Optical signal processing method, control unit, optical emission unit and storage medium

Abstract

The present invention discloses an optical signal processing method, a control unit, an optical transmitting unit and a storage medium. The optical signal processing method includes: obtaining an OSNR value from an optical receiving unit; obtaining a spectrum shaping adjustment parameter according to the OSNR value; sending the spectrum shaping adjustment parameter to the optical transmitting unit to adjust the filtering parameter of the shaping filter of the optical transmitting unit, so that the optical transmitting unit uses the adjusted shaping filter to adjust the spectrum waveform of the optical signal. In an embodiment of the present invention, the optical transmitting unit is controlled to adjust the filtering parameter of the shaping filter according to the OSNR value from the optical receiving unit, so that the optical transmitting unit can adjust the spectrum waveform of the optical signal and improve the transmission performance of the OTN system.

Description

Technical Field

[0001] The embodiments of the present invention relate to, but are not limited to, the field of optical communications, and in particular, to an optical signal processing method, a control unit, an optical transmission unit, and a computer-readable storage medium. Background Art

[0002] The Optical Transport Network (OTN) system is an important part of optical fiber communication. With the development of optical fiber communication technology, the application of super 100G optical network based on coherent optical detection is becoming more and more widespread. Super 100G optical network makes extensive use of high-order modulation technologies such as Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM), which makes the baud rate of single-carrier transmission signal higher. Therefore, super 100G optical network has higher requirements for optical fiber links, which requires complex design and verification when carrying out engineering design of super 100G optical network. In addition, when the optical fiber routing or optical path indicators change, even if 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. Summary of the invention

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0004] The embodiments of the present invention provide an optical signal processing method, a control unit, an optical transmitting unit and a computer-readable storage medium, which can adjust the spectrum waveform of the optical signal and improve the transmission performance of the OTN system.

[0005] In a first aspect, an embodiment of the present invention provides an optical signal processing method, which is applied to a control unit, comprising:

[0006] Obtaining an OSNR value from an optical receiving unit;

[0007] Acquire spectrum shaping adjustment parameters according to the OSNR value;

[0008] The spectrum shaping adjustment parameter is sent to the optical emitting unit to adjust the filtering parameter of the shaping filter of the optical emitting unit, so that the optical emitting unit adjusts the spectrum waveform of the optical signal by using the adjusted shaping filter.

[0009] In a second aspect, an embodiment of the present invention provides an optical signal processing method, which is applied to an optical transmitting unit, comprising:

[0010] Receiving a spectrum shaping adjustment parameter from a control unit, wherein the spectrum shaping adjustment parameter is obtained by the control unit according to an OSNR value from a light receiving unit;

[0011] adjusting filtering parameters of a shaping filter according to the spectrum shaping adjustment parameters;

[0012] The spectral waveform of the optical signal is adjusted using the adjusted shaping filter.

[0013] In a third aspect, an embodiment of the present invention further provides a control unit, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the optical signal processing method of the first aspect described above is implemented.

[0014] In a fourth aspect, an embodiment of the present invention further provides an optical transmission unit, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the optical signal processing method according to the second aspect described above is implemented.

[0015] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the optical signal processing method as described above.

[0016] The embodiment of the present invention includes: obtaining an OSNR value from an optical receiving unit; obtaining a spectrum shaping adjustment parameter according to the OSNR value; and sending the spectrum shaping adjustment parameter to an optical transmitting unit to adjust the filtering parameter of a shaping filter of the optical transmitting unit, so that the optical transmitting unit uses the adjusted shaping filter to adjust the spectrum waveform of the optical signal. According to the scheme provided by the embodiment of the present invention, the control unit can control the optical transmitting unit to adjust the filtering parameter of the shaping filter according to the OSNR value from the optical receiving unit, so that the optical transmitting unit can adjust the spectrum waveform of the optical signal and improve the transmission performance of the OTN system.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0019] Figure 1is a schematic diagram of an OTN system for executing an optical signal processing method provided by an embodiment of the present invention;

[0020] Figure 2 is a flow chart of an optical signal processing method provided by an embodiment of the present invention;

[0021] Figure 3 is a flow chart of obtaining spectrum shaping adjustment parameters in an optical signal processing method provided by another embodiment of the present invention;

[0022] Figure 4 is a flow chart of maintaining current filtering parameters in an optical signal processing method provided by another embodiment of the present invention;

[0023] Figure 5 is a flow chart of an optical signal processing method provided by another embodiment of the present invention;

[0024] Figure 6 is a flow chart of adjusting filtering parameters in an optical signal processing method provided by another embodiment of the present invention;

[0025] Figure 7 is a flow chart of adjusting a spectrum waveform in an optical signal processing method provided by another embodiment of the present invention;

[0026] Figure 8 is a flow chart of maintaining current filtering parameters in an optical signal processing method provided by another embodiment of the present invention;

[0027] Fig. 9 is a structural diagram of an OTN system to which an optical signal processing method is applied provided by another embodiment of the present invention;

[0028] Fig. 10A is a spectrum waveform diagram of an optical signal before filtering provided by another embodiment of the present invention;

[0029] Fig. 10B is a spectrum waveform diagram of an optical signal after filtering provided by another embodiment of the present invention;

[0030] Fig.11 It is a structural diagram of an OTN system to which an optical signal processing method is applied provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims or the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0033] The present invention provides an optical signal processing method, device and computer-readable storage medium, which obtain an OSNR value from an optical receiving unit; and control an optical transmitting unit to adjust the filtering parameters of a shaping filter according to the OSNR value, so that the optical transmitting unit uses the adjusted shaping filter to adjust the spectral waveform of the optical signal. According to the scheme provided by an embodiment of the present invention, 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, optimizing the penetration cost, reducing the ONSR cost of the optical channel, and improving the transmission performance of the OTN system.

[0034] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0035] like Figure 1 As shown, Figure 1 The diagram is a schematic diagram of an OTN system for executing an optical signal processing method provided by an embodiment of the present invention.

[0036] exist Figure 1 In the example, the OTN system includes an optical transmitting unit 110, an optical receiving unit 120 and a control unit 130, wherein the optical transmitting unit 110 is communicatively connected with the optical receiving unit 120, and the optical transmitting unit 110 is used to send the modulated optical signal to the optical receiving unit 120 through an optical channel; the control unit 130 is communicatively connected with the optical transmitting unit 110 and the optical receiving unit 120 respectively, that is, the control unit 130 can receive information from the optical receiving unit 120 and the optical transmitting unit 110, and can also send control information to the optical receiving unit 120 and the optical transmitting unit 110. The specific communication channel can be selected according to actual needs, such as an out-of-band optical wavelength label channel or an optical monitoring channel, as long as information transmission can be realized.

[0037] Those skilled in the art can understand that the control unit 130 can be a system control platform or a server or other device that can realize data monitoring and processing, and this embodiment does not specifically limit this. In addition, the OTN system with the control unit can be applied to various optical transmission network systems, for example, it can be applied to 100G optical transmission networks, and it can also be applied to beyond 100G optical transmission networks, and this embodiment does not specifically limit this.

[0038] It can be understood by those skilled in the art that Figure 1 The OTN system elements shown in the figure do not constitute a limitation on the embodiments of the present invention, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0039] It should be noted that the optical transmitting unit 110 and the optical receiving unit 120 of the embodiment of the present invention may be components disposed in an optical transform unit (OTU) or may be independent components, and this embodiment does not specifically limit this. It is worth noting that if the OTN system includes multiple sets of parallel optical channels, the optical signal processing method of the present invention may be independently executed on the optical transmitting unit 110 and the optical receiving unit 120 of each optical channel by the control unit 130, or each OTU may be uniformly adjusted, and this embodiment does not specifically limit this.

[0040] It should be noted that the optical transmission unit 110 may include an optical transmission end 111 and a compensation controller 112, wherein the optical transmission end 111 is used to emit a modulated and filtered optical signal, and the compensation controller 112 is used to adjust the filtering parameters of the shaping filter according to the spectral waveform adjustment parameters sent by the control unit 130. The compensation controller 112 can be an independent functional component, such as a single-chip microcomputer or a field programmable gate array (Field Programmable Gate Array, PFGA) chip, or it can be a software function module in the optical transmission unit 110. This embodiment does not make specific limitations on this.

[0041] It should be noted that the optical receiving unit 120 may include an optical receiving end 121 and an OSNR detection unit 122. The optical receiving end 121 is used to receive an optical signal from the optical transmitting end 111. The OSNR detection unit 122 can obtain the OSNR value of the optical channel when the optical receiving end 121 receives the optical signal. The OSNR detection unit 122 can be an independent functional hardware or a software function module of the optical receiving unit 120, and this embodiment does not make a specific limitation on this.

[0042] Based on the above control unit, various embodiments of the optical signal processing method of the present invention are proposed below.

[0043] like Figure 2 As shown, Figure 2 It is a flow chart of an optical signal processing method provided by an embodiment of the present invention. The optical signal processing method includes but is not limited to step S100, step S200 and step S300.

[0044] Step S100, obtaining an OSNR value from an optical receiving unit.

[0045] In one embodiment, the OSNR value can be obtained in real time, or can be obtained at a set time period, or can be obtained manually, and can be selected according to actual needs. For example, the scheme of obtaining the OSNR value in real time can reflect the transmission performance of the current optical channel in real time, and can adjust the spectrum waveform of the optical transmitting unit in time when the transmission performance of the optical channel decreases, so as 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 by scanning, and this embodiment does not impose any restrictions.

[0046] In one embodiment, the OSNR value can be directly obtained by setting an OSNR detection unit in the optical receiving unit, or the parameters used to calculate the OSNR value can be sent to the control unit for calculation, and the parameters can be the signal power, equivalent noise bandwidth, noise power and reference optical bandwidth of the optical channel, etc., which are not limited in this embodiment. It is worth noting that after the optical signal enters the optical receiving unit, it needs to be processed by coherent optical reception, dispersion compensation, etc., and finally demodulate the data service signal. The acquisition of the OSNR value requires parameters such as signal power. The OSNR value can be obtained after the data service signal is demodulated to ensure that the obtained OSNR value can accurately reflect the current transmission quality.

[0047] Step S200: obtaining spectrum shaping adjustment parameters according to the OSNR value.

[0048] In one embodiment, the shaping filter may be a pulse shaping filter or other shaping filters, and it only needs to be able to digitally filter the spectrum waveform of the optical signal, and this embodiment does not specifically limit this. It is worth noting that the spectrum shaping can be achieved by adjusting the tap coefficient and roll-off factor of the shaping filter, that is, the spectrum waveform of the output optical signal is pre-emphasized, thereby adjusting the shape of the spectrum waveform and compensating for the OSNR cost loss of the optical fiber link.

[0049] Step S300 : sending spectrum shaping adjustment parameters to the optical emitting unit to adjust the filtering parameters of the shaping filter of the optical emitting unit, so that the optical emitting unit adjusts the spectrum waveform of the optical signal by using the adjusted shaping filter.

[0050] In one embodiment, the beyond 100G optical network makes extensive use of high-order modulation technologies such as QPSK, 8QAM, 16QAM, 32QAM and 64QAM, so that the baud rate of the single-carrier transmission signal is relatively high. When the fiber routing or optical path indicators change, the transmission performance is greatly affected. The transmission performance of the high-order modulation OTN system is related to the unrelayed transmission distance. In order to increase the unrelayed transmission distance, it can be achieved by reducing the OSNR cost of the optical channel. The optical channel ONSR cost is mainly composed of the penetration cost and nonlinear distortion cost of the service optical signal. Adjusting the spectral waveform of the optical signal can achieve the effect of spectral shaping, thereby reducing the penetration cost of the optical channel and improving the transmission performance.

[0051] In addition, refer to Figure 3 In one embodiment, step S200 includes but is not limited to the following steps:

[0052] Step S210, when the OSNR value is less than a preset threshold, obtaining an optical signal modulation mode of the OTN system;

[0053] Step S220: Obtain spectrum shaping adjustment parameters from a preset lookup table according to the optical signal modulation mode and the OSNR value.

[0054] In one embodiment, the preset threshold value may be any value. For example, the transmission performance degradation threshold value of the OTN system is used as the preset threshold value. When the OSNR value is less than the transmission performance degradation threshold value, the optical signal cannot be transmitted normally. Based on this, it is necessary to adjust the filtering parameters in time to achieve real-time adjustment of the spectral waveform, improve the transmission performance of the optical signal in the optical channel, and ensure normal transmission and reception of the OTN system. The preset threshold value may also be selected as a value greater than the transmission performance degradation threshold value so that the OTN system maintains a normal transmission state. The specific value may be selected according to actual needs.

[0055] In one embodiment, the spectrum shaping adjustment parameter may be an adjustment amount or a new filter parameter used to replace the current filter parameter. The specific type may be selected according to actual needs. For example, if the spectrum shaping adjustment parameter is an adjustment amount, the adjusted filter parameter is obtained by adding the current filter parameter to the spectrum shaping adjustment parameter, and the shaping filter filters the optical signal according to the adjusted filter parameter. For another example, if the spectrum shaping adjustment parameter is a new filter parameter, the optical emission 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 spectrum shaping adjustment parameter is an adjustment amount, the adjustment amount may be a fixed value or a variable, such as a function related to the time domain. The specific type of adjustment amount may be selected according to actual needs to achieve the adjustment of the filter parameter.

[0056] In one embodiment, the optical signal modulation mode can be obtained through routing analysis, for example, by obtaining the current transmission fiber type, optical link status, and optical transmission and optical reception performance indicators through the control unit. It should be noted that the optical signal modulation mode can be any type of high-order modulation mode, such as phase modulation (PM) used in ultra-100G optical networks, which can be PM-8QAM, PM-16QAM or PM-QPSK. Since the working states of the optical receiving units in the OTN system are different under different optical signal modulation modes, the OSNR optimization effects that can be achieved by adjusting the filtering parameters are different. Therefore, when the spectrum shaping adjustment parameters are obtained through the OSNR value, the optical signal modulation mode can be used as reference data for matching in the lookup table. For example, when the optical modulation modes are PM-8QAM, PM-16QAM or PM-QPSK, the OSNR values ​​of the optical receiving units are the same and the service rate is 200G, the spectrum shaping adjustment parameters obtained through the lookup table are different, so that the filtering parameters can be applied to the corresponding optical modulation modes after adjustment, thereby achieving better transmission performance. The corresponding spectrum shaping adjustment parameters for each optical modulation mode can be selected according to the requirements of the actual OTN system.

[0057] In one embodiment, the spectrum shaping adjustment parameter can be obtained according to the OSNR value and the optical modulation mode by matching through a lookup table, or by calculating with a pre-set formula. It should be noted that if the spectrum shaping parameter is obtained through a pre-set lookup table, a specific value or variable corresponding to the OSNR value can be set in the lookup table, and the value or variable is used as the spectrum shaping adjustment parameter, or a calculation formula corresponding to the OSNR value can be set in the lookup table, and it can be selected according to actual needs.

[0058] In addition, refer to Figure 4 In one embodiment, step S200 includes but is not limited to the following steps:

[0059] Step S230: When the OSNR value is greater than or equal to the preset threshold, the optical emitting unit is controlled to maintain the current filtering parameters of the shaping filter, so that the optical emitting unit maintains the current spectrum waveform of the optical signal.

[0060] Based on the above embodiment, since the OSNR value is a performance indicator of the optical channel transmission quality, when the preset threshold is the transmission performance degradation threshold of the OTN system, when the OSNR value is greater than or equal to the preset threshold, the optical channel transmission performance of the OTN system meets 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 reaches a higher optical transmission requirement, and the specific adjustment method can be selected according to actual needs.

[0061] It is worth noting that in order to maintain the current filtering parameters of the shaping filter, an instruction to maintain the filtering parameters may be sent to the optical emitting unit, or no instruction may be sent to the optical emitting unit. If the optical emitting unit does not receive an instruction, no corresponding adjustment will be made, thereby maintaining the current filtering parameters of the shaping filter.

[0062] In addition, in one embodiment, 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, and the preset threshold is obtained by the following formula: 0 =k 1 X 1 +k 2 X 2 +k 3 X 3 +Δ; where Y 0 is the preset threshold, X 1 is the OSNR tolerance value, X 2 is the OSNR cost, X 3 is the OSNR redundancy, k 1 , k 2 and k 3 is a preset calibration coefficient, and Δ is a preset calibration offset.

[0063] In one embodiment, 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 may be selected according to actual needs.

[0064] Based on the above embodiment, the preset threshold value may be calculated by any formula. For example, when 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, the preset threshold value may be calculated by the following formula: 0 =k 1 X 1 +k 2 X 2 +k 3 X 3 +Δ; where k 1 , k 2 and k 3 is a pre-set calibration coefficient, which can be any value, such as k 1 , k 2 and k 3If all are set to 1, the weights of the OSNR tolerance value of the optical receiving unit, the OSNR cost of the optical channel and the OSNR redundancy of the OTN system are the same. The actual value can be selected according to the weights of the above three in the optical transmission link. It is worth noting that Δ is the pre-set calibration offset, that is, 1 , X 2 and X 3 The preset threshold value is when both are 0. Based on this, Δ may be the transmission performance degradation threshold of the OTN system. The specific value may be selected according to actual needs.

[0065] In addition, in one embodiment, the OSNR value and the spectrum shaping adjustment parameter may be transmitted through an out-of-band optical wavelength label channel or through an optical supervisory channel.

[0066] It is worth noting that the OSNR value can be transmitted through any channel connected between the control unit and the OTU. For example, 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. Therefore, the OSNR value can be sent from the optical receiving unit to the control unit through this channel; for example, the OTN system includes several optical monitoring platforms for obtaining data of the optical channel to ensure the normal operation of the OTN system. Therefore, the OTU, the optical monitoring platform and the control unit can communicate with each other, which can be used to send the OSNR value. Of course, other types of channels can also be used to obtain the OSNR value, which can be selected according to actual needs.

[0067] like Figure 5 As shown, Figure 5 It is a flow chart of an optical signal processing method provided by an embodiment of the present invention. The optical signal processing method includes but is not limited to step S1000, step S2000 and step S3000.

[0068] Step S1000: receiving spectrum shaping adjustment parameters from a control unit, where the spectrum shaping adjustment parameters are obtained by the control unit according to an OSNR value from a light receiving unit.

[0069] In one embodiment, 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 specific principle can be referred to Figure 3 The illustrated embodiments will not be described in detail here.

[0070] Step S2000: adjusting filtering parameters of the shaping filter according to the spectrum shaping adjustment parameters.

[0071] In one embodiment, after receiving the spectrum shaping adjustment parameter, the compensation controller may adjust the filtering parameter in real time, so that the spectrum waveform of the optical signal of the optical transmitting unit is adjusted in real time to ensure that the transmission performance of the OTN system meets the requirements.

[0072] Step S3000: using the adjusted shaping filter to adjust the spectral waveform of the optical signal.

[0073] In one embodiment, the shaping filter may 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, reduce the penetration cost of the optical channel, thereby reducing the OSNR cost of the optical channel and increasing the relay-free transmission distance.

[0074] It should be noted that this embodiment is different from Figure 2 The optical signal processing methods of the embodiments shown are substantially the same, the main difference being that Figure 2 The optical signal processing method of the illustrated embodiment is executed by a control unit of the OTN system. The optical signal processing method of this embodiment is executed by an optical transmitting unit. For the sake of simplicity, similar principles will not be described in detail later.

[0075] In addition, refer to Figure 6 In one embodiment, step S2000 includes but is not limited to the following steps:

[0076] Step S2100: adjusting the roll-off factor and tap coefficient of the shaping filter according to the spectrum shaping adjustment parameter.

[0077] In one embodiment, the roll-off factor and the tap coefficient may be adjusted simultaneously by adjusting the spectrum shaping adjustment parameters, or only one of the parameters may be adjusted according to actual needs, and the adjustment may meet the transmission requirements.

[0078] In addition, refer to Figure 7 In one embodiment, step S3000 includes but is not limited to the following steps:

[0079] Step S3100: pre-emphasize the spectrum waveform of the optical signal according to the adjusted roll-off factor and tap coefficient.

[0080] In one embodiment, by adjusting the roll-off factor and the tap coefficient, the spectral waveform of the optical signal can be changed, and any shaping effect can be achieved, such as achieving an effect equivalent to pre-emphasis processing in spectral characteristics, thereby compensating for the OSNR cost loss of the optical fiber link.

[0081] In addition, in one embodiment, the spectrum shaping adjustment parameter may be transmitted through an out-of-band optical wavelength label channel or through an optical monitoring channel.

[0082] It is worth noting that the principle and Figure 6The principles of the illustrated embodiments are similar and will not be described in detail here.

[0083] In addition, refer to Figure 8 In one embodiment, step S2000 includes but is not limited to the following steps:

[0084] Step S2200: When no spectrum shaping adjustment parameter is received from the control unit, the current filtering parameter of the shaping filter is maintained so that the optical emitting unit maintains the current spectrum waveform of the optical signal.

[0085] In one embodiment, when the OSNR value of the optical receiving unit is greater than or equal to a preset threshold, the principle of maintaining the current filtering parameters of the shaping filter is the same as Figure 4 The principles of the illustrated embodiments are similar and will not be described in detail here.

[0086] In addition, refer to Fig. 9 , Fig. 9 1 is a schematic diagram of the structure of an OTN system for executing an optical signal processing method provided by another embodiment of the present invention, wherein the technical solution of the embodiment of the present invention is illustrated by a specific example as follows:

[0087] like Fig. 9 As shown, the OTN system includes several OTUs 910, and the OTUs 910 include several optical transmitting units 920, several optical receiving units 930, and a compensation controller 940, and also include a control unit 950. The control unit 950 can exchange data with the OTU through an out-of-band optical wavelength label channel. 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. Before the optical transmitting unit 920 starts to send out an optical signal, the control unit 950 obtains a preset initial filtering parameter and sends the initial filtering parameter to the compensation controller 940. The compensation controller 940 adjusts the filtering parameter of the shaping filter according to the initial filtering parameter, and transmits the optical signal to the optical receiving unit 930 after filtering. Its spectral waveform is as shown in FIG. Fig. 10AAs shown; after receiving the optical signal, the optical receiving unit 930 performs OSNR detection, and sends the obtained OSNR value to the system controller 950 through the out-of-band optical wavelength label channel, wherein 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, and when the OSNR value is greater than or equal to the preset threshold value, the current filtering parameter is maintained, and when the OSNR value is less than the preset threshold value, the optical signal modulation mode of the OTN system is obtained, and the spectrum shaping adjustment parameter is obtained from a preset lookup table according to the optical signal modulation mode and the OSNR value, and the spectrum shaping adjustment parameter is sent to the compensation controller 940; after receiving the spectrum shaping adjustment parameter, the compensation controller 940 adjusts the roll-off factor and the tap coefficient of the shaping filter according to the spectrum shaping adjustment parameter, so that the optical transmitting unit 920 uses the adjusted shaping filter to adjust the spectrum waveform of the optical signal, and its spectrum waveform is as shown Fig. 10B As shown, the effect of pre-emphasis is achieved on the spectral characteristics, where: Fig. 10A and Fig. 10B The horizontal axis of the coordinate axis is time, and the vertical axis is the frequency of the optical signal. By adopting the technical solution of this embodiment, the spectrum shaping adjustment parameter can be obtained according to the OSNR value of the optical receiving unit 930, so as to adjust the spectrum waveform of the optical signal emitted by the optical transmitting unit 920, realize optical channel compensation, effectively reduce the penetration cost, compensate for the loss of OSNR cost, increase the unrelayed transmission distance, and thus improve the transmission performance of the OTN system.

[0088] In addition, refer to Fig.11 , Fig.11 Another embodiment of the present invention provides a schematic diagram of the structure of an OTN system for executing an optical signal processing method. Fig.11 The OTN system includes several OTUs 1110, and the OTUs 1110 include several optical transmitting units 1120, several optical receiving units 1130, a compensation controller 1140, an OSNR detection unit 1150, an optical monitoring platform 1160 and a control unit 1170, wherein the optical transmitting unit 1120 is bidirectionally connected to the compensation controller 1140, the optical receiving unit 1130 is connected to the OSNR detection unit 1150, the optical monitoring platform 1160 is connected to the OTU 1110 and can be used to obtain data in the OTU 1110 and can send spectrum shaping adjustment parameters to the compensation controller 1140, and the control unit 1170 is communicatively connected to the optical monitoring platform 1160.

[0089] Fig.11 The specific principles of the embodiments shown in Fig. 9The principle of the embodiment shown is similar, the main difference is that the OSNR value and spectrum shaping adjustment parameter of the OTU communicate with the control unit 1170 through the channel of the optical monitoring platform 1160, and the principle and filtering effect of the OSNR value, spectrum shaping adjustment parameter and adjustment of the filtering parameter are the same as those of the embodiment shown in FIG. Fig. 9 The embodiments shown are similar and will not be described again here.

[0090] In addition, an embodiment of the present invention further provides a control unit, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor.

[0091] The processor and the memory may be connected via a bus or other means.

[0092] It should be noted that the control unit in this embodiment can constitute Figure 1 The illustrated embodiments are a part of the OTN system. These embodiments all belong to the same inventive concept, and therefore have the same implementation principle and technical effect, which will not be described in detail herein.

[0093] The non-transient software program and instructions required to implement the optical signal processing method of the above embodiment are stored in the memory. When executed by the processor, the optical signal processing method applied to the control unit in the above embodiment is executed, for example, the above described Figure 2 The method steps S100 to S300 in Figure 3 In method steps S210 to S220, Figure 4 Method step S230 in .

[0094] In addition, an embodiment of the present invention further provides a light emitting unit, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor.

[0095] The processor and the memory may be connected via a bus or other means.

[0096] It should be noted that the light emitting unit in this embodiment can constitute Figure 1 The illustrated embodiments are a part of the OTN system. These embodiments all belong to the same inventive concept, and therefore have the same implementation principle and technical effect, which will not be described in detail herein.

[0097] The non-transient software program and instructions required to implement the optical signal processing method of the above embodiment are stored in the memory. When executed by the processor, the optical signal processing method applied to the optical transmitting unit in the above embodiment is executed, for example, the above described Figure 5 The method steps S1000 to S3000 in Figure 6 Method S2100, Figure 7 Method S3100 and Figure 8 Method S2200 in.

[0098] 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 distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0099] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are executed by a processor or a controller, for example, by a processor in the above control unit embodiment, so that the above processor can execute the optical signal processing method applied to the control unit in the above embodiment, for example, to execute the above described Figure 2 The method steps S100 to S300 in Figure 3 Method steps S210 to S220 and Figure 4 or, being executed by a processor in the above-mentioned light emitting unit embodiment, so that the above-mentioned processor can execute the optical signal processing method applied to the light emitting unit in the above-mentioned embodiment, for example, executing the above-mentioned Figure 5 The method steps S1000 to S3000 in Figure 6 Method S2100, Figure 7 Method S3100 and Figure 8 Method S2200 in.

[0100] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing 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 memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0101] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A method for processing an optical signal, applied to a control unit, comprising: Obtain an optical signal-to-noise ratio (OSNR) value from an optical receiving unit; Acquire spectrum shaping adjustment parameters according to the OSNR value; Sending the spectrum shaping adjustment parameter to the light emitting unit to adjust the filtering parameter of the shaping filter of the light emitting unit, so that the light emitting unit adjusts the spectrum waveform of the optical signal by using the adjusted shaping filter; Wherein, obtaining the spectrum shaping adjustment parameter according to the OSNR value includes: When the OSNR value is less than a preset threshold, obtaining an optical signal modulation mode of the OTN system; The spectrum shaping adjustment parameter is obtained from a preset lookup table according to the optical signal modulation mode and the OSNR value.

2. The optical signal processing method according to claim 1, characterized in that: Also includes: When the OSNR value is greater than or equal to the preset threshold, the optical emitting unit is controlled to maintain the current filtering parameters of the shaping filter, so that the optical emitting unit maintains the current spectrum waveform of the optical signal.

3. An optical signal processing method according to claim 1 or 2, characterized in that: 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 optical transport network OTN system, and the preset threshold is obtained by the following formula: Y0=k1X1+k2X2+k3X3+Δ; Among them, Y0 is the preset threshold, X1 is the OSNR tolerance value, X2 is the OSNR cost, X3 is the OSNR redundancy, k1, k2 and k3 are preset calibration coefficients, and Δ is a preset calibration offset.

4. The optical signal processing method according to claim 1, characterized in that: The obtaining of the OSNR value from the optical receiving unit comprises: Obtain OSNR value through out-of-band optical wavelength label channel; or, The OSNR value is obtained through the optical monitoring channel of the OTN system.

5. The optical signal processing method according to claim 1, characterized in that: The sending the spectrum shaping adjustment parameter to the light emitting unit to adjust the filtering parameter of the shaping filter of the light emitting unit includes: sending the spectrum shaping adjustment parameter to the optical transmission unit through an out-of-band optical wavelength label channel to adjust the filtering parameter of the shaping filter of the optical transmission unit; or, The spectrum shaping adjustment parameter is sent to the optical transmission unit through the optical supervisory channel of the OTN system to adjust the filtering parameter of the shaping filter of the optical transmission unit.

6. A method for processing an optical signal, applied to an optical transmitting unit, comprising: Receiving spectrum shaping adjustment parameters from the control unit, where the spectrum shaping adjustment parameters are obtained by the control unit from a preset lookup table according to an OSNR value from the optical receiving unit and an optical signal modulation mode of the OTN system; adjusting filtering parameters of a shaping filter according to the spectrum shaping adjustment parameters; The spectral waveform of the optical signal is adjusted using the adjusted shaping filter.

7. The optical signal processing method according to claim 6, characterized in that: The step of adjusting the filtering parameters of the shaping filter according to the spectrum shaping adjustment parameters comprises: The roll-off factor and tap coefficient of the shaping filter are adjusted according to the spectrum shaping adjustment parameter.

8. The optical signal processing method according to claim 7, characterized in that: The step of adjusting the spectral waveform of the optical signal by using the adjusted shaping filter comprises: The spectral waveform of the optical signal is pre-emphasized according to the adjusted roll-off factor and the tap coefficient.

9. The optical signal processing method according to claim 6, characterized in that: The receiving of the spectrum shaping adjustment parameter from the control unit includes: The spectrum shaping adjustment parameters are received from the control unit through an out-of-band optical wavelength label channel or an optical monitoring channel of the OTN system.

10. The optical signal processing method according to claim 6, characterized in that: Also includes: When no spectrum shaping adjustment parameters are received from the control unit; The current filtering parameters of the shaping filter are maintained so that the optical emitting unit maintains the current spectrum waveform of the optical signal.

11. A control unit, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the optical signal processing method according to any one of claims 1 to 5 when executing the computer program.

12. A light emitting unit, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the optical signal processing method according to any one of claims 6 to 10 when executing the computer program.

13. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the optical signal processing method according to any one of claims 1 to 5, or the optical signal processing method according to any one of claims 6 to 10.

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