WO2021254281A1 - 光信号处理方法、控制单元、光发射单元及存储介质 - Google Patents

光信号处理方法、控制单元、光发射单元及存储介质 Download PDF

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Publication number
WO2021254281A1
WO2021254281A1 PCT/CN2021/099816 CN2021099816W WO2021254281A1 WO 2021254281 A1 WO2021254281 A1 WO 2021254281A1 CN 2021099816 W CN2021099816 W CN 2021099816W WO 2021254281 A1 WO2021254281 A1 WO 2021254281A1
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Prior art keywords
optical
optical signal
processing method
signal processing
osnr
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PCT/CN2021/099816
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English (en)
French (fr)
Inventor
陈伟章
赵志勇
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中兴通讯股份有限公司
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Priority to EP21826816.7A priority Critical patent/EP4092930A4/en
Priority to KR1020227028840A priority patent/KR102659906B1/ko
Priority to US17/904,730 priority patent/US11876563B2/en
Publication of WO2021254281A1 publication Critical patent/WO2021254281A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07953—Monitoring or measuring OSNR, BER or Q
    • 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0773—Network aspects, e.g. central monitoring of transmission parameters
    • 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0779—Monitoring line transmitter or line receiver equipment
    • 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0799—Monitoring line transmitter or line receiver equipment
    • 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
    • H04B10/2589—Bidirectional transmission
    • 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
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/548—Phase or frequency modulation
    • H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]

Definitions

  • the embodiments of the present application relate to, but are not limited to, the field of optical communications, and in particular to an optical signal processing method, a control unit, a light emitting unit, and a computer-readable storage medium.
  • Optical Transport Network (OTN) system is an important part of optical fiber communication.
  • OTN Optical Transport Network
  • the application of over 100G optical network based on coherent optical detection is becoming more and more extensive.
  • Over 100G optical networks make extensive use of high-level modulation technologies such as Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM), which makes the baud rate of single-carrier transmission signals higher Therefore, the ultra-100G optical network has higher requirements for optical fiber links, which makes the engineering design of the ultra-100G optical network require complex design and verification, and when the optical fiber routing or optical path indicators change, even When the optical signal reaches the transmission performance degradation threshold, the OTN system can only passively generate system alarms and cannot adjust the transmission performance of the optical signal.
  • QPSK Quadrature Phase Shift Keying
  • QAM Quadrature Amplitude Modulation
  • the embodiments of the present application provide an optical signal processing method, a control unit, a light emitting unit, and a computer-readable storage medium.
  • an embodiment of the present application provides an optical signal processing method, which is applied to a control unit, and includes: obtaining an OSNR value from an optical receiving unit; obtaining a spectrum shaping adjustment parameter according to the OSNR value; The spectral shaping adjustment parameter is used to adjust the filtering parameter of the shaping filter of the light emitting unit, so that the light emitting unit uses the adjusted shaping filter to adjust the spectral waveform of the optical signal.
  • an embodiment of the present application provides an optical signal processing method, applied to a light emitting unit, and includes: receiving a spectrum shaping adjustment parameter from a control unit, and the control unit uses the control unit according to the adjustment parameter from the light receiving unit.
  • the OSNR value is obtained; the filter parameter of the shaping filter is adjusted according to the spectral shaping adjustment parameter; the spectral waveform of the optical signal is adjusted by the adjusted shaping filter.
  • an embodiment of the present application also provides a control unit, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor executes the computer program as described above.
  • the optical signal processing method of the first aspect is not limited to: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor executes the computer program as described above.
  • an embodiment of the present application also provides a light emitting unit, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor.
  • the processor executes the computer program when the computer program is executed.
  • the optical signal processing method of the second aspect as described above.
  • an embodiment of the present application also provides a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are used to execute the optical signal processing method as described above.
  • FIG. 1 is a schematic diagram of an OTN system for executing an optical signal processing method provided by an embodiment of the present application
  • Fig. 2 is a flowchart of an optical signal processing method provided by an embodiment of the present application
  • FIG. 3 is a flowchart of obtaining spectral shaping adjustment parameters in an optical signal processing method provided by another embodiment of the present application.
  • FIG. 5 is a flowchart of an optical signal processing method provided by another embodiment of the present application.
  • FIG. 6 is a flowchart of adjusting filter parameters in an optical signal processing method provided by another embodiment of the present application.
  • FIG. 7 is a flowchart of adjusting the spectral waveform in the optical signal processing method provided by another embodiment of the present application.
  • FIG. 9 is a structural diagram of an OTN system applying an optical signal processing method according to another embodiment of the present application.
  • FIG. 10A is a spectrum waveform diagram of an optical signal before filtering according to another embodiment of the present application.
  • FIG. 10B is a spectral waveform diagram of an optical signal after filtering provided by another embodiment of the present application.
  • FIG. 11 is a structural diagram of an OTN system applying an optical signal processing method according to another embodiment of the present application.
  • the embodiments of the application provide an optical signal processing method, device, and computer-readable storage medium to obtain the OSNR value from the optical receiving unit; according to the OSNR value, the optical transmitting unit is controlled to adjust the filtering parameters of the shaping filter to make the optical signal
  • the transmitting unit adjusts the spectral waveform of the optical signal by using the adjusted shaping filter.
  • the transmitting unit can be controlled to adjust the filtering parameters of the shaping filter according to the OSNR value of the optical receiving unit, thereby adjusting the spectral waveform of the optical signal, achieving the optimization of the pass-through cost and reducing the ONSR cost of the optical channel. Improve the transmission performance of the OTN system.
  • FIG. 1 is a schematic diagram of an OTN system for executing an optical signal processing method provided by an embodiment of the present application.
  • the OTN system includes a light emitting unit 110, a light receiving unit 120, and a control unit 130, wherein the light emitting unit 110 is communicatively connected with the light receiving unit 120, and the light emitting unit 110 is configured to transfer the modulated
  • the optical signal is sent to the optical receiving unit 120 through the optical channel;
  • the control unit 130 is respectively communicatively connected with the optical transmitting unit 110 and the optical receiving unit 120, that is, the control unit 130 can receive the information from the optical receiving unit 120 and the optical transmitting unit 110, and can also transmit the information to the optical
  • the receiving unit 120 and the optical transmitting unit 110 send control information, and the specific communication channel can be selected according to actual requirements, such as an out-of-band optical wavelength label channel or an optical monitoring channel, which can realize information transmission.
  • control unit 130 may be a device such as a system control platform or a server, which can realize data monitoring and processing, which is not specifically limited in this embodiment.
  • OTN system with the control unit can be applied to various optical transmission network systems, for example, can be applied to 100G optical transmission networks, and can also be applied to over 100G optical transmission networks, which is not specifically limited in this embodiment.
  • FIG. 1 do not constitute a limitation on the embodiments of the present application, and may include more or less components than those shown in the figure, or a combination of certain components, or different components. Component arrangement.
  • the optical transmitting unit 110 and the optical receiving unit 120 in the embodiment of the present application may be components provided in an optical transform unit (OTU), or may be independent components, which is not the case in this embodiment. Make specific restrictions. It is worth noting that if the OTN system includes multiple groups of parallel optical channels, the optical signal processing method of the present application can be executed independently for the optical transmitting unit 110 and the optical receiving unit 120 of each optical channel through the control unit 130, or for each optical channel. Each OTU performs unified adjustment, which is not specifically limited in this embodiment.
  • OTU optical transform unit
  • the light emitting unit 110 may include a light emitting end 111 and a compensation controller 112, wherein the light emitting end 111 is configured to emit a modulated and filtered optical signal, and the compensation controller 112 is configured to follow the control unit 130
  • the sent spectral waveform adjustment parameters adjust the filtering parameters of the shaping filter.
  • the compensation controller 112 can be an independent functional component, for example, a single-chip microcomputer or a field programmable logic gate array (Field Programmable Gate Array, PFGA) chip. It is a software function module in the light emitting unit 110, which is not specifically limited in this embodiment.
  • the optical receiving unit 120 may include an optical receiving terminal 121 and an OSNR detecting unit 122.
  • the optical receiving terminal 121 is configured to receive the optical signal from the optical transmitting terminal 111, and the OSNR detecting unit 122 may receive at the optical receiving terminal 121. Obtain the OSNR value of the optical channel in the case of the optical signal.
  • the OSNR detection unit 122 may be an independent functional hardware or a software function module of the light receiving unit 120, which is not specifically limited in this embodiment.
  • FIG. 2 is a flowchart of an optical signal processing method provided by an embodiment of the present application.
  • the optical signal processing method includes but is not limited to step S100, step S200, and step S300.
  • Step S100 Obtain the OSNR value from the light receiving unit.
  • the OSNR value can be obtained in real time, or it can be obtained by setting a certain period of time, or it can be obtained manually, and it can be selected according to actual needs.
  • a real-time acquisition of OSNR value can be used to reflect in real time.
  • the current transmission performance of the optical channel can be adjusted in time when the transmission performance of the optical channel decreases to ensure the transmission performance of the OTN system. It should be noted that since there are usually multiple OTUs in the OTN system, and the number of optical receiving units is large, the OSNR value of each optical receiving unit can be obtained in a scanning manner, and this embodiment is not limited.
  • the OSNR value can be directly obtained by setting the OSNR detection unit in the optical receiving unit, or the parameter used to calculate the OSNR value can be sent to the control unit for calculation.
  • the parameter can be the signal power of the optical channel. , Equivalent noise bandwidth, noise power, reference optical bandwidth, etc., this embodiment does not make many restrictions. It is worth noting that after the optical signal enters the optical receiving unit, it needs to be processed by coherent optical reception and dispersion compensation, and finally the data service signal is demodulated. The acquisition of the OSNR value requires parameters such as signal power, which can be used to demodulate the data service signal. Obtain the OSNR value after the signal to ensure that the obtained OSNR value can accurately reflect the current transmission quality.
  • step S200 the spectrum shaping adjustment parameter is obtained according to the OSNR value.
  • the shaping filter may be a pulse shaping filter or other shaping filters, and it is sufficient to perform digital filtering on the spectral waveform of the optical signal, which is not specifically limited in this embodiment. It is worth noting that spectral shaping can be achieved by adjusting the tap coefficient and roll-off factor of the shaping filter, that is, to pre-emphasize the spectral waveform of the output optical signal, thereby adjusting the shape of the spectral waveform and compensating for the OSNR cost loss of the optical fiber link .
  • Step S300 Send the spectral shaping adjustment parameters to the light emitting unit to adjust the filtering parameters of the shaping filter of the light emitting unit, so that the light emitting unit adjusts the spectral waveform of the optical signal by using the adjusted shaping filter.
  • the ultra-100G optical network uses a large number of high-level modulation technologies such as QPSK, 8QAM, 16QAM, 32QAM, and 64QAM to make the baud rate of the single-carrier transmission signal higher.
  • high-level modulation technologies such as QPSK, 8QAM, 16QAM, 32QAM, and 64QAM to make the baud rate of the single-carrier transmission signal higher.
  • the transmission performance of the high-order modulation OTN system is related to the non-relay transmission distance. In order to increase the non-relay transmission distance, it can be achieved by reducing the OSNR cost of the optical channel.
  • the ONSR cost of the optical channel is mainly determined by the service optical signal. It is composed of the penetrating cost and the nonlinear distortion cost. Adjusting the spectral waveform of the optical signal can achieve the effect of spectral shaping, thereby reducing the penetrating cost of the optical channel and improving the transmission performance.
  • step S200 includes but is not limited to the following steps:
  • Step S210 when the OSNR value is less than the preset threshold, obtain the optical signal modulation mode of the OTN system
  • Step S220 Acquire the spectrum shaping adjustment parameter from the preset look-up table according to the optical signal modulation mode and the OSNR value.
  • the preset threshold may be any value.
  • the transmission performance degradation threshold of the OTN system is used as the preset threshold.
  • the OSNR value is less than the transmission performance degradation threshold, the optical signal cannot be transmitted normally. Based on this, it is necessary to Adjust the filter parameters in time to achieve real-time adjustment of the spectrum waveform, improve the transmission performance of the optical signal in the optical channel, and ensure the normal transmission and reception of the OTN system.
  • the preset threshold can also be selected to be greater than the transmission performance degradation threshold to make OTN The system is maintained in a normal transmission state, and the specific value can be selected according to actual needs.
  • the spectral shaping adjustment parameter may be an adjustment amount or a new filter parameter used to replace the current filter parameter, and the specific type may be selected according to actual needs. For example, if the spectral shaping adjustment parameter is the adjustment value, the adjusted filtering parameter is obtained by adding the current filtering parameter and the spectral shaping adjustment parameter, and the shaping filter filters the optical signal according to the adjusted filtering parameter; If the spectral shaping adjustment parameter is a new filter parameter, the light emitting unit replaces the currently used filter parameter with the new filter parameter, and adjusts the spectral waveform of the optical signal with the new filter parameter. It is worth noting that when the spectral shaping adjustment parameter is an adjustment, the adjustment can be a fixed value or a variable, such as a function related to the time domain. The specific adjustment type can be selected according to actual needs. Just adjust the filter parameters.
  • the optical signal modulation mode can be obtained through route analysis, for example, the control unit obtains the current transmission fiber type, optical link status, and optical emission and optical reception performance indicators for determination. It should be noted that the optical signal modulation mode can be any type of high-order modulation mode.
  • the phase modulator (PM) used in the ultra-100G optical network can be PM-8QAM, PM-16QAM, or PM-QPSK. Wait.
  • the OTN system is in different optical signal modulation modes, the working state of the optical receiving unit is different, and the OSNR optimization effect that can be achieved by adjusting the filter parameters is different, so when the optical signal modulation mode is obtained by the OSNR value to obtain the spectral shaping adjustment parameters
  • the OSNR value of the optical receiving unit is the same and the service rate is the same as 200G.
  • the spectrum shaping adjustment parameters obtained in the table are different from each other, so that the filter parameters can be adapted to the corresponding optical modulation modes after adjustment, so as to achieve better transmission performance.
  • the corresponding spectrum shaping adjustment parameters in each optical modulation mode are based on The actual OTN system requirements can be selected.
  • obtaining the spectral shaping adjustment parameters according to the OSNR value and the optical modulation mode may be matched through a look-up table, or may be calculated by a preset formula. It should be noted that if the spectral shaping parameters are obtained through a pre-set lookup table, the specific value or variable corresponding to the OSNR value can be set in the lookup table, and the value or variable can be used as the spectrum shaping adjustment parameter, or it can be in Set the calculation formula corresponding to the OSNR value in the lookup table, and select it according to actual needs.
  • step S200 includes but is not limited to the following steps:
  • step S230 when the OSNR value is greater than or equal to the preset threshold, the light emitting unit is controlled to maintain the current filtering parameters of the shaping filter, so that the light emitting unit maintains the current spectral waveform of the optical signal.
  • the OSNR value is a performance indicator of optical channel transmission quality
  • the preset threshold is the transmission performance degradation threshold of the OTN system
  • the OSNR value is greater than or equal to the preset threshold
  • the optical channel transmission performance of the OTN system To meet the transmission requirements, the current filtering parameters of the shaping filter can be maintained, and the filtering parameters can be further adjusted, so that the OSNR value can meet higher optical transmission requirements.
  • the specific adjustment method can be selected according to actual needs.
  • the shaping filter in order to maintain the current filtering parameters of the shaping filter, it can either send an instruction to maintain the filter parameters to the light emitting unit, or not send any instructions to the light emitting unit, when the light emitting unit does not receive the instruction. No corresponding adjustments will be made to maintain the current filtering parameters of the shaping filter.
  • the OSNR value includes the OSNR tolerance of the optical receiving unit, the OSNR cost of the optical channel, and the OSNR redundancy of the OTN system.
  • the OSNR value may include any value type related to OSNR, such as the OSNR tolerance value of the optical receiving unit, the OSNR cost of the optical channel, and the OSNR redundancy of the OTN system.
  • the specific value type is selected according to actual needs. That's it.
  • the preset threshold can be calculated by any formula.
  • the OSNR value includes the OSNR tolerance of the optical receiving unit, the OSNR cost of the optical channel, and the OSNR redundancy of the OTN system
  • ⁇ is the preset check offset, that is, the preset threshold when X 1 , X 2 and X 3 are all 0. Based on this, ⁇ can be the degradation of the transmission performance of the OTN system
  • the threshold the specific value can be selected according to actual needs.
  • the OSNR value and the spectral shaping adjustment parameter may be transmitted through the out-of-band optical wavelength label channel, or may be transmitted through the optical monitoring channel.
  • the OSNR value can be transmitted through any channel connected between the control unit and the OTU.
  • the out-of-band optical wavelength label channel is directly connected between the control unit and the OTU, and the optical receiving unit is set in the OTU, so The OSNR value can be sent from the optical receiving unit to the control unit through this channel;
  • the OTN system includes several optical monitoring platforms, which are set to obtain the data of the optical channel to ensure the normal operation of the OTN system, so OTU, optical monitoring Communication between the platform and the control unit can be set to send the OSNR value.
  • other types of channels can also be used to obtain the OSNR value, which can be selected according to actual needs.
  • FIG. 5 is a flowchart of an optical signal processing method provided by an embodiment of the present application.
  • the optical signal processing method includes but is not limited to step S1000, step S2000, and step S3000.
  • Step S1000 receiving the spectrum shaping adjustment parameter from the control unit, and the spectrum shaping adjustment parameter is obtained by the control unit according to the OSNR value from the light receiving unit.
  • the spectrum shaping adjustment parameter can be obtained by the control unit of the OTN system according to the OSNR value of the optical receiving unit.
  • the control unit of the OTN system according to the OSNR value of the optical receiving unit.
  • Step S2000 Adjust the filtering parameters of the shaping filter according to the spectral shaping adjustment parameters.
  • the compensation controller may adjust the filter parameter in real time, so that the spectrum waveform of the optical signal of the optical transmitting unit is adjusted in real time, ensuring that the transmission performance of the OTN system meets the requirements. It should be noted.
  • step S3000 the spectral waveform of the optical signal is adjusted by using the adjusted shaping filter.
  • the shaping filter can be any type of shaping filter, such as a pulse shaping filter. Filtering the spectral waveform of the optical signal through the pulse shaping filter can achieve the effect of spectral shaping and reduce the pass-through cost of the optical channel. , Thereby reducing the OSNR cost of the optical channel and increasing the non-relay transmission distance.
  • optical signal processing method of this embodiment is roughly the same as that of the embodiment shown in FIG. 2.
  • the main difference is that the execution subject of the optical signal processing method of the embodiment shown in FIG.
  • the execution body of the optical signal processing method of the embodiment is the light emitting unit.
  • similar principles will not be repeated in the following.
  • step S2000 includes but is not limited to the following steps:
  • Step S2100 Adjust the roll-off factor and tap coefficient of the shaping filter according to the spectrum shaping adjustment parameter.
  • the roll-off factor and the tap coefficient can be adjusted simultaneously through the spectral shaping adjustment parameters, or only one of the parameters can be adjusted and selected according to actual requirements, and the adjustment can meet the transmission requirements.
  • step S3000 includes but is not limited to the following steps:
  • step S3100 pre-emphasis is performed on the spectral waveform of the optical signal according to the adjusted roll-off factor and tap coefficient.
  • the spectral waveform of the optical signal can be changed, and any shaping effect can be achieved, for example, the effect of the pre-emphasis processing is equivalent to the spectral characteristics, thereby compensating the fiber Link OSNR cost loss.
  • the spectral shaping adjustment parameters can be transmitted through the out-of-band optical wavelength label channel, or through the optical monitoring channel.
  • step S2000 includes but is not limited to the following steps:
  • step S2200 when the spectrum shaping adjustment parameter is not received from the control unit, the current filtering parameter of the shaping filter is maintained, so that the light emitting unit maintains the current spectrum waveform of the optical signal.
  • the OSNR value of the optical receiving unit when the OSNR value of the optical receiving unit is greater than or equal to the preset threshold, the principle of maintaining the current filtering parameters of the shaping filter is similar to the principle of the embodiment shown in FIG. 4, and will not be repeated here.
  • FIG. 9 is a schematic structural diagram of an OTN system for executing an optical signal processing method according to another embodiment of the present application.
  • the following uses specific examples to illustrate the technical solutions of the embodiments of the present application:
  • the OTN system includes several OTU910s.
  • the OTU910 includes several optical transmitting units 920, several optical receiving units 930, and a compensation controller 940. It also includes a control unit 950, which can pass out-of-band optical wavelength labels.
  • the channel exchanges data with the OTU, the output end of the optical receiving unit 930 is connected to the compensation controller 940, and the optical transmitting unit 920 is bidirectionally connected to the compensation controller 940.
  • the control unit 950 obtains the preset initial filter parameters, and sends the initial filter parameters to the compensation controller 940, and the compensation controller 940 adjusts the integral filter according to the initial filter parameters.
  • the optical signal is filtered and then transmitted to the optical receiving unit 930, and its spectral waveform is shown in Figure 10A; the optical receiving unit 930 performs OSNR detection after receiving the optical signal, and obtains the OSNR value through the out-of-band optical wavelength label channel It is sent to the system controller 950, where the OSNR value includes the OSNR tolerance value of the optical receiving unit, the OSNR cost of the optical channel, and the OSNR redundancy of the OTN system; after receiving the OSNR value, the system controller 950 compares the OSNR value with The preset threshold value is compared. When the OSNR value is greater than or equal to the preset threshold value, the current filter parameters are maintained.
  • the optical signal modulation mode of the OTN system is obtained, and the optical signal modulation mode and OSNR value are set from the preset Obtain the spectrum shaping adjustment parameters from the predetermined lookup table, and send the spectrum shaping adjustment parameters to the compensation controller 940; after receiving the spectrum shaping adjustment parameters, the compensation controller 940 adjusts the roll-off factor of the shaping filter according to the spectrum shaping adjustment parameters And the tap coefficients are adjusted so that the light emitting unit 920 uses the adjusted shaping filter to adjust the spectral waveform of the optical signal.
  • the spectral waveform is shown in FIG. In 10B, the horizontal axis of the coordinate axis is time, and the vertical axis is the frequency of the optical signal.
  • the spectrum shaping adjustment parameters can be obtained according to the OSNR value of the light receiving unit 930, so as to adjust the light emitted by the light emitting unit 920.
  • the spectrum waveform of the signal is adjusted to realize the optical channel compensation, effectively reduce the pass-through cost, compensate the loss of the OSNR cost, and increase the non-relay transmission distance, thereby improving the transmission performance of the OTN system.
  • FIG. 11 provides a schematic structural diagram of an OTN system for performing an optical signal processing method according to another embodiment of the present application.
  • the OTN system in FIG. 11 includes several OTU1110, and OTU1110 includes several optical transmitting units 1120.
  • a number of light receiving units 1130, compensation controller 1140, OSNR detection unit 1150, optical monitoring platform 1160 and control unit 1170 among which, the light emitting unit 1120 and the compensation controller 1140 are bidirectionally connected, the light receiving unit 1130 and the OSNR detection unit 1150 Connected, the optical monitoring platform 1160 is connected to the OTU1110 and can be used to obtain data in the OTU1110 and can send spectrum shaping adjustment parameters to the compensation controller 1140, and the control unit 1170 is in communication connection with the optical monitoring platform 1160.
  • the specific principle of the embodiment shown in Fig. 11 is similar to the principle of the embodiment shown in Fig. 9. The main difference is that the OSNR value of the OTU and the spectral shaping adjustment parameters communicate with the control unit 1170 through the channel of the optical monitoring platform 1160, and the OSNR value
  • the principle and filtering effect of adjusting the parameters of spectral shaping and adjusting the filtering parameters are similar to those in the embodiment shown in FIG. 9 and will not be repeated here.
  • an embodiment of the present application also provides a control unit, which includes a memory, a processor, and a computer program stored on the memory and running on the processor.
  • the processor and the memory can be connected by a bus or in other ways.
  • control unit in this embodiment can form a part of the OTN system in the embodiment shown in FIG. No more details here.
  • the non-transitory software programs and instructions required to implement the optical signal processing method of the foregoing embodiment are stored in the memory.
  • the optical signal processing method applied to the control unit in the foregoing embodiment is executed, for example, The above described method steps S100 to S300 in FIG. 2, method steps S210 to S220 in FIG. 3, and method step S230 in FIG. 4.
  • an embodiment of the present application also provides a light emitting unit, which includes a memory, a processor, and a computer program stored in the memory and running on the processor.
  • the processor and the memory can be connected by a bus or in other ways.
  • the light emitting unit in this embodiment can form part of the OTN system in the embodiment shown in FIG. 1. These embodiments all belong to the same inventive concept, so these embodiments have the same implementation principles and technical effects , No longer detailed here.
  • the non-transitory software programs and instructions required to implement the optical signal processing method of the above embodiment are stored in the memory, and when executed by the processor, the optical signal processing method applied to the light emitting unit in the above embodiment is executed, for example, The above-described method steps S1000 to S3000 in FIG. 5, method S2100 in FIG. 6, method S3100 in FIG. 7, and method S2200 in FIG. 8 are performed.
  • the device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • an embodiment of the present application also provides a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are executed by a processor or a controller, for example, by the aforementioned
  • the execution of a processor in the embodiment of the control unit may cause the above-mentioned processor to execute the optical signal processing method applied to the control unit in the above-mentioned embodiment, for example, to execute the steps S100 to S300 of the method in FIG. 2 described above, as shown in FIG. 3 Steps S210 to S220 in the method and step S230 in the method in FIG.
  • the signal processing method for example, executes the method steps S1000 to S3000 in FIG. 5, the method S2100 in FIG. 6, the method S3100 in FIG. 7, and the method S2200 in FIG. 8 described above.
  • the embodiment of the application includes: obtaining the OSNR value from the optical receiving unit; obtaining the spectrum shaping adjustment parameter according to the OSNR value; sending the spectrum shaping adjustment parameter to the optical emitting unit to adjust the filtering parameter of the shaping filter of the optical emitting unit, So that the light emitting unit uses the adjusted shaping filter to adjust the spectral waveform of the optical signal.
  • the control unit can control the light emitting unit to adjust the filtering parameters of the shaping filter according to the OSNR value from the light receiving unit, so that the light emitting unit can adjust the spectral waveform of the optical signal and improve the transmission of the OTN system performance.
  • computer storage medium includes volatile and non-volatile data implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data).
  • Information such as computer-readable instructions, data structures, program modules, or other data.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other storage technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or Any other medium used to store desired information and that can be accessed by a computer.
  • communication media usually contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery media. .

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Abstract

一种光信号处理方法、控制单元、光发射单元及存储介质。其中，所述光信号处理方法包括：获取来自光接收单元的OSNR值（S100）；根据所述OSNR值获取光谱整形调整参数（S200）；向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数，以使光发射单元利用调整后的所述整形滤波器调整光信号的光谱波形（S300）。

Description

光信号处理方法、控制单元、光发射单元及存储介质
相关申请的交叉引用
本申请基于申请号为202010543111.2、申请日为2020年06月15日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请实施例涉及但不限于光通信领域，尤其涉及一种光信号处理方法、控制单元、光发射单元及计算机可读存储介质。
背景技术
光传送网(Optical Transport Network，OTN)系统是光纤通信的重要组成部分，随着光纤通信技术的发展，基于相干光检测的超100G光网络的应用越来越广泛。超100G光网络大量运用正交相移键控(Quadrature Phase Shift Keying，QPSK)和正交幅度调制技术(Quadrature Amplitude Modulation，QAM)等高阶调制技术，使得单载波传输信号的波特率较高，因此，超100G光网络对光纤链路的要求更高，这使得在进行超100G光网络的工程设计时，需要进行复杂的设计和验算，并且，当光纤路由或光路指标发生变化时，即使光信号达到传输性能劣化阈值，OTN系统往往只能被动产生系统告警，无法对光信号的传输性能作出调整。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种光信号处理方法、控制单元、光发射单元及计算机可读存储介质。
第一方面，本申请实施例提供了一种光信号处理方法，应用于控制单元，包括：获取来自光接收单元的OSNR值；根据所述OSNR值获取光谱整形调整参数；向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数，以使光发射单元利用调整后的所述整形滤波器调整光信 号的光谱波形。
第二方面，本申请实施例提供了一种光信号处理方法，应用于光发射单元，包括：接收来自控制单元的光谱整形调整参数，所述光谱整形调整参数由控制单元根据来自光接收单元的OSNR值而获取；根据所述光谱整形调整参数调整整形滤波器的滤波参数；利用调整后的所述整形滤波器调整光信号的光谱波形。
第三方面，本申请实施例还提供了一种控制单元，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上所述第一方面的光信号处理方法。
第四方面，本申请实施例还提供了一种光发射单元，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上所述第二方面的光信号处理方法。
第五方面，本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行如上所述的光信号处理方法。
本申请的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本申请技术方案的进一步理解，并且构成说明书的一部分，与本申请的实施例一起用于解释本申请的技术方案，并不构成对本申请技术方案的限制。
图1是本申请一个实施例提供的用于执行光信号处理方法的OTN系统的示意图；
图2是本申请一个实施例提供的光信号处理方法的流程图；
图3是本申请另一实施例提供的光信号处理方法中获取光谱整形调整参数的流程图；
图4是本申请另一实施例提供的光信号处理方法中维持当前的滤波参数的流程图；
图5是本申请另一个实施例提供的光信号处理方法的流程图；
图6是本申请另一实施例提供的光信号处理方法中调整滤波参数的流程图；
图7是本申请另一实施例提供的光信号处理方法中调整光谱波形的流程图；
图8是本申请另一实施例提供的光信号处理方法中维持当前的滤波参数的流程图；
图9是本申请另一实施例提供的应用光信号处理方法的OTN系统结构图；
图10A是本申请另一实施例提供的光信号滤波前的光谱波形图；
图10B是本申请另一实施例提供的光信号滤波后的光谱波形图；
图11是本申请另一实施例提供的应用光信号处理方法的OTN系统结构图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，虽然在装置示意图中进行了功能模块划分，在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于装置中的模块划分，或流程图中的顺序执行所示出或描述的步骤。说明书、权利要求书或上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本申请实施例提供了一种光信号处理方法、设备及计算机可读存储介质，获取来自光接收单元的OSNR值；根据所述OSNR值控制光发射单元调整整形滤波器的滤波参数，以使光发射单元利用调整后的所述整形滤波器调整光信号的光谱波形。根据本申请实施例提供的方案，能够根据光接收单元的OSNR值控制发射单元调整整形滤波器的滤波参数，从而调整光信号的光谱波形，实现了穿通代价的优化，降低光通道的ONSR代价，提高OTN系统的传输性能。
下面结合附图，对本申请实施例作进一步阐述。
如图1所示，图1是本申请一个实施例提供的用于执行光信号处理方法的OTN系统的示意图。
在图1的示例中，该OTN系统包括光发射单元110、光接收单元120和控制单元130，其中，光发射单元110与光接收单元120通信连接，光发射单元110被设置成将调制后的光信号通过光通道发送至光接收单元120；控制单 元130分别与光发射单元110和光接收单元120通信连接，即控制单元130能够接收来自光接收单元120和光发射单元110的信息，也可以向光接收单元120和光发射单元110发送控制信息，具体的通信信道根据实际需求选取即可，例如带外光波长标签信道或者光监控信道，能够实现信息传输即可。
本领域技术人员可以理解的是，控制单元130可以是系统控制平台或者服务器等设备，能够实现数据监控和处理即可，本实施例对此并不作具体限定。另外，具有该控制单元的OTN系统可以应用于各种光传输网络系统，例如，可以应用于100G光传输网络，也可以应用于超100G光传输网络，本实施例对此并不作具体限定。
本领域技术人员可以理解的是，图1中示出的OTN系统元并不构成对本申请实施例的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
需要说明的是，本申请实施例的光发射单元110和光接收单元120可以是设置于光转换单元(Optical Transform Unit，OTU)中的部件，也可以是独立的部件，本实施例对此并不作出具体限定。值得注意的是，若OTN系统中包括多组并行的光通道，可以通过控制单元130对每个光通道的光发射单元110和光接收单元120独立执行本申请的光信号处理方法，也可以对每个OTU进行统一的调整，本实施例对此并不作出具体限定。
需要说明的是，光发射单元110中可以包括光发射端111和补偿控制器112，其中，光发射端111被设置成发出调制滤波后的光信号，补偿控制器112被设置成根据控制单元130发送的光谱波形调整参数对整形滤波器的滤波参数进行调整，补偿控制器112可以是独立的功能部件，例如可以为单片机或者现场可编程逻辑门阵列(Field Programmable Gate Array，PFGA)芯片，也可以是光发射单元110中的软件功能模块，本实施例对此并不作出具体限定。
需要说明的是，光接收单元120中可以包括光接收端121和OSNR检测单元122，光接收端121被设置成接收来自光发射端111的光信号，OSNR检测单元122可以在光接收端121接收到光信号的情况下获取光通道的OSNR值。OSNR检测单元122可以是独立的功能性硬件，也可以是光接收单元120的软件功能模块，本实施例对此并不作出具体限定。
基于上述控制单元，下面提出本申请的光信号处理方法的各个实施例。
如图2所示，图2是本申请一个实施例提供的光信号处理方法的流程图，该光信号处理方法包括但不限于有步骤S100、步骤S200和步骤S300。
步骤S100，获取来自光接收单元的OSNR值。
在一实施例中，OSNR值可以是实时获取，也可以是设定一定的时间段定时获取，也可以手动操作获取，根据实际需求选取即可，例如采用实时获取OSNR值的方案，能够实时反映出当前光通道的传输性能，能够在光通道传输性能下降时及时进行调整光发射单元的光谱波形，确保OTN系统的传输性能。需要说明的是，由于OTN系统中通常有多个OTU，光接收单元的数量较多，可以采用扫描的方式获取每个光接收单元的OSNR值，本实施例不多作限制。
在一实施例中，OSNR值可以通过在光接收单元中设置OSNR检测单元直接获取，也可以将用于计算OSNR值的参数发送至控制单元中计算得出，该参数可以是光通道的信号功率、等效噪声带宽、噪声功率和参考光带宽等，本实施例不多作限制。值得注意的是，光信号进入光接收单元后，需要进行相干光接收、色散补偿等处理，最终解调出数据业务信号，而OSNR值的获取需要信号功率等参数，可以在解调出数据业务信号后对OSNR值进行获取，确保所获取的OSNR值能够准确反映出当前的传输质量。
步骤S200，根据OSNR值获取光谱整形调整参数。
在一实施例中，整形滤波器可以是脉冲整形滤波器，也可以是其他整形滤波器，能够对光信号的光谱波形进行数字滤波即可，本实施例并不作具体限定。值得注意的是，可以通过调整整形滤波器的抽头系数和滚降因子实现光谱整形，即对输出的光信号的光谱波形进行预加重，从而调整光谱波形的形状，补偿光纤链路的OSNR代价损失。
步骤S300，向光发射单元发送光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数，以使光发射单元利用调整后的整形滤波器调整光信号的光谱波形。
在一实施例中，超100G光网络大量运用QPSK、8QAM、16QAM、32QAM和64QAM等高阶调制技术，使得单载波传输信号的波特率较高，当光纤路由或光路指标发生变化时，传输性能受到的影响较大，高阶调制OTN系统的传输性能与无中继传输距离相关，为了增加无中继传输距离，可以通过降低光通道的OSNR代价实现，光通道ONSR代价主要由业务光信号的穿通代价和非线性失真代价组成，调整光信号的光谱波形能够实现光谱整形的效果，从而降低光通道的穿通代价，进而提高传输性能。
另外，参照图3，在一实施例中，步骤S200包括但不限于有以下步骤：
步骤S210，当OSNR值小于预设阈值，获取OTN系统的光信号调制模式；
步骤S220，根据光信号调制模式和OSNR值从预先设定的查找表中获取光谱整形调整参数。
在一实施例中，预设阈值可以是任意数值，例如采用OTN系统的传输性能劣化阈值作为预设阈值，OSNR值小于传输性能劣化阈值的情况下，光信号无法实现正常传输，基于此，需要及时对滤波参数进行调整，以实现光谱波形的实时调整，提高光信号在光通道中的传输性能，确保OTN系统的收发正常，预设阈值也可以选取大于传输性能劣化阈值的值，以使OTN系统维持在正常的传输状态，具体的数值根据实际需求选取即可。
在一实施例中，光谱整形调整参数可以是调整量，也可以是用于替换当前滤波参数的新的滤波参数，具体类型根据实际需求选取即可。例如，光谱整形调整参数为调整量，则以当前的滤波参数与光谱整形调整参数相加后得出调整后的滤波参数，整形滤波器根据该调整后的滤波参数对光信号进行滤波；又如，光谱整形调整参数为新的滤波参数，则光发射单元用该新的滤波参数替换掉当前正在使用的滤波参数，以新的滤波参数对光信号的光谱波形进行调整。值得注意的是，当光谱整形调整参数为调整量时，该调整量可以是固定值，也可以是变量，例如是与时域相关的函数，根据实际需求选取具体的调整量类型，能够实现对滤波参数的调整即可。
在一实施例中，光信号调制模式可以通过路由分析获取，例如通过控制单元获取当前的传输光纤类型、光链路状况以及光发射、光接收的性能指标进行确定。需要说明的是，光信号调制模式可以是任意类型的高阶调制模式，例如超100G光网络中用到的相位调制(phase modulator，PM)，可以是PM-8QAM、PM-16QAM或PM-QPSK等。由于OTN系统在不同的光信号调制模式下，光接收单元的工作状态不同，调整滤波参数能够实现的OSNR优化效果不同，因此可以在通过OSNR值获取光谱整形调整参数时，同时以光信号调制模式作为在查找表中进行匹配的参考数据，例如在光调制模式分别为PM-8QAM、PM-16QAM或PM-QPSK时，光接收单元的OSNR值相同且业务速率同为200G的情况下，通过查找表所获取的光谱整形调整参数互不相同，以使得滤波参数在调整后能够分别适用于对应的光调制模式，从而达到更好的传输性能，每种光调制模式下对应的光谱整形调整参数根据实际OTN系统的要求选取即可。
在一实施例中，根据OSNR值和光调制模式获取光谱整形调整参数可以是通过查找表进行匹配，也可以是预先设定好公式计算得出。需要说明的是，若通过预先设定的查找表获取光谱整形参数，可以在查找表中设定与OSNR值对应的具体数值或变量，以该数值或变量作为光谱整形调整参数，也可以是在查找表中设定与OSNR值对应的计算公式，根据实际需求选取即可。
另外，参照图4，在一实施例中，步骤S200包括但不限于有以下步骤：
步骤S230，当OSNR值大于等于预设阈值，控制光发射单元维持整形滤波器的当前滤波参数，以使光发射单元维持光信号的当前光谱波形。
基于上述实施例，由于OSNR值是光通道传输质量的性能指标，在预设阈值是OTN系统的传输性能劣化阈值的情况下，当OSNR值大于等于预设阈值，则OTN系统的光通道传输性能符合传输需求，可以维持整形滤波器的当前滤波参数，也可以对滤波参数进行进一步的调整，从而使得OSNR值达到更高的光传输要求，具体的调整方式根据实际需求选取即可。
值得注意的是，为了维持整形滤波器的当前滤波参数，可以是向光发射单元发送维持滤波参数的指令，也可以是不向光发射单元发送任何指令，在光发射单元没有接受到指令的情况下，不会作出相应的调整，从而实现维持整形滤波器的当前滤波参数。
另外，在一实施例中，OSNR值包括光接收单元的OSNR容限值、光通道的OSNR代价和OTN系统的OSNR冗余量，预设阈值通过以下公式获取：Y 0＝k 1X 1+k 2X 2+k 3X 3+Δ；其中，Y 0为预设阈值，X 1为OSNR容限值，X 2为OSNR代价，X 3为OSNR冗余量，k 1、k 2和k 3为预先设定的校验系数，Δ为预先设定的校验偏移量。
在一实施例中，OSNR值可以包括任意与OSNR相关的数值类型，例如光接收单元的OSNR容限值、光通道的OSNR代价和OTN系统的OSNR冗余量，根据实际需求选取具体的数值类型即可。
基于上述实施例，预设阈值可以通过任意公式计算，例如在OSNR值包括光接收单元的OSNR容限值、光通道的OSNR代价和OTN系统的OSNR冗余量的情况下，预设阈值可以通过以下公式计算：Y 0＝k 1k 1+k 2X 2+k 3X 3+Δ；其中，k 1、k 2和k 3为预先设定的校验系数，可以是任意取值，例如k 1、k 2和k 3均设置为1，则光接收单元的OSNR容限值、光通道的OSNR代价和OTN系统的OSNR冗余量的权重相同，实际取值根据上述三者在光传输链路中的权重选取即可。值得注意的是，Δ为预先设定的校验偏移量，即在X 1、 X 2和X 3均为0的情况下的预设阈值，基于此，Δ可以是OTN系统的传输性能劣化阈值，具体的取值根据实际需求选取即可。
另外，在一实施例中，OSNR值和光谱整形调整参数可以通过带外光波长标签信道传输，也可以通过光监控信道传输。
值得注意的是，OSNR值的传输可以通过任意连接于控制单元与OTU之间的信道，例如带外光波长标签信道直接连接于控制单元和OTU之间，而光接收单元设置于OTU中，因此可以通过该信道将OSNR值从光接收单元发送至控制单元；又如，OTN系统中包括若干个光监控平台，被设置成获取光通道的数据，以确保OTN系统正常运行，因此OTU、光监控平台和控制单元之间可以进行通信，则可以被设置成发送OSNR值，当然，也可以采用其他类型的信道获取OSNR值，根据实际需求选取即可。
如图5所示，图5是本申请一个实施例提供的光信号处理方法的流程图，该光信号处理方法包括但不限于有步骤S1000、步骤S2000和步骤S3000。
步骤S1000，接收来自控制单元的光谱整形调整参数，光谱整形调整参数由控制单元根据来自光接收单元的OSNR值而获取。
在一实施例中，光谱整形调整参数可以由OTN系统的控制单元根据光接收单元的OSNR值获取，其具体原理可以参考图3所示实施例，在此不再赘述。
步骤S2000，根据光谱整形调整参数调整整形滤波器的滤波参数。
在一实施例中，补偿控制器接收到光谱整形调整参数后，可以是实时对滤波参数进行调整，使得光发射单元的光信号的光谱波形实时调整，确保OTN系统的传输性能满足需求。需要说明的是。
步骤S3000，利用调整后的整形滤波器调整光信号的光谱波形。
在一实施例中，整形滤波器可以是任意类型的整形滤波器，例如脉冲整形滤波器，通过脉冲整形滤波器对光信号的光谱波形进行滤波能够实现光谱整形的效果，减少光通道的穿通代价，从而降低光通道的OSNR代价，增加无中继传输距离。
需要说明的是，本实施例与图2所示的实施例的光信号处理方法大致相同，主要区别在于图2所示的实施例的光信号处理方法的执行主体为OTN系统的控制单元，本实施例的光信号处理方法的执行主体为光发射单元，为了叙述简洁，后续对相似的原理不再赘述。
另外，参照图6，在一实施例中，步骤S2000包括但不限于有以下步骤：
步骤S2100，根据光谱整形调整参数调整整形滤波器的滚降因子和抽头系数。
在一实施例中，可以通过光谱整形调整参数同时对滚降因子和抽头系数进行调整，也可以仅调整其中一个参数，根据实际需求选取，调整后能够满足传输需求即可。
另外，参照图7，在一实施例中，步骤S3000包括但不限于有以下步骤：
步骤S3100，根据调整后的滚降因子和抽头系数，对光信号的光谱波形进行预加重处理。
在一实施例中，通过对滚降因子和抽头系数的调整，能够使得光信号的光谱波形发生变化，能够实现任意整形效果，例如实现在光谱特性上等同于预加重处理的效果，从而补偿光纤链路OSNR代价损失。
另外，在一实施例中，光谱整形调整参数可以通过带外光波长标签信道传输，也可以通过光监控信道传输。
值得注意的是，通过带外光波长标签信道或者光监控信道获取光谱整形调整参数的原理和图6所示实施例的原理近似，在此不再赘述。
另外，参照图8，在一实施例中，步骤S2000包括但不限于有以下步骤：
步骤S2200，当没有接收到来自控制单元的光谱整形调整参数，维持整形滤波器的当前滤波参数，以使光发射单元维持光信号的当前光谱波形。
在一实施例中，当光接收单元的OSNR值大于等于预设阈值，维持整形滤波器的当前滤波参数的原理与图4所示实施例的原理相似，在此不再赘述。
另外，参考图9，图9是本申请另一个实施例提供的一种用于执行光信号处理方法的OTN系统的结构示意图，其中，以下以具体示例对本申请实施例的技术方案进行举例说明：
如图9所示，OTN系统包括若干个OTU910，OTU910包括若干个光发射单元920、若干个光接收单元930和补偿控制器940，还包括控制单元950，控制单元950能够通过带外光波长标签信道与OTU进行数据交互，光接收单元930的输出端与补偿控制器940连接，光发射单元920与补偿控制器940双向连接。在光发射单元920开始发出光信号之前，控制单元950获取预先设定的初始滤波参数，并将初始滤波参数发送至补偿控制器940，补偿控制器940根据该初始滤波参数调整整型滤波器的滤波参数，将光信号进行滤波之后向光接收单元930发射，其光谱波形如图10A所示；光接收单元930接收到该光信号后进行OSNR检测，将获取OSNR值通过带外光波长标签信道发送 至系统控制器950，其中，OSNR值包括光接收单元的OSNR容限值、光通道的OSNR代价和OTN系统的OSNR冗余量；系统控制器950接收到该OSNR值后，将OSNR值与预设阈值进行对比，当OSNR值大于等于预设阈值，则维持当前的滤波参数，当OSNR值小于预设阈值，获取OTN系统的光信号调制模式，根据光信号调制模式和OSNR值从预先设定的查找表中获取光谱整形调整参数，并将光谱整形调整参数发送至补偿控制器940；补偿控制器940接收到该光谱整形调整参数后，根据光谱整形调整参数对整形滤波器的滚降因子和抽头系数进行调整，使得光发射单元920利用调整后的整形滤波器调整光信号的光谱波形，其光谱波形如图10B所示，在光谱特性上实现预加重的效果，其中，图10A和图10B中坐标轴的横轴为时间，纵轴为光信号的频率；采用本实施例的技术方案，能够根据光接收单元930的OSNR值获取光谱整形调整参数，从而对光发射单元920发出的光信号的光谱波形进行调整，实现了光信道补偿，有效降低了穿通代价，补偿了OSNR代价的损失，提高了无中继传输距离，从而提高OTN系统的传输性能。
另外，参考图11，图11本申请另一个实施例提供的一种用于执行光信号处理方法的OTN系统的结构示意图，图11的OTN系统包括若干个OTU1110，OTU1110包括若干个光发射单元1120、若干个光接收单元1130、补偿控制器1140、OSNR检测单元1150、光监控平台1160和控制单元1170，其中，光发射单元1120与补偿控制器1140双向连接，光接收单元1130与OSNR检测单元1150连接，光监控平台1160与OTU1110连接并且能够用于获取OTU1110中的数据并且能够向补偿控制器1140发送光谱整形调整参数，控制单元1170与光监控平台1160通信连接。
图11中所示实施例的具体原理与图9所示的实施例的原理近似，主要区别在于OTU的OSNR值和光谱整形调整参数通过光监控平台1160的信道与控制单元1170进行通信，OSNR值、光谱整形调整参数和对滤波参数调整的原理和滤波效果与图9所示实施例类似，在此不再赘述。
另外，本申请的一个实施例还提供了一种控制单元，该控制单元包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序。
处理器和存储器可以通过总线或者其他方式连接。
需要说明的是，本实施例中的控制单元能够构成图1所示实施例中的OTN系统的一部分，这些实施例均属于相同的发明构思，因此这些实施例具有相同的实现原理以及技术效果，此处不再详述。
实现上述实施例的光信号处理方法所需的非暂态软件程序以及指令存储在存储器中，当被处理器执行时，执行上述实施例中的应用于控制单元的光信号处理方法，例如，执行以上描述的图2中的方法步骤S100至S300，图3中的方法步骤S210至S220，图4中的方法步骤S230。
另外，本申请的一个实施例还提供了一种光发射单元，该光发射单元包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序。
处理器和存储器可以通过总线或者其他方式连接。
需要说明的是，本实施例中的光发射单元能够构成图1所示实施例中的OTN系统的一部分，这些实施例均属于相同的发明构思，因此这些实施例具有相同的实现原理以及技术效果，此处不再详述。
实现上述实施例的光信号处理方法所需的非暂态软件程序以及指令存储在存储器中，当被处理器执行时，执行上述实施例中的应用于光发射单元的光信号处理方法，例如，执行以上描述的图5中的方法步骤S1000至S3000，图6中的方法S2100，图7中的方法S3100和图8中的方法S2200。
以上所描述的装置实施例仅仅是示意性的，其中作为分离部件说明的单元可以是或者也可以不是物理上分开的，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
此外，本申请的一个实施例还提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机可执行指令，该计算机可执行指令被一个处理器或控制器执行，例如，被上述控制单元实施例中的一个处理器执行，可使得上述处理器执行上述实施例中的应用于控制单元的光信号处理方法，例如，执行以上描述的图2中的方法步骤S100至S300，图3中的方法步骤S210至S220和图4中的方法步骤S230；或者，被上述光发射单元实施例中的一个处理器执行，可使得上述处理器执行上述实施例中的应用于光发射单元的光信号处理方法，例如，执行以上描述的图5中的方法步骤S1000至S3000，图6中的方法S2100，图7中的方法S3100和图8中的方法S2200。
本申请实施例包括：获取来自光接收单元的OSNR值；根据所述OSNR值获取光谱整形调整参数；向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数，以使光发射单元利用调整后的所述整形滤波器调整光信号的光谱波形。根据本申请实施例提供的方案，控制单元能够根据来自光接收单元的OSNR值控制光发射单元调整整形滤波器的滤波 参数，从而使得光发射单元可以调整光信号的光谱波形，提高OTN系统的传输性能。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统可以被实施为软件、固件、硬件及其适当的组合。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
以上是对本申请的一些实施进行了具体说明，但本申请并不局限于上述实施方式，熟悉本领域的技术人员在不违背本申请范围的前提下还可作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (14)

  1. 一种光信号处理方法，应用于控制单元，包括：
    获取来自光接收单元的光信噪比OSNR值；
    根据所述OSNR值获取光谱整形调整参数；
    向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数，以使光发射单元利用调整后的所述整形滤波器调整光信号的光谱波形。
  2. 根据权利要求1所述的一种光信号处理方法，其中，所述根据所述OSNR值获取光谱整形调整参数，包括：
    当所述OSNR值小于预设阈值，获取OTN系统的光信号调制模式；
    根据所述光信号调制模式和所述OSNR值从预先设定的查找表中获取光谱整形调整参数。
  3. 根据权利要求2所述的一种光信号处理方法，其中，还包括：
    当所述OSNR值大于等于所述预设阈值，控制光发射单元维持所述整形滤波器的当前滤波参数，以使光发射单元维持光信号的当前光谱波形。
  4. 根据权利要求2或3所述的一种光信号处理方法，其中，所述OSNR值包括光接收单元的OSNR容限值、光通道的OSNR代价和光传送网OTN系统的OSNR冗余量，所述预设阈值通过以下公式获取：Y 0＝k 1X 1+k 2X 2+k 3X 3+Δ；
    其中，Y 0为所述预设阈值，X 1为所述OSNR容限值，X 2为所述OSNR代价，X 3为所述OSNR冗余量，k 1、k 2和k 3为预先设定的校验系数，Δ为预先设定的校验偏移量。
  5. 根据权利要求1所述的一种光信号处理方法，其中，所述获取来自光接收单元的OSNR值，包括：
    通过带外光波长标签信道获取OSNR值；
    或者，
    通过OTN系统的光监控信道获取OSNR值。
  6. 根据权利要求1所述的一种光信号处理方法，其中，所述向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数，包括：
    通过带外光波长标签信道向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数；
    或者，
    通过OTN系统的光监控信道向光发射单元发送所述光谱整形调整参数以调整光发射单元的整形滤波器的滤波参数。
  7. 一种光信号处理方法，应用于光发射单元，包括：
    接收来自控制单元的光谱整形调整参数，所述光谱整形调整参数由控制单元根据来自光接收单元的OSNR值而获取；
    根据所述光谱整形调整参数调整整形滤波器的滤波参数；
    利用调整后的所述整形滤波器调整光信号的光谱波形。
  8. 根据权利要求7所述的一种光信号处理方法，其中，所述根据所述光谱整形调整参数调整整形滤波器的滤波参数，包括：
    根据所述光谱整形调整参数调整所述整形滤波器的滚降因子和抽头系数。
  9. 根据权利要求8所述的一种光信号处理方法，其中，所述利用调整后的所述整形滤波器调整光信号的光谱波形，包括：
    根据调整后的所述滚降因子和所述抽头系数，对所述光信号的光谱波形进行预加重处理。
  10. 根据权利要求7所述的一种光信号处理方法，其中，所述接收来自控制单元的光谱整形调整参数，包括：
    通过带外光波长标签信道或者OTN系统的光监控信道接收来自控制单元的光谱整形调整参数。
  11. 根据权利要求7所述的一种光信号处理方法，其中，还包括：
    当没有接收到来自控制单元的光谱整形调整参数；
    维持所述整形滤波器的当前滤波参数，以使光发射单元维持光信号的当前光谱波形。
  12. 一种控制单元，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如权利要求1至6中任意一项所述的光信号处理方法。
  13. 一种光发射单元，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如权利要求7至11中任意一项所述的光信号处理方法。
  14. 一种计算机可读存储介质，存储有计算机可执行指令，其中，所述计算机可执行指令用于执行如权利要求1至6中任意一项所述的光信号处理方法，或执行如权利要求7至11中任意一项所述的光信号处理方法。
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