Optical signal sending method, optical signal receiving method, optical communication apparatus and system, and device and medium

Abstract

Disclosed are an optical signal sending method, an optical signal receiving method, an optical communication apparatus and system, and a device and a medium, which belong to the technical field of communications. The optical signal sending method comprises: generating multiple channels of first data to be transmitted, wherein the multiple channels of first data to be transmitted have the same data transmission rate, at least two of the multiple channels of first data to be transmitted have different transmission configurations, and each transmission configuration comprises at least one of a modulation format, a coding scheme, and a spectral power density; using a first optical carrier to carry the multiple channels of first data to be transmitted, so as to obtain a first optical signal, wherein the first optical carrier comprises a plurality of sub-carriers, and each sub-carrier carries one channel of first data to be transmitted; and sending the first optical signal by means of a first interface, wherein the first interface has a first interface rate. The method can flexibly control the transmission configuration of each channel of first data to be transmitted, so as to meet requirements of different scenarios.

Description

Optical signal sending and receiving method, optical communication device and system, equipment and medium

[0001] The present application claims priority from the Chinese patent application No. 202410469192.4 filed on April 17, 2024 and entitled "Optical signal sending and receiving method, optical communication device and system, equipment and medium", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to an optical signal sending and receiving method, device, optical communication device and system, equipment and medium. BACKGROUND

[0003] With the development of Internet and cloud computing and other applications, the information flow in the network is growing exponentially, which requires the optical transport network (OTN) to provide more available bandwidth and develop towards higher transmission rate, for example, 400 gigabits per second (Gb / s), 800 Gb / s or 1 T Gb / s, etc.

[0004] In the related art, for an optical communication device supporting high transmission rate, multiple subcarriers can be used to carry data, and each subcarrier carries one way of data. The transmission configuration of the data carried by each subcarrier is different, so that the data transmission rate corresponding to different subcarriers is different.

[0005] In some scenarios, the data transmission performance of such optical communication device cannot meet the demand. SUMMARY

[0006] The present application provides an optical signal sending and receiving method, optical communication device and system, equipment and medium, which can flexibly set the transmission configuration of the data carried by each subcarrier of the optical signal to meet the demand of different scenarios.

[0007] In a first aspect, an optical signal sending method is provided, the optical signal sending method comprising: generating a plurality of first to-be-transmitted data, the data transmission rate of the plurality of first to-be-transmitted data being the same, and the transmission configuration of at least two of the plurality of first to-be-transmitted data being different, the transmission configuration comprising at least one of modulation format, coding mode and spectral power density; carrying the plurality of first to-be-transmitted data by using a first optical carrier to obtain a first optical signal, the first optical carrier comprising a plurality of subcarriers, each subcarrier in the first optical carrier carrying one way of the plurality of first to-be-transmitted data; and sending the first optical signal through a first interface, the first interface having a first interface rate.

[0008] In the present application, by generating multiple first to-be-transmitted data, making the data transmission rate of the multiple first to-be-transmitted data the same, and making the transmission configuration of at least two first to-be-transmitted data different, the data transmission performance of the at least two first to-be-transmitted data with different transmission configurations can be different to adapt to different scene requirements.

[0009] Exemplarily, the method can be performed by a coherent light module, for example, implemented by a transmitter in the coherent light module. The first interface is an optical output port of the coherent light module.

[0010] Optionally, the first optical carrier includes four subcarriers. The four subcarriers are a first subcarrier, a second subcarrier, a third subcarrier, and a fourth subcarrier. The carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetric about the center frequency of the first optical carrier, and the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier are symmetric about the center frequency of the first optical carrier. The carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both located between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier. That is, in the frequency domain, the first subcarrier and the third subcarrier are both located between the second subcarrier and the fourth subcarrier.

[0011] Since the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are close to the center frequency of the first optical carrier, the first subcarrier and the third subcarrier are located in the middle region of the channel, and the second subcarrier and the fourth subcarrier are located in the edge region of the channel. Due to limited bandwidth and other reasons, the channel quality of the middle region of the channel is better than that of the edge region of the channel, and therefore, the transmission configuration of the first to-be-transmitted data carried by the first subcarrier located in the middle region of the channel is the same as the transmission configuration of the first to-be-transmitted data carried by the third subcarrier also located in the middle region of the channel; and the transmission configuration of the first to-be-transmitted data carried by the first subcarrier located in the middle region of the channel is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier located in the edge region of the channel.

[0012] Optionally, the transmission configuration of the first to-be-transmitted data carried by the first subcarrier and the transmission configuration of the first to-be-transmitted data carried by the second subcarrier satisfy at least one of the following three relationships:

[0013] Firstly, the transmission configuration includes spectral power density, and the spectral power density of the first to-be-transmitted data carried by the first subcarrier is lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier;

[0014] The transmission configuration includes a modulation format, and the modulation format of the first to-be-transmitted data carried by the first subcarrier is higher in spectral efficiency than the modulation format of the first to-be-transmitted data carried by the second subcarrier.

[0015] The transmission configuration includes a modulation format, and the modulation format of the first to-be-transmitted data carried by the first subcarrier is higher in spectral efficiency than the modulation format of the first to-be-transmitted data carried by the second subcarrier.

[0016] When the transmission configuration of the first to-be-transmitted data carried by the first subcarrier and the transmission configuration of the first to-be-transmitted data carried by the second subcarrier satisfy the first relationship, since the greater the spectral power density, the better the transmission performance, the transmission performance of the first to-be-transmitted data carried by the first subcarrier is better than the transmission performance of the first to-be-transmitted data carried by the second subcarrier under the same channel quality. In this way, in the case that the channel quality of the first subcarrier is better than the channel quality of the second subcarrier, the gap between the transmission performance of the first to-be-transmitted data carried by the first subcarrier and the transmission performance of the first to-be-transmitted data carried by the second subcarrier can be reduced.

[0017] When the transmission configuration of the first to-be-transmitted data carried by the first subcarrier and the transmission configuration of the first to-be-transmitted data carried by the second subcarrier satisfy the second relationship, since the greater the error correction performance of the encoding mode, the better the transmission performance, the transmission performance of the first to-be-transmitted data carried by the first subcarrier is better than the transmission performance of the first to-be-transmitted data carried by the second subcarrier under the same channel quality. In this way, in the case that the channel quality of the first subcarrier is better than the channel quality of the second subcarrier, the gap between the transmission performance of the first to-be-transmitted data carried by the first subcarrier and the transmission performance of the first to-be-transmitted data carried by the second subcarrier can be reduced.

[0018] When the transmission configuration of the first to-be-transmitted data carried by the first subcarrier and the transmission configuration of the first to-be-transmitted data carried by the second subcarrier satisfy the third relationship, since the greater the spectral efficiency of the modulation format, the better the transmission performance. The transmission performance of the first to-be-transmitted data carried by the first subcarrier is better than the transmission performance of the first to-be-transmitted data carried by the second subcarrier under the same channel quality. In this way, in the case that the channel quality of the first subcarrier is better than the channel quality of the second subcarrier, the gap between the transmission performance of the first to-be-transmitted data carried by the first subcarrier and the transmission performance of the first to-be-transmitted data carried by the second subcarrier can be reduced.

[0019] In some examples, the transmission configuration includes an encoding mode, and the first sub-carrier and the third sub-carrier carry first to-be-transmitted data encoded by a cascade forward error correction (CFEC) encoding mode, and the second sub-carrier and the fourth sub-carrier carry first to-be-transmitted data encoded by an open forward error correction (OFEC) encoding mode. Since the error correction performance of OFEC is better than that of CFEC, for the first to-be-transmitted data carried by the second sub-carrier and the fourth sub-carrier located in the edge area with poor channel quality, OFEC is used for encoding, which is beneficial to improving the transmission performance of the first to-be-transmitted data carried by the second sub-carrier and the fourth sub-carrier. In addition, for the first to-be-transmitted data carried by the first sub-carrier and the third sub-carrier located in the middle area with good channel quality, CFEC is used for encoding, which can reduce power consumption while ensuring transmission quality.

[0020] Optionally, when the channel quality corresponding to the second sub-carrier and the fourth sub-carrier is the same, the transmission configuration of the first to-be-transmitted data carried by the second sub-carrier is the same as the transmission configuration of the first to-be-transmitted data carried by the fourth sub-carrier; and when the channel quality corresponding to the second sub-carrier and the fourth sub-carrier is different, the transmission configuration of the first to-be-transmitted data carried by the second sub-carrier is different from the transmission configuration of the first to-be-transmitted data carried by the fourth sub-carrier.

[0021] In this application, the channel quality can be represented by a signal-to-noise ratio, the higher the signal-to-noise ratio, the better the channel quality; the lower the signal-to-noise ratio, the worse the channel quality. The same channel quality can mean that the difference between the signal-to-noise ratios is less than a set signal-to-noise ratio threshold. In addition, in this application, the transmission performance can be represented by a bit error rate, the larger the bit error rate, the worse the transmission performance; the smaller the bit error rate, the better the transmission performance.

[0022] Optionally, the method further includes: generating a second to-be-transmitted data; carrying the second to-be-transmitted data by a second optical carrier to obtain a second optical signal, the center frequency of the second optical carrier being the same as the center frequency of the first optical carrier; and sending the second optical signal through the first interface, the first interface having a second interface rate, the second interface rate being less than the first interface rate.

[0023] In this application, the first interface supports both the first interface rate and the second interface rate, so that the optical signal sending method can support switching at different interface rates.

[0024] In some examples, the sum of the data transmission rates of the multiple first to-be-transmitted data is twice the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is twice the spectral width of the first sub-carrier.

[0025] In some examples, the sum of the data transmission rates of the plurality of first to-be-transmitted data is four times the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

[0026] In a first possible implementation, the first interface rate is equal to the sum of the data transmission rates of the plurality of first to-be-transmitted data. In this case, the optical signal transmitted through the first interface includes only the first optical signal and no other optical signal. For example, the first interface rate is 1.6 Tb / s, and the first to-be-transmitted data is four paths, each of which has a data transmission rate of 400 Gb / s. In this case, the channel quality corresponding to the second subcarrier and the fourth subcarrier is the same.

[0027] In a second possible implementation, the first interface rate is greater than the sum of the data transmission rates of the plurality of first to-be-transmitted data. In this case, the optical signal transmitted through the first interface includes not only the first optical signal but also other optical signals. In this way, the overall data transmission rate can be further improved. In this case, the channel quality corresponding to the second subcarrier and the fourth subcarrier can be the same or different.

[0028] Optionally, the method further includes: generating a plurality of third to-be-transmitted data, the data transmission rates of the plurality of third to-be-transmitted data being the same, and transmission configurations of at least two of the plurality of third to-be-transmitted data being different; carrying the plurality of third to-be-transmitted data by using a third optical carrier to obtain a third optical signal, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier being greater than or equal to a spectral width of the first optical carrier, the third optical carrier including a plurality of subcarriers, each of the subcarriers in the third optical carrier carrying one of the plurality of third to-be-transmitted data; and transmitting the third optical signal through the first interface. That is, the optical signal transmitted through the first interface includes the first optical signal and the third optical signal, so that a higher first interface rate can be obtained.

[0029] In this case, if the optical signal transmitted through the first interface includes only the first optical signal and the third optical signal, the first interface rate is equal to the sum of the data transmission rates of the plurality of first to-be-transmitted data and the data transmission rates of the plurality of third to-be-transmitted data. For example, the first interface rate is 3.2 Tb / s, and the first to-be-transmitted data and the third to-be-transmitted data are both four paths, each of the first to-be-transmitted data has a data transmission rate of 400 Gb / s, and each of the third to-be-transmitted data has a data transmission rate of 400 Gb / s.

[0030] Optionally, the third optical carrier comprises a fifth subcarrier, a sixth subcarrier, a seventh subcarrier and an eighth subcarrier. The carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are symmetrical about the center frequency of the third optical carrier, the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier are symmetrical about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are both located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier. The transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier is the same as the transmission configuration of the third to-be-transmitted data carried by the seventh subcarrier, and the transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier is different from the transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier.

[0031] Optionally, the transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier is different from the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier. The transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier is the same as or different from the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier.

[0032] Optionally, the frequency range of the fourth subcarrier and the frequency range of the sixth subcarrier are both located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, the spectral power density of the first to-be-transmitted data carried by the fourth subcarrier and the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier are both lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier, and / or the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the fourth subcarrier and the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier are both higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier.

[0033] Since the channel quality corresponding to the fourth subcarrier and the sixth subcarrier is better than the channel quality corresponding to the second subcarrier, by reducing the spectral power density of the third to-be-transmitted data carried by the fourth subcarrier and the sixth subcarrier and / or increasing the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the fourth subcarrier and the sixth subcarrier relative to the second subcarrier, the transmission performance corresponding to the fourth subcarrier and the sixth subcarrier is improved, which is conducive to making the transmission performance corresponding to each subcarrier the same.

[0034] Optionally, since the channel quality corresponding to the fourth subcarrier is the same as the channel quality corresponding to the sixth subcarrier, the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier is the same as the transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier.

[0035] If a higher first interface rate needs to be supported, for example, 4.8 Tb / s or 6.4 Tb / s, etc., the optical signal transmitted through the first interface can further include more optical signals. For example, the optical signal transmitted through the first interface further includes a fourth optical signal, and the optical carrier of the fifth optical signal includes a plurality of subcarriers, each of which carries a fourth to-be-transmitted data. The transmission configuration of the optical carrier of the fifth optical signal and the fourth to-be-transmitted data is the same as that of the first optical carrier and the first to-be-transmitted data.

[0036] In a second aspect, an optical signal receiving method is provided, which includes: receiving a first optical signal through a second interface, wherein a first optical carrier of the first optical signal includes a plurality of subcarriers, each of the subcarriers in the first optical carrier carries a first received data, and the data transmission rate of each of the subcarriers in the first optical carrier is the same, at least two of the subcarriers in the first optical carrier carry the first received data with different transmission configurations, the transmission configuration includes at least one of a modulation format, a coding mode and a spectral power density, and the second interface has a first interface rate; and obtaining a plurality of the first received data based on the first optical signal.

[0037] Exemplarily, the method can be performed by a coherent optical module, for example, implemented by a receiver in the coherent optical module. The second interface is an entrance of the coherent optical module. It should be noted that when the coherent optical module adopts single-fiber bidirectional transmission, the entrance and an exit of the coherent optical module are the same.

[0038] Optionally, the first optical carrier includes a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetric about the center frequency of the first optical carrier, the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier are symmetric about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both located between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier. The transmission configuration of the first received data carried by the first subcarrier is the same as that of the first received data carried by the third subcarrier, and the transmission configuration of the first received data carried by the first subcarrier is different from that of the first received data carried by the second subcarrier.

[0039] Optionally, the transmission configuration of the first received data carried by the first sub-carrier and the transmission configuration of the first received data carried by the second sub-carrier satisfy at least one of the following relationships: the transmission configuration comprises spectral power density, the spectral power density of the first received data carried by the first sub-carrier is lower than the spectral power density of the first received data carried by the second sub-carrier; the transmission configuration comprises encoding mode, the error correction performance of the encoding mode of the first received data carried by the first sub-carrier is lower than the error correction performance of the encoding mode of the first received data carried by the second sub-carrier; the transmission configuration comprises modulation format, the modulation format of the first received data carried by the first sub-carrier corresponds to a spectral efficiency higher than the spectral efficiency of the modulation format of the first received data carried by the second sub-carrier.

[0040] Optionally, the transmission configuration comprises encoding mode, the encoding mode of the first received data carried by the first sub-carrier and the third sub-carrier is all concatenated forward error correction coding (CFEC), and the encoding mode of the first received data carried by the second sub-carrier and the fourth sub-carrier is all open forward error correction coding (OFEC).

[0041] Optionally, the method further comprises: receiving a second optical signal through the second interface, the second optical signal carrying second received data on a second optical carrier, the center frequency of the second optical carrier being the same as the center frequency of the first optical carrier, the data transmission rate of the second received data being less than the sum of the data transmission rates of the multiple first received data, the second interface having a second interface rate, the second interface rate being less than the first interface rate; and obtaining the second received data based on the second optical signal.

[0042] In some examples, the sum of the data transmission rates of the multiple first received data is twice the data transmission rate of the second received data, and the spectral width of the second optical carrier is twice the spectral width of the first sub-carrier.

[0043] In other examples, the sum of the data transmission rates of the multiple first received data is four times the data transmission rate of the second received data, and the spectral width of the second optical carrier is equal to the spectral width of the first sub-carrier.

[0044] Optionally, the method further comprises: receiving, through the second interface, a third optical signal, a third optical carrier of the third optical signal carrying a plurality of third received data, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier being greater than or equal to a spectral width of the first optical carrier, the third optical carrier comprising a plurality of subcarriers, each of the subcarriers in the third optical carrier carrying one of the plurality of third received data, data transmission rates of the plurality of third received data being the same, and transmission configurations of at least two of the plurality of third received data being different; and obtaining the plurality of third received data based on the third optical signal.

[0045] Optionally, the third optical carrier comprises a fifth subcarrier, a sixth subcarrier, a seventh subcarrier and an eighth subcarrier, a transmission configuration of third received data carried by the seventh subcarrier being the same as a transmission configuration of third received data carried by the fifth subcarrier; a carrier frequency of the seventh subcarrier and a carrier frequency of the fifth subcarrier being symmetric about a center frequency of the third optical carrier, a carrier frequency of the eighth subcarrier and a carrier frequency of the sixth subcarrier being symmetric about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier both being located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier.

[0046] Optionally, a frequency range of the sixth subcarrier is located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, a spectral power density of third received data carried by the sixth subcarrier being lower than a spectral power density of first received data carried by the second subcarrier, and / or a spectral efficiency of a modulation format of the third received data carried by the sixth subcarrier being higher than a spectral efficiency of a modulation format of the first received data carried by the second subcarrier.

[0047] Optionally, the first interface rate is 1.6 Tb / s, and a data transmission rate of each of the first received data is 400 Gb / s.

[0048] The optical signal receiving method provided by the second aspect is a receiving method corresponding to the optical signal transmitting method provided by the first aspect, and thus the transmission configuration of each of the received data is the same as the transmission configuration of the corresponding transmitted data, and the same effect can be achieved. Details are omitted.

[0049] In a third aspect, an optical communication apparatus is provided. The optical communication apparatus comprises a processor, an optical source and an optical modulator. The processor is configured to generate a plurality of first to-be-transmitted data, wherein the plurality of first to-be-transmitted data have a same data transmission rate, and transmission configurations of at least two of the plurality of first to-be-transmitted data are different, the transmission configurations comprising at least one of a modulation format, a coding mode and a spectral power density. The optical source is configured to provide a first optical carrier. The optical modulator is configured to carry the plurality of first to-be-transmitted data on the first optical carrier to obtain a first optical signal, wherein the first optical carrier comprises a plurality of subcarriers, each of the subcarriers of the first optical carrier carries one of the plurality of first to-be-transmitted data, and the first optical signal is transmitted through a first interface, wherein the first interface has a first interface rate.

[0050] Optionally, the processor is further configured to generate a second to-be-transmitted data. The optical source is further configured to provide a second optical carrier, wherein a center frequency of the second optical carrier is the same as a center frequency of the first optical carrier. The optical modulator is further configured to carry the second to-be-transmitted data on the second optical carrier to obtain a second optical signal, and transmit the second optical signal through the first interface, wherein the first interface has a second interface rate, and the second interface rate is less than the first interface rate.

[0051] Optionally, the processor is further configured to generate a plurality of third to-be-transmitted data, wherein the plurality of third to-be-transmitted data have a same data transmission rate, and transmission configurations of at least two of the plurality of third to-be-transmitted data are different. The optical source is further configured to provide a third optical carrier, wherein a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier is greater than or equal to a spectral width of the first optical carrier, and the third optical carrier comprises a plurality of subcarriers. The optical modulator is further configured to carry the plurality of third to-be-transmitted data on the third optical carrier to obtain a third optical signal, and transmit the third optical signal through the first interface, wherein each of the subcarriers of the third optical carrier carries one of the plurality of third to-be-transmitted data.

[0052] In the third aspect, the first optical carrier, the second optical carrier, the third optical carrier, the first to-be-transmitted data, the second to-be-transmitted data, the third to-be-transmitted data, the first interface rate and the second interface rate can refer to the foregoing first aspect.

[0053] In a fourth aspect, an optical communication apparatus is provided. The optical communication apparatus comprises a processor and an optical demodulator. The optical demodulator is configured to receive, through a second interface, a first optical signal, a first optical carrier of the first optical signal comprising a plurality of subcarriers, each of the subcarriers in the first optical carrier carrying a first received data, and a data transmission rate of each of the first received data carried by the subcarriers in the first optical carrier being the same, at least two of the first received data carried by the subcarriers in the first optical carrier having different transmission configurations, the transmission configurations comprising at least one of a modulation format, a coding scheme and a spectral power density, the second interface having a first interface rate; and obtain, based on the first optical signal, a plurality of the first received data. The processor is configured to process the plurality of the first received data.

[0054] Optionally, the optical demodulator is further configured to receive, through the second interface, a second optical signal, a second optical carrier of the second optical signal carrying a second received data, a center frequency of the second optical carrier being the same as a center frequency of the first optical carrier, a data transmission rate of the second received data being less than a sum of data transmission rates of the plurality of the first received data, the first interface having a second interface rate, the second interface rate being less than the first interface rate; and obtain, based on the second optical signal, the second received data.

[0055] Optionally, the optical demodulator is further configured to receive, through the second interface, a third optical signal, a third optical carrier of the third optical signal carrying a plurality of third received data, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier being greater than or equal to a spectral width of the first optical carrier, the third optical carrier comprising a plurality of subcarriers, each of the subcarriers in the third optical carrier carrying one of the plurality of the third received data, data transmission rates of the plurality of the third received data being the same, and at least two of the plurality of the third received data having different transmission configurations; and obtain, based on the third optical signal, the plurality of the third received data.

[0056] In the fourth aspect, the first optical carrier, the second optical carrier, the third optical carrier, the first received data, the second received data, the third received data, the first interface rate and the second interface rate can refer to the related content of the second aspect.

[0057] In a fifth aspect, an optical signal transmitting apparatus is provided, which has the function of implementing the method of the first aspect or any of the optional manners of the first aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the above functions.

[0058] In a sixth aspect, an optical signal receiving apparatus is provided, which has a function of implementing the method of the second aspect or any of the optional modes of the second aspect. The function can be implemented by hardware or by execution of corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0059] In a seventh aspect, an optical communication system is provided, which includes a sending device and a receiving device. The sending device is configured to perform the optical signal sending method of the first aspect or any of the optional modes of the first aspect. The receiving device is configured to perform the optical signal receiving method of the second aspect or any of the optional modes of the second aspect.

[0060] In an eighth aspect, a chip is provided, which includes a processor and a communication interface. The processor is configured to execute instructions to cause the chip to perform the optical signal sending method of the first aspect or any of the optional modes of the first aspect, or perform the optical signal receiving method of the second aspect or any of the optional modes of the second aspect.

[0061] In a ninth aspect, a computer device is provided, which includes a processor and a memory. The processor is configured to execute instructions stored in the memory to cause the computer device to perform the method of the first aspect or the second aspect.

[0062] Optionally, the processor is one or more, and the processor is a multi-core processor, and the memory is one or more.

[0063] Optionally, the memory can be integrated with the processor, or the memory and the processor are separately arranged.

[0064] In a specific implementation process, the memory can be a non-transitory memory, such as a read only memory (ROM), which can be integrated on the same chip with the processor, or can be separately arranged on different chips. The type of the memory and the arrangement mode of the memory and the processor are not limited in the present application.

[0065] In a tenth aspect, a computer readable storage medium is provided, which stores at least one instruction. The instruction is loaded and executed by a computer device to cause the computer device to implement the method of the first aspect or the second aspect.

[0066] In an eleventh aspect, a computer program (product) is provided, which includes computer program code, which, when executed by a computer device, causes the computer device to perform the method of the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0067] FIG. 1 is a structural schematic diagram of an optical communication system according to an embodiment of the present application;

[0068] FIG. 2 is a flowchart of an optical signal sending method according to an embodiment of the present application;

[0069] FIG. 3 is a schematic diagram of an optical signal sent by the optical signal sending method according to an embodiment of the present application;

[0070] FIG. 4 is a schematic diagram of another optical signal sent by the optical signal sending method according to an embodiment of the present application;

[0071] FIG. 5 is a schematic diagram of still another optical signal sent by the optical signal sending method according to an embodiment of the present application;

[0072] FIG. 6 is a flowchart of an optical signal receiving method according to an embodiment of the present application;

[0073] FIG. 7 is a structural schematic diagram of an optical signal sending device according to an embodiment of the present application;

[0074] FIG. 8 is a structural schematic diagram of an optical signal receiving device according to an embodiment of the present application;

[0075] FIG. 9 is a structural schematic diagram of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0076] In order to facilitate understanding of the embodiments of the present application, some professional terms related to the embodiments of the present application are explained first.

[0077] Forward error correction (FEC): The transmitter adds a series of redundant bits (called overhead) to the transmitted data stream. The receiver can use the overhead to check for errors without requiring the transmitter to resend the data. FEC can make coherent links more tolerant to noise than direct detection systems and enable longer distances and higher capacities.

[0078] Coherent detection: the optical signal is split into two orthogonally polarized optical signals by a polarization beam splitter. Similarly, the local oscillator light is also split into two orthogonally polarized local oscillator lights by a polarization beam splitter. The optical signal and the local oscillator light pass through a 180-degree mixer to obtain two mixed optical signals with a phase difference of 180 degrees. After photoelectric conversion by a photodetector, an intermediate frequency (IF) electrical signal is output. The intermediate frequency electrical signal is envelope-detected to recover the baseband signal, and finally a decision is made to recover the data.

[0079] Spectral power density: the proportion of energy of a signal at different frequencies.

[0080] PCS: In digital communication, a constellation is a graphical representation of a modulation format, usually used to describe the modulation symbols and their corresponding phases and amplitudes of different modulation formats. In high-order modulation, due to the increase in the number of modulation symbols, the density of the constellation also increases. Probability shaping is an effective constellation shaping method that can improve channel transmission performance by adjusting the positions and densities of constellation points to achieve the purpose of increasing channel capacity. For example, the positions of QAM signal constellation points remain unchanged, and the probabilities of some constellation points change, resulting in non-uniform distribution, which is called probability shaping.

[0081] Spectral efficiency: the bit rate of optical signals carried in a unit optical frequency range. The higher the spectral efficiency, the greater the bit rate of optical signals carried in a unit optical frequency range. Conversely, the lower the spectral efficiency, the lower the bit rate of optical signals carried in a unit optical frequency range.

[0082] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0083] FIG. 1 is a structural schematic diagram of an optical communication system according to an embodiment of the present application. As shown in FIG. 1, the optical communication system includes a transmitting device, a receiving device, and an optical transmission link connecting the transmitting device and the receiving device. The transmitting device is configured to transmit an optical signal to the receiving device through the optical transmission link.

[0084] The optical communication system can be applied to various optical transmission networks, such as backbone networks, metropolitan area networks, access networks, and data center interconnects (DCI), etc.

[0085] The transmitting device includes a transmitter, and the transmitter includes a processor, a digital-to-analog converter (DAC), a light source, and an optical modulator.

[0086] The processor is configured to generate to-be-transmitted data based on an input data stream. Here, the input data stream can be received by the processor from a serializer / deserializer (SERDES). The to-be-transmitted data can be first to-be-transmitted data, second to-be-transmitted data, third to-be-transmitted data, and the like. The processor performs FEC encoding on the input data stream, and maps the FEC-encoded input data stream to data symbols according to a modulation format to generate an encoded digital signal, thereby obtaining the to-be-transmitted data. The FEC encoding mode includes, but is not limited to, CFEC, OFEC, and higher-performance FEC, and the like. The modulation format includes, but is not limited to, polarization-multiplexed binary phase-shift keying (PM-BPSK), polarization-multiplexed quadrature phase-shift keying (PM-QPSK), polarization-multiplexed 8-quadrature amplitude modulation (PM-8QAM), polarization-multiplexed 16QAM (PM-16QAM), or probability constellation shaping-QAM (PCS-QAM), and the like. The processor can also be configured to control the spectral power density of the encoded digital signal, for example, by increasing the amplitude of the digital signal to increase the spectral power density or reducing the amplitude of the digital signal to reduce the spectral power density.

[0087] Exemplarily, the processor can be a digital signal processor (DSP), or a single-core or multi-core central processor, or one or more integrated circuits.

[0088] The DAC is configured to convert the digital signal into an analog electrical signal. Here, the number of DACs can be selected according to the bandwidth and other conditions of the DAC, which is not limited in the embodiments of the present application.

[0089] The light source is configured to provide an optical carrier. The optical carrier includes two orthogonal linear polarization components: an X polarization component and a Y polarization component. The two polarization components can include the same optical carrier frequency, which corresponds to the wavelength of the optical carrier provided by the light source. The optical carrier herein can be any of the optical carriers described below, such as the first optical carrier, the second optical carrier, the third optical carrier, the fourth optical carrier, and the fifth optical carrier, etc. In some examples, the light source includes a laser. The embodiments of the present application do not limit the type of laser, for example, a directly modulated laser, an electro-absorption modulated laser, a distributed feedback laser, and the like.

[0090] The optical modulator (also referred to as an electro-optical converter) is configured to modulate analog electrical signals onto the optical carrier provided by the light source to obtain an optical signal.

[0091] Optionally, the optical modulator includes a modulator and a polarization beam combiner (PBC). The modulator is configured to modulate four analog electrical signals onto the X polarization component and the Y polarization component of the optical carrier, respectively, wherein each polarization component includes two orthogonal phase components: an in-phase (I) component and a quadrature-phase (Q) component, thereby obtaining four modulated optical signals. The four modulated optical signals are Ix modulated optical signal, Qx modulated optical signal, Iy modulated optical signal, and Qy modulated optical signal, respectively. Exemplarily, the modulator includes, but is not limited to, a Mach Zehnder modulator (MZM), and the like. The PBC is configured to combine the four modulated optical signals into one modulated optical signal and output the modulated optical signal to the optical transmission link through a first interface. The first interface is an optical output port of the transmitter.

[0092] The receiving device includes a receiver, which includes an optical demodulator and a processor. The optical demodulator is configured to receive the optical signal from the optical transmission link through a second interface and obtain received data based on the optical signal. The processor is configured to process the received data, for example, to demodulate and perform FEC decoding on the received data, etc. The second interface is an optical input port of the receiver.

[0093] Optionally, the optical demodulator includes a local laser, a polarization beam split (PBS), an optical mixer, and an optical-electric converter. The local laser is configured to provide a local optical signal. The PBS is configured to split the received optical signal and the local optical signal into two orthogonal linear polarization components: an X polarization component and a Y polarization component. The optical mixer is configured to mix the received optical signal and the local optical signal and output a mixed optical signal with multiple linear polarization components. The optical-electric converter is configured to perform optical-electric conversion on the mixed optical signal output by the optical mixer to obtain multiple analog electrical signals.

[0094] Optionally, the receiver further comprises an analog-to-digital converter (ADC). The ADC is configured to convert the analog electrical signal output by the photoelectric transducer into a digital signal and send the digital signal to the processor.

[0095] To realize bidirectional transmission, the transmitting device further comprises a receiver, and the receiving device further comprises a transmitter. The receiver of the transmitting device and the receiver of the receiving device have the same structure, and the transmitter of the receiving device and the transmitter of the transmitting device have the same structure, which will not be described in detail herein.

[0096] The transmitter and the receiver of the transmitting device can be integrated into one optical module, and the transmitter and the receiver of the receiving device can also be integrated into one optical module. Since the aforementioned receiver adopts the coherent detection manner to obtain the received data, the receiver can be referred to as a coherent receiver, and accordingly, the optical module integrated with the transmitter and the coherent receiver can be referred to as a coherent optical module.

[0097] When the coherent optical module adopts single-fiber bidirectional transmission, the light outlet of the transmitter and the light inlet of the receiver in the same coherent optical module are the same optical interface. Moreover, in the same coherent optical module, some devices of the transmitter and the receiver can be shared to reduce the volume of the coherent optical module and reduce the cost. For example, the light source in the transmitter and the local oscillator laser in the receiver can be the same laser; in addition, the transmitter and the receiver can share a SERDER.

[0098] With the continuous increase of the transmission rate, the transmission rate supported by the coherent optical module develops from 400 Gb / s, 800 Gb / s to 1 Tb / s or more, for example, 1.6 Tb / s or more than 1.6 Tb / s. Therefore, the embodiments of the present application provide an optical signal sending and receiving method supporting a high transmission rate and related apparatus.

[0099] FIG. 2 is a flow diagram of a signal sending method provided by an embodiment of the present application. The method can be performed by the aforementioned transmitting device, for example, by the aforementioned coherent optical module (transmitter) of the transmitting device. As shown in FIG. 2, the signal sending method comprises:

[0100] 201: generating a plurality of first to-be-transmitted data.

[0101] The data transmission rates of the plurality of first to-be-transmitted data are the same. The data transmission rate can be expressed by a bit rate. Here, the data transmission rates being the same can mean that the bit rates are exactly the same, or the difference between the bit rates is within a set difference range, or the data transmission rates are in the same rate level. For example, the data transmission rates of each of the first to-be-transmitted data are 400 Gb / s, or 200 Gb / s, etc.

[0102] The plurality of first to-be-transmitted data can be obtained based on input data received by the SERDES. The input data is a binary bit sequence, and the input data can be an original information sequence received from a client-side device (such as a service board or the like).

[0103] The input data can be one or more, and the data rate of each input data can be the same as or different from the data transmission rate of the first to-be-transmitted data.

[0104] For example, the data rate of each input data is less than the data transmission rate of the first to-be-transmitted data. In this case, the data transmission rate of each first to-be-transmitted data can be an integer multiple of the data rate of each input data, so as to generate the plurality of first to-be-transmitted data based on the input data. For example, the data transmission rate of each first to-be-transmitted data is 400 Gb / s, and the data rate of each input data is 50 Gb / s, so that one first to-be-transmitted data can be generated based on eight input data.

[0105] The transmission configurations of at least two of the plurality of first to-be-transmitted data are different. Here, the transmission configurations can be different in part or in all.

[0106] Optionally, the transmission configuration includes at least one of a modulation format, a coding mode, and a spectral power density.

[0107] In the embodiment of the present application, 201 includes: merging the received plurality of input data into an input data stream by the SERDES; and dividing the input data stream into a plurality of data sequences, each data sequence being used to generate one first to-be-transmitted data. For example, each data sequence is first FEC encoded, and then the FEC encoded data sequence is constellation mapped according to a modulation format to obtain a plurality of data symbols, and the plurality of data symbols constitute one first to-be-transmitted data. Optionally, 201 further includes adjusting the amplitude of the data symbols in one or more data sequences, thereby adjusting the spectral power density of the corresponding first to-be-transmitted data.

[0108] 202: carries the plurality of first to-be-transmitted data by using a first optical carrier to obtain a first optical signal.

[0109] The first optical carrier includes a plurality of subcarriers, each subcarrier carrying one first to-be-transmitted data, and different subcarriers carrying different first to-be-transmitted data.

[0110] As described above, the transmission configurations of the at least two paths of first to-be-transmitted data are different, and therefore the first optical carrier includes at least a first subcarrier and a second subcarrier, the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier.

[0111] The following exemplary describes several cases of different transmission configurations, taking the transmission configuration including modulation format, coding mode and spectral power density as an example.

[0112] The transmission configuration of the first to-be-transmitted data carried by the first subcarrier is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier, and there are several cases as follows.

[0113] Firstly, the modulation format of the first to-be-transmitted data carried by the first subcarrier is different from the modulation format of the first to-be-transmitted data carried by the second subcarrier.

[0114] For example, the modulation format of the first to-be-transmitted data carried by the first subcarrier is DP-16QAM, and the modulation format of the first to-be-transmitted data carried by the second subcarrier is PCS-16QAM. For another example, the modulation format of the first to-be-transmitted data carried by the first subcarrier is DP-16QAM, and the modulation format of the first to-be-transmitted data carried by the second subcarrier is PCS-64QAM. The modulation format of the first to-be-transmitted data carried by the first subcarrier and the second subcarrier can be selected as needed.

[0115] When the modulation formats are different, the spectral efficiency of the subcarriers is different. When the spectral efficiency is higher, the transmission performance of the subcarrier is relatively poor, and when the spectral efficiency is lower, the transmission performance of the subcarrier is relatively high. Therefore, by flexibly selecting the modulation format of the first to-be-transmitted data carried by the first subcarrier and the second subcarrier, the transmission performance of the subcarriers can be adjusted relatively to adapt to different scenarios.

[0116] For example, in the case that the channel quality in the frequency range where the first subcarrier and the second subcarrier are located is the same, different modulation formats can be used to make the transmission performance corresponding to the first subcarrier and the transmission performance corresponding to the second subcarrier different. For another example, in the case that the channel quality in the frequency range where the first subcarrier and the second subcarrier are located is different, the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the subcarrier with better channel quality is higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the subcarrier with poorer channel quality, which can make the transmission performance corresponding to the first subcarrier and the transmission performance corresponding to the second subcarrier basically consistent.

[0117] In the embodiments of the present application, the channel quality can be represented by a signal-to-noise ratio, and the higher the signal-to-noise ratio, the better the channel quality; the lower the signal-to-noise ratio, the worse the channel quality. The same channel quality can mean that the difference between the signal-to-noise ratios is less than a set signal-to-noise ratio threshold. In addition, in the embodiments of the present application, the transmission performance can be represented by a bit error rate, and the greater the bit error rate, the worse the transmission performance; the smaller the bit error rate, the better the transmission performance. The substantially consistent transmission performance can mean that the bit error rates are the same, or the bit error rates are in the same order of magnitude, or the bit error rates are in the same set range.

[0118] It should be noted that, since the modulation format will affect the data transmission rate corresponding to the subcarrier, in order to make the data transmission rate corresponding to the first subcarrier and the data transmission rate corresponding to the second subcarrier the same, the spectral width of the first subcarrier and the second subcarrier can be adjusted correspondingly, so that the spectral width of the subcarrier corresponding to the modulation format with higher spectral efficiency is smaller, and the spectral width of the subcarrier corresponding to the modulation format with lower spectral efficiency is larger.

[0119] The second, the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier. For example, the encoding mode of the first to-be-transmitted data carried by the first subcarrier is CFEC, and the encoding mode of the first to-be-transmitted data carried by the second subcarrier is OFEC. For another example, the encoding mode of the first to-be-transmitted data carried by the first subcarrier is OFEC, and the encoding mode of the first to-be-transmitted data carried by the second subcarrier is an FEC encoding mode with better error correction performance. The encoding mode of the first to-be-transmitted data carried by the first subcarrier and the second subcarrier can be selected as needed.

[0120] The better the error correction performance of the encoding mode, the better the transmission performance of the subcarrier corresponding to the subcarrier. Therefore, by flexibly selecting the encoding mode of the first to-be-transmitted data carried by the first subcarrier and the second subcarrier, the transmission performance of the subcarrier can be adjusted relatively to adapt to different scenarios.

[0121] For example, in the case that the channel quality in the frequency range where the first subcarrier and the second subcarrier are located is the same, different encoding modes can be used to make the bit error rate corresponding to the first subcarrier and the bit error rate corresponding to the second subcarrier different. For another example, in the case that the channel quality in the frequency range where the first subcarrier and the second subcarrier are located is different, the error correction performance of the encoding mode of the first to-be-transmitted data carried by the subcarrier with better channel quality is lower than the error correction performance of the encoding mode of the first to-be-transmitted data carried by the subcarrier with worse channel quality, which can make the bit error rate corresponding to the first subcarrier and the bit error rate corresponding to the second subcarrier substantially consistent.

[0122] The third, the spectral power density of the first to-be-transmitted data carried by the first subcarrier is different from the spectral power density of the first to-be-transmitted data carried by the second subcarrier. For example, the spectral power density of the first to-be-transmitted data carried by the first subcarrier is less than the spectral power density of the first to-be-transmitted data carried by the second subcarrier. For another example, the spectral power density of the first to-be-transmitted data carried by the first subcarrier is greater than the spectral power density of the first to-be-transmitted data carried by the second subcarrier. The spectral power densities of the first to-be-transmitted data carried by the first subcarrier and the second subcarrier can be set as needed.

[0123] The higher the spectral power density, the better the transmission performance of the subcarrier. Therefore, by flexibly selecting the relationship between the spectral power density of the first to-be-transmitted data carried by the first subcarrier and the spectral power density of the first to-be-transmitted data carried by the second subcarrier, the transmission performance of the subcarrier can be adjusted relatively to adapt to different scenarios.

[0124] For example, in the case that the channel quality in the frequency range where the first subcarrier and the second subcarrier are located is the same, different spectral power densities can make the bit error rate corresponding to the first subcarrier and the bit error rate corresponding to the second subcarrier different. For another example, in the case that the channel quality in the frequency range where the first subcarrier and the second subcarrier are located is different, making the spectral power density of the first to-be-transmitted data carried by the subcarrier with better channel quality lower than the spectral power density of the first to-be-transmitted data carried by the subcarrier with poorer channel quality can make the bit error rate corresponding to the first subcarrier and the bit error rate corresponding to the second subcarrier basically consistent.

[0125] The fourth, the modulation format of the first to-be-transmitted data carried by the first subcarrier is different from the modulation format of the first to-be-transmitted data carried by the second subcarrier, and the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier.

[0126] The fourth mode is a combination of the first and second modes, which can more finely adjust the transmission performance corresponding to the first subcarrier and the second subcarrier.

[0127] The fifth, the modulation format of the first to-be-transmitted data carried by the first subcarrier is different from the modulation format of the first to-be-transmitted data carried by the second subcarrier, and the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier.

[0128] The fifth mode is a combination of the first and third modes, which can more finely adjust the transmission performance corresponding to the first subcarrier and the second subcarrier.

[0129] The sixth, the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier, and the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier.

[0130] The sixth mode is a combination of the second and third modes, which can more finely adjust the transmission performance corresponding to the first subcarrier and the second subcarrier.

[0131] The seventh, the modulation format of the first to-be-transmitted data carried by the first subcarrier is different from the modulation format of the first to-be-transmitted data carried by the second subcarrier, the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier, and the encoding mode of the first to-be-transmitted data carried by the first subcarrier is different from the encoding mode of the first to-be-transmitted data carried by the second subcarrier.

[0132] The seventh mode is a combination of the first to third modes, which can more finely adjust the transmission performance corresponding to the first subcarrier and the second subcarrier.

[0133] It should be noted that in the above seven possibilities, the same is not indicated for different other transmission configurations.

[0134] Optionally, the first optical carrier includes a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetric about the center frequency of the first optical carrier, the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier are symmetric about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both located between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier. That is, in the frequency domain, the first subcarrier and the third subcarrier are both located between the second subcarrier and the fourth subcarrier.

[0135] In the embodiments of the present application, the data transmission rates corresponding to the first subcarrier, the second subcarrier, the third subcarrier and the fourth subcarrier are all the same. That is, the data transmission rate corresponding to each subcarrier of the first optical carrier is the same. When the first optical carrier only includes the four subcarriers, the data transmission rate corresponding to the first optical carrier is the sum of the data transmission rates of the four subcarriers. For example, assuming that the data transmission rate corresponding to each subcarrier is 400 Gb / s, then the data transmission rate corresponding to the first optical carrier is 1.6 Tb / s.

[0136] In a possible implementation, the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is the same as the transmission configuration of the first to-be-transmitted data carried by the third subcarrier, the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier, and the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is also different from the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier.

[0137] In the embodiments of the present application, the transmission configuration of each subcarrier can be determined according to the channel quality corresponding to the subcarrier. Since the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are closer to the center frequency of the first optical carrier, the first subcarrier and the third subcarrier are located in the middle region of the channel, and the second subcarrier and the fourth subcarrier are located in the edge region of the channel. Due to limited bandwidth and other reasons, the channel quality in the middle region of the channel is better than the channel quality in the edge region of the channel. Therefore, in the embodiments of the present application, the transmission configuration of the first to-be-transmitted data carried by the first subcarrier located in the middle region of the channel is the same as the transmission configuration of the first to-be-transmitted data carried by the third subcarrier also located in the middle region of the channel; and the transmission configuration of the first to-be-transmitted data carried by the first subcarrier located in the middle region of the channel is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier and the fourth subcarrier located in the edge region of the channel.

[0138] Since the channel quality in the middle region is better than the channel quality in the edge region, if the transmission configurations corresponding to the subcarriers with carrier frequencies located in the middle region and the subcarriers with carrier frequencies located in the edge region are the same, there may be a case that the bit error rate of the data corresponding to the subcarriers in the edge region is higher than the bit error rate of the data corresponding to the subcarriers in the middle region. In order to keep the bit error rates of the subcarriers the same, the transmission configuration of the first to-be-transmitted data carried by the subcarrier (for example, the first subcarrier) in the middle region and the transmission configuration of the first to-be-transmitted data carried by the subcarrier (for example, the second subcarrier) in the edge region need to satisfy at least one of the following relationships:

[0139] Relationship A: the transmission configuration includes spectral power density, the spectral power density of the first to-be-transmitted data carried by the first subcarrier is lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier;

[0140] Relationship B: the transmission configuration includes an encoding mode, the error correction performance of the encoding mode of the first to-be-transmitted data carried by the first subcarrier is lower than the error correction performance of the encoding mode of the first to-be-transmitted data carried by the second subcarrier;

[0141] Relationship C: the transmission configuration includes a modulation format, the spectral efficiency corresponding to the modulation format of the first to-be-transmitted data carried by the first subcarrier is higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier.

[0142] Optionally, the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier is the same as the transmission configuration of the first to-be-transmitted data carried by the second subcarrier. When the channel quality corresponding to the fourth subcarrier and the second subcarrier is the same, the first to-be-transmitted data carried by the fourth subcarrier and the second subcarrier can adopt the same transmission configuration, so that the transmission performance of each first to-be-transmitted data can be kept consistent. For example, when the first interface sends the first optical signal without sending other optical signals, the channel is symmetrical about the center frequency of the first optical carrier, and the channel quality corresponding to the fourth subcarrier and the second subcarrier is the same.

[0143] In a possible implementation, all the subcarriers of the first optical carrier are provided by one laser, that is, all the subcarriers of the first optical carrier are one spectrally continuous light beam provided by one laser. The multiple first to-be-transmitted data are combined into one piece of data in the digital domain or the radio frequency domain, and then the one piece of data is modulated on the first optical carrier by one optical modulator to obtain the first optical signal.

[0144] In this implementation, the digital subcarrier multiplexing (DSCM) technology is used to obtain the first optical signal.

[0145] In another possible implementation, each subcarrier of the first optical carrier is provided by a different laser, each laser corresponds to one optical modulator, each first to-be-transmitted data is modulated on the subcarrier provided by the corresponding laser by one optical modulator to obtain multiple sub-optical signals; then, the multiple sub-optical signals are combined into one piece of data by one optical multiplexer to obtain the first optical signal.

[0146] In this implementation, the wavelength division multiplexing (WDM) technology is used to obtain the first optical signal.

[0147] In yet another possible implementation, the first subcarrier and the second subcarrier of the first optical carrier are provided by one laser, and the third subcarrier and the fourth subcarrier of the first optical carrier are provided by another laser, that is, the first subcarrier and the second subcarrier are one light beam, and the third subcarrier and the fourth subcarrier are another light beam. Each laser corresponds to one optical modulator. Each two first to-be-transmitted data are combined into one piece of data in the digital domain or the radio frequency domain, and then each piece of data is modulated on the light beam provided by one laser by one optical modulator to obtain multiple sub-optical signals; finally, the multiple sub-optical signals are combined into one piece of data by one optical multiplexer to obtain the first optical signal.

[0148] In this implementation, the first optical signal is obtained by combining the DSCM and the WDM.

[0149] 203: transmitting the first optical signal through the first interface.

[0150] The first interface has a first interface rate.

[0151] Exemplarily, the first interface is an optical output port of the optical module. The first interface can transmit the first optical signal through an optical transmission medium such as an optical fiber.

[0152] In some examples, when the first optical signal is transmitted through the first interface, no other optical signal is simultaneously transmitted from the first interface. In this case, the first interface rate is equal to the sum of the data transmission rates of the first to-be-transmitted data. For example, when the first optical carrier includes four subcarriers, the four subcarriers respectively carry one of the first to-be-transmitted data, and the data transmission rate of each of the first to-be-transmitted data is 400 Gb / s, the first interface rate is 1.6 Tb / s.

[0153] In the embodiments of the present application, by generating a plurality of first to-be-transmitted data, the data transmission rates of the plurality of first to-be-transmitted data are made the same, and the transmission configurations of at least two of the first to-be-transmitted data are made different, so that the data transmission performance of the at least two first to-be-transmitted data with different transmission configurations can be different to adapt to different scene requirements.

[0154] In the embodiments of the present application, the step 201 can be implemented by the processor in the transmitter, and the steps 202 and 203 can be implemented by the optical modulator in the transmitter.

[0155] In a possible implementation, the first interface can support a plurality of different interface rates, i.e., switching between different interface rates. In this case, the method can further include the following steps 204-206. It should be noted that the following steps 204-206 are executed at different times from the aforementioned steps 201-203.

[0156] 204: generating a second to-be-transmitted data.

[0157] The data transmission rate of the second to-be-transmitted data is less than the sum of the data transmission rates of the first to-be-transmitted data.

[0158] The second to-be-transmitted data is obtained based on the input data received through the SERDES, like the first to-be-transmitted data.

[0159] 205: carrying the second to-be-transmitted data by using a second optical carrier to obtain a second optical signal.

[0160] The center frequency of the second optical carrier is the same as the center frequency of the first optical carrier.

[0161] 206: transmitting the second optical signal through the first interface.

[0162] At this time, the first interface has a second interface rate, and the second interface rate is less than the first interface rate. If no other optical signal is transmitted from the first interface at the same time when the second optical signal is transmitted through the first interface, the second interface rate is equal to the data transmission rate of the second to-be-transmitted data. For example, the data transmission rate of the second to-be-transmitted data is 400 Gb / s, and the second interface rate is 400 Gb / s. For another example, the data transmission rate of the second to-be-transmitted data is 800 Gb / s, and the second interface rate is 800 Gb / s.

[0163] In the embodiments of the present application, the step 204 can be implemented by the processor in the transmitter, and the steps 205 and 206 can be implemented by the optical modulator in the transmitter.

[0164] In a possible implementation, the sum of the data transmission rates of the first to-be-transmitted data is twice the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier. For example, the sum of the data transmission rates of the first to-be-transmitted data is 1.6 Tb / s, and the data transmission rate of the second to-be-transmitted data is 800 Gb / s, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier.

[0165] Since the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetrical about the center frequency of the first optical carrier, and the center frequency of the second optical carrier is the same as the center frequency of the first optical carrier, the spectral width of the second optical carrier is the sum of the spectral width of the first subcarrier and the spectral width of the third subcarrier.

[0166] In another possible implementation, the sum of the data transmission rates of the first to-be-transmitted data is four times the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier. For example, the sum of the data transmission rates of the first to-be-transmitted data is 1.6 Tb / s, and the data transmission rate of the second to-be-transmitted data is 400 Gb / s, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

[0167] In some examples, the interface rate of the first interface can be switched between 1.6 Tb / s and 400 Gb / s. In other examples, the interface rate of the first interface can be switched between 1.6 Tb / s and 800 Gb / s. In yet other examples, the interface rate of the first interface can be switched between 1.6 Tb / s, 800 Gb / s and 400 Gb / s.

[0168] Optionally, the method further comprises: receiving a control instruction, the control instruction being used to indicate a target interface rate; and controlling the interface rate of the first interface according to the control instruction. Optionally, the control instruction can be sent by the client-side device.

[0169] The optical signal sent through the first interface is exemplarily described below in combination with FIG. 3. In FIG. 3, the interface rate of the first interface can be switched between 1.6 Tb / s, 800 Gb / s and 400 Gb / s. In FIG. 3, the direction indicated by the arrow is the direction in which the frequency gradually increases, and the direction perpendicular to the arrow represents the spectral power density.

[0170] As shown in part (a) of FIG. 3, when the interface rate of the first interface is 1.6 Tb / s, the first interface sends a first optical signal 1. The first optical carrier of the first optical signal 1 includes four subcarriers, which are a first subcarrier 11, a second subcarrier 12, a third subcarrier 13 and a fourth subcarrier 14. The data transmission rate corresponding to each subcarrier is 400 Gb / s, and the first interface rate of the first interface is equal to the sum of the data transmission rates corresponding to the four subcarriers of the first optical carrier.

[0171] Among them, the first subcarrier 11 and the third subcarrier 13 carry first to-be-transmitted data, and the encoding mode of the first to-be-transmitted data is CFEC; the second subcarrier 12 and the fourth subcarrier 14 carry first to-be-transmitted data, and the encoding mode of the first to-be-transmitted data is OFEC. That is, the error correction performance of the encoding mode of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 is better than that of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13.

[0172] Since the error correction performance of OFEC is better than that of CFEC, the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 located in the edge area with poor channel quality are encoded by OFEC, which is beneficial to improve the transmission performance of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14. For the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 located in the middle area with good channel quality, CFEC is used for encoding, which can reduce power consumption while ensuring transmission performance.

[0173] In addition, the size of the first subcarrier 11 and the third subcarrier 13 in the direction perpendicular to the arrow is greater than the size of the second subcarrier 12 and the fourth subcarrier 14 in the direction perpendicular to the arrow, so that the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is lower than that of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14, so as to further improve the transmission performance of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14.

[0174] When the interface rate of the first interface is 800 Gb / s, the first interface transmits the second optical signal 2, the second optical carrier of the second optical signal 2 carries the second to-be-transmitted data at a data transmission rate of 800 Gb / s, and the second to-be-transmitted data is encoded in the OFEC mode. Optionally, the spectral power density of the second to-be-transmitted data can be less than, equal to, or greater than the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11. For example, because the second optical carrier is located in the middle region of the channel, the channel quality is good, and the second to-be-transmitted data is encoded in the OFEC mode with better error correction performance, therefore, the spectral power density of the second to-be-transmitted data can be less than the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11, to ensure the consistency of transmission performance at different rates.

[0175] When the interface rate of the first interface is 400 Gb / s, the first interface transmits the second optical signal 2', the second optical carrier of the second optical signal 2' carries the second to-be-transmitted data at a data transmission rate of 400 Gb / s, the second to-be-transmitted data is encoded in the CFEC mode, and the spectral power density of the second to-be-transmitted data is equal to the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11.

[0176] In the (a) part of FIG. 3, the modulation formats of the first to-be-transmitted data of each path are the same, for example, all are DP-16QAM, so that the modulation format of the second to-be-transmitted data can also be the same.

[0177] In this way, in addition to supporting the interface rate of 1.6 Tb / s, the embodiment of the present application can also be backward compatible with 400G-ZR and 800G-ZR.

[0178] As shown in the (b) part of FIG. 3, the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 are both encoded in the CFEC mode; and the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 are both encoded in the OFEC mode. That is, the error correction performance of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 is better than the error correction performance of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13.

[0179] In addition, the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14.

[0180] And, the modulation format of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is DP-16QAM, and the modulation format of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 is PCS-QAM (for example, PCS-16QAM). That is, the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14.

[0181] In FIG. 3, PO is used to represent the case where the modulation format is PCS-QAM and the encoding mode is OFEC.

[0182] When the interface rate of the first interface is 800 Gb / s, the first interface transmits the second optical signal 2, the second optical carrier of the second optical signal 2 carries the second to-be-transmitted data, the encoding mode of the second to-be-transmitted data is OFEC, the modulation format is PCS-QAM, and the spectral power density of the second to-be-transmitted data is equal to or greater than the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11.

[0183] When the interface rate of the first interface is 400 Gb / s, the first interface transmits the second optical signal 2', the second optical carrier of the second optical signal 2' carries the second to-be-transmitted data, the encoding mode of the second to-be-transmitted data is CFEC, the modulation format is DP-16QAM, and the spectral power density of the second to-be-transmitted data is equal to the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11.

[0184] In this way, in addition to supporting the interface rate of 1.6 Tb / s, the embodiments of the present application can be backward compatible with 400G-ZR+ and 800G-ZR+.

[0185] As shown in part (c) of FIG. 3, the encoding mode of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is CFEC; and the encoding mode of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 is OFEC. That is, the error correction performance of the encoding mode of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 is superior to the error correction performance of the encoding mode of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13.

[0186] The modulation format of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is DP-16QAM, and the modulation format of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14 is PCS-QAM. That is, the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the first subcarrier 11 and the third subcarrier 13 is higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier 12 and the fourth subcarrier 14.

[0187] The spectral power densities of the first to-be-transmitted data carried by the first subcarrier 11, the second subcarrier 12, the third subcarrier 13 and the fourth subcarrier 14 are equal.

[0188] When the interface rate of the first interface is 800 Gb / s, the first interface transmits the second optical signal 2, the second optical carrier of the second optical signal 2 carries the second to-be-transmitted data, the encoding mode of the second to-be-transmitted data is OFEC, the modulation format is PCS-QAM, and the spectral power density of the second to-be-transmitted data is less than or equal to or greater than the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11. Here, although the modulation format of the second to-be-transmitted data and the modulation format of the first to-be-transmitted data carried by the second subcarrier 12 are both PCS-QAM, the upper limit of the spectral efficiency of the modulation format of the second to-be-transmitted data is higher than the upper limit of the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier 12. In this way, when the two modulation formats are configured at the same spectral efficiency, the transmission performance corresponding to the second subcarrier 12 is better (i.e., the error rate is lower). For example, the modulation format of the second to-be-transmitted data (i.e., the modulation format corresponding to PO) is PCS-16QAM, and the modulation format of the first to-be-transmitted data carried by the second subcarrier 12 (i.e., the modulation format corresponding to PO2) is PCS-64QAM.

[0189] When the interface rate of the first interface is 400 Gb / s, the first interface transmits the second optical signal 2', the second optical carrier of the second optical signal 2' carries the second to-be-transmitted data, the encoding mode of the second to-be-transmitted data is CFEC, the modulation format is DP-16QAM, and the spectral power density of the second to-be-transmitted data is equal to the spectral power density of the first to-be-transmitted data carried by the first subcarrier 11.

[0190] In this way, in addition to supporting an interface rate of 1.6 Tb / s, the embodiments of the present application can also be backward compatible with 400G-ZR+ and 800G-ZR+.

[0191] In some examples, the first interface rate is greater than the sum of the data transmission rates of the first to-be-transmitted data, and in this case, the method further includes the following three steps:

[0192] The first step is to generate a plurality of third to-be-transmitted data, the data transmission rates of the plurality of third to-be-transmitted data are the same, and there are at least two third to-be-transmitted data in the plurality of third to-be-transmitted data whose transmission configurations are different.

[0193] The second step is to carry the third to-be-transmitted data by using a third optical carrier to obtain a third optical signal, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier is greater than or equal to a spectrum width of the first optical carrier, and the third optical carrier includes a plurality of subcarriers, each of the subcarriers in the third optical carrier carries one of the third to-be-transmitted data.

[0194] The third step is to send the third optical signal through the first interface.

[0195] The first step is performed simultaneously with the aforementioned step 201, the second step is performed simultaneously with the aforementioned step 202, and the third step is performed simultaneously with the aforementioned step 203. In addition, the first step can be implemented by a processor in the aforementioned transmitter, and the second step and the third step can be implemented by an optical modulator in the aforementioned transmitter.

[0196] Optionally, the third optical carrier includes a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, and an eighth subcarrier. A carrier frequency of the seventh subcarrier and a carrier frequency of the fifth subcarrier are symmetric about a center frequency of the third optical carrier, a carrier frequency of the eighth subcarrier and a carrier frequency of the sixth subcarrier are symmetric about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are both located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier.

[0197] The transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier is the same as the transmission configuration of the third to-be-transmitted data carried by the seventh subcarrier, the transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier is different from the transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier, and the transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier is different from the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier.

[0198] The frequency range of the fourth subcarrier and the frequency range of the sixth subcarrier are both located between the center frequency of the first optical carrier and the center frequency of the third optical carrier.

[0199] In the case that the first optical signal and the third optical signal are transmitted simultaneously through the first interface, the receiving side has a larger receiving filter bandwidth, and the channel can be symmetrical about the center frequency of the combination of the first optical carrier and the third optical carrier. Therefore, the fourth subcarrier and the sixth subcarrier are not located in the edge region of the channel, and there is no signal-to-noise ratio loss caused by optical filtering. Therefore, the channel quality of the fourth subcarrier and the sixth subcarrier is better than that of the second subcarrier located in the edge region of the channel. In this case, the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier is lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier, and / or the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier is higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier.

[0200] When implemented, since the channel quality of the fourth subcarrier is the same as the channel quality of the sixth subcarrier, the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier can be the same as the transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier. In this way, it is beneficial to simplify the data processing algorithm.

[0201] The optical signal transmitted through the first interface when the first interface supports a first interface rate of 3.2Tb / s will be exemplarily described below with reference to FIG. 4.

[0202] As shown in FIG. 4, when the first interface rate of the first interface is 3.2Tb / s, the optical signal transmitted through the first interface includes the first optical signal 1 and the third optical signal 3. The data transmission rate of the first optical signal 1 and the third optical signal 3 is 1.6Tb / s. In FIG. 4, the direction indicated by the arrow is the direction in which the frequency gradually increases, and the direction perpendicular to the arrow represents the spectral power density.

[0203] The first optical carrier of the first optical signal 1 includes the first subcarrier 11, the second subcarrier 12, the third subcarrier 13, and the fourth subcarrier 14. The difference from the first optical signal shown in FIG. 3 is that the transmission configuration of the first to-be-transmitted data carried by the second subcarrier 12 is different from the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier 14.

[0204] The third optical carrier of the third optical signal 3 comprises a fifth subcarrier 31, a sixth subcarrier 32, a seventh subcarrier 33 and an eighth subcarrier 34. Each of the fifth subcarrier 31, the sixth subcarrier 32, the seventh subcarrier 33 and the eighth subcarrier 34 carries one of the third to-be-transmitted data. The transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier 31 is the same as that of the third to-be-transmitted data carried by the seventh subcarrier 33, and is different from that of the third to-be-transmitted data carried by the sixth subcarrier 32 and the eighth subcarrier 34. Moreover, the transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier 32 is different from that of the third to-be-transmitted data carried by the eighth subcarrier 34.

[0205] As shown in the (a) part of FIG. 4, the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier 14 is the same as that of the third to-be-transmitted data carried by the sixth subcarrier 32. The spectral power density of the first to-be-transmitted data carried by the fourth subcarrier 14 is less than that of the first to-be-transmitted data carried by the second subcarrier 12, and the spectral power density of the first to-be-transmitted data carried by the fourth subcarrier 14 is less than that of the third to-be-transmitted data carried by the eighth subcarrier 34. Similarly, the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier 32 is less than that of the first to-be-transmitted data carried by the second subcarrier 12, and the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier 32 is less than that of the third to-be-transmitted data carried by the eighth subcarrier 34.

[0206] As shown in the (b) part of FIG. 4, the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier 14 is the same as that of the third to-be-transmitted data carried by the sixth subcarrier 32. The spectral efficiency of the modulation format of the first to-be-transmitted data carried by the fourth subcarrier 14 is higher than that of the first to-be-transmitted data carried by the second subcarrier 12, and the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the fourth subcarrier 14 is higher than that of the third to-be-transmitted data carried by the eighth subcarrier 34. Similarly, the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier 32 is higher than that of the first to-be-transmitted data carried by the second subcarrier 12, and the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier 32 is higher than that of the third to-be-transmitted data carried by the eighth subcarrier 34.

[0207] Correspondingly, the spectral width of the fourth subcarrier 14 is less than that of the second subcarrier 12, and the spectral width of the sixth subcarrier 32 is less than that of the eighth subcarrier 34.

[0208] In FIG. 4, the first optical signal 1 and the third optical signal 3 correspond to one subchannel respectively, and the two subchannels are spliced together in the frequency domain to obtain a wider channel. In the subcarriers corresponding to each optical signal, only the two subcarriers located on both sides in the frequency domain are located in the edge region of the channel, and the other subcarriers are located in the middle region of the channel. That is, only the second subcarrier 12 and the eighth subcarrier 34 are located in the edge region of the channel. The subcarriers located in the edge region of the channel are limited by the optical filter. In each optical carrier, the subcarriers far away from the center frequency of the optical carrier are limited by the bandwidth of the devices in the optical module, and the channel quality corresponding to the subcarriers is lower than that of the subcarriers close to the center frequency of the optical carrier. Therefore, for the two adjacent subcarriers (i.e., the fourth subcarrier 14 and the sixth subcarrier 32) in the two adjacent subchannels (i.e., the fourth subcarrier 14 and the sixth subcarrier 32), the transmission configuration of the to-be-transmitted data carried by the two adjacent subcarriers needs to be adjusted to balance the transmission performance of each subcarrier.

[0209] If there is no bandwidth limitation in the devices in the optical module, the transmission configuration of the first to-be-transmitted data carried by the fourth subcarrier 14 can be the same as the transmission configuration of the first to-be-transmitted data carried by the first subcarrier 11; and the transmission configuration of the third to-be-transmitted data carried by the sixth subcarrier 32 can be the same as the transmission configuration of the third to-be-transmitted data carried by the fifth subcarrier 31.

[0210] In other embodiments, the first interface can also support a higher first interface rate. In this case, in addition to the first optical signal and the third optical signal, more optical signals can also be transmitted through the first interface. For example, the fifth optical signal, the sixth optical signal, the seventh optical signal, and the eighth optical signal can also be transmitted through the first interface.

[0211] The fifth optical carrier of the fifth optical signal and the seventh optical carrier of the seventh optical signal each include four subcarriers. The four subcarriers of the fifth optical carrier carry one of the fifth to-be-transmitted data, and the transmission configuration relationship between the four fifth to-be-transmitted data is the same as that between the four third to-be-transmitted data. The four subcarriers of the seventh optical carrier carry one of the seventh to-be-transmitted data, and the transmission configuration relationship between the four seventh to-be-transmitted data is similar to that between the four first to-be-transmitted data.

[0212] The sixth optical carrier of the sixth optical signal carries the sixth to-be-transmitted data, and the transmission configuration of the sixth to-be-transmitted data is the same as that of the second to-be-transmitted data described above. The eighth optical carrier of the eighth optical signal carries one of the eighth to-be-transmitted data, and the transmission configuration of the eighth to-be-transmitted data is the same as that of the second to-be-transmitted data described above.

[0213] The optical signals transmitted through the first interface when the first interface rate of the first interface is 6.4 Tb / s are exemplarily described below with reference to FIG. 5. In FIG. 5, the direction indicated by the arrow is the direction in which the frequency gradually increases, and the direction perpendicular to the arrow represents the spectral power density. As shown in FIG. 5, when the first interface rate of the first interface is 6.4 Tb / s, the optical signals transmitted through the first interface include the first optical signal 1, the third optical signal 3, the fifth optical signal 5, and the seventh optical signal 7. The data transmission rates of the first optical signal 1, the third optical signal 3, the fifth optical signal 5, and the seventh optical signal 7 are 1.6 Tb / s respectively.

[0214] As shown in the (a) part of FIG. 5, the center frequencies of the optical carriers of the first optical signal 1, the third optical signal 3, the fifth optical signal 5, and the seventh optical signal 7 gradually increase in turn. The spectral widths of the optical carriers of the first optical signal 1, the third optical signal 3, the fifth optical signal 5, and the seventh optical signal 7 are equal, and among the optical carriers of the first optical signal 1, the third optical signal 3, the fifth optical signal 5, and the seventh optical signal 7, the interval between the center frequencies of two adjacent optical carriers in the frequency domain is greater than or equal to the spectral width of the first optical carrier.

[0215] The relationship between each subcarrier of the first optical signal 1 and the transmission configuration of the first to-be-transmitted data carried by each subcarrier is the same as that of the first optical signal in the (a) part of FIG. 4. The relationship between each subcarrier of the third optical signal 3 and the transmission configuration of the third to-be-transmitted data carried by each subcarrier is basically the same as that of the third optical signal in the (a) part of FIG. 4, except that the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier 34 is different from that in the (a) part of FIG. 4. In the (a) part of FIG. 5, the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier 34 is the same as that of the third to-be-transmitted data carried by the sixth subcarrier 32, and the same as that of the first to-be-transmitted data carried by the fourth subcarrier 14.

[0216] The fifth optical carrier of the fifth optical signal 5 includes four subcarriers, and each subcarrier carries one of the fifth to-be-transmitted data. The spectral widths of the four subcarriers are the same as those of the four subcarriers of the third optical signal 3. The transmission configurations of the four fifth to-be-transmitted data are also the same as those of the four third to-be-transmitted data.

[0217] The seventh optical carrier of the seventh optical signal 7 includes four subcarriers, and each subcarrier carries one of the seventh to-be-transmitted data. The spectral widths of the four subcarriers are the same as those of the four subcarriers of the third optical signal 3. The transmission configurations of the four seventh to-be-transmitted data are the same as those of the four third to-be-transmitted data in the (a) part of FIG. 4.

[0218] As shown in part (b) of FIG. 5, the center frequencies of the optical carriers of the first optical signal 1, the third optical signal 3, the fifth optical signal 5 and the seventh optical signal 7 increase in turn. The spectral width of the optical carrier of the first optical signal 1 is equal to that of the seventh optical signal 7, the spectral width of the third optical signal 3 is equal to that of the fifth optical signal 5, and the spectral width of the first optical signal 1 and the seventh optical signal 7 is greater than that of the third optical signal 3. In addition, the interval between the center frequencies of two adjacent optical carriers in the frequency domain is greater than or equal to the spectral width of the third optical carrier.

[0219] The relationship between the transmission configurations of the first to-be-transmitted data carried by each subcarrier of the first optical signal 1 is the same as that of the first optical signal 1 in part (b) of FIG. 4. The relationship between the transmission configurations of the third to-be-transmitted data carried by each subcarrier of the third optical signal 3 and each subcarrier is basically the same as that of the third optical signal 3 in part (b) of FIG. 4, except that the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier 34 is different from that in part (b) of FIG. 4. In part (b) of FIG. 5, the transmission configuration of the third to-be-transmitted data carried by the eighth subcarrier 34 is the same as that of the third to-be-transmitted data carried by the sixth subcarrier 32, and the same as that of the first to-be-transmitted data carried by the fourth subcarrier 14.

[0220] The fifth optical carrier of the fifth optical signal 5 includes four subcarriers, each of which carries one of the fifth to-be-transmitted data. The spectral width of the four subcarriers is the same as that of the four subcarriers of the third optical signal 3. The transmission configuration of the four fifth to-be-transmitted data is also the same as that of the four third to-be-transmitted data.

[0221] The seventh optical carrier of the seventh optical signal 7 includes four subcarriers, each of which carries one of the seventh to-be-transmitted data. The spectral width of the four subcarriers is the same as that of the four subcarriers of the third optical signal 3. The transmission configuration of the four seventh to-be-transmitted data is the same as that of the four third to-be-transmitted data in part (b) of FIG. 4.

[0222] In FIG. 5, the first optical signal 1, the third optical signal 3, the fifth optical signal 5 and the seventh optical signal 7 correspond to one subchannel respectively, and the four subchannels are spliced together in the frequency domain to obtain a wider channel. In the subcarriers corresponding to each optical signal, only the two subcarriers located on both sides in the frequency domain are located in the edge region of the channel, and the other subcarriers are located in the middle region of the channel. Therefore, only the second subcarrier 12 and the subcarrier farthest from the second subcarrier 12 in the seventh optical carrier are located in the edge region of the channel.

[0223] In a possible implementation, when multiple optical signals are simultaneously transmitted through the first interface, the data transmission rate of each sub-channel can be switched individually. For example, in the case shown in FIG. 4, in the first time period, the first optical signal 1 and the third optical signal 3 are simultaneously transmitted through the first interface, and the rate of the sub-channel where the first optical signal 1 is located can be switched, so that in the second time period, the second optical signal 2 and the third optical signal 3 are simultaneously transmitted through the first interface.

[0224] In another possible implementation, when multiple optical signals are simultaneously transmitted through the first interface, the data transmission rate of all optical signals can be switched uniformly. For example, in the case shown in FIG. 4, in the first time period, the first optical signal 1 and the third optical signal 3 are simultaneously transmitted through the first interface, and the rates of the two sub-channels must be switched simultaneously, so that in the second time period, the second optical signal 2 and the fourth optical signal 4 are simultaneously transmitted through the first interface.

[0225] It should be noted that, in a possible implementation, the optical signal in each sub-channel, for example, the first optical signal, the third optical signal, the fifth optical signal and the seventh optical signal, can be implemented by using a combination of an optical modulator and a laser, that is, each combination of an optical modulator and a laser is used to generate an optical signal in a frequency range, and the optical signals generated by different combinations are in different frequency ranges. In another possible implementation, the optical signals in all sub-channels are implemented by using a combination of an optical modulator and a laser.

[0226] FIG. 6 is a flow diagram of a signal receiving method provided by an embodiment of the present application. The method can be performed by the receiving device described above, for example, by the coherent light module (receiver) of the receiving device. As shown in FIG. 6, the signal receiving method includes the following steps.

[0227] 601: receiving, through a second interface, a first optical signal, a first optical carrier of the first optical signal including a plurality of sub-carriers, each sub-carrier in the first optical carrier carrying a first received data.

[0228] The data transmission rate of the first received data carried by each sub-carrier in the first optical carrier is the same, the first received data carried by at least two sub-carriers of the first optical carrier is different in transmission configuration, the transmission configuration including at least one of a modulation format, a coding mode and a spectral power density, and the second interface has a first interface rate.

[0229] The second interface is an input port of the optical module.

[0230] 602: obtaining, based on the first optical signal, a plurality of first received data.

[0231] Optionally, the first optical carrier comprises a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, a carrier frequency of the first subcarrier and a carrier frequency of the third subcarrier are symmetrical about a center frequency of the first optical carrier, a carrier frequency of the second subcarrier and a carrier frequency of the fourth subcarrier are symmetrical about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both located between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier. The transmission configuration of the first received data carried by the first subcarrier is the same as the transmission configuration of the first received data carried by the third subcarrier, and the transmission configuration of the first received data carried by the first subcarrier is different from the transmission configuration of the first received data carried by the second subcarrier.

[0232] In the embodiments of the present application, the steps 601-602 can be implemented by the optical demodulator in the aforementioned receiver. After obtaining the multiple first received data, the processor in the receiver can process the multiple first received data, for example, demodulation and decoding, etc., and send the processed data to the customer side device through the SERDES.

[0233] Optionally, the transmission configuration of the first received data carried by the first subcarrier and the transmission configuration of the first received data carried by the second subcarrier satisfy at least one of the following relationships:

[0234] The transmission configuration comprises a spectral power density, and the spectral power density of the first received data carried by the first subcarrier is lower than the spectral power density of the first received data carried by the second subcarrier.

[0235] The transmission configuration comprises an encoding mode, and the error correction performance of the encoding mode of the first received data carried by the first subcarrier is lower than the error correction performance of the encoding mode of the first received data carried by the second subcarrier.

[0236] The transmission configuration comprises a modulation format, and the spectral efficiency corresponding to the modulation format of the first received data carried by the first subcarrier is higher than the spectral efficiency of the modulation format of the first received data carried by the second subcarrier.

[0237] Optionally, the transmission configuration comprises an encoding mode, and the encoding mode of the first received data carried by the first subcarrier and the third subcarrier is both code C FEC, and the encoding mode of the first received data carried by the second subcarrier and the fourth subcarrier is both OFEC.

[0238] The first optical signal is the second optical signal in the optical signal transmission method transmitted to the second interface through an optical transmission link. Each of the first received data corresponds to one of the first to-be-transmitted data and is substantially the same as the first to-be-transmitted data, and there is a small amount of difference, that is, a small amount of error code, due to the influence of noise and the like. For details of the first optical carrier and the first received data, refer to the related content of the first optical carrier and the first to-be-transmitted data in the optical signal transmission method, which will not be described in detail here.

[0239] Optionally, similar to the first interface, the second interface can also support switching between different interface rates. Therefore, the signal receiving method further includes steps 603-604:

[0240] 603: receiving a second optical signal through the second interface; the second optical carrier of the second optical signal carries second received data.

[0241] The center frequency of the second optical carrier is the same as the center frequency of the first optical carrier, the data transmission rate of the second received data is less than the sum of the data transmission rates of the plurality of first received data, the second interface has a second interface rate, and the second interface rate is less than the first interface rate.

[0242] The second optical signal is the second optical signal in the optical signal transmission method transmitted to the second interface through an optical transmission link. The second received data corresponds to the second to-be-transmitted data and is substantially the same as the second to-be-transmitted data, and there is a small amount of difference, that is, a small amount of error code, due to the influence of noise and the like. For details of the second optical carrier and the second received data, refer to the related content of the second optical carrier and the second to-be-transmitted data in the optical signal transmission method, which will not be described in detail here.

[0243] 604: obtaining the second received data based on the second optical signal.

[0244] In some examples, the sum of the data transmission rates of the plurality of first received data is twice the data transmission rate of the second received data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier.

[0245] In other examples, the sum of the data transmission rates of the plurality of first received data is four times the data transmission rate of the second received data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

[0246] In the embodiments of the present application, the steps 603-604 can be implemented by the optical demodulator in the aforementioned receiver. After obtaining the second received data, the processor in the receiver can process the second received data, and send the processed data to the customer-side device through the SERDES.

[0247] Optionally, when the first interface rate is greater than the sum of the data transmission rates of the first received data, the signal receiving method further comprises the following two steps:

[0248] The first step is to receive a third optical signal through the second interface, and a third optical carrier of the third optical signal carries a plurality of third received data.

[0249] The third optical carrier includes a plurality of subcarriers, each subcarrier of the third optical carrier carries one of the third received data, and different subcarriers of the third optical carrier carry different third received data. The data transmission rates of the third received data are the same, and the transmission configurations of at least two of the third received data are different.

[0250] The third optical signal is transmitted to the second interface through an optical transmission link in the aforementioned signal transmitting method. Each third received data corresponds to one of the aforementioned third to-be-transmitted data and is substantially the same as the corresponding third to-be-transmitted data, and there is a small amount of difference due to noise and the like, that is, there is a small amount of error code. For details of the third optical carrier and the third received data, please refer to the related content of the third optical carrier and the third to-be-transmitted data in the aforementioned signal transmitting method, which will not be described in detail here.

[0251] The second step is to obtain a plurality of third received data based on the third optical signal.

[0252] The first step is executed synchronously with step 601, and the second step is executed synchronously with step 602. In the embodiments of the present application, the first step and the second step can be implemented by the optical demodulator in the aforementioned receiver. After obtaining the plurality of third received data, the processor in the receiver can process the second received data, and send the processed data to the customer-side device through the SERDES.

[0253] Optionally, the third optical carrier includes a fifth subcarrier, a sixth subcarrier, a seventh subcarrier and an eighth subcarrier. The carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are symmetrical about the center frequency of the third optical carrier, the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier are symmetrical about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are both between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier. The frequency range of the fourth subcarrier and the frequency range of the sixth subcarrier are both between the center frequency of the first optical carrier and the center frequency of the third optical carrier, the spectral power density of the first received data carried by the fourth subcarrier and the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier are both lower than the spectral power density of the first received data carried by the second subcarrier, and / or the spectral efficiency of the modulation format of the first received data carried by the fourth subcarrier and the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier are both higher than the spectral efficiency of the modulation format of the first received data carried by the second subcarrier.

[0254] In addition, when the first interface rate is greater than the sum of the data transmission rates of the first received data and the data transmission rates of the third received data, the signal receiving method further includes: receiving other optical signals in addition to the first optical signal and the third optical signal, such as the fifth optical signal and the seventh optical signal.

[0255] The descriptions of the corresponding processes of the above respective figures each have a focus, and the parts not described in detail in a certain process can be referred to the related descriptions of other processes.

[0256] Embodiments of the present application also provide an optical signal sending device, and FIG. 7 is a structural schematic diagram of an optical signal sending device provided by an embodiment of the present application. As shown in FIG. 7, the optical signal sending device 700 includes a generating module 701, a modulating module 702 and a sending module 703.

[0257] The generating module 701 is configured to generate a plurality of first to-be-transmitted data, the data transmission rates of the plurality of first to-be-transmitted data are the same, and transmission configurations of at least two first to-be-transmitted data in the plurality of first to-be-transmitted data are different, the transmission configurations including at least one of a modulation format, a coding mode and a spectral power density. The modulating module 702 is configured to carry the plurality of first to-be-transmitted data by using a first optical carrier to obtain a first optical signal, each subcarrier in the first optical carrier carries one first to-be-transmitted data in the plurality of first to-be-transmitted data. The sending module 703 is configured to send the first optical signal through a first interface, the first interface has a first interface rate.

[0258] Optionally, the generating module 701 is further configured to generate a second to-be-transmitted data; the modulating module 702 is further configured to carry the second to-be-transmitted data on a second optical carrier to obtain a second optical signal, the center frequency of the second optical carrier being the same as that of the first optical carrier; and the sending module 703 is further configured to send the second optical signal through the first interface, the first interface having a second interface rate, the second interface rate being less than the first interface rate.

[0259] Optionally, the generating module 701 is further configured to generate a plurality of third to-be-transmitted data, the data transmission rates of the plurality of third to-be-transmitted data being the same, and transmission configurations of at least two of the plurality of third to-be-transmitted data being different; the modulating module 702 is further configured to carry the plurality of third to-be-transmitted data on a third optical carrier to obtain a third optical signal, the difference between the center frequency of the third optical carrier and that of the first optical carrier being greater than or equal to the spectral width of the first optical carrier, the third optical carrier comprising a plurality of subcarriers, each of the subcarriers of the third optical carrier carrying one of the plurality of third to-be-transmitted data; and the sending module 703 is further configured to send the third optical signal through the first interface.

[0260] It should be noted that, in other embodiments, the generating module can be configured to perform any step of the optical signal sending method, the modulating module can be configured to perform any step of the optical signal sending method, and the sending module can be configured to perform any step of the optical signal sending method. The steps responsible for implementation by the generating module, the modulating module, and the sending module can be specified as needed, and the overall function of the optical signal sending device can be achieved by implementing different steps of the optical signal sending method by the generating module, the modulating module, and the sending module respectively.

[0261] The embodiment of the present application further provides an optical signal receiving device, and FIG. 8 is a structural schematic diagram of an optical signal receiving device according to an embodiment of the present application. As shown in FIG. 8, the optical signal receiving device 800 comprises a receiving module 801 and an obtaining module 802.

[0262] The receiving module 801 is configured to receive a first optical signal through a second interface, the first optical carrier of the first optical signal comprising a plurality of subcarriers, each of the subcarriers of the first optical carrier carrying a first received data, the data transmission rates of the first received data carried by each of the subcarriers of the first optical carrier being the same, the transmission configurations of the first received data carried by at least two of the subcarriers of the first optical carrier being different, the transmission configuration comprising at least one of a modulation format, a coding mode, and a spectral power density, and the first interface having a first interface rate; and the obtaining module 802 is configured to obtain a plurality of the first received data based on the first optical signal.

[0263] Optionally, the receiving module 801 is further configured to receive a second optical signal through the second interface, a second optical carrier of the second optical signal carrying second received data, a center frequency of the second optical carrier being the same as a center frequency of the first optical carrier, a data transmission rate of the second received data being less than a sum of data transmission rates of the multipath first received data, the first interface having a second interface rate, the second interface rate being less than the first interface rate; and the obtaining module 802 is further configured to obtain the second received data based on the second optical signal.

[0264] Optionally, the receiving module 801 is further configured to receive a third optical signal through the second interface, a third optical carrier of the third optical signal carrying multipath third received data, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier being greater than or equal to a spectral width of the first optical carrier, the third optical carrier including a plurality of subcarriers, each of the subcarriers in the third optical carrier carrying one of the multipath third received data, data transmission rates of the multipath third received data being the same, and transmission configurations of at least two of the multipath third received data being different; and the obtaining module 802 is further configured to obtain the multipath third received data based on the third optical signal.

[0265] It should be noted that in other embodiments, the receiving module can be configured to perform any step of the optical signal receiving method, the obtaining module can be configured to perform any step of the optical signal receiving method, and the steps implemented by the receiving module and the obtaining module can be specified as needed to achieve the overall function of the optical signal receiving apparatus by obtaining different steps of the optical signal receiving method.

[0266] The present application also provides a computer device 100. As shown in FIG. 9, the computer device 100 includes a bus 102, a processor 104, a memory 106, and a communication interface 108. The processor 104, the memory 106, and the communication interface 108 communicate through the bus 102. The computer device 100 can be a server or a terminal device. It should be understood that the present application does not limit the number of processors and memories in the computer device 100.

[0267] The bus 102 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one line is shown in FIG. 9, but it does not mean that there is only one bus or only one type of bus. The bus 104 can include a path for transmitting information between various components (e.g., the memory 106, the processor 104, the communication interface 108) of the computer device 100.

[0268] The processor 104 can include any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP), etc.

[0269] The memory 106 can include a volatile memory, such as a random access memory (RAM). The processor 104 can also include a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid state drive (SSD).

[0270] The memory 106 stores executable program code, and the processor 104 executes the executable program code to respectively implement the functions of the aforementioned generation module, modulation module, and transmission module, thereby implementing the optical signal transmission method. That is, the memory 106 stores instructions for executing the optical signal transmission method. Alternatively, the memory 106 stores executable program code, and the processor 104 executes the executable program code to respectively implement the functions of the aforementioned receiving module and obtaining module, thereby implementing the optical signal reception method. That is, the memory 106 stores instructions for executing the optical signal reception method.

[0271] The communication interface 103 uses a transceiving module such as, but not limited to, a network interface card, a transceiver, etc., to implement communication between the computer device 100 and other devices or communication networks.

[0272] The embodiment of the present application further provides a computer program product containing instructions. The computer program product can be software or a program product containing instructions, which can run on a computer device or be stored in any available medium. When the computer program product runs on at least one computer device, the at least one computer device is caused to execute the foregoing optical signal sending method or optical signal receiving method.

[0273] The embodiment of the present application further provides a computer readable storage medium. The computer readable storage medium can be any available medium that the computer device can store or a data storage device such as a data center containing one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk) and the like. The computer readable storage medium contains instructions, which instruct the computer device to execute the foregoing optical signal sending method or optical signal receiving method.

[0274] The embodiment of the present application further provides a chip. The chip includes a processor and a communication interface, the communication interface being connected with the processor; the processor is used for executing instructions, so that the chip executes the foregoing optical signal sending method or optical signal receiving method.

[0275] The above description is merely specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application.

Claims

1. A method of transmitting an optical signal, characterized by, The method comprises: generating multiple first to-be-transmitted data, the data transmission rates of the multiple first to-be-transmitted data being the same, and transmission configurations of at least two of the multiple first to-be-transmitted data being different, the transmission configuration comprising at least one of modulation format, coding mode and spectral power density; carrying the multiple first to-be-transmitted data by using a first optical carrier to obtain a first optical signal, the first optical carrier comprising multiple subcarriers, each subcarrier in the first optical carrier carrying one of the multiple first to-be-transmitted data; sending the first optical signal through a first interface, the first interface having a first interface rate.

2. The method of claim 1, wherein, The first optical carrier comprises a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier being symmetrical about the center frequency of the first optical carrier, the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier being symmetrical about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier both being located between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier; the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is the same as the transmission configuration of the first to-be-transmitted data carried by the third subcarrier, and the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier.

3. The method of claim 2, wherein, The transmission configuration comprises spectral power density, the spectral power density of the first to-be-transmitted data carried by the first subcarrier being lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier; The transmission configuration comprises coding mode, the error correction performance of the coding mode of the first to-be-transmitted data carried by the first subcarrier being lower than the error correction performance of the coding mode of the first to-be-transmitted data carried by the second subcarrier; The transmission configuration comprises modulation format, the spectral efficiency corresponding to the modulation format of the first to-be-transmitted data carried by the first subcarrier being higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier. The transmission configuration comprises coding mode, the coding mode of the first to-be-transmitted data carried by the first subcarrier and the third subcarrier both being cascaded forward error correction coding CFEC, and the coding mode of the first to-be-transmitted data carried by the second subcarrier and the fourth subcarrier both being open forward error correction coding OFEC.

4. The method of claim 2, wherein, The method further comprises:

5. The method according to any one of claims 2 to 4, characterized in that, generating one second to-be-transmitted data; carrying the second to-be-transmitted data by using a second optical carrier to obtain a second optical signal, the center frequency of the second optical carrier being the same as the center frequency of the first optical carrier; sending the second optical signal through the first interface, the first interface having a second interface rate, the second interface rate being less than the first interface rate. ​ 6. The method of claim 5, wherein, The sum of the data transmission rates of the multiple first to-be-transmitted data is twice the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier; or The sum of the data transmission rates of the multiple first to-be-transmitted data is four times the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

7. The method according to any one of claims 2 to 6, characterized in that, The method further comprises: generating multiple third to-be-transmitted data, the data transmission rates of the multiple third to-be-transmitted data being the same, and the transmission configurations of at least two of the multiple third to-be-transmitted data being different; carrying the multiple third to-be-transmitted data by using a third optical carrier to obtain a third optical signal, the difference between the center frequency of the third optical carrier and the center frequency of the first optical carrier being greater than or equal to the spectral width of the first optical carrier, the third optical carrier comprising multiple subcarriers, each subcarrier in the third optical carrier carrying one of the multiple third to-be-transmitted data; sending the third optical signal through the first interface.

8. The method of claim 7, wherein, The third optical carrier comprises a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, and an eighth subcarrier, the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier being symmetrical about the center frequency of the third optical carrier, the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier being symmetrical about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier both being located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier; The frequency ranges of the fourth subcarrier and the sixth subcarrier are both located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, the spectral power density of the first to-be-transmitted data carried by the fourth subcarrier and the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier are both lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier, and / or the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the fourth subcarrier and the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier are both higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier.

9. The method according to any one of claims 1 to 6, characterized in that, The first interface rate is 1.6 Tb / s, and the data transmission rate of each of the multiple first to-be-transmitted data is 400 Gb / s.

10. A method of receiving an optical signal, characterized by, comprises: receiving a first optical signal through a second interface, the first optical carrier of the first optical signal comprising multiple subcarriers, each subcarrier in the first optical carrier carrying one of the first received data, and the data transmission rate of each subcarrier in the first optical carrier carrying one of the first received data being the same, the transmission configurations of the first received data carried by at least two subcarriers of the first optical carrier being different, the transmission configurations comprising at least one of a modulation format, a coding mode, and a spectral power density, the second interface having a first interface rate; The sum of the data transmission rates of the multiple first to-be-transmitted data is twice the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier; or The sum of the data transmission rates of the multiple first to-be-transmitted data is four times the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier. The method further comprises: generating multiple third to-be-transmitted data, the data transmission rates of the multiple third to-be-transmitted data being the same, and the transmission configurations of at least two of the multiple third to-be-transmitted data being different; carrying the multiple third to-be-transmitted data by using a third optical carrier to obtain a third optical signal, the difference between the center frequency of the third optical carrier and the center frequency of the first optical carrier being greater than or equal to the spectral width of the first optical carrier, the third optical carrier comprising multiple subcarriers, each subcarrier in the third optical carrier carrying one of the multiple third to-be-transmitted data; sending the third optical signal through the first interface. The third optical carrier comprises a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, and an eighth subcarrier, the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier being symmetrical about the center frequency of the third optical carrier, the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier being symmetrical about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier both being located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier; The frequency ranges of the fourth subcarrier and the sixth subcarrier are both located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, the spectral power density of the first to-be-transmitted data carried by the fourth subcarrier and the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier are both lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier, and / or the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the fourth subcarrier and the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier are both higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier. The first interface rate is 1.6 Tb / s, and the data transmission rate of each of the multiple first to-be-transmitted data is 400 Gb / s. Based on the first optical signal, a plurality of the first received data is obtained.

11. The method of claim 10, wherein, The first optical carrier includes a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetrical about the center frequency of the first optical carrier, the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier are symmetrical about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both located between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier. The transmission configuration of the first received data carried by the first subcarrier is the same as the transmission configuration of the first received data carried by the third subcarrier, and the transmission configuration of the first received data carried by the first subcarrier is different from the transmission configuration of the first received data carried by the second subcarrier.

12. The method of claim 11, wherein, The transmission configuration of the first received data carried by the first subcarrier and the transmission configuration of the first received data carried by the second subcarrier satisfy at least one of the following relationships: The transmission configuration includes spectral power density, and the spectral power density of the first received data carried by the first subcarrier is lower than the spectral power density of the first received data carried by the second subcarrier; The transmission configuration includes an encoding mode, and the error correction performance of the encoding mode of the first received data carried by the first subcarrier is lower than the error correction performance of the encoding mode of the first received data carried by the second subcarrier; The transmission configuration includes a modulation format, and the spectral efficiency corresponding to the modulation format of the first received data carried by the first subcarrier is higher than the spectral efficiency of the modulation format of the first received data carried by the second subcarrier.

13. The method of claim 11, wherein, The transmission configuration includes an encoding mode, and the encoding mode of the first received data carried by the first subcarrier and the third subcarrier is all concatenated forward error correction coding CFEC, and the encoding mode of the first received data carried by the second subcarrier and the fourth subcarrier is all open forward error correction coding OFEC.

14. The method according to any one of claims 11 to 13, characterized in that, The method further comprises: Receiving a second optical signal through the second interface, the second optical carrier of the second optical signal carrying second received data, the center frequency of the second optical carrier being the same as the center frequency of the first optical carrier, the data transmission rate of the second received data being less than the sum of the data transmission rates of the plurality of first received data, the second interface having a second interface rate, the second interface rate being less than the first interface rate; Based on the second optical signal, the second received data is obtained.

15. The method of claim 14, wherein, The sum of the data transmission rates of the plurality of first received data is twice the data transmission rate of the second received data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier; or, The sum of the data transmission rates of the plurality of first received data is four times the data transmission rate of the second received data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

16. The method according to any one of claims 11 to 15, characterized in that, The method further comprises: The third optical signal is received through the second interface, a third optical carrier of the third optical signal carries a plurality of third received data, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier is greater than or equal to a spectral width of the first optical carrier, the third optical carrier includes a plurality of subcarriers, each of the subcarriers in the third optical carrier carries one of the plurality of third received data, data transmission rates of the plurality of third received data are the same, and transmission configurations of at least two of the plurality of third received data are different; The plurality of third received data is obtained based on the third optical signal.

17. The method of claim 16, wherein, The third optical carrier includes a fifth subcarrier, a sixth subcarrier, a seventh subcarrier and an eighth subcarrier, a carrier frequency of the fifth subcarrier and a carrier frequency of the seventh subcarrier are symmetrical about a center frequency of the third optical carrier, a carrier frequency of the sixth subcarrier and a carrier frequency of the eighth subcarrier are symmetrical about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are both located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier. The frequency ranges of the fourth subcarrier and the sixth subcarrier are both located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, the spectral power density of the first received data carried by the fourth subcarrier and the spectral power density of the third to-be-transmitted data carried by the sixth subcarrier are both lower than the spectral power density of the first received data carried by the second subcarrier, and / or the spectral efficiency of the modulation format of the first received data carried by the fourth subcarrier and the spectral efficiency of the modulation format of the third to-be-transmitted data carried by the sixth subcarrier are both higher than the spectral efficiency of the modulation format of the first received data carried by the second subcarrier.

18. The method according to any one of claims 10 to 15, characterized in that, The first interface rate is 1.6 Tb / s, and the data transmission rate of each of the first received data is 400 Gb / s.

19. An optical communication device, comprising: The device includes a processor, a light source and an optical modulator. The processor is configured to generate a plurality of first to-be-transmitted data, the plurality of first to-be-transmitted data have the same data transmission rate, and transmission configurations of at least two of the plurality of first to-be-transmitted data are different, the transmission configurations including at least one of a modulation format, a coding mode and a spectral power density; The light source is configured to provide a first optical carrier; The optical modulator is configured to carry the plurality of first to-be-transmitted data by using the first optical carrier to obtain a first optical signal, the first optical carrier includes a plurality of subcarriers, each of the subcarriers in the first optical carrier carries one of the plurality of first to-be-transmitted data, and the first optical signal is transmitted through a first interface, the first interface has a first interface rate.

20. The apparatus of claim 19, wherein, The first optical carrier includes a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetrical about the center frequency of the first optical carrier, the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier are symmetrical about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier; The transmission configuration of the first to-be-transmitted data carried by the first subcarrier is the same as the transmission configuration of the first to-be-transmitted data carried by the third subcarrier, and the transmission configuration of the first to-be-transmitted data carried by the first subcarrier is different from the transmission configuration of the first to-be-transmitted data carried by the second subcarrier.

21. The apparatus of claim 20, wherein, The transmission configuration of the first to-be-transmitted data carried by the first subcarrier and the transmission configuration of the first to-be-transmitted data carried by the second subcarrier satisfy at least one of the following relationships: The transmission configuration includes spectral power density, and the spectral power density of the first to-be-transmitted data carried by the first subcarrier is lower than the spectral power density of the first to-be-transmitted data carried by the second subcarrier; The transmission configuration includes an encoding mode, and the error correction performance of the encoding mode of the first to-be-transmitted data carried by the first subcarrier is lower than the error correction performance of the encoding mode of the first to-be-transmitted data carried by the second subcarrier; The transmission configuration includes a modulation format, and the modulation format of the first to-be-transmitted data carried by the first subcarrier corresponds to a spectral efficiency higher than the spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier.

22. The apparatus of claim 20, wherein, The transmission configuration includes an encoding mode, and the encoding mode of the first to-be-transmitted data carried by the first subcarrier and the third subcarrier is all concatenated forward error correction coding CFEC, and the encoding mode of the first to-be-transmitted data carried by the second subcarrier and the fourth subcarrier is all open forward error correction coding OFEC.

23. The apparatus of any one of claims 20-22, wherein, The processor is further configured to generate a second to-be-transmitted data; The light source is further configured to provide a second optical carrier, and the center frequency of the second optical carrier is the same as the center frequency of the first optical carrier; The optical modulator is further configured to carry the second to-be-transmitted data by using the second optical carrier to obtain a second optical signal, and transmit the second optical signal through the first interface, wherein the first interface has a second interface rate, and the second interface rate is less than the first interface rate.

24. The apparatus of claim 23, wherein, The sum of the data transmission rates of the multiple first to-be-transmitted data is twice the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier; or The sum of the data transmission rates of the multiple first to-be-transmitted data is four times the data transmission rate of the second to-be-transmitted data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

25. The apparatus of any one of claims 20 to 24, wherein, The processor is further configured to generate a plurality of third to-be-transmitted data, the plurality of third to-be-transmitted data have a same data transmission rate, and transmission configurations of at least two of the plurality of third to-be-transmitted data are different. The light source is further configured to provide a third optical carrier, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier is greater than or equal to a spectral width of the first optical carrier, and the third optical carrier includes a plurality of subcarriers. The optical modulator is further configured to carry the plurality of third to-be-transmitted data on the third optical carrier to obtain a third optical signal, and transmit the third optical signal through the first interface, and each of the subcarriers in the third optical carrier carries one of the plurality of third to-be-transmitted data.

26. The apparatus of claim 25, wherein, The third optical carrier includes a fifth subcarrier, a sixth subcarrier, a seventh subcarrier and an eighth subcarrier, a carrier frequency of the fifth subcarrier and a carrier frequency of the seventh subcarrier are symmetric about a center frequency of the third optical carrier, a carrier frequency of the sixth subcarrier and a carrier frequency of the eighth subcarrier are symmetric about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier are both located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier. The fourth subcarrier and the sixth subcarrier are both located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, a spectral power density of the first to-be-transmitted data carried by the fourth subcarrier and a spectral power density of the third to-be-transmitted data carried by the sixth subcarrier are both lower than a spectral power density of the first to-be-transmitted data carried by the second subcarrier, and / or a spectral efficiency of a modulation format of the first to-be-transmitted data carried by the fourth subcarrier and a spectral efficiency of a modulation format of the third to-be-transmitted data carried by the sixth subcarrier are both higher than a spectral efficiency of a modulation format of the first to-be-transmitted data carried by the second subcarrier.

27. The apparatus of any one of claims 19 to 24, wherein, The first interface rate is 1.6 Tb / s, and a data transmission rate of each of the plurality of first to-be-transmitted data is 400 Gb / s.

28. An optical communication device, comprising: The device includes a processor and an optical demodulator. The optical demodulator is configured to receive a first optical signal through a second interface, a first optical carrier of the first optical signal includes a plurality of subcarriers, each of the subcarriers in the first optical carrier carries one of first received data, a data transmission rate of each of the first received data carried by each of the subcarriers in the first optical carrier is the same, transmission configurations of the first received data carried by at least two of the subcarriers in the first optical carrier are different, the transmission configurations include at least one of a modulation format, a coding mode and a spectral power density, the second interface has a first interface rate, and a plurality of the first received data is obtained based on the first optical signal. The processor is configured to process the plurality of the first received data.

29. The apparatus of claim 28, wherein, The first optical carrier includes a first subcarrier, a second subcarrier, a third subcarrier and a fourth subcarrier, the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are symmetrical about the center frequency of the first optical carrier, the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier are symmetrical about the center frequency of the first optical carrier, and the carrier frequency of the first subcarrier and the carrier frequency of the third subcarrier are both between the carrier frequency of the second subcarrier and the carrier frequency of the fourth subcarrier; The transmission configuration of the first received data carried by the first subcarrier is the same as the transmission configuration of the first received data carried by the third subcarrier, and the transmission configuration of the first received data carried by the first subcarrier is different from the transmission configuration of the first received data carried by the second subcarrier.

30. The apparatus of claim 29, wherein, The transmission configuration of the first received data carried by the first subcarrier and the transmission configuration of the first received data carried by the second subcarrier satisfy at least one of the following relationships: The transmission configuration includes spectral power density, and the spectral power density of the first received data carried by the first subcarrier is lower than the spectral power density of the first received data carried by the second subcarrier; The transmission configuration includes an encoding mode, and the error correction performance of the encoding mode of the first received data carried by the first subcarrier is lower than the error correction performance of the encoding mode of the first received data carried by the second subcarrier; The transmission configuration includes a modulation format, and the modulation format of the first received data carried by the first subcarrier corresponds to a spectral efficiency higher than the spectral efficiency of the modulation format of the first received data carried by the second subcarrier.

31. The apparatus of claim 29, wherein, The transmission configuration includes an encoding mode, and the encoding mode of the first received data carried by the first subcarrier and the third subcarrier is all concatenated forward error correction coding CFEC, and the encoding mode of the first received data carried by the second subcarrier and the fourth subcarrier is all open forward error correction coding OFEC.

32. The apparatus of any one of claims 29-31, wherein, The optical demodulator is also used to receive a second optical signal through the second interface, the second optical carrier of the second optical signal carries second received data, the center frequency of the second optical carrier is the same as the center frequency of the first optical carrier, the data transmission rate of the second received data is less than the sum of the data transmission rates of the plurality of first received data, the second interface has a second interface rate, and the second interface rate is less than the first interface rate; and based on the second optical signal, the second received data is obtained.

33. The apparatus of claim 32, wherein, The sum of the data transmission rates of the plurality of first received data is twice the data transmission rate of the second received data, and the spectral width of the second optical carrier is twice the spectral width of the first subcarrier; or, The sum of the data transmission rates of the plurality of first received data is four times the data transmission rate of the second received data, and the spectral width of the second optical carrier is equal to the spectral width of the first subcarrier.

34. The apparatus of any one of claims 29 to 33, wherein, The optical demodulator is also configured to receive a third optical signal through the second interface, a third optical carrier of the third optical signal carrying a plurality of third received data, a difference between a center frequency of the third optical carrier and a center frequency of the first optical carrier being greater than or equal to a spectral width of the first optical carrier, the third optical carrier including a plurality of subcarriers, each of the subcarriers in the third optical carrier carrying one of the plurality of third received data, the plurality of third received data having a same data transmission rate, and transmission configurations of at least two of the plurality of third received data being different. The third optical carrier includes a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, and an eighth subcarrier, a carrier frequency of the fifth subcarrier and a carrier frequency of the seventh subcarrier being symmetric about a center frequency of the third optical carrier, a carrier frequency of the sixth subcarrier and a carrier frequency of the eighth subcarrier being symmetric about the center frequency of the third optical carrier, and the carrier frequency of the fifth subcarrier and the carrier frequency of the seventh subcarrier both being located between the carrier frequency of the sixth subcarrier and the carrier frequency of the eighth subcarrier.

35. The apparatus of claim 34, wherein, The fourth subcarrier and the sixth subcarrier both have a frequency range located between the center frequency of the first optical carrier and the center frequency of the third optical carrier, a spectral power density of the first to-be-transmitted data carried by the fourth subcarrier and a spectral power density of the third to-be-transmitted data carried by the sixth subcarrier both being lower than a spectral power density of the first to-be-transmitted data carried by the second subcarrier, and / or a spectral efficiency of a modulation format of the first to-be-transmitted data carried by the fourth subcarrier and a spectral efficiency of a modulation format of the third to-be-transmitted data carried by the sixth subcarrier both being higher than a spectral efficiency of the modulation format of the first to-be-transmitted data carried by the second subcarrier. The first interface rate is 1.6 Tb / s, and a data transmission rate of each of the first received data is 400 Gb / s.

36. The apparatus of any one of claims 28-33, wherein, The optical communication system includes a sending device configured to perform the optical signal sending method in any one of claims 1 to 9, and a receiving device configured to perform the optical signal receiving method in any one of claims 10 to 18.

37. An optical communication system, comprising: The chip includes a processor and a communication interface, the processor being configured to execute instructions to cause the chip to perform the optical signal sending method in any one of claims 1 to 9 or the optical signal receiving method in any one of claims 10 to 18.

38. A chip, characterized by The computer readable storage medium stores at least one instruction, the at least one instruction being loaded and executed by a computer device to cause the computer device to implement the optical signal sending method in any one of claims 1 to 9 or the optical signal receiving method in any one of claims 10 to 18.

39. A computer-readable storage medium, characterized in that, ​ 40. A computer program product, characterised in that, The computer program product comprises computer program code loaded and executed by the computer device to enable the computer device to implement the optical signal sending method according to any one of claims 1 to 9, or to implement the optical signal receiving method according to any one of claims 10 to 18.

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