WO2015006983A1 - 一种减低串扰代价的方法和装置 - Google Patents

一种减低串扰代价的方法和装置 Download PDF

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Publication number
WO2015006983A1
WO2015006983A1 PCT/CN2013/079713 CN2013079713W WO2015006983A1 WO 2015006983 A1 WO2015006983 A1 WO 2015006983A1 CN 2013079713 W CN2013079713 W CN 2013079713W WO 2015006983 A1 WO2015006983 A1 WO 2015006983A1
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Prior art keywords
signal
crosstalk
signals
signal group
upstream
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PCT/CN2013/079713
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English (en)
French (fr)
Inventor
宗良佳
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380001090.XA priority Critical patent/CN103650380B/zh
Priority to PCT/CN2013/079713 priority patent/WO2015006983A1/zh
Publication of WO2015006983A1 publication Critical patent/WO2015006983A1/zh

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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

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a method and apparatus for reducing crosstalk cost. Background technique
  • the topology of the point-to-point line communication subnet in the traditional optical communication system can not meet the needs of communication development, and the topology of the entire network gradually develops into the wireless network mesh (Mesh).
  • the reconfigurable optical add/drop multiplexer can be remotely configured (Reconfigurable Optical).
  • the parameters of the Add-Drop Multiplexer (ROADM) are optically scheduled, and can dynamically uplink and lower service wavelengths.
  • the uplink signal of the upper path is the same as the wavelength of the center wavelength of the lower path, the upper wave signal will occupy the same spectral resource as the center wavelength, and therefore, the residual spectrum of the center wavelength becomes the crosstalk of the upper wave signal, that is, the crosstalk cost is generated.
  • the crosstalk will be transmitted along with the uplink signal. Since the crosstalk component has the same frequency spectrum as the upper wave signal component, once it enters the upper wave signal, it will be difficult to eliminate, thereby affecting the transmission performance of the service signal.
  • Orthogonal Frequency Division Multiplexing Orthogonal Frequency Division Multiplexing
  • the influence of the Frequency Division Multiplexing (OFDM) signal is shown in Figure 2:
  • the input signal is passed through the ROADM downlink down-wave signal, assuming that the downstream downlink signal is 4 subcarrier signals, due to the ROADM
  • the wavelength selection switch does not provide a perfect filter curve. Therefore, some of the original spectral edge positions of the lower wave signal remain.
  • the spectral component which is the crosstalk of the upper wave signal.
  • a certain protection bandwidth is reserved between the upper wave signal and the through signal, and the number of subcarriers of the uplink signal of the uplink is reduced, and the residual spectral component is reduced.
  • Crosstalk of the wave signal As shown in FIG. 3, the uplink signal of the uplink is three subcarriers of the same wavelength.
  • the present invention provides a method and apparatus for reducing the cost of crosstalk, which can reduce the impact of crosstalk cost without the need to reserve a guard bandwidth.
  • a first aspect of the embodiments of the present invention provides a method for reducing crosstalk cost, the method comprising: allocating a transmission path to an upper wave signal group, each uplink wave signal group including at least one uplink signal having the same transmission path;
  • the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the upper wave signal group; and narrowing is adjacent to the matched spectrum resource And a filtering bandwidth of the at least one through signal; assigning the matched spectral resource to the upper wave signal group such that the upper wave signal group is in close proximity to a through signal of a reduced filtering bandwidth.
  • the selecting a matching spectrum resource on the transmission path includes:
  • reducing the filtering bandwidth of the at least one through signal adjacent to the matched spectrum resource includes: The filtering bandwidth of the same through signal as the upper wave signal group transmission path is reduced.
  • the uplink signal group includes two uplink signals with the same transmission path and two or more transmission paths, which minimizes the crosstalk cost in the uplink signal group.
  • the uplink signal is used as the low crosstalk sensitivity signal, and the allocating the matching frequency resource to the upper wave signal group includes:
  • the uplink signal includes two uplink signals having the same transmission path, and the uplink signal group is An uplink signal that is least affected by the crosstalk cost is used as the low crosstalk sensitivity signal, and the crosstalk region of the matched spectral resource is allocated to the low crosstalk sensitivity signal in the upper wave signal group, and the matching frequency offset is
  • the assignment of the non-crosstalk region of the resource to other uplink signals in the upper wave signal group includes:
  • An area of the matched spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another upstream signal such that the other upper wave signal is in close proximity to the low crosstalk sensitivity signal.
  • the uplink wave signal group includes two uplink signals having the same transmission path, and the uplink signal is The two uplink signals in the group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal, and the crosstalk region of the matched spectrum resource is allocated to the low crosstalk sensitivity signal in the upper wave signal group, Assigning the non-crosstalk region of the matched frequency offset resource to other uplink signals in the upper wave signal group includes:
  • the arranging the other upper wave signals in the middle includes:
  • the other upper wave signals are sequentially arranged from the middle to the two sides in the order of the modulation order from high to low.
  • the filtering bandwidth of the at least one through signal that is adjacent to the matched spectrum resource is reduced.
  • a filter bandwidth of at least one through signal adjacent to the matched spectral resource is reduced by a wavelength selective switch.
  • the method before the allocating the transmission path to the upper wave signal group, the method further includes:
  • the upper wave signal with the same transmission path is divided into an upper wave signal group.
  • a second aspect of the embodiments of the present invention provides a method for reducing crosstalk cost, the method comprising: allocating a transmission path to an upper wave signal group, where the upper wave signal group includes at least two uplink signals having the same transmission path, The upper wave signal having the least influence on the crosstalk cost in the wave signal group is described as the low crosstalk sensitivity signal;
  • the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group; and the crosstalk region of the matched spectrum resource is Assigning to the low crosstalk sensitivity signal in the upper wave signal group, assigning a non-crosstalk region of the matched spectral resource to other uplink signal in the upper wave signal group.
  • the uplink signal includes two uplink signals having the same transmission path, and an uplink signal having the least influence on the crosstalk cost of the uplink signal group.
  • the crosstalk area of the matched spectrum resource is allocated to the low crosstalk sensitivity signal in the uplink signal group, and the non-crosstalk area of the matched spectrum resource is allocated to the upper wave
  • Other upstream signals in the signal group include:
  • the uplink signal group includes two uplink signals having the same transmission path, and two of the uplink signal groups having the least influence on crosstalk cost
  • the uplink signal is used as the low crosstalk sensitivity signal, and the crosstalk region of the matched spectrum resource is allocated to the low crosstalk sensitivity signal in the uplink signal group, and the non-crosstalk region of the matched frequency offset resource is allocated to
  • Other uplink signals in the upper wave signal group include:
  • the method before the allocating the transmission path to the uplink signal group, the method further includes:
  • the upper wave signal with the same transmission path is divided into an upper wave signal group.
  • a third aspect of the embodiments of the present invention provides an apparatus for reducing crosstalk cost, the apparatus comprising: a first path allocation module, configured to allocate a transmission path to an uplink signal group, where each uplink signal group includes at least one transmission path is the same Upper wave signal
  • a first resource selection module configured to select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group;
  • a bandwidth reduction module configured to reduce a filtering bandwidth of at least one direct communication number adjacent to the matched spectrum resource
  • a first spectrum allocation module configured to allocate the matched spectrum resource to the uplink signal group, such that the uplink signal group is in close proximity to a through signal of a reduced filtering bandwidth.
  • the first resource selection module includes:
  • a searching unit configured to search, on the transmission path, with the uplink signal group transmission path Same straight through signal;
  • a selecting unit configured to select a matching spectrum resource adjacent to the through signal
  • the bandwidth reduction module includes:
  • a reduction unit for reducing a filter bandwidth of the same through signal as the uplink signal group transmission path.
  • the uplink wave signal group includes two uplink signals of the same transmission path and two or more transmission paths, and the interference of the uplink wave signal group is minimized.
  • the uplink signal is a low crosstalk sensitivity signal
  • the first spectrum allocation module includes:
  • a first allocation unit configured to allocate a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink signal group, and allocate a non-crosstalk region of the matched frequency offset resource to the uplink signal Other upper wave signals in the group.
  • the uplink signal includes two uplink signals having the same transmission path, and the uplink signal group is included.
  • An uplink signal that is least affected by the crosstalk cost is used as the low crosstalk sensitivity signal, and the first allocation unit includes:
  • a first allocation subunit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the through signal to the low crosstalk sensitivity signal, so that the low crosstalk sensitivity signal is in close proximity to the direct communication signal;
  • a second allocation subunit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the low crosstalk sensitivity signal to another uplink signal, such that the another uplink signal and the low crosstalk sensitivity signal Immediately.
  • the uplink wave signal group includes two uplink signals having the same transmission path, and the uplink signal is The two uplink signals in the group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal, and the first allocation unit includes:
  • a sorting subunit configured to sort the upper wave signals in the upper wave signal group, arrange two low crosstalk sensitivity signals at both ends, and arrange other upper wave signals in the middle;
  • a third allocation subunit configured to: match any one of the matching spectrum resources adjacent to the through signal
  • the source is assigned to the arranged upper wave signal group such that the aligned upper wave signal group is in close proximity to the through signal.
  • the apparatus further includes:
  • a first grouping module configured to divide each of the uplink signals into an upper wave signal group
  • a fourth aspect of the embodiments of the present invention provides an apparatus for reducing a crosstalk cost, where the apparatus includes: a second path allocation module, configured to allocate a transmission path to an upper wave signal group, where the uplink wave signal group includes at least two transmission paths The same uplink signal, the upper wave signal in the upper wave signal group having the least influence on the crosstalk cost is used as the low crosstalk sensitivity signal;
  • a second resource selection module configured to select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group;
  • a second spectrum allocation module configured to allocate a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink signal group, and allocate a non-crosstalk region of the matched spectrum resource to the uplink signal Other upper wave signals in the group.
  • the uplink signal includes two uplink signals having the same transmission path, and an uplink signal having the least influence on the crosstalk cost of the uplink signal group.
  • the second spectrum allocation module includes: a second allocation unit, configured to allocate, in the matched spectrum resource, an area immediately adjacent to the through signal to the low crosstalk sensitivity signal, so that the low a crosstalk sensitivity signal in close proximity to the through signal;
  • a third allocation unit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the low crosstalk sensitivity signal to another uplink signal, such that the another uplink signal and the low crosstalk sensitivity signal are in close proximity .
  • the uplink signal group includes two uplink signals having the same transmission path, and two of the uplink signal groups having the least influence on crosstalk cost
  • the upper wave signal is used as a low crosstalk sensitivity signal
  • the second spectrum allocation module package Includes:
  • a sorting unit configured to sort the upper wave signals in the upper wave signal group, arrange two low crosstalk sensitivity signals at both ends, and arrange other upper wave signals in the upper wave signal group in the middle;
  • a fourth allocation unit configured to allocate any one of the matched spectrum resources adjacent to the through signal to the arranged upper wave signal group, such that the aligned upper wave signal group is adjacent to the through signal.
  • the device further includes:
  • a second grouping module configured to divide each uplink signal into an upper wave signal group
  • the upper wave signal with the same transmission path is divided into an upper wave signal group.
  • the present invention has the following beneficial effects:
  • An embodiment of the present invention provides a method for reducing crosstalk cost, assigning a transmission path to an upper wave signal group, selecting a matching spectrum resource on the transmission path, and reducing at least one through signal adjacent to the matched spectrum resource. Filtering bandwidth; assigning the matched spectrum resource to the upper wave signal group, because when narrowing the filtering bandwidth of the through signal, the spectral component remaining at the edge of the through signal is reduced correspondingly, thereby reducing crosstalk
  • the method of the present invention also provides a method for reducing the crosstalk cost, and the transmission path is allocated to the upper wave signal group.
  • the wave signal group includes at least two uplink signals having the same transmission path, and the upper wave signal in the upper wave signal group having the least influence on the crosstalk cost is used as the low crosstalk sensitivity signal; and a matching spectrum resource is selected on the transmission path.
  • the matched spectrum resource is continuous and the spectrum width is greater than the uplink signal a sum of spectral widths of all uplink signals in the group; assigning a crosstalk region of the matched spectral resource to a low crosstalk sensitivity signal in the upper wave signal group, and assigning a non-crosstalk region of the matched spectral resource to the The other upper wave signals in the wave signal group are described.
  • the low crosstalk sensitivity signal is less affected by the residual spectral components, the low crosstalk sensitivity signal is distributed in the crosstalk region with residual spectral components, which will be lower than the low crosstalk sensitivity.
  • the other high crosstalk sensitivity signals whose signals are greatly affected by the crosstalk cost are allocated in the non-crosstalk region without residual spectral components, and there is no need to reserve a certain protection bandwidth.
  • the upper wave signal does not need to be higher order than the lower wave signal.
  • the modulation mode effectively reduces the crosstalk cost of the upper wave signal group and does not waste the matching spectrum resource.
  • FIG. 1 is a schematic diagram showing the causes of crosstalk cost in the prior art
  • FIG. 2 is a schematic diagram of a method for reducing crosstalk cost in the prior art
  • Figure 3 is a schematic diagram showing simulation results of optical signal-to-noise ratio (SNR) cost of uplink signals with different modulation formats and different bit rates due to crosstalk cost;
  • SNR optical signal-to-noise ratio
  • FIG. 4 is a schematic flowchart of Embodiment 1 of a method for reducing crosstalk cost according to the present invention
  • FIG. 5 is a schematic diagram of a crosstalk signal after a continuous spectrum signal enters a ROADM system according to the present invention
  • FIG. 6 is a schematic diagram of idle spectrum resources after a continuous spectrum signal enters a downlink wave of a ROADM system according to the present invention
  • FIG. 7 is a schematic diagram of narrowing a filter bandwidth of at least one through signal adjacent to the matched spectrum resource according to the present invention.
  • FIG. 8( a ) is a schematic diagram of the crosstalk signal after reducing the filtering bandwidth 701 of the adjacent side of the pass-through signal 2 and the idle spectrum resource 2 according to the present invention
  • FIG. 8(b) is a schematic diagram of the crosstalk signal after reducing the filtering bandwidth 702 of the adjacent side of the pass-through signal 3 and the idle spectrum resource 2 according to the present invention
  • Figure 8 (c) shows the present invention simultaneously reducing the idle spectrum resource 2 and the through signal 2 and the through signal
  • 9( a ) is a schematic diagram of the first uplink signal group and the straight-through signal 2 of the reduced filtering bandwidth of the present invention
  • 9(b) is a schematic diagram of the first uplink signal group and the straight-through signal 3 of the reduced filtering bandwidth of the present invention
  • FIG. 10 is a schematic flowchart of Embodiment 2 of a method for reducing crosstalk cost according to the present invention
  • FIG. 11 (a) is a schematic diagram of filtering bandwidth of a straight-through signal that is the same as the uplink signal group transmission path according to the present invention
  • 11(b) is a schematic diagram of a crosstalk signal after reducing a filtering bandwidth of a straight-through signal identical to the uplink signal group transmission path according to the present invention
  • FIG. 12(a) is a schematic diagram of assigning a matched spectrum resource to a fourth uplink signal group according to the present invention
  • FIG. 12(b) is a schematic diagram of assigning a matched spectrum resource to a third uplink signal group according to the present invention
  • Invented a flowchart of Embodiment 3 of a method for reducing crosstalk cost
  • FIG. 14 is a schematic diagram of a downlink spectrum resource after a continuous spectrum signal according to the present invention
  • FIG. 15 (a) is a schematic diagram of assigning a region of the matched spectrum resource 9 adjacent to the through signal 11 to a fifth uplink signal group according to the present invention
  • 15(b) is a schematic diagram of the present invention for assigning a region of the matched spectrum resource 9 adjacent to the through signal 12 to the fifth upper wave signal group;
  • Figure 15 (c) is a schematic diagram of the present invention for assigning matched spectrum resources 8 to a third upper wave signal group;
  • FIG. 16 is a schematic structural diagram of Embodiment 4 of a device for reducing crosstalk cost according to the present invention
  • FIG. 17 is a schematic structural diagram of Embodiment 5 of a device for reducing crosstalk cost according to the present invention
  • FIG. 18 is a schematic diagram of an apparatus for reducing crosstalk cost according to the present invention.
  • FIG. 19 is a schematic structural diagram of Embodiment 7 of a device for reducing crosstalk cost according to the present invention
  • FIG. 20 is a schematic structural diagram of Embodiment 7 of a device for reducing crosstalk cost according to the present invention.
  • the present invention provides a method and an apparatus for reducing the crosstalk cost, and a preferred embodiment of the present invention is described with reference to the accompanying drawings.
  • the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
  • the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
  • Figure 3 is a simulation result of the optical signal-to-noise ratio (SNR) cost of the uplink signal with different modulation formats and different bit rates due to crosstalk cost.
  • SNR optical signal-to-noise ratio
  • 10G bit rate non return to zero (NRZ) 40G bit rate zero-differential quadrature phase shift keying modulation format ( return to zero differential quadrature reference phase shift) Keying, RZ-DQPSK) and the 80G bit rate polarization multiplexing quadrature phase shift keying (PDM-QPSK)
  • the sensitivity of the crosstalk cost is basically the same, as shown in the figure.
  • the three kinds of uplink signals generate 0.5 dB optical signal noise ratio (OSNR), and the crosstalk size is -20 dB.
  • OSNR optical signal noise ratio
  • the WSS crosstalk nominal value is between -30dB and -35dB. Therefore, for the existing 10G, 40G and 100G bit rate modulation formats, the crosstalk cost caused by the residual spectral components of the ROADM system after the downstream signal is not very obvious.
  • the single-channel line in the optical network will have a higher bit rate of 400G or even 1T.
  • high-order modulation methods such as 16 quadrature amplitude modulation (QAM), 32QAM, etc.
  • OFDM multi-carrier orthogonal frequency division multiplexing
  • the uplink signals of the 10G, 40G, and 100G bit rate modulation formats are still less affected by the crosstalk penalty.
  • the corresponding crosstalk value is small when generating the same optical signal-to-noise ratio penalty.
  • the crosstalk size corresponding to the 0.5 dB OSNR penalty for the uplink signal of the 16QAM modulation format is -27 dB.
  • the crosstalk cost of the residual spectral component for the edge carrier is also very large.
  • the crosstalk cost brought by ROADM is not negligible.
  • Low crosstalk sensitivity signals and high crosstalk sensitivity signals are a relative concept and are not an absolute concept. Not all high order modulated uplink signals are high crosstalk sensitivity signals.
  • a plurality of uplink signals included in an uplink signal group are affected by the crosstalk cost, and the signal is a low crosstalk sensitivity signal, and the signal greatly affected by the crosstalk cost is a high crosstalk sensitivity signal.
  • the upper wave signal of the 16QAM modulation format is a high crosstalk sensitivity signal
  • the low crosstalk sensitivity signal may be an upper wave signal of the 8QAM modulation format.
  • the crosstalk is relatively expensive, as a high crosstalk sensitivity signal.
  • one or two upper wave signals that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal, and the other upper wave signals are used as the high crosstalk sensitivity signal.
  • the low crosstalk sensitivity signal is exemplified by the low order modulation signal; and the high crosstalk sensitivity signal is exemplified by the high order modulation signal or the multi-carrier modulation signal.
  • Embodiment 1 the low crosstalk sensitivity signal is exemplified by the low order modulation signal; and the high crosstalk sensitivity signal is exemplified by the high order modulation signal or the multi-carrier modulation signal.
  • FIG. 4 is a schematic flowchart of Embodiment 1 of a method for reducing crosstalk cost according to the present invention, where the method includes:
  • Step 401 Allocating a transmission path to the upper wave signal group, each of the uplink wave signal groups including at least one uplink signal having the same transmission path.
  • the transmission path is assigned to the upper wave signal group, that is, each uplink signal of the upper wave signal group is assigned the same routing information.
  • the spectrum signal When a set of continuous spectrum signals enters the ROADM system, the spectrum signal includes a through signal and a down wave signal. After the spectrum signal is filtered by WSS, the spectral component remains at the edge of the through signal adjacent to the lower wave signal, as shown in FIG. 5. Shown.
  • each of the uplink signals can be independently used as an uplink signal group, that is, there is only one uplink signal in each uplink signal group; the same uplink wave can also be transmitted.
  • the signal acts as an upper wave signal group, and each of the upper wave signal groups can be composed of one or more uplink signals having the same transmission path. If there are more uplink signals with the same transmission path, the uplink signal with the same transmission path can be divided into several uplink signals according to actual needs. Group. It is also possible to set a plurality of upper wave signals according to actual needs, and set specific limiting conditions, and the number of upper wave signals in each upper wave signal group can also be set according to actual conditions.
  • upper wave signal 1 100G PDM-QPSK
  • upper wave signal 2 dual carrier 400G PDM-16QAM
  • upper wave signal 3 40G PDM-QPSK
  • upper wave signal 4 40G PDM-QPSK
  • upper wave signal 5 dual carrier 400G PDM-16QAM
  • the transmission paths of the upper wave signal 2 and the upper wave signal 3 are the same, and the transmission paths of the upper wave signal 4 and the upper wave signal 5 are the same.
  • each uplink signal can be regarded as an upper wave signal group, that is, there are five upper wave signal groups; the upper wave signal having the same transmission path can also be divided into an upper wave.
  • the signal group that is, there are two upper wave signal groups, wherein one of the upper wave signal groups includes an upper wave signal 1, an upper wave signal 2, and an upper wave signal 3, and the other upper wave signal group includes an upper wave signal 4 and an upper wave signal 5 .
  • the above specific example is only used to group multiple uplink signals, and is not limited to the above grouping manner. It is also possible to set a method for grouping a plurality of uplink signals according to actual conditions.
  • a path computation element is used to allocate a transmission path for the upper wave signal group.
  • the shortest transmission path is preferentially selected.
  • Step 402 Select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectrum widths of all uplink signals in the uplink signal group.
  • each downlink signal After selecting the transmission path, there are multiple downlink signals on the transmission path, and each downlink signal will get a free spectrum resource after the downlink, as shown in Figure 6, giving each uplink signal group multiple idle.
  • a matching spectrum resource is selected in the spectrum resource, and the selected idle spectrum resource is allocated to the uplink signal.
  • the matched spectral resource is a continuous spectrum resource, and the spectral width of the spectral resource is greater than a sum of spectral widths of all uplink signals in the upper wave signal group.
  • upper wave signal 1 100G PDM-QPSK
  • upper wave signal 2 dual carrier 400G PDM-16QAM
  • upper wave signal 3 40G PDM-QPSK
  • Wave signal 4 40G PDM-QPSK
  • upper wave signal 5 dual carrier 400G PDM-16QAM
  • a continuous spectrum resource having a spectral width greater than a spectral width of the upper wave signal 1 is allocated to the upper wave signal group in which the upper wave signal 1 is located as a matching spectral resource;
  • the upper wave signal group in which the upper wave signal 2 is located is assigned a continuous idle spectrum resource whose spectral width is larger than the spectral width of the upper wave signal 2 as a matching spectral resource, and the upper wave signal 3, the upper wave signal 4 and the upper wave signal are given.
  • the allocation of the matched spectrum resources is similar to that of the upper-wave signal group, and will not be described here.
  • the upper wave signal having the same transmission path is divided into an upper wave signal group
  • the upper wave signal 1, the upper wave signal 2 and the upper wave signal 3 are taken as the first upper wave signal group
  • the upper wave signal 4 and the upper wave signal 5 As the second upper wave signal group.
  • Assigning a continuous idle spectrum resource 2 to the first upper wave signal group, and the spectral width of the idle spectrum resource 2 is greater than the sum of the spectral widths of the three upper wave signals of the upper wave signal 1, the upper wave signal 2, and the upper wave signal 3.
  • the idle spectrum resource 2 is used as a matching spectrum resource.
  • the spectrum width of the idle spectrum resource 3 is greater than the sum of the spectral widths of the two upper wave signals of the upper wave signal 3 and the upper wave signal 4, and the idle spectrum resource 3 is As a matching spectrum resource.
  • the transmission path is re-allocated for the uplink signal group.
  • Step 403 Reduce a filtering bandwidth of at least one through signal adjacent to the matched spectrum resource.
  • the bandwidth of the at least one through signal adjacent to the matched spectrum resource is reduced by using the variable bandwidth WSS.
  • the ROADM's slice granularity is implemented. In general, the minimum variation granularity can be set to 12.5 GHz.
  • the selected matched spectrum resource is the idle spectrum resource 2 and the idle spectrum resource 3 that will be generated after the downlink signal is downlinked, and the filtering bandwidth of the adjacent side of the pass signal 2 and the idle spectrum resource 2 can be reduced.
  • FIG. 8 (a) In order to reduce the filtering bandwidth 701 of the adjacent side of the pass-through signal 2 and the idle spectrum resource 2, it can be seen that the residual spectral component at the edge of the straight-through signal 2 is reduced; FIG. 8(b) is only narrowing the through-signal 3 and the idle spectrum.
  • FIG. 8(c) is a filtering bandwidth 701 of the side of the adjacent side of the idle spectrum signal 2 and the idle spectrum resource 2
  • FIG. 8(c) is a filtering bandwidth 701 of the side of the adjacent side of the idle spectrum signal 2 and the idle spectrum resource 2
  • FIG. 8(c) is a filtering bandwidth 701 of the side of the adjacent side of the idle spectrum signal 2 and the idle spectrum resource 2
  • a schematic diagram of the filter bandwidth 702 on the side adjacent to the idle spectrum signal 2 and the idle spectrum resource 2 it can be seen that the spectral components remaining in the edge of the through signal 2 and the through signal 3 adjacent to the idle spectrum resource 2 are reduced.
  • the filtering bandwidth of the at least one of the through signal 3 and the through signal 4 adjacent to the idle spectrum resource 3 is similar to that of the above method, and will not be described herein.
  • the residual spectral component When the residual spectral component is reduced in the filtering bandwidth of the through signal, it is filtered out at the same time, thereby reducing the size of the residual spectral component and reducing the crosstalk penalty caused by the residual spectral component, without the need for a wave signal on the road. A part of the protection bandwidth is reserved to reduce the crosstalk cost.
  • the foregoing specific example is only used to illustrate the filtering bandwidth of the through-signal adjacent to the matched matching spectrum resource.
  • the filtering bandwidth of the at least one through-pass signal adjacent to other selected matching spectral resources is similar to the above example. Narration.
  • Step 404 Assign the matched spectrum resource to the upper wave signal group such that the upper wave signal group is in close proximity to a through signal of a reduced filtering bandwidth.
  • each of the first wave signal groups in the first upper wave signal group is immediately adjacent to each other after the uplink, so that the entire first upper wave signal group is in close proximity to the through signal of the reduced filtering bandwidth.
  • 9 ( a ) is the first upper wave signal group and the straight-through signal 2 of the reduced filtering bandwidth is immediately adjacent
  • 9 ( b ) is the first upper wave signal The group is in close proximity to the through signal 3 that reduces the filtering bandwidth.
  • the first The upper wave signal group can optionally have a straight-through signal in close proximity, similar to Figure 9 (a) or Figure 9 (b).
  • the second upper wave signal group on the road is similar to the first upper wave signal group on the road, and is not repeated here.
  • FIG. 10 is a schematic flowchart of Embodiment 2 of a method for reducing crosstalk cost according to the present invention.
  • a crosstalk region is allocated to a low crosstalk sensitivity signal in an uplink signal group, and non-crosstalk is generated.
  • the area is allocated to other uplink signals in the upper wave signal group, and the method includes: Step 1001: The upper wave signals having the same transmission path are divided into an upper wave signal group.
  • the upper wave signal with the same transmission path is divided into an upper wave signal group, and all the upper wave signals in the entire upper wave signal group can be transmitted by the same transmission path, thereby reducing the number of transmission paths occupied by the single uplink signal transmission. It is convenient for transmitting and receiving multiple uplink signals.
  • the upper wave signal 6 (100G PDM-QPSK), the upper wave signal 7 (dual carrier 400G PDM-16QAM), the upper wave signal 8 (40G PDM-QPSK), Wave signal 9 (40G PDM-QPSK), upper wave signal 10 (dual carrier 400G PDM-16QAM).
  • the upper wave signal 6, the upper wave signal 7 and the upper wave signal 8 have the same transmission path and are divided into a third upper wave signal group; the upper wave signal 9 and the upper wave signal 10 have the same transmission path, and are divided into a fourth upper wave signal group.
  • Step 1002 Assign a transmission path to the upper wave signal group, where the upper wave signal group includes at least one uplink signal having the same transmission path.
  • Step 1003 Search for the same through signal on the transmission path as the uplink signal group transmission path.
  • Step 1004 Select a matching spectrum resource adjacent to the through signal.
  • the matched spectral resources are continuous and the spectral width is greater than the sum of the spectral widths of all of the upper wave signals in the upper wave signal group.
  • the WSS Since the through signal has the same transmission path as the upper wave signal group, when the edge portion of the through signal close to the upper wave signal group is subsequently passed through the ROADM system, the WSS does not filter the through signal, the through signal and The upper wave signal in the upper wave signal group passes through as a whole, thereby reducing the filtering cost.
  • the through signal 6 is the same as the transmission path of the third upper wave signal group, and the adjacent free spectrum resource 5 of the through signal 6 is continuous and the spectrum width is larger than the third upper wave signal group.
  • the sum of the spectral widths of the upper wave signal 6, the upper wave signal 7 and the upper wave signal 8 selects the idle spectrum resource 5 as the matching spectral resource of the third upper wave signal group.
  • the pass signal 7 is the same as the transmission path of the fourth upper wave signal group, and the idle spectrum resource 6 adjacent to the through signal 7 is continuous and the spectrum width is larger than the upper wave signal 9 and the upper wave signal 10 in the fourth upper wave signal group.
  • the sum of the spectral widths is selected as the matching spectrum resource of the fourth upper wave signal group.
  • Step 1005 Reduce the filter bandwidth of the same through signal as the uplink signal group transmission path.
  • the filtering bandwidth of the straight-through signal is the same as that of the upper-wave signal group transmission path, only the side of the through-signal and the matching spectrum resource is reduced, and the other side may not perform the processing of reducing the filtering bandwidth.
  • the filtering bandwidth of the side 1101 immediately adjacent to the idle spectrum signal 5 and the filtering bandwidth of the side 1102 immediately adjacent to the idle spectrum resource 6 are reduced, and the filtering bandwidth is reduced.
  • Figure 11 (b) the filtering bandwidth of the side 1101 immediately adjacent to the idle spectrum signal 5 and the filtering bandwidth of the side 1102 immediately adjacent to the idle spectrum resource 6 are reduced, and the filtering bandwidth is reduced.
  • Step 1006 Allocating a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink wave signal group, and assigning a non-crosstalk region of the matched frequency offset resource to other ones in the uplink wave signal group Up wave signal.
  • the other uplink signals include other low crosstalk sensitivity signals, any one or more of a high crosstalk sensitivity signal and a multicarrier uplink signal that are more affected by the crosstalk cost of the low crosstalk sensitivity signal.
  • the upper wave signal group includes two uplink signals having the same transmission path and two or more transmission paths, and the uplink signal having the least influence on the crosstalk cost of the upper wave signal group is used as a low crosstalk sensitivity signal, and the matched spectrum is used.
  • the crosstalk region of the resource is allocated to the low crosstalk sensitivity signal in the upper wave signal group, and the non-crosstalk region of the matched frequency offset resource is allocated to other uplink signals in the upper wave signal group, and there are two specific Case:
  • the uplink signal when the uplink signal includes two uplink signals having the same transmission path, an uplink signal having the least influence on the crosstalk cost of the upper wave signal group is used as the low crosstalk sensitivity signal:
  • An area of the matched spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another upstream signal such that the other upper wave signal is in close proximity to the low crosstalk sensitivity signal.
  • Another uplink signal of the upper wave signal group may be any one of a low crosstalk sensitivity signal, a high crosstalk sensitivity signal that is greatly affected by the crosstalk cost of the low crosstalk sensitivity signal, or a multicarrier uplink wave signal.
  • An area of the matching spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another uplink signal. Since the crosstalk area with residual spectral components is small, it is generally a minimum variation granularity, i.e., 12.5 GHz.
  • a low crosstalk sensitivity signal can completely cover the crosstalk region with residual spectral components. Therefore, another uplink signal is in close proximity to the low crosstalk sensitivity signal, i.e., in a non-crosstalk region.
  • the matched spectrum resource is allocated to the fourth upper wave signal group, and the upper wave signal 9 is narrowed to the side of the filtering bandwidth immediately adjacent to the through signal 7 , and the dual carrier uplink wave signal 10 and the upper wave signal 9 Immediately.
  • the crosstalk region is assigned to the low crosstalk sensitivity signal 9
  • the non-crosstalk region is assigned to the high crosstalk sensitivity signal 10.
  • the second case when the upper wave signal group includes two upper wave signals having the same transmission path, the two upper wave signals in the upper wave signal group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal:
  • the low crosstalk sensitivity signal is less affected by the crosstalk penalty caused by the residual spectral components, but for high-order modulation or multi-carrier uplink signals, the crosstalk caused by the ROADM is costly and cannot be ignored. of. Sorting the upper wave signals in the upper wave signal group, the two low crosstalk sensitivity signals are respectively arranged at both ends, and the other upper wave signals are arranged in the middle, so that when the matched spectrum resources are allocated to the upper wave signal group Immediately adjacent to any of the through signals adjacent to the matched spectrum resource. The two low crosstalk sensitivity signals in the upper wave signal group serve as a barrier to protect other upper wave signals.
  • the matched spectrum resource is allocated to the third upper wave signal group, and the three upper wave signals in the third upper wave signal group are sorted, and the low order upper wave signal 6 and The upper wave signals 8 are arranged on both sides, and the high-order upper wave signals 7 are arranged in the middle, and the matched spectrum resources are allocated to the arranged third upper wave signal groups.
  • the low-order upper-wave signal 6 is located on the side of the narrow-pass signal 6 narrowing the filtering bandwidth, that is, the cross-talk region
  • the high-order upper-wave signal 7 is located in the non-crosstalk region
  • the low-order upper-wave signal 8 is in the immediate vicinity.
  • the edge of signal 3 is located in the crosstalk area.
  • the lower order upper wave signal 6 and the upper wave signal 8 correspond to the barrier of the high crosstalk sensitivity signal 7, so that the upper wave signal 7 is not affected by the residual spectral components and is allocated to the non-crosstalk region of the matched spectral resource.
  • other uplink signals are arranged in order from high to low in order from the middle to the two sides.
  • the two low crosstalk sensitivity signals are arbitrarily arranged at both ends, and the other upper wave signals are arranged according to The order of modulation is arranged from the middle to the two sides in descending order.
  • the other upper wave signals include five upper wave signals, and the modulation order is 32QAM, 16QAM, 16QAM, 8QAM and 8QAM, the upper wave signal with the modulation order of 32QAM is placed in the middle, and the upper wave signal with the modulation order of 16QAM is placed on both sides of the 32QAM upper wave signal, and the two modulation orders are placed.
  • the upper wave signals for 8QAM are arranged at both ends.
  • FIG. 13 is a flowchart of Embodiment 3 of a method for reducing crosstalk cost according to the present invention.
  • Embodiment 3 does not need to reduce the filtering bandwidth of the through signal, and the method includes: Step 1301: The wave signal group allocates a transmission path, and the upper wave signal group includes at least two uplink signals having the same transmission path, and the upper wave signal of the upper wave signal group which is least affected by the crosstalk cost is used as the low crosstalk sensitivity signal.
  • the transmission path is assigned to the upper wave signal group, that is, each uplink signal of the upper wave signal group is assigned the same routing information.
  • the uplink signal having the same transmission path is used as an uplink signal group, and each of the uplink signal groups includes at least two uplink signals having the same transmission path.
  • upper wave signal 11 40G PDM-QPSK
  • upper wave signal 12 dual carrier 400G PDM-16QAM
  • upper wave signal 13 100G PDM-QPSK
  • the upper wave signal 14 dual-carrier 400G PDM-16QAM
  • the upper wave signal 15 40G PDM-QPSK
  • the upper wave signal 11 and the upper wave signal 12 are divided into the fifth upper wave signal group, and the upper wave signal 13, the upper wave signal 14 and the upper wave signal 15 are divided into the sixth upper wave signal group.
  • Assigning a transmission path to the fifth upper wave signal group and the sixth upper wave signal group respectively that is, assigning a routing information to each of the upper wave signals in the fifth upper wave signal group and the sixth upper wave signal group.
  • the routing information allocated by the two upper wave signals in the fifth upper wave signal group is the same; the routing information allocated by the three upper wave signals in the sixth upper wave signal group is the same.
  • a path computation element is used to allocate a transmission path for the upper wave signal group.
  • the shortest transmission path is preferentially selected.
  • Step 1302 Select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group.
  • each downlink signal After selecting the transmission path, there are multiple downlink signals on the transmission path, and each downlink signal will get a free spectrum resource after the downlink, as shown in Figure 14, giving each uplink signal group multiple idle.
  • a matching spectrum resource is selected in the spectrum resource, and the selected idle spectrum resource is allocated to the uplink signal.
  • the matched spectral resource is a continuous spectrum resource, and the spectral width of the spectral resource is greater than a sum of spectral widths of all uplink signals in the upper wave signal group.
  • the upper wave signal 11 and the upper wave signal 12 are assigned to the fifth upper wave signal group, and a fifth idle wave signal group is allocated a continuous idle spectrum resource 9 , and the spectral width of the idle spectrum resource 9 is larger than the upper wave signal 11 and
  • the upper spectrum signal 12 is the sum of the spectral widths of the two upper wave signals, and the idle spectrum resource 9 is used as the matching spectrum resource.
  • the upper wave signal 13, the upper wave signal 14 and the upper wave signal 15 are assigned to the sixth upper wave signal group, and a sixth idle wave signal group is allocated a continuous idle spectrum resource 8, and the spectral width of the idle spectrum resource 8 is larger than The sum of the spectral widths of the three upper wave signals of the upper wave signal 13, the upper wave signal 14, and the upper wave signal 15.
  • the transmission path is re-allocated for the uplink signal group.
  • Step 1303 Allocating a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink signal group, and assigning a non-crosstalk region of the matched spectrum resource to other ones in the uplink signal group Wave signal.
  • the other uplink signals include a low crosstalk sensitivity signal, any one or more of a high crosstalk sensitivity signal and a multicarrier uplink wave signal that are more affected by the crosstalk cost than the low crosstalk sensitivity signal.
  • the upper wave signal group includes two uplink signals having the same transmission path and two or more transmission paths, and the uplink signal having the least influence on the crosstalk cost of the upper wave signal group is used as a low crosstalk sensitivity signal, and the matched spectrum is used.
  • the crosstalk region of the resource is allocated to the low crosstalk sensitivity signal in the upper wave signal group, and the non-crosstalk region of the matched spectrum resource is allocated to other uplink signals in the upper wave signal group, and there are two specific happening: In the first case, when the uplink signal includes two uplink signals having the same transmission path, an uplink signal having the least influence on the crosstalk cost of the upper wave signal group is used as the low crosstalk sensitivity signal:
  • An area of the matched spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another upstream signal such that the other upper wave signal is in close proximity to the low crosstalk sensitivity signal.
  • the crosstalk cost of the low crosstalk sensitivity signal is less affected by the crosstalk cost, but for high order modulation or multicarrier uplink signals, The crosstalk caused by ROADM is costly and cannot be ignored. Therefore, in order to reduce the influence of the crosstalk cost on the uplink signal, an area of the matched spectrum resource immediately adjacent to the through signal is allocated to the low crosstalk sensitivity signal, so that the low crosstalk sensitivity signal and the through signal are Immediately, that is, the low crosstalk sensitivity signal is located in the crosstalk region.
  • Another uplink signal of the upper wave signal group may be any one of a low crosstalk sensitivity signal, a high crosstalk sensitivity signal that is greatly affected by the crosstalk cost of the low crosstalk sensitivity signal, or a multicarrier uplink wave signal.
  • An area of the matching spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another uplink signal. Since the crosstalk area with residual spectral components is small, it is generally a minimum variation granularity, i.e., 12.5 GHz.
  • a low crosstalk sensitivity signal can completely cover the crosstalk area with residual spectral components. Therefore, another up-wave signal can be in the non-crosstalk region as long as it is in close proximity to the low crosstalk sensitivity signal.
  • the matched spectrum resource 9 is assigned to the fifth upper wave signal group, and the upper wave signal 11 is adjacent to the through signal 11 and the upper wave signal 12 is immediately adjacent to the upper wave signal 11.
  • the low crosstalk sensitivity signal 11 is located in the crosstalk region with residual spectral components, and the high crosstalk sensitivity signal 12 is located in the non-crosstalk region.
  • the matched spectrum resource 9 is assigned to the fifth upper wave signal group, and the upper wave signal 11 is adjacent to the through signal 12, and the upper wave signal 12 is immediately adjacent to the upper wave signal 11.
  • the low crosstalk sensitivity signal 11 is located in the crosstalk region with residual spectral components, and the high crosstalk sensitivity signal 12 is located in the non-crosstalk region.
  • the second case when the upper wave signal group includes two or more transmission paths having the same transmission path No., and the two upper wave signals in the upper wave signal group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal:
  • the low crosstalk sensitivity signal is less affected by the crosstalk penalty caused by the residual spectral components, but for high-order modulation or multi-carrier uplink signals, the crosstalk caused by the ROADM is costly and cannot be ignored. of. Sorting the upper wave signals in the upper wave signal group, the two low crosstalk sensitivity signals are respectively arranged at both ends, and the other upper wave signals are arranged in the middle, so that when the matched spectrum resources are allocated to the upper wave signal group Immediately adjacent to any of the through signals adjacent to the matched spectrum resource. The two low crosstalk sensitivity signals in the upper wave signal group serve as a barrier to protect other upper wave signals.
  • the matched spectrum resource 8 is assigned to the third upper wave signal group, and the three upper wave signals in the sixth upper wave signal group are sorted, and the low order upper wave signal 13 is arranged.
  • the upper wave signal 14 is arranged on both sides, and the high crosstalk sensitivity signal 18 is arranged in the middle, and the matched spectrum resource 8 is allocated to the arranged sixth upper wave signal group.
  • the low-order upper wave signal 13 is adjacent to the through signal 10, that is, the upper wave signal 13 is located in the crosstalk region, the high order upper wave signal 14 is located in the non-crosstalk region, and the low order upper wave signal 15 is immediately adjacent to the high order.
  • the low-order upper wave signal 13 and the upper wave signal 15 correspond to the barrier of the high crosstalk sensitivity signal 14, so that the high-order upper wave signal 14 is not affected by the residual spectral components and is located in the non-crosstalk region.
  • the positions of the low-order upper wave signal 13 and the upper wave signal 15 can be interchanged.
  • other uplink signals are arranged in order from high to low in order from the middle to the two sides.
  • the two low crosstalk sensitivity signals are arbitrarily arranged at both ends, and the other upper wave signals are arranged according to The order of modulation is arranged from the middle to the two sides in descending order.
  • the other uplink signals include five upper-wave signals, and the modulation orders are 32QAM, 16QAM, 16QAM, 8QAM, and 8QAM, respectively, and the modulation order is 32QAM.
  • the upper wave signal is placed in the middle, and an upper wave signal with a modulation order of 16QAM is placed on each side of the 32QAM upper wave signal, and two upper wave signals with a modulation order of 8QAM are arranged at both ends.
  • the positions of the upper wave signals at the same modulation order level can be interchanged.
  • the positions of the upper wave signals of the two modulation orders 16QAM can be interchanged, and the two upper wave signals of the modulation order 8QAM are modulated. Locations are interchangeable.
  • FIG. 16 is a schematic structural diagram of Embodiment 4 of a device for reducing crosstalk cost according to the present invention.
  • Embodiment 4 is a device corresponding to the method in Embodiment 1, and the device includes:
  • the first path allocation module 1601 is configured to allocate a transmission path to the upper wave signal group, and each of the upper wave signal groups includes at least one uplink signal having the same transmission path.
  • the first resource selection module 1602 is configured to select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group.
  • the bandwidth reduction module 1603 is configured to reduce a filtering bandwidth of the at least one through signal adjacent to the matched spectrum resource.
  • the first spectrum allocation module 1604 is configured to allocate the matched spectrum resource to the uplink signal group such that the uplink signal group is in close proximity to a through signal of a reduced filtering bandwidth.
  • FIG. 17 is a schematic structural diagram of Embodiment 5 of a device for reducing crosstalk cost according to the present invention.
  • Embodiment 5 is a device corresponding to the method in Embodiment 2, where the device includes:
  • the first grouping module 1701 is configured to divide each of the uplink signals into an uplink signal group; or, to divide the uplink signal having the same transmission path into an uplink signal group.
  • the first path allocation module 1601 is configured to allocate a transmission path to the upper wave signal group, and each of the upper wave signal groups includes at least one uplink signal having the same transmission path.
  • the first resource selection module 1602 is configured to select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectrum widths of all uplink signals in the uplink signal group.
  • the first resource selection module 1602 includes:
  • the searching unit 1702 is configured to search, on the transmission path, a through signal that is the same as the uplink signal group transmission path;
  • the selecting unit 1703 is configured to select a matching spectrum resource adjacent to the through signal.
  • the bandwidth reduction module 1603 is configured to reduce a filtering bandwidth of the at least one through signal adjacent to the matched spectrum resource.
  • the bandwidth reduction module 1603 includes:
  • the reducing unit 1704 is configured to reduce a filtering bandwidth of the same through signal as the uplink signal group transmission path.
  • the first spectrum allocation module 1604 is configured to allocate the matched spectrum resource to the uplink signal group such that the uplink signal group is in close proximity to a through signal of a reduced filtering bandwidth.
  • the spectrum allocation module 1604 includes:
  • a first allocation unit 1705 configured to allocate a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink signal group, and allocate a non-crosstalk region of the matched frequency offset resource to the uplink wave Other upstream signals in the signal group.
  • the allocating unit 1705 includes:
  • a first allocation subunit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the through signal to the low crosstalk sensitivity signal, so that the low crosstalk sensitivity signal is in close proximity to the direct communication signal;
  • a second allocation subunit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the low crosstalk sensitivity signal to another uplink signal, such that the another uplink signal and the low crosstalk sensitivity signal Immediately.
  • the uplink signal group includes two uplink signals having the same transmission path, and the two uplink signals in the uplink signal group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal.
  • the first allocation unit 1705 includes: a sorting subunit, configured to sort the upper wave signals in the upper wave signal group, arrange two low crosstalk sensitivity signals at both ends, and arrange other upper wave signals in the middle;
  • a third allocation subunit configured to allocate any one of the matched spectral resources adjacent to the through signal to the arranged upper wave signal group, such that the aligned upper wave signal group is in close proximity to the through signal.
  • FIG. 18 is a schematic structural diagram of Embodiment 6 of a device for reducing crosstalk cost according to the present invention.
  • Embodiment 6 is a device corresponding to the method in Embodiment 3, where the device includes:
  • a second path allocation module 1801 configured to allocate a transmission path to the upper wave signal group, each of the uplink wave signal groups includes at least two uplink signals having the same transmission path, and minimizing the influence of the crosstalk cost in the upper wave signal group
  • the upper wave signal acts as a low crosstalk sensitivity signal.
  • the second resource selection module 1802 is configured to select a matching spectrum resource on the transmission path, where the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group.
  • the uplink signal includes two uplink signals having the same transmission path, and an uplink signal having the least influence on crosstalk cost in the uplink signal group is used as a low crosstalk sensitivity signal, and the second spectrum is used.
  • the allocation module 1802 includes:
  • a second allocation unit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the through signal to the low crosstalk sensitivity signal, so that the low crosstalk sensitivity signal is in close proximity to the through signal;
  • a third allocation unit configured to allocate, in the matched spectrum resource, an area immediately adjacent to the low crosstalk sensitivity signal to another uplink signal, such that the another uplink signal and the low crosstalk sensitivity signal are in close proximity .
  • the uplink signal group includes two uplink signals having the same transmission path, and the two uplink signals in the uplink signal group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal.
  • the second spectrum allocation module 1802 includes:
  • a sorting unit configured to sort the upper wave signals in the upper wave signal group, arrange two low crosstalk sensitivity signals at both ends, and arrange other upper wave signals in the upper wave signal group in the middle;
  • a fourth allocation unit configured to allocate any one of the matched spectrum resources adjacent to the through signal to the arranged upper wave signal group, so that the arranged upper wave signal group is in close proximity to the through signal.
  • a second spectrum allocation module 1803 configured to allocate a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink signal group, and allocate a non-crosstalk region of the matched spectrum resource to the uplink wave Other upstream signals in the signal group.
  • the device further includes:
  • a second grouping module configured to divide each of the uplink signals into an upper wave signal group; or, divide the upper wave signal having the same transmission path into an upper wave signal group.
  • FIG. 19 is a schematic structural diagram of Embodiment 7 of an apparatus for reducing crosstalk cost according to the present invention.
  • the apparatus includes a first memory 1901 and a first processor 1902, where the first memory 1901 is configured to store an instruction, the first processor. 1902 is used to retrieve an instruction, where the instruction includes:
  • each of the upper wave signal groups including at least one uplink signal having the same transmission path;
  • a matching spectrum resource includes:
  • the upper wave signal group includes two upper and lower wave signals having the same transmission path, and the upper wave signal of the upper wave signal group having the least influence on the crosstalk cost is used as the low crosstalk sensitivity signal, and the
  • the allocation of the matched spectrum resources by the wave signal group includes: Allocating a crosstalk region of the matched spectrum resource to a low crosstalk sensitivity signal in the uplink signal group, and assigning a non-crosstalk region of the matched frequency offset resource to other uplink signals in the uplink signal group .
  • the uplink signal includes two uplink signals having the same transmission path, and an uplink signal having the least influence on the crosstalk cost of the uplink signal group is used as a low crosstalk sensitivity signal, where the matched spectrum resource is The crosstalk region is allocated to the low crosstalk sensitivity signal in the uplink wave signal group, and the non-crosstalk region of the matched frequency offset resource is allocated to other uplink signals in the uplink wave signal group, including:
  • An area of the matched spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another upstream signal such that the other upper wave signal is in close proximity to the low crosstalk sensitivity signal.
  • the upper wave signal group includes two uplink signals having the same transmission path, and the two uplink signals in the upper wave signal group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal, and the matching is performed.
  • the crosstalk region of the spectrum resource is allocated to the low crosstalk sensitivity signal in the uplink signal group, and the non-crosstalk region of the matched frequency offset resource is allocated to other uplink signals in the uplink signal group, including:
  • Arranging the other upper wave signals in the middle includes:
  • the other upper wave signals are sequentially arranged from the middle to the two sides in the order of the modulation order from high to low.
  • the reducing the filtering bandwidth of the at least one through signal adjacent to the matched spectrum resource includes:
  • a filter bandwidth of at least one through signal adjacent to the matched spectral resource is reduced by a wavelength selective switch.
  • the method further includes: Dividing each upper wave signal into an upper wave signal group;
  • the upper wave signal with the same transmission path is divided into an upper wave signal group.
  • FIG. 20 is a schematic structural diagram of Embodiment 7 of a device for reducing crosstalk cost according to the present invention.
  • the device includes a first memory 2001 and a first processor 2002, where the first memory 2001 is configured to store an instruction, the first processor 2002 is used to retrieve instructions, the instructions include:
  • the upper wave signal group includes at least two uplink signals having the same transmission path, and the upper wave signal in the upper wave signal group having the least influence on the crosstalk cost is used as the low crosstalk sensitivity signal ;
  • the matched spectrum resource is continuous and the spectrum width is greater than a sum of spectral widths of all uplink signals in the uplink signal group; and the crosstalk region of the matched spectrum resource is Assigning to the low crosstalk sensitivity signal in the upper wave signal group, assigning a non-crosstalk region of the matched spectral resource to other uplink signal in the upper wave signal group.
  • the uplink signal includes two uplink signals having the same transmission path, and an uplink signal having the least influence on the crosstalk cost of the uplink signal group is used as a low crosstalk sensitivity signal, where the matched spectrum resource is The crosstalk region is allocated to the low crosstalk sensitivity signal in the uplink signal group, and the non-crosstalk region of the matched spectrum resource is allocated to other uplink signals in the uplink signal group, including:
  • An area of the matched spectral resource immediately adjacent to the low crosstalk sensitivity signal is assigned to another upstream signal such that the other upper wave signal is in close proximity to the low crosstalk sensitivity signal.
  • the upper wave signal group includes two uplink signals having the same transmission path, and the two uplink signals in the upper wave signal group that are least affected by the crosstalk cost are used as the low crosstalk sensitivity signal, and the matching is performed.
  • a crosstalk region of the spectrum resource is allocated to the low crosstalk sensitivity signal in the upper wave signal group, and a non-crosstalk region of the matched frequency offset resource is allocated to the upper wave signal group His wave signal includes:
  • the command is executed before the transmission path is allocated to the upper wave signal group:
  • Each of the upper wave signals is divided into an upper wave signal group; or, the upper wave signal having the same transmission path is divided into an upper wave signal group.

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Abstract

本发明提供了一种降低串扰代价的方法和装置，包括：给上波信号组分配传输路径；在所述传输路径上选取一个匹配频谱资源，所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和；缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽；给所述上波信号组分配所述匹配频谱资源，使得所述上波信号组与缩小滤波带宽的直通信号紧邻；由于在缩小直通信号滤波带宽时，相应的会缩小在下路下波信号后，残余在直通信号边缘的光谱分量，从而降低了串扰信号分量，无需在匹配频谱资源上预留一部分带宽，不仅提高了系统频谱资源利用率，还能有效的抑制串扰代价。

Description

一种减低串扰代价的方法和装置
技术领域
本发明涉及光通信技术领域， 尤其涉及一种降低串扰代价的方法和装 置。 背景技术
随着通信技术的不断发展，传统的光通信系统中点到点线路通信子网的 拓朴结构已经无法满足通信发展的需求， 整个网络的拓朴结构逐渐向无线 网络网格 （Mesh )化发展。 为了保证光网络的透明性， 避免过多的光-电- 光转换，在密集光波复用（ Dense Wavelength Division Multiplexing, DWDM ) 系统中， 通过远程配置可重构光分插复用器 （ Reconfigurable Optical Add-Drop Multiplexer, ROADM ) 的参数， 使其进行光学调度， 可以动态 上下业务波长， 在网络拓朴或者业务分布发生变化时能够迅速响应， 使光 网络更智能化， 实现业务的灵活调度。
然而， RODAM的使用会给光信号的传输带来串扰代价， 其产生的原因 如图 1所示： 对于 ROADM中的一个某个维度， 需要下路中心波长 λΐ 同 时上路一个相同波长的业务信号。 由于波长选择开关（ Wavelength Selective Switch, WSS ) 的滤波曲线的不完美性， 通过 WSS选择下路的中心波长 时， 无法将原有的中心波长 的信号完全下路， 在该通道的边缘将产生一 些中心波长 的残留光谱。 由于上路的上波信号与下路的中心波长 的波 长相同， 上波信号将占据与中心波长 相同的频谱资源， 因此， 中心波长 的残留光谱即成为上波信号的串扰， 即产生了串扰代价。 该串扰将伴随 着上波信号一起传输， 由于该串扰分量与上波信号分量具有相同的频谱， 一旦进入上波信号中将难以消除， 从而影响业务信号的传输性能。
目前， 为了抑制 WDM 系统中串扰代价对正交频分复用 （Orthogonal
Frequency Division Multiplexing , OFDM )信号的影响， 常用的降低串扰代 价的方法如图 2所示： 将输入信号通过 ROADM下路下波信号， 假设下路 的下波信号为 4个子载波信号， 由于 ROADM中的波长选择开关不能提供 完美的滤波曲线， 因此， 在下波信号原有的频谱边缘位置仍然残留了一些 光谱分量， 该光谱分量即成为上波信号的串扰。 为了降低串扰代价， 在上 路新的上波信号时， 在上波信号和直通信号之间预留一定的保护带宽， 则 上路的上波信号的子载波个数减少， 降低了残余光谱分量对上波信号的串 扰。 如图 3所示， 上路的上波信号为 3个同样波长的子载波。
上述方法降低串扰代价时， 存在如下缺点：
为了抑制串扰代价， 在 ROADM上路上波信号时， 预留了一定的保护 带宽， 造成了系统频谱资源的浪费；
其次， 为了保证传输容量不变， 在上路上波信号时， 需要采用比下波 信号更高阶的调制方式， 调制阶数越高， 相同的残余光谱分量带来的串扰 代价越大， 此方法并不能很好的抑制串扰代价的影响， 并且， 采用高阶的 调制方式还会缩短信号的传输距离。 发明内容
有鉴于此， 本发明提供了一种降低串扰代价的方法和装置， 无需预留 保护带宽即可降低串扰代价的影响。
本发明实施例第一方面提供一种降低串扰代价的方法，所述方法包括： 给上波信号组分配传输路径， 每个上波信号组包括至少一个传输路径 相同的上波信号；
在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续 的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽； 给所述上波信号组分配所述匹配频谱资源， 使得所述上波信号组与缩 小滤波带宽的直通信号紧邻。
本发明实施例第一方面第一种可能的实施方式中， 所述在所述传输路 径上选取一个匹配频谱资源包括：
在所述传输路径上查找与所述上波信号组传输路径相同的直通信号； 选取一个与所述直通信号相邻的匹配频谱资源；
则所述缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽 包括： 缩小与所述上波信号组传输路径相同的直通信号的滤波带宽。
本发明实施例第一方面第二种可能的实施方式中， 所述上波信号组包 括两个以及两个以上传输路径相同的上波信号， 将所述上波信号组中受串 扰代价影响最小的上波信号作为低串扰敏感度信号， 所述给所述上波信号 组分配所述匹配频语资源包括：
将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的 其他上波信号。
结合本发明实施例第一方面第二种可能的实施方式， 在第三种可能的 实施方式中， 所述上波信号包括两个传输路径相同的上波信号， 将所述上 波信号组中受串扰代价影响最小的一个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的 其他上波信号包括：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
结合本发明实施例第一方面第二种可能的实施方式， 在第四种可能的 实施方式中， 所述上波信号组包括两个以上传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的两个上波信号作为低串扰敏感度 信号， 所述将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低 串扰敏感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号 组中的其他上波信号包括：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
结合本发明实施例第一方面第四种可能的实现方式， 在第五种可能的 实现方式中， 所述将其他的上波信号排列在中间包括：
将其他的上波信号按照调制阶数由高到低的顺序从中间向两边依次排 歹I。
结合本发明实施例第一方面至第一方面第五种可能的实现方式， 在第 六种可能的实现方式中， 所述缩小与所述匹配频谱资源相邻的至少一个直 通信号的滤波带宽包括：
通过波长选择开关缩小与所述匹配频谱资源相邻的至少一个直通信号 的滤波带宽。
结合本发明实施例第一方面至第一方面第五种可能的实现方式， 在第 七种可能的实现方式中， 所述给上波信号组分配传输路径前还包括：
将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。
本发明实施例第二方面提供一种降低串扰代价的方法，所述方法包括： 给上波信号组分配传输路径， 所述上波信号组包括至少两个传输路径 相同的上波信号， 将所述上波信号组中受串扰代价影响最小的上波信号作 为低串扰敏感度信号；
在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续 的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频谱资源的非串扰区域分配给所述上波信号组中的 其他上波信号。
本发明实施例第二方面第一种可能的实现方式中， 所述上波信号包括 两个传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小 的一个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源的串扰 区域分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频谱资源 的非串扰区域分配给所述上波信号组中的其他上波信号包括：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻； 将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
本发明实施例第二方面第二种可能的实施方式中， 所述上波信号组包 括两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影 响最小的两个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源 的串扰区域分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频 偏资源的非串扰区域分配给所述上波信号组中的其他上波信号包括：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将所述上波信号组中其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
结合本发明实施例第二方面至第二方面第二种可能的实施方式， 在第 三种可能的实施方式中， 所述给上波信号组分配传输路径前还包括：
将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。
本发明实施例第三方面提供一种降低串扰代价的装置，所述装置包括： 第一路径分配模块， 用于给上波信号组分配传输路径， 每个上波信号 组包括至少一个传输路径相同的上波信号；
第一资源选取模块， 用于在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有上波 信号的频谱宽度的和；
带宽缩小模块， 用于缩小与所述匹配频谱资源相邻的至少一个直通信 号的滤波带宽；
第一频谱分配模块， 用于给所述上波信号组分配所述匹配频谱资源， 使得所述上波信号组与缩小滤波带宽的直通信号紧邻。
本发明实施例第三方面第一种可能的实施方式中， 所述第一资源选取 模块包括：
查找单元， 用于在所述传输路径上查找与所述上波信号组传输路径相 同的直通信号；
选取单元， 用于选取一个与直通信号相邻的匹配频谱资源；
则所述带宽缩小模块包括：
缩小单元， 用于缩小与所述上波信号组传输路径相同的直通信号的滤 波带宽。
本发明实施例第三方面第二种可能的实施方式中， 所述上波信号组包 括两个以及两个以上传输路径相同的上波信号， 将所述上波信号组中受串 扰代价影响最小的上波信号作为低串扰敏感度信号， 所述第一频谱分配模 块包括：
第一分配单元， 用于将所述匹配频谱资源的串扰区域分配给所述上波 信号组中的低串扰敏感度信号， 将所述匹配频偏资源的非串扰区域分配给 所述上波信号组中的其他上波信号。
结合本发明实施例第三方面第二种可能的实施方式， 在第三种可能的 实施方式中， 所述上波信号包括两个传输路径相同的上波信号， 将所述上 波信号组中受串扰代价影响最小的一个上波信号作为低串扰敏感度信号， 所述第一分配单元包括：
第一分配子单元， 用于将所述匹配频谱资源中与直通信号紧邻的区域 分配给所述低串扰敏感度信号， 使得所述低串扰敏感度信号与所述直通信 号紧邻；
第二分配子单元， 用于将所述匹配频谱资源中与所述低串扰敏感度信 号紧邻的区域分配给另一个上波信号， 使得所述另一个上波信号与所述低 串扰敏感度信号紧邻。
结合本发明实施例第三方面第二种可能的实施方式， 在第四种可能的 实施方式中， 所述上波信号组包括两个以上传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的两个上波信号作为低串扰敏感度 信号， 所述第一分配单元包括：
排序子单元， 用于对所述上波信号组中的上波信号排序， 将两个低串 扰敏感度信号排列在两端， 将其他的上波信号排列在中间；
第三分配子单元， 用于将与直通信号相邻的任意一个所述匹配频谱资 源分配给排列后的上波信号组， 使得所述排列后的上波信号组与所述直通 信号紧邻。
结合本发明实施例第三方面至第三方面第四种可能的实施方式， 所在 第五种可能的实现方式中， 述装置还包括：
第一分组模块， 用于将每个上波信号分为一个上波信号组；
或者，
用于将传输路径相同的上波信号分为一个上波信号组。
本发明实施例第四方面提供一种降低串扰代价的装置，所述装置包括： 第二路径分配模块， 用于给上波信号组分配传输路径， 所述上波信号 组包括至少两个传输路径相同的上波信号， 将所述上波信号组中受串扰代 价影响最小的上波信号作为低串扰敏感度信号；
第二资源选取模块， 用于在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有上波 信号的频谱宽度的和；
第二频谱分配模块， 用于将所述匹配频谱资源的串扰区域分配给所述 上波信号组中的低串扰敏感度信号， 将所述匹配频谱资源的非串扰区域分 配给所述上波信号组中的其他上波信号。
本发明实施例第四方面第一种可能的实现方式中， 所述上波信号包括 两个传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小 的一个上波信号作为低串扰敏感度信号， 所述第二频谱分配模块包括： 第二分配单元， 用于将所述匹配频谱资源中与直通信号紧邻的区域分 配给所述低串扰敏感度信号， 使得所述低串扰敏感度信号与所述直通信号 紧邻；
第三分配单元， 用于将所述匹配频谱资源中与所述低串扰敏感度信号 紧邻的区域分配给另一个上波信号， 使得所述另一个上波信号与所述低串 扰敏感度信号紧邻。
本发明实施例第四方面第二种可能的实施方式中， 所述上波信号组包 括两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影 响最小的两个上波信号作为低串扰敏感度信号， 所述第二频谱分配模块包 括：
排序单元， 用于对所述上波信号组中的上波信号排序， 将两个低串扰 敏感度信号排列在两端，将所述上波信号组中其他的上波信号排列在中间； 第四分配单元， 用于将与直通信号相邻的任意一个所述匹配频谱资源 分配给排列后的上波信号组， 使得所述排列后的上波信号组与所述直通信 号紧邻。
结合本发明实施例第四方面至第四方面第二种可能的实现方式， 在第 三种可能的实现方式中， 所述装置还包括：
第二分组模块， 用于将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。
由上述内容可知， 本发明有如下有益效果：
本发明实施例提供了一种减低串扰代价的方法， 给上波信号组分配传 输路径； 在所述传输路径上选取一个匹配频谱资源； 缩小与所述匹配频谱 资源相邻的至少一个直通信号的滤波带宽； 给所述上波信号组分配所述匹 配频谱资源， 由于在缩小直通信号滤波带宽时， 相应的会缩小在下路下波 信号后， 残余在直通信号边缘的光谱分量， 从而降低了串扰代价， 无需在 匹配频谱资源上预留一部分保护带宽， 提高了系统中频谱资源利用率； 本发明实施例还提供了一种降低串扰代价的方法， 给上波信号组分配 传输路径， 所述上波信号组包括至少两个传输路径相同的上波信号， 将所 述上波信号组中受串扰代价影响最小的上波信号作为低串扰敏感度信号； 在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续的并 且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 将所述 匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频谱资源的非串扰区域分配给所述上波信号组中的其他上波信 号， 由于低串扰敏感度信号所受到残余光谱分量的影响较小， 将低串扰敏 感度信号分配在有残余光谱分量的串扰区域， 将比低串扰敏感度信号受串 扰代价影响大的其他的高串扰敏感度信号分配在没有残余光谱分量的非串 扰区域， 无需预留一定的保护带宽， 上波信号无需采用比下波信号更高阶 的调制方式， 有效的降低了所述上波信号组所受到的串扰代价， 并且没有 浪费所述匹配频谱资源。 附图说明 实施例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员 来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附 图。
图 1 为现有技术产生串扰代价的原因示意图；
图 2 为现有技术降低串扰代价方法的示意图；
图 3 为不同调制格式、 不同比特率的上波信号由于串扰代价带来的光 信噪比代价的仿真结果示意图；
图 4为本发明一种降低串扰代价的方法实施例一流程示意图； 图 5为本发明连续的频谱信号进入 ROADM系统下波后串扰信号示意 图；
图 6为本发明连续的频谱信号进入 ROADM系统下波后空闲频谱资源 示意图；
图 7为本发明缩小与所述匹配频谱资源相邻的至少一个直通信号的滤 波带宽示意图；
图 8 ( a )为本发明只缩小直通信号 2与空闲频谱资源 2相邻侧的滤波 带宽 701后串扰信号示意图；
图 8 ( b )为本发明只缩小直通信号 3与空闲频谱资源 2相邻侧的滤波 带宽 702后串扰信号示意图；
图 8 ( c )为本发明同时缩小空闲频谱资源 2与直通信号 2和直通信号
3相邻侧的滤波带宽 701和 702后串扰信号示意图；
图 9 ( a )为本发明第一个上波信号组与缩小滤波带宽的直通信号 2紧 邻示意图； 图 9 (b)为本发明第一个上波信号组与缩小滤波带宽的直通信号 3紧 邻示意图；
图 10为本发明一种降低串扰代价的方法实施例二流程示意图； 图 11 (a) 为本发明缩小与所述上波信号组传输路径相同的直通信号 的滤波带宽示意图；
图 11 (b) 为本发明缩小与所述上波信号组传输路径相同的直通信号 的滤波带宽后串扰信号示意图；
图 12 (a)为本发明将匹配频谱资源分配给第四个上波信号组示意图； 图 12 (b)为本发明将匹配频谱资源分配给第三个上波信号组示意图； 图 13为本发明一种降低串扰代价的方法实施例三流程图；
图 14为本发明连续的频谱信号下波后空闲频谱资源示意图； 图 15 (a)为本发明将匹配频谱资源 9紧邻直通信号 11的区域分配给 第五个上波信号组示意图；
图 15 (b)为本发明将匹配频谱资源 9紧邻直通信号 12的区域分配给 第五个上波信号组示意图；
图 15 (c) 为本发明将匹配频谱资源 8分配给第三个上波信号组示意 图；
图 16为本发明一种降低串扰代价的装置实施例四结构示意图； 图 17为本发明一种降低串扰代价的装置实施例五结构示意图； 图 18为本发明一种降低串扰代价的装置实施例六结构示意图； 图 19为本发明一种降低串扰代价的装置实施例七结构示意图； 图 20为本发明一种降低串扰代价的装置实施例七结构示意图。 具体实施方式
为了给出无需预留一定保护带宽即可降低串扰代价的实现方案， 本发 明实施例提供了一种减低串扰代价的方法和装置， 以下结合说明书附图对 本发明的优选实施例进行说明， 应当理解， 此处所描述的优选实施例仅用 于说明和解释本发明， 并不用于限定本发明。 并且在不沖突的情况下， 本 申请中的实施例及实施例中的特征可以相互组合。 下面结合附图对本发明具体实施例进行详细说明
首先， 对不同调制格式、 不同比特率的上波信号由于串扰代价带来的 光信噪比代价的仿真结果进行说明。
图 3 为不同调制格式、 不同比特率的上波信号由于串扰代价带来的光 信噪比代价的仿真结果示意图。 从图中可以看出： 10G比特率的非归零调 制格式 （ non return to zero, NRZ )、 40G比特率的归零 -差分正交相移键控 调制格式 ( return to zero differential quadrature reference phase shift keying , RZ-DQPSK ) 以及 100G 比特率的偏振复用正交相移键控调制格式 ( Polarization division multiplexing quadrature phase shift keying , PDM-QPSK ) 的上波信号， 对串扰代价的灵敏度基本一致， 如图所示， 上 述三种上波信号产生 0.5dB的光信噪比 （ optical signal noise ratio , OSNR ) 代价对应的串扰大小为 -20dB。 目前， WSS 的串扰标称值在 -30dB〜 - 35dB 之间。 因此， 对于现有的 10G、 40G以及 100G比特率的调制格式而言， 由 ROADM 系统下路下波信号后残余的光谱分量对上路上波信号所带来的串 扰代价并不是非常明显。
然而， 随着互联网用户数量、 应用种类和网络带宽等迅猛增长， 为满 足业务需求不断对网络扩容， 光网络中的单通道线路将出现 400G乃至 1T 等更高的比特率。 为了实现更高的比特率， 需要采用高阶调制方式 （如 16 正交幅度调制 ( quadrature amplitude modulation, QAM ), 32QAM等） 或 者采用多载波正交频分复用 ( Orthogonal frequency division multiplexing , OFDM )技术。 因此， 在可变带宽光网络（ Flexible bandwidth optical network, FBON )中，将出现多种比特率、多种调制格式的上波信号混合传输的现象。
在混合传输的 FBON中， 10G、 40G以及 100G比特率的调制格式的上 波信号受到串扰代价的影响仍然会较小。 但是， 对于 FBON中的高阶调制 上波信号， 在产生相同的光信噪比代价时， 对应的串扰值大小较小。 如图 3所示， 对于 16QAM调制格式的上波信号产生 0.5dB OSNR代价对应的串 扰大小为 -27dB。 同样的， 对于多载波上波信号， 由于直通信号边缘的残留 光谱分量与边缘载波的中心频率很接近， 因此， 残留光谱分量对于边缘载 波的串扰代价也是非常大的。 总之， 对于在 FBON中， 对于高阶调制或者 多载波上波信号， 由 ROADM带来的串扰代价是不可忽视的。
低串扰敏感度信号和高串扰敏感度信号是一个相对概念， 并不是一个 绝对概念， 不是所有的高阶调制上波信号都是高串扰敏感度信号。 一个上 波信号组中所包含的多个上波信号， 受串扰代价影响较 d、的信号即为低串 扰敏感度信号， 受串扰代价影响较大的信号即为高串扰敏感度信号。 例如， 当 16QAM调制格式的上波信号为高串扰敏感度信号时， 低串扰敏感度信 号可以为 8QAM调制格式的上波信号。 对于多载波调制信号而言， 不管采 用何种调制方式， 受到串扰代价都比较大， 作为高串扰敏感度信号。 在一 个上波信号组中， 将受串扰代价影响最小的一个或两个上波信号作为低串 扰敏感度信号， 其他的上波信号作为高串扰敏感度信号。
需要说明的是， 在本发明以下所述的具体的实施例中， 低串扰敏感度 信号以低阶调制信号为例； 高串扰敏感度信号以高阶调制信号或多载波调 制信号为例。 实施例一
图 4为本发明一种降低串扰代价的方法实施例一流程示意图， 所述方 法包括：
步骤 401 : 给上波信号组分配传输路径， 每个上波信号组包括至少一 个传输路径相同的上波信号。
给上波信号组分配传输路径， 也就是给上波信号组的每个上波信号分 配一个相同的路由信息。
当一组连续的频谱信号进入 ROADM系统时， 所述频谱信号中包括直 通信号以及下波信号， 该频谱信号通过 WSS滤波后， 在与下波信号紧邻的 直通信号边缘残留光谱分量， 如图 5所示。
当 ROADM系统中有多个上波信号时， 可以将每一个上波信号独立作 为一个上波信号组， 即每个上波信号组中只有一个上波信号； 也可以将传 输路径相同的上波信号作为一个上波信号组， 每个上波信号组可以由一个 或者多个传输路径相同的上波信号。 若传输路径相同的上波信号较多时， 还可以将此传输路径相同的上波信号根据实际需要分成若干个上波信号 组。 还可以根据实际需要， 设置具体的限定条件对多个上波信号进行分组， 每个上波信号组中上波信号的个数也可以根据实际情况自行设定。
对多个上波信号进行分组举例说明， 支设 ROADM系统中有 5个上波 信号： 上波信号 1 ( 100G PDM-QPSK ) , 上波信号 2 (双载波 400G PDM-16QAM ) , 上波信号 3 ( 40G PDM-QPSK ) , 上波信号 4 ( 40G PDM-QPSK ), 上波信号 5 (双载波 400G PDM-16QAM ), 其中， 上波信号
1、 上波信号 2以及上波信号 3的传输路径相同， 上波信号 4和上波信号 5 的传输路径相同。
在对上述 5个上波信号进行分组时， 可以将每个上波信号作为一个上 波信号组， 即有 5个上波信号组； 也可以将传输路径相同的上波信号分为 一个上波信号组， 即有 2个上波信号组， 其中一个上波信号组包括上波信 号 1、 上波信号 2以及上波信号 3 , 另一个上波信号组包括上波信号 4和上 波信号 5。
上述具体实例只是用来对多个上波信号进行分组举例说明， 并不仅限 于上述分组方式， 还可以根据实际情况自行设定对多个上波信号分组的方 式。
本发明实施例中， 采用路径计算单元 ( path computation element, PCE ) 为上波信号组分配传输路径， 一般情况下， 优先选取最短的传输路径。
步骤 402: 在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱 资源为连续的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽 度的和。
选取好传输路径后， 在传输路径上有多个下波信号， 每个下波信号下 路后都将得到一个空闲频谱资源， 如图 6所示， 给每个上波信号组从多个 空闲频谱资源中选取一个匹配频谱资源， 将所选取的空闲频谱资源分配给 上波信号。 所述匹配频谱资源是一段连续的频谱资源， 并且频谱资源的频 谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和。
举例说明， 假设 ROADM系统中有 5个上波信号： 上波信号 1 ( 100G PDM-QPSK ), 上波信号 2 (双载波 400G PDM-16QAM ), 上波信号 3 ( 40G PDM-QPSK ), 上波信号 4 ( 40G PDM-QPSK ), 上波信号 5 (双载波 400G PDM-16QAM )。
当每个上波信号作为一个上波信号组时， 给上波信号 1所在的上波信 号组分配一个连续的， 并且频谱宽度大于上波信号 1 的频谱宽度的空闲频 谱资源作为匹配频谱资源； 给上波信号 2所在的上波信号组分配一个连续 的， 并且频谱宽度大于上波信号 2的频谱宽度的空闲频谱资源作为匹配频 谱资源， 给上波信号 3、 上波信号 4和上波信号 5所在的上波信号组分配 匹配频谱资源类似， 这里不再赘述。
当将传输路径相同的上波信号分为一个上波信号组时， 上波信号 1、 上波信号 2和上波信号 3作为第一个上波信号组； 上波信号 4和上波信号 5 作为第二个上波信号组。 给第一个上波信号组分配一个连续的空闲频谱 资源 2, 并且空闲频谱资源 2的频谱宽度大于上波信号 1、 上波信号 2和上 波信号 3三个上波信号的频谱宽度的和， 将空闲频谱资源 2作为匹配频谱 资源。 给第二个上波信号组分配一个连续的空闲频谱资源 3 , 并且空闲频 谱资源 3的频谱宽度大于上波信号 3和上波信号 4两个上波信号频谱宽度 的和， 将空闲频谱资源 3作为匹配频谱资源。
若传输路径上符合要求的空闲频谱资源有多个， 则选取其中一个作为 匹配频谱资源即可； 若传输路径上没有符合要求的空闲频谱资源， 重新为 该上波信号组分配传输路径。
步骤 403 : 缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波 带宽。
现有技术中， 传输路径中的下波信号下路后， 在与下波信号紧邻的直 通信号的边缘处残留一部分光谱分量， 如图 5所示， 残留的光谱分量会对 将要上路的上波信号产生串扰代价。
本发明实施例，在传输路径中的下波信号下路时，采用带宽可变的 WSS 缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽， 具体实施 时， 可以通过配置 Flex-ROADM的最小变化粒度 ( slice granularity ) 来实 现。 一般的， 最小变化粒度可以设置为 12.5GHZ。 如图 7所示， 假设选取 的匹配频谱资源为下波信号下路后将会产生的空闲频谱资源 2和空闲频谱 资源 3 , 则可以缩小直通信号 2与空闲频谱资源 2相邻侧的滤波带宽 701 以及直通信号 3与空闲频谱资源 2相邻侧的滤波带宽 702中的至少一个， 缩小直通信号 3与空闲频谱资源 3相邻侧的滤波带宽 703以及直通信号 4 与空闲频谱资源 3相邻侧的滤波带宽 704。
由于滤波曲线的不完美性， 在缩小与匹配频谱资源相邻的直通信号的 滤波带宽时， 同时减小了直通信号边缘处残留的光谱信号， 从而降低了残 留的光谱信号所产生的串扰代价。 以缩小与空闲频谱资源 2相邻的直通信 号 2和直通信号 3中至少任意一个直通信号的滤波带宽为例， 如图 8 ( a ) -8 ( c )三幅图所示， 图 8 ( a ) 为只缩小直通信号 2与空闲频谱资源 2相邻 侧的滤波带宽 701后示意图， 可以看出直通信号 2边缘的残留的光谱分量 减少； 图 8 ( b ) 为只缩小直通信号 3与空闲频谱资源 2相邻侧的滤波带宽 702后示意图， 可以看出直通信号 3边缘的残留的光谱分量减少； 图 8 ( c ) 为同时缩小直通信号 2与空闲频谱资源 2相邻侧的滤波带宽 701和直通信 号 3与空闲频谱资源 2相邻侧的滤波带宽 702后示意图， 可以看出直通信 号 2和直通信号 3在与空闲频谱资源 2相邻的边缘处残留的光谱分量都减 少。 缩小与空闲频谱资源 3相邻的直通信号 3和直通信号 4中至少任意一 个直通信号的滤波带宽与上述方法类似， 这里不再赘述。
残留的光谱分量在缩小直通信号的滤波带宽时， 同时被滤除一部分， 从而减小了残留光谱分量的大小， 也就降低了残留光谱分量所带来的串扰 代价，无需在上路上波信号时预留一部分保护带宽即可实现降低串扰代价。
上述具体实例只是用来对缩小匹配频谱资源相邻的直通信号的滤波带 宽举例说明， 缩小其他所选取的匹配频谱资源相邻的至少一个直通信号的 滤波带宽与上述实例类似， 这里不再——赘述。
步骤 404: 给所述上波信号组分配所述匹配频谱资源， 使得所述上波 信号组与缩小滤波带宽的直通信号紧邻。
在上路第一个上波信号组时， 第一个上波信号组中的每个上波信号在 上路后彼此紧邻， 使得整个第一个上波信号组与缩小滤波带宽的直通信号 紧邻。 如图 9 ( a ) -9 ( b )三幅图所示， 9 ( a ) 为第一个上波信号组与缩小 滤波带宽的直通信号 2 紧邻， 9 ( b ) 为第一个上波信号组与缩小滤波带宽 的直通信号 3紧邻。 当直通信号 2和直通信号 3都缩小滤波带宽时， 第一 个上波信号组可以任选一个直通信号紧邻， 与图 9 ( a ) 或图 9 ( b ) 类似。 上路第二个上波信号组与上路第一个上波信号组类似，这里不再——赘述。
由上述内容可知， 本发明实施例具有以下有益效果：
给上波信号组分配传输路径； 在所述传输路径上选取一个匹配频谱资 源； 缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽； 给所 述上波信号组分配所述匹配频谱资源， 由于在缩小直通信号滤波带宽时， 相应的会缩小在下路下波信号时， 残余在直通信号边缘的光谱分量， 从而 降低了串扰代价， 无需在匹配频谱资源上预留一部分带宽， 不仅提高了系 统频谱资源利用率， 还能有效的抑制串扰代价。 实施例二
图 10为本发明一种降低串扰代价的方法实施例二流程示意图，与实施 例一相比， 实施例二中， 将串扰区域分配给上波信号组中的低串扰敏感度 信号， 将非串扰区分配给上波信号组中的其他上波信号， 所述方法包括： 步骤 1001 : 将传输路径相同的上波信号分为一个上波信号组。
将传输路径相同的上波信号分为一个上波信号组， 可以对整个上波信号 组中的所有上波信号采用相同的传输路径传输， 减少单个上波信号传输所 占用的传输路径的个数， 便于对多个上波信号进行传输和接收。
举例说明， 假设 ROADM系统中有 5个上波信号： 上波信号 6 ( 100G PDM-QPSK ), 上波信号 7 (双载波 400G PDM-16QAM ), 上波信号 8 ( 40G PDM-QPSK ), 上波信号 9 ( 40G PDM-QPSK ), 上波信号 10 (双载波 400G PDM-16QAM )。 上波信号 6、 上波信号 7和上波信号 8传输路径相同， 分 为第三个上波信号组； 上波信号 9和上波信号 10传输路径相同， 分为第四 个上波信号组。
步骤 1002: 给上波信号组分配传输路径， 所述上波信号组包括至少一 个传输路径相同的上波信号。
此处与实施例一类似， 参考实施例一中的说明， 这里不再赘述。
步骤 1003 : 在所述传输路径上查找与所述上波信号组传输路径相同的 直通信号。 步骤 1004: 选取一个与所述直通信号相邻的匹配频谱资源。 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有 上波信号的频谱宽度的和。
由于所述直通信号与上波信号组有相同的传输路径， 因此， 靠近上波 信号组的直通信号边缘部分在后续通过 ROADM系统时， WSS不会对所述 直通信号进行滤波处理，直通信号和上波信号组中的上波信号会整体通过， 从而减小了滤波代价。
如图 11 ( a ) 所示， 直通信号 6与第三个上波信号组的传输路径相同， 直通信号 6相邻的空闲频谱资源 5为连续的并且频谱宽度大于第三个上波 信号组中上波信号 6、 上波信号 7和上波信号 8的频谱宽度的和， 则选取 空闲频谱资源 5为第三个上波信号组的匹配频谱资源。 直通信号 7与第四 个上波信号组的传输路径相同， 直通信号 7相邻的空闲频谱资源 6为连续 的并且频谱宽度大于第四个上波信号组中上波信号 9和上波信号 10的频谱 宽度的和， 则选取空闲频谱资源 6为第四个上波信号组的匹配频谱资源。
步骤 1005 : 缩小与所述上波信号组传输路径相同的直通信号的滤波带 宽。
在缩小所述与上波信号组传输路径相同的直通信号的滤波带宽时， 只 缩小所述直通信号与匹配频谱资源紧邻的一侧即可， 另外一侧可以不进行 缩小滤波带宽的处理。
如图 11 ( a )所示， 缩小直通信号 6与空闲频谱资源 5紧邻的一侧 1101 的滤波带宽， 以及缩小直通信号 7与空闲频谱资源 6紧邻的一侧 1102的滤 波带宽， 缩小滤波带宽后如图 11 ( b ) 所示。
步骤 1006: 将所述匹配频谱资源的串扰区域分配给所述上波信号组中 的低串扰敏感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波 信号组中的其他上波信号。
其中， 所述其他的上波信号包括其他的低串扰敏感度信号、 比低串扰 敏感度信号受串扰代价影响大的高串扰敏感度信号和多载波上波信号中的 任意一种或多种。
当上波信号组中只有一个上波信号时， 上路一个上波信号与实施例一 相同， 这里不再赘述。
所述上波信号组包括两个以及两个以上传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的上波信号作为低串扰敏感度信 号， 将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的 其他上波信号， 有两种具体的情况：
第一种情况， 当所述上波信号包括两个传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的一个上波信号作为低串扰敏感度 信号：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
在说明书实施方式开始对仿真结果的说明可知， 在 FBON中， 低串扰 敏感度信号受到的残留光谱分量所带来的串扰代价的影响较小， 但是对于 高阶调制或者多载波上波信号， 由 ROADM带来的串扰代价较大， 是不可 忽视的。 因此， 为了减小串扰代价对上波信号的影响， 将所述匹配频谱资 源中与直通信号紧邻的区域分配给所述低串扰敏感度信号， 也就是说， 将 串扰区域分配给低串扰敏感度信号。 上波信号组的另一个上波信号， 可以 为低串扰敏感度信号、 比低串扰敏感度信号受串扰代价影响大的高串扰敏 感度信号或者多载波上波信号中的任意一种， 将所述匹配频谱资源中与所 述低串扰敏感度信号紧邻的区域分配给另一个上波信号。 由于有残留光谱 分量的串扰区域很小， 一般为 1 个最小变化粒度， 即 12.5GHz。 一个低串 扰敏感度信号可以完全覆盖有残留光谱分量的串扰区域。 因此， 另一个上 波信号与所述低串扰敏感度信号紧邻， 即可在非串扰区域。
如图 12 ( a )所示， 将匹配频谱资源分配给第四个上波信号组， 上波信 号 9紧邻直通信号 7缩小了滤波带宽的一侧，双载波上波信号 10与上波信 号 9 紧邻。 从图中可以看出， 串扰区分配给低串扰敏感度信号 9, 非串扰 区分配给高串扰敏感度信号 10。 第二种情况： 当所述上波信号组包括两个以上传输路径相同的上波信 号， 将所述上波信号组中受串扰代价影响最小的两个上波信号作为低串扰 敏感度信号：
对所述上波信号组中的上波信号排序， 将两个受串扰代价影响最小的 上波信号作为低串扰敏感度信号排列在两端， 将其他的上波信号排列在中 间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
在 FBON中， 低串扰敏感度信号受到的残留光谱分量所带来的串扰代 价的影响较小， 但是对于高阶调制或者多载波上波信号， 由 ROADM带来 的串扰代价较大， 是不可忽视的。 对上波信号组中的上波信号排序， 两个 低串扰敏感度信号分别排列在两端， 将其他的上波信号排列在中间， 这样， 将所述匹配频谱资源分配给上波信号组时， 紧邻任意一个与所述匹配频谱 资源相邻的直通信号即可。 上波信号组中的两个低串扰敏感度信号作为保 护其他上波信号的屏障。
如图 12 ( b ) 所示， 将匹配频谱资源分配给第三个上波信号组， 给第 三个上波信号组中的三个上波信号进行排序， 将低阶的上波信号 6和上波 信号 8分别排列在两边， 将高阶的上波信号 7排列在中间， 将匹配频谱资 源分配给排列后的第三个上波信号组。 由图中可以看出， 低阶的上波信号 6位于直通信号 6缩小滤波带宽的一侧， 即串扰区域， 高阶的上波信号 7 位于非串扰区， 低阶的上波信号 8紧邻直通信号 3的边缘， 位于串扰区。 低阶的上波信号 6和上波信号 8相当于高串扰敏感度信号 7的屏障， 使上 波信号 7不受到残留的光谱分量的影响，分配到匹配频谱资源的非串扰区。
可选的， 将其他的上波信号按照调制阶数由高到低的顺序从中间向两 边依次排列。
在对上波信号组中的上波信号排序时， 若上波信号组中的上波信号个 数很多， 任意选择两个低串扰敏感度信号分别排列在两端， 将其他的上波 信号按照调制阶数由高到低的顺序从中间向两边依次排列。
举例说明， 假设其他的上波信号包括五个上波信号， 调制阶数分别为 32QAM、 16QAM, 16QAM、 8QAM和 8QAM, 将调制阶数为 32QAM的 上波信号放在最中间， 32QAM 上波信号的两边各放置一个调制阶数为 16QAM的上波信号， 将两个调制阶数为 8QAM的上波信号分别排列在两 端。 实施例三
图 13为本发明一种降低串扰代价的方法实施例三流程图，与实施例一 和实施例二相比， 实施例三无需缩小直通信号的滤波带宽， 所述方法包括： 步骤 1301 : 给上波信号组分配传输路径， 所述上波信号组包括至少两 个传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小的 上波信号作为低串扰敏感度信号。
给上波信号组分配传输路径， 也就是给上波信号组的每个上波信号分 配一个相同的路由信息。
当 ROADM系统中至少包括两个上波信号时， 将传输路径相同的上波 信号作为一个上波信号组， 每个上波信号组至少包括两个传输路径相同的 上波信号。
对多个上波信号进行分组举例说明， 支设 ROADM系统中有 5个上波 信号： 上波信号 11 ( 40G PDM-QPSK ) , 上波信号 12 (双载波 400G PDM-16QAM ), 上波信号 13 ( 100G PDM-QPSK ), 上波信号 14 (双载波 400G PDM-16QAM ), 上波信号 15 ( 40G PDM-QPSK ), 其中， 上波信号 11 和上波信号 12的传输路径相同， 上波信号 13、 上波信号 14以及上波信号 15的传输路径相同。 则将上波信号 11和上波信号 12分到第五个上波信号 组，将上波信号 13、上波信号 14以及上波信号 15分到第六个上波信号组。 为第五个上波信号组和第六个上波信号组分别分配一个传输路径， 即为第 五个上波信号组和第六个上波信号组中的每个上波信号分配一个路由信 息， 其中， 第五个上波信号组中的两个上波信号所分配的路由信息相同； 第六个上波信号组中的三个上波信号所分配的路由信息相同。
本发明实施例中， 采用路经计算单元（ path computation element, PCE ) 为上波信号组分配传输路径， 一般情况下， 优先选取最短的传输路径。 步骤 1302: 在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱 资源为连续的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽 度的和。
选取好传输路径后， 在传输路径上有多个下波信号， 每个下波信号下 路后都将得到一个空闲频谱资源， 如图 14所示， 给每个上波信号组从多个 空闲频谱资源中选取一个匹配频谱资源， 将所选取的空闲频谱资源分配给 上波信号。 所述匹配频谱资源是一段连续的频谱资源， 并且频谱资源的频 谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和。
上波信号 11和上波信号 12分到第五个上波信号组， 给第五个上波信 号组分配一个连续的空闲频谱资源 9 , 并且空闲频谱资源 9 的频谱宽度大 于上波信号 11和上波信号 12两个上波信号频谱宽度的和， 将空闲频谱资 源 9作为匹配频谱资源。 上波信号 13、 上波信号 14以及上波信号 15分到 第六个上波信号组， 给第六个上波信号组分配一个连续的空闲频谱资源 8 , 并且空闲频谱资源 8的频谱宽度大于上波信号 13、 上波信号 14以及上波 信号 15三个上波信号的频谱宽度的和。
若传输路径上符合要求的空闲频谱资源有多个， 则选取其中一个作为 匹配频谱资源即可； 若传输路径上没有符合要求的空闲频谱资源， 重新为 该上波信号组分配传输路径。
步骤 1303 : 将所述匹配频谱资源的串扰区域分配给所述上波信号组中 的低串扰敏感度信号， 将所述匹配频谱资源的非串扰区域分配给所述上波 信号组中的其他上波信号。
其中， 所述其他的上波信号包括低串扰敏感度信号、 比低串扰敏感度 信号受串扰代价影响大的高串扰敏感度信号和多载波上波信号中的任意一 种或多种。
所述上波信号组包括两个以及两个以上传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的上波信号作为低串扰敏感度信 号， 将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频谱资源的非串扰区域分配给所述上波信号组中的 其他上波信号， 有两种具体的情况： 第一种情况， 当所述上波信号包括两个传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的一个上波信号作为低串扰敏感度 信号：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
在说明书实施方式开始对仿真结果的说明可知， 在 FBON中， 低串扰 敏感度信号受到的残留光谱分量所带来的串扰代价的影响较小， 但是对于 高阶调制或者多载波上波信号， 由 ROADM带来的串扰代价较大， 是不可 忽视的。 因此， 为了减小串扰代价对上波信号的影响， 将所述匹配频谱资 源中与直通信号紧邻的区域分配给所述低串扰敏感度信号， 使得所述低串 扰敏感度信号与所述直通信号紧邻， 也就是说， 低串扰敏感度信号位于串 扰区域。 上波信号组的另一个上波信号， 可以为低串扰敏感度信号、 比低 串扰敏感度信号受串扰代价影响大的高串扰敏感度信号或者多载波上波信 号中的任意一种， 将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的 区域分配给另一个上波信号。 由于有残留光谱分量的串扰区域很小， 一般 为 1 个最小变化粒度， 即 12.5GHz。 一个低串扰敏感度信号可以完全覆盖 有残留光谱分量的串扰区域。 因此， 另一个上波信号只要紧邻所述低串扰 敏感度信号， 即可在非串扰区域。
如图 15 ( a )所示， 将匹配频谱资源 9分配给第五个上波信号组， 上波 信号 11紧邻直通信号 11 , 上波信号 12与上波信号 11紧邻。从图中可以看 出， 低串扰敏感度信号 11位于有残留光谱分量的串扰区， 高串扰敏感度信 号 12位于非串扰区。
或者， 如图 15 ( b ) 所示， 将匹配频谱资源 9分配给第五个上波信号 组， 上波信号 11紧邻直通信号 12 , 上波信号 12与上波信号 11紧邻。 从图 中可以看出， 低串扰敏感度信号 11位于有残留光谱分量的串扰区， 高串扰 敏感度信号 12位于非串扰区。
第二种情况： 当所述上波信号组包括两个以上传输路径相同的上波信 号， 并将所述上波信号组中受串扰代价影响最小的两个上波信号作为低串 扰敏感度信号：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
在 FBON中， 低串扰敏感度信号受到的残留光谱分量所带来的串扰代 价的影响较小， 但是对于高阶调制或者多载波上波信号， 由 ROADM带来 的串扰代价较大， 是不可忽视的。 对上波信号组中的上波信号排序， 两个 低串扰敏感度信号分别排列在两端， 将其他的上波信号排列在中间， 这样， 将所述匹配频谱资源分配给上波信号组时， 紧邻任意一个与所述匹配频谱 资源相邻的直通信号即可。 上波信号组中的两个低串扰敏感度信号作为保 护其他上波信号的屏障。
如图 15 ( c )所示， 将匹配频谱资源 8分配给第三个上波信号组， 给第 六个上波信号组中的三个上波信号进行排序，将低阶的上波信号 13和上波 信号 14分别排列在两边， 将高串扰敏感度信号 18排列在中间， 将匹配频 谱资源 8分配给排列后的第六个上波信号组。 由图中可以看出， 低阶的上 波信号 13紧邻直通信号 10, 即上波信号 13位于串扰区域， 高阶的上波信 号 14位于非串扰区， 低阶的上波信号 15紧邻高阶的上波信号 14。 低阶的 上波信号 13和上波信号 15相当于高串扰敏感度信号 14的屏障，使高阶的 上波信号 14不受到残留的光谱分量的影响， 位于非串扰区。 当然， 低阶的 上波信号 13和上波信号 15的位置可以互换。
可选的， 将其他的上波信号按照调制阶数由高到低的顺序从中间向两 边依次排列。
在对上波信号组中的上波信号排序时， 若上波信号组中的上波信号个 数很多， 任意选择两个低串扰敏感度信号分别排列在两端， 将其他的上波 信号按照调制阶数由高到低的顺序从中间向两边依次排列。
举例说明， 假设其他的上波信号包括五个上波信号， 调制阶数分别为 32QAM、 16QAM, 16QAM、 8QAM和 8QAM, 将调制阶数为 32QAM的 上波信号放在最中间， 32QAM 上波信号的两边各放置一个调制阶数为 16QAM的上波信号， 将两个调制阶数为 8QAM的上波信号分别排列在两 端。 当然， 处于同一调制阶数层次的上波信号的位置可以互换， 上述描述 中， 两个调制阶数为 16QAM 的上波信号的位置可以互换， 调制阶数为 8QAM的两个上波信号位置可以互换。 实施例四
图 16为本发明一种降低串扰代价的装置实施例四结构示意图， 实施例 四是与实施例一中的方法所对应的装置， 所述装置包括：
第一路径分配模块 1601 , 用于给上波信号组分配传输路径， 每个上波 信号组包括至少一个传输路径相同的上波信号。
第一资源选取模块 1602 , 用于在所述传输路径上选取一个匹配频谱资 源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有 上波信号的频谱宽度的和。
带宽缩小模块 1603 , 用于缩小与所述匹配频谱资源相邻的至少一个直 通信号的滤波带宽。
第一频谱分配模块 1604, 用于给所述上波信号组分配所述匹配频谱资 源， 使得所述上波信号组与缩小滤波带宽的直通信号紧邻。 实施例五
图 17为本发明一种降低串扰代价的装置实施例五结构示意图， 实施例 五是与实施例二中的方法所对应的装置， 所述装置包括：
第一分组模块 1701 ,用于将每个上波信号分为一个上波信号组； 或者， 用于将传输路径相同的上波信号分为一个上波信号组。
第一路径分配模块 1601 , 用于给上波信号组分配传输路径， 每个上波 信号组包括至少一个传输路径相同的上波信号。
第一资源选取模块 1602 , 用于在所述传输路径上选取一个匹配频谱资 源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有 上波信号的频谱宽度的和。 所述第一资源选取模块 1602包括：
查找单元 1702 , 用于在所述传输路径上查找与所述上波信号组传输路 径相同的直通信号；
选取单元 1703 , 用于选取一个与直通信号相邻的匹配频谱资源。
带宽缩小模块 1603 , 用于缩小与所述匹配频谱资源相邻的至少一个直 通信号的滤波带宽。
则所述带宽缩小模块 1603包括：
缩小单元 1704, 用于缩小与所述上波信号组传输路径相同的直通信号 的滤波带宽。
第一频谱分配模块 1604, 用于给所述上波信号组分配所述匹配频谱资 源， 使得所述上波信号组与缩小滤波带宽的直通信号紧邻。
当所述上波信号组包括两个以及两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小的上波信号作为低串扰敏感度信 号， 所述第一频谱分配模块 1604包括：
第一分配单元 1705 , 用于将所述匹配频谱资源的串扰区域分配给所述 上波信号组中的低串扰敏感度信号， 将所述匹配频偏资源的非串扰区域分 配给所述上波信号组中的其他上波信号。
可选的， 当所述上波信号包括两个传输路径相同的上波信号， 将所述 上波信号组中受串扰代价影响最小的一个上波信号作为低串扰敏感度信 号， 所述第一分配单元 1705包括：
第一分配子单元， 用于将所述匹配频谱资源中与直通信号紧邻的区域 分配给所述低串扰敏感度信号， 使得所述低串扰敏感度信号与所述直通信 号紧邻；
第二分配子单元， 用于将所述匹配频谱资源中与所述低串扰敏感度信 号紧邻的区域分配给另一个上波信号， 使得所述另一个上波信号与所述低 串扰敏感度信号紧邻。
可选的， 所述上波信号组包括两个以上传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的两个上波信号作为低串扰敏感度 信号， 所述第一分配单元 1705包括： 排序子单元， 用于对所述上波信号组中的上波信号排序， 将两个低串 扰敏感度信号排列在两端， 将其他的上波信号排列在中间；
第三分配子单元， 用于将与直通信号相邻的任意一个所述匹配频谱资 源分配给排列后的上波信号组， 使得所述排列后的上波信号组与所述直通 信号紧邻。 实施例六
图 18为本发明一种降低串扰代价的装置实施例六结构示意图， 实施例 六是与实施例三中的方法所对应的装置， 所述装置包括：
第二路径分配模块 1801 , 用于给上波信号组分配传输路径， 每个上波 信号组包括至少两个传输路径相同的上波信号， 将所述上波信号组中受串 扰代价影响最小的上波信号作为低串扰敏感度信号。
第二资源选取模块 1802 , 用于在所述传输路径上选取一个匹配频谱资 源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有 上波信号的频谱宽度的和。
可选的， 所述上波信号包括两个传输路径相同的上波信号， 将所述上 波信号组中受串扰代价影响最小的一个上波信号作为低串扰敏感度信号， 所述第二频谱分配模块 1802包括：
第二分配单元， 用于将所述匹配频谱资源中与直通信号紧邻的区域分 配给所述低串扰敏感度信号， 使得所述低串扰敏感度信号与所述直通信号 紧邻；
第三分配单元， 用于将所述匹配频谱资源中与所述低串扰敏感度信号 紧邻的区域分配给另一个上波信号， 使得所述另一个上波信号与所述低串 扰敏感度信号紧邻。
可选的， 所述上波信号组包括两个以上传输路径相同的上波信号， 将 所述上波信号组中受串扰代价影响最小的两个上波信号作为低串扰敏感度 信号， 所述第二频谱分配模块 1802包括：
排序单元， 用于对所述上波信号组中的上波信号排序， 将两个低串扰 敏感度信号排列在两端，将所述上波信号组中其他的上波信号排列在中间； 第四分配单元， 用于将与直通信号相邻的任意一个所述匹配频谱资源 分配给排列后的上波信号组， 使得所述排列后的上波信号组与所述直通信 号紧邻。
第二频谱分配模块 1803 , 用于将所述匹配频谱资源的串扰区域分配给 所述上波信号组中的低串扰敏感度信号， 将所述匹配频谱资源的非串扰区 域分配给所述上波信号组中的其他上波信号。
可选的， 所述装置还包括：
第二分组模块， 用于将每个上波信号分为一个上波信号组； 或者， 将 传输路径相同的上波信号分为一个上波信号组。 实施例七
图 19为本发明一种降低串扰代价的装置实施例七结构示意图，所述装 置包括第一存储器 1901和第一处理器 1902 , 所述第一存储器 1901用于存 储指令， 所述第一处理器 1902用于调取指令， 所述指令包括：
给上波信号组分配传输路径， 每个上波信号组包括至少一个传输路径 相同的上波信号；
在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续 的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 所述在所述传输路径上选取一个匹配频谱资源包括：
在所述传输路径上查找与所述上波信号组传输路径相同的直通信号； 选取一个与所述直通信号相邻的匹配频谱资源；
则所述缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽 包括：
缩小与所述上波信号组传输路径相同的直通信号的滤波带宽； 给所述上波信号组分配所述匹配频谱资源， 使得所述上波信号组与缩 小滤波带宽的直通信号紧邻。
所述上波信号组包括两个以及两个以上传输路径相同的上波信号，，将 所述上波信号组中受串扰代价影响最小的上波信号作为低串扰敏感度信 号， 所述给所述上波信号组分配所述匹配频谱资源包括： 将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的 其他上波信号。
所述上波信号包括两个传输路径相同的上波信号， 将所述上波信号组 中受串扰代价影响最小的一个上波信号作为低串扰敏感度信号， 所述将所 述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏感度信 号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的其他上 波信号包括：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
所述上波信号组包括两个以上传输路径相同的上波信号， 将所述上波 信号组中受串扰代价影响最小的两个上波信号作为低串扰敏感度信号， 所 述将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏感 度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的其 他上波信号包括：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
所述将其他的上波信号排列在中间包括：
将其他的上波信号按照调制阶数由高到低的顺序从中间向两边依次排 歹I。
所述缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽包 括：
通过波长选择开关缩小与所述匹配频谱资源相邻的至少一个直通信号 的滤波带宽。
所述给上波信号组分配传输路径前还包括： 将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。 实施例八
图 20为本发明一种降低串扰代价的装置实施例七结构示意图，所述装 置包括第一存储器 2001和第一处理器 2002 , 所述第一存储器 2001用于存 储指令， 所述第一处理器 2002用于调取指令， 所述指令包括：
给上波信号组分配传输路径， 所述上波信号组包括至少两个传输路径 相同的上波信号， 将所述上波信号组中受串扰代价影响最小的上波信号作 为低串扰敏感度信号；
在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续 的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频谱资源的非串扰区域分配给所述上波信号组中的 其他上波信号。
所述上波信号包括两个传输路径相同的上波信号， 将所述上波信号组 中受串扰代价影响最小的一个上波信号作为低串扰敏感度信号， 所述将所 述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏感度信 号， 将所述匹配频谱资源的非串扰区域分配给所述上波信号组中的其他上 波信号包括：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
所述上波信号组包括两个以上传输路径相同的上波信号， 将所述上波 信号组中受串扰代价影响最小的两个上波信号作为低串扰敏感度信号， 所 述将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏感 度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的其 他上波信号包括：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将所述上波信号组中其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
可选的， 所述给上波信号组分配传输路径前还执行指令：
将每个上波信号分为一个上波信号组； 或者， 将传输路径相同的上波 信号分为一个上波信号组。 本发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权 利要求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在 内。

Claims

权 利 要 求
1、 一种降低串扰代价的方法， 其特征在于， 所述方法包括： 给上波信号组分配传输路径， 每个上波信号组包括至少一个传输路径 相同的上波信号；
在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续 的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽； 给所述上波信号组分配所述匹配频谱资源， 使得所述上波信号组与缩 小滤波带宽的直通信号紧邻。
2、 根据权利要求 1所述的方法， 其特征在于， 所述在所述传输路径上 选取一个匹配频谱资源包括：
在所述传输路径上查找与所述上波信号组传输路径相同的直通信号； 选取一个与所述直通信号相邻的匹配频谱资源；
则所述缩小与所述匹配频谱资源相邻的至少一个直通信号的滤波带宽 包括：
缩小与所述上波信号组传输路径相同的直通信号的滤波带宽。
3、 根据权利要求 1所述的方法， 其特征在于， 所述上波信号组包括两 个以及两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代 价影响最小的上波信号作为低串扰敏感度信号， 所述给所述上波信号组分 配所述匹配频谱资源包括：
将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频偏资源的非串扰区域分配给所述上波信号组中的 其他上波信号。
4、 根据权利要求 3所述的方法， 其特征在于， 所述上波信号包括两个 传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小的一 个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源的串扰区域 分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频偏资源的非 串扰区域分配给所述上波信号组中的其他上波信号包括：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
5、 根据权利要求 3所述的方法， 其特征在于， 所述上波信号组包括两 个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最 小的两个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源的串 扰区域分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频偏资 源的非串扰区域分配给所述上波信号组中的其他上波信号包括：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
6、 根据权利要求 5所述的方法， 其特征在于， 所述将其他的上波信号 排列在中间包括：
将其他的上波信号按照调制阶数由高到低的顺序从中间向两边依次排 列。
7、 根据权利要求 1-6任意一项所述的方法， 其特征在于， 所述缩小与 所述匹配频谱资源相邻的至少一个直通信号的滤波带宽包括：
通过波长选择开关缩小与所述匹配频谱资源相邻的至少一个直通信号 的滤波带宽。
8、 根据权利要求 1-6任意一项所述的方法， 其特征在于， 所述给上波 信号组分配传输路径前还包括：
将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。
9、 一种降低串扰代价的方法， 其特征在于， 所述方法包括： 给上波信号组分配传输路径， 所述上波信号组包括至少两个传输路径 相同的上波信号， 将所述上波信号组中受串扰代价影响最小的上波信号作 为低串扰敏感度信号；
在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续 的并且频谱宽度大于所述上波信号组中所有上波信号的频谱宽度的和； 将所述匹配频谱资源的串扰区域分配给所述上波信号组中的低串扰敏 感度信号， 将所述匹配频谱资源的非串扰区域分配给所述上波信号组中的 其他上波信号。
10、 根据权利要求 9所述的方法， 其特征在于， 所述上波信号包括两 个传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小的 一个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源的串扰区 域分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频谱资源的 非串扰区域分配给所述上波信号组中的其他上波信号包括：
将所述匹配频谱资源中与直通信号紧邻的区域分配给所述低串扰敏感 度信号， 使得所述低串扰敏感度信号与所述直通信号紧邻；
将所述匹配频谱资源中与所述低串扰敏感度信号紧邻的区域分配给另 一个上波信号， 使得所述另一个上波信号与所述低串扰敏感度信号紧邻。
11、 根据权利要求 9所述的方法， 其特征在于， 所述上波信号组包括 两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响 最小的两个上波信号作为低串扰敏感度信号， 所述将所述匹配频谱资源的 串扰区域分配给所述上波信号组中的低串扰敏感度信号， 将所述匹配频偏 资源的非串扰区域分配给所述上波信号组中的其他上波信号包括：
对所述上波信号组中的上波信号排序， 将两个低串扰敏感度信号排列 在两端， 将所述上波信号组中其他的上波信号排列在中间；
将与直通信号相邻的任意一个所述匹配频谱资源分配给排列后的上波 信号组， 使得所述排列后的上波信号组与所述直通信号紧邻。
12、 根据权利要求 9-11任意一项所述的方法， 其特征在于， 所述给上 波信号组分配传输路径前还包括：
将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。
13、 一种降低串扰代价的装置， 其特征在于， 所述装置包括： 第一路径分配模块， 用于给上波信号组分配传输路径， 每个上波信号 组包括至少一个传输路径相同的上波信号；
第一资源选取模块， 用于在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有上波 信号的频谱宽度的和；
带宽缩小模块， 用于缩小与所述匹配频谱资源相邻的至少一个直通信 号的滤波带宽；
第一频谱分配模块， 用于给所述上波信号组分配所述匹配频谱资源， 使得所述上波信号组与缩小滤波带宽的直通信号紧邻。
14、 根据权利要求 13所述的装置， 其特征在于， 所述第一资源选取模 块包括：
查找单元， 用于在所述传输路径上查找与所述上波信号组传输路径相 同的直通信号； 选取单元， 用于选取一个与直通信号相邻的匹配频谱资源； 则所述带宽缩小模块包括：
缩小单元， 用于缩小与所述上波信号组传输路径相同的直通信号的滤 波带宽。
15、 根据权利要求 13所述的装置， 其特征在于， 所述上波信号组包括 两个以及两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰 代价影响最小的上波信号作为低串扰敏感度信号， 所述第一频谱分配模块 包括：
第一分配单元， 用于将所述匹配频谱资源的串扰区域分配给所述上波 信号组中的低串扰敏感度信号， 将所述匹配频偏资源的非串扰区域分配给 所述上波信号组中的其他上波信号。
16、 根据权利要求 15所述的装置， 其特征在于， 所述上波信号包括两 个传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小的 一个上波信号作为低串扰敏感度信号， 所述第一分配单元包括：
第一分配子单元， 用于将所述匹配频谱资源中与直通信号紧邻的区域 分配给所述低串扰敏感度信号， 使得所述低串扰敏感度信号与所述直通信 号紧邻；
第二分配子单元， 用于将所述匹配频谱资源中与所述低串扰敏感度信 号紧邻的区域分配给另一个上波信号， 使得所述另一个上波信号与所述低 串扰敏感度信号紧邻。
17、 根据权利要求 15所述的装置， 其特征在于， 所述上波信号组包括 两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响 最小的两个上波信号作为低串扰敏感度信号， 所述第一分配单元包括： 排序子单元， 用于对所述上波信号组中的上波信号排序， 将两个低串 扰敏感度信号排列在两端， 将其他的上波信号排列在中间； 第三分配子单元， 用于将与直通信号相邻的任意一个所述匹配频谱资 源分配给排列后的上波信号组， 使得所述排列后的上波信号组与所述直通 信号紧邻。
18、 根据权利要求 13-17任意一项所述的装置， 其特征在于， 所述装 置还包括：
第一分组模块， 用于将每个上波信号分为一个上波信号组；
或者，
用于将传输路径相同的上波信号分为一个上波信号组。
19、 一种降低串扰代价的装置， 其特征在于， 所述装置包括： 第二路径分配模块， 用于给上波信号组分配传输路径， 所述上波信号 组包括至少两个传输路径相同的上波信号， 将所述上波信号组中受串扰代 价影响最小的上波信号作为低串扰敏感度信号；
第二资源选取模块， 用于在所述传输路径上选取一个匹配频谱资源， 所述匹配频谱资源为连续的并且频谱宽度大于所述上波信号组中所有上波 信号的频谱宽度的和；
第二频谱分配模块， 用于将所述匹配频谱资源的串扰区域分配给所述 上波信号组中的低串扰敏感度信号， 将所述匹配频谱资源的非串扰区域分 配给所述上波信号组中的其他上波信号。
20、 根据权利要求 19所述的装置， 其特征在于， 所述上波信号包括两 个传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响最小的 一个上波信号作为低串扰敏感度信号， 所述第二频谱分配模块包括：
第二分配单元， 用于将所述匹配频谱资源中与直通信号紧邻的区域分 配给所述低串扰敏感度信号， 使得所述低串扰敏感度信号与所述直通信号 紧邻；
第三分配单元， 用于将所述匹配频谱资源中与所述低串扰敏感度信号 紧邻的区域分配给另一个上波信号， 使得所述另一个上波信号与所述低串 扰敏感度信号紧邻。
21、 根据权利要求 19所述的装置， 其特征在于， 所述上波信号组包括 两个以上传输路径相同的上波信号， 将所述上波信号组中受串扰代价影响 最小的两个上波信号作为低串扰敏感度信号，所述第二频谱分配模块包括： 排序单元， 用于对所述上波信号组中的上波信号排序， 将两个低串扰 敏感度信号排列在两端，将所述上波信号组中其他的上波信号排列在中间； 第四分配单元， 用于将与直通信号相邻的任意一个所述匹配频谱资源 分配给排列后的上波信号组， 使得所述排列后的上波信号组与所述直通信 号紧邻。
22、 根据权利要求 19-21所述的装置， 其特征在于， 所述装置还包括： 第二分组模块， 用于将每个上波信号分为一个上波信号组；
或者，
将传输路径相同的上波信号分为一个上波信号组。
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