Signal transmission method, communication system and related device

Abstract

Embodiments of the present application disclose a signal transmission method, a communication system and a photoelectric conversion module, wherein the photoelectric conversion module and a device jointly compensate an electric signal transmitted by a transmitting link, effectively suppressing inter-symbol interference, improving the signal quality of an optical signal, and reducing the bit error rate of the optical signal. The method comprises: a device or a photoelectric conversion module first allocates a first compensation parameter to the photoelectric conversion module, wherein the first compensation parameter is less than a link parameter of a transmission link; the device then compensates a first electric signal on the basis of a second compensation parameter to obtain a compensated second electric signal; the device transmits the second electric signal to the photoelectric conversion module; the photoelectric conversion module compensates the second electric signal on the basis of the first compensation parameter to obtain a compensated third electric signal; and the photoelectric conversion module finally performs electro-optical conversion on the third electric signal to obtain an optical signal, and the photoelectric conversion module emits the optical signal.

Description

Signal transmission method, communication system and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on July 31, 2023, with application number CN202310956699.8 and invention name “A signal transmission method, communication system and related equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of optical communications, and in particular to a signal transmission method, a communication system, and related equipment. Background Art

[0003] Optical networks are widely used in fields such as the fifth generation mobile communication technology (5G) and artificial intelligence. Optical networks include multiple optical communication devices. Existing optical communication equipment includes a device board on which a processing chip is packaged. The optical communication equipment also includes an optical module connected to the device board. In order to reduce the power consumption of the optical module, the processing chip compensates the electrical signal to suppress inter-symbol interference (ISI). The processing chip sends the compensated electrical signal to the optical module, which performs electrical-to-optical conversion on the electrical signal to output an optical signal.

[0004] However, the degree to which the processing chip compensates for the electrical signal and suppresses the ISI of the electrical signal is limited, which reduces the signal quality of the optical signal output by the optical module, causing the optical signal output by the optical module to be significantly degraded and increasing the bit error rate.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a signal transmission method, a communication system, and related equipment. The optoelectronic conversion module and the equipment jointly compensate for the electrical signal transmitted by the transmission link, effectively suppressing ISI, improving the signal quality of the optical signal, and reducing the bit error rate of the optical signal.

[0007] In a first aspect, an embodiment of the present application provides a signal transmission method, which is applied to a communication system including a device and a photoelectric conversion module. The method includes:

[0008] The device or the optoelectronic conversion module assigns a first compensation parameter to the optoelectronic conversion module. The first compensation parameter is less than a link parameter of a transmission link. The link parameter is used to compensate for an electrical signal transmitted by the transmission link. The transmission link includes a first transmission link and a second transmission link. The device includes a processing chip and a connector. The optoelectronic conversion module includes an electro-optical conversion chip. The first transmission link extends from the connector to the electro-optical conversion chip, and the second transmission link extends from the processing chip to the connector. The device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal. The second compensation parameter is less than the link parameter of the transmission link. The device obtains P tap coefficients. The device compensates the first electrical signal according to the P tap coefficients to obtain a second electrical signal. The P tap coefficients correspond to the second compensation parameter, or the device obtains P pre-stored tap coefficients according to the second compensation parameter. The device transmits the second electrical signal to the optoelectronic conversion module. The optoelectronic conversion module compensates the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal. The optoelectronic conversion module performs electro-optical conversion on the third electrical signal to obtain an optical signal, and the optoelectronic conversion module emits the optical signal. The photoelectric conversion module amplifies the high-frequency signal in the second electrical signal and attenuates the low-frequency signal according to the first compensation parameter to obtain a third electrical signal.

[0009] Using the method described in this aspect, the device and the optoelectronic conversion module compensate for the electrical signal transmitted by the transmission link in a distributed manner. Specifically, the device compensates for a portion of the link parameters (i.e., the second compensation parameter), while the optoelectronic conversion module compensates for another portion of the link parameters (i.e., the first compensation parameter). Because the device and the optoelectronic conversion module jointly compensate for the electrical signal transmitted by the transmission link, the burden on the device to compensate for the electrical signal transmitted by the transmission link is reduced, ISI is suppressed, and the signal quality of the optical signal output by the optoelectronic conversion module is improved.

[0010] Based on the first aspect, in an optional implementation manner, the device allocates the first compensation parameter to the photoelectric conversion module.

[0011] Using this implementation method, the device allocates a first compensation parameter based on the obtained link parameters, and the optoelectronic conversion module compensates the second electrical signal based on the first compensation parameter from the device, so as to achieve distributed compensation of the electrical signal transmitted by the transmission link by the device and the optoelectronic conversion module.

[0012] Based on the first aspect, in an optional implementation, after the device assigns the first compensation parameter to the optoelectronic conversion module, the method further includes: the device obtaining a first coefficient set from the optoelectronic conversion module, the first coefficient set corresponding to the first compensation parameter in a pre-stored list of the optoelectronic conversion module, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, the first coefficient set is used to obtain P tap coefficients, M and P are each any integer greater than 1, and the first coefficient set is used to compensate the first electrical signal. For example, the first coefficient set includes N tap coefficients, where N is any integer greater than 1. For another example, the first coefficient set includes first time-domain impulse response coefficients. The first time-domain impulse response coefficients refer to time-domain response coefficients obtained during the transmission of the electrical signal via the first transmission link. It can be understood that the first time-domain impulse response coefficients are related to the hardware of the first transmission link.

[0013] In this implementation, the optoelectronic conversion module pre-stores a pre-stored list containing M coefficient sets. Based on the pre-stored list, the optoelectronic conversion module obtains different first coefficient sets for different first compensation parameters. This allows the device to perform different compensations on the first electrical signal based on the different first coefficient sets, thereby maximally suppressing ISI and improving the quality of the optical signal.

[0014] Based on the first aspect, in an optional implementation, before the device compensates the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, the method includes: the device convolving the first coefficient set with the second coefficient set to obtain a third coefficient set, where the second coefficient set corresponds to the second compensation parameter, the second coefficient set is used to obtain P tap coefficients, and the third coefficient set is used to compensate the first electrical signal. For example, the second coefficient set includes P tap coefficients. In another example, the second coefficient set includes second time-domain impulse response coefficients. The second time-domain impulse response coefficients refer to time-domain response coefficients obtained during transmission of the electrical signal via the second transmission link. It is understood that the second time-domain impulse response coefficients are related to the hardware of the second transmission link. If the first coefficient set includes the first time-domain impulse response coefficients and the second coefficient set includes the second time-domain impulse response coefficients, then the convolved third coefficient set includes multiple tap coefficients. The device performs an inverse operation on the third coefficient set to obtain the P tap coefficients.

[0015] With this implementation, the third coefficient set is formed by convolving the first coefficient set and the second coefficient set, thereby improving the signal quality of the second signal obtained by the device compensating the first electrical signal according to the third coefficient set and suppressing ISI.

[0016] Based on the first aspect, in an optional implementation manner, the photoelectric conversion module distributes the first compensation parameter to the photoelectric conversion module.

[0017] With this implementation, if the device includes multiple photoelectric conversion modules, the multiple photoelectric conversion modules allocate the first compensation parameter based on parallel calculation, which effectively improves the calculation efficiency of allocating the first compensation parameter and reduces the time required for the device to emit the optical signal.

[0018] Based on the first aspect, in an optional implementation, after the photoelectric conversion module assigns the first compensation parameter to the photoelectric conversion module, the method also includes: the photoelectric conversion module obtains a second coefficient set from the device, the second coefficient set corresponds to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is an arbitrary integer greater than 1; the photoelectric conversion module convolves the first coefficient set and the second coefficient set to obtain a third coefficient set, the first coefficient set is in a pre-stored list of the photoelectric conversion module, and corresponds to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, and the first coefficient set is used to obtain P tap coefficients, where M is an arbitrary integer greater than 1; the device obtains the third coefficient set from the photoelectric conversion module, and the third coefficient set is used to compensate for the first electrical signal.

[0019] With this implementation, the third coefficient set is formed by convolving the first coefficient set and the second coefficient set, thereby improving the signal quality of the second signal obtained by the device compensating the first electrical signal according to the third coefficient set and suppressing ISI.

[0020] Based on the first aspect, in an optional implementation, the device compensates the first electrical signal according to the second compensation parameter to obtain the compensated second electrical signal, including: the forward feedback equalizer FFE of the device compensates the first electrical signal according to the third coefficient set to obtain the second electrical signal, and the third coefficient set includes P tap coefficients.

[0021] With this implementation, the FFE of the device compensates the first electrical signal according to the third coefficient set to obtain the second electrical signal, which can effectively improve the signal quality of the optical signal output by the optoelectronic conversion module and effectively suppress ISI.

[0022] Based on the first aspect, in an optional implementation, the device compensates the first electrical signal according to the second compensation parameter to obtain the compensated second electrical signal, including: the device obtains a second coefficient set corresponding to the second compensation parameter, the second coefficient set is used to obtain P tap coefficients, and P is an arbitrary integer greater than 1; the FFE of the device compensates the first electrical signal according to the second coefficient set to obtain the second electrical signal.

[0023] This implementation enables distributed compensation of the transmission link by the device and the optoelectronic conversion module, effectively improving the signal quality of the optical signal output by the optoelectronic conversion module and suppressing ISI. Furthermore, during the compensation process, the optoelectronic conversion module does not need to store excessive data, reducing the space resources occupied by the optoelectronic conversion module's registers. The optoelectronic conversion module directly compensates the second electrical signal based on the first compensation parameter received from the device, and the device directly compensates the first electrical signal based on the second compensation parameter, reducing the time consumed by the device and the optoelectronic conversion module to execute the signal transmission method.

[0024] Based on the first aspect, in an optional implementation, before the device or the optoelectronic conversion module assigns the first compensation parameter to the optoelectronic conversion module, the method further includes: the device or the optoelectronic conversion module obtains the pre-stored link parameter; or, the device or the optoelectronic conversion module obtains a first link parameter of the first transmission link, where the first link parameter is used to compensate for the electrical signal transmitted by the first transmission link; the device obtains a second link parameter of the second transmission link, where the second link parameter is used to compensate for the electrical signal transmitted by the second transmission link, and the link parameter is greater than or equal to the sum of the first link parameter and the second link parameter.

[0025] This implementation method enables distributed compensation of the transmission link by the device and the optoelectronic conversion module based on the link parameters, reducing the burden on the device to compensate for the second transmission link, effectively improving the signal quality of the optical signal output by the optoelectronic conversion module, suppressing ISI, reducing the bit error rate, and ensuring the successful transmission of the service.

[0026] Based on the first aspect, in an optional implementation, before the device or the optoelectronic conversion module assigns the first compensation parameter to the optoelectronic conversion module, the method further includes: the device or the optoelectronic conversion module obtains a second link parameter of the second transmission link, where the second link parameter is used to compensate for the electrical signal transmitted by the second transmission link, and the first compensation parameter is less than the second link parameter.

[0027] This implementation method enables distributed compensation of the transmission link by the device and the optoelectronic conversion module based on the first link parameters and the second link parameters, thereby reducing the burden on the device to compensate for the second transmission link, effectively improving the signal quality of the optical signal output by the optoelectronic conversion module, suppressing ISI, reducing the bit error rate, and ensuring the successful transmission of the service.

[0028] Based on the first aspect, in an optional implementation, the first link parameter is the maximum value of multiple insertion losses corresponding to the first transmission link, and / or the second link parameter is the maximum value of multiple insertion losses corresponding to the second transmission link.

[0029] With this implementation, ISI can be suppressed to the greatest extent by using a first link parameter based on the maximum value of multiple insertion losses corresponding to the first transmission link and a second link parameter based on the maximum value of multiple insertion losses corresponding to the second transmission link.

[0030] Based on the first aspect, in an optional implementation, before the device sends the second electrical signal to the optoelectronic conversion module, the method further includes: obtaining, by the device, a nonlinear parameter from the optoelectronic conversion module, where the nonlinear parameter corresponds to the first compensation parameter and is related to a nonlinear characteristic of the transmission link; and performing nonlinear compensation on the first electrical signal or the second electrical signal based on the nonlinear parameter. The nonlinear parameter may be a level shift parameter or a pattern dependent lookup table (PD_LUT) parameter.

[0031] With this implementation, the nonlinear characteristic increases the ISI of the electrical signal transmitted by the transmission link. The device performs nonlinear compensation on the first electrical signal or the second electrical signal based on the nonlinear parameter obtained from the optoelectronic conversion module to suppress ISI, reduce the bit error rate, and ensure the successful transmission of the service.

[0032] In a second aspect, an embodiment of the present application provides a signal transmission method, the method comprising: an optoelectronic conversion module receiving a first compensation parameter from a device, or the optoelectronic conversion module assigning the first compensation parameter to the optoelectronic conversion module, the first compensation parameter being less than a link parameter of a transmission link, the link parameter being used to compensate for an electrical signal transmitted by the transmission link, the transmission link comprising a first transmission link and a second transmission link, the device comprising a processing chip and a connector, the optoelectronic conversion module comprising an electro-optical conversion chip, the first transmission link being from the connector to the electro-optical conversion chip, and the second transmission link being from the processing chip to the connector; the optoelectronic conversion module receiving a second electrical signal from the device; the optoelectronic conversion module compensating the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; the optoelectronic conversion module performing electro-optical conversion on the third electrical signal to obtain an optical signal, and the optoelectronic conversion module emitting the optical signal.

[0033] For the description of the beneficial effects of this aspect, please refer to the first aspect and the details will not be repeated here.

[0034] Based on the second aspect, in an optional implementation, after the photoelectric conversion module receives the first compensation parameter from the device, the method also includes: the photoelectric conversion module sends a first coefficient set to the device, and the first coefficient set is in a pre-stored list of the photoelectric conversion module, corresponding to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, the first coefficient set is used to obtain P tap coefficients, the M and the P are respectively any integers greater than 1, and the first coefficient set is used to compensate the first electrical signal to obtain the second electrical signal.

[0035] Based on the second aspect, in an optional implementation, after the photoelectric conversion module assigns the first compensation parameter to the photoelectric conversion module, the method also includes: the photoelectric conversion module obtains a second coefficient set from the device, and the second coefficient set is used to obtain P tap coefficients, where P is an arbitrary integer greater than 1; the photoelectric conversion module convolves the first coefficient set and the second coefficient set to obtain a third coefficient set, and the first coefficient set is in a pre-stored list of the photoelectric conversion module, corresponding to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, and the first coefficient set is used to obtain P tap coefficients, where M is an arbitrary integer greater than 1; the photoelectric conversion module sends the third coefficient set to the device, and the third coefficient set is used to compensate the first electrical signal to obtain the second electrical signal.

[0036] Based on the second aspect, in an optional implementation, before the photoelectric conversion module receives the second electrical signal from the device, the method also includes: the photoelectric conversion module assigns a second compensation parameter to the device, the second compensation parameter is less than the link parameter, the second compensation parameter corresponds to a second coefficient set, the second coefficient set is used to obtain P tap coefficients, and the second coefficient set is used to compensate the first electrical signal to obtain the second electrical signal.

[0037] Based on the second aspect, in an optional implementation, the photoelectric conversion module receives a first compensation parameter from the device, or after the photoelectric conversion module assigns the first compensation parameter to the photoelectric conversion module, the method further includes: the photoelectric conversion module sends a nonlinear parameter to the device, the nonlinear parameter corresponds to the first compensation parameter, the nonlinear parameter is related to the nonlinear characteristics of the transmission link, and the nonlinear parameter is used to perform nonlinear compensation on the electrical signal transmitted by the transmission link.

[0038] In a third aspect, an embodiment of the present application provides a signal transmission method, the method comprising: a device compensates a first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, the second compensation parameter being less than a link parameter of a transmission link, the link parameter being used to compensate for the electrical signal transmitted by the transmission link, the transmission link comprising a first transmission link and a second transmission link, the device comprising a processing chip and a connector, the optoelectronic conversion module comprising an electro-optical conversion chip, the first transmission link being from the connector to the electro-optical conversion chip, the second transmission link being from the processing chip to the connector; the device sending the second electrical signal to the optoelectronic conversion module.

[0039] For the description of the beneficial effects of this aspect, please refer to the first aspect and the details will not be repeated here.

[0040] Based on the third aspect, in an optional implementation, before the device compensates the first electrical signal according to the second compensation parameter to obtain the compensated second electrical signal, the method also includes: the device assigns a first compensation parameter to the optoelectronic conversion module, and the first compensation parameter is less than the link parameter of the transmission link; or, the device sends the second link parameter of the second transmission link to the optoelectronic conversion module, and the second link parameter is used to compensate for the electrical signal transmitted by the second transmission link, and the second link parameter is used to obtain the first compensation parameter; or, the device sends the link parameter to the optoelectronic conversion module.

[0041] Based on the third aspect, in an optional implementation, before the device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, the method also includes: the device obtains a first coefficient set from the photoelectric conversion module, and the first coefficient set is used to obtain P tap coefficients; the device convolves the first coefficient set and the second coefficient set to obtain a third coefficient set, the second coefficient set corresponds to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1.

[0042] Based on the third aspect, in an optional implementation, before the device compensates the first electrical signal according to the second compensation parameter to obtain the compensated second electrical signal, the method also includes: the device sends a second coefficient set to the photoelectric conversion module, the second coefficient set corresponds to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1; the device obtains a third coefficient set from the photoelectric conversion module, and the third coefficient set is used to obtain P tap coefficients.

[0043] Based on the third aspect, in an optional implementation, the device compensates the first electrical signal according to the second compensation parameter to obtain the compensated second electrical signal, including: the FFE of the device compensates the first electrical signal according to the third coefficient set to obtain the second electrical signal.

[0044] Based on the third aspect, in an optional implementation method, the device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, including: the device obtains the second compensation parameter, and the second compensation parameter is less than the link parameter; the device obtains a second coefficient set corresponding to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1; the FFE of the device compensates the first electrical signal according to the second coefficient set to obtain the second electrical signal.

[0045] Based on the third aspect, in an optional implementation, before the device sends the second electrical signal to the optoelectronic conversion module, the method also includes: the device obtains a nonlinear parameter from the optoelectronic conversion module, and the nonlinear parameter is related to the nonlinear characteristics of the transmission link; the device performs nonlinear compensation on the first electrical signal or the second electrical signal according to the nonlinear parameter.

[0046] In a fourth aspect, an embodiment of the present application provides a communication system, which includes an outer shell, a fixed device and an optoelectronic conversion module, the device including a processing chip and a connector, the optoelectronic conversion module including a compensation module, an electro-optical conversion chip and an output optical fiber connected in sequence, the optoelectronic conversion module also includes a control chip connected to the compensation module and the electro-optical conversion chip respectively, the processing chip is connected to the compensation module through the connector; the processing chip or the control chip is used to assign a first compensation parameter to the compensation module, the first compensation parameter is less than the link parameter of the transmission link, the link parameter is used to compensate for the electrical signal transmitted by the transmission link, the transmission chain The circuit includes a first transmission link and a second transmission link, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; the processing chip is used to compensate the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, and the second compensation parameter is less than the link parameter of the transmission link; the processing chip is used to send the second electrical signal to the compensation module through the connector; the compensation module is used to compensate the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; the electro-optical conversion chip is used to perform electro-optical conversion on the third electrical signal to obtain an optical signal; and the output optical fiber is used to emit the optical signal.

[0047] For the description of the beneficial effects of this aspect, please refer to the first aspect and the details will not be repeated here.

[0048] In a fifth aspect, an embodiment of the present application provides an optoelectronic conversion module, which includes a compensation module, an electro-optical conversion chip, and an output optical fiber connected in sequence. The optoelectronic conversion module also includes a control chip connected to the compensation module and the electro-optical conversion chip, respectively, and the compensation module is connected to the connector of the device; the compensation module is used to receive a first compensation parameter from the device through the connector, or the control chip is used to assign the first compensation parameter to the compensation module, the first compensation parameter is less than the link parameter of the transmission link, and the link parameter is used to compensate for the electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, the device also includes a processing chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; the compensation module is also used to receive a second electrical signal from the device through the connector, and compensate the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; the electro-optical conversion chip is used to perform electro-optical conversion on the third electrical signal to obtain an optical signal; the output optical fiber is used to emit the optical signal.

[0049] For the description of the beneficial effects of this aspect, please refer to the first aspect and the details will not be repeated here.

[0050] In the sixth aspect, an embodiment of the present application provides a device, which includes an outer shell, which fixes the device, and the device includes a processing chip and a connector, and the processing chip is connected to the optoelectronic conversion module through the connector; the processing chip is used to compensate the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, and the second compensation parameter is less than the link parameter of the transmission link, and the link parameter is used to compensate for the electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, and the optoelectronic conversion module includes an electro-optical conversion chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; the processing chip is also used to send the second electrical signal to the optoelectronic conversion module through the connector.

[0051] For the description of the beneficial effects of this aspect, please refer to the first aspect and the details will not be repeated here.

[0052] In the seventh aspect, an embodiment of the present application provides a digital processing chip, including a processing chip and a memory, the memory and the processing chip are interconnected by lines, instructions are stored in the memory, and the processing chip is used to execute the method in any one of the embodiments of the first to third aspects.

[0053] In an eighth aspect, an embodiment of the present application provides a computer storage medium comprising instructions, which, when executed on a computer, enables the computer to execute the method in any one of the embodiments of the first to third aspects above.

[0054] In a ninth aspect, an embodiment of the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method in any one of the embodiments of the first to third aspects above.

[0055] In the tenth aspect, an embodiment of the present application provides an optical network, which includes a first device and a second device, the first device is used to send an optical signal to the second device, and the first device is as shown in any embodiment of the fourth aspect or the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] FIG1 is a diagram showing an example of the structure of an optical network;

[0057] FIG2 is a diagram illustrating a first embodiment of a communication system provided by the present application;

[0058] FIG3 is a flowchart of a first embodiment of a signal transmission method provided by the present application;

[0059] FIG4 is a comparative example diagram of an eye diagram of an optical signal emitted by a photoelectric conversion module provided by the present application and an eye diagram of an optical signal emitted by a photoelectric conversion module provided by an existing solution;

[0060] FIG5 is a flowchart of a second embodiment of a signal transmission method provided by the present application;

[0061] FIG6 is a flowchart of a third embodiment of a signal transmission method provided by the present application;

[0062] FIG7 is a flowchart of a fourth embodiment of a signal transmission method provided by the present application;

[0063] FIG8 is a diagram illustrating a second embodiment of the communication system provided by the present application;

[0064] FIG9 is a flowchart of a fifth embodiment of a signal transmission method provided by the present application;

[0065] FIG10 is a flowchart of a sixth embodiment of a signal transmission method provided by the present application;

[0066] FIG11 is a diagram illustrating a third embodiment of the communication system provided by the present application;

[0067] FIG12 is a structural diagram of a fourth embodiment of a communication system provided by the present application;

[0068] FIG13 is a diagram illustrating a fifth embodiment of the communication system provided by the present application;

[0069] FIG14 is a diagram illustrating a sixth embodiment of the communication system provided by the present application;

[0070] FIG15a is a diagram illustrating a first packaging structure of a photoelectric conversion module provided in the present application;

[0071] FIG15 b is a diagram illustrating a second packaging structure of a photoelectric conversion module provided in the present application;

[0072] FIG15c is a diagram illustrating a third packaging structure of the photoelectric conversion module provided in this application;

[0073] FIG15d is a diagram illustrating a third packaging structure of the photoelectric conversion module provided in this application;

[0074] FIG15e is a diagram illustrating a fourth packaging structure of a photoelectric conversion module provided in this application;

[0075] FIG15f is a diagram illustrating a fifth packaging structure of the photoelectric conversion module provided in this application;

[0076] FIG16 is a diagram illustrating an exemplary structure of a TX interface of a device provided in this application;

[0077] FIG17 is a structural diagram illustrating an embodiment of a compensation module of a photoelectric conversion module provided in the present application. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0079] The embodiment of the present application provides a signal transmission method that can effectively suppress the ISI of the signal, reduce the bit error rate, and improve the signal quality of the signal. The optical network and communication system to which the method shown in this embodiment is applied are described below in conjunction with Figure 1. The optical network 100 includes a first communication system 101 and a second communication system 102, and the first communication system 101 and the second communication system 102 are connected by optical fiber. This example does not limit the number of communication systems included in the optical network 100. For example, the first communication system 101 can be connected to multiple second communication systems 102 through an optical splitter. This example does not limit the networking type of the optical network. For example, the optical network can adopt a ring network or a star network. This example does not limit the network type to which the optical network 100 is applied. For example, if the optical network 100 shown in this example is applied to a passive optical network (PON), one of the first communication system 101 and the second communication system 102 may be an optical network unit (ONU) or an optical network terminal (ONT), and the other of the first communication system 101 and the second communication system 102 may be an optical line terminal (OLT). If the optical network 100 is applied to an optical transport network (OTN), both the first communication system 101 and the second communication system 102 may be OTN devices. The optical network 100 shown in this example may also be applied to a data center network (DCN) or a metropolitan area network, etc., without specific limitation. Taking the first communication system 101 as an example, this example does not limit the device type of the first communication system 101. For example, the first communication system 101 can be an optical transmission device, an optical access device, a router, a switch, a wireless base station, a wireless remote access device, a wireless baseband signal processing device, etc. It can also be a computing server (usually referred to as a server), a high-performance computer (HPC), a storage server, or a memory resource pool. This example does not limit the type of the first communication system 101, as long as the first communication system 101 has an electro-optical conversion function and an optical interface that can be connected to an optical fiber. For the description of the type of the second communication system 102, please refer to the description of the first communication system 101, and the details are not repeated here.

[0080] The structures of the first communication system and the second communication system are described in conjunction with Figures 1 and 2. Figure 2 is an example diagram of the structure of the first embodiment of the communication system provided in this application. The communication system shown in Figure 2 takes the first communication system as an example. The first communication system 101 includes a device 200 and one or more optoelectronic conversion modules 210. The optoelectronic conversion module may also be referred to as an optical transceiver module or an optical module, etc. This example does not limit the number of devices 200 included in the first communication system 101. The device 200 and the first communication system 101 are integrated devices, or the device 200 is an independent pluggable single board. This example does not limit the number of optoelectronic conversion modules 210 included in the first communication system 101. The optoelectronic conversion module 210 can be integrated with the device 200 or can be plugged into a single board of the device 200, etc., and there is no specific limitation. Specifically, the device 200 has packaged a processing chip 201 and a connector 203. The processing chip 201 may be one or more chips, or one or more integrated circuits. For example, the processing chip 201 can be one or more optical digital signal processors (oDSPs), field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), system on chips (SoCs), central processor units (CPUs), network processors (NPs), microcontroller units (MCUs), programmable logic devices (PLDs), network card chips, storage interface chips, or other integrated chips, or any combination of the above chips, or processing modules, etc., and the details are not repeated here. The processing chip 201 has a TX interface 202, which is connected to a connector 203. The connector 203 is used to provide an electrical interface that realizes a pluggable electrical connection with the optoelectronic conversion module 210. The optoelectronic conversion module 210 includes a transmit (TX) channel 211. The transmit channel 211 includes a compensation module 212, an electro-optical conversion chip 213, and an output optical fiber 214 connected in sequence. The electrical-to-optical conversion chip 213 performs electrical-to-optical conversion on the electrical signal from the compensation module 212 .For example, the electro-optical conversion chip 213 may employ a direct modulation laser (DML), an electro-absorption modulated laser (EML), or a vertical cavity surface emitting laser (VCSEL). Alternatively, the electro-optical conversion chip 213 may employ a structure comprising a laser and a modulator, wherein the modulator may be a Mach-Zehnder modulator (MZM) or a micro-ring modulator (MRM).

[0081] Based on Figures 1 and 2, the following describes the execution process of the signal transmission method in combination with various embodiments. Figure 3 is a flow chart of the steps of the first embodiment of the signal transmission method provided by the present application.

[0082] Step 301: The device allocates a first compensation parameter to a photoelectric conversion module.

[0083] After the photoelectric conversion module is plugged into the connector of the device and powered on, the device can allocate the first compensation parameter. The following are several optional examples of how the device allocates the first compensation parameter:

[0084] Allocation Example 1

[0085] First, the device obtains link parameters.

[0086] Specifically, the optoelectronic conversion module has pre-stored first link parameters for the first transmission link. As shown in Figure 2, the input end of the first transmission link is where the optoelectronic conversion module 210 is electrically connected to the connector 203. The output end of the first transmission link is where the electro-optical conversion chip 213 is connected to the output optical fiber 214. It should be understood that the description of the first transmission link in this embodiment is an optional example and is not intended to be limiting. As long as the first transmission link transmits an electrical signal from the device 200 and transmits an optical signal obtained by electro-optical conversion of the electrical signal, and the optical signal is emitted from the optoelectronic conversion module 210 via the first transmission link, it is sufficient. The first link parameters can be obtained through testing of the optoelectronic conversion module before shipment, or by simulating the various hardware components of the first transmission link. The various hardware components of the first transmission link may include a printed circuit board (PCB), the high-speed signal trace structure of the PCB, its width, and thickness, etc., and are not specifically limited. In this embodiment, the first link parameter is taken as the insertion loss introduced during signal transmission via the first transmission link. The description of the first link parameters in this embodiment is an optional example and is not intended to be limiting. For example, the first link parameter may also be a time domain impulse response coefficient or a frequency domain impulse response coefficient. The time domain impulse response coefficient refers to a time domain response coefficient obtained during the transmission of the signal via the first transmission link. The frequency domain impulse response coefficient refers to a frequency domain response coefficient obtained during the transmission of the signal via the first transmission link.

[0087] The device has pre-stored the second link parameters of the second transmission link. As shown in Figure 2, the input end of the second transmission link is the TX interface 202, which is connected to the connector 203 via the communication bus. The output end of the second transmission link is the location where the communication bus is electrically connected to the connector 203. It should be clear that the description of the second transmission link in this embodiment is an optional example. As long as the second transmission link transmits the electrical signal from the processing chip 201 and transmits the electrical signal to the connector 203, it can be used. For the description of the device storing the second link parameters, please refer to the description of the photoelectric conversion module storing the first link parameters, and no further details are given. For the description of the second link parameters, please refer to the description of the first link parameters, and no further details are given.

[0088] The device obtains the second link parameter from the register of the processing chip 201 and the first link parameter from the register of the optoelectronic conversion module. The device obtains the link parameter based on the first link parameter and the second link parameter, wherein the link parameter is greater than or equal to the sum of the first link parameter and the second link parameter.

[0089] The description of the way in which the device obtains the link parameters shown in this example is an optional example and is not limiting. For example, the device may also pre-store the link parameters. When the device needs to allocate the first compensation parameter, the device directly obtains the stored link parameters.

[0090] Next, the device obtains a first compensation parameter according to the link parameter.

[0091] After the device obtains the link parameters, it obtains the first compensation parameters according to the preset allocation ratio. The allocation process is shown in Table 1:

[0092] Table 1

[0093] As shown in Table 1, the device obtains a first compensation parameter = link parameter * Q1, where Q1 is any value greater than 0 and less than 1. This embodiment does not limit the specific value of Q1. For example, Q1 can be 50%, or 40%. This embodiment uses the value of Q1 of 50% as an example for illustrative purposes. For example, if the device obtains a first compensation parameter of 14 decibels (dB), the device determines the first compensation parameter to be 7 dB. The device sends the first compensation parameter to the optoelectronic conversion module. It will be understood that the first compensation parameter shown in this embodiment is less than the link parameter.

[0094] Allocation Example 2

[0095] This allocation example uses the allocation algorithm to allocate the first compensation parameter. For instructions on how the device in this example obtains the link parameter, please refer to Allocation Example 1, and the details are not repeated here.

[0096] First, the photoelectric conversion module obtains the parameters shown in Table 2 to allocate the first compensation parameters.

[0097] Table 2

[0098] Specifically, the optoelectronic conversion module obtains the link parameter B for maximum compensation of the optoelectronic conversion module. The optoelectronic conversion module obtains the link parameter A for maximum compensation of the device TX interface. The optoelectronic conversion module obtains the link parameter C. The optoelectronic conversion module obtains the first compensation parameter X according to the first allocation algorithm, where X is the closest to C*B / (A+B).

[0099] In this embodiment, the optoelectronic conversion module can compensate the electrical signal transmitted by the first transmission link based on the first compensation parameter. Specifically, the optoelectronic conversion module amplifies high-frequency signals and attenuates low-frequency signals in the electrical signal transmitted by the first transmission link based on the first compensation parameter, thereby suppressing ISI in the electrical signal transmitted by the first transmission link.

[0100] Step 302: The photoelectric conversion module obtains a first coefficient set.

[0101] After receiving the first compensation parameter, the optoelectronic conversion module shown in this embodiment obtains a continuous time linear equalizer (CTLE) gear corresponding to the first compensation parameter. As shown in FIG2 , the compensation module 212 of the optoelectronic conversion module includes a CTLE. The optoelectronic conversion module compensates the electrical signal from the device through the CTLE. Different CTLE gears determine the frequency response (frequency response) of the compensated electrical signal output from the CTLE, which can be simply referred to as the frequency response or frequency response curve. The frequency response of an electrical signal refers to the curve of how the gain of the electrical signal changes with frequency. When the optoelectronic conversion module obtains the first compensation parameter, the CTLE gear corresponding to the first compensation parameter can be obtained. For example, when the first compensation parameter is 7dB, the optoelectronic conversion module obtains a CTLE gear corresponding to the first compensation parameter of 7. This example illustrates that when the CTLE is configured with a CTLE gear of 7, the CTLE can compensate for the 7dB insertion loss caused by the transmission of the electrical signal by the first transmission link. It should be noted that the description of the specific correspondence between the first compensation parameter and the CTLE gear position in this embodiment is an optional example and is not limiting. As long as the optoelectronic conversion module has pre-established correspondences between different first compensation parameters and CTLE gear positions, this embodiment does not limit the number of CTLE gear positions included in the CTLE of the optoelectronic conversion module; for example, 11 different CTLE gear positions may be included.

[0102] When the photoelectric conversion module has obtained the CTLE gear, the corresponding first coefficient set can be obtained by querying the pre-stored list shown in Table 3.

[0103] Table 3

[0104] The pre-stored table shown in Table 3 establishes a correspondence between the CTLE level of the photoelectric conversion module and different coefficient sets. The CTLE level of the photoelectric conversion module corresponds to the first compensation parameter. For example, when the first compensation parameter is 7dB, the corresponding CTLE level of the photoelectric conversion module in the pre-stored table in Table 3 is 7. This embodiment uses the example of the corresponding first compensation parameter and CTLE level being equal. In other examples, the corresponding first compensation parameter and CTLE level may also have different values. This embodiment uses the example of establishing a correspondence between different first compensation parameters and coefficient sets based on the CTLE level of the photoelectric conversion module in the pre-stored table. In other examples, the pre-stored table shown in Table 3 can directly establish a correspondence between different first compensation parameters and coefficient sets, and this is not limited in this embodiment. The pre-stored table shown in this embodiment includes M coefficient sets. In this embodiment, M is taken as 11 as an example. The value of M is not limited, as long as M is any integer greater than 1.

[0105] Each coefficient set in the pre-stored list includes N tap coefficients. In this embodiment, N is taken as an example. The specific value of N is not limited as long as N is any integer greater than 1. The device's feed forward equalizer (FFE) uses the tap coefficients to compensate the electrical signal to be sent to the optoelectronic conversion module to reduce the ISI caused by the second transmission link. It can be understood that the different coefficient sets shown in Table 3 include different N tap coefficients, and different N tap coefficients can enable the device's FFE to perform different compensation. For example, when the optoelectronic conversion module shown in this embodiment receives a first compensation parameter (e.g., 7dB), the corresponding first coefficient set is obtained in Table 3. The first coefficient set includes 7 tap coefficients, namely 0.0019, 0.0095, -0.086, 0.6841, 0.1665, 0.0382, and 0.0138.

[0106] The description of the pre-stored list in this embodiment is an optional example and is not limited thereto. As long as the pre-stored list creates correspondences between different first compensation parameters and coefficient sets, the pre-stored list shown in this embodiment can be shown in Table 4:

[0107] Table 4

[0108] The pre-stored list shown in Table 4 creates a correspondence between the first compensation parameter and the coefficient set at different temperatures. Among them, the first temperature (the ambient temperature in which the photoelectric conversion module is currently located is a low-temperature environment) refers to a temperature between -5 degrees Celsius and 20 degrees Celsius. The second temperature (the ambient temperature in which the photoelectric conversion module is currently located is a normal temperature environment) refers to a temperature between 20 degrees Celsius and 40 degrees Celsius. The third temperature (the ambient temperature in which the photoelectric conversion module is currently located is a high-temperature environment) refers to above 40 degrees Celsius. The photoelectric conversion module shown in this embodiment can also be integrated with a temperature sensor for detecting the ambient temperature in which the photoelectric conversion module is currently located. If the first compensation parameter obtained by the photoelectric conversion module is 7 dB, and the ambient temperature detected by the temperature sensor is 25 degrees Celsius, then the photoelectric conversion module determines that the current temperature is at the second temperature shown in Table 4. The photoelectric conversion module then obtains the first coefficient set corresponding to the first compensation parameter (7 dB) and the ambient temperature (25 degrees Celsius) in the pre-stored list shown in Table 4, which are 0.0019, 0.0095, -0.086, 0.6841, 0.1665, 0.0382, and 0.0138, respectively.

[0109] Because the optoelectronic conversion module exhibits inconsistent channel responses for signals transmitted through the transmission link under different ambient temperatures, in order to accurately compensate for the signal and reduce ISI in the transmission link, the optoelectronic conversion module obtains a first coefficient set corresponding to the first compensation parameter and the current ambient temperature based on the pre-stored table shown in Table 4. The transmission links include the first transmission link and the second transmission link shown above.

[0110] After obtaining the first coefficient set, the photoelectric conversion module shown in this embodiment stores the obtained first coefficient set in the register of the photoelectric conversion module in the data structure shown in Table 5.

[0111] Table 5

[0112] It can be understood that Table 5 stores the correspondence between different tap coefficients and corresponding tap positions in the first coefficient set for use in FFE compensation on the device side. It should be clarified that only one of the seven taps is the maximum value and is defined as the main tap. The taps before and after the main tap are called pre tap and post tap, respectively. The number of pre taps and post taps can be determined based on the compensation requirements of the transmission link, and post tap is not mandatory. The number of pre taps and post taps is equal. Table 5 only uses the example of equal pre taps and post taps, each with three.

[0113] Step 303: The device obtains a first coefficient set from the photoelectric conversion module.

[0114] After obtaining the first coefficient set shown in Table 5, the photoelectric conversion module writes the first coefficient set into the register. The device reads the first coefficient set shown in Table 5 from the register of the control chip through the communication bus.

[0115] Step 304: The device obtains a second coefficient set.

[0116] The device described in this embodiment pre-stores a second coefficient set. The second coefficient set includes P tap coefficients, where P is any integer greater than 1. The second coefficient set described in this embodiment corresponds to a second compensation parameter, which is less than the link parameter described above. The second coefficient set corresponding to the second compensation parameter means that the device compensates for the electrical signal transmitted by the second transmission link according to the P tap coefficients included in the second coefficient set, thereby achieving compensation for the second compensation parameter for the second transmission link. For example, if the second compensation parameter is insertion loss of 7 dB, then the device compensates for the electrical signal transmitted by the second transmission link according to the P tap coefficients included in the second coefficient set, thereby compensating for the 7 dB insertion loss of the second transmission link. The sum of the first compensation parameter and the second compensation parameter described in this embodiment is not less than the link parameter. As can be seen from the above description, the first coefficient set includes N tap coefficients. This embodiment uses the example of N and P being equal. In other examples, the values ​​of N and P may differ and are not limited to this. This embodiment uses the example of N and P both being 7. For example, the second coefficient set shown in this embodiment includes tap coefficients of -0.0018, 0.0044, -0.0489, 0.5738, -0.3021, 0.0407, and -0.0284, respectively.

[0117] Step 305: The device obtains a third coefficient set according to the first coefficient set and the second coefficient set.

[0118] When the device obtains the first coefficient set and the second coefficient set, the device convolves the first coefficient set and the second coefficient set, and extracts P (e.g., P=7) tap coefficients in the middle as the third coefficient set. For example, the third coefficient set obtained by the device convolving the first coefficient set and the second coefficient set can be shown in Table 6:

[0119] Table 6

[0120] It can be understood that the third coefficient set obtained by the device includes 7 tap coefficients, namely -0.0015, 0.0181, -0.1304, 0.6310, -0.1792, 0.0019, and -0.0250.

[0121] Step 306: The device compensates the first electrical signal to obtain a compensated second electrical signal.

[0122] The device obtains a first electrical signal to be sent to the optoelectronic conversion module. This embodiment does not limit the code type of the first electrical signal. For example, the code type of the first electrical signal can be non-return to zero (NRZ), pulse amplitude modulation (PAM) 2, PAM4, PAM6, PAM8, phase shift keying (PSK), binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), or quadrature amplitude modulation (QAM). This embodiment takes an electrical signal with a rate of 112 gigabits per second (Gbps) and a code type of PAM4 as an example.

[0123] When the device has obtained the third coefficient set shown in Table 6, it compensates the first electrical signal based on the third coefficient set. Specifically, the device's TX interface includes an FFE. The FFE compensates the first electrical signal based on the third coefficient set to obtain a compensated second electrical signal. When transmitted on the device's second transmit link, the first electrical signal experiences high-frequency distortion (phase and amplitude), which can cause ISI. The FFE's compensation of the first electrical signal based on the third coefficient set can suppress ISI and other distortions. For example, the FFE compensates for channel attenuation in the second transmit link by boosting the high frequencies of the first electrical signal. The third coefficient set shown in this embodiment includes seven tap coefficients. Therefore, the FFE has seven inputs, namely, seven sequentially transmitted bits of the first electrical signal. These seven sequentially input bits are vin(n-3), vin(n-2), vin(n-1), vin(n), vin(n+1), vin(n+2), and vin(n+3). The FFE sums these seven bits according to a certain weight and outputs them as the second electrical signal. The second electrical signal vout(n)=(C-3)vin(n-3)+(C-2)vin(n-2)+(C-1)vin(n-1)+Cvin(n)+C(n+1)vin(n+1)+C(n+2)vin(n+2)+C(n+3)vin(n+3). Wherein, C-3 refers to the tap coefficient corresponding to the tap position TAP1 in Table 6, that is, -0.0015, C-2 refers to the tap coefficient corresponding to the tap position TAP2 in Table 6, that is, 0.0181, and so on. C+3 refers to the tap coefficient corresponding to the tap position TAP7 in Table 6, that is, -0.0250.

[0124] Step 307: The device sends a second electrical signal to the photoelectric conversion module.

[0125] The TX interface of the device compensates the first electrical signal to obtain a second electrical signal, and the TX interface sends the second electrical signal to the photoelectric conversion module through the connector.

[0126] Step 308: The photoelectric conversion module compensates the second electrical signal to obtain a compensated third electrical signal.

[0127] As can be seen from step 302, the optoelectronic conversion module has configured the CTLE gear according to the first coefficient set. Therefore, the CTLE, with the configured CTLE gear, can compensate the second electrical signal to obtain the third electrical signal. For a description of CTLE gear-based compensation, please refer to step 302 and will not be further elaborated here.

[0128] Step 309: The optoelectronic conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and emits the optical signal.

[0129] Continuing with FIG2 , compensation module 212 compensates the second electrical signal to obtain a third electrical signal, and transmits the third electrical signal to electro-optical conversion chip 213. Electro-optical conversion chip 213 performs electro-optical conversion on the third electrical signal to obtain an optical signal. Electro-optical conversion chip 213 transmits the optical signal to output optical fiber 214, which then passes through the output optical fiber and is output from optoelectronic conversion module 210.

[0130] 3 , the device allocates the first compensation parameter based on the link parameters of the transmission link as an example, which is not limited to the specific example. For example, the device may also allocate the first compensation parameter directly based on the second link parameters of the device's second transmission link.

[0131] First, the device obtains a second link parameter (eg, 12 dB) of a second transmission link.

[0132] Then, the device allocates a first compensation parameter (e.g., 5dB) to the optoelectronic conversion module based on the second link parameter. It is understandable that the device allocates the first compensation parameter directly based on its own second link parameter (e.g., 12dB) to ensure that the first compensation parameter is less than the second link parameter. It is understandable that if the device compensates for the 12dB insertion loss of the second transmission link alone, the burden will be heavy, which will increase the ISI of the electrical signal transmitted by the second transmission link. For this reason, the device adopts a distributed compensation method to reduce the insertion loss compensated by the device. In this example, the device allows the optoelectronic conversion module to share 5dB of the 12dB, while the device shares 7dB of the 12dB, effectively reducing the burden of the device compensating for the second transmission link and improving the signal quality.

[0133] Then, the photoelectric conversion module reads the register to obtain a first compensation parameter that the photoelectric conversion module needs to compensate for the electrical signal transmitted by the first transmission link.

[0134] Then, the photoelectric conversion module compensates the second electrical signal according to the first compensation parameter to obtain a third electrical signal. The process of the photoelectric conversion module compensating the second electrical signal according to the first compensation parameter is shown in step 308 above and will not be described in detail.

[0135] Optionally, if the optoelectronic conversion module itself needs to compensate the electrical signal transmitted by the first transmission link by a third compensation parameter (e.g., 1 dB), the optoelectronic conversion module obtains a fourth compensation parameter based on the first compensation parameter and the third compensation parameter, where the fourth compensation parameter is the sum of the first compensation parameter and the fourth compensation parameter. For example, the fourth compensation parameter shown in this example is 5dB + 1dB = 6dB. The 5dB (i.e., the first compensation parameter) is the parameter that the optoelectronic conversion module compensates for the electrical signal transmitted by the second transmission link of the device, and the 1dB (i.e., the third compensation parameter) is the parameter that the optoelectronic conversion module itself needs to compensate for the electrical signal.

[0136] Then, the photoelectric conversion module compensates the second electrical signal according to the fourth compensation parameter to obtain a third electrical signal. For the process of the photoelectric conversion module compensating the second electrical signal according to the fourth compensation parameter, please refer to the process of the photoelectric conversion module compensating the second electrical signal according to the first compensation parameter shown in the above step 308, and the details will not be repeated.

[0137] Multiple photoelectric conversion modules can be inserted into the device shown in this embodiment, and each photoelectric conversion module can include multiple TX channels. The process of performing signal transmission between each TX channel of each photoelectric conversion module and the device can be seen in Figure 3, and the details are not repeated here.

[0138] Using the method shown in this embodiment, to compensate for the electrical signal transmitted by the transmission link (including the first transmission link and the second transmission link), the device obtains the link parameters required to compensate for the electrical signal transmitted by the transmission link, and uses a distributed compensation method to distribute the first compensation parameter to the optoelectronic conversion module. Based on the distributed compensation method, the device and the optoelectronic conversion module jointly compensate for the electrical signal transmitted by the transmission link. In addition, the optoelectronic conversion module has pre-stored multiple coefficient sets. The optoelectronic conversion module sends the first coefficient set to the device based on the first compensation parameter. The device obtains the second coefficient set and convolves the first coefficient set and the second coefficient set to obtain a third coefficient set. The FFE of the device is compensated by the third coefficient set, effectively reducing the ISI of the electrical signal transmitted by the transmission link and improving the signal quality.

[0139] Because the present embodiment adopts a distributed compensation method for the electrical signal transmitted by the transmission link, that is, the compensation of the electrical signal transmitted by the first transmission link by the optoelectronic conversion module and the compensation of the electrical signal transmitted by the second transmission link by the device, the signal quality of the optical signal output by the optoelectronic conversion module is effectively improved, and ISI is effectively suppressed, ensuring that the optical signal output by the optoelectronic conversion module meets the requirements of relevant standards, such as the index requirements defined by the Institute of Electrical and Electronics Engineers (IEEE). The method shown in this embodiment can effectively improve the transmitter dispersion eye closure cost (transmitter and dispersion eye closure for PAM4, TDECQ) of the optical signal output by the optoelectronic conversion module. In this example, the output optical fiber can be connected to an optical eye diagram instrument. The optical eye diagram instrument receives the optical signal from the optoelectronic conversion module through the output optical fiber and simulates the optical signal to obtain the TDECQ index and the corresponding eye diagram. The following is an explanation in conjunction with Table 7:

[0140] Table 7

[0141] The tap systems of the third coefficient set obtained by the method shown in this embodiment are -0.0015, 0.0181, -0.1304, 0.6310, -0.1792, 0.0019, and -0.0250 (as shown in Table 6). When both the device and the optoelectronic conversion module compensate for the electrical signal, the TDECQ index obtained by the optical eye diagram simulation is 1.05. The IEEE802.3 specification requires TDECQ<3.4. Therefore, the method shown in this embodiment is used to make the TDECQ index of the optical signal meet the IEEE802.3 specification requirements. In the existing solution, only the device compensates for the electrical signal transmitted by the second transmission link, and the optoelectronic conversion module only performs electrical-to-optical conversion on the electrical signal from the device to output an optical signal. The optical eye diagram simulates the optical signal output by the optoelectronic conversion module in the existing solution and obtains a TDECQ index of 3.7. It can be seen that the TDECQ index of the optical signal output by the optoelectronic conversion module in the existing solution does not meet the IEEE802.3 specification requirements. It can be understood that the method shown in this embodiment effectively improves the TDECQ index compared to the existing solution, that is, effectively improves the signal quality of the optical signal output by the optoelectronic conversion module shown in this embodiment.

[0142] Due to the method shown in this embodiment, the signal quality of the optical signal emitted by the communication system (for example, the first communication system shown in Figure 1) can be effectively improved. The second communication system on the receiving side receives the optical signal from the first communication system, effectively avoiding the situation in which the second communication system suffers from serious bit errors or interruption of the service carried by the optical signal due to the deterioration of the signal quality of the optical signal.

[0143] Figure 4 is a comparative example of an eye diagram of an optical signal emitted by the optoelectronic conversion module provided in this application and an eye diagram of an optical signal emitted by an optoelectronic conversion module provided in an existing solution. An optical eye diagram instrument receives an optical signal output by the optoelectronic conversion module shown in the existing solution to obtain a first eye diagram 401. The horizontal axis of the first eye diagram 401 represents time, and the vertical axis represents voltage amplitude. The optical eye diagram instrument receives an optical signal using the solution shown in this embodiment to obtain a second eye diagram 402. The first eye diagram 401 has a first eye opening 403, and the second eye diagram 402 has a second eye opening 404. As shown in Figure 4, the first eye opening 403 is smaller than the second eye opening 404. The eye opening reflects the noise on the signal; that is, the size of the eye opening reflects the strength of the ISI. A larger eye opening and a more positive eye diagram indicate smaller ISI, while a smaller eye opening indicates larger ISI. By comparing the first eye diagram 401 and the second eye diagram 402 , it can be seen that the method shown in this embodiment effectively improves the eye opening of the eye diagram compared to the existing photoelectric conversion module, and the eye diagram morphology is more correct, which effectively reduces ISI and improves the signal quality of the optical signal emitted by the photoelectric conversion module.

[0144] Through the embodiment shown in Figure 3, it is hoped that the amplitude-frequency response curve (the horizontal axis is frequency and the vertical axis is amplitude) of the optical signal emitted by the optoelectronic conversion module is a flat straight line, that is, the amplitude of the output optical signal at each frequency point is the same or approximately the same. However, considering that the optical signal emitted by the optoelectronic conversion module is affected by factors such as dispersion, multipath interference (MPI), or nonlinearity during transmission through the optical fiber, in order to ensure that the optical signal has good quality in the receiving-side optoelectronic conversion module, such as a low bit error rate, the device can obtain the corresponding insertion loss (i.e., the third link parameter) based on the characteristics of the optoelectronic conversion module and / or the link characteristics of the optical fiber, and obtain multiple tap coefficients corresponding to the third link parameter. The device convolves the third coefficient set with the multiple tap coefficients corresponding to the third link parameter to obtain multiple target tap coefficients. The device compensates the first electrical signal according to the target tap coefficient to obtain the second electrical signal. In this example, the amplitude-frequency response curve of the optical signal output by the optoelectronic conversion module is not a flat straight line. The non-linear amplitude-frequency response curve can compensate for dispersion, MPI, and nonlinearity during optical signal transmission through the optical fiber, thereby improving the quality of the optical signal received by the optoelectronic conversion module on the receiving side.

[0145] In the example shown in FIG3 , the first coefficient set includes N tap coefficients, and the second coefficient set includes P tap coefficients. The device obtains the P tap coefficients for compensation based on the first coefficient set and the second coefficient set. In the embodiment shown in FIG5 , the device obtains the tap coefficients for compensating the electrical signal in a manner different from that shown in FIG3 . FIG5 is a flowchart of the steps of a second embodiment of the signal transmission method provided by the present application.

[0146] Step 501: The device allocates a first compensation parameter to a photoelectric conversion module.

[0147] The execution process of step 501 shown in this embodiment can also refer to the corresponding step 301 shown in Figure 3, and the details are not repeated here.

[0148] Step 502: The photoelectric conversion module obtains a first time-domain impulse response coefficient.

[0149] After receiving the first compensation parameter, the photoelectric conversion module shown in this embodiment obtains a first coefficient set corresponding to the first compensation parameter. The first coefficient set shown in this embodiment includes first time-domain impulse response coefficients. Specifically, the photoelectric conversion module has pre-established correspondences between different first compensation parameters and different first coefficient sets. Therefore, after receiving the first compensation parameter from the device, the photoelectric conversion module can obtain the corresponding first coefficient set. The first time-domain impulse response coefficients included in the first coefficient set are described below:

[0150] The optoelectronic conversion module first obtains the frequency domain parameters corresponding to the first transmission link when transmitting electrical signals at different frequency points. The frequency domain parameters include amplitude-frequency response parameters and phase-frequency response parameters. The frequency domain parameters can be obtained through simulation or testing based on the hardware of the first transmission link (such as the PCB board material included in the first transmission link, the routing structure, width, thickness, etc. of the high-speed signal line included in the first transmission link). Specifically, for example, the optoelectronic conversion module stores frequency domain parameters corresponding to more than 100 frequency points. When the optoelectronic conversion module obtains the first compensation parameter, the optoelectronic conversion module obtains the frequency domain parameter corresponding to the first compensation parameter, and performs an inverse Fourier transform on the frequency domain parameter corresponding to the first compensation parameter to obtain the first time domain pulse response coefficient. Optionally, the optoelectronic conversion module shown in this embodiment can also directly store the correspondence between the first compensation parameter and the first time domain pulse response coefficient. Then, when the optoelectronic conversion module obtains the first compensation parameter, the first time domain pulse response coefficient corresponding to the first compensation parameter is directly obtained.

[0151] Step 503: The device obtains a first time-domain impulse response coefficient from the photoelectric conversion module.

[0152] The photoelectric conversion module calculates the first time domain pulse response coefficient and writes the first time domain pulse response coefficient into a register. The device reads the first time domain pulse response coefficient from the register of the control chip via the communication bus.

[0153] Step 504: The device obtains a third coefficient set according to the first time-domain impulse response coefficient and the second time-domain impulse response coefficient.

[0154] The device obtains a second time domain pulse response coefficient. The second time domain pulse response coefficient shown in this embodiment is obtained through simulation or testing based on the hardware of the second transmission link (such as the PCB board material included in the second transmission link, the routing structure, width, thickness, etc. of the high-speed signal line included in the second transmission link). For example, the device can obtain the frequency domain parameters of the second transmission link. For the description of the frequency domain parameters of the second transmission link, please refer to the description of the frequency domain parameters of the first transmission link, and the details are not repeated here. The device then performs an inverse Fourier transform on the frequency domain parameters of the second transmission link to obtain the second time domain pulse response coefficient. For another example, the register of the device directly stores the second time domain pulse response coefficient. When executing this step, the device directly reads the second time domain pulse response coefficient from the register.

[0155] When the device obtains the first time-domain impulse response coefficient and the second time-domain impulse response coefficient, the device convolves the first time-domain impulse response coefficient and the second time-domain impulse response coefficient, and solves the inverse thereof to obtain a fourth coefficient set. The fourth coefficient set may include multiple tap coefficients. The device may also perform length truncation processing on the fourth coefficient set to obtain a third coefficient set, so that the third coefficient set includes P tap coefficients in the fourth coefficient set. The truncation principle is as follows: 1. If P tap coefficients are required to compensate the second transmission link, P tap coefficients are truncated from the fourth coefficient set, and the P tap coefficients are continuous coefficients in the fourth coefficient set. 2. The tap coefficient located at the center of the P tap coefficients is the maximum value in the fourth coefficient set.

[0156] Step 505: The device compensates the first electrical signal to obtain a compensated second electrical signal.

[0157] Step 506: The device sends a second electrical signal to the photoelectric conversion module.

[0158] Step 507: The photoelectric conversion module compensates the second electrical signal to obtain a compensated third electrical signal.

[0159] Step 508: The optoelectronic conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and emits the optical signal.

[0160] For the execution process of steps 505 to 508 shown in this embodiment, please refer to steps 306 to 309 corresponding to FIG. 3 , and detailed description is omitted.

[0161] Using the method described in this embodiment, the device can calculate a third set of coefficients based on the second time-domain impulse response coefficients stored in the device and the first time-domain impulse response coefficients from the optoelectronic conversion module. The device then compensates the first electrical signal based on the third set of coefficients to obtain a second electrical signal, effectively reducing ISI in the electrical signal transmitted by the transmit link and improving signal quality.

[0162] In the embodiment corresponding to FIG3 , the photoelectric conversion module returns only the first set of coefficients to the device based on the first compensation parameter. In the embodiment shown in FIG6 , the photoelectric conversion module can return the first set of coefficients and parameters for compensating for the nonlinear characteristics of the transmission link to the device based on the first compensation parameter. FIG6 is a flowchart of the steps of the third embodiment of the signal transmission method provided by the present application.

[0163] Step 601: The device allocates a first compensation parameter to a photoelectric conversion module.

[0164] Step 602: The photoelectric conversion module obtains a first coefficient set.

[0165] For the specific execution process of step 601 to step 602 shown in this embodiment, please refer to step 301 to step 302 shown in Figure 3, and the details are not repeated here.

[0166] Step 603: The photoelectric conversion module obtains nonlinear parameters.

[0167] In this embodiment, when the optoelectronic conversion module obtains the first compensation parameter, it can obtain a nonlinear parameter corresponding to the first compensation parameter, and the nonlinear parameter is related to the nonlinear characteristics of the transmission link. Among them, the nonlinear characteristic will increase the ISI of the electrical signal transmitted by the transmission link, and the nonlinear characteristic can be introduced by the electro-optical conversion chip of the electro-optical conversion module during the electro-optical conversion process. Specifically, the nonlinear parameter can be a level adjustment (Level_shift) parameter or a pattern dependent lookup table (PD_LUT) parameter, etc. In this embodiment, the nonlinear parameter can be a Level_shift parameter as an example. It should be clear that this embodiment does not limit the type of nonlinear parameter. See Table 8 for details:

[0168] Table 8

[0169] It can be understood that the photoelectric conversion module establishes a correspondence between the CTLE level of the photoelectric conversion module, the coefficient set, and the Level_shift parameter based on the table shown in Table 8. For example, if the photoelectric conversion module obtains a CTLE level of 7 corresponding to the first compensation parameter, then the Level_shift parameters corresponding to CTLE level 7 are 0.1 and -0.1. For a description of the coefficient set shown in this embodiment, please refer to the embodiments corresponding to FIG. 3 or FIG. 5 , and detailed description is omitted here.

[0170] Step 604: The device obtains a first coefficient set and nonlinear parameters from the photoelectric conversion module.

[0171] After obtaining the first coefficient set and the nonlinear parameters, the photoelectric conversion module writes the first coefficient set and the nonlinear parameters into a register of the photoelectric conversion module. The device reads the first coefficient set and the nonlinear parameters from the register of the photoelectric conversion module via a communication bus.

[0172] Step 605: The device obtains a second coefficient set.

[0173] Step 606: The device obtains a third coefficient set according to the first coefficient set and the second coefficient set.

[0174] For the execution process of step 605 to step 606 shown in this embodiment, please refer to the corresponding steps 304 to step 305 in Figure 3, and the specific execution process is not repeated here.

[0175] Step 607: The device obtains updated transmission signal level parameters.

[0176] After the device obtains the Level_shift parameter from the photoelectric conversion module, it can update the stored original transmit signal level parameter to obtain the updated transmit signal level parameter. For details, see Table 9:

[0177] Table 9

[0178] In this embodiment, the device uses the PAM4 code type for the first electrical signal emitted by the device as an example. Based on the original transmitted signal level parameters, the levels of the first electrical signal can be +3, +1, -1, and -3. After receiving the Level_shift parameter, the device updates the levels of the first electrical signal to +3, 0.9, -0.9, and -3, respectively, based on the Level_shift parameter. Therefore, the device updates the levels of the first electrical signal from +3, +1, -1, and -3 to +3, 0.9, -0.9, and -3.

[0179] Step 608: The device performs nonlinear compensation on the first electrical signal according to the updated transmission signal level parameter to obtain an updated first electrical signal.

[0180] The device shown in this embodiment performs nonlinear compensation on the level of the first electrical signal based on the updated transmit signal level parameter to obtain an updated first electrical signal. For example, the level +1 in the first electrical signal is updated to the level 0.9 in the updated first electrical signal. For details, see Table 9 and are not further described.

[0181] Step 609: The device compensates the updated first electrical signal to obtain a compensated second electrical signal.

[0182] The execution process of step 609 shown in this embodiment can be found in step 306 corresponding to FIG3 , and detailed description is omitted.

[0183] This embodiment uses the example of a device first performing nonlinear compensation on the first electrical signal based on the information shown in Table 9 to obtain an updated first electrical signal, and then compensating the updated first electrical signal based on the FFE of the device to obtain a compensated second electrical signal. In other examples, the device may first compensate the first electrical signal based on the FFE to obtain a second electrical signal, and then perform nonlinear compensation on the second electrical signal based on the information shown in Table 9 to obtain an updated second electrical signal.

[0184] Step 610: The device sends a second electrical signal to the photoelectric conversion module.

[0185] Step 611: The photoelectric conversion module compensates the second electrical signal to obtain a compensated third electrical signal.

[0186] Step 612: The optoelectronic conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and emits the optical signal.

[0187] For the description of the execution process of step 610 to step 612 shown in this embodiment, please refer to the corresponding steps 307 to step 309 in Figure 3, and the details are not repeated here.

[0188] Multiple optoelectronic conversion modules can be installed on the device shown in this embodiment, and each optoelectronic conversion module can include multiple TX channels. The process of performing signal transmission between each TX channel of each optoelectronic conversion module and the device can be seen in Figure 6, and the details are not repeated here.

[0189] By using the method shown in this embodiment, the device can perform nonlinear compensation on the electrical signal transmitted by the second transmission link based on the nonlinear parameters from the optoelectronic conversion module, thereby effectively suppressing the ISI of the transmission link and improving the signal quality of the optical signal emitted by the optoelectronic conversion module.

[0190] In the embodiments shown in Figures 3 and 6 , to achieve distributed compensation of the transmission link by the device and the optoelectronic conversion module, the optoelectronic conversion module needs to store a large amount of data as shown in Table 3 or Table 4, which occupies a large amount of space resources in the optoelectronic conversion module registers. In the embodiment shown in Figure 7 , when the device and the optoelectronic conversion module perform distributed compensation of the transmission link, the space resources occupied by the optoelectronic conversion module registers are effectively reduced, reducing the time consumed by the device and the optoelectronic conversion module to execute the signal transmission method. Figure 7 is a flowchart of the steps of the fourth embodiment of the signal transmission method provided by this application.

[0191] Step 701: The device allocates a first compensation parameter to the photoelectric conversion module and allocates a second compensation parameter to the device.

[0192] The device shown in this embodiment needs to allocate not only the first compensation parameter to the photoelectric conversion module, but also the second compensation parameter to the device. The specific allocation example is as follows:

[0193] Allocation Example 1

[0194] First, the device obtains link parameters. For the description of how the device in this embodiment obtains link parameters, please refer to step 301 corresponding to FIG. 3 , and detailed description is omitted.

[0195] Next, the device obtains a first compensation parameter and a second compensation parameter according to the link parameter.

[0196] After the device obtains the link parameters, it obtains the first compensation parameter and the second compensation parameter according to the preset allocation ratio. The allocation process is shown in Table 10:

[0197] Table 10

[0198] As shown in Table 10, the device obtains a first compensation parameter = link parameter * Q1, a second compensation parameter = link parameter * Q2, and Q1 + Q2 = 1. This embodiment does not limit the specific values ​​of Q1 and Q2. For example, Q1 and Q2 are both 50%. For another example, Q1 is 40% and Q2 is 60%. This embodiment uses the example of Q1 and Q2 both being 50% as an example for illustrative explanation. For example, if the device obtains a first compensation parameter of 14 decibels (dB), then the device determines that the first compensation parameter and the second compensation parameter are both 7dB. The device sends the first compensation parameter to the optoelectronic conversion module. It can be understood that the first compensation parameter and the second compensation parameter shown in this embodiment are both less than the link parameter.

[0199] Allocation Example 2

[0200] This allocation example uses an allocation algorithm to allocate link parameters as first compensation parameters and second compensation parameters. For instructions on how the device in this example obtains link parameters, see Allocation Example 1, and the details are omitted here.

[0201] First, the photoelectric conversion module obtains the parameters shown in Table 2. Specifically, the photoelectric conversion module obtains a first compensation parameter X according to a first allocation algorithm, where X is the value closest to C*B / (A+B). The photoelectric conversion module obtains a second compensation parameter Y according to a second allocation algorithm, where Y=CX. The description of the allocation algorithm in this example is optional and not limiting.

[0202] In this embodiment, the device can compensate for the electrical signal transmitted by the second transmission link based on the second compensation parameter. Specifically, the device amplifies high-frequency signals and attenuates low-frequency signals in the electrical signal transmitted by the second transmission link based on the second compensation parameter, thereby suppressing ISI in the electrical signal transmitted by the second transmission link.

[0203] It should be noted that after obtaining the first compensation parameter, the device sends the first compensation parameter to the photoelectric conversion module. After obtaining the second compensation parameter, the device stores the second compensation parameter in the register of the processing chip. This embodiment does not limit the timing of the device sending the first compensation parameter to the photoelectric conversion module and storing the second compensation parameter in the register of the processing chip.

[0204] Step 702: The device compensates the first electrical signal to obtain a compensated second electrical signal.

[0205] In this embodiment, the device has established a correspondence between different second compensation parameters and the second coefficient set. This embodiment takes the second coefficient set including N tap coefficients as an example. For an explanation of the second coefficient set including N tap coefficients, please refer to the embodiment corresponding to FIG3 , and the details are not repeated here. The device shown in this embodiment can store the correspondence shown in Table 11:

[0206] Table 11

[0207] When the device obtains a second compensation parameter of 7dB, the corresponding second coefficient set includes tap coefficients of 0.0019, 0.0095, -0.086, 0.6841, 0.1665, 0.0382, and 0.0138, respectively. Then, the FFE of the device compensates the first electrical signal according to the second coefficient set corresponding to the second compensation parameter to obtain the second electrical signal. For the specific process of the device compensating the first electrical signal according to the second coefficient set corresponding to the second compensation parameter to obtain the second electrical signal, please refer to the process of the device compensating the first electrical signal according to the third coefficient set to obtain the second signal, as shown in step 306 of FIG. The details are not repeated here.

[0208] Step 703: The device sends a second electrical signal to the photoelectric conversion module.

[0209] For the execution process of step 703 shown in this embodiment, please refer to the corresponding step 307 in Figure 3, and the details are not repeated here.

[0210] Step 704: The photoelectric conversion module compensates the second electrical signal to obtain a compensated third electrical signal.

[0211] The optoelectronic conversion module in this embodiment configures the CTLE gear according to the first compensation parameter. The CTLE, with the configured CTLE gear, can then compensate the second electrical signal to obtain a third electrical signal. For a description of CTLE gear-based compensation, see steps 302 and 308; details are omitted here.

[0212] Step 705: The optoelectronic conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and emits the optical signal.

[0213] The execution process of step 705 shown in this embodiment is shown in step 309 corresponding to FIG3 , and the details are not repeated here.

[0214] Multiple photoelectric conversion modules can be inserted into the device shown in this embodiment, and each photoelectric conversion module can include multiple TX channels. The process of performing signal transmission between each TX channel of each photoelectric conversion module and the device can be seen in Figure 7, and the details are not repeated here.

[0215] The method described in this embodiment enables distributed compensation of the transmission link by the device and the optoelectronic conversion module, effectively improving the signal quality of the optical signal output by the optoelectronic conversion module and suppressing ISI. Furthermore, during the compensation process, the optoelectronic conversion module does not need to store excessive data, reducing the space resources occupied by the optoelectronic conversion module registers. The optoelectronic conversion module directly compensates the second electrical signal based on the first compensation parameter received from the device, and the device directly compensates the first electrical signal based on the second compensation parameter, reducing the time consumed by the device and the optoelectronic conversion module to execute the signal transmission method.

[0216] The above embodiment takes the device as an example of allocating the first compensation parameter. In the following embodiment, the photoelectric conversion module is responsible for allocating the first compensation parameter. Figure 8 is a structural example diagram of the second embodiment of the communication system provided by this application. The communication system 800 shown in this embodiment includes a device 805 and one or more photoelectric conversion modules 810. The device 805 has encapsulated a processing chip 801, a computing unit 804, and a connector 803. For the description of the processing chip 801 and the connector 803, please refer to the corresponding description of Figure 2, and the details are not repeated here. The computing unit 804 is connected to the processing chip 801. For the description of the type of computing unit 804 shown in this embodiment, please refer to the description of the type of processing chip 801, and the details are not repeated here. Optionally, the processing chip 801 can integrate the computing unit 804. The photoelectric conversion module 810 includes a TX channel 811. The transmission channel 811 includes a compensation module 812, an electro-optical conversion chip 813, and an output optical fiber 814 connected in sequence. For the description of the TX channel 811, please refer to the corresponding description of Figure 2, and the details are not repeated here. The photoelectric conversion module 810 further includes a control chip 815 connected to the compensation module 812, the electro-optical conversion chip 813, and the computing unit 804. Optionally, the control chip 815 may integrate the compensation module 812. For a description of the type of the control chip 815, refer to the description of the type of the processing chip 801, and the details are not repeated here.

[0217] It can be understood that the photoelectric conversion module shown in this embodiment includes a control chip 815, and the photoelectric conversion module implements the allocation of the first compensation parameter based on the control chip 815. The specific execution process is shown in Figure 9, where Figure 9 is a step flow chart of the fifth embodiment of the signal transmission method provided in this application.

[0218] Step 901: The photoelectric conversion module distributes a first compensation parameter to the photoelectric conversion module.

[0219] After the photoelectric conversion module is plugged into the connector of the device and powered on, the control chip of the photoelectric conversion module can obtain the link parameters and allocate the first compensation parameters based on the link parameters. For an explanation of the link parameters, please refer to step 301 corresponding to FIG3 , which will not be described in detail. For example, the computing unit of the device reads the second link parameters from the register of the processing chip and sends them to the control chip of the photoelectric conversion module via the communication bus. The control chip obtains the first link parameters stored in the register. The control chip can obtain the link parameters based on the first link parameters and the second link parameters. For an explanation of how the control chip of the photoelectric conversion module allocates the first compensation parameters based on the link parameters, please refer to the explanation of how the device allocates the first compensation parameters shown in step 301 corresponding to FIG3 , which will not be described in detail.

[0220] Step 902: The photoelectric conversion module obtains a first coefficient set.

[0221] For the execution process of step 902 shown in this embodiment, please refer to the corresponding step 302 in Figure 3, and the details are not repeated here.

[0222] Step 903: The photoelectric conversion module obtains a second coefficient set from the device.

[0223] For an explanation of the second coefficient set shown in this embodiment, please refer to step 304 corresponding to FIG3 , and detailed description is omitted here. In this embodiment, the calculation unit reads the second coefficient set from the register of the processing chip and sends the second coefficient set to the control chip of the photoelectric conversion module via the communication bus.

[0224] Step 904: The photoelectric conversion module obtains a third coefficient set according to the first coefficient set and the second coefficient set.

[0225] When the photoelectric conversion module obtains the first coefficient set and the second coefficient set, the photoelectric conversion module convolves the first coefficient set and the second coefficient set to obtain a third coefficient set. For instructions on how the photoelectric conversion module obtains the third coefficient set in this embodiment, please refer to the instructions for how the device obtains the third coefficient set as shown in step 305 of FIG. 3 , and details are not repeated here.

[0226] Step 905: The device obtains a third coefficient set from the photoelectric conversion module.

[0227] The control chip of the photoelectric conversion module stores the third coefficient set in a register and sends the third coefficient set to the calculation unit via the communication bus. The processing chip of the device reads the third coefficient set from the calculation unit.

[0228] The device shown in this embodiment can also obtain nonlinear parameters from the photoelectric conversion module. For the description of the linear parameters and the description of the device performing nonlinear compensation based on the nonlinear parameters, please refer to the corresponding description of Figure 6, and the details are not repeated here.

[0229] In this embodiment, the first coefficient set includes N tap coefficients and the second coefficient set includes P tap coefficients. For example, the third coefficient set obtained by convolving the first coefficient set and the second coefficient set includes P tap coefficients. For the specific process, please refer to the corresponding description of Figure 3, and no further details are given. Optionally, the first coefficient set includes a first time-domain impulse response coefficient, the second coefficient set includes a second time-domain impulse response coefficient, and the photoelectric conversion module convolves the first time-domain impulse response coefficient and the second time-domain impulse response coefficient to obtain the third coefficient set. Please refer to the description of the process of obtaining the corresponding third coefficient set based on the first time-domain impulse response coefficient and the second time-domain impulse response coefficient shown in Figure 5, and no further details are given.

[0230] Step 906: The device compensates the first electrical signal to obtain a compensated second electrical signal.

[0231] Step 907: The device sends a second electrical signal to the photoelectric conversion module.

[0232] Step 908: The photoelectric conversion module compensates the second electrical signal to obtain a compensated third electrical signal.

[0233] Step 909: The optoelectronic conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and emits the optical signal.

[0234] For the description of the execution process of step 906 to step 909 shown in this embodiment, please refer to the corresponding steps 306 to step 309 in Figure 3, and the details are not repeated here.

[0235] Multiple optoelectronic conversion modules can be inserted into the device shown in this embodiment, and each optoelectronic conversion module can include multiple TX channels. The process of performing signal transmission between each TX channel of each optoelectronic conversion module and the device can be seen in Figure 9, and the details are not repeated here.

[0236] Using the method shown in this embodiment, to compensate for the electrical signals transmitted by the transmission link (including the first transmission link and the second transmission link), the optoelectronic conversion module obtains the link parameters required to compensate for the electrical signals transmitted by the transmission link and distributes the first compensation parameters to the optoelectronic conversion module using a distributed compensation method. Based on the distributed compensation method, the device and the optoelectronic conversion module jointly compensate for the electrical signals transmitted by the transmission link. Furthermore, the optoelectronic conversion module obtains a second coefficient set from the device and convolves the first coefficient set and the second coefficient set to obtain a third coefficient set. The optoelectronic conversion module then sends this coefficient set to the device. The FFE of the device is compensated using the third coefficient set, effectively reducing the ISI of the electrical signals transmitted by the transmission link and improving signal quality.

[0237] For example, a device is equipped with X optoelectronic conversion modules. In this example, X is set to 128. If the device is responsible for allocating the first compensation parameter to the 128 optoelectronic conversion modules, the device needs to perform serial calculations for the 128 optoelectronic conversion modules to allocate the first compensation parameter. For example, the device performs calculations for the first optoelectronic conversion module among the 128 optoelectronic conversion modules to allocate the first compensation parameter to the first optoelectronic conversion module. The device and the first optoelectronic conversion module jointly compensate for the electrical signal transmitted by the transmission link. Then, the device performs calculations for the second optoelectronic conversion module among the 128 optoelectronic conversion modules to allocate the first compensation parameter to the second optoelectronic conversion module. The device and the second optoelectronic conversion module jointly compensate for the electrical signal transmitted by the transmission link. This continues in this order until the device performs calculations for the last optoelectronic conversion module among the 128 optoelectronic conversion modules to allocate the first compensation parameter to the last optoelectronic conversion module. It can be understood that the device greatly reduces the computational efficiency of allocating the first compensation parameter to the device and the 128 photoelectric conversion modules through serial calculation for the 128 photoelectric conversion modules, and increases the time required for the 128 photoelectric conversion modules to emit light signals.

[0238] However, using the method shown in this embodiment, each of the 128 photoelectric conversion modules independently allocates the first compensation parameter for calculation. In this way, the serial calculation of the 128 photoelectric conversion modules shown in the above example is changed to the parallel calculation of the 128 photoelectric conversion modules shown in this embodiment. The method shown in this embodiment greatly improves the calculation efficiency of allocating the first compensation parameter and reduces the time required for the 128 photoelectric conversion modules to emit light signals.

[0239] In the embodiment shown in FIG9 , to achieve joint compensation of the transmission link by the device and the optoelectronic conversion module, the optoelectronic conversion module needs to store a large amount of data as shown in Table 3 or Table 4, which occupies a large amount of space resources in the registers of the optoelectronic conversion module. In the embodiment shown in FIG10 , when the device and the optoelectronic conversion module jointly compensate for the electrical signal transmitted by the transmission link, the space resources occupied by the registers of the optoelectronic conversion module are effectively reduced, and the time consumed by the device and the optoelectronic conversion module to execute the signal transmission method is reduced. FIG10 is a flowchart of the steps of the sixth embodiment of the signal transmission method provided by the present application.

[0240] Step 1001: The photoelectric conversion module allocates a first compensation parameter to the photoelectric conversion module and allocates a second compensation parameter to the device.

[0241] For the description of the execution process of step 1001 shown in this embodiment, please refer to step 901 corresponding to Figure 9, and the details are not repeated here.

[0242] Step 1002: The device compensates the first electrical signal to obtain a compensated second electrical signal.

[0243] Step 1003: The device sends a second electrical signal to the photoelectric conversion module.

[0244] Step 1004: The photoelectric conversion module compensates the second electrical signal to obtain a compensated third electrical signal.

[0245] Step 1005: The optoelectronic conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and emits the optical signal.

[0246] For the execution process of steps 1002 to 1005 shown in this embodiment, please refer to steps 702 to 705 corresponding to FIG. 7 , and detailed description is omitted.

[0247] Multiple optoelectronic conversion modules can be inserted into the device shown in this embodiment, and each optoelectronic conversion module can include multiple TX channels. The process of performing signal transmission between each TX channel of each optoelectronic conversion module and the device can be seen in Figure 10, and the details are not repeated here.

[0248] The method described in this embodiment enables distributed compensation of the transmission link by the device and the optoelectronic conversion module, effectively improving the signal quality of the optical signal output by the optoelectronic conversion module and effectively suppressing ISI. Furthermore, during the compensation process, the optoelectronic conversion module does not need to store excessive data, reducing the space resources occupied by the optoelectronic conversion module registers. Furthermore, the optoelectronic conversion module directly compensates the second electrical signal based on the first compensation parameter from the device, and the device directly compensates the first electrical signal based on the second compensation parameter, reducing the time consumed by the device and the optoelectronic conversion module to execute the signal transmission method. The method described in this embodiment, in which the optoelectronic conversion module allocates the first and second compensation parameters, improves the computational efficiency of allocating the first and second compensation parameters and reduces the time required for the optoelectronic conversion module included in the communication system to emit an optical signal.

[0249] The structure of the photoelectric conversion module provided in the embodiment of the present application is described below. The photoelectric conversion module can be a single-channel transmission module. Specifically, as shown in Figure 2 or Figure 8, the photoelectric conversion module only includes a TX channel. As shown in Figure 11, Figure 11 is an example diagram of the structure of the third embodiment of the communication system provided by the present application. The communication system shown in Figure 11 includes a device 1106 and a photoelectric conversion module 1100. The device 1106 includes a processing chip 1101, a TX interface 1102, a calculation unit 1104, and a connector 1103. Please refer to the corresponding description of Figure 2 or Figure 8 for details. The photoelectric conversion module 1110 shown in this embodiment is a dual-channel transceiver module. Specifically, the photoelectric conversion module 1100 includes a TX channel 1120 and a receive (RX) channel 1130. Please refer to the corresponding description of Figure 2 or Figure 8 for details. The RX channel 1130 specifically includes an input optical fiber 1131, a photoelectric conversion chip 1132, and an amplifier 1133. Among them, the amplifier 1133 and the photoelectric conversion chip 1132 are connected to the control chip 1113. For the description of the control chip 1113, please refer to the corresponding description of Figure 8, and no further details are given. The amplifier 1133 is connected to the connector 1103, and the connector 1103 is connected to the RX interface 1105 of the processing chip 1101. Among them, the photoelectric conversion chip 1132 is used to receive the optical signal from the input optical fiber 1131 and perform photoelectric conversion on the optical signal to obtain an electrical signal. The photoelectric conversion chip 1132 can use a photodiode (positive intrinsic-negative, PIN) or an avalanche photo diode (APD). The amplifier 1133 is used to amplify the power of the electrical signal from the photoelectric conversion chip 1132 to obtain an amplified electrical signal. The amplifier 1133 can be a trans-impedance amplifier (TIA). The amplifier 1133 sends the amplified electrical signal to the RX interface 1105 of the processing chip 1101 through the connector 1103.

[0250] The photoelectric conversion module shown in this embodiment can also be a multi-channel parallel transceiver module. Figure 12 is an example diagram of the structure of the fourth embodiment of the communication system provided by this application. The communication system 1200 shown in this embodiment includes a device 1210 and multiple TX channels and multiple RX channels connected to the device 1210. For a description of the TX channel and RX channel structure, please refer to Figure 11, and the details are not repeated here. This embodiment does not limit the number of TX channels and the number of RX channels included in the photoelectric conversion module 1220.

[0251] The optoelectronic conversion module shown in this embodiment can also be a single-fiber bidirectional module. Figure 13 is an example diagram of the structure of the fifth embodiment of the communication system provided by this application. The communication system 1300 shown in this embodiment includes a device 1310 and an optoelectronic conversion module 1320 connected to the device 1310. The optoelectronic conversion module 1320 includes a TX channel and an RX channel. For the description of the TX channel and the RX channel structure, please refer to Figure 11, and the details are not repeated here. The optoelectronic conversion module 1320 shown in this embodiment also includes a wavelength division multiplexer (WDM) 1330, which is used to couple the optical signal output by the TX channel to the optical cable 1331, and to couple the optical signal from the optical cable 1331 to the RX channel. This embodiment does not limit the number of TX channels, RX channels and WDMs included in the optoelectronic conversion module 1320, as long as each WDM is connected to at least one TX channel and at least one RX channel.

[0252] The optoelectronic conversion module shown in this embodiment can also be a wavelength division multiplexing transceiver module. Figure 14 is an example diagram of the structure of the sixth embodiment of the communication system provided by this application. The communication system 1400 shown in this embodiment includes a device 1410 and an optoelectronic conversion module 1420. The optoelectronic conversion module 1420 includes a TX channel and an RX channel. For the description of the TX channel and the RX channel structure, please refer to Figure 11, and the details are not repeated here. The optoelectronic conversion module 1420 shown in this embodiment also includes a WDM1421 connected to multiple TX channels. The WDM1421 is used to merge the multiple optical signals output by the multiple TX channels into one multiplexed optical signal, and couple the multiplexed optical signal to the output optical cable 1422. The optoelectronic conversion module 1420 also includes a WDM1423 connected to multiple RX channels. The WDM1423 is used to demultiplex the multiplexed optical signal from the input optical cable 1424 into multiple optical signals. The WDM1423 transmits the multiple optical signals to multiple RX channels respectively. This embodiment does not limit the number of TX channels connected to the WDM and the number of RX channels connected to the WDM.

[0253] The structure of the photoelectric conversion module for executing the above-mentioned method embodiments can be any example in Figures 2, 8, 11, 12, 13 and 14, or a combination of at least two examples in Figures 2, 8, 11, 12, 13 and 14, without specific limitation.

[0254] This embodiment does not limit the packaging type of the photoelectric conversion module, as shown in Figure 15a, for example, Figure 15a is an example diagram of the first packaging structure of the photoelectric conversion module provided in this application. The outer shell 1501 of the communication system shown in this example has a panel 1502. A device is fixed inside the outer shell 1501, and the device specifically includes a PCB and a processing chip and a connector encapsulated on the PCB. For a description of the device, please refer to the description of Figure 2 or Figure 8, and no further details are given. One or more photoelectric conversion modules can be plugged and connected to the panel 1502, and the one or more photoelectric conversion modules are electrically connected to the connector. The wiring of the PCB is used to electrically connect the connector and the processing chip to realize the transmission of high-speed electrical signals (such as the second electrical signal shown in the above method embodiment) between the photoelectric conversion module and the processing chip.

[0255] Figure 15b is an example diagram of the second packaging structure of the optoelectronic conversion module provided by this application. The outer shell 1501 of the communication system shown in this example has a panel 1502. A device is fixed inside the outer shell 1501, and the device specifically includes a PCB and a processing chip, a connector, and an electrical relay chip encapsulated on the PCB. For the description of the device, please refer to the description of Figure 15a, and no further details are given. One or more optoelectronic conversion modules can be plugged and connected to the panel 1502, and the one or more optoelectronic conversion modules are electrically connected to the connector. The wiring of the PCB is used to electrically connect the processing chip, the electrical relay chip, and the electrical connection in sequence. Then, the light-speed electrical signal output by the processing chip (for example, the second electrical signal shown in the above method embodiment) is transmitted to the electrical relay chip. After the electrical relay chip regenerates and relays the second electrical signal, it is transmitted to the electrical connection through the wiring of the PCB, and the electrical connection transmits the second electrical signal to the optoelectronic conversion module. The second transmission link shown in this example is from the output port of the electrical relay chip to the output port of the connector.

[0256] Figure 15c is an example diagram of the third packaging structure of the optoelectronic conversion module provided in this application. The outer shell 1501 of the communication system shown in this example has a panel 1502. A device is fixed inside the outer shell 1501, and the device specifically includes a PCB and a processing chip packaged on the PCB and a cable connector, etc. One or more optoelectronic conversion modules can be plugged and connected to the panel 1502, and the one or more optoelectronic conversion modules are electrically connected to the connector. The cable connector packaged on the PCB is used to electrically connect the processing chip and the connector, so that the high-speed electrical signal between the processing chip and the connector is transferred to the low-insertion-loss high-speed cable 1503 through the cable connector for transmission. The packaging form of the optoelectronic conversion module shown in this example can be an optical transceiver board (OTB).

[0257] Figure 15d is an example diagram of the third packaging structure of the optoelectronic conversion module provided in this application. The outer shell 1501 of the communication system shown in this example has a panel 1502. A device is fixed inside the outer shell 1501, and the device specifically includes a PCB and a processing chip and a connector packaged on the PCB. The optoelectronic conversion module shown in this embodiment is pluggable within the board, that is, the optoelectronic conversion module is fixed to the PCB through a connector, rather than being pluggable with the panel 1502. The optical fiber connected to the optoelectronic conversion module is led out from the panel 1502. Then, the processing chip transmits high-speed electrical signals (such as the second electrical signal shown in the above method embodiment) between the PCB traces and the electrical connections. The packaging form of the optoelectronic conversion module shown in this example can be a near package optics (NPO).

[0258] Figure 15e is an example diagram of the fourth packaging structure of the optoelectronic conversion module provided in this application. The outer shell 1501 of the communication system shown in this example has a panel 1502. A device is fixed inside the outer shell 1501, and the device specifically includes a PCB and a substrate packaged on the PCB, and the substrate is used to package the processing chip and the cable connector. One or more optoelectronic conversion modules can be plugged and connected to the panel 1502, and the one or more optoelectronic conversion modules are electrically connected to the connector. The cable connector is connected to the connector through a high-speed cable 1504. Then, the high-speed electrical signal between the processing chip and the connector is transferred to the low-insertion-loss high-speed cable 1504 through the cable connector for transmission. The packaging form of the optoelectronic conversion module shown in this example can be an on-board optical module (on board optics, OBO) based on optical input and output interface (optical input & output, OIO) technology.

[0259] Figure 15f is an example diagram of the fifth packaging structure of the optoelectronic conversion module provided in this application. The outer shell 1501 of the communication system shown in this example has a panel 1502. A device is fixed inside the outer shell 1501, and the device specifically includes a PCB and a substrate encapsulated on the PCB, and the substrate is used to encapsulate a processing chip and a connector. The connector is electrically connected to one or more optoelectronic conversion modules. The transmission of high-speed electrical signals (such as the second electrical signal of the above-mentioned method embodiment) is achieved between the processing chip and the connector through the substrate routing. The packaging form of the optoelectronic conversion module shown in this example can be a co-packaged optical module (co-package optics, CPO).

[0260] Figure 16 is an example diagram of the structure of an embodiment of the TX interface of the device provided in this application. The TX interface 1600 of the device includes FFE1602, a digital-to-analog converter (DAC) 1603 and a driver amplifier (Driver) 1604. Among them, FFE1602 is used to perform the process of compensating the first electrical signal to obtain the second electrical signal in Figures 3, 5, 6, 7, 9 and 10, and the specific execution process is not repeated. The second electrical signal output by FFE1602 is sent to DAC1603, DAC1603 performs digital-to-analog conversion on the second electrical signal to output the converted second electrical signal, DAC1603 sends the converted second electrical signal to Driver1604, Driver1604 amplifies the power of the converted second electrical signal to obtain the amplified second electrical signal, and sends the amplified second electrical signal to the connector of the device. Optionally, a nonlinear compensation unit 1601 is connected between FFE1602 and the processing chip of the device. Nonlinear compensation unit 1601 performs nonlinear compensation on the first electrical signal from the processing chip to obtain an updated first electrical signal. For an explanation of the nonlinear compensation process performed by nonlinear compensation unit 1601, please refer to 608 corresponding to FIG6 , and the details are not repeated here. The description of the position of nonlinear compensation unit 1601 in this embodiment is an optional example and is not limiting. For example, nonlinear compensation unit 1601 may also be connected between FFE 1602 and DAC 1603. In this case, nonlinear compensation unit 1601 performs nonlinear compensation on the second electrical signal from FFE 1602.

[0261] Figure 17 is an example diagram of the structure of an embodiment of the compensation module of the optoelectronic conversion module provided in this application. The compensation module 1700 shown in this embodiment includes a CTLE 1701 and a Driver 1702 connected in sequence between a connector and an electro-optical conversion chip. Among them, the CTLE 1701 receives a second electrical signal from the device and compensates the second electrical signal to obtain a third electrical signal. For the description of the CTLE 1701 compensating the second electrical signal, please refer to Figures 3, 5, 6, 7, 9 and 10. The process of performing compensation for the second electrical signal to obtain the third electrical signal is not described in detail. Driver 1702 receives the third electrical signal from CTLE 1701 and amplifies the power of the third electrical signal to obtain an amplified third electrical signal. Driver 1702 sends the amplified third electrical signal to the electro-optical conversion chip. The description of the compensation module structure in this embodiment is an optional example and is not limited. For example, the compensation module also includes a low frequency equalizer (LFEQ) and the like.

[0262] The present application also provides an optical network including a first communication system and a second communication system. The first communication system is configured to transmit an optical signal, after compensation by a communication system board and an optoelectronic conversion module, to the second communication system. The specific process of the signal transmission method executed by the first communication system is shown in any of the embodiments of Figures 3, 5, 6, 7, 9, and 10, and is not further described.

[0263] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0264] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0265] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0266] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0267] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

Claims

1. A signal transmission method, characterized in that: The method is applied to a communication system, the communication system includes a device and a photoelectric conversion module, and the method includes: The device or the optoelectronic conversion module allocates a first compensation parameter to the optoelectronic conversion module, the first compensation parameter is less than a link parameter of a transmission link, the link parameter is used to compensate for an electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, the device includes a processing chip and a connector, the optoelectronic conversion module includes an electro-optical conversion chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; The device compensates the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, wherein the second compensation parameter is less than a link parameter of the transmission link; The device sends the second electrical signal to the photoelectric conversion module; The photoelectric conversion module compensates the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; The photoelectric conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and the photoelectric conversion module emits the optical signal.

2. The method according to claim 1, characterized in that After the device assigns the first compensation parameter to the photoelectric conversion module, the method further includes: The device obtains a first coefficient set from the photoelectric conversion module, and the first coefficient set is in a pre-stored list of the photoelectric conversion module, corresponding to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, the first coefficient set is used to obtain P tap coefficients, the M and the P are respectively any integers greater than 1, and the first coefficient set is used to compensate the first electrical signal.

3. The method according to claim 2, characterized in that Before the device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, the method includes: The device convolves the first coefficient set and the second coefficient set to obtain a third coefficient set, the second coefficient set corresponds to the second compensation parameter, the second coefficient set is used to obtain P tap coefficients, and the third coefficient set is used to compensate the first electrical signal.

4. The method according to claim 1, characterized in that: After the photoelectric conversion module assigns the first compensation parameter to the photoelectric conversion module, the method further includes: The photoelectric conversion module obtains a second coefficient set from the device, the second coefficient set corresponds to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1; The photoelectric conversion module convolves the first coefficient set and the second coefficient set to obtain a third coefficient set, the first coefficient set is in a pre-stored list of the photoelectric conversion module, and corresponds to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, the first coefficient set is used to obtain P tap coefficients, and M is any integer greater than 1; The device obtains the third coefficient set from the photoelectric conversion module, and the third coefficient set is used to compensate the first electrical signal.

5. The method according to claim 3 or 4, characterized in that: The device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, comprising: The forward feedback equalizer FFE of the device compensates the first electrical signal according to the third coefficient set to obtain the second electrical signal, and the third coefficient set includes P tap coefficients.

6. The method according to claim 1, characterized in that The device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, comprising: The device obtains a second coefficient set corresponding to the second compensation parameter, where the second coefficient set is used to obtain P tap coefficients, P is any integer greater than 1; The FFE of the device compensates the first electrical signal according to the second set of coefficients to obtain the second electrical signal.

7. The method according to any one of claims 1 to 6, characterized in that: Before the device or the photoelectric conversion module allocates the first compensation parameter to the photoelectric conversion module, the method further includes: The device or the photoelectric conversion module obtains the pre-stored link parameters; or, The device or the optoelectronic conversion module obtains a first link parameter of the first transmission link, where the first link parameter is used to compensate for the electrical signal transmitted by the first transmission link; The device obtains a second link parameter of the second transmission link, where the second link parameter is used to compensate for the electrical signal transmitted by the second transmission link, and the link parameter is greater than or equal to the sum of the first link parameter and the second link parameter.

8. The method according to any one of claims 1 to 6, characterized in that: Before the device or the photoelectric conversion module allocates the first compensation parameter to the photoelectric conversion module, the method further includes: The device or the optoelectronic conversion module obtains a second link parameter of the second transmission link, where the second link parameter is used to compensate for the electrical signal transmitted by the second transmission link, and the first compensation parameter is less than the second link parameter.

9. The method according to any one of claims 1 to 8, characterized in that: Before the device sends the second electrical signal to the photoelectric conversion module, the method further includes: The device obtains a nonlinear parameter from the photoelectric conversion module, the nonlinear parameter corresponds to the first compensation parameter, and the nonlinear parameter is related to a nonlinear characteristic of the transmission link; The device performs nonlinear compensation on the first electrical signal or the second electrical signal according to the nonlinear parameter.

10. A signal transmission method, characterized in that: The method comprises: The photoelectric conversion module receives a first compensation parameter from a device, or the photoelectric conversion module allocates the first compensation parameter to the photoelectric conversion module, the first compensation parameter is less than a link parameter of a transmission link, the link parameter is used to compensate for an electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, the device includes a processing chip and a connector, the photoelectric conversion module includes an electro-optical conversion chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; The photoelectric conversion module receives a second electrical signal from the device; The photoelectric conversion module compensates the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; The photoelectric conversion module performs electrical-to-optical conversion on the third electrical signal to obtain an optical signal, and the photoelectric conversion module emits the optical signal.

11. The method according to claim 10, characterized in that After the photoelectric conversion module receives the first compensation parameter from the device, the method further includes: The photoelectric conversion module sends a first coefficient set to the device, and the first coefficient set is in a pre-stored list of the photoelectric conversion module, corresponding to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, the first coefficient set is one of the M coefficient sets, the first coefficient set is used to obtain P tap coefficients, the M and the P are respectively any integers greater than 1, and the first coefficient set is used to compensate a first electrical signal to obtain the second electrical signal.

12. The method according to claim 10, characterized in that After the photoelectric conversion module assigns the first compensation parameter to the photoelectric conversion module, the method further includes: The photoelectric conversion module obtains a second coefficient set from the device, where the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1; The photoelectric conversion module convolves a first coefficient set and the second coefficient set to obtain a third coefficient set, wherein the first coefficient set is in a pre-stored list of the photoelectric conversion module and corresponds to the first compensation parameter, wherein the pre-stored list includes M coefficient sets, The first coefficient set is one of the M coefficient sets, the first coefficient set is used to obtain P tap coefficients, and M is any integer greater than 1; The photoelectric conversion module sends the third coefficient set to the device, where the third coefficient set is used to compensate the first electrical signal to obtain the second electrical signal.

13. The method according to claim 10, characterized in that Before the photoelectric conversion module receives the second electrical signal from the device, the method further includes: The optoelectronic conversion module assigns a second compensation parameter to the device, the second compensation parameter is less than the link parameter, the second compensation parameter corresponds to a second coefficient set, the second coefficient set is used to obtain P tap coefficients, and the second coefficient set is used to compensate the first electrical signal to obtain the second electrical signal.

14. The method according to any one of claims 10 to 13, characterized in that After the photoelectric conversion module receives the first compensation parameter from the device, or the photoelectric conversion module assigns the first compensation parameter to the photoelectric conversion module, the method further includes: The photoelectric conversion module sends a nonlinear parameter to the device, where the nonlinear parameter corresponds to the first compensation parameter, is related to the nonlinear characteristics of the transmission link, and is used to perform nonlinear compensation on the electrical signal transmitted by the transmission link.

15. A signal transmission method, characterized in that: The method comprises: The device compensates the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, the second compensation parameter is less than a link parameter of a transmission link, the link parameter is used to compensate the electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, the device includes a processing chip and a connector, the optoelectronic conversion module includes an electro-optical conversion chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; The device sends the second electrical signal to the photoelectric conversion module.

16. The method according to claim 15, characterized in that Before the device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, the method further includes: The device allocates a first compensation parameter to the photoelectric conversion module, wherein the first compensation parameter is smaller than a link parameter of the transmission link; or, The device sends a second link parameter of the second transmission link to the photoelectric conversion module, where the second link parameter is used to compensate for the electrical signal transmitted by the second transmission link, and the second link parameter is used to obtain the first compensation parameter; or, The device sends the link parameters to the optoelectronic conversion module.

17. The method according to claim 15 or 16, characterized in that Before the device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, the method further includes: The device obtains a first coefficient set from the photoelectric conversion module, wherein the first coefficient set is used to obtain P tap coefficients; The device convolves the first coefficient set and the second coefficient set to obtain a third coefficient set, where the second coefficient set corresponds to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1.

18. The method according to claim 15 or 16, characterized in that Before the device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, the method further includes: The device sends a second coefficient set to the photoelectric conversion module, where the second coefficient set corresponds to the second compensation parameter, and the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1; The device obtains a third coefficient set from the optical-to-electrical conversion module, where the third coefficient set is used to obtain P tap coefficients.

19. The method according to claim 17 or 18, characterized in that The device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, comprising: The FFE of the device compensates the first electrical signal according to the third set of coefficients to obtain the second electrical signal.

20. The method according to claim 15 or 16, characterized in that The device compensates the first electrical signal according to the second compensation parameter to obtain a compensated second electrical signal, comprising: The device obtains a second compensation parameter, where the second compensation parameter is smaller than the link parameter; The device obtains a second coefficient set corresponding to the second compensation parameter, where the second coefficient set is used to obtain P tap coefficients, where P is any integer greater than 1; The FFE of the device compensates the first electrical signal according to the second set of coefficients to obtain the second electrical signal.

21. The method according to any one of claims 15 to 20, characterized in that Before the device sends the second electrical signal to the photoelectric conversion module, the method further includes: The device obtains a nonlinear parameter from the photoelectric conversion module, wherein the nonlinear parameter is related to a nonlinear characteristic of the transmission link; The device performs nonlinear compensation on the first electrical signal or the second electrical signal according to the nonlinear parameter.

22. A communication system, characterized in that: The communication system comprises an outer shell, the outer shell fixes a device and an optoelectronic conversion module, the device comprises a processing chip and a connector, the optoelectronic conversion module comprises a compensation module, an electro-optical conversion chip and an output optical fiber connected in sequence, the optoelectronic conversion module further comprises a control chip connected to the compensation module and the electro-optical conversion chip respectively, and the processing chip is connected to the compensation module via the connector; The processing chip or the control chip is used to assign a first compensation parameter to the compensation module, the first compensation parameter is less than a link parameter of a transmission link, and the link parameter is used to compensate for an electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; The processing chip is used to compensate the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, wherein the second compensation parameter is smaller than a link parameter of the transmission link; The processing chip is used to send the second electrical signal to the compensation module through the connector; The compensation module is used for compensating the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; The electro-optical conversion chip is used to perform electro-optical conversion on the third electrical signal to obtain an optical signal; The output optical fiber is used to emit the optical signal.

23. A photoelectric conversion module, characterized in that: The photoelectric conversion module includes a compensation module, an electro-optical conversion chip and an output optical fiber connected in sequence, the photoelectric conversion module also includes a control chip connected to the compensation module and the electro-optical conversion chip respectively, and the compensation module is connected to a connector of the device; The compensation module is used to receive a first compensation parameter from the device through the connector, or the control chip is used to assign the first compensation parameter to the compensation module, the first compensation parameter is less than a link parameter of a transmission link, the link parameter is used to compensate for an electrical signal transmitted by the transmission link, the transmission link includes a first transmission link and a second transmission link, the device further includes a processing chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; The compensation module is further used to receive a second electrical signal from the device through the connector, and compensate the second electrical signal according to the first compensation parameter to obtain a compensated third electrical signal; The electro-optical conversion chip is used to perform electro-optical conversion on the third electrical signal to obtain an optical signal; The output optical fiber is used to emit the optical signal.

24. A device, characterized in that The device comprises an outer shell, the outer shell fixes the device, the device comprises a processing chip and a connector, the processing chip is connected to the photoelectric conversion module through the connector; The processing chip is used to compensate the first electrical signal according to a second compensation parameter to obtain a compensated second electrical signal, wherein the second compensation parameter is less than a link parameter of a transmission link, and the link parameter is used to compensate the electrical signal transmitted by the transmission link, wherein the transmission link includes a A transmission link and a second transmission link, the photoelectric conversion module includes an electro-optical conversion chip, the first transmission link is from the connector to the electro-optical conversion chip, and the second transmission link is from the processing chip to the connector; The processing chip is further configured to send the second electrical signal to the photoelectric conversion module through the connector.

Images