Signal processing method, device and system

Abstract

The invention discloses a signal processing method, device and system, and belongs to the field of communication. The method is applied to a first device in the communication system, and the communication system further comprises a second device and an optical fiber link connecting the first device and the second device. The method comprises the steps that when an abnormal reflection point exists in an optical fiber link, a first device receives a first signal, the first signal is a signal that a target signal sent by a second device to the first device through the optical fiber link passes through the abnormal reflection point, and a second signal except the first signal in the target signal is reflected by the abnormal reflection point. And the first device receives a fourth signal, and the fourth signal is a signal that the second device reflects the second signal and the generated third signal passes through the abnormal reflection point. The first device determines a time difference of receiving the first signal and the fourth signal or determines a time point of receiving the first signal and a time point of receiving the fourth signal. The information of the abnormal reflection point can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, in particular to a signal processing method, device and system. BACKGROUND

[0002] In an optical communication system, a plurality of optical fibers can be connected in series into one optical fiber link with a length of hundreds of meters or thousands of meters, or a longer length, between any two devices using the optical fiber link for long-distance communication.

[0003] The optical fiber link can have an abnormal reflection point, which reflects the optical signal transmitted on the optical fiber link and thus affects the optical signal. For example, for any two adjacent optical fibers in the optical fiber link, the two optical fibers are connected using a connector. In the process of connecting the two optical fibers using the connector, dirt can be left on the end face of the connector due to insufficient cleaning, and the dirt is an abnormal reflection point, which can reflect the optical signal transmitted on the optical fiber link.

[0004] Therefore, how to determine the related information of the abnormal reflection point so as to perform maintenance based on the related information is an urgent problem to be solved at present. SUMMARY

[0005] The present application provides a signal processing method, device and system to obtain the information of the abnormal reflection point. The technical solution is as follows:

[0006] In a first aspect, the present application provides a signal processing method, which is applied to a communication system including a first device, a second device and an optical fiber link connecting the first device and the second device. In the method, the second device transmits a target signal to the first device through the optical fiber link. When the optical fiber link has an abnormal reflection point, the first device receives a first signal, which is the signal of the target signal passing through the abnormal reflection point. The abnormal reflection point reflects the target signal to generate a second signal. The second device reflects the second signal to generate a third signal. The first device receives a fourth signal, which is the signal of the third signal passing through the abnormal reflection point. The time difference between the first signal and the fourth signal received by the first device is determined, or the time point of receiving the first signal and the time point of receiving the fourth signal by the first device are determined. The related information of the abnormal reflection point includes the time difference between the first signal and the fourth signal, or the related information of the abnormal reflection point includes the time point of the first signal and the time point of the fourth signal, so as to obtain the related information of the abnormal reflection point. This facilitates operation based on the related information, such as maintenance of the abnormal reflection point based on the related information.

[0007] In addition, since the wavelength of the optical signal capable of being received by the first device is the same as the wavelength of the optical signal capable of being transmitted by the second device, the first signal and the fourth signal can be received without adding any optical element on the first device, the related information of the abnormal reflection point is obtained based on the first signal and the fourth signal, and the circuit structure of the first device is simplified and the cost of obtaining the related information of the abnormal reflection point is reduced.

[0008] In a possible implementation, in a case where the time difference between the time at which the first device receives the first signal and the time at which the first device receives the fourth signal is determined, the first device obtains the position of the abnormal reflection point based on the time difference. Alternatively, in a case where the time at which the first device receives the first signal and the time at which the first device receives the fourth signal are determined, the first device obtains the position of the abnormal reflection point based on the time at which the first signal is received and the time at which the fourth signal is received. In this way, the administrator can find the abnormal reflection point on the optical fiber link based on the position.

[0009] In another possible implementation, the first device obtains signal strength difference information between the first signal and the fourth signal. The first device obtains the return loss size of the abnormal reflection point based on the signal strength difference information, and the return loss size is used to reflect the reflection degree of the abnormal reflection point on the target signal. In this way, the administrator can obtain the influence degree of the abnormal reflection point on the signal transmitted on the optical fiber link based on the return loss size, so as to provide a reference for determining whether to repair or how to repair the abnormal reflection point.

[0010] In another possible implementation, the abnormal reflection point is located on the end face of a connector included in the optical fiber link, or the abnormal reflection point is located in an optical fiber included in the optical fiber link.

[0011] In another possible implementation, in a case where the abnormal reflection point is located on the end face of a connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a damaged part on the end face of the connector. Alternatively, in a case where the abnormal reflection point is located in an optical fiber included in the optical fiber link, the abnormal reflection point includes one or more of the following: a bubble in the optical fiber, or a crack in the optical fiber.

[0012] In another possible implementation, the optical fiber link includes N optical fibers connected in series, N is an integer greater than or equal to 1, any two adjacent optical fibers in the optical fiber link are connected by using a connector, the first optical fiber of the optical fiber link is connected with the transmitter of the second device, and the Nth optical fiber of the optical fiber link is connected with the receiver of the first device.

[0013] In another possible implementation, the connector for connecting the first optical fiber and the second optical fiber of the optical fiber link comprises a first connector and a second connector, the first optical fiber is connected with the first connector, the second optical fiber is connected with the second connector, the first connector and the second connector are butted, and the transmitter, the first optical fiber and the first connector are integrated in the first optical module.

[0014] In another possible implementation, the connector for connecting the N-1th optical fiber and the Nth optical fiber of the optical fiber link comprises a third connector and a fourth connector, the N-1th optical fiber is connected with the third connector, the fourth connector is connected with the Nth optical fiber, the third connector and the fourth connector are butted, and the fourth connector, the Nth optical fiber and the receiver are integrated in the second optical module.

[0015] In a second aspect, the present application provides a signal processing method, which is applied to a communication system comprising a first device, a second device and an optical fiber link connecting the first device and the second device. In the method, the second device sends a target signal to the first device through the optical fiber link. When there is an abnormal reflection point in the optical fiber link, the first device receives a first signal and a reflected second signal, wherein the signal passing through the abnormal reflection point comprises the first signal and the second signal. The abnormal reflection point reflects the second signal to generate a third signal. The first device receives a fourth signal, and the third signal comprises the fourth signal. The time difference between the first signal and the fourth signal received by the first device is determined, or the time point at which the first signal is received and the time point at which the fourth signal is received by the first device are determined. The related information of the abnormal reflection point comprises the time difference between the first signal and the fourth signal, or the related information of the abnormal reflection point comprises the time point at which the first signal is received and the time point at which the fourth signal is received, so as to obtain the related information of the abnormal reflection point. This facilitates operation based on the related information, such as maintenance of the abnormal reflection point.

[0016] In addition, since the wavelength of the optical signal that can be received by the first device is the same as the wavelength of the optical signal that can be sent by the second device, the first signal and the fourth signal can be received without adding any optical element to the first device, and the related information of the abnormal reflection point is obtained based on the first signal and the fourth signal, which simplifies the circuit structure of the first device and reduces the cost of obtaining the related information of the abnormal reflection point.

[0017] In a possible implementation, in the case where the time difference between the first signal and the fourth signal received by the first device is determined, the first device obtains the position of the abnormal reflection point based on the time difference. Alternatively, in the case where the time point at which the first signal is received and the time point at which the fourth signal is received by the first device are determined, the first device obtains the position of the abnormal reflection point based on the time point at which the first signal is received and the time point at which the fourth signal is received. This facilitates an administrator to find the abnormal reflection point on the optical fiber link based on the position.

[0018] In a possible implementation, the first device obtains signal strength difference information between the first signal and the fourth signal. The first device obtains, based on the signal strength difference information, a back loss size of the abnormal reflection point, the back loss size reflecting a degree of reflection of the abnormal reflection point on the target signal. In this way, the administrator can obtain, based on the back loss size, a degree of influence of the abnormal reflection point on the signal transmitted on the optical fiber link, thereby providing a reference for determining whether to repair or how to repair the abnormal reflection point.

[0019] In a possible implementation, the abnormal reflection point is located on an end face of a connector included in the optical fiber link, or the abnormal reflection point is located in an optical fiber included in the optical fiber link.

[0020] In a possible implementation, in a case where the abnormal reflection point is located on an end face of a connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a damaged portion on the end face of the connector. Alternatively, in a case where the abnormal reflection point is located in an optical fiber included in the optical fiber link, the abnormal reflection point includes one or more of the following: a bubble in the optical fiber, or a crack in the optical fiber.

[0021] In a possible implementation, the optical fiber link includes N optical fibers connected in series, N is an integer greater than or equal to 1, any two adjacent optical fibers in the optical fiber link are connected by a connector, a first optical fiber of the optical fiber link is connected to the transmitter of the second device, and an Nth optical fiber of the optical fiber link is connected to the receiver of the first device.

[0022] In a possible implementation, the connector for connecting the first optical fiber and the second optical fiber of the optical fiber link includes a first connector and a second connector, the first optical fiber is connected to the first connector, the second optical fiber is connected to the second connector, the first connector and the second connector are butted, and the transmitter, the first optical fiber, and the first connector are integrated in a first optical module.

[0023] In a possible implementation, the connector for connecting the N-1th optical fiber and the Nth optical fiber of the optical fiber link includes a third connector and a fourth connector, the N-1th optical fiber is connected to the third connector, the fourth connector is connected to the Nth optical fiber, the third connector and the fourth connector are butted, and the fourth connector, the Nth optical fiber, and the receiver are integrated in a second optical module.

[0024] In a third aspect, the present application provides a signal processing method applied to a first device in a communication system, the communication system further comprising a second device and an optical fiber link connecting the first device and the second device. In the method, when an abnormal reflection point exists in the optical fiber link, the first device receives a first signal, the first signal being a signal of a target signal transmitted by the second device to the first device through the optical fiber link and passing through the abnormal reflection point, and a second signal in the target signal being reflected by the abnormal reflection point. The first device receives a fourth signal, the fourth signal being a signal of a third signal generated by the second device reflecting the second signal and passing through the abnormal reflection point. The first device determines a time difference between the first signal and the fourth signal or determines a time point of receiving the first signal and a time point of receiving the fourth signal. The information about the abnormal reflection point comprises the time difference between the first signal and the fourth signal, or the information about the abnormal reflection point comprises the time point of receiving the first signal and the time point of receiving the fourth signal, so as to obtain the information about the abnormal reflection point. This facilitates operation and maintenance based on the information about the abnormal reflection point, such as repairing the abnormal reflection point based on the information about the abnormal reflection point.

[0025] In addition, since the wavelength of the optical signal capable of being received by the first device is the same as the wavelength of the optical signal capable of being transmitted by the second device, the first signal and the fourth signal can be received without adding any optical element to the first device, and the information about the abnormal reflection point is obtained based on the first signal and the fourth signal, which simplifies the circuit structure of the first device and reduces the cost of obtaining the information about the abnormal reflection point.

[0026] In a possible implementation, in the case where the first device determines the time difference between the first signal and the fourth signal, the first device obtains the position of the abnormal reflection point based on the time difference. Alternatively, in the case where the first device determines the time point of receiving the first signal and the time point of receiving the fourth signal, the first device obtains the position of the abnormal reflection point based on the time point of receiving the first signal and the time point of receiving the fourth signal. This facilitates an administrator to find the abnormal reflection point on the optical fiber link based on the position.

[0027] In another possible implementation, the first device obtains signal intensity difference information between the first signal and the fourth signal. The first device obtains the return loss size of the abnormal reflection point based on the signal intensity difference information, the return loss size being used to reflect the reflection degree of the target signal by the abnormal reflection point. This facilitates an administrator to obtain the influence degree of the abnormal reflection point on the signal transmitted on the optical fiber link based on the return loss size, so as to provide a reference for determining whether to repair or how to repair the abnormal reflection point.

[0028] In another possible implementation, the abnormal reflection point is located on an end face of a connector included in the optical fiber link, or the abnormal reflection point is located in an optical fiber included in the optical fiber link.

[0029] In another possible implementation, in a case that the abnormal reflection point is located on an end face of a connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a broken part on the end face of the connector. Or, in a case that the abnormal reflection point is located in an optical fiber included in the optical fiber link, the abnormal reflection point includes one or more of the following: a bubble in the optical fiber, or a crack in the optical fiber.

[0030] In another possible implementation, the optical fiber link includes N optical fibers connected in series, N is an integer greater than or equal to 1, any two adjacent optical fibers in the optical fiber link are connected using a connector, a first optical fiber of the optical fiber link is connected with the transmitter of the second device, and an Nth optical fiber of the optical fiber link is connected with the receiver of the first device.

[0031] In another possible implementation, the connector for connecting the first optical fiber and the second optical fiber of the optical fiber link includes a first connector and a second connector, the first optical fiber is connected with the first connector, the second optical fiber is connected with the second connector, the first connector and the second connector are butted, and the transmitter, the first optical fiber and the first connector are integrated in the first optical module.

[0032] In another possible implementation, the connector for connecting the N-1th optical fiber and the Nth optical fiber of the optical fiber link includes a third connector and a fourth connector, the N-1th optical fiber is connected with the third connector, the fourth connector is connected with the Nth optical fiber, the third connector and the fourth connector are butted, and the fourth connector, the Nth optical fiber and the receiver are integrated in the second optical module.

[0033] In a fourth aspect, the present application provides a signal processing method, which is applied to a first device in a communication system, the communication system further includes a second device and an optical fiber link connecting the first device and the second device. In the method, when there is an abnormal reflection point in the optical fiber link, the first device receives a first signal and a reflected second signal, wherein the signal of the target signal sent by the second device to the first device through the optical fiber link and reflected by the abnormal reflection point includes the first signal and the second signal. The first device receives a fourth signal, the fourth signal is a third signal generated by the abnormal reflection point reflecting the second signal. The first device determines a time difference between receiving the first signal and the fourth signal, or determines a time point of receiving the first signal and a time point of receiving the fourth signal. Wherein, the related information of the abnormal reflection point includes the time difference between the first signal and the fourth signal, or the related information of the abnormal reflection point includes the time point of the first signal and the time point of the fourth signal, so as to obtain the related information of the abnormal reflection point. In this way, it is convenient to perform operation and maintenance based on the related information, such as repairing the abnormal reflection point based on the related information.

[0034] In addition, since the wavelength of the optical signal capable of being received by the first device is the same as the wavelength of the optical signal capable of being transmitted by the second device, the first signal and the fourth signal can be received without adding any optical element on the first device, the related information of the abnormal reflection point is obtained based on the first signal and the fourth signal, the circuit structure of the first device is simplified, and the cost of obtaining the related information of the abnormal reflection point is reduced.

[0035] In a possible implementation, in a case where the first device determines a time difference of receiving the first signal and the fourth signal, the first device obtains the position of the abnormal reflection point based on the time difference. Alternatively, in a case where the first device determines a time point of receiving the first signal and a time point of receiving the fourth signal, the first device obtains the position of the abnormal reflection point based on the time point of receiving the first signal and the time point of receiving the fourth signal. In this way, the administrator can find the abnormal reflection point on the optical fiber link based on the position.

[0036] In another possible implementation, the first device obtains signal strength difference information between the first signal and the fourth signal. The first device obtains the return loss size of the abnormal reflection point based on the signal strength difference information, and the return loss size is used to reflect the reflection degree of the abnormal reflection point on the target signal. In this way, the administrator can obtain the influence degree of the abnormal reflection point on the signal transmitted on the optical fiber link based on the return loss size, thereby providing a reference for determining whether to repair or how to repair the abnormal reflection point.

[0037] In a fifth aspect, the present application provides a communication system, which comprises the first device in the method in the first aspect or any possible implementation manner of the first aspect, the second device in the method in the first aspect or any possible implementation manner of the first aspect, and an optical fiber link connecting the first device and the second device.

[0038] In a sixth aspect, the present application provides a communication system, which comprises the first device in the method in the second aspect or any possible implementation manner of the second aspect, the second device in the method in the second aspect or any possible implementation manner of the second aspect, and an optical fiber link connecting the first device and the second device.

[0039] In a seventh aspect, the present application provides a signal processing apparatus for executing the method in the third aspect or any possible implementation manner of the third aspect. Specifically, the apparatus comprises units for executing the method in the third aspect or any possible implementation manner of the third aspect.

[0040] In an eighth aspect, the present application provides a device for signal processing, which is configured to execute the method in the fourth aspect or any possible implementation manner of the fourth aspect. Specifically, the device comprises units for executing the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0041] In a ninth aspect, the present application provides a computer program product, which comprises a computer program stored in a computer readable storage medium, and the computer program is loaded by a processor to implement the method in the third aspect, the fourth aspect, any possible implementation manner of the third aspect or any possible implementation manner of the fourth aspect.

[0042] In a tenth aspect, the present application provides a computer readable storage medium, which is configured to store a computer program, and the computer program is loaded by a processor to execute the method in the third aspect, the fourth aspect, any possible implementation manner of the third aspect or any possible implementation manner of the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a structural schematic diagram of a communication system provided by an embodiment of the present application;

[0044] Figure 2 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0045] Figure 3 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0046] Figure 4 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0047] Figure 5 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0048] Figure 6 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0049] Figure 7 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0050] Figure 8 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0051] Figure 9 is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0052] Figure 10is a signal processing method flowchart provided by an embodiment of the present application;

[0053] Figure 11 is a signal transmission schematic diagram provided by an embodiment of the present application;

[0054] Figure 12 is a signal schematic diagram provided by an embodiment of the present application;

[0055] Figure 13 is another signal processing method flowchart provided by an embodiment of the present application;

[0056] Figure 14 is another signal transmission schematic diagram provided by an embodiment of the present application;

[0057] Figure 15 is another communication system structure schematic diagram provided by an embodiment of the present application;

[0058] Figure 16 is another communication system structure schematic diagram provided by an embodiment of the present application;

[0059] Figure 17 is a signal processing device structure schematic diagram provided by an embodiment of the present application;

[0060] Figure 18 is another signal processing device structure schematic diagram provided by an embodiment of the present application;

[0061] Figure 19 is a signal processing equipment structure schematic diagram provided by an embodiment of the present application. DETAILED DESCRIPTION

[0062] Referring to Figure 1 , the present embodiment provides a communication system 100, which comprises a first device 101 and a second device 102, and the first device 101 and the second device 102 communicate using a fiber link. For example, the second device 102 can send an optical signal to the first device 101 using the fiber link.

[0063] In some embodiments, the first device 101 and the second device 102 are both communication devices or network devices. For example, the first device 101 and the second device 102 are terminal devices (such as computers), servers, routers or switches, etc.

[0064] Referring to Figure 2The first device 101 comprises a first transmitter, and the second device 102 comprises a first receiver. The optical fiber link between the first device 101 and the second device 102 comprises a first optical fiber link, and the first receiver of the first device 101 and the first transmitter of the second device 102 are connected by using the first optical fiber link. The second device 102 can send an optical signal to the first device 101 by using the first optical fiber link.

[0065] The first optical fiber link comprises N optical fibers connected in series, N is an integer greater than or equal to 1, and any two adjacent optical fibers in the first optical fiber link are connected by using a connector.

[0066] For example, referring to Figure 2 One end of the first optical fiber is connected to the first transmitter of the second device 102, the other end of the first optical fiber is connected to the second optical fiber by using a connector 103, the (i-1)th optical fiber is connected to the ith optical fiber by using a connector 103, i = 2, 3, …, N-1, the (N-1)th optical fiber is connected to one end of the Nth optical fiber by using a connector 103, and the other end of the Nth optical fiber is connected to the first receiver of the first device 101.

[0067] For example, referring to Figure 2 For any two adjacent optical fibers of the first optical fiber link, the connector 103 comprises a first connector 1031 and a second connector 1032, one of the two optical fibers is connected to the first connector 1031, and the other optical fiber is connected to the second connector 1032, the first connector 1031 and the second connector 1032 are connected, and the two optical fibers are connected in series.

[0068] For example, referring to Figure 2 The second device 102 further comprises a second receiver, and the first device 101 further comprises a second transmitter. The optical fiber link between the first device 101 and the second device 102 further comprises a second optical fiber link. The second receiver of the second device 102 and the second transmitter of the first device 101 are connected by using the second optical fiber link. The first device 101 and the second device 102 communicate by using the second optical fiber link, for example, the first device 101 can send an optical signal to the second device 102 by using the second optical fiber link.

[0069] The structure of the first optical fiber link and the structure of the second optical fiber link are the same. As shown in Figure 2 The second optical fiber link comprises N optical fibers connected in series, and any two adjacent optical fibers in the second optical fiber link are connected by using a connector.

[0070] For example, referring to Figure 2The first end of the first fiber of the second fiber link is connected with the second receiver of the second device 102, and the other end of the first fiber of the second fiber link is connected with the second fiber of the second fiber link using the connector 103. The i-1th fiber of the second fiber link is connected with the i th fiber of the second fiber link using the connector 103, i = 2, 3, …, N-1. The N-1th fiber of the second fiber link is connected with one end of the Nth fiber of the second fiber link using the connector 103, and the other end of the Nth fiber of the second fiber link is connected with the second transmitter of the first device 101.

[0071] In some embodiments, the first transmitter and the second receiver in the second device 102 are integrated in a first optical module, and the first receiver and the second transmitter in the first device 101 are integrated in a second optical module.

[0072] In some embodiments, referring to Figure 2 For the connector 103 for connecting the first fiber and the second fiber in the first fiber link, for the convenience of description, the connector 103 is referred to as the first connector, the first joint 1031 of the first connector is connected with the first fiber of the first fiber link, and the second joint 1032 of the first connector is connected with the second fiber of the first fiber link. For the connector 103 for connecting the first fiber and the second fiber in the second fiber link, for the convenience of description, the connector 103 is referred to as the second connector, the first joint 1031 of the second connector is connected with the first fiber of the second fiber link, and the second joint 1032 of the second connector is connected with the second fiber of the second fiber link. The first transmitter, the first fiber of the first fiber link, the first joint 1031 of the first connector, the second receiver, the first fiber of the second fiber link and the first joint 1031 of the second connector can be integrated in a first optical module. The first fiber of the first fiber link and the first fiber of the second fiber link can be referred to as a jumper of the first optical module. The first joint 1031 of the first connector and the first joint 1031 of the second connector can be referred to as an optical port of the first optical module.

[0073] Referring to Figure 2For the connector 103 in the first optical fiber link used to connect the (N-1)th optical fiber and the Nth optical fiber, for ease of explanation, this connector 103 is referred to as the third connector. The first connector 1031 of the third connector is connected to the (N-1)th optical fiber of the first optical fiber link, and the second connector 1032 of the third connector is connected to the Nth optical fiber of the first optical fiber link. For the connector 103 in the second optical fiber link used to connect the (N-1)th optical fiber and the Nth optical fiber, for ease of explanation, this connector 103 is referred to as the fourth connector. The first connector 1031 of the fourth connector is connected to the (N-1)th optical fiber of the second optical fiber link, and the second connector 1032 of the fourth connector is connected to the Nth optical fiber of the second optical fiber link. The first receiver, the Nth optical fiber of the first optical fiber link, the second connector 1032 of the third connector, the second transmitter, the Nth optical fiber of the second optical fiber link, and the second connector 1032 of the fourth connector can be integrated into the second optical module. The Nth optical fiber of the first optical fiber link and the Nth optical fiber of the second optical fiber link can be referred to as the patch cord of the second optical module. The second connector 1032 of the third connector and the second connector 1032 of the fourth connector can be referred to as the optical port of the second optical module.

[0074] The first transmitter, the second transmitter, the first receiver, and the second receiver mentioned above have two structures, namely the first structure and the second structure.

[0075] See Figure 3 In the first configuration shown, the first transmitter of the second device 102 includes a first processing module 1021 and a first transmitter optical subassembly (TOSA) 1022; the first receiver of the first device 101 includes a first receiver optical subassembly (ROSA) 1011 and a second processing module 1012. Furthermore, the second transmitter of the first device 101 includes a third processing module 1013 and a second TOSA 1014; and the second receiver of the second device 102 includes a second ROSA 1023 and a fourth processing module 1024.

[0076] That is, the first processing module 1021 and the fourth processing module 1024 are located in the first optical module; and the second processing module 1012 and the third processing module 1013 are located in the second optical module.

[0077] Optionally, the first processing module 1021, the second processing module 1012, the third processing module 1013 and the fourth processing module 1024 can be a switch chip, an optical digital signal processor (ODSP), a field programmable gate array (FPGA) or the like.

[0078] Referring to Figure 4 In the second structure shown, the first transmitter of the second device 102 includes the first TOSA 1022, the first receiver of the first device 101 includes the first ROSA 1011, the second device 102 further includes the first processing module 1021, and the first device 101 further includes the second processing module 1012. In addition, the second transmitter of the first device 101 includes the second TOSA 1014, the second receiver of the second device 102 includes the second ROSA 1023, the first device 101 further includes the third processing module 1013, and the second device 102 further includes the fourth processing module 1024.

[0079] That is, the first processing module 1021 and the fourth processing module 1024 are located outside the first optical module, and the second processing module 1012 and the third processing module 1013 are located outside the second optical module. Optionally, the first processing module 1021 and the fourth processing module 1024 can be located on a board card of the second device 102, and the second processing module 1012 and the third processing module 1013 can be located on a board card of the first device 101.

[0080] In the first structure or the second structure described above, the process in which the second device 102 sends an optical signal to the first device 101 using the first fiber link can be as follows: The first processing module 1021 of the second device 102 sends a first electrical signal to the first TOSA 1022 of the second device 102. The first TOSA 1022 of the second device 102 converts the first electrical signal into a first optical signal and sends the first optical signal to the first device 101 using the first fiber link. The first ROSA 1011 of the first device 101 receives the first optical signal from the first fiber link, converts the first optical signal into a first electrical signal, and sends the first electrical signal to the second processing module 1012 of the first device 101.

[0081] In the first structure or the second structure, the process that the first device 101 sends the optical signal to the second device 102 using the second optical fiber link can be: the third processing module 1013 of the first device 101 sends the second electrical signal to the second TOSA 1014 of the first device 101. The second TOSA 1014 of the first device 101 converts the second electrical signal into the second optical signal, and sends the second optical signal to the second device 102 using the second optical fiber link. The second ROSA 1023 of the second device 102 receives the second optical signal from the second optical fiber link, converts the second optical signal into the second electrical signal, and sends the second electrical signal to the fourth processing module 1024 of the second device 102.

[0082] In some embodiments, referring to Figure 5 , the first TOSA 1022 of the second device 102 includes a first driving unit and a first laser, and the first ROSA 1011 of the first device 101 includes a first amplifier and a first detector. The second ROSA 1023 of the second device 102 includes a second amplifier and a second detector, and the second TOSA 1014 of the first device 101 includes a second driving unit and a second laser.

[0083] In some embodiments, the first driving unit can be integrated in the first processing module 1021, the second driving unit can be integrated in the third processing module 1013, the first amplifier can be integrated in the second processing module 1012, and the second amplifier can be integrated in the fourth processing module 1024.

[0084] In some embodiments, the first driving unit or the second driving unit can be a driver (DRV), the first laser or the second laser can be a laser diode (LD), the first amplifier or the second amplifier can be a trans-impedance amplifier (TIA), and the first detector or the second detector can be a photoelectron diode (PD).

[0085] The process that the second device 102 sends the optical signal to the first device 101 can be that the first processing module 1021 sends the first electrical signal to the first driving unit in the first TOSA 1022. The first driving unit in the first TOSA 1022 converts the first electrical signal into the first driving signal and sends the first driving signal to the first laser in the first TOSA 1022. The first laser generates the first optical signal under the driving of the first driving signal and sends the first optical signal to the first device 101 using the first optical fiber link. The first detector in the first ROSA 1011 receives the first optical signal from the first optical fiber link, converts the first optical signal into the third electrical signal, the power of the third electrical signal is small, which can be a current signal with small amplitude, and sends the third electrical signal to the first amplifier in the first ROSA 1011. The first amplifier in the first ROSA 1011 amplifies the power of the third electrical signal to obtain the first electrical signal, the first electrical signal is a voltage signal with large amplitude, the power of the first electrical signal is large, and the first electrical signal is sent to the second processing module 1012 of the first device 101.

[0086] The process that the first device 101 sends the optical signal to the second device 102 can be that the third processing module 1013 sends the second electrical signal to the second driving unit in the second TOSA 1014. The second driving unit in the second TOSA 1014 converts the second electrical signal into the second driving signal and sends the second driving signal to the second laser in the second TOSA 1014. The second laser generates the second optical signal under the driving of the second driving signal and sends the second optical signal to the second device 102 using the second optical fiber link. The second detector in the second ROSA 1023 receives the second optical signal from the second optical fiber link, converts the second optical signal into the fourth electrical signal, the power of the fourth electrical signal is small, which can be a current signal with small amplitude, and sends the fourth electrical signal to the second amplifier in the second ROSA 1023. The second amplifier in the second ROSA 1023 amplifies the power of the fourth electrical signal to obtain the second electrical signal, the second electrical signal can be a voltage signal with large amplitude, the power of the second electrical signal is large, and the second electrical signal is sent to the fourth processing module 1024 of the second device 102.

[0087] In some embodiments, in the case of the first transmitter, the second transmitter, the first receiver and the second receiver shown in the first structure described above, the second device 102 and the first device 101 have the following three structures.

[0088] Structure 1, see Figure 6 The second device 102 can include M first transmitters and M second receivers, M is an integer greater than 1. Similarly, the first device 101 includes M first receivers and M second transmitters. The optical fiber link between the first device 101 and the second device 102 includes M first optical fiber links and M second optical fiber links.

[0089] The M first transmitters correspond to the M first receivers one by one, and the M first transmitters and the M first receivers are connected by using the M first optical fiber links. That is, for each of the M first transmitters, the first transmitter and the first receiver corresponding to the first transmitter are connected by using a first optical fiber link. The second device 102 can send M first optical signals on the M first optical fiber links to the first device 101 through the M first transmitters, and the first device 101 receives the M first optical signals from the M first optical fiber links through the M first receivers.

[0090] The M second transmitters correspond to the M second receivers one by one, and the M second transmitters and the M second receivers are connected by using the M second optical fiber links. That is, for each of the M second transmitters, the second transmitter and the second receiver corresponding to the second transmitter are connected by using a second optical fiber link. The first device 101 can send M second optical signals on the M second optical fiber links to the second device 102 through the M second transmitters, and the second device 102 receives the M second optical signals from the M second optical fiber links through the M second receivers.

[0091] Optionally, M = 4, 8, or 16, etc.

[0092] Structure 2, see Figure 7 The second device 102 can include M first transmitters, M second receivers, a first multiplexer, and a second multiplexer. The first device 101 includes M first receivers, M second transmitters, a third multiplexer, and a fourth multiplexer. The optical fiber link between the first device 101 and the second device 102 includes a first optical fiber link and a second optical fiber link.

[0093] The M first transmitters include first lasers, each of which is connected to the first multiplexer, and the M first receivers include first detectors, each of which is connected to the third multiplexer, and the first multiplexer and the third multiplexer are connected by using the first optical fiber link. The second device 102 can send M first optical signals to the first multiplexer through the M first transmitters, the first multiplexer combines the M first optical signals into one optical signal, and sends the one optical signal to the first device 101 by using the first optical fiber link. The third multiplexer of the first device 101 receives the one optical signal from the first optical fiber link, decomposes the M first optical signals from the one optical signal, and sends the M first optical signals to the M first receivers, and the M first receivers receive the M first optical signals.

[0094] The M second transmitters include second lasers, and the M second receivers include second detectors. The M second lasers are connected with the fourth multiplexer, and the M second detectors are connected with the second multiplexer. The second multiplexer and the fourth multiplexer are connected by using the second optical fiber link. The first device 101 can send M second optical signals to the fourth multiplexer by using the M second transmitters. The fourth multiplexer combines the M second optical signals into one optical signal, and sends the one optical signal to the second device 102 by using the second optical fiber link. The second multiplexer of the second device 102 receives the one optical signal from the second optical fiber link, separates the M second optical signals from the one optical signal, and sends the M second optical signals to the M second receivers. The M second receivers receive the M second optical signals.

[0095] Structure 3, see Figure 8 The second device 102 can include a first transmitter, a second receiver, and a first multiplexer. The first device 101 includes a first receiver, a second transmitter, and a second multiplexer. The optical fiber link between the first device 101 and the second device 102 includes the same first optical fiber link and the same second optical fiber link, so that the number of optical fiber links can be reduced.

[0096] The first transmitter includes a first laser, and the second receiver includes a second detector. The first laser is connected with the first multiplexer, and the second detector is connected with the second multiplexer. The first receiver includes a first detector, and the second transmitter includes a second laser. The first detector is connected with the second multiplexer, and the second laser is connected with the first multiplexer. The first multiplexer and the second multiplexer are connected by using the one optical fiber link.

[0097] The second device 102 can send a first optical signal to the first multiplexer by using the first transmitter. The first multiplexer sends the first optical signal to the first device 101 by using the optical fiber link. The second multiplexer of the first device 101 receives the first optical signal from the optical fiber link, and sends the first optical signal to the first receiver. The first receiver receives the first optical signal. The first device 101 can send a second optical signal to the second multiplexer by using the second transmitter. The second multiplexer sends the second optical signal to the second device 102 by using the optical fiber link. The first multiplexer of the second device 102 receives the second optical signal from the optical fiber link, and sends the second optical signal to the second receiver. The second receiver receives the second optical signal.

[0098] The wavelength of the first optical signal is different from the wavelength of the second optical signal. For example, the wavelength of the first optical signal is 850 nm, and the wavelength of the second optical signal is 910 nm, etc.

[0099] In some embodiments, in the case of the first transmitter, the second transmitter, the first receiver, and the second receiver shown in the second structure, the second device 102 and the first device 101 also have three structures. See Figure 5The second device 102 and the first device 101 in this case are different from the above-described structure 1, structure 2 and structure 3 in that the first processing module 1021 in the second device 102 is located outside the second transmitter, the fourth processing module 1024 in the second device 102 is located outside the second receiver, the second processing module 1012 in the first device 101 is located outside the first receiver, and the third processing module 1013 in the first device 101 is located outside the second transmitter. In this case, the three structures are not described one by one.

[0100] In some embodiments, referring to Figure 1 The communication system 100 further includes a management device 104, which can communicate with the first device 101 and the second device 102, and can manage the first device 101 and the second device 102.

[0101] For any optical fiber link (such as the above-described first optical fiber link or second optical fiber link), there can be at least one abnormal reflection point on the optical fiber link, which can reflect part of the optical signal when the optical signal is transmitted on the optical fiber link, thereby affecting the optical signal transmitted on the optical fiber link.

[0102] The abnormal reflection point is a reflection point on the optical fiber link that reflects the optical signal with high intensity. For example, the abnormal reflection point is a reflection point on the optical fiber link that reflects the optical signal with an intensity exceeding a first intensity threshold.

[0103] The abnormal reflection point can be located on the end face of a connector included in the optical fiber link, or the abnormal reflection point is located in an optical fiber included in the optical fiber link.

[0104] In the case where the abnormal reflection point is located on the end face of a connector included in the optical fiber link, the abnormal reflection point can be a dirty or damaged part on the end face of the connector, or the abnormal reflection point is a virtual connection space between a first connector and a second connector included in the connector, which can exist due to the fact that the first connector and the second connector are not completely connected when the first connector and the second connector are connected.

[0105] In the case where the abnormal reflection point is located in an optical fiber included in the optical fiber link, the abnormal reflection point can be a bubble in the optical fiber or a crack in the optical fiber.

[0106] For the abnormal reflection point, the information of the abnormal reflection point can be obtained by adding a coupler and a receiver at the transmitting side, and then the abnormal reflection point on the fiber link can be repaired or other operations based on the information. Alternatively, the information of the abnormal reflection point can include one or more of the following information: the position of the abnormal reflection point or the return loss size of the abnormal reflection point, etc., which reflects the degree of reflection of the abnormal reflection point on the optical signal transmitted on the fiber link.

[0107] In the above Figures 1-8 In the communication system 100 shown in any embodiment, the second device 102 is taken as the transmitting side, and after the second device 102 transmits the optical signal on the fiber link, the abnormal reflection point on the fiber link reflects part of the optical signal to the transmitter of the second device 102, so the second device 102 cannot receive the part of the optical signal. In order to enable the second device 102 to receive the part of the optical signal reflected by the abnormal reflection point, referring to Figure 9 A fifth coupler and a third receiver are added to the second device 102, the first transmitter and the third receiver are connected to the fifth coupler, the fifth coupler is connected to the fiber link, and the wavelength of the optical signal that the fifth coupler can receive is the same as the wavelength of the optical signal that the first transmitter can transmit. In this way, the fifth coupler can receive the part of the optical signal reflected by the abnormal reflection point from the fiber link, transmit the part of the optical signal to the third receiver, and the second device 102 can obtain the information of the abnormal reflection point based on the optical signal transmitted by the first transmitter and the part of the optical signal received by the third receiver.

[0108] For example, in Figure 6The second device 102 of the structure 1 in the communication system 100 shown in the figure, the second device 102 includes M first transmitters, so it is necessary to increase M fifth combiners and M third receivers in the second device 102, the M fifth combiners correspond to the M first transmitters one by one, and the M fifth combiners correspond to the M third receivers one by one. For each first transmitter, the fifth combiner corresponding to the first transmitter and the third receiver corresponding to the fifth combiner, the first transmitter and the third receiver are connected with the fifth combiner, and the fifth combiner is connected with the first fiber link corresponding to the first transmitter. The first transmitter sends an optical signal to the fifth combiner, the fifth combiner sends the optical signal on the first fiber link, and the abnormal reflection point on the first fiber link reflects part of the signal in the optical signal to the fifth combiner. The fifth combiner receives the part of the signal from the first fiber link and sends it to the third receiver. The second device 102 acquires the time difference between the transmission time of the optical signal sent by the first transmitter and the reception time of the part of the signal received by the third receiver, and acquires the information of the abnormal reflection point based on the time difference, the information including the distance of the abnormal reflection point from the second device 102. Wherein, for the second fiber link, the first device 101 can be taken as the sending side, and the information of the abnormal reflection point on the second fiber link can be obtained by increasing M fifth combiners and M third receivers on the first device 101 in the above manner.

[0109] For another example, in Figure 7The second device 102 of structure 2 in the communication system 100 shown includes M first transmitters and first multiplexers / demultiplexers. Therefore, a fifth multiplexer / demultiplexer and M third receivers need to be added to the second device 102, with each of the M first transmitters corresponding to one of the M third receivers. The first multiplexer / demultiplexer and the M third receivers of the second device 102 are all connected to the fifth multiplexer / demultiplexer, which is connected to a first optical fiber link. For each first transmitter and its corresponding third receiver, the first transmitter sends an optical signal to the first multiplexer / demultiplexer, which then sends an optical signal to the fifth multiplexer / demultiplexer. The fifth multiplexer / demultiplexer transmits this optical signal on the first optical fiber link, and abnormal reflection points on the first optical fiber link reflect a portion of the optical signal back to the fifth multiplexer / demultiplexer. The fifth multiplexer / demultiplexer receives this portion of the signal from the first optical fiber link and transmits it to the third receiver. The second device 102 acquires the time difference between the transmission time of the optical signal sent by the first transmitter and the reception time of the partial signal received by the third receiver. Based on this time difference, it acquires information about the abnormal reflection point, including the distance of the abnormal reflection point from the second device 102. Specifically, for the second fiber optic link, the first device 101 can be used as the transmitting side, and information about abnormal reflection points on the second fiber optic link can be obtained by adding a fifth multiplexer / demultiplexer and M third receivers to the first device 101 as described above.

[0110] For example, in Figure 8 The second device 102 of structure 3 in the communication system 100 shown has a third receiver and a fifth multiplexer / demultiplexer added to it. Both the first multiplexer / demultiplexer and the third receiver of the second device 102 are connected to the fifth multiplexer / demultiplexer, which is connected to an optical fiber link. The first transmitter of the second device 102 sends an optical signal to the first multiplexer / demultiplexer, which in turn sends an optical signal to the fifth multiplexer / demultiplexer. The fifth multiplexer / demultiplexer transmits the optical signal on the optical fiber link. An abnormal reflection point on the optical fiber link reflects a portion of the optical signal back to the fifth multiplexer / demultiplexer. The fifth multiplexer / demultiplexer receives this portion of the signal from the optical fiber link and transmits it to the third receiver. The second device 102 obtains the time difference between the transmission time of the optical signal sent by the first transmitter and the reception time of the portion of the signal received by the third receiver. Based on this time difference, it obtains information about the abnormal reflection point, including its distance from the second device 102.

[0111] While adding multiplexers and receivers on the transmitting side can obtain information about abnormal reflection points, it requires adding a fifth multiplexer and a third receiver, which complicates the equipment circuit structure and increases costs.

[0112] In order to simplify the device circuit structure and reduce the cost of obtaining the information of the abnormal reflection point, the information of the abnormal reflection point can be obtained by any of the following examples, and then the abnormal reflection point on the optical fiber link is repaired or other operations based on the information.

[0113] Referring to Figure 10 The embodiment of the present application provides a signal processing method 1000, which is applied to Figures 1-8 The communication system 100 provided by any of the embodiments. In the method 1000, the second device sends a target signal to the first device using an optical fiber link, an abnormal reflection point on the optical fiber link reflects part of the target signal to the second device, the second device reflects part of the part of the target signal to the abnormal reflection point, the first device receives the signal of the target signal passing through the abnormal reflection point and the signal of the part passing through the abnormal reflection point, and obtains the information of the abnormal reflection point based on the two received signals. The method 1000 includes the following steps 1001 to 1005.

[0114] Step 1001: The second device sends a target signal to the first device using an optical fiber link, and the target signal is an optical signal.

[0115] In some embodiments, the management device sends indication information for triggering detection of the abnormal reflection point to the second device and the first device. After the second device and the first device receive the indication information, the second device and the first device start to execute the signal processing method 1000 of the embodiments of the present application, that is, the second device executes the step of sending the target signal to the first device.

[0116] In some embodiments, the second device sends the indication information to the first device when determining to execute the signal processing method 1000 of the embodiments of the present application, the first device receives the indication information, and determines to execute the signal processing method 1000 of the embodiments of the present application. Then, the second device executes the step of sending the target signal to the first device.

[0117] In some embodiments, the first device sends the indication information to the second device when determining to execute the signal processing method 1000 of the embodiments of the present application, the second device receives the indication information, and executes the step of sending the target signal to the first device based on the indication information.

[0118] Referring to Figure 3 Or Figure 5 The second device includes a first transmitter, and the first transmitter includes a first processing module and a first TOSA. The first processing module sends a first electrical signal to the first TOSA. Alternatively, referring to Figure 4The second device includes a first processing module and a first transmitter, and the first transmitter includes a first TOSA. The first processing module can send a first electrical signal to the first TOSA. Then, the first TOSA converts the first electrical signal into an optical signal, which is a target signal, and sends the target signal to the first device using an optical fiber link.

[0119] In some embodiments, the first electrical signal is a bit 1, and the first electrical signal is a single-pulse signal.

[0120] In some embodiments, the first electrical signal is a specified code stream sequence, which can be sent by the management device to the second device, or configured in the second device when the second device is manufactured, or obtained by the second device in other ways. Alternatively, the first electrical signal is randomly generated by the first processing module.

[0121] In some embodiments, the specified code stream sequence is a pseudo-random code, 101010, 11100011, 11110001, or 101010101, etc.

[0122] In some embodiments, the second device and the first device are respectively Figure 6 As shown in the communication system 100, the second device and the first device are respectively the second device and the first device shown in structure 1. The second device includes M first transmitters, and the first device includes M first receivers. The M first transmitters and the M first receivers are connected using M first optical fiber links. In this case, in order to obtain the information of the abnormal reflection points on each first optical fiber link, the M first transmitters of the second device send M target signals to the first device on the M first optical fiber links. One target signal is transmitted on each first optical fiber link in the M first optical fiber links, so that the information of the abnormal reflection points on the first optical fiber link can be obtained using the target signal.

[0123] In some embodiments, the second device and the first device are respectively Figure 7The second device and the first device in the communication system 100 shown are, respectively, the second device and the first device shown in structure 2 above. The second device includes M first transmitters and a first multiplexer / demultiplexer, and the first device includes M first receivers and a third multiplexer / demultiplexer. The first multiplexer / demultiplexer and the third multiplexer / demultiplexer are connected by a first optical fiber link. In this case, in order to obtain information about abnormal reflection points on the first optical fiber link, the multiple first transmitters of the second device send multiple target sub-signals to the first multiplexer / demultiplexer, and the M first transmitters include the multiple first transmitters. Optionally, the multiple target sub-signals are optical signals with different wavelengths. The first multiplexer / demultiplexer combines the multiple target sub-signals into a single target signal and sends the target signal to the first device using the first optical fiber link, thereby using the target signal to obtain information about abnormal reflection points on the first optical fiber link.

[0124] The second device and the first device are respectively Figure 8 The second device and the first device in the communication system 100 shown are, respectively, the second device and the first device shown in structure 3 above. The second device includes a first transmitter and a first multiplexer / demultiplexer, and the first device includes a first receiver and a second multiplexer / demultiplexer. The first multiplexer / demultiplexer and the second multiplexer / demultiplexer are connected by an optical fiber link. In this case, in order to obtain information about abnormal reflection points on the optical fiber link, the first transmitter of the second device sends a target signal to the first multiplexer / demultiplexer. The first multiplexer / demultiplexer uses the optical fiber link to send the target signal back to the first device, thereby using the target signal to obtain information about abnormal reflection points on the optical fiber link.

[0125] See Figure 11 When the fiber optic link connecting the first device and the second device (e.g. Figure 6 or Figure 7 The first fiber optic link in, or Figure 8 When an abnormal reflection point exists on the optical fiber link (in the context of the optical fiber link), when the target signal transmitted on the optical fiber link reaches the abnormal reflection point, the abnormal reflection point reflects a portion of the target signal back to the second device. The signal in the target signal other than this portion passes through the abnormal reflection point and continues to be transmitted to the first device. For ease of explanation, the signal in the target signal other than this portion is referred to as the first signal, and the portion is referred to as the second signal. That is, the target signal includes the first signal and the second signal.

[0126] When an abnormal reflection point exists on the fiber optic link connecting the first device and the second device, the following step 1002 will be executed.

[0127] Step 1002: When there is an abnormal reflection point in the optical fiber link, the abnormal reflection point reflects the target signal and generates a second signal. The first signal in the target signal passes through the abnormal reflection point and is transmitted to the first device.

[0128] Referring to Figure 11 , the second signal is a part of the target signal reflected by the abnormal reflection point to the second device, and the second signal is transmitted to the second device on the optical fiber link.

[0129] In some embodiments, there can be at least one abnormal reflection point on the optical fiber link. In the case that there is at least one abnormal reflection point on the optical fiber link, each abnormal reflection point can reflect a second signal to the second device.

[0130] Step 1003: The second device reflects the second signal to generate a third signal.

[0131] The second signal is transmitted to a first transmitter of the second device on the optical fiber link, the first transmitter reflects a part of the second signal to the abnormal reflection point, and the third signal includes the part of the second signal reflected by the first transmitter.

[0132] Optionally, a first TOSA in the first transmitter reflects a part of the second signal to the abnormal reflection point.

[0133] Referring to Figure 11 , the third signal is transmitted on the optical fiber link, and when the third signal is transmitted to the abnormal reflection point on the optical fiber link, the abnormal reflection point reflects a part of the third signal to the second device, and the signal of the third signal other than the part of the signal passes through the abnormal reflection point and continues to be transmitted to the first device. For ease of description, the signal of the third signal other than the part of the signal is referred to as a fourth signal, and the third signal includes the fourth signal.

[0134] In some embodiments, there is at least one abnormal reflection point on the optical fiber link, and there is at least one second signal transmitted to the second device, and the second device reflects a part of each second signal to the abnormal reflection point. That is, there is at least one third signal transmitted to the abnormal reflection point on the optical fiber link, the at least one second signal corresponds to the at least one third signal one-to-one. There is at least one fourth signal passing through the abnormal reflection point and being transmitted to the first device, the at least one fourth signal corresponds to the at least one third signal one-to-one, and the at least one fourth signal corresponds to the at least one abnormal reflection point one-to-one.

[0135] Step 1004: The first device receives the first signal and the fourth signal, the fourth signal is the signal of the third signal passing through the abnormal reflection point, and determines the time difference of receiving the first signal and the fourth signal or determines the time point of receiving the first signal and the time point of receiving the fourth signal.

[0136] In step 1004, the first device receives the first signal first, and then receives the fourth signal. The fourth signal is a signal with a relatively strong signal strength, and the signal strength of the fourth signal can be weaker than the signal strength of the first signal. Alternatively, referring to Figure 12 After the first device receives the first signal, the fourth signal is a signal with a code stream sequence identical to or similar to the code stream sequence of the first signal.

[0137] In some embodiments, the strength of the signal reflected by the first transmitter is higher than the strength of the signal reflected by the first receiver, so that the fourth signal received by the first device has a relatively strong signal strength. That is, in this case, the fourth signal received by the first device has a signal strength higher than the second strength threshold; alternatively, referring to Figure 12 The code stream sequence of the first signal received by the first device is identical to or similar to the code stream sequence of the fourth signal. Therefore, after receiving the first signal, the first device regards the signal with a signal strength higher than the second strength threshold as the fourth signal or regards the signal with a code stream sequence identical to or similar to the code stream sequence of the first signal as the fourth signal.

[0138] In some embodiments, the optical fiber link can include at least one abnormal reflection point, so that the first device can receive the first signal and at least one fourth signal corresponding to the at least one abnormal reflection point. For each abnormal reflection point, the first device determines the time difference between receiving the first signal and the fourth signal corresponding to the abnormal reflection point or determines the time point of receiving the first signal and the time point of receiving the fourth signal corresponding to the abnormal reflection point.

[0139] In some embodiments, the first device can obtain the time point of receiving the first signal and the time point of receiving the fourth signal corresponding to the abnormal reflection point, and based on the time point of receiving the first signal and the time point of receiving the fourth signal corresponding to the abnormal reflection point, obtain the time difference between receiving the first signal and the fourth signal corresponding to the abnormal reflection point. Alternatively, the first device can perform convolution operation on the first signal and the fourth signal corresponding to the abnormal reflection point to obtain the time difference between receiving the first signal and the fourth signal corresponding to the abnormal reflection point. In addition to the above-mentioned ways of obtaining the time difference, other ways of obtaining the time difference can also be used, which will not be listed one by one here.

[0140] The first device includes a first receiver connected to the first transmitter of the second device using an optical fiber link, and the wavelength of the optical signal that the first transmitter can send is the same as the wavelength of the optical signal that the first receiver can receive. Therefore, in step 1004, the first device can receive the first signal and the fourth signal from the optical fiber link without adding a fifth wavelength division multiplexer and a third receiver, which can simplify the circuit structure of the device and reduce the cost compared with the above-mentioned way of adding a wavelength division multiplexer and a receiver on the sending side.

[0141] Step 1005: The first device obtains information of the abnormal reflection point based on the time difference between the first signal and the fourth signal, or the time point of the first signal and the time point of the fourth signal.

[0142] In some embodiments, the information of the abnormal reflection point includes one or more of the following: the position of the abnormal reflection point, or the return loss size of the abnormal reflection point, etc.

[0143] In some embodiments, the information of the abnormal reflection point includes the position of the abnormal reflection point, which is optionally the position of the abnormal reflection point from the second device. In step 1005, in the case that the first device determines the time point of the first signal and the time point of the fourth signal, the first device obtains the time difference between the time of receiving the first signal and the time of receiving the fourth signal based on the time point of the first signal and the time point of the fourth signal, and obtains the position of the abnormal reflection point based on the time difference. Or, in the case that the first device determines the time difference between the time of receiving the first signal and the time of receiving the fourth signal, the first device obtains the position of the abnormal reflection point based on the time difference.

[0144] In some embodiments, the optical fiber link can include at least one abnormal reflection point, and for each abnormal reflection point, the first device can obtain the time difference between the time of receiving the first signal and the time of receiving the fourth signal corresponding to the abnormal reflection point, and obtain the position of the abnormal reflection point based on the time difference according to the following first formula, which is the position of the abnormal reflection point from the second device.

[0145] The first formula is: L1 = T1 * V / 2.

[0146] In the first formula, L1 is the position of the abnormal reflection point from the second device, T1 is the time difference, and V is the transmission rate of the target signal.

[0147] In some embodiments, the second device and the first device are respectively the second device and the first device shown in structure 2 in the communication system 100 shown in FIG. 1A. Figure 7 The target signal sent by the second device includes a plurality of target sub-signals, the plurality of target sub-signals are sent by a plurality of first transmitters on the second device, and the first device includes a plurality of first receivers corresponding to the plurality of first transmitters in the M first receivers of the first device. The first signal includes a plurality of first sub-signals corresponding to the plurality of target sub-signals, and the fourth signal corresponding to the abnormal reflection point includes a plurality of fourth sub-signals corresponding to the plurality of target sub-signals.

[0148] In this case, the first device receives the first signal from the first fiber link through the third multiplexer, decomposes a plurality of first sub-signals from the first signal, and sends the plurality of first sub-signals to the plurality of first receivers. The fourth signal corresponding to the abnormal reflection point is received from the first fiber link through the third multiplexer, a plurality of fourth sub-signals are decomposed from the fourth signal, and the plurality of fourth sub-signals are sent to the plurality of first receivers. The plurality of first sub-signals and the plurality of fourth sub-signals are one-to-one corresponding, and the one-to-one corresponding first sub-signal and fourth sub-signal are signals received by the same first receiver.

[0149] Then, for each of the plurality of first sub-signals, the first device can obtain a time difference between receiving each first sub-signal and a fourth sub-signal corresponding to each first sub-signal, and obtain the position of the abnormal reflection point based on the time difference between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal.

[0150] Wherein, the time difference between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal is a plurality of time differences.

[0151] Optionally, the first device calculates an average time difference between the plurality of time differences, and obtains the position of the abnormal reflection point based on the average time difference according to the first formula. Alternatively, the first device selects a median from the plurality of time differences, and obtains the position of the abnormal reflection point based on the median according to the first formula.

[0152] Optionally, for the plurality of time differences, based on each time difference in the plurality of time differences, the position corresponding to each time difference can be obtained according to the first formula, and a plurality of positions corresponding to the plurality of time differences are obtained. The average position of the plurality of positions is calculated, and the average position is taken as the position of the abnormal reflection point; or a median is selected from the plurality of positions, and the selected median is taken as the position of the abnormal reflection point.

[0153] In some embodiments, the information of the abnormal reflection point includes the return loss size of the abnormal reflection point. In step 1005, the first device obtains signal intensity difference information between the first signal and the fourth signal corresponding to the abnormal reflection point. Based on the signal intensity difference information, the return loss size of the abnormal reflection point is obtained.

[0154] Optionally, the signal intensity difference information includes a signal intensity difference value between the signal intensity of the first signal and the signal intensity of the fourth signal corresponding to the abnormal reflection point. Alternatively, the signal intensity difference information includes a signal intensity ratio between the signal intensity of the first signal and the signal intensity of the fourth signal corresponding to the abnormal reflection point. In implementation,

[0155] The first device can obtain a first signal strength P1 of the first signal and a first signal strength P2 of the fourth signal corresponding to the abnormal reflection point, the units of the first signal strength P1 of the first signal and the first signal strength P2 of the fourth signal being milliwatts, and obtain a signal strength ratio P1 / P2 based on the first signal strength P1 of the first signal and the first signal strength P2 of the fourth signal corresponding to the abnormal reflection point. Alternatively, the first device can obtain a second signal strength P11 of the first signal and a second signal strength P21 of the fourth signal corresponding to the abnormal reflection point, the units of the second signal strength P11 of the first signal and the second signal strength P21 of the fourth signal being dbm, P11=log 10 P1, P21=log 10 P2, and obtain a signal strength difference P11-P21 based on the second signal strength P11 of the first signal and the second signal strength P21 of the fourth signal corresponding to the abnormal reflection point.

[0156] In some embodiments, the signal strength difference information includes the signal strength ratio P1 / P2, and the first device obtains the return loss size of the abnormal reflection point based on the signal strength difference information according to a second formula as follows.

[0157] The second formula is: RLd=10*log 10 (P1 / P2)-RLt.

[0158] In the second formula, RLd is the return loss size of the abnormal reflection point. RLt is the return loss size of the first transmitter, and RLt is a value obtained by the first device in advance and is a fixed value.

[0159] In some embodiments, the signal strength difference information includes the signal strength difference P11-P21, and the first device obtains the return loss size of the abnormal reflection point based on the signal strength difference information according to a third formula as follows.

[0160] The third formula is: RLd=P11-P21-RLt.

[0161] In the third formula, RLd is still the return loss size of the abnormal reflection point, and RLt is still the return loss size of the first transmitter.

[0162] In some embodiments, the second device and the first device are respectively the second device and the first device shown in structure 2 in the communication system 100 shown in FIG. 1. Figure 7 The first signal includes a plurality of first sub-signals, and the fourth signal corresponding to the abnormal reflection point includes a plurality of fourth sub-signals.

[0163] In this case, for each of the plurality of first sub-signals, the first device can obtain signal strength difference information between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal, and obtain the return loss size of the abnormal reflection point based on the signal strength difference information between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal.

[0164] The signal strength difference information between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal includes a plurality of signal strength difference information.

[0165] Alternatively, the first device can calculate an average signal strength difference information between the plurality of signal strength difference information, and obtain the return loss size of the abnormal reflection point based on the average signal strength difference information according to the second formula or the third formula. Alternatively, the first device can select a median from the plurality of signal strength difference information, and obtain the return loss size of the abnormal reflection point based on the median according to the second formula or the third formula.

[0166] Alternatively, for the plurality of signal strength difference information, based on each signal strength difference information in the plurality of signal strength difference information, the return loss size corresponding to each signal strength difference information can be obtained according to the second formula or the third formula, and a plurality of return loss sizes corresponding to the plurality of signal strength difference information are obtained. The average return loss size of the plurality of return loss sizes is calculated, and the average return loss size is taken as the return loss size of the abnormal reflection point; or a median is selected from the plurality of return loss sizes, and the selected median is taken as the return loss size of the abnormal reflection point.

[0167] In some embodiments, the first device and the second device are respectively the first device and the second device shown in the structure 1 shown in FIG. 1 or the structure 3 shown in FIG. 3. Figure 6 Figure 8 In the case that the first device and the second device are respectively the first device and the second device shown in the structure 1 shown in FIG. 1 or the structure 3 shown in FIG. 3, the second device can cyclically send the target signal N times, and the first device cyclically executes the operations of steps 1004-1005 N times to obtain N information of the abnormal reflection point, N is an integer greater than 1, and the information of the abnormal reflection point is obtained based on the N information. For example, the N information includes N positions, and the N positions can be averaged to obtain the position of the abnormal reflection point, or a median can be selected from the N positions, and the selected median is taken as the position of the abnormal reflection point. The N information includes N return loss sizes, and the N return loss sizes can be averaged to obtain the return loss size of the abnormal reflection point, or a median can be selected from the N return loss sizes, and the selected median is taken as the return loss size of the abnormal reflection point. In this way, the accuracy of detecting the information of the abnormal reflection point can be improved.

[0168] In some embodiments, the first device and the second device are respectively the first device and the second device shown in the structure 1 shown in FIG. 1 or the structure 3 shown in FIG. 3. Figure 7 ​In the case of the first device and the second device shown in structure 2 shown in the structure, the target signal sent by the second device includes Q target sub-signals, Q is an integer greater than 1 and less than or equal to M. The second device can send the target signal N / Q times in a loop, and the first device performs the operations of steps 1004-1005 N / Q times in a loop to obtain N / Q information of the abnormal reflection point, and obtains the information of the abnormal reflection point based on the N / Q information. In this way, the number of loops can be reduced, and the efficiency of detecting the abnormal reflection point can be improved.

[0169] In some embodiments, the first device can also send the information of the abnormal reflection point to the management device corresponding to the administrator, so that the management device determines whether to repair the abnormal reflection point based on the information of the abnormal reflection point.

[0170] For example, the management device determines whether the abnormal reflection point needs to be repaired based on the return loss size of the abnormal reflection point. For example, when the return loss size of the abnormal reflection point exceeds the return loss size threshold, the degree of reflection of the abnormal reflection point on the optical signal transmitted on the optical fiber link is high, and it is determined that the abnormal reflection point needs to be repaired.

[0171] When the management device determines that the abnormal reflection point needs to be repaired, the position of the abnormal reflection point can be displayed. In this way, the administrator can refer to the position of the abnormal reflection point to find the abnormal reflection point on the optical fiber link and repair the abnormal reflection point.

[0172] In some embodiments, when the management device displays the position of the abnormal reflection point, the administrator may not know that the position is the position of the abnormal reflection point from the second device. The administrator can first consider that the position is the position of the abnormal reflection point from the first device, and the administrator finds the abnormal reflection point on the optical fiber link based on the position. If the abnormal reflection point is not found, it is concluded that the position of the abnormal reflection point is the position of the abnormal reflection point from the second device.

[0173] In the embodiment of the present application, the second device sends a target signal to the first device on the optical fiber link through the first transmitter. An abnormal reflection point on the optical fiber link reflects a second signal in the target signal to the second device, the second device reflects a third signal in the second signal to the abnormal reflection point, and a fourth signal in the third signal passes through the abnormal reflection point. The first device receives the first signal and the fourth signal from the optical fiber link through the first receiver. Since the wavelength of the optical signal that can be sent by the first transmitter of the second device is the same as the wavelength of the optical signal that can be received by the first receiver of the first device, the first device can receive the first signal and the fourth signal from the optical fiber link through the first receiver, so that an additional wavelength division multiplexer and receiver do not need to be added on the first device, the circuit structure of the first device is simplified, the cost of the first device and the cost of obtaining the information of the abnormal reflection point are reduced, and the abnormal reflection point is repaired and the like based on the information of the abnormal reflection point.

[0174] Referring to Figure 13 , the embodiment of the present application provides a signal processing method 1300, which is applied to Figures 1-8 Any embodiment of the communication system 100. In the method 1300, the second device sends a target signal to the first device using an optical fiber link, when the target signal is transmitted to an abnormal reflection point on the optical fiber link, part of the target signal passes through the abnormal reflection point and continues to be transmitted to the first device. The first device receives a first signal in the part of the signal and a second signal in the part of the signal reflected to the abnormal reflection point, the abnormal reflection point reflects part of the second signal to the first device to obtain a third signal, and the third signal is transmitted to the first device. The first device receives a fourth signal, the third signal includes the fourth signal, and the information of the abnormal reflection point is obtained based on the received first signal and the fourth signal. The method 1300 includes the following steps 1301 to 1305.

[0175] Step 1301: The second device sends a target signal to the first device using an optical fiber link, and the target signal is an optical signal.

[0176] The detailed implementation process of the second device sending the target signal to the first device is described in detail with reference to the related content in the method 1001 shown in Figure 10 , and will not be described in detail here.

[0177] Referring to Figure 14 , when the optical fiber link (such as the first optical fiber link in Figure 6 or Figure 7 , or the optical fiber link in Figure 8When there is an abnormal reflection point on the optical fiber link (e.g., the optical fiber link in the optical fiber link 102 in FIG. 1), when a target signal transmitted on the optical fiber link reaches the abnormal reflection point, part of the target signal passes through the abnormal reflection point and continues to be transmitted to the first device. The abnormal reflection point reflects the signal in the target signal other than the part of the signal to the second device.

[0178] When there is an abnormal reflection point on the optical fiber link connecting the first device and the second device, the following step 1302 is performed.

[0179] Step 1302: When there is an abnormal reflection point on the optical fiber link, the first device receives a first signal and reflects a second signal to the abnormal reflection point, the signal of the target signal passing through the abnormal reflection point includes the first signal and the second signal.

[0180] Referring to Figure 14 In step 1302, when the part of the target signal passing through the abnormal reflection point is transmitted to the first device, the first device receives part of the part of the signal, the part of the signal being the first signal, and reflects the signal in the part of the signal other than the part of the signal to the abnormal reflection point, the signal in the part of the signal other than the part of the signal being the second signal.

[0181] In some embodiments, on the optical fiber link, the part of the target signal passing through the abnormal reflection point is transmitted to a first receiver of the first device, the first receiver receives the first signal and reflects the second signal to the abnormal reflection point.

[0182] Optionally, a first ROSA in the first receiver receives the first signal and reflects the second signal to the abnormal reflection point.

[0183] Step 1303: The abnormal reflection point reflects the second signal to generate a third signal.

[0184] Referring to Figure 14 On the optical fiber link, when the second signal is transmitted to the abnormal reflection point, the abnormal reflection point reflects part of the second signal to the first device, and the third signal includes the part of the second signal.

[0185] In some embodiments, there is at least one abnormal reflection point on the optical fiber link, and the second signal is reflected by the at least one abnormal reflection point to obtain at least one third signal corresponding to the at least one abnormal reflection point one-to-one, and the at least one third signal is transmitted to the first device.

[0186] Step 1304: The first device receives a fourth signal, the third signal includes the fourth signal, and determines a time difference between receiving the first signal and the fourth signal or determines a time point of receiving the first signal and a time point of receiving the fourth signal.

[0187] Referring to Figure 14The third signal is transmitted on the optical fiber link, the first device reflects part of the third signal to the abnormal reflection point, and receives the third signal except the part of the third signal, and the fourth signal includes the third signal except the part of the third signal.

[0188] In step 1304, the first device receives the first signal first, and then receives the fourth signal. The fourth signal is a signal with relatively strong signal strength, and the signal strength of the fourth signal can be less than the signal strength of the first signal. Alternatively, referring to Figure 12 After the first device receives the first signal, the fourth signal is a signal with the same or similar code stream sequence as the code stream sequence of the first signal.

[0189] In some embodiments, the first receiver reflects the signal with a strength higher than the strength of the signal reflected by the first transmitter, so that the fourth signal received by the first device has relatively strong signal strength. That is, in this case, the signal strength of the fourth signal received by the first device is higher than the second strength threshold; alternatively, referring to Figure 12 The code stream sequence of the first signal received by the first device is the same as or similar to the code stream sequence of the fourth signal. Therefore, after receiving the first signal, the first device receives the signal with a signal strength higher than the second strength threshold as the fourth signal or receives the signal with the same or similar code stream sequence as the code stream sequence of the first signal as the fourth signal.

[0190] In some embodiments, the optical fiber link can include at least one abnormal reflection point, so that the first device can receive the first signal and then receive at least one fourth signal corresponding to the at least one abnormal reflection point. For each abnormal reflection point, the first device determines the time difference between receiving the first signal and the fourth signal corresponding to the abnormal reflection point, or determines the time point of receiving the first signal and the time point of receiving the fourth signal corresponding to the abnormal reflection point.

[0191] Step 1305: The first device obtains information of the abnormal reflection point based on the time difference between the first signal and the fourth signal, or the time point of the first signal and the time point of the fourth signal.

[0192] In some embodiments, the information of the abnormal reflection point includes one or more of the following: the position of the abnormal reflection point, or the return loss size of the abnormal reflection point, etc.

[0193] In some embodiments, the information of the abnormal reflection point comprises a position of the abnormal reflection point, which is optionally a position of the abnormal reflection point from the first device. In step 1305, in a case where the first device determines the time point of the first signal and the time point of the fourth signal, the first device obtains a time difference between receiving the first signal and the fourth signal based on the time point of the first signal and the time point of the fourth signal, and obtains the position of the abnormal reflection point based on the time difference. Alternatively, in a case where the first device determines the time difference between receiving the first signal and the fourth signal, the first device obtains the position of the abnormal reflection point based on the time difference.

[0194] In some embodiments, the optical fiber link can comprise at least one abnormal reflection point, and for each abnormal reflection point, the first device can obtain a time difference between receiving the first signal and a fourth signal corresponding to the abnormal reflection point, and obtain a position of the abnormal reflection point based on the time difference according to the following fourth formula, which is a position of the abnormal reflection point from the first device.

[0195] The fourth formula is: L2 = T2 * V / 2.

[0196] In the fourth formula, L2 is the position of the abnormal reflection point from the first device, T2 is the time difference, and V is the transmission rate of the target signal.

[0197] In some embodiments, the second device and the first device are respectively the second device and the first device shown in structure 2 in the communication system 100 shown in FIG. 1. Figure 7 The target signal sent by the second device comprises a plurality of target sub-signals, the first signal received by the first device comprises a plurality of first sub-signals, and the fourth signal received comprises a plurality of fourth sub-signals. Then, for each first sub-signal in the plurality of first sub-signals, the first device can obtain a time difference between receiving each first sub-signal and a fourth sub-signal corresponding to each first sub-signal, and obtain a position of the abnormal reflection point from the first device based on the time difference between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal. For details, see the related content in step 1005 of the method 1000 shown in FIG. 1. Figure 10

[0198] In some embodiments, the information of the abnormal reflection point comprises a return loss size of the abnormal reflection point. In step 1305, the first device obtains signal strength difference information between the first signal and the fourth signal corresponding to the abnormal reflection point. The signal strength difference information comprises a signal strength difference value between the signal strength of the first signal and the signal strength of the fourth signal corresponding to the abnormal reflection point, or the signal strength difference information comprises a signal strength ratio between the signal strength of the first signal and the signal strength of the fourth signal corresponding to the abnormal reflection point.

[0199] ​In some embodiments, the signal strength difference information comprises the signal strength ratio, and the first device obtains the return loss of the abnormal reflection point according to the following fifth formula based on the signal strength ratio.

[0200] The fifth formula is: RLd = 10*log 10 (P1 / P2) - RLr.

[0201] In the fifth formula, RLd is the return loss of the abnormal reflection point, P1 / P2 is the signal strength ratio, P1 is the first signal strength of the first signal, P2 is the first signal strength of the fourth signal, P1 and P2 are both in milliwatts, RLr is the return loss of the first receiver, RLr is a value obtained by the first device in advance, and RLr is a fixed value.

[0202] In some embodiments, the signal strength difference information comprises the signal strength difference value, and the first device obtains the return loss of the abnormal reflection point according to the following sixth formula based on the signal strength difference value.

[0203] The sixth formula is: RLd = P11 - P21 - RLr.

[0204] In the sixth formula, RLd is still the return loss of the abnormal reflection point, P11 - P21 is the signal strength difference value, P11 is the second signal strength of the first signal, P21 is the second signal strength of the fourth signal, P11 and P21 are both in dbm, P11 = log 10 P1, P21 = log 10 P2, and RLr is still the return loss of the first receiver.

[0205] In some embodiments, the second device and the first device are respectively the second device and the first device shown in structure 2 of the communication system 100 shown in FIG. 1. Figure 7 The first signal received by the first device comprises a plurality of first sub-signals, and the fourth signal received by the first device comprises a plurality of fourth sub-signals. Then, for each first sub-signal in the plurality of first sub-signals, the first device can obtain signal strength difference information between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal, and obtain the return loss of the abnormal reflection point based on the signal strength difference information between each first sub-signal and the fourth sub-signal corresponding to each first sub-signal. For details, see the related content in step 1005 of method 1000 shown in FIG. 1. Figure 10

[0206] In some embodiments, the first device can also send information of the abnormal reflection point to a management device corresponding to the administrator, so that the management device determines whether to perform maintenance or other operations on the abnormal reflection point based on the information of the abnormal reflection point. ​

[0207] In some embodiments, the first device and the second device are respectively described above. Figure 6 Structure 1 or shown Figure 8 In the configuration shown in Structure 3, the second device can cyclically send the target signal N times, and the first device cyclically executes steps 1304-1305 N times to obtain N pieces of information about the abnormal reflection point, where N is an integer greater than 1. Based on these N pieces of information, the information about the abnormal reflection point is obtained. For detailed implementation details, see [link to implementation details]. Figure 10 The relevant content in step 1005 of method 1000 shown will not be described in detail here.

[0208] In some embodiments, the first device and the second device are respectively described above. Figure 7 In the configuration shown in Structure 2, the first and second devices transmit a target signal comprising Q target sub-signals, where Q is an integer greater than 1 and less than or equal to M. The second device can cyclically transmit the target signal N / Q times, and the first device cyclically executes steps 1304-1305 N / Q times to obtain N / Q pieces of information about the abnormal reflection point, and obtains the information about the abnormal reflection point based on these N / Q pieces of information.

[0209] In this embodiment, the second device transmits a target signal to the first device via a first transmitter on an optical fiber link. A portion of the target signal passes through an abnormal reflection point on the optical fiber link. The first device receives a first signal from this portion of the signal and reflects a second signal from this portion back to the abnormal reflection point. The abnormal reflection point reflects a third signal from the second signal back to the first device. The first device receives a fourth signal from the third signal. Since the wavelength of the optical signal that the first transmitter of the second device can transmit is the same as the wavelength of the optical signal that the first receiver of the first device can receive, the first device can receive the first and fourth signals from the optical fiber link through the first receiver. This eliminates the need for additional multiplexers / demultiplexers and receivers on the first device, simplifying its circuit structure and reducing its cost, as well as the cost of obtaining information about the abnormal reflection point. Based on the first and fourth signals, the first device can obtain information about the abnormal reflection point on the optical fiber link and send this information to a management device. Based on this information, maintenance and other operations can be performed on the abnormal reflection point to reduce or eliminate its impact on the optical signal transmitted on the optical fiber link.

[0210] See Figure 15 This application provides a communication system 1500, which can be used for... Figures 1-8 The communication system 100 shown in any embodiment includes a first device 1501, a second device 1502, and an optical fiber link 1503 connecting the first device 1501 and the second device 1502.

[0211] The second device 1502 is used to send a target signal to the first device 1501 via fiber optic link 1503;

[0212] The first device 1501 is used to receive a first signal, which is the signal of the target signal passing through the abnormal reflection point 1504 when there is an abnormal reflection point 1504 in the optical fiber link 1503.

[0213] Abnormal reflection point 1504 is used to reflect the target signal and generate a second signal;

[0214] The second device 1502 is also used to reflect the second signal and generate the third signal;

[0215] The first device 1501 is also used to receive a fourth signal, which is the signal of the third signal through the abnormal reflection point 1504.

[0216] The first device 1501 is also used to determine the time difference between receiving the first signal and the fourth signal, or to determine the time point at which the first signal is received and the time point at which the fourth signal is received.

[0217] Optionally, for details on how the second device 1502 transmits the target signal via fiber optic link 1503, please refer to [link to relevant documentation]. Figure 10 The relevant content in step 1001 of method 1000 shown will not be described in detail here.

[0218] Optionally, for details on how the first device 1501 receives the first signal, please refer to [link to relevant documentation]. Figure 10 The relevant content in step 1004 of method 1000 shown will not be described in detail here.

[0219] Optionally, for details on how the first device 1501 receives the fourth signal, please refer to [link to documentation]. Figure 10 The relevant content in step 1004 of method 1000 shown will not be described in detail here.

[0220] Optionally, the detailed implementation process of the first device 1501 determining the time difference between receiving the first signal and the fourth signal, or determining the time point for receiving the first signal and the time point for receiving the fourth signal, can be found in [reference needed]. Figure 10 The relevant content in step 1004 of method 1000 shown will not be described in detail here.

[0221] Optionally, if the first device 1501 determines the time difference between receiving the first signal and the fourth signal, the first device 1501 is further configured to obtain the location of the abnormal reflection point based on the time difference; or,

[0222] In a case where the first device 1501 determines the time point of receiving the first signal and the time point of receiving the fourth signal, the first device 1501 is further configured to acquire the position of the abnormal reflection point based on the time point of receiving the first signal and the time point of receiving the fourth signal.

[0223] Optionally, the detailed implementation process in which the first device 1501 acquires the position of the abnormal reflection point can refer to the related content in the step 1005 of the method 1000 shown in Figure 10 The related content in the step 1005 of the method 1000 shown in the above is not described in detail here.

[0224] Optionally, the first device 1501 is further configured to:

[0225] acquire signal strength difference information between the first signal and the fourth signal;

[0226] acquire, based on the signal strength difference information, a return loss size of the abnormal reflection point, the return loss size being used to reflect a reflection degree of the abnormal reflection point on the target signal.

[0227] Optionally, the detailed implementation process in which the first device 1501 acquires the signal strength difference information between the first signal and the fourth signal can refer to the related content in the step 1005 of the method 1000 shown in Figure 10 The related content in the step 1005 of the method 1000 shown in the above is not described in detail here.

[0228] Optionally, the detailed implementation process in which the first device 1501 acquires the return loss size of the abnormal reflection point based on the signal strength difference information can refer to the related content in the step 1005 of the method 1000 shown in Figure 10 The related content in the step 1005 of the method 1000 shown in the above is not described in detail here.

[0229] Optionally, the abnormal reflection point is located on an end face of a connector included in the optical fiber link, or the abnormal reflection point is located in an optical fiber included in the optical fiber link.

[0230] Optionally, in a case where the abnormal reflection point is located on the end face of the connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a damaged part on the end face of the connector.

[0231] In a case where the abnormal reflection point is located in the optical fiber included in the optical fiber link, the abnormal reflection point includes one or more of the following: a bubble in the optical fiber, or a crack in the optical fiber.

[0232] In the embodiments of the present application, the second device sends a target signal to the first device on the optical fiber link. An abnormal reflection point on the optical fiber link reflects a second signal in the target signal to the second device, the second device reflects a third signal in the second signal to the abnormal reflection point, and a fourth signal in the third signal passes through the abnormal reflection point. The first device receives the first signal and the fourth signal. Since the wavelength of the optical signal that the second device can send is the same as the wavelength of the optical signal that the first device can receive, the first device can receive the first signal and the fourth signal from the optical fiber link, so that an additional wavelength division multiplexer and receiver do not need to be added on the first device, the circuit structure of the first device is simplified, the cost of the first device and the cost of obtaining information of the abnormal reflection point are reduced.

[0233] Referring to Figure 16 , the embodiments of the present application provide a communication system 1600, which can be used for Figures 1-8 The communication system 100 shown in any of the embodiments includes a first device 1601, a second device 1602, and an optical fiber link 1603 connecting the first device 1601 and the second device 1602.

[0234] The second device 1602 is configured to send a target signal to the first device 1601 through the optical fiber link 1603.

[0235] The first device 1601 is configured to receive a first signal and a reflected second signal, wherein when the optical fiber link 1603 has an abnormal reflection point 1604, the signal of the target signal passing through the abnormal reflection point 1604 includes the first signal and the second signal.

[0236] The abnormal reflection point 1604 is configured to reflect the second signal to generate a third signal.

[0237] The first device 1601 is further configured to receive a fourth signal, and the third signal includes the fourth signal.

[0238] The first device 1601 is further configured to determine a time difference of receiving the first signal and the fourth signal, or determine a time point of receiving the first signal and a time point of receiving the fourth signal.

[0239] Optionally, the detailed implementation process of the second device 1602 sending the target signal through the optical fiber link 1603 is described in the related content of step 1301 of the method 1300 shown in Figure 13 , which will not be described in detail here.

[0240] Optionally, the detailed implementation process of the first device 1601 receiving the first signal and the reflected second signal is described in the related content of step 1302 of the method 1300 shown in Figure 13 , which will not be described in detail here.

[0241] Optionally, the abnormal reflection point 1604 reflects the second signal to generate a third signal. For details of the detailed implementation process of the third signal, refer to Figure 13 For details of the related content in step 1303 of the method 1300, refer to

[0242] Optionally, the first device 1601 receives the fourth signal. For details of the detailed implementation process of the fourth signal, refer to Figure 13 For details of the related content in step 1304 of the method 1300, refer to

[0243] Optionally, the first device 1601 determines the time difference between receiving the first signal and the fourth signal, or determines the time point of receiving the first signal and the time point of receiving the fourth signal. For details of the detailed implementation process of the first device 1601, refer to Figure 13 For details of the related content in step 1304 of the method 1300, refer to

[0244] Optionally, in the case that the first device determines the time difference between receiving the first signal and the fourth signal, the first device 1601 is further configured to obtain the position of the abnormal reflection point based on the time difference; or,

[0245] In the case that the first device determines the time point of receiving the first signal and the time point of receiving the fourth signal, the first device 1601 is further configured to obtain the position of the abnormal reflection point based on the time point of receiving the first signal and the time point of receiving the fourth signal.

[0246] Optionally, the first device 1601 obtains the position of the abnormal reflection point. For details of the detailed implementation process of the first device 1601, refer to Figure 13 For details of the related content in step 1305 of the method 1300, refer to

[0247] Optionally, the first device 1601 is further configured to:

[0248] obtain signal intensity difference information between the first signal and the fourth signal;

[0249] obtain the return loss size of the abnormal reflection point based on the signal intensity difference information, the return loss size being used to reflect the reflection degree of the abnormal reflection point to the target signal.

[0250] Optionally, the first device 1601 obtains the signal intensity difference information between the first signal and the fourth signal. For details of the detailed implementation process of the first device 1601, refer to Figure 13 For details of the related content in step 1305 of the method 1300, refer to

[0251] Optionally, the first device 1601 obtains the return loss size of the abnormal reflection point based on the signal intensity difference information. For details of the detailed implementation process of the first device 1601, refer to Figure 13 For details of the related content in step 1305 of the method 1300, refer to

[0252] Optionally, the abnormal reflection point is located on an end face of a connector included in the optical fiber link, or the abnormal reflection point is located in an optical fiber included in the optical fiber link.

[0253] Optionally, in the case where the abnormal reflection point is located on the end face of the connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a damaged portion on the end face of the connector.

[0254] In the case where the abnormal reflection point is located in the optical fiber included in the optical fiber link, the abnormal reflection point includes one or more of the following: a bubble in the optical fiber, or a crack in the optical fiber.

[0255] In the embodiments of the present application, the second device sends a target signal to the first device on the optical fiber link. Part of the target signal passes through the abnormal reflection point on the optical fiber link, the first device receives a first signal in the part of the signal and a second signal in the part of the signal reflected by the abnormal reflection point, and the abnormal reflection point reflects a third signal in the second signal to the first device. The first device receives a fourth signal in the third signal. Since the wavelength of the optical signal that the second device can send is the same as the wavelength of the optical signal that the first device can receive, the first device can receive the first signal and the fourth signal from the optical fiber link, thereby not needing to add an additional wavelength division multiplexer and a receiver on the first device, simplifying the circuit structure of the first device and reducing the cost of the first device and the cost of obtaining information of the abnormal reflection point.

[0256] Referring to Figure 17 The embodiments of the present application provide a signal processing apparatus 1700, the apparatus 1700 is located in a communication system, the communication system further includes a second device and an optical fiber link connecting the apparatus 1700 and the second device, and the apparatus 1700 includes:

[0257] A communication unit 1701, configured to receive a first signal when an abnormal reflection point exists in the optical fiber link, the first signal being a signal of a target signal sent by the second device to the apparatus 1700 through the optical fiber link and passing through the abnormal reflection point, and a second signal in the target signal being reflected by the abnormal reflection point;

[0258] The communication unit 1701 is further configured to receive a fourth signal, the fourth signal being a signal of a third signal generated by the second device reflecting the second signal and passing through the abnormal reflection point;

[0259] A processing unit 1702, configured to determine a time difference of receiving the first signal and the fourth signal or determine a time point of receiving the first signal and a time point of receiving the fourth signal.

[0260] Optionally, the communication unit 1701 receives the first signal, and the detailed implementation process is referred to the related content in the step 1004 of the method 1000 as shown in the following table. Figure 10 The related content in the step 1004 of the method 1000 as shown in the following table is not described in detail here.

[0261] Optionally, the communication unit 1701 receives the fourth signal, and the detailed implementation process is referred to the related content in the step 1004 of the method 1000 as shown in the following table. Figure 10 The related content in the step 1004 of the method 1000 as shown in the following table is not described in detail here.

[0262] Optionally, the processing unit 1702 determines the time difference between the time of receiving the first signal and the time of receiving the fourth signal, or determines the time point of receiving the first signal and the time point of receiving the fourth signal, and the detailed implementation process is referred to the related content in the step 1004 of the method 1000 as shown in the following table. Figure 10 The related content in the step 1004 of the method 1000 as shown in the following table is not described in detail here.

[0263] Optionally, the processing unit 1702 is further configured to:

[0264] In the case of determining the time difference between the time of receiving the first signal and the time of receiving the fourth signal, the position of the abnormal reflection point is obtained based on the time difference; or,

[0265] In the case of determining the time point of receiving the first signal and the time point of receiving the fourth signal, the position of the abnormal reflection point is obtained based on the time point of receiving the first signal and the time point of receiving the fourth signal.

[0266] Optionally, the processing unit 1702 obtains the position of the abnormal reflection point, and the detailed implementation process is referred to the related content in the step 1005 of the method 1000 as shown in the following table. Figure 10 The related content in the step 1005 of the method 1000 as shown in the following table is not described in detail here.

[0267] Optionally, the processing unit 1702 is further configured to:

[0268] Obtain the signal intensity difference information between the first signal and the fourth signal;

[0269] Based on the signal intensity difference information, the return loss size of the abnormal reflection point is obtained, and the return loss size is used to reflect the reflection degree of the abnormal reflection point to the target signal.

[0270] In the embodiment of the present application, the second device sends a target signal to the device on the optical fiber link. An abnormal reflection point on the optical fiber link reflects a second signal in the target signal to the second device, the second device reflects a third signal in the second signal to the abnormal reflection point, and a fourth signal in the third signal passes through the abnormal reflection point. The communication unit receives the first signal and the fourth signal. Since the wavelength of the optical signal that the second device can send is the same as the wavelength of the optical signal that the communication unit can receive, the communication unit can receive the first signal and the fourth signal from the optical fiber link, so that an additional wavelength division multiplexer and receiver do not need to be added to the device, the circuit structure of the device is simplified, the cost of the device and the cost of obtaining information of the abnormal reflection point are reduced.

[0271] Referring to Figure 18 The embodiment of the present application provides a device 1800 for signal processing, the device 1800 is located in a communication system, the communication system further includes a second device and an optical fiber link connecting the device 1800 and the second device, and the device 1800 comprises:

[0272] The communication unit 1801 is configured to receive a first signal and a reflected second signal when there is an abnormal reflection point on the optical fiber link, wherein the signal of the target signal sent by the second device to the device 1800 through the abnormal reflection point includes the first signal and the second signal;

[0273] The communication unit 1801 is further configured to receive a fourth signal, the fourth signal is a third signal generated by the abnormal reflection point reflecting the second signal;

[0274] The processing unit 1802 is configured to determine a time difference between receiving the first signal and the fourth signal or determine a time point of receiving the first signal and a time point of receiving the fourth signal.

[0275] Optionally, the detailed implementation process of the communication unit 1801 receiving the first signal and the reflected second signal can be referred to the related content in step 1302 of the method 1300 shown in Figure 13 The detailed description is not repeated here.

[0276] Optionally, the detailed implementation process of the communication unit 1801 receiving the fourth signal can be referred to the related content in step 1304 of the method 1300 shown in Figure 13 The detailed description is not repeated here.

[0277] Optionally, the detailed implementation process of the processing unit 1802 determining the time difference between receiving the first signal and the fourth signal or determining the time point of receiving the first signal and the time point of receiving the fourth signal can be referred to the related content in step 1304 of the method 1300 shown in Figure 13 The detailed description is not repeated here.

[0278] Optionally, the processing unit 1802 is further configured to:

[0279] In a case where the time difference of receiving the first signal and the fourth signal is determined, the position of the abnormal reflection point is acquired based on the time difference; or

[0280] In a case where the time point of receiving the first signal and the time point of receiving the fourth signal are determined, the position of the abnormal reflection point is acquired based on the time point of receiving the first signal and the time point of receiving the fourth signal.

[0281] Optionally, the detailed implementation process of the processing unit 1802 acquiring the position of the abnormal reflection point can be referred to the related content in step 1305 of the method 1300 shown in Figure 13 The related content in step 1305 of the method 1300 shown in

[0282] Optionally, the processing unit 1802 is further configured to:

[0283] Acquire the signal intensity difference information between the first signal and the fourth signal;

[0284] Acquire the return loss size of the abnormal reflection point based on the signal intensity difference information, and the return loss size is used to reflect the reflection degree of the abnormal reflection point to the target signal.

[0285] Optionally, the detailed implementation process of the processing unit 1802 acquiring the signal intensity difference information between the first signal and the fourth signal can be referred to the related content in step 1305 of the method 1300 shown in Figure 13 The related content in step 1305 of the method 1300 shown in

[0286] Optionally, the detailed implementation process of the processing unit 1802 acquiring the return loss size of the abnormal reflection point based on the signal intensity difference information can be referred to the related content in step 1305 of the method 1300 shown in Figure 13 The related content in step 1305 of the method 1300 shown in

[0287] In the embodiment of the application, the second device sends the target signal to the first device on the optical fiber link. Part of the signals in the target signal pass through the abnormal reflection point on the optical fiber link, the communication unit receives the first signal in the part of the signals and the second signal in the part of the signals reflected to the abnormal reflection point, and the abnormal reflection point reflects the third signal in the second signal to the communication unit. The communication unit receives the fourth signal in the third signal. Since the wavelength of the optical signal capable of being sent by the second device is the same as the wavelength of the optical signal capable of being received by the communication unit, the communication unit can receive the first signal and the fourth signal from the optical fiber link, so that an additional wavelength division multiplexer and receiver do not need to be added on the device, the circuit structure of the device is simplified, the cost of the device and the cost of obtaining the information of the abnormal reflection point are reduced.

[0288] SeeFigure 19 An apparatus 1900 for signal processing is provided. The apparatus 1900 can be a first device in any of the embodiments described above. For example, the apparatus 1900 can be the first device 101 in the communication system 100 as shown in FIG. 1, or the apparatus 1900 can be the first device in the method 1000 as shown in FIG. 10, or the apparatus 1900 can be the first device in the method 1300 as shown in FIG. 13. The apparatus 1900 includes at least one processor 1901, an internal connection 1902, a memory 1903, and at least one transceiver 1904. Figures 1 to 8 Figure 10 Figure 13 The apparatus 1900 includes at least one processor 1901, an internal connection 1902, a memory 1903, and at least one transceiver 1904.

[0289] The apparatus 1900 is a hardware structure, which can be used to implement the functional modules in the apparatus 1700. For example, the processing unit 1702 in the apparatus 1700 can be implemented by the at least one processor 1901 invoking the code in the memory 1903. Figure 17 Figure 17 The communication unit 1701 in the apparatus 1700 can be implemented by the transceiver 1904. Alternatively, for example, the processing unit 1802 in the apparatus 1800 can be implemented by the at least one processor 1901 invoking the code in the memory 1903. Figure 17 Figure 18 The communication unit 1801 in the apparatus 1800 can be implemented by the transceiver 1904. Figure 18

[0290] Optionally, the apparatus 1900 can also be used to implement the functions of the first device in any of the embodiments described above.

[0291] Optionally, the processor 1901 can be a general central processing unit (CPU), a network processing unit (NP), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the embodiments.

[0292] The internal connection 1902 can include a path for transmitting information between the components described above. Optionally, the internal connection 1902 is a single board or a bus, etc.

[0293] The transceiver 1904 is used to communicate with other devices or communication networks.

[0294] ​​​​​The memory 1903 can be read-only memory (ROM) or other type of static storage devices that can store static information and instructions, random access memory (RAM), or other type of dynamic storage device that can store information and instructions, electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium capable of storing instructions or data that can be accessed by a computer, but not limited to. The memory can exist independently and be connected to the processor through a bus. The memory can also be integrated with the processor.

[0295] The memory 1903 is configured to store application program codes for implementing the solutions of the present application, and the processor 1901 is configured to control the execution of the application program codes. The processor 1901 is configured to execute the application program codes stored in the memory 1903, and cooperate with the at least one transceiver 1904, so that the device 1900 implements the functions in the patent method.

[0296] In specific implementations, as an example, the processor 1901 can include one or more CPUs, such as the CPU0 and the CPU1 in the Figure 19 In specific implementations, as an example, the processor 1901 can include one or more CPUs, such as the CPU0 and the CPU1 in the

[0297] In specific implementations, as an example, the device 1900 can include multiple processors, such as the processor 1901 and the processor 1907 in the Figure 19 In specific implementations, as an example, the device 1900 can include multiple processors, such as the processor 1901 and the processor 1907 in the

[0298] The information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the present application are authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0299] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or can be instructed by a program to complete the related hardware, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0300] The above only describes optional embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A signal processing method, characterized in that, The method is applied to a communication system, the communication system including a first device, a second device, and an optical fiber link connecting the first device and the second device, the method comprising: The second device sends a target signal to the first device via the optical fiber link; When there is an abnormal reflection point in the optical fiber link, the first device receives a first signal, which is the signal of the target signal passing through the abnormal reflection point. The abnormal reflection point reflects the target signal, generating a second signal; The second device reflects the second signal to generate a third signal; The first device receives a fourth signal, which is the signal of the third signal passing through the abnormal reflection point; Determine the time difference between the first device receiving the first signal and the fourth signal, or determine the time point at which the first device receives the first signal and the time point at which it receives the fourth signal.

2. The method as described in claim 1, characterized in that, The method further includes: If the time difference between the first device receiving the first signal and the fourth signal is determined, the first device obtains the location of the abnormal reflection point based on the time difference; or, Once the time point at which the first device receives the first signal and the time point at which it receives the fourth signal are determined, the first device obtains the location of the abnormal reflection point based on the time point at which it receives the first signal and the time point at which it receives the fourth signal.

3. The method as described in claim 1 or 2, characterized in that, The method further includes: The first device acquires signal strength difference information between the first signal and the fourth signal; The first device obtains the return loss magnitude of the abnormal reflection point based on the signal strength difference information. The return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

4. The method according to any one of claims 1-3, characterized in that, The abnormal reflection point is located on the end face of the connector included in the optical fiber link, or the abnormal reflection point is located in the optical fiber included in the optical fiber link.

5. The method as described in claim 4, characterized in that, When the abnormal reflection point is located on the end face of the connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a damaged portion on the end face of the connector. In the case where the anomalous reflection point is located in an optical fiber included in the optical fiber link, the anomalous reflection point includes one or more of the following: bubbles in the optical fiber, or cracks in the optical fiber.

6. A signal processing method, characterized in that, The method is applied to a communication system, the communication system including a first device, a second device, and an optical fiber link connecting the first device and the second device, the method comprising: The second device sends a target signal to the first device via the optical fiber link; When there is an abnormal reflection point in the optical fiber link, the first device receives a first signal and reflects a second signal, wherein the target signal passing through the abnormal reflection point includes the first signal and the second signal. The abnormal reflection point reflects the second signal, generating a third signal; The first device receives a fourth signal, and the third signal includes the fourth signal; Determine the time difference between the first device receiving the first signal and the fourth signal, or determine the time point at which the first device receives the first signal and the time point at which it receives the fourth signal.

7. The method as described in claim 6, characterized in that, The method further includes: If the time difference between the first device receiving the first signal and the fourth signal is determined, the first device obtains the location of the abnormal reflection point based on the time difference; or, Given that the time point at which the first device receives the first signal and the time point at which it receives the fourth signal are determined, the first device obtains the location of the abnormal reflection point based on the time point at which it receives the first signal and the time point at which it receives the fourth signal.

8. The method as described in claim 6 or 7, characterized in that, The method further includes: The first device acquires signal strength difference information between the first signal and the fourth signal; The first device obtains the return loss magnitude of the abnormal reflection point based on the signal strength difference information. The return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

9. A signal processing method, characterized in that, The method is applied to a first device in a communication system, the communication system further comprising a second device and an optical fiber link connecting the first device and the second device, the method comprising: When there is an abnormal reflection point in the optical fiber link, the first device receives a first signal. The first signal is the signal of the target signal sent by the second device to the first device through the optical fiber link passing through the abnormal reflection point. The second signal in the target signal, other than the first signal, is reflected by the abnormal reflection point. The first device receives a fourth signal, which is a signal generated by the second device reflecting the second signal and passing through the abnormal reflection point; The first device determines the time difference between receiving the first signal and the fourth signal, or determines the time point at which the first signal is received and the time point at which the fourth signal is received.

10. The method as described in claim 9, characterized in that, The method further includes: If the first device determines the time difference between receiving the first signal and the fourth signal, the first device obtains the location of the abnormal reflection point based on the time difference; or... When the first device determines the time point at which it receives the first signal and the time point at which it receives the fourth signal, the first device obtains the location of the abnormal reflection point based on the time point at which it receives the first signal and the time point at which it receives the fourth signal.

11. The method as described in claim 9 or 10, characterized in that, The method further includes: The first device acquires signal strength difference information between the first signal and the fourth signal; The first device obtains the return loss magnitude of the abnormal reflection point based on the signal strength difference information. The return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

12. A signal processing method, characterized in that, The method is applied to a first device in a communication system, the communication system further comprising a second device and an optical fiber link connecting the first device and the second device, the method comprising: When there is an abnormal reflection point in the optical fiber link, the first device receives a first signal and reflects a second signal, wherein the target signal sent by the second device to the first device through the optical fiber link includes the first signal and the second signal through the abnormal reflection point. The first device receives a fourth signal, which is the third signal generated by the reflection of the second signal by the abnormal reflection point; The first device determines the time difference between receiving the first signal and the fourth signal, or determines the time point at which the first signal is received and the time point at which the fourth signal is received.

13. The method as described in claim 12, characterized in that, The method further includes: If the first device determines the time difference between receiving the first signal and the fourth signal, the first device obtains the location of the abnormal reflection point based on the time difference; or... When the first device determines the time point at which it receives the first signal and the time point at which it receives the fourth signal, the first device obtains the location of the abnormal reflection point based on the time point at which it receives the first signal and the time point at which it receives the fourth signal.

14. The method as described in claim 12 or 13, characterized in that, The method further includes: The first device acquires signal strength difference information between the first signal and the fourth signal; The first device obtains the return loss magnitude of the abnormal reflection point based on the signal strength difference information. The return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

15. A communication system, characterized in that, The communication system includes a first device, a second device, and an optical fiber link connecting the first device and the second device; The second device is used to send a target signal to the first device via the optical fiber link; The first device is used to receive a first signal, which is the signal of the target signal passing through the abnormal reflection point when there is an abnormal reflection point in the optical fiber link; The abnormal reflection point is used to reflect the target signal and generate a second signal; The second device is also used to reflect the second signal to generate a third signal; The first device is also configured to receive a fourth signal, which is the signal of the third signal passing through the abnormal reflection point; The first device is further configured to determine the time difference between receiving the first signal and the fourth signal, or to determine the time point at which the first signal is received and the time point at which the fourth signal is received.

16. The communication system as described in claim 15, characterized in that, If the first device determines the time difference between receiving the first signal and the fourth signal, the first device is further configured to obtain the location of the abnormal reflection point based on the time difference; or... When the first device determines the time point at which the first signal is received and the time point at which the fourth signal is received, the first device is further configured to obtain the location of the abnormal reflection point based on the time point at which the first signal is received and the time point at which the fourth signal is received.

17. The communication system as described in claim 15 or 16, characterized in that, The first device is also used for: Obtain the signal strength difference information between the first signal and the fourth signal; Based on the signal strength difference information, the return loss magnitude of the abnormal reflection point is obtained, and the return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

18. The communication system according to any one of claims 15-17, characterized in that, The abnormal reflection point is located on the end face of the connector included in the optical fiber link, or the abnormal reflection point is located in the optical fiber included in the optical fiber link.

19. The communication system as described in claim 18, characterized in that, When the abnormal reflection point is located on the end face of the connector included in the optical fiber link, the abnormal reflection point includes one or more of the following: dirt on the end face of the connector, or a damaged portion on the end face of the connector. In the case where the anomalous reflection point is located in an optical fiber included in the optical fiber link, the anomalous reflection point includes one or more of the following: bubbles in the optical fiber, or cracks in the optical fiber.

20. A communication system, characterized in that, The communication system includes a first device, a second device, and an optical fiber link connecting the first device and the second device; The second device is used to send a target signal to the first device via the optical fiber link; The first device is used to receive a first signal and reflect a second signal, wherein when there is an abnormal reflection point in the optical fiber link, the target signal passing through the abnormal reflection point includes the first signal and the second signal; The abnormal reflection point is used to reflect the second signal and generate the third signal; The first device is also configured to receive a fourth signal, wherein the third signal includes the fourth signal; The first device is further configured to determine the time difference between receiving the first signal and the fourth signal, or to determine the time point at which the first signal is received and the time point at which the fourth signal is received.

21. The communication system as described in claim 20, characterized in that, If the first device determines the time difference between receiving the first signal and the fourth signal, the first device is further configured to obtain the location of the abnormal reflection point based on the time difference; or... When the first device determines the time point at which the first signal is received and the time point at which the fourth signal is received, the first device is further configured to obtain the location of the abnormal reflection point based on the time point at which the first signal is received and the time point at which the fourth signal is received.

22. The communication system as described in claim 20 or 21, characterized in that, The first device is also used for: Obtain the signal strength difference information between the first signal and the fourth signal; Based on the signal strength difference information, the return loss magnitude of the abnormal reflection point is obtained, and the return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

23. A signal processing apparatus, characterized in that, The device is located in a communication system, which further includes a second device and an optical fiber link connecting the device and the second device. The device includes: A communication unit is used to receive a first signal when there is an abnormal reflection point in the optical fiber link. The first signal is a signal of a target signal sent by the second device to the device through the optical fiber link passing through the abnormal reflection point. A second signal in the target signal other than the first signal is reflected by the abnormal reflection point. The communication unit is also used to receive a fourth signal, which is the signal of the third signal generated by the second device reflecting the second signal through the abnormal reflection point; The processing unit is configured to determine the time difference between receiving the first signal and the fourth signal, or to determine the time point at which the first signal is received and the time point at which the fourth signal is received.

24. The apparatus as claimed in claim 23, characterized in that, The processing unit is further configured to: If the time difference between receiving the first signal and the fourth signal is determined, the location of the abnormal reflection point is obtained based on the time difference; or, Given the time points at which the first signal and the fourth signal are received, the location of the abnormal reflection point is obtained based on these time points.

25. The apparatus as claimed in claim 23 or 24, characterized in that, The processing unit is further configured to: Obtain the signal strength difference information between the first signal and the fourth signal; Based on the signal strength difference information, the return loss magnitude of the abnormal reflection point is obtained, and the return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

26. A signal processing apparatus, characterized in that, The device is located in a communication system, which further includes a second device and an optical fiber link connecting the device and the second device. The device includes: A communication unit is used to receive a first signal and reflect a second signal when there is an abnormal reflection point in the optical fiber link, wherein the target signal sent by the second device to the device through the optical fiber link and the signal of the abnormal reflection point includes the first signal and the second signal. The communication unit is also used to receive a fourth signal, which is a signal included in the third signal generated by the reflection of the second signal by the abnormal reflection point; The processing unit is configured to determine the time difference between receiving the first signal and the fourth signal, or to determine the time point at which the first signal is received and the time point at which the fourth signal is received.

27. The apparatus as claimed in claim 26, characterized in that, The processing unit is further configured to: If the time difference between receiving the first signal and the fourth signal is determined, the location of the abnormal reflection point is obtained based on the time difference; or, Given the time points at which the first signal and the fourth signal are received, the location of the abnormal reflection point is obtained based on these time points.

28. The apparatus as claimed in claim 26 or 27, characterized in that, The processing unit is further configured to: Obtain the signal strength difference information between the first signal and the fourth signal; Based on the signal strength difference information, the return loss magnitude of the abnormal reflection point is obtained, and the return loss magnitude is used to reflect the degree of reflection of the target signal by the abnormal reflection point.

29. A signal processing device, characterized in that, The device includes at least one processor and at least one memory, wherein the at least one memory stores computer-readable instructions; the at least one processor executes the computer-readable instructions to cause the device to perform the method as described in any one of claims 9-11 or any one of claims 12-14.

Images