Signal processing device, system and method, signal transmission subsystem, and system

Abstract

The present disclosure provides a signal processing device, a system and method, a signal transmission subsystem, and a system, which relate to the field of optical communication technology. The signal processing device includes a first opto-electrical conversion module and a second opto-electrical conversion module, the first opto-electrical conversion module is configured to receive an optical signal to be transmitted transmitted by a time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module, the second opto-electrical conversion module is configured to convert the electrical signal to be transmitted into a first optical signal of a preset frequency, and transmit the first optical signal to the first optical path coupling device, so that the first optical path coupling device couples the first optical signal to an optical signal transmission line for transmission. The present disclosure provides a processing scheme for a time synchronization signal, which improves the accuracy of the transmitted time synchronization signal.

Description

[Technical field]

[0001] (CROSS-CIRCUMSTANCES OF RELATED APPLICATIONS) This application is based on and claims priority to a Chinese patent application having Chinese application number 202210376953.2 and filed on April 11, 2022, the entire contents of which are incorporated herein by reference in their entirety.

[0002] The present disclosure relates to the field of optical communication technology, and in particular to a signal processing device, a signal processing system, a signal processing method, a signal transmission subsystem, and a signal transmission system. [Background technology]

[0003] In the field of mobile communications, communication devices / systems each have their own device / system time, and in order to ensure accurate transmission of signals, it is necessary to control the time deviation between communication devices / systems for transmitting signals within a certain range, so time synchronization between communication devices / systems is necessary.

[0004] In a related technology, time synchronization between communication devices / systems can be achieved by an OTN (optical transport network) / WDM (Wavelength Division Multiplex) system. Summary of the Invention

[0005] According to a first aspect of the present disclosure, there is provided a signal processing device, the signal processing device comprising a first opto-electrical conversion module and a second opto-electrical conversion module, the first opto-electrical conversion module is configured to receive an optical signal to be transmitted transmitted by a time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module, the optical signal to be transmitted being generated by the time synchronization device based on an initial electrical signal, the initial electrical signal including a traffic signal and a time synchronization signal, the second opto-electrical conversion module is configured to convert the electrical signal to be transmitted into a first optical signal of a predetermined frequency, and transmit the first optical signal to the first optical path coupling device, so that the first optical path coupling device couples and transmits the first optical signal to an optical signal transmission line.

[0006] In some embodiments, the second opto-electrical conversion module is further configured to receive a second optical signal of a predetermined frequency transmitted by a second optical path coupling device, convert the second optical signal into a second processed electrical signal, and transmit the second processed electrical signal to the first opto-electrical conversion module, the second optical signal being obtained from the optical signal transmission line by the second optical path coupling device, and the first opto-electrical conversion module is further configured to convert the second processed electrical signal into a second processed optical signal, and transmit the second processed optical signal to the time synchronization device.

[0007] In some embodiments, the first optical signal and the second optical signal are optical signals having different wavelengths.

[0008] In some embodiments, a wavelength difference value between the first optical signal and the second optical signal is less than or equal to a preset wavelength threshold value.

[0009] According to a second aspect of the present disclosure, there is provided a signal processing device, the signal processing device comprising a second opto-electrical conversion module and a first opto-electrical conversion module, the second opto-electrical conversion module is configured to receive a first optical signal of a predetermined frequency transmitted by a first optical path coupling device, convert the first optical signal into a first electrical signal to be processed, and transmit the first electrical signal to be processed to the first opto-electrical conversion module, the first optical signal being obtained by the first optical path coupling device from an optical signal transmission line, and the first opto-electrical conversion module is configured to convert the first electrical signal to be processed into a first optical signal to be processed, and transmit the first optical signal to be processed to the time synchronization device.

[0010] In some embodiments, the first opto-electrical conversion module is further configured to receive an optical signal to be transmitted transmitted by the time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to a second opto-electrical conversion module, and the second opto-electrical conversion module is further configured to convert the electrical signal to be transmitted into a second optical signal of a predetermined frequency and transmit the second optical signal to the second optical path coupling device, so that a second optical path coupling device couples and transmits the second optical signal to the optical signal transmission line.

[0011] In some embodiments, the first optical signal and the second optical signal are optical signals having different wavelengths.

[0012] In some embodiments, a wavelength difference value between the first optical signal and the second optical signal is less than or equal to a preset wavelength threshold value.

[0013] According to a third aspect of the present disclosure, there is provided a signal processing system, the signal processing system comprising: a time synchronization device; the signal processing device according to the first aspect; and a first optical path coupling device, the time synchronization device being configured to generate an optical signal to be transmitted based on an initial electrical signal and transmit the optical signal to be transmitted to the signal processing device, the initial electrical signal including a traffic signal and a time synchronization signal, the signal processing device being configured to convert the optical signal to be transmitted into a first optical signal having a predetermined frequency and transmit the first optical signal to the first optical path coupling device, and the first optical path coupling device being configured to couple the first optical signal to the optical signal transmission line for transmission.

[0014] According to a fourth aspect of the present disclosure, there is provided a signal processing system, the signal processing system comprising: a time synchronization device; the signal processing device according to the second aspect; and a first optical path coupling device; The first optical path coupling device is configured to receive a first optical signal from the optical signal transmission line and transmit the first optical signal to the signal processing device, the signal processing device is configured to convert the first optical signal into a first optical signal to be processed and transmit the first optical signal to be processed to the time synchronization device, and the time synchronization device is configured to convert the first optical signal to be processed into a first target electrical signal.

[0015] According to a fifth aspect of the present disclosure, there is provided a signal transmission subsystem comprising a first signal processing system, a second signal processing system, and an optical signal transmission line, the first signal processing system being the signal processing system described in the second aspect, or the second signal processing system being the signal processing system described in the third aspect, and the first signal processing system and the second signal processing system being connected via the optical signal transmission line.

[0016] According to a sixth aspect of the present disclosure, there is provided a signal transmission system comprising a first signal transmission subsystem, a second signal transmission subsystem, and a relay device, the first signal transmission subsystem and the second signal transmission subsystem being the signal transmission subsystem described in the fourth aspect, and in the first signal transmission subsystem, the first opto-electrical conversion module of a second signal processing system is connected to a first end of the relay device, and in the second signal transmission subsystem, the first opto-electrical conversion module of the first signal processing system is connected to a second end of the relay device.

[0017] According to a seventh aspect of the present disclosure, there is provided a signal processing method, the method including: receiving an optical signal to be transmitted transmitted by a time synchronization device, the optical signal to be transmitted being generated by the time synchronization device based on an initial electrical signal, the initial electrical signal including a traffic signal and a time synchronization signal; converting the optical signal to be transmitted into an electrical signal to be transmitted; converting the electrical signal to be transmitted into a first optical signal having a predetermined frequency; and transmitting the first optical signal to the first optical path coupling device such that the first optical path coupling device couples and transmits the first optical signal to an optical signal transmission line.

[0018] In some embodiments, the signal processing method further includes receiving a second optical signal of a predetermined frequency transmitted by a second optical path coupling device, the second optical signal being obtained from the optical signal transmission line by the second optical path coupling device; converting the second optical signal into a second electrical signal to be processed; converting the second electrical signal to be processed into a second optical signal to be processed; and transmitting the second optical signal to the time synchronization device.

[0019] In some embodiments, the first optical signal and the second optical signal are optical signals having different wavelengths.

[0020] In some embodiments, a wavelength difference value between the first optical signal and the second optical signal is less than or equal to a preset wavelength threshold value.

[0021] According to an eighth aspect of the present disclosure, there is provided a signal processing method, the signal processing method including: receiving a first optical signal of a preset frequency transmitted by a first optical path coupling device, where the first optical signal is obtained by the first optical path coupling device from an optical signal transmission line; converting the first optical signal into a first electrical signal to be processed; converting the first electrical signal to be processed into a first optical signal to be processed; and transmitting the first optical signal to be processed to a time synchronization device.

[0022] In some embodiments, the signal processing method further includes receiving an optical signal to be transmitted transmitted by the time synchronization device, converting the optical signal to be transmitted into an electrical signal to be transmitted, converting the electrical signal to be transmitted into a second optical signal having a predetermined frequency, and transmitting the second optical signal to the second optical path coupling device such that the second optical path coupling device couples and transmits the second optical signal to the optical signal transmission line.

[0023] In some embodiments, the first optical signal and the second optical signal are optical signals having different wavelengths.

[0024] In some embodiments, a wavelength difference value between the first optical signal and the second optical signal is less than or equal to a preset wavelength threshold value.

[0025] It should be noted that the above general description and detailed description are merely illustrative and are not intended to limit the present disclosure. [Brief description of the drawings]

[0026] The drawings herein are incorporated into the specification and constitute a part of this specification, conform to the embodiments of the present disclosure, and are used to interpret the principles of the present disclosure together with the specification. It is apparent that the drawings in the following description are merely some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings based on these drawings without creative efforts. [Figure 1]FIG. 1 is a schematic configuration diagram of a signal processing device according to an exemplary embodiment. [Diagram 2] FIG. 13 is a schematic configuration diagram of another signal processing device according to the exemplary embodiment. [Diagram 3] FIG. 1 is a schematic configuration diagram of a signal processing system according to an exemplary embodiment. [Figure 4] FIG. 13 is a schematic diagram of another signal processing system according to the exemplary embodiment. [Diagram 5] FIG. 13 is a schematic configuration diagram of yet another signal processing system according to the exemplary embodiment. [Figure 6] FIG. 13 is a schematic configuration diagram of yet another signal processing system according to the exemplary embodiment. [Figure 7] FIG. 2 is a schematic diagram of a signal transmission subsystem in the exemplary embodiment. [Figure 8] FIG. 1 is a schematic configuration diagram of a signal transmission system according to an exemplary embodiment. [Figure 9] 4 is a flowchart of a signal processing method in the exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments may be implemented in various forms and are not limited to the examples set forth herein. These embodiments are provided to make the present disclosure more complete and complete, and to comprehensively convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to fully understand the embodiments of the present disclosure. However, those skilled in the art may omit one or more of the specific details in practicing the technical solutions of the present disclosure, or may employ other methods, components, devices, steps, etc. In other cases, well-known technical solutions are not shown or described in detail to avoid obscuring aspects of the present disclosure.

[0028] It should be noted that the drawings are schematic diagrams of the present disclosure and are not necessarily drawn to scale. In the drawings, the same or corresponding parts are given the same reference numerals, and duplicated explanations are omitted. Some block diagrams shown in the drawings are functional entities that do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software form, in one or more hardware modules or integrated circuits, or in different networks and / or processor units and / or microcontroller devices.

[0029] The flowcharts shown in the drawings are merely exemplary and do not necessarily include all steps, for example, some steps may be decomposed, some steps may be integrated or partially integrated, and the order of actual execution may vary according to actual circumstances.

[0030] In the related art, a time synchronization scheme has emerged in which a time synchronization signal is transmitted between communication devices / systems by an OTN / WDM system. In this time synchronization scheme, the time synchronization signal is usually encapsulated in traffic data, and in the process of time synchronization between communication devices / systems, an optical monitoring device usually needs to extract the time synchronization signal from the traffic data, and then process the time synchronization signal into an optical signal, which is then coupled to an optical signal transmission line through a multiplexer for transmission.

[0031] Here, the process of extracting the time synchronization signal by the optical monitoring device takes a certain amount of time, and there is a deviation between the actual time of the time synchronization signal and the time of the extracted time synchronization signal, which affects the accuracy of the transmitted time synchronization signal. That is, the implementation process of the time synchronization scheme between communication devices provided in the related art is complicated, costly, and the accuracy of the synchronization result is poor.

[0032] In view of the above problems, an exemplary embodiment of the present disclosure provides a signal processing device, further improving the accuracy of a transmitted time synchronization signal. The signal processing device may be applied to a transmission scene of a time synchronization signal based on a wavelength division multiplexing system, and the signal processing device may include a first opto-electrical conversion module and a second opto-electrical conversion module, where the first opto-electrical conversion module is configured to receive an optical signal to be transmitted transmitted by a time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module, and the second opto-electrical conversion module is configured to convert the electrical signal to be transmitted into a first optical signal of a preset frequency, and transmit the first optical signal to the first optical path coupling device, so that the first optical path coupling device couples the first optical signal to an optical signal transmission line for transmission, where the optical signal to be transmitted is generated by the time synchronization device based on an initial electrical signal, and the initial electrical signal includes a traffic signal and a time synchronization signal. In the process of transmitting the time synchronization signal, the signal processing device does not need to extract the time synchronization signal from the traffic signal, and improves the accuracy of the transmitted time synchronization signal.

[0033] An embodiment of the present disclosure provides a signal processing device applicable to a time synchronization signal transmitting node. As shown in FIG. 1, the signal processing device 100 includes a first optical / electrical conversion module 101 and a second optical / electrical conversion module 102.

[0034] The first optical / electrical conversion module 101 is configured to receive an optical signal to be transmitted sent by a time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to a second optical / electrical conversion module, where the optical signal to be transmitted is generated by the time synchronization device based on an initial electrical signal, and the initial electrical signal includes a traffic signal and a time synchronization signal. For example, the first optical / electrical conversion module 101 is a first optical / electrical converter.

[0035] The second opto-electrical conversion module 102 is configured to convert the electrical signal to be transmitted into a first optical signal having a preset frequency and transmit the first optical signal to the first optical path coupling device so that the first optical path coupling device couples the first optical signal to the optical signal transmission line and transmits the first optical signal. For example, the second opto-electrical conversion module 102 is a second opto-electrical converter.

[0036] In short, in the signal processing device according to the embodiment of the present disclosure, the first opto-electrical conversion module can receive the optical signal to be transmitted transmitted by the time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module, and the second opto-electrical conversion module can convert the electrical signal to be transmitted into a first optical signal of a preset frequency, and transmit the first optical signal to the first optical path coupling device, so that the first optical path coupling device couples the first optical signal to the optical signal transmission line for transmission. In the time synchronization signal transmitting node, the optical signal to be transmitted including the time synchronization signal can be directly converted into an optical signal of a preset frequency and transmitted, so that there is no need to extract the time synchronization signal from the optical signal to be transmitted, and interference with the accuracy of the time synchronization signal due to processes such as extraction and processing of the time synchronization signal can be prevented, and the accuracy of the transmitted time synchronization signal can be improved.

[0037] In an optional embodiment, the signal processing device may include an optical monitoring board card, and the optical monitoring board card may include a first opto-electrical conversion module and a second opto-electrical conversion module, where the first opto-electrical conversion module and the second opto-electrical conversion module may be SFP modules (Small Form-factor Pluggable).

[0038] In addition, in the embodiment of the present disclosure, the time synchronization signal transmitting node needs to receive the time synchronization signal transmitted by the time synchronization signal receiving node, and the time synchronization signal transmitting node performs time correction on the time synchronization signal transmitting node based on the time synchronization signal of the time synchronization signal receiving node, thereby making the time of the time synchronization signal receiving node and the time synchronization signal transmitting node coincident. Here, in order to prevent the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node from interfering with each other on the optical signal transmission line, the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node have different wavelengths, so that the transmission stability and reliability of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node can be improved.

[0039] In an optional embodiment, in the time synchronization signal transmitting node, the first opto-electrical conversion module of the signal processing device is further configured to receive a second optical signal of a preset frequency transmitted by the second optical path coupling device, convert the second optical signal into a second electrical signal to be processed, and transmit the second electrical signal to be processed to the first opto-electrical conversion module, and the first opto-electrical conversion module is configured to convert the second electrical signal to be processed into a second optical signal to be processed, and transmit the second optical signal to be processed to the time synchronization device, where the second optical signal is obtained by the second optical path coupling device from the optical signal transmission line, and the second optical signal of the preset frequency can be transmitted by the time synchronization signal receiving node via the optical signal transmission line. At the time synchronization signal transmitting node, the second optical signal acquired from the optical signal transmission line can be directly converted into an electrical signal and an optical signal. In this process, there is no need to perform an extraction process on the time synchronization signal, so that the accuracy and efficiency of the acquired time synchronization signal can be improved. In addition, the wavelengths of the second optical signal in the optical signal transmission line and the first optical signal in the optical signal transmission line are different, so that there is no interference between them, and the transmission stability and reliability of the first optical signal and the second optical signal can be improved.

[0040] In an optional embodiment, in an optical signal transmission line, the transmission times of optical signals with different wavelengths are different, and in order to reduce the delay in the optical signal transmission line of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node, the consistency of the transmission delay of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node is improved. The first optical signal and the second optical signal are optical signals with different wavelengths, and the wavelength difference value of the first optical signal and the second optical signal is equal to or less than a preset wavelength threshold. Here, the preset wavelength threshold can be determined based on actual needs, and the embodiment of the present disclosure is not limited thereto. The delay in the optical signal transmission line of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node can be reduced, and the accuracy of the time synchronization signal acquired by the time synchronization signal transmitting node and the time synchronization signal receiving node can be further improved.

[0041] For example, the wavelength of the first optical signal may be 196.0 Thz, and the wavelength of the second optical signal may be 196.1 Thz, and the wavelength difference value between the first optical signal of 196.0 Thz and the second optical signal of 196.1 Thz is 0.1 Thz, so that the transmission delay of the first optical signal and the second optical signal in the optical signal transmission line can be further reduced, and the accuracy of the time synchronization signal obtained by the time synchronization signal transmitting node and the time synchronization signal receiving node from the opposite end can be further improved. It can be understood that the opposite end of the time synchronization signal transmitting node is the time synchronization signal receiving node, and the opposite end of the time synchronization signal receiving node is the time synchronization signal transmitting node.

[0042] An embodiment of the present disclosure provides a signal processing device applicable to a time synchronization signal receiving node. As shown in FIG. 2, the signal processing device 100 includes a second opto-electrical conversion module 102 and a first opto-electrical conversion module 101.

[0043] The second opto-electrical conversion module 102 is configured to receive a first optical signal of a preset frequency transmitted by the first optical path coupling device, convert the first optical signal into a first electrical signal to be processed, and transmit the first electrical signal to be processed to the first opto-electrical conversion module, where the first optical signal is obtained by the first optical path coupling device from an optical signal transmission line, and the first optical signal of the preset frequency can be transmitted by a time synchronization signal transmitting node via the optical signal transmission line. For example, the second opto-electrical conversion module 102 is a second opto-electrical converter.

[0044] The first opto-electrical conversion module 101 is configured to convert the first electrical signal to be processed into a first optical signal to be processed, and transmit the first optical signal to be processed to the time synchronization device. For example, the first opto-electrical conversion module 101 is a first opto-electrical converter.

[0045] In short, in a signal processing device according to an embodiment of the present disclosure, the second opto-electrical conversion module can receive a first optical signal of a predetermined frequency transmitted by the first optical path coupling device, convert the first optical signal into a first electrical signal to be processed, and transmit the first electrical signal to be processed to the first opto-electrical conversion module, the first opto-electrical conversion module can convert the first electrical signal to be processed into a first optical signal to be processed, and transmit the first optical signal to be processed to the time synchronization device, and at the time synchronization signal receiving node, the first optical signal acquired from the optical signal transmission line can be directly converted into an electrical signal and an optical signal, and in this process, there is no need to perform extraction processing on the time synchronization signal, and the accuracy and efficiency of the acquired time synchronization signal can be improved.

[0046] In the embodiment of the present disclosure, the time synchronization signal receiving node needs to perform time correction on the time synchronization signal receiving node based on the time synchronization signal of the time synchronization signal transmitting node so that the time of the time synchronization signal receiving node and the time of the time synchronization signal transmitting node coincide with each other. Here, in order to prevent the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node from interfering with each other on the optical signal transmission line, the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node have different wavelengths, thereby improving the transmission stability and reliability of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node.

[0047] In an optional embodiment, in the time synchronization signal receiving node, the first opto-electrical conversion module of the signal processing device is further configured to receive the optical signal to be transmitted transmitted by the time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module, and the second opto-electrical conversion module is further configured to convert the electrical signal to be transmitted into a second optical signal of a preset frequency, and transmit the second optical signal to the second optical path coupling device, so that the second optical path coupling device couples the second optical signal to the optical signal transmission line for transmission. In the time synchronization signal receiving node, the optical signal to be transmitted including the time synchronization signal can be directly converted into the second optical signal of the preset frequency and transmitted, so that there is no need to extract the time synchronization signal from the optical signal to be transmitted, and the accuracy of the transmitted time synchronization signal can be improved, and in the time synchronization signal receiving node, the second optical signal coupled to the optical signal transmission line and the first optical signal coupled to the optical signal transmission line have different wavelengths, so that there is no interference between them, and the transmission stability and reliability of the first optical signal and the second optical signal can be improved.

[0048] In an optional embodiment, in an optical signal transmission line, the transmission times of optical signals with different wavelengths are different, and in order to reduce the delay in the optical signal transmission line of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node, the consistency of the transmission delay of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node is improved. The first optical signal and the second optical signal are optical signals with different wavelengths, and the wavelength difference value between the first optical signal and the second optical signal is equal to or less than a preset wavelength threshold. Here, the preset wavelength threshold can be determined based on actual needs, and the embodiment of the present disclosure is not limited thereto. The delay in the optical signal transmission line of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node can be reduced, and the accuracy of the time synchronization signal acquired by the time synchronization signal transmitting node and the time synchronization signal receiving node can be further improved.

[0049] For example, the wavelength of the first optical signal may be 196.0 Thz, and the wavelength of the second optical signal may be 196.1 Thz, and the wavelength difference value between the first optical signal of 196.0 Thz and the second optical signal of 196.1 Thz is 0.1 Thz, so that the transmission delay of the first optical signal and the second optical signal in the optical signal transmission line can be further reduced, and the accuracy of the time synchronization signal obtained by the time synchronization signal transmitting node and the time synchronization signal receiving node from the opposite end can be further improved. It can be understood that the opposite end of the time synchronization signal transmitting node is the time synchronization signal receiving node, and the opposite end of the time synchronization signal receiving node is the time synchronization signal transmitting node.

[0050] An embodiment of the present disclosure provides a signal processing system 10 applicable to a time synchronization signal transmitting node, and as shown in FIG. 3, the signal processing system 10 includes a time synchronization device 200, the signal processing device 100 in the above embodiment, and a first optical path coupling device 300.

[0051] The time synchronizer 200 is configured to generate an optical signal to be transmitted based on the initial electrical signal, and transmit the optical signal to be transmitted to the signal processing device 100, where the initial electrical signal includes a traffic signal and a time synchronization signal.

[0052] The signal processing device 100 is configured to convert an optical signal to be transmitted into a first optical signal having a preset frequency, and transmit the first optical signal to a first optical path coupling device 300 .

[0053] Here, the process in which the signal processing device converts the optical signal to be transmitted into the first optical signal having a preset frequency can be referred to the above embodiment, and the present disclosure will not describe it.

[0054] The first optical path coupling device 300 is configured to couple and transmit a first optical signal to an optical signal transmission line.

[0055] In short, in the signal processing system according to the embodiment of the present disclosure, the time synchronization device can generate an optical signal to be transmitted based on an initial electrical signal and transmit the optical signal to be transmitted to the signal processing device, the signal processing device can convert the optical signal to be transmitted into a first optical signal having a preset frequency and transmit the first optical signal to the first optical path coupling device, and the first optical path coupling device is configured to couple the first optical signal to an optical signal transmission line for transmission. In the time synchronization signal transmitting node, the signal processing system can be used to directly convert the optical signal to be transmitted including the time synchronization signal into the first optical signal for transmission, eliminating the need to extract the time synchronization signal from the optical signal to be transmitted, and improving the accuracy of the transmitted time synchronization signal.

[0056] In an alternative embodiment, the time synchronization device may include a synchronous GE (Gigabit Ethernet) interface, a time synchronization signal interface, the synchronous GE interface is configured to acquire a traffic signal, the time synchronization signal interface may acquire the time synchronization signal sent by the clock device, package the traffic signal and the time synchronization signal into an initial electrical signal, and convert the initial electrical signal into an optical signal to be transmitted, where the wavelength of the optical signal to be transmitted may be determined based on actual needs, and the embodiment of the present disclosure is not limited thereto. Illustratively, the wavelength of the optical signal to be transmitted may be 1310 nm (nanometers).

[0057] In the embodiment of the present disclosure, the devices in the signal processing system are connected to each other by an interface in each device and an optical signal transmission line between the interfaces. For example, as shown in Fig. 3, the time synchronization device 200 is connected to the second interface 103 in the signal processing device 100 via the first interface 201 therein, and the signal processing device 100 is connected to the fourth interface 301 in the first optical path coupling device 300 via the third interface 104 therein.

[0058] In an optional embodiment, the time synchronization device 200 transmits the optical signal to be transmitted to the second interface 103 of the signal processing device 100 via the first interface 201, the signal processing device 100 acquires the optical signal to be transmitted via the second interface 103, converts the optical signal to be transmitted into a first optical signal of a preset frequency, and transmits the first optical signal to the fourth interface 301 of the first optical path coupling device via the third interface 104, and the first optical path coupling device 300 acquires the first optical signal via the fourth interface 301 and couples the first optical signal to an optical signal transmission line for transmission.

[0059] In an optional embodiment, when the time synchronization signal transmitting node needs to receive a time synchronization signal transmitted by the time synchronization signal receiving node to perform time synchronization, as shown in FIG. 4, the signal processing system 10 further includes a second optical path coupling device 400.

[0060] The second optical path coupling device 400 is configured to obtain a second optical signal from the optical signal transmission line and transmit the second optical signal to the signal processing device 100, where the second optical signal is transmitted by a time synchronization signal receiving node, and the second optical signal is determined by the time synchronization signal transmitting node based on an initial electrical signal, and the initial electrical signal includes a traffic signal and a time synchronization signal.

[0061] The signal processing device 100 is configured to convert the second optical signal into a second processed optical signal and transmit the second processed optical signal to the time synchronizer 200 .

[0062] Here, the process in which the signal processing device converts the second optical signal into the second optical signal to be processed can be referred to in the above embodiments, and the present disclosure will not describe it.

[0063] The time synchronizer 200 is configured to convert the second optical signal to be processed into a second target electrical signal.

[0064] Here, since the second target electrical signal includes the time synchronization signal of the time synchronization signal receiving node, the time synchronization signal transmitting node corrects the time of the time synchronization signal transmitting node based on the time synchronization signal transmitted by the time synchronization signal receiving node, to ensure that the time of the time synchronization signal transmitting node and the time of the time synchronization signal receiving node are consistent, and at the time synchronization signal transmitting node, the signal processing system can be used to directly obtain a second optical signal including the time synchronization signal from the optical signal transmission line and convert the second optical signal into a second target optical signal, so that there is no need to extract the time synchronization signal from the second optical signal, and the accuracy of the obtained time synchronization signal can be improved.

[0065] In addition, in the embodiment of the present disclosure, the devices in the signal processing system are connected by interfaces in each device and optical signal transmission lines between the interfaces, and as shown in FIG. 4, the time synchronization device 200 is connected to the sixth interface 105 in the signal processing device 100 via its fifth interface 202, and the signal processing device 100 is connected to the eighth interface 401 in the second optical path coupling device 400 via its seventh interface 106.

[0066] In an optional embodiment, the second optical path coupling device 400 may transmit the second optical signal to the seventh interface 106 of the signal processing device 100 via the eighth interface 401, the signal processing device 100 may receive the second optical signal via the seventh interface 106, convert the second optical signal into a second optical signal to be processed, and transmit the second optical signal to be processed to the fifth interface 202 of the time synchronization device 200 via the sixth interface 105, and the time synchronization device 200 may receive the second optical signal to be processed via the fifth interface 202 and convert the second optical signal to be processed into a second target electrical signal.

[0067] An embodiment of the present disclosure provides a signal processing system 10 applicable to a time synchronization signal receiving node, and as shown in FIG. 5 , the signal processing system 10 includes a time synchronization device 200, the signal processing device 100 in the above embodiment, and a first optical path coupling device 300.

[0068] The first optical path coupling device 300 is configured to receive a first optical signal from an optical signal transmission line, and transmit the first optical signal to the signal processing device 100 .

[0069] Here, the first optical signal is an optical signal transmitted by a time synchronization signal transmitting node, and the first optical signal is determined by the time synchronization signal transmitting node based on an initial electrical signal, and the initial electrical signal includes a traffic signal and a time synchronization signal.

[0070] The signal processing device 100 is configured to convert a first optical signal into a first processed optical signal and transmit the first processed optical signal to the time synchronizer 200 .

[0071] Here, the process in which the signal processing device converts the first optical signal into the first optical signal to be processed can be referred to in the above embodiments, and the present disclosure will not describe it.

[0072] The time synchronizer 200 is configured to convert a first optical signal to be processed into a first electrical target signal.

[0073] Here, since the first target electrical signal includes the time synchronization signal of the time synchronization signal transmitting node, the time synchronization signal receiving node can correct the time of the time synchronization signal receiving node based on the time synchronization signal transmitted by the time synchronization signal transmitting node so as to ensure consistency between the time of the time synchronization signal transmitting node and the time of the time synchronization signal receiving node.

[0074] In short, in the signal processing system according to the embodiment of the present disclosure, the first optical path coupling device can acquire a first optical signal from an optical signal transmission line and transmit the first optical signal to a signal processing device, the signal processing device can convert the first optical signal into a first optical signal to be processed and transmit the first optical signal to be processed to a time synchronization device, and the time synchronization device can convert the first optical signal to be processed into a first target electrical signal. At the time synchronization signal receiving node, the signal processing system can be used to directly acquire the first optical signal including the time synchronization signal from the optical signal transmission line and convert the first optical signal into a first target optical signal, eliminating the need to extract the time synchronization signal from the first optical signal and improving the accuracy of the acquired time synchronization signal.

[0075] In addition, in an embodiment of the present disclosure, devices in the signal processing system are connected by interfaces in each device and optical signal transmission lines between the interfaces, and as shown in FIG. 5, the time synchronization device 200 is connected to the second interface 103 in the signal processing device 100 via its first interface 201, and the signal processing device 100 is connected to the fourth interface 301 in the first optical path coupling device 300 via its third interface 104.

[0076] In an optional embodiment, the first optical path coupling device 300 acquires a first optical signal from the optical signal transmission line, and then transmits the first optical signal to the third interface 104 of the signal processing device 100 via the fourth interface 301, the signal processing device 100 acquires the first optical signal via the third interface 104, converts the first optical signal into a first optical signal to be processed, and transmits the first optical signal to be processed to the first interface 201 of the time synchronization device 200 via the second interface 103, and the time synchronization device 200 acquires the first optical signal to be processed via the first interface 201 and converts the first optical signal to be processed into a first target electrical signal.

[0077] In an optional embodiment, the time synchronization signal receiving node also needs to transmit a time synchronization signal to the time synchronization signal transmitting node to perform time synchronization, and as shown in FIG. 6, the signal processing system 10 further includes a second optical path coupling device 400.

[0078] The time synchronizer 200 is configured to generate an optical signal to be transmitted based on the initial electrical signal, and transmit the optical signal to be transmitted to the signal processing device 100, where the initial electrical signal includes a traffic signal and a time synchronization signal.

[0079] The signal processing device 100 is configured to convert the optical signal to be transmitted into a second optical signal having a preset frequency, and transmit the second optical signal to the second optical path coupling device 400 .

[0080] Here, the process in which the signal processing device converts the optical signal to be transmitted into the second optical signal having a preset frequency can be referred to the above embodiment, and the present disclosure will not describe it.

[0081] The second optical path coupling device 400 is configured to couple the second optical signal to the optical signal transmission line for transmission. At the time synchronization signal receiving node, the signal processing system can be used to directly convert the optical signal to be transmitted, which includes the time synchronization signal, into the second optical signal for transmission, eliminating the need to extract the time synchronization signal from the optical signal to be transmitted, and improving the accuracy of the transmitted time synchronization signal.

[0082] In addition, in the embodiment of the present disclosure, the devices in the signal processing system are connected by interfaces in each device and optical signal transmission lines between the interfaces, and as shown in FIG. 6, the time synchronization device 200 is connected to the sixth interface 105 in the signal processing device 100 via its fifth interface 202, and the signal processing device 100 is connected to the eighth interface 401 in the second optical path coupling device 400 via its seventh interface 106.

[0083] In an optional embodiment, the time synchronization device 200 generates an optical signal to be transmitted based on an initial electrical signal, and then transmits the optical signal to be transmitted to the sixth interface 105 of the signal processing device 100 via the fifth interface 202, the signal processing device 100 acquires the optical signal to be transmitted via the sixth interface 105, converts the optical signal to be transmitted into a second optical signal having a predetermined frequency, and transmits the second optical signal to the eighth interface 401 of the second optical path coupling device 400 via the seventh interface 106, and the second optical path coupling device 400 acquires the second optical signal via the eighth interface 401 and couples the second optical signal to the optical signal transmission line for transmission.

[0084] An embodiment of the present disclosure provides a signal transmission subsystem, the signal transmission subsystem including a first signal processing system, a second signal processing system, and an optical signal transmission line, the first signal processing system being a signal processing system applied to a time synchronization signal transmitting node in the above embodiment, or the second signal processing system being a signal processing system applied to a time synchronization signal receiving node in the above embodiment, where the first signal processing system and the second signal processing system are connected by an optical signal transmission line, the first signal processing system being applied to the time synchronization signal transmitting node, and the second signal processing system being applied to the time synchronization signal receiving node, and the optical signal transmission line may be an optical fiber or an optical cable, etc.

[0085] In an optional embodiment, as shown in FIG. 7, FIG. 7 shows a structural schematic diagram of a signal transmission subsystem, where the signal transmission subsystem 60 includes a first signal processing system 61, a second signal processing system 62 and an optical signal transmission line 63, where the first signal processing system is a signal processing system applied to the time synchronization signal transmitting node in the above embodiment, and the second signal processing system is a signal processing system applied to the time synchronization signal receiving node in the above embodiment, where the first signal processing system 61 and the second signal processing system 62 are connected by the optical signal transmission line 63, where the first signal processing system is applied to the time synchronization signal transmitting node, and the second signal processing system 62 is applied to the time synchronization signal receiving node, and the optical signal transmission line may be an optical fiber or an optical cable, etc.

[0086] In an optional embodiment, the first signal processing system 61 is configured to determine a first optical signal based on the initial electrical signal and couple the first optical signal to the optical signal transmission line 63 so that the optical signal transmission line 63 transmits the first optical signal to the second signal processing system 62.

[0087] The second signal processing system 62 acquires a first optical signal from the optical signal transmission line 63, and determines a first target electrical signal based on the first optical signal, thereby synchronizing the time of the time synchronization signal receiving node and the time of the time synchronization signal transmitting node using the time synchronization signal in the first target electrical signal.

[0088] Here, the process in which the first signal processing system determines the first optical signal based on the initial electrical signal may refer to the above embodiment, and the present disclosure does not describe it.The process in which the second signal processing system determines the first target electrical signal based on the first optical signal may refer to the above embodiment, and the present disclosure does not describe it.

[0089] In an optional embodiment, the second signal processing system 62 is configured to determine a second optical signal based on the initial electrical signal and couple the second optical signal to the optical signal transmission line 63 so that the optical signal transmission line 63 transmits the second optical signal to the first signal processing system 61.

[0090] The first signal processing system 61 is configured to receive a second optical signal from the optical signal transmission line 63, determine a second target electrical signal based on the second optical signal, and thereby synchronize the time of the time synchronization signal transmitting node and the time of the time synchronization signal receiving node using the second target electrical signal.

[0091] Here, the process in which the second signal processing system determines the second optical signal based on the initial electrical signal may refer to the above embodiment, and the present disclosure does not describe it.The process in which the first signal processing system determines the second target electrical signal based on the second optical signal may refer to the above embodiment, and the present disclosure does not describe it.

[0092] In an optional embodiment, the first optical signal and the second optical signal are optical signals having different wavelengths, and a wavelength difference value between the first optical signal and the second optical signal is equal to or less than a preset wavelength threshold value.

[0093] In summary, in the signal transmission subsystem according to the embodiment of the present disclosure, in a time synchronization signal transmitting node, a first signal processing system can directly convert an initial electrical signal including a time synchronization signal into an optical signal for transmission, eliminating the need to extract the time synchronization signal from the initial electrical signal, and improving the accuracy of the transmitted time synchronization signal. In a time synchronization signal receiving node, a second signal processing system can directly obtain an optical signal including a time synchronization signal from an optical signal transmission line, and convert the optical signal into a target optical signal, eliminating the need to extract the time synchronization signal from the optical signal, and improving the accuracy of the obtained time synchronization signal.

[0094] Furthermore, when the time synchronization signal transmitting node and the time synchronization signal receiving node respectively transmit optical signals to the opposite ends, the first optical signal transmitted by the first signal processing system and the second optical signal transmitted by the second signal processing system have different wavelengths, which can prevent interference between the optical signals and ensure safe transmission of the optical signals.

[0095] Furthermore, when the wavelength difference value between the first optical signal and the second optical signal is less than or equal to a predetermined wavelength threshold, the delay in the optical signal transmission line of the optical signal transmitted by the time synchronization signal transmitting node and the optical signal transmitted by the time synchronization signal receiving node can be reduced, and the accuracy of the time synchronization signal acquired by the time synchronization signal transmitting node and the time synchronization signal receiving node corresponding to the signal transmission subsystem can be further improved.

[0096] An embodiment of the present disclosure provides a signal transmission system 70 applicable to long-distance transmission scenes of optical signals. As shown in FIG. 8, the signal transmission system 70 includes a first signal transmission subsystem 71, a second signal transmission subsystem 72, and a repeater device 73, and the first signal transmission subsystem 71 and the second signal transmission subsystem 72 are the signal transmission subsystems in the above embodiment.

[0097] In the first signal transmission subsystem 71, the first photoelectric conversion module 101 of the second signal processing system 62 is connected to a first end of the relay device 73, and in the second signal transmission subsystem 72, the first photoelectric conversion module of the first signal processing system 61 is connected to a second end of the relay device 73.

[0098] In addition, in a long-distance transmission scene of an optical signal, multiple signal transmission subsystems may be included, and the embodiments of the present disclosure are not limited thereto, where two adjacent signal transmission subsystems are connected via a relay device to realize the target of long-distance transmission of an optical signal.

[0099] In the embodiment of the present disclosure, a signal transmission system including one first signal transmission subsystem, one second signal transmission subsystem, and one repeater device in a long-distance transmission scene of an optical signal is taken as an example to describe the signal transmission system.

[0100] In an optional embodiment, in the second signal processing system 62 of the first signal transmission subsystem 71, the first optical path coupling device can acquire the first optical signal transmitted by the first signal processing system 61 via the optical signal transmission line 63, and process the first optical signal as a first optical signal to be processed by the second opto-electrical conversion module, and then transmit the first optical signal to be processed to the first opto-electrical conversion module, which converts the first electrical signal to be processed into a first optical signal to be processed, and then transmit the first optical signal to be processed directly to the repeater device 73.

[0101] The repeater device 73 can amplify and regenerate the first optical signal to be processed, acquire the regenerated first optical signal to be processed, and transmit the regenerated first optical signal to be processed to a first opto-electrical conversion module in the first signal processing system 61 of the second signal transmission subsystem 72.

[0102] In the first signal processing system 61 of the second signal transmission subsystem 72, the first opto-electrical conversion module determines the regenerated first optical signal to be processed as an optical signal to be transmitted, converts the optical signal to be transmitted into an electrical signal to be transmitted, and then transmits the electrical signal to be transmitted to the second opto-electrical conversion module, which converts the electrical signal to be transmitted into a first optical signal of a predetermined frequency and transmits the first optical signal to a first optical path coupling device, so that the first optical path coupling device couples the first optical signal to the optical signal transmission line 63, and transmits the first optical signal to the second signal processing system 62 of the second signal transmission subsystem 72.

[0103] In an optional embodiment, in the first signal processing system 61 of the second signal transmission subsystem 72, the second optical path coupling device can acquire the second optical signal transmitted by the second signal processing system 62 via the optical signal transmission line 63, and process the second optical signal as a second optical signal to be processed by the second opto-electrical conversion module, and then transmit the second optical signal to be processed to the first opto-electrical conversion module, and after the first opto-electrical conversion module 101 converts the second electrical signal to be processed into a second optical signal to be processed, the second optical signal to be processed can be directly transmitted to the repeater device 73.

[0104] The repeater device 73 can amplify and regenerate the second optical signal to be processed, obtain the regenerated second optical signal to be processed, and transmit the regenerated second optical signal to be processed to the first opto-electrical conversion module in the second signal processing system 62 of the first signal transmission subsystem 71.

[0105] In the second signal processing system 62 of the second signal transmission subsystem 71, the first opto-electrical conversion module determines the regenerated second optical signal to be processed as an optical signal to be transmitted, converts the optical signal to be transmitted into an electrical signal to be transmitted, and then transmits the electrical signal to be transmitted to the second opto-electrical conversion module, which converts the electrical signal to be transmitted into a second optical signal of a predetermined frequency and transmits the second optical signal to the second optical path coupling device, so that the second optical path coupling device couples the second optical signal to the optical signal transmission line 63, and transmits the second optical signal to the first signal processing system 61 of the first signal transmission subsystem 71.

[0106] In short, in a signal transmission system according to an embodiment of the present disclosure, in a long-distance optical signal transmission scene, the second signal processing system in the first signal transmission subsystem can directly acquire an optical signal including a time synchronization signal from the optical signal transmission line, and convert the optical signal into an optical signal to be processed, eliminating the need to extract the time synchronization signal from the optical signal, preventing interference with the accuracy of the time synchronization signal due to processes such as extraction and processing of the time synchronization signal, and improving the accuracy of the transmitted time synchronization signal.

[0107] Furthermore, the optical signal to be processed is regenerated by a repeater device to obtain the regenerated optical signal to be processed, and the regenerated optical signal to be processed is directly transmitted to a first opto-electrical conversion module in a first signal processing system of the second signal transmission subsystem, so that the first opto-electrical conversion module determines the regenerated optical signal to be processed as the optical signal to be transmitted and transmits it, where the optical signal does not need to be processed by a time synchronization device, and the accuracy of the transmitted time synchronization signal can be further improved.

[0108] An embodiment of the present disclosure provides a signal processing method, which can be applied to the above-mentioned signal processing device, and the signal processing device can be a signal processing device of a time synchronization signal transmitting node. As shown in FIG. 9, the method includes steps S901 to S904.

[0109] In step S901, an optical signal to be transmitted that is transmitted by a time synchronization device is received.

[0110] Here, the optical signal to be transmitted is generated by a time synchronizer based on an initial electrical signal, where the initial electrical signal includes a traffic signal and a time synchronization signal.

[0111] In step S902, the optical signal to be transmitted is converted into an electrical signal to be transmitted.

[0112] In this step S901, the first opto-electrical conversion module of the signal processing device can convert an optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module.

[0113] In step S903, the electrical signal to be transmitted is converted into a first optical signal having a preset frequency.

[0114] In this step S901, the second optical / electrical conversion module of the signal processing device can convert the electrical signal to be transmitted into a first optical signal having a preset frequency.

[0115] In step S904, a first optical signal is transmitted to a first optical path coupling device, so that the first optical path coupling device couples the first optical signal to an optical signal transmission line for transmission.

[0116] In short, the signal processing method according to the embodiment of the present disclosure receives an optical signal to be transmitted transmitted by a time synchronization device, converts the optical signal to be transmitted into an electrical signal to be transmitted, and then converts the electrical signal to be transmitted into a first optical signal of a predetermined frequency for transmission. This eliminates the need to extract a time synchronization signal from the optical signal to be transmitted, prevents interference with the accuracy of the time synchronization signal due to processes such as extraction and processing of the time synchronization signal, and improves the accuracy of the transmitted time synchronization signal.

[0117] In some embodiments, the signal processing method further includes receiving a second optical signal of a predetermined frequency transmitted by a second optical path coupling device, the second optical signal being obtained from the optical signal transmission line by the second optical path coupling device, converting the second optical signal into a second electrical signal to be processed, converting the second electrical signal to be processed into a second optical signal to be processed, and transmitting the second optical signal to be processed to the time synchronization device.

[0118] In some embodiments, the first optical signal and the second optical signal are optical signals having different wavelengths.

[0119] In some embodiments, a wavelength difference value between the first optical signal and the second optical signal is less than or equal to a preset wavelength threshold value.

[0120] In an optional embodiment, the signal processing device may be a signal processing device of a time synchronization signal receiving node, and the signal processing method includes the following steps: receiving a first optical signal transmitted by a first optical path coupling device, transmitting the first optical signal to a second optical-electrical conversion module, the second optical-electrical conversion module converting the first optical signal into a first electrical signal to be processed, and transmitting the first electrical signal to be processed to the first optical-electrical conversion module, the first optical-electrical conversion module converting the first electrical signal to be processed into a first optical signal to be processed, and transmitting the first optical signal to be processed to the time synchronization device, where the first optical signal is obtained from the optical signal transmission line by the first optical path coupling device.

[0121] In some other embodiments of the present disclosure, a signal processing method is provided, the signal processing method including: receiving a first optical signal having a preset frequency transmitted by a first optical path coupling device, the first optical signal being obtained by the first optical path coupling device from an optical signal transmission line, converting the first optical signal into a first electrical signal to be processed, converting the first electrical signal to be processed into a first optical signal to be processed, and transmitting the first optical signal to be processed to a time synchronization device.

[0122] In some embodiments, the signal processing method further includes receiving an optical signal to be transmitted transmitted by the time synchronization device, converting the optical signal to be transmitted into an electrical signal to be transmitted, converting the electrical signal to be transmitted into a second optical signal having a predetermined frequency, and transmitting the second optical signal to the second optical path coupling device such that the second optical path coupling device couples and transmits the second optical signal to the optical signal transmission line.

[0123] In some embodiments, the first optical signal and the second optical signal are optical signals having different wavelengths.

[0124] In some embodiments, a wavelength difference value between the first optical signal and the second optical signal is less than or equal to a preset wavelength threshold value.

[0125] The present disclosure is not limited to the configurations described above and shown in the drawings, and various modifications are possible without departing from the spirit and scope of the present disclosure. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A signal processing device including a first photoelectric conversion module and a second photoelectric conversion module, the first opto-electrical conversion module is configured to receive an optical signal to be transmitted transmitted by a time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to the second opto-electrical conversion module, the optical signal to be transmitted is generated by the time synchronization device based on an initial electrical signal, and the initial electrical signal includes a traffic signal and a time synchronization signal, so that the signal processing device does not need to extract the time synchronization signal from the traffic signal in the process of transmitting the time synchronization signal; the second optoelectronic conversion module is configured to convert the target electrical signal into a first optical signal having a preset frequency, and transmit the first optical signal to the first optical path coupling device, so that the first optical path coupling device couples the first optical signal to an optical signal transmission line and transmits the first optical signal; 23. A signal processing device comprising:

2. The second opto-electrical conversion module is further configured to receive a second optical signal having a preset frequency transmitted by a second optical path coupling device, convert the second optical signal into a second electrical signal to be processed, and transmit the second electrical signal to the first opto-electrical conversion module, wherein the second optical signal is obtained by the second optical path coupling device from the optical signal transmission line; the first opto-electrical conversion module is further configured to convert the second processed electrical signal into a second processed optical signal and transmit the second processed optical signal to the time synchronization device; 2. The signal processing device according to claim 1 .

3. a wavelength difference value between the first optical signal and the second optical signal is equal to or smaller than a preset wavelength threshold value; 3. The signal processing device according to claim 2.

4. A signal processing device including a second photoelectric conversion module and a first photoelectric conversion module, The second photoelectric conversion module is configured to receive a first optical signal having a preset frequency transmitted by a first optical path coupling device, convert the first optical signal into a first electrical signal to be processed, and transmit the first electrical signal to be processed to the first photoelectric conversion module, the first optical signal being obtained by the first optical path coupling device from an optical signal transmission line; the first opto-electrical conversion module is configured to convert the first processed electrical signal into a first processed optical signal and transmit the first processed optical signal to a time synchronization device; the first opto-electrical conversion module is further configured to receive an optical signal to be transmitted by the time synchronization device, convert the optical signal to be transmitted into an electrical signal to be transmitted, and transmit the electrical signal to be transmitted to a second opto-electrical conversion module; the second opto-electrical conversion module is further configured to convert the target electrical signal into a second optical signal having a preset frequency, and transmit the second optical signal to the second optical path coupling device, so that the second optical path coupling device couples the second optical signal to the optical signal transmission line and transmits the second optical signal; A wavelength difference value between the first optical signal and the second optical signal is equal to or smaller than a preset wavelength threshold value.

23. A signal processing device comprising:

5. A signal processing system comprising a time synchronization device, the signal processing device according to claim 1, and a first optical path coupling device, the time synchronizer is configured to generate an optical signal to be transmitted based on an initial electrical signal, and transmit the optical signal to be transmitted to the signal processor, the initial electrical signal including a traffic signal and a time synchronization signal; the signal processing device is configured to convert an optical signal to be transmitted into a first optical signal having a preset frequency, and transmit the first optical signal to the first optical path coupling device; The first optical path coupling device is configured to couple the first optical signal to an optical signal transmission line and transmit the first optical signal.

1. A signal processing system comprising:

6. A signal processing system comprising a time synchronization device, the signal processing device according to claim 2, and a first optical path coupling device, the time synchronizer is configured to generate an optical signal to be transmitted based on an initial electrical signal, and transmit the optical signal to be transmitted to the signal processor, the initial electrical signal including a traffic signal and a time synchronization signal; the signal processing device is configured to convert an optical signal to be transmitted into a first optical signal having a preset frequency, and transmit the first optical signal to the first optical path coupling device; The first optical path coupling device is configured to couple the first optical signal to an optical signal transmission line and transmit the first optical signal.

1. A signal processing system comprising:

7. A signal processing system comprising a time synchronization device, the signal processing device according to claim 3, and a first optical path coupling device, the time synchronizer is configured to generate an optical signal to be transmitted based on an initial electrical signal, and transmit the optical signal to be transmitted to the signal processor, the initial electrical signal including a traffic signal and a time synchronization signal; the signal processing device is configured to convert an optical signal to be transmitted into a first optical signal having a preset frequency, and transmit the first optical signal to the first optical path coupling device; The first optical path coupling device is configured to couple the first optical signal to an optical signal transmission line and transmit the first optical signal.

1. A signal processing system comprising:

8. A signal processing system comprising a time synchronization device, the signal processing device according to claim 4, and a first optical path coupling device, the first optical path coupling device is configured to receive a first optical signal from the optical signal transmission line and transmit the first optical signal to the signal processing device; the signal processing device is configured to convert the first optical signal into a first processed optical signal and transmit the first processed optical signal to the time synchronization device; the time synchronisation device is configured to convert the first optical signal to be processed into a first target electrical signal; 1. A signal processing system comprising:

9. A signal transmission subsystem including a first signal processing system, a second signal processing system, and an optical signal transmission line, The first signal processing system is a signal processing system according to claim 5 , The second signal processing system is a signal processing system according to claim 8 , the first signal processing system and the second signal processing system are connected via the optical signal transmission line.

1. A signal transmission subsystem comprising:

10. A signal transmission subsystem including a first signal processing system, a second signal processing system, and an optical signal transmission line, The first signal processing system is a signal processing system according to claim 6 , The second signal processing system is a signal processing system according to claim 8 , the first signal processing system and the second signal processing system are connected via the optical signal transmission line.

1. A signal transmission subsystem comprising:

11. A signal transmission subsystem including a first signal processing system, a second signal processing system, and an optical signal transmission line, The first signal processing system is a signal processing system according to claim 7 , The second signal processing system is a signal processing system according to claim 8 , the first signal processing system and the second signal processing system are connected via the optical signal transmission line.

1. A signal transmission subsystem comprising:

12. A signal transmission system including a first signal transmission subsystem, a second signal transmission subsystem, and a repeater, The first signal transmission subsystem and the second signal transmission subsystem are the signal transmission subsystems of claim 9 , In the first signal transmission subsystem, the first photoelectric conversion module of the second signal processing system is connected to a first end of the repeater device, and in the second signal transmission subsystem, the first photoelectric conversion module of the first signal processing system is connected to a second end of the repeater device. A signal transmission system comprising:

13. A signal transmission system including a first signal transmission subsystem, a second signal transmission subsystem, and a repeater, The first signal transmission subsystem and the second signal transmission subsystem are the signal transmission subsystems of claim 10 , In the first signal transmission subsystem, the first photoelectric conversion module of the second signal processing system is connected to a first end of the repeater device, and in the second signal transmission subsystem, the first photoelectric conversion module of the first signal processing system is connected to a second end of the repeater device. A signal transmission system comprising:

14. A signal transmission system including a first signal transmission subsystem, a second signal transmission subsystem, and a repeater, The first signal transmission subsystem and the second signal transmission subsystem are the signal transmission subsystems of claim 11 , In the first signal transmission subsystem, the first photoelectric conversion module of the second signal processing system is connected to a first end of the repeater device, and in the second signal transmission subsystem, the first photoelectric conversion module of the first signal processing system is connected to a second end of the repeater device. A signal transmission system comprising:

15. receiving an optical signal to be transmitted that is transmitted by a time synchronization device, the optical signal to be transmitted being generated by the time synchronization device based on an initial electrical signal, the initial electrical signal including a traffic signal and a time synchronization signal, so that a signal processing device does not need to extract the time synchronization signal from the traffic signal in the process of transmitting the time synchronization signal; converting the optical signal to be transmitted into an electrical signal to be transmitted; converting the electrical signal to be transmitted into a first optical signal having a predetermined frequency; transmitting the first optical signal to the first optical path coupling device such that the first optical path coupling device couples and transmits the first optical signal to an optical signal transmission line; A signal processing method comprising:

Images