstalk zone of described coupling frequency deviation resourceHe comprises by upper ripple signal:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
In the middle of being arranged in, the described upper ripple signal by other comprises:
Other upper ripple signal is arranged to both sides from centre successively according to order of modulation order from high to lowRow.
Described dwindling and the described filtering bandwidth bag that mates at least one through connect signal that frequency spectrum resource is adjacentDraw together:
Dwindle with described and mate at least one through connect signal that frequency spectrum resource is adjacent by wavelength-selective switchesFiltering bandwidth.
Describedly also comprise before joining transmission path to upper ripple signal component:
Each upper ripple signal is divided into a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
Embodiment eight
Figure 20 is crosstalk device embodiment seven structural representations of cost of a kind of reduction of the present invention, described dressPut and comprise first memory 2001 and first processor 2002, described first memory 2001 is for depositingStorage instruction, described first processor 2002 is for transferring instruction, and described instruction comprises:
Join transmission path to upper ripple signal component, described upper ripple signal group comprises at least two transmission pathsIdentical upper ripple signal, affects minimum upper ripple signal by the cost of being crosstalked in described upper ripple signal group and doesFor the low susceptibility signal of crosstalking;
On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and;
The crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group crosstalks quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency spectrum resource in described upper ripple signal groupRipple signal on other.
Described upper ripple signal comprises two upper ripple signals that transmission path is identical, by described upper ripple signal groupIn the cost of being crosstalked affect a minimum upper ripple signal as the low susceptibility signal of crosstalking, described by instituteState the crosstalk zone of coupling frequency spectrum resource and distribute to the low susceptibility letter of crosstalking in described upper ripple signal groupNumber, the non-crosstalk zone of described coupling frequency spectrum resource is distributed on other in described upper ripple signal groupRipple signal comprises:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
Described upper ripple signal group comprises the upper ripple signal that more than two transmission path is identical, by described upper rippleThe cost of being crosstalked in signal group affects two minimum upper ripple signals as the low susceptibility signal of crosstalking, instituteState the crosstalk zone of described coupling frequency spectrum resource is distributed to the low sensitivity of crosstalking in described upper ripple signal groupDegree signal, distributes to its in described upper ripple signal group by the non-crosstalk zone of described coupling frequency deviation resourceHe comprises by upper ripple signal:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal in described upper ripple signal group is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
Optionally, describedly join to upper ripple signal component also to carry out instruction before transmission path:
Each upper ripple signal is divided into a upper ripple signal group; Or, by upper ripple identical transmission pathSignal is divided into a upper ripple signal group.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the present inventionThe spirit and scope of the present invention. Like this, if these amendments of the present invention and modification belong to the present invention's powerProfit require and the scope of equivalent technologies within, the present invention is also intended to comprise these and changes and modification existsIn.

Claims (22)

1. the reduction method for cost of crosstalking, is characterized in that, described method comprises:
Join transmission path to upper ripple signal component, each upper ripple signal group comprises at least one transmission pathIdentical upper ripple signal;
On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and;
Dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacent;
Join described coupling frequency spectrum resource to described upper ripple signal component, make described upper ripple signal group and contractingThe through connect signal next-door neighbour of little filtering bandwidth.
2. method according to claim 1, is characterized in that, described on described transmission pathChoosing a coupling frequency spectrum resource comprises:
On described transmission path, search with described on the identical through connect signal of ripple signal group transmission path;
Choose adjacent with a described through connect signal frequency spectrum resource that mates;
, dwindle and the described filtering bandwidth that mates at least one through connect signal that frequency spectrum resource is adjacentComprise:
Dwindle the filtering bandwidth of the through connect signal identical with described upper ripple signal group transmission path.
3. method according to claim 1, is characterized in that, described upper ripple signal group comprises twoThe upper ripple signal that individual and more than two transmission path is identical, will be crosstalked generation in described upper ripple signal groupThe upper ripple signal of valency impact minimum is as the low susceptibility signal of crosstalking, described to described upper ripple signal componentJoining described coupling frequency spectrum resource comprises:
The crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group crosstalks quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency deviation resource in described upper ripple signal groupRipple signal on other.
4. method according to claim 3, is characterized in that, described upper ripple signal comprises twoThe upper ripple signal that transmission path is identical, affects one of minimum by the cost of being crosstalked in described upper ripple signal groupIndividual upper ripple signal is as the low susceptibility signal of crosstalking, described by the crosstalk zone of described coupling frequency spectrum resourceDistribute to the low susceptibility signal of crosstalking in described upper ripple signal group, non-by described coupling frequency deviation resourceCrosstalk zone is distributed to ripple signal on other in described upper ripple signal group and is comprised:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
5. method according to claim 3, is characterized in that, described upper ripple signal group comprises twoThe upper ripple signal that individual above transmission path is identical, affects the cost of being crosstalked in described upper ripple signal groupTwo little upper ripple signals are as the low susceptibility signal of crosstalking, described by the string of described coupling frequency spectrum resourceDisturb region allocation to the low susceptibility signal of crosstalking in described upper ripple signal group, by described coupling frequency deviation moneyThe non-crosstalk zone in source is distributed to ripple signal on other in described upper ripple signal group and is comprised:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
6. method according to claim 5, is characterized in that, described by other upper ripple signalIn the middle of being arranged in, comprise:
Other upper ripple signal is arranged to both sides from centre successively according to order of modulation order from high to lowRow.
7. according to the method described in claim 1-6 any one, it is characterized in that, described in dwindle withThe filtering bandwidth of at least one through connect signal that described coupling frequency spectrum resource is adjacent comprises:
Dwindle with described and mate at least one through connect signal that frequency spectrum resource is adjacent by wavelength-selective switchesFiltering bandwidth.
8. according to the method described in claim 1-6 any one, it is characterized in that, described to upper rippleSignal component also comprises before joining transmission path:
Each upper ripple signal is divided into a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
9. the reduction method for cost of crosstalking, is characterized in that, described method comprises:
Join transmission path to upper ripple signal component, described upper ripple signal group comprises at least two transmission pathsIdentical upper ripple signal, affects minimum upper ripple signal by the cost of being crosstalked in described upper ripple signal group and doesFor the low susceptibility signal of crosstalking;
On described transmission path, choose a coupling frequency spectrum resource, described coupling frequency spectrum resource is continuousAnd spectrum width be greater than all upper ripple signals in described upper ripple signal group spectrum width and;
The crosstalk zone of described coupling frequency spectrum resource is distributed to low in described upper ripple signal group crosstalks quickSensitivity signal, distributes to the non-crosstalk zone of described coupling frequency spectrum resource in described upper ripple signal groupRipple signal on other.
10. method according to claim 9, is characterized in that, described upper ripple signal comprises twoThe upper ripple signal that individual transmission path is identical, affects the cost of being crosstalked in described upper ripple signal group minimumA upper ripple signal is as the low susceptibility signal of crosstalking, described by the crosstalk zone of described coupling frequency spectrum resourceThe low susceptibility signal of crosstalking in described upper ripple signal group is distributed in territory, by described coupling frequency spectrum resourceNon-crosstalk zone is distributed to ripple signal on other in described upper ripple signal group and is comprised:
To in described coupling frequency spectrum resource, give the described low sensitivity of crosstalking with through connect signal next-door neighbour's region allocationDegree signal, makes described low crosstalk susceptibility signal and described through connect signal next-door neighbour;
To in described coupling frequency spectrum resource, give another with the described low susceptibility signal next-door neighbour's of crosstalking region allocationA upper ripple signal, is close to described another upper ripple signal and the described low susceptibility signal of crosstalking.
11. methods according to claim 9, is characterized in that, described upper ripple signal group comprisesThe upper ripple signal that more than two transmission path is identical, affects the cost of being crosstalked in described upper ripple signal groupTwo minimum upper ripple signals are as the low susceptibility signal of crosstalking, described by described coupling frequency spectrum resourceCrosstalk zone is distributed to the low susceptibility signal of crosstalking in described upper ripple signal group, by described coupling frequency deviationThe non-crosstalk zone of resource is distributed to ripple signal on other in described upper ripple signal group and is comprised:
To the upper ripple signal sequence in described upper ripple signal group, two low susceptibility signals of crosstalking are arrangedAt two ends, in the middle of other upper ripple signal in described upper ripple signal group is arranged in;
Distribute to the upper ripple after arrangement by mating frequency spectrum resource described in any one adjacent with through connect signalSignal group, makes upper ripple signal group and described through connect signal next-door neighbour after described arrangement.
12. according to the method described in claim 9-11 any one, it is characterized in that, described to upperRipple signal component also comprises before joining transmission path:
Each upper ripple signal is divided into a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
The crosstalk device of cost of 13. 1 kinds of reductions, is characterized in that, described device comprises:
The first path distribution module, for joining transmission path, each upper ripple signal to upper ripple signal componentGroup comprises the upper ripple signal that at least one transmission path is identical;
First resource is chosen module, for choose a coupling frequency spectrum resource on described transmission path,Described coupling frequency spectrum resource is continuous and spectrum width is greater than all upper ripples in described upper ripple signal groupThe spectrum width of signal and;
Bandwidth is dwindled module, for dwindling and the described straight-through letter of adjacent at least one of frequency spectrum resource that matesNumber filtering bandwidth;
The first spectrum allocation module, for joining described coupling frequency spectrum resource to described upper ripple signal component,Make described upper ripple signal group and the through connect signal next-door neighbour who dwindles filtering bandwidth.
14. devices according to claim 13, is characterized in that, described first resource is chosen mouldPiece comprises:
Search unit, on described transmission path, search with described on ripple signal group transmission path phaseSame through connect signal;
Choose unit, for choosing adjacent with a through connect signal frequency spectrum resource that mates;
Described bandwidth is dwindled module and is comprised:
Dwindle unit, for dwindling the filter of the through connect signal identical with described upper ripple signal group transmission pathWavestrip is wide.
15. devices according to claim 13, is characterized in that, described upper ripple signal group comprisesThe upper ripple signal that more than two and two transmission path is identical, will be crosstalked in described upper ripple signal groupCost affects minimum upper ripple signal as the low susceptibility signal of crosstalking, described the first spectrum allocation moduleComprise:
The first allocation units, for distributing to the crosstalk zone of described coupling frequency spectrum resource in described upper rippleThe low susceptibility signal of crosstalking in signal group, distributes to the non-crosstalk zone of described coupling frequency deviation resourceRipple signal on other in described upper ripple signal group.
16. devices according to claim 15, is characterized in that, described upper ripple signal comprises twoThe upper ripple signal that individual transmission path is identical, affects the cost of being crosstalked in described upper ripple signal group minimumA upper ripple signal is as the low susceptibility signal of crosstalking, and described the first allocation units comprise:
First distributes subelement, for the region with through connect signal next-door neighbour by described coupling frequency spectrum resourceDistribute to the described low susceptibility signal of crosstalking, make described low susceptibility signal and the described straight-through letter of crosstalkingNumber next-door neighbour;
Second distributes subelement, for described coupling frequency spectrum resource and the described low susceptibility of crosstalking are believedNumber next-door neighbour's region allocation is to ripple signal another on, ripple signal and described low on another described in makingThe susceptibility signal of crosstalking next-door neighbour.
17. devices according to claim 15, is characterized in that, described upper ripple signal group comprisesThe upper ripple signal that more than two transmission path is identical, affects the cost of being crosstalked in described upper ripple signal groupTwo minimum upper ripple signals are as the low susceptibility signal of crosstalking, and described the first allocation units comprise:
Sequence subelement, for the upper ripple signal sequence to described upper ripple signal group, by two low stringsDisturb susceptibility signal and be arranged in two ends, in the middle of other upper ripple signal is arranged in;
The 3rd distributes subelement, for mating frequency spectrum money described in any one adjacent with through connect signalThe upper ripple signal group after arrangement is distributed in source, makes upper ripple signal group and described leading directly to after described arrangementSignal next-door neighbour.
18. according to the device described in claim 13-17 any one, it is characterized in that described dressAlso put and comprise:
The first grouping module, for being divided into each upper ripple signal a upper ripple signal group;
Or,
For upper ripple signal identical transmission path being divided into a upper ripple signal group.
The crosstalk device of cost of 19. 1 kinds of reductions, is characterized in that, described device comprises:
The second path allocation module, for joining transmission path, described upper ripple signal to upper ripple signal componentGroup comprises at least two upper ripple signals that transmission path is identical, will in described upper ripple signal group, be crosstalked generationThe upper ripple signal of valency impact minimum is as the low susceptibility signal of crosstalking;
Secondary resource is chosen module, for choose a coupling frequency spectrum resource on described transmission path,Described coupling frequency spectrum resource is continuous and spectrum width is greater than all upper ripples in described upper ripple signal groupThe spectrum width of signal and;
The second spectrum allocation module, described in distributing to the crosstalk zone of described coupling frequency spectrum resourceThe low susceptibility signal of crosstalking in upper ripple signal group, divides the non-crosstalk zone of described coupling frequency spectrum resourceRipple signal on other described in dispensing in upper ripple signal group.
20. devices according to claim 19, is characterized in that, described upper ripple signal comprises twoThe upper ripple signal that individual transmission path is identical, affects the cost of being crosstalked in described upper ripple signal group minimumA upper ripple signal is as the low susceptibility signal of crosstalking, and described the second spectrum allocation module comprises:
The second allocation units, for dividing described coupling frequency spectrum resource and through connect signal next-door neighbour's regionThe low susceptibility signal of crosstalking described in dispensing, makes described low susceptibility signal and the described through connect signal of crosstalkingNext-door neighbour;
The 3rd allocation units, for by described coupling frequency spectrum resource and the described low susceptibility signal of crosstalkingNext-door neighbour's region allocation is to ripple signal another on, ripple signal and described low string on another described in makingDisturb susceptibility signal next-door neighbour.
21. devices according to claim 19, is characterized in that, described upper ripple signal group comprisesThe upper ripple signal that more than two transmission path is identical, affects the cost of being crosstalked in described upper ripple signal groupTwo minimum upper ripple signals are as the low susceptibility signal of crosstalking, and described the second spectrum allocation module comprises:
Sequencing unit, for the upper ripple signal sequence to described upper ripple signal group, by two low crosstalkingSusceptibility signal is arranged in two ends, in the middle of other upper ripple signal in described upper ripple signal group is arranged in;
The 4th allocation units, for mating frequency spectrum resource by described in any one adjacent with through connect signalDistribute to the upper ripple signal group after arrangement, make upper ripple signal group and described straight-through letter after described arrangementNumber next-door neighbour.
22. according to the device described in claim 19-21 any one, it is characterized in that described dressAlso put and comprise:
The second grouping module, for being divided into each upper ripple signal a upper ripple signal group;
Or,
Upper ripple signal identical transmission path is divided into a upper ripple signal group.
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